Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.cpp @ 24233:8128b98d4736 jvmci-0.36
Crash in rebuild_cpu_to_node_map (JDK-8165153)
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Mon, 18 Sep 2017 18:02:23 +0200 |
| parents | 719853999215 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 // no precompiled headers |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "classfile/vmSymbols.hpp" | |
| 29 #include "code/icBuffer.hpp" | |
| 30 #include "code/vtableStubs.hpp" | |
| 31 #include "compiler/compileBroker.hpp" | |
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32 #include "compiler/disassembler.hpp" |
| 1972 | 33 #include "interpreter/interpreter.hpp" |
| 34 #include "jvm_linux.h" | |
| 35 #include "memory/allocation.inline.hpp" | |
| 36 #include "memory/filemap.hpp" | |
| 37 #include "mutex_linux.inline.hpp" | |
| 38 #include "oops/oop.inline.hpp" | |
| 39 #include "os_share_linux.hpp" | |
| 40 #include "prims/jniFastGetField.hpp" | |
| 41 #include "prims/jvm.h" | |
| 42 #include "prims/jvm_misc.hpp" | |
| 43 #include "runtime/arguments.hpp" | |
| 44 #include "runtime/extendedPC.hpp" | |
| 45 #include "runtime/globals.hpp" | |
| 46 #include "runtime/interfaceSupport.hpp" | |
|
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47 #include "runtime/init.hpp" |
| 1972 | 48 #include "runtime/java.hpp" |
| 49 #include "runtime/javaCalls.hpp" | |
| 50 #include "runtime/mutexLocker.hpp" | |
| 51 #include "runtime/objectMonitor.hpp" | |
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52 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 53 #include "runtime/osThread.hpp" |
| 54 #include "runtime/perfMemory.hpp" | |
| 55 #include "runtime/sharedRuntime.hpp" | |
| 56 #include "runtime/statSampler.hpp" | |
| 57 #include "runtime/stubRoutines.hpp" | |
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58 #include "runtime/thread.inline.hpp" |
| 1972 | 59 #include "runtime/threadCritical.hpp" |
| 60 #include "runtime/timer.hpp" | |
| 61 #include "services/attachListener.hpp" | |
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62 #include "services/memTracker.hpp" |
| 1972 | 63 #include "services/runtimeService.hpp" |
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64 #include "utilities/decoder.hpp" |
| 1972 | 65 #include "utilities/defaultStream.hpp" |
| 66 #include "utilities/events.hpp" | |
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67 #include "utilities/elfFile.hpp" |
| 1972 | 68 #include "utilities/growableArray.hpp" |
| 69 #include "utilities/vmError.hpp" | |
| 0 | 70 |
| 71 // put OS-includes here | |
| 72 # include <sys/types.h> | |
| 73 # include <sys/mman.h> | |
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74 # include <sys/stat.h> |
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75 # include <sys/select.h> |
| 0 | 76 # include <pthread.h> |
| 77 # include <signal.h> | |
| 78 # include <errno.h> | |
| 79 # include <dlfcn.h> | |
| 80 # include <stdio.h> | |
| 81 # include <unistd.h> | |
| 82 # include <sys/resource.h> | |
| 83 # include <pthread.h> | |
| 84 # include <sys/stat.h> | |
| 85 # include <sys/time.h> | |
| 86 # include <sys/times.h> | |
| 87 # include <sys/utsname.h> | |
| 88 # include <sys/socket.h> | |
| 89 # include <sys/wait.h> | |
| 90 # include <pwd.h> | |
| 91 # include <poll.h> | |
| 92 # include <semaphore.h> | |
| 93 # include <fcntl.h> | |
| 94 # include <string.h> | |
| 95 # include <syscall.h> | |
| 96 # include <sys/sysinfo.h> | |
| 97 # include <gnu/libc-version.h> | |
| 98 # include <sys/ipc.h> | |
| 99 # include <sys/shm.h> | |
| 100 # include <link.h> | |
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101 # include <stdint.h> |
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102 # include <inttypes.h> |
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103 # include <sys/ioctl.h> |
| 0 | 104 |
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105 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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106 |
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107 #ifndef _GNU_SOURCE |
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108 #define _GNU_SOURCE |
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109 #include <sched.h> |
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110 #undef _GNU_SOURCE |
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111 #else |
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112 #include <sched.h> |
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113 #endif |
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114 |
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115 // if RUSAGE_THREAD for getrusage() has not been defined, do it here. The code calling |
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116 // getrusage() is prepared to handle the associated failure. |
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117 #ifndef RUSAGE_THREAD |
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118 #define RUSAGE_THREAD (1) /* only the calling thread */ |
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119 #endif |
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120 |
| 0 | 121 #define MAX_PATH (2 * K) |
| 122 | |
| 17738 | 123 #define MAX_SECS 100000000 |
| 124 | |
| 0 | 125 // for timer info max values which include all bits |
| 126 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
| 127 | |
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128 #define LARGEPAGES_BIT (1 << 6) |
| 0 | 129 //////////////////////////////////////////////////////////////////////////////// |
| 130 // global variables | |
| 131 julong os::Linux::_physical_memory = 0; | |
| 132 | |
| 133 address os::Linux::_initial_thread_stack_bottom = NULL; | |
| 134 uintptr_t os::Linux::_initial_thread_stack_size = 0; | |
| 135 | |
| 136 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; | |
| 137 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; | |
| 138 Mutex* os::Linux::_createThread_lock = NULL; | |
| 139 pthread_t os::Linux::_main_thread; | |
| 140 int os::Linux::_page_size = -1; | |
|
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141 const int os::Linux::_vm_default_page_size = (8 * K); |
| 0 | 142 bool os::Linux::_is_floating_stack = false; |
| 143 bool os::Linux::_is_NPTL = false; | |
| 144 bool os::Linux::_supports_fast_thread_cpu_time = false; | |
|
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145 const char * os::Linux::_glibc_version = NULL; |
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146 const char * os::Linux::_libpthread_version = NULL; |
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147 pthread_condattr_t os::Linux::_condattr[1]; |
| 0 | 148 |
| 149 static jlong initial_time_count=0; | |
| 150 | |
| 151 static int clock_tics_per_sec = 100; | |
| 152 | |
| 153 // For diagnostics to print a message once. see run_periodic_checks | |
| 154 static sigset_t check_signal_done; | |
| 14391 | 155 static bool check_signals = true; |
| 0 | 156 |
| 157 static pid_t _initial_pid = 0; | |
| 158 | |
| 159 /* Signal number used to suspend/resume a thread */ | |
| 160 | |
| 161 /* do not use any signal number less than SIGSEGV, see 4355769 */ | |
| 162 static int SR_signum = SIGUSR2; | |
| 163 sigset_t SR_sigset; | |
| 164 | |
| 242 | 165 /* Used to protect dlsym() calls */ |
| 166 static pthread_mutex_t dl_mutex; | |
| 167 | |
| 10405 | 168 // Declarations |
| 169 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); | |
| 170 | |
| 0 | 171 // utility functions |
| 172 | |
| 173 static int SR_initialize(); | |
| 174 | |
| 175 julong os::available_memory() { | |
| 176 return Linux::available_memory(); | |
| 177 } | |
| 178 | |
| 179 julong os::Linux::available_memory() { | |
| 180 // values in struct sysinfo are "unsigned long" | |
| 181 struct sysinfo si; | |
| 182 sysinfo(&si); | |
| 183 | |
| 184 return (julong)si.freeram * si.mem_unit; | |
| 185 } | |
| 186 | |
| 187 julong os::physical_memory() { | |
| 188 return Linux::physical_memory(); | |
| 189 } | |
| 190 | |
| 191 //////////////////////////////////////////////////////////////////////////////// | |
| 192 // environment support | |
| 193 | |
| 194 bool os::getenv(const char* name, char* buf, int len) { | |
| 195 const char* val = ::getenv(name); | |
| 196 if (val != NULL && strlen(val) < (size_t)len) { | |
| 197 strcpy(buf, val); | |
| 198 return true; | |
| 199 } | |
| 200 if (len > 0) buf[0] = 0; // return a null string | |
| 201 return false; | |
| 202 } | |
| 203 | |
| 204 | |
| 205 // Return true if user is running as root. | |
| 206 | |
| 207 bool os::have_special_privileges() { | |
| 208 static bool init = false; | |
| 209 static bool privileges = false; | |
| 210 if (!init) { | |
| 211 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 212 init = true; | |
| 213 } | |
| 214 return privileges; | |
| 215 } | |
| 216 | |
| 217 | |
| 218 #ifndef SYS_gettid | |
| 219 // i386: 224, ia64: 1105, amd64: 186, sparc 143 | |
|
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220 #ifdef __ia64__ |
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221 #define SYS_gettid 1105 |
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222 #else |
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223 #ifdef __i386__ |
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224 #define SYS_gettid 224 |
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225 #else |
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226 #ifdef __amd64__ |
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227 #define SYS_gettid 186 |
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228 #else |
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229 #ifdef __sparc__ |
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230 #define SYS_gettid 143 |
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231 #else |
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232 #error define gettid for the arch |
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233 #endif |
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234 #endif |
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235 #endif |
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236 #endif |
| 0 | 237 #endif |
| 238 | |
| 239 // Cpu architecture string | |
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240 static char cpu_arch[] = HOTSPOT_LIB_ARCH; |
| 0 | 241 |
| 242 // pid_t gettid() | |
| 243 // | |
| 244 // Returns the kernel thread id of the currently running thread. Kernel | |
| 245 // thread id is used to access /proc. | |
| 246 // | |
| 247 // (Note that getpid() on LinuxThreads returns kernel thread id too; but | |
| 248 // on NPTL, it returns the same pid for all threads, as required by POSIX.) | |
| 249 // | |
| 250 pid_t os::Linux::gettid() { | |
| 251 int rslt = syscall(SYS_gettid); | |
| 252 if (rslt == -1) { | |
| 253 // old kernel, no NPTL support | |
| 254 return getpid(); | |
| 255 } else { | |
| 256 return (pid_t)rslt; | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 // Most versions of linux have a bug where the number of processors are | |
| 261 // determined by looking at the /proc file system. In a chroot environment, | |
| 262 // the system call returns 1. This causes the VM to act as if it is | |
| 263 // a single processor and elide locking (see is_MP() call). | |
| 264 static bool unsafe_chroot_detected = false; | |
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265 static const char *unstable_chroot_error = "/proc file system not found.\n" |
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266 "Java may be unstable running multithreaded in a chroot " |
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267 "environment on Linux when /proc filesystem is not mounted."; |
| 0 | 268 |
| 269 void os::Linux::initialize_system_info() { | |
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270 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
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271 if (processor_count() == 1) { |
| 0 | 272 pid_t pid = os::Linux::gettid(); |
| 273 char fname[32]; | |
| 274 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); | |
| 275 FILE *fp = fopen(fname, "r"); | |
| 276 if (fp == NULL) { | |
| 277 unsafe_chroot_detected = true; | |
| 278 } else { | |
| 279 fclose(fp); | |
| 280 } | |
| 281 } | |
| 282 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
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283 assert(processor_count() > 0, "linux error"); |
| 0 | 284 } |
| 285 | |
| 286 void os::init_system_properties_values() { | |
| 287 // The next steps are taken in the product version: | |
| 288 // | |
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289 // Obtain the JAVA_HOME value from the location of libjvm.so. |
| 0 | 290 // This library should be located at: |
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291 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
| 0 | 292 // |
| 293 // If "/jre/lib/" appears at the right place in the path, then we | |
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294 // assume libjvm.so is installed in a JDK and we use this path. |
| 0 | 295 // |
| 296 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 297 // | |
| 298 // The following extra steps are taken in the debugging version: | |
| 299 // | |
| 300 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 301 // instead of exit check for $JAVA_HOME environment variable. | |
| 302 // | |
| 303 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
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304 // then we append a fake suffix "hotspot/libjvm.so" to this path so |
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305 // it looks like libjvm.so is installed there |
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306 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
| 0 | 307 // |
| 308 // Otherwise exit. | |
| 309 // | |
| 310 // Important note: if the location of libjvm.so changes this | |
| 311 // code needs to be changed accordingly. | |
| 312 | |
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313 // See ld(1): |
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314 // The linker uses the following search paths to locate required |
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315 // shared libraries: |
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316 // 1: ... |
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317 // ... |
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318 // 7: The default directories, normally /lib and /usr/lib. |
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319 #if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390)) |
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320 #define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib" |
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321 #else |
| 0 | 322 #define DEFAULT_LIBPATH "/lib:/usr/lib" |
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323 #endif |
| 0 | 324 |
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325 // Base path of extensions installed on the system. |
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326 #define SYS_EXT_DIR "/usr/java/packages" |
| 0 | 327 #define EXTENSIONS_DIR "/lib/ext" |
| 328 #define ENDORSED_DIR "/lib/endorsed" | |
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329 |
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330 // Buffer that fits several sprintfs. |
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331 // Note that the space for the colon and the trailing null are provided |
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332 // by the nulls included by the sizeof operator. |
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333 const size_t bufsize = |
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334 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. |
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335 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir |
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336 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
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337 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
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338 |
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339 // sysclasspath, java_home, dll_dir |
| 0 | 340 { |
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341 char *pslash; |
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342 os::jvm_path(buf, bufsize); |
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343 |
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344 // Found the full path to libjvm.so. |
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345 // Now cut the path to <java_home>/jre if we can. |
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346 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
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347 pslash = strrchr(buf, '/'); |
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348 if (pslash != NULL) { |
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349 *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
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350 } |
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351 Arguments::set_dll_dir(buf); |
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352 |
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353 if (pslash != NULL) { |
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354 pslash = strrchr(buf, '/'); |
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355 if (pslash != NULL) { |
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356 *pslash = '\0'; // Get rid of /<arch>. |
| 0 | 357 pslash = strrchr(buf, '/'); |
| 358 if (pslash != NULL) { | |
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359 *pslash = '\0'; // Get rid of /lib. |
| 0 | 360 } |
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361 } |
| 0 | 362 } |
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363 Arguments::set_java_home(buf); |
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364 set_boot_path('/', ':'); |
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365 } |
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366 |
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367 // Where to look for native libraries. |
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368 // |
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369 // Note: Due to a legacy implementation, most of the library path |
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370 // is set in the launcher. This was to accomodate linking restrictions |
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371 // on legacy Linux implementations (which are no longer supported). |
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372 // Eventually, all the library path setting will be done here. |
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373 // |
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374 // However, to prevent the proliferation of improperly built native |
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375 // libraries, the new path component /usr/java/packages is added here. |
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376 // Eventually, all the library path setting will be done here. |
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377 { |
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378 // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
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379 // should always exist (until the legacy problem cited above is |
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380 // addressed). |
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381 const char *v = ::getenv("LD_LIBRARY_PATH"); |
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382 const char *v_colon = ":"; |
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383 if (v == NULL) { v = ""; v_colon = ""; } |
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384 // That's +1 for the colon and +1 for the trailing '\0'. |
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385 char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, |
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386 strlen(v) + 1 + |
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387 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH) + 1, |
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388 mtInternal); |
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389 sprintf(ld_library_path, "%s%s" SYS_EXT_DIR "/lib/%s:" DEFAULT_LIBPATH, v, v_colon, cpu_arch); |
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390 Arguments::set_library_path(ld_library_path); |
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391 FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
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392 } |
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393 |
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394 // Extensions directories. |
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395 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); |
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396 Arguments::set_ext_dirs(buf); |
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397 |
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398 // Endorsed standards default directory. |
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399 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
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400 Arguments::set_endorsed_dirs(buf); |
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401 |
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402 FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
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403 |
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404 #undef DEFAULT_LIBPATH |
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405 #undef SYS_EXT_DIR |
| 0 | 406 #undef EXTENSIONS_DIR |
| 407 #undef ENDORSED_DIR | |
| 408 } | |
| 409 | |
| 410 //////////////////////////////////////////////////////////////////////////////// | |
| 411 // breakpoint support | |
| 412 | |
| 413 void os::breakpoint() { | |
| 414 BREAKPOINT; | |
| 415 } | |
| 416 | |
| 417 extern "C" void breakpoint() { | |
| 418 // use debugger to set breakpoint here | |
| 419 } | |
| 420 | |
| 421 //////////////////////////////////////////////////////////////////////////////// | |
| 422 // signal support | |
| 423 | |
| 424 debug_only(static bool signal_sets_initialized = false); | |
| 425 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 426 | |
| 427 bool os::Linux::is_sig_ignored(int sig) { | |
| 428 struct sigaction oact; | |
| 429 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 430 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 431 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 432 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 433 return true; | |
| 434 else | |
| 435 return false; | |
| 436 } | |
| 437 | |
| 438 void os::Linux::signal_sets_init() { | |
| 439 // Should also have an assertion stating we are still single-threaded. | |
| 440 assert(!signal_sets_initialized, "Already initialized"); | |
| 441 // Fill in signals that are necessarily unblocked for all threads in | |
| 442 // the VM. Currently, we unblock the following signals: | |
| 443 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 444 // by -Xrs (=ReduceSignalUsage)); | |
| 445 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 446 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 447 // the dispositions or masks wrt these signals. | |
| 448 // Programs embedding the VM that want to use the above signals for their | |
| 449 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 450 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 451 // (See bug 4345157, and other related bugs). | |
| 452 // In reality, though, unblocking these signals is really a nop, since | |
| 453 // these signals are not blocked by default. | |
| 454 sigemptyset(&unblocked_sigs); | |
| 455 sigemptyset(&allowdebug_blocked_sigs); | |
| 456 sigaddset(&unblocked_sigs, SIGILL); | |
| 457 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 458 sigaddset(&unblocked_sigs, SIGBUS); | |
| 459 sigaddset(&unblocked_sigs, SIGFPE); | |
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460 #if defined(PPC64) |
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461 sigaddset(&unblocked_sigs, SIGTRAP); |
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462 #endif |
| 0 | 463 sigaddset(&unblocked_sigs, SR_signum); |
| 464 | |
| 465 if (!ReduceSignalUsage) { | |
| 466 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 467 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 468 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 469 } | |
| 470 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 471 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 472 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 473 } | |
| 474 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 475 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 476 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 477 } | |
| 478 } | |
| 479 // Fill in signals that are blocked by all but the VM thread. | |
| 480 sigemptyset(&vm_sigs); | |
| 481 if (!ReduceSignalUsage) | |
| 482 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 483 debug_only(signal_sets_initialized = true); | |
| 484 | |
| 485 } | |
| 486 | |
| 487 // These are signals that are unblocked while a thread is running Java. | |
| 488 // (For some reason, they get blocked by default.) | |
| 489 sigset_t* os::Linux::unblocked_signals() { | |
| 490 assert(signal_sets_initialized, "Not initialized"); | |
| 491 return &unblocked_sigs; | |
| 492 } | |
| 493 | |
| 494 // These are the signals that are blocked while a (non-VM) thread is | |
| 495 // running Java. Only the VM thread handles these signals. | |
| 496 sigset_t* os::Linux::vm_signals() { | |
| 497 assert(signal_sets_initialized, "Not initialized"); | |
| 498 return &vm_sigs; | |
| 499 } | |
| 500 | |
| 501 // These are signals that are blocked during cond_wait to allow debugger in | |
| 502 sigset_t* os::Linux::allowdebug_blocked_signals() { | |
| 503 assert(signal_sets_initialized, "Not initialized"); | |
| 504 return &allowdebug_blocked_sigs; | |
| 505 } | |
| 506 | |
| 507 void os::Linux::hotspot_sigmask(Thread* thread) { | |
| 508 | |
| 509 //Save caller's signal mask before setting VM signal mask | |
| 510 sigset_t caller_sigmask; | |
| 511 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); | |
| 512 | |
| 513 OSThread* osthread = thread->osthread(); | |
| 514 osthread->set_caller_sigmask(caller_sigmask); | |
| 515 | |
| 516 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); | |
| 517 | |
| 518 if (!ReduceSignalUsage) { | |
| 519 if (thread->is_VM_thread()) { | |
| 520 // Only the VM thread handles BREAK_SIGNAL ... | |
| 521 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 522 } else { | |
| 523 // ... all other threads block BREAK_SIGNAL | |
| 524 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); | |
| 525 } | |
| 526 } | |
| 527 } | |
| 528 | |
| 529 ////////////////////////////////////////////////////////////////////////////// | |
| 530 // detecting pthread library | |
| 531 | |
| 532 void os::Linux::libpthread_init() { | |
| 533 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION | |
| 534 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a | |
| 535 // generic name for earlier versions. | |
| 536 // Define macros here so we can build HotSpot on old systems. | |
| 537 # ifndef _CS_GNU_LIBC_VERSION | |
| 538 # define _CS_GNU_LIBC_VERSION 2 | |
| 539 # endif | |
| 540 # ifndef _CS_GNU_LIBPTHREAD_VERSION | |
| 541 # define _CS_GNU_LIBPTHREAD_VERSION 3 | |
| 542 # endif | |
| 543 | |
| 544 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); | |
| 545 if (n > 0) { | |
| 6197 | 546 char *str = (char *)malloc(n, mtInternal); |
| 0 | 547 confstr(_CS_GNU_LIBC_VERSION, str, n); |
| 548 os::Linux::set_glibc_version(str); | |
| 549 } else { | |
| 550 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() | |
| 551 static char _gnu_libc_version[32]; | |
| 552 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), | |
| 553 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); | |
| 554 os::Linux::set_glibc_version(_gnu_libc_version); | |
| 555 } | |
| 556 | |
| 557 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); | |
| 558 if (n > 0) { | |
| 6197 | 559 char *str = (char *)malloc(n, mtInternal); |
| 0 | 560 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); |
| 561 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells | |
| 562 // us "NPTL-0.29" even we are running with LinuxThreads. Check if this | |
|
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563 // is the case. LinuxThreads has a hard limit on max number of threads. |
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564 // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value. |
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565 // On the other hand, NPTL does not have such a limit, sysconf() |
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566 // will return -1 and errno is not changed. Check if it is really NPTL. |
| 0 | 567 if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 && |
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568 strstr(str, "NPTL") && |
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569 sysconf(_SC_THREAD_THREADS_MAX) > 0) { |
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570 free(str); |
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571 os::Linux::set_libpthread_version("linuxthreads"); |
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572 } else { |
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573 os::Linux::set_libpthread_version(str); |
| 0 | 574 } |
| 575 } else { | |
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576 // glibc before 2.3.2 only has LinuxThreads. |
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577 os::Linux::set_libpthread_version("linuxthreads"); |
| 0 | 578 } |
| 579 | |
| 580 if (strstr(libpthread_version(), "NPTL")) { | |
| 581 os::Linux::set_is_NPTL(); | |
| 582 } else { | |
| 583 os::Linux::set_is_LinuxThreads(); | |
| 584 } | |
| 585 | |
| 586 // LinuxThreads have two flavors: floating-stack mode, which allows variable | |
| 587 // stack size; and fixed-stack mode. NPTL is always floating-stack. | |
| 588 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { | |
| 589 os::Linux::set_is_floating_stack(); | |
| 590 } | |
| 591 } | |
| 592 | |
| 593 ///////////////////////////////////////////////////////////////////////////// | |
| 594 // thread stack | |
| 595 | |
| 596 // Force Linux kernel to expand current thread stack. If "bottom" is close | |
| 597 // to the stack guard, caller should block all signals. | |
| 598 // | |
| 599 // MAP_GROWSDOWN: | |
| 600 // A special mmap() flag that is used to implement thread stacks. It tells | |
| 601 // kernel that the memory region should extend downwards when needed. This | |
| 602 // allows early versions of LinuxThreads to only mmap the first few pages | |
| 603 // when creating a new thread. Linux kernel will automatically expand thread | |
| 604 // stack as needed (on page faults). | |
| 605 // | |
| 606 // However, because the memory region of a MAP_GROWSDOWN stack can grow on | |
| 607 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN | |
| 608 // region, it's hard to tell if the fault is due to a legitimate stack | |
| 609 // access or because of reading/writing non-exist memory (e.g. buffer | |
| 610 // overrun). As a rule, if the fault happens below current stack pointer, | |
| 611 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the | |
| 612 // application (see Linux kernel fault.c). | |
| 613 // | |
| 614 // This Linux feature can cause SIGSEGV when VM bangs thread stack for | |
| 615 // stack overflow detection. | |
| 616 // | |
| 617 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do | |
| 618 // not use this flag. However, the stack of initial thread is not created | |
| 619 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though | |
| 620 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack | |
| 621 // and then attach the thread to JVM. | |
| 622 // | |
| 623 // To get around the problem and allow stack banging on Linux, we need to | |
| 624 // manually expand thread stack after receiving the SIGSEGV. | |
| 625 // | |
| 626 // There are two ways to expand thread stack to address "bottom", we used | |
| 627 // both of them in JVM before 1.5: | |
| 628 // 1. adjust stack pointer first so that it is below "bottom", and then | |
| 629 // touch "bottom" | |
| 630 // 2. mmap() the page in question | |
| 631 // | |
| 632 // Now alternate signal stack is gone, it's harder to use 2. For instance, | |
| 633 // if current sp is already near the lower end of page 101, and we need to | |
| 634 // call mmap() to map page 100, it is possible that part of the mmap() frame | |
| 635 // will be placed in page 100. When page 100 is mapped, it is zero-filled. | |
| 636 // That will destroy the mmap() frame and cause VM to crash. | |
| 637 // | |
| 638 // The following code works by adjusting sp first, then accessing the "bottom" | |
| 639 // page to force a page fault. Linux kernel will then automatically expand the | |
| 640 // stack mapping. | |
| 641 // | |
| 642 // _expand_stack_to() assumes its frame size is less than page size, which | |
| 643 // should always be true if the function is not inlined. | |
| 644 | |
| 645 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute | |
| 646 #define NOINLINE | |
| 647 #else | |
| 648 #define NOINLINE __attribute__ ((noinline)) | |
| 649 #endif | |
| 650 | |
| 651 static void _expand_stack_to(address bottom) NOINLINE; | |
| 652 | |
| 653 static void _expand_stack_to(address bottom) { | |
| 654 address sp; | |
| 655 size_t size; | |
| 656 volatile char *p; | |
| 657 | |
| 658 // Adjust bottom to point to the largest address within the same page, it | |
| 659 // gives us a one-page buffer if alloca() allocates slightly more memory. | |
| 660 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); | |
| 661 bottom += os::Linux::page_size() - 1; | |
| 662 | |
| 663 // sp might be slightly above current stack pointer; if that's the case, we | |
| 664 // will alloca() a little more space than necessary, which is OK. Don't use | |
| 665 // os::current_stack_pointer(), as its result can be slightly below current | |
| 666 // stack pointer, causing us to not alloca enough to reach "bottom". | |
| 667 sp = (address)&sp; | |
| 668 | |
| 669 if (sp > bottom) { | |
| 670 size = sp - bottom; | |
| 671 p = (volatile char *)alloca(size); | |
| 672 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); | |
| 673 p[0] = '\0'; | |
| 674 } | |
| 675 } | |
| 676 | |
| 677 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { | |
| 678 assert(t!=NULL, "just checking"); | |
| 679 assert(t->osthread()->expanding_stack(), "expand should be set"); | |
| 680 assert(t->stack_base() != NULL, "stack_base was not initialized"); | |
| 681 | |
| 682 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { | |
| 683 sigset_t mask_all, old_sigset; | |
| 684 sigfillset(&mask_all); | |
| 685 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); | |
| 686 _expand_stack_to(addr); | |
| 687 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); | |
| 688 return true; | |
| 689 } | |
| 690 return false; | |
| 691 } | |
| 692 | |
| 693 ////////////////////////////////////////////////////////////////////////////// | |
| 694 // create new thread | |
| 695 | |
| 696 static address highest_vm_reserved_address(); | |
| 697 | |
| 698 // check if it's safe to start a new thread | |
| 699 static bool _thread_safety_check(Thread* thread) { | |
| 700 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { | |
| 701 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) | |
| 702 // Heap is mmap'ed at lower end of memory space. Thread stacks are | |
| 703 // allocated (MAP_FIXED) from high address space. Every thread stack | |
| 704 // occupies a fixed size slot (usually 2Mbytes, but user can change | |
| 705 // it to other values if they rebuild LinuxThreads). | |
| 706 // | |
| 707 // Problem with MAP_FIXED is that mmap() can still succeed even part of | |
| 708 // the memory region has already been mmap'ed. That means if we have too | |
| 709 // many threads and/or very large heap, eventually thread stack will | |
| 710 // collide with heap. | |
| 711 // | |
| 712 // Here we try to prevent heap/stack collision by comparing current | |
| 713 // stack bottom with the highest address that has been mmap'ed by JVM | |
| 714 // plus a safety margin for memory maps created by native code. | |
| 715 // | |
| 716 // This feature can be disabled by setting ThreadSafetyMargin to 0 | |
| 717 // | |
| 718 if (ThreadSafetyMargin > 0) { | |
| 719 address stack_bottom = os::current_stack_base() - os::current_stack_size(); | |
| 720 | |
| 721 // not safe if our stack extends below the safety margin | |
| 722 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); | |
| 723 } else { | |
| 724 return true; | |
| 725 } | |
| 726 } else { | |
| 727 // Floating stack LinuxThreads or NPTL: | |
| 728 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When | |
| 729 // there's not enough space left, pthread_create() will fail. If we come | |
| 730 // here, that means enough space has been reserved for stack. | |
| 731 return true; | |
| 732 } | |
| 733 } | |
| 734 | |
| 735 // Thread start routine for all newly created threads | |
| 736 static void *java_start(Thread *thread) { | |
| 737 // Try to randomize the cache line index of hot stack frames. | |
| 738 // This helps when threads of the same stack traces evict each other's | |
| 739 // cache lines. The threads can be either from the same JVM instance, or | |
| 740 // from different JVM instances. The benefit is especially true for | |
| 741 // processors with hyperthreading technology. | |
| 742 static int counter = 0; | |
| 743 int pid = os::current_process_id(); | |
| 744 alloca(((pid ^ counter++) & 7) * 128); | |
| 745 | |
| 746 ThreadLocalStorage::set_thread(thread); | |
| 747 | |
| 748 OSThread* osthread = thread->osthread(); | |
| 749 Monitor* sync = osthread->startThread_lock(); | |
| 750 | |
| 751 // non floating stack LinuxThreads needs extra check, see above | |
| 752 if (!_thread_safety_check(thread)) { | |
| 753 // notify parent thread | |
| 754 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 755 osthread->set_state(ZOMBIE); | |
| 756 sync->notify_all(); | |
| 757 return NULL; | |
| 758 } | |
| 759 | |
| 760 // thread_id is kernel thread id (similar to Solaris LWP id) | |
| 761 osthread->set_thread_id(os::Linux::gettid()); | |
| 762 | |
| 763 if (UseNUMA) { | |
| 764 int lgrp_id = os::numa_get_group_id(); | |
| 765 if (lgrp_id != -1) { | |
| 766 thread->set_lgrp_id(lgrp_id); | |
| 767 } | |
| 768 } | |
| 769 // initialize signal mask for this thread | |
| 770 os::Linux::hotspot_sigmask(thread); | |
| 771 | |
| 772 // initialize floating point control register | |
| 773 os::Linux::init_thread_fpu_state(); | |
| 774 | |
| 775 // handshaking with parent thread | |
| 776 { | |
| 777 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 778 | |
| 779 // notify parent thread | |
| 780 osthread->set_state(INITIALIZED); | |
| 781 sync->notify_all(); | |
| 782 | |
| 783 // wait until os::start_thread() | |
| 784 while (osthread->get_state() == INITIALIZED) { | |
| 785 sync->wait(Mutex::_no_safepoint_check_flag); | |
| 786 } | |
| 787 } | |
| 788 | |
| 789 // call one more level start routine | |
| 790 thread->run(); | |
| 791 | |
| 792 return 0; | |
| 793 } | |
| 794 | |
| 795 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 796 assert(thread->osthread() == NULL, "caller responsible"); | |
| 797 | |
| 798 // Allocate the OSThread object | |
| 799 OSThread* osthread = new OSThread(NULL, NULL); | |
| 800 if (osthread == NULL) { | |
| 801 return false; | |
| 802 } | |
| 803 | |
| 804 // set the correct thread state | |
| 805 osthread->set_thread_type(thr_type); | |
| 806 | |
| 807 // Initial state is ALLOCATED but not INITIALIZED | |
| 808 osthread->set_state(ALLOCATED); | |
| 809 | |
| 810 thread->set_osthread(osthread); | |
| 811 | |
| 812 // init thread attributes | |
| 813 pthread_attr_t attr; | |
| 814 pthread_attr_init(&attr); | |
| 815 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
| 816 | |
| 817 // stack size | |
| 818 if (os::Linux::supports_variable_stack_size()) { | |
| 819 // calculate stack size if it's not specified by caller | |
| 820 if (stack_size == 0) { | |
| 821 stack_size = os::Linux::default_stack_size(thr_type); | |
| 822 | |
| 823 switch (thr_type) { | |
| 824 case os::java_thread: | |
|
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825 // Java threads use ThreadStackSize which default value can be |
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826 // changed with the flag -Xss |
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827 assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
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828 stack_size = JavaThread::stack_size_at_create(); |
| 0 | 829 break; |
| 830 case os::compiler_thread: | |
| 831 if (CompilerThreadStackSize > 0) { | |
| 832 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 833 break; | |
| 834 } // else fall through: | |
| 835 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 836 case os::vm_thread: | |
| 837 case os::pgc_thread: | |
| 838 case os::cgc_thread: | |
| 839 case os::watcher_thread: | |
| 840 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 841 break; | |
| 842 } | |
| 843 } | |
| 844 | |
| 845 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); | |
| 846 pthread_attr_setstacksize(&attr, stack_size); | |
| 847 } else { | |
| 848 // let pthread_create() pick the default value. | |
| 849 } | |
| 850 | |
| 851 // glibc guard page | |
| 852 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); | |
| 853 | |
| 854 ThreadState state; | |
| 855 | |
| 856 { | |
| 857 // Serialize thread creation if we are running with fixed stack LinuxThreads | |
| 858 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); | |
| 859 if (lock) { | |
| 860 os::Linux::createThread_lock()->lock_without_safepoint_check(); | |
| 861 } | |
| 862 | |
| 863 pthread_t tid; | |
| 864 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); | |
| 865 | |
| 866 pthread_attr_destroy(&attr); | |
| 867 | |
| 868 if (ret != 0) { | |
| 869 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 870 perror("pthread_create()"); | |
| 871 } | |
| 872 // Need to clean up stuff we've allocated so far | |
| 873 thread->set_osthread(NULL); | |
| 874 delete osthread; | |
| 875 if (lock) os::Linux::createThread_lock()->unlock(); | |
| 876 return false; | |
| 877 } | |
| 878 | |
| 879 // Store pthread info into the OSThread | |
| 880 osthread->set_pthread_id(tid); | |
| 881 | |
| 882 // Wait until child thread is either initialized or aborted | |
| 883 { | |
| 884 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 885 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 886 while ((state = osthread->get_state()) == ALLOCATED) { | |
| 887 sync_with_child->wait(Mutex::_no_safepoint_check_flag); | |
| 888 } | |
| 889 } | |
| 890 | |
| 891 if (lock) { | |
| 892 os::Linux::createThread_lock()->unlock(); | |
| 893 } | |
| 894 } | |
| 895 | |
| 896 // Aborted due to thread limit being reached | |
| 897 if (state == ZOMBIE) { | |
| 898 thread->set_osthread(NULL); | |
| 899 delete osthread; | |
| 900 return false; | |
| 901 } | |
| 902 | |
| 903 // The thread is returned suspended (in state INITIALIZED), | |
| 904 // and is started higher up in the call chain | |
| 905 assert(state == INITIALIZED, "race condition"); | |
| 906 return true; | |
| 907 } | |
| 908 | |
| 909 ///////////////////////////////////////////////////////////////////////////// | |
| 910 // attach existing thread | |
| 911 | |
| 912 // bootstrap the main thread | |
| 913 bool os::create_main_thread(JavaThread* thread) { | |
| 914 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); | |
| 915 return create_attached_thread(thread); | |
| 916 } | |
| 917 | |
| 918 bool os::create_attached_thread(JavaThread* thread) { | |
| 919 #ifdef ASSERT | |
| 920 thread->verify_not_published(); | |
| 921 #endif | |
| 922 | |
| 923 // Allocate the OSThread object | |
| 924 OSThread* osthread = new OSThread(NULL, NULL); | |
| 925 | |
| 926 if (osthread == NULL) { | |
| 927 return false; | |
| 928 } | |
| 929 | |
| 930 // Store pthread info into the OSThread | |
| 931 osthread->set_thread_id(os::Linux::gettid()); | |
| 932 osthread->set_pthread_id(::pthread_self()); | |
| 933 | |
| 934 // initialize floating point control register | |
| 935 os::Linux::init_thread_fpu_state(); | |
| 936 | |
| 937 // Initial thread state is RUNNABLE | |
| 938 osthread->set_state(RUNNABLE); | |
| 939 | |
| 940 thread->set_osthread(osthread); | |
| 941 | |
| 942 if (UseNUMA) { | |
| 943 int lgrp_id = os::numa_get_group_id(); | |
| 944 if (lgrp_id != -1) { | |
| 945 thread->set_lgrp_id(lgrp_id); | |
| 946 } | |
| 947 } | |
| 948 | |
| 949 if (os::Linux::is_initial_thread()) { | |
| 950 // If current thread is initial thread, its stack is mapped on demand, | |
| 951 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map | |
| 952 // the entire stack region to avoid SEGV in stack banging. | |
| 953 // It is also useful to get around the heap-stack-gap problem on SuSE | |
| 954 // kernel (see 4821821 for details). We first expand stack to the top | |
| 955 // of yellow zone, then enable stack yellow zone (order is significant, | |
| 956 // enabling yellow zone first will crash JVM on SuSE Linux), so there | |
| 957 // is no gap between the last two virtual memory regions. | |
| 958 | |
| 959 JavaThread *jt = (JavaThread *)thread; | |
| 960 address addr = jt->stack_yellow_zone_base(); | |
| 961 assert(addr != NULL, "initialization problem?"); | |
| 962 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); | |
| 963 | |
| 964 osthread->set_expanding_stack(); | |
| 965 os::Linux::manually_expand_stack(jt, addr); | |
| 966 osthread->clear_expanding_stack(); | |
| 967 } | |
| 968 | |
| 969 // initialize signal mask for this thread | |
| 970 // and save the caller's signal mask | |
| 971 os::Linux::hotspot_sigmask(thread); | |
| 972 | |
| 973 return true; | |
| 974 } | |
| 975 | |
| 976 void os::pd_start_thread(Thread* thread) { | |
| 977 OSThread * osthread = thread->osthread(); | |
| 978 assert(osthread->get_state() != INITIALIZED, "just checking"); | |
| 979 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 980 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 981 sync_with_child->notify(); | |
| 982 } | |
| 983 | |
| 984 // Free Linux resources related to the OSThread | |
| 985 void os::free_thread(OSThread* osthread) { | |
| 986 assert(osthread != NULL, "osthread not set"); | |
| 987 | |
| 988 if (Thread::current()->osthread() == osthread) { | |
| 989 // Restore caller's signal mask | |
| 990 sigset_t sigmask = osthread->caller_sigmask(); | |
| 991 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); | |
| 992 } | |
| 993 | |
| 994 delete osthread; | |
| 995 } | |
| 996 | |
| 997 ////////////////////////////////////////////////////////////////////////////// | |
| 998 // thread local storage | |
| 999 | |
|
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1000 // Restore the thread pointer if the destructor is called. This is in case |
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1001 // someone from JNI code sets up a destructor with pthread_key_create to run |
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1002 // detachCurrentThread on thread death. Unless we restore the thread pointer we |
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1003 // will hang or crash. When detachCurrentThread is called the key will be set |
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1004 // to null and we will not be called again. If detachCurrentThread is never |
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1005 // called we could loop forever depending on the pthread implementation. |
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1006 static void restore_thread_pointer(void* p) { |
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1007 Thread* thread = (Thread*) p; |
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1008 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); |
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1009 } |
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1010 |
| 0 | 1011 int os::allocate_thread_local_storage() { |
| 1012 pthread_key_t key; | |
|
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1013 int rslt = pthread_key_create(&key, restore_thread_pointer); |
| 0 | 1014 assert(rslt == 0, "cannot allocate thread local storage"); |
| 1015 return (int)key; | |
| 1016 } | |
| 1017 | |
| 1018 // Note: This is currently not used by VM, as we don't destroy TLS key | |
| 1019 // on VM exit. | |
| 1020 void os::free_thread_local_storage(int index) { | |
| 1021 int rslt = pthread_key_delete((pthread_key_t)index); | |
| 1022 assert(rslt == 0, "invalid index"); | |
| 1023 } | |
| 1024 | |
| 1025 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1026 int rslt = pthread_setspecific((pthread_key_t)index, value); | |
| 1027 assert(rslt == 0, "pthread_setspecific failed"); | |
| 1028 } | |
| 1029 | |
| 1030 extern "C" Thread* get_thread() { | |
| 1031 return ThreadLocalStorage::thread(); | |
| 1032 } | |
| 1033 | |
| 1034 ////////////////////////////////////////////////////////////////////////////// | |
| 1035 // initial thread | |
| 1036 | |
| 1037 // Check if current thread is the initial thread, similar to Solaris thr_main. | |
| 1038 bool os::Linux::is_initial_thread(void) { | |
| 1039 char dummy; | |
| 1040 // If called before init complete, thread stack bottom will be null. | |
| 1041 // Can be called if fatal error occurs before initialization. | |
| 1042 if (initial_thread_stack_bottom() == NULL) return false; | |
| 1043 assert(initial_thread_stack_bottom() != NULL && | |
| 1044 initial_thread_stack_size() != 0, | |
| 1045 "os::init did not locate initial thread's stack region"); | |
| 1046 if ((address)&dummy >= initial_thread_stack_bottom() && | |
| 1047 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) | |
| 1048 return true; | |
| 1049 else return false; | |
| 1050 } | |
| 1051 | |
| 1052 // Find the virtual memory area that contains addr | |
| 1053 static bool find_vma(address addr, address* vma_low, address* vma_high) { | |
| 1054 FILE *fp = fopen("/proc/self/maps", "r"); | |
| 1055 if (fp) { | |
| 1056 address low, high; | |
| 1057 while (!feof(fp)) { | |
| 1058 if (fscanf(fp, "%p-%p", &low, &high) == 2) { | |
| 1059 if (low <= addr && addr < high) { | |
| 1060 if (vma_low) *vma_low = low; | |
| 1061 if (vma_high) *vma_high = high; | |
| 1062 fclose (fp); | |
| 1063 return true; | |
| 1064 } | |
| 1065 } | |
| 1066 for (;;) { | |
| 1067 int ch = fgetc(fp); | |
| 1068 if (ch == EOF || ch == (int)'\n') break; | |
| 1069 } | |
| 1070 } | |
| 1071 fclose(fp); | |
| 1072 } | |
| 1073 return false; | |
| 1074 } | |
| 1075 | |
| 1076 // Locate initial thread stack. This special handling of initial thread stack | |
| 1077 // is needed because pthread_getattr_np() on most (all?) Linux distros returns | |
| 24179 | 1078 // bogus value for the primordial process thread. While the launcher has created |
| 1079 // the VM in a new thread since JDK 6, we still have to allow for the use of the | |
| 1080 // JNI invocation API from a primordial thread. | |
| 0 | 1081 void os::Linux::capture_initial_stack(size_t max_size) { |
| 24179 | 1082 |
| 1083 // max_size is either 0 (which means accept OS default for thread stacks) or | |
| 1084 // a user-specified value known to be at least the minimum needed. If we | |
| 1085 // are actually on the primordial thread we can make it appear that we have a | |
| 1086 // smaller max_size stack by inserting the guard pages at that location. But we | |
| 1087 // cannot do anything to emulate a larger stack than what has been provided by | |
| 1088 // the OS or threading library. In fact if we try to use a stack greater than | |
| 1089 // what is set by rlimit then we will crash the hosting process. | |
| 1090 | |
| 1091 // Maximum stack size is the easy part, get it from RLIMIT_STACK. | |
| 1092 // If this is "unlimited" then it will be a huge value. | |
| 0 | 1093 struct rlimit rlim; |
| 1094 getrlimit(RLIMIT_STACK, &rlim); | |
| 24179 | 1095 size_t stack_size = rlim.rlim_cur; |
| 0 | 1096 |
| 1097 // 6308388: a bug in ld.so will relocate its own .data section to the | |
| 1098 // lower end of primordial stack; reduce ulimit -s value a little bit | |
| 1099 // so we won't install guard page on ld.so's data section. | |
| 1100 stack_size -= 2 * page_size(); | |
| 1101 | |
| 1102 // Try to figure out where the stack base (top) is. This is harder. | |
| 1103 // | |
| 1104 // When an application is started, glibc saves the initial stack pointer in | |
| 1105 // a global variable "__libc_stack_end", which is then used by system | |
| 1106 // libraries. __libc_stack_end should be pretty close to stack top. The | |
| 1107 // variable is available since the very early days. However, because it is | |
| 1108 // a private interface, it could disappear in the future. | |
| 1109 // | |
| 1110 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar | |
| 1111 // to __libc_stack_end, it is very close to stack top, but isn't the real | |
| 1112 // stack top. Note that /proc may not exist if VM is running as a chroot | |
| 1113 // program, so reading /proc/<pid>/stat could fail. Also the contents of | |
| 1114 // /proc/<pid>/stat could change in the future (though unlikely). | |
| 1115 // | |
| 1116 // We try __libc_stack_end first. If that doesn't work, look for | |
| 1117 // /proc/<pid>/stat. If neither of them works, we use current stack pointer | |
| 1118 // as a hint, which should work well in most cases. | |
| 1119 | |
| 1120 uintptr_t stack_start; | |
| 1121 | |
| 1122 // try __libc_stack_end first | |
| 1123 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); | |
| 1124 if (p && *p) { | |
| 1125 stack_start = *p; | |
| 1126 } else { | |
| 1127 // see if we can get the start_stack field from /proc/self/stat | |
| 1128 FILE *fp; | |
| 1129 int pid; | |
| 1130 char state; | |
| 1131 int ppid; | |
| 1132 int pgrp; | |
| 1133 int session; | |
| 1134 int nr; | |
| 1135 int tpgrp; | |
| 1136 unsigned long flags; | |
| 1137 unsigned long minflt; | |
| 1138 unsigned long cminflt; | |
| 1139 unsigned long majflt; | |
| 1140 unsigned long cmajflt; | |
| 1141 unsigned long utime; | |
| 1142 unsigned long stime; | |
| 1143 long cutime; | |
| 1144 long cstime; | |
| 1145 long prio; | |
| 1146 long nice; | |
| 1147 long junk; | |
| 1148 long it_real; | |
| 1149 uintptr_t start; | |
| 1150 uintptr_t vsize; | |
|
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1151 intptr_t rss; |
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1152 uintptr_t rsslim; |
| 0 | 1153 uintptr_t scodes; |
| 1154 uintptr_t ecode; | |
| 1155 int i; | |
| 1156 | |
| 1157 // Figure what the primordial thread stack base is. Code is inspired | |
| 1158 // by email from Hans Boehm. /proc/self/stat begins with current pid, | |
| 1159 // followed by command name surrounded by parentheses, state, etc. | |
| 1160 char stat[2048]; | |
| 1161 int statlen; | |
| 1162 | |
| 1163 fp = fopen("/proc/self/stat", "r"); | |
| 1164 if (fp) { | |
| 1165 statlen = fread(stat, 1, 2047, fp); | |
| 1166 stat[statlen] = '\0'; | |
| 1167 fclose(fp); | |
| 1168 | |
| 1169 // Skip pid and the command string. Note that we could be dealing with | |
| 1170 // weird command names, e.g. user could decide to rename java launcher | |
| 1171 // to "java 1.4.2 :)", then the stat file would look like | |
| 1172 // 1234 (java 1.4.2 :)) R ... ... | |
| 1173 // We don't really need to know the command string, just find the last | |
| 1174 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 1175 char * s = strrchr(stat, ')'); | |
| 1176 | |
| 1177 i = 0; | |
| 1178 if (s) { | |
| 1179 // Skip blank chars | |
| 1180 do s++; while (isspace(*s)); | |
| 1181 | |
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1182 #define _UFM UINTX_FORMAT |
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1183 #define _DFM INTX_FORMAT |
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1184 |
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1185 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */ |
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1186 /* 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 */ |
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1187 i = sscanf(s, "%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld " _UFM _UFM _DFM _UFM _UFM _UFM _UFM, |
| 0 | 1188 &state, /* 3 %c */ |
| 1189 &ppid, /* 4 %d */ | |
| 1190 &pgrp, /* 5 %d */ | |
| 1191 &session, /* 6 %d */ | |
| 1192 &nr, /* 7 %d */ | |
| 1193 &tpgrp, /* 8 %d */ | |
| 1194 &flags, /* 9 %lu */ | |
| 1195 &minflt, /* 10 %lu */ | |
| 1196 &cminflt, /* 11 %lu */ | |
| 1197 &majflt, /* 12 %lu */ | |
| 1198 &cmajflt, /* 13 %lu */ | |
| 1199 &utime, /* 14 %lu */ | |
| 1200 &stime, /* 15 %lu */ | |
| 1201 &cutime, /* 16 %ld */ | |
| 1202 &cstime, /* 17 %ld */ | |
| 1203 &prio, /* 18 %ld */ | |
| 1204 &nice, /* 19 %ld */ | |
| 1205 &junk, /* 20 %ld */ | |
| 1206 &it_real, /* 21 %ld */ | |
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1207 &start, /* 22 UINTX_FORMAT */ |
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1208 &vsize, /* 23 UINTX_FORMAT */ |
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1209 &rss, /* 24 INTX_FORMAT */ |
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1210 &rsslim, /* 25 UINTX_FORMAT */ |
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1211 &scodes, /* 26 UINTX_FORMAT */ |
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1212 &ecode, /* 27 UINTX_FORMAT */ |
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1213 &stack_start); /* 28 UINTX_FORMAT */ |
| 0 | 1214 } |
| 1215 | |
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1216 #undef _UFM |
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1217 #undef _DFM |
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1218 |
| 0 | 1219 if (i != 28 - 2) { |
| 1220 assert(false, "Bad conversion from /proc/self/stat"); | |
| 1221 // product mode - assume we are the initial thread, good luck in the | |
| 1222 // embedded case. | |
| 1223 warning("Can't detect initial thread stack location - bad conversion"); | |
| 1224 stack_start = (uintptr_t) &rlim; | |
| 1225 } | |
| 1226 } else { | |
| 1227 // For some reason we can't open /proc/self/stat (for example, running on | |
| 1228 // FreeBSD with a Linux emulator, or inside chroot), this should work for | |
| 1229 // most cases, so don't abort: | |
| 1230 warning("Can't detect initial thread stack location - no /proc/self/stat"); | |
| 1231 stack_start = (uintptr_t) &rlim; | |
| 1232 } | |
| 1233 } | |
| 1234 | |
| 1235 // Now we have a pointer (stack_start) very close to the stack top, the | |
| 1236 // next thing to do is to figure out the exact location of stack top. We | |
| 1237 // can find out the virtual memory area that contains stack_start by | |
| 1238 // reading /proc/self/maps, it should be the last vma in /proc/self/maps, | |
| 1239 // and its upper limit is the real stack top. (again, this would fail if | |
| 1240 // running inside chroot, because /proc may not exist.) | |
| 1241 | |
| 1242 uintptr_t stack_top; | |
| 1243 address low, high; | |
| 1244 if (find_vma((address)stack_start, &low, &high)) { | |
| 1245 // success, "high" is the true stack top. (ignore "low", because initial | |
| 1246 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) | |
| 1247 stack_top = (uintptr_t)high; | |
| 1248 } else { | |
| 1249 // failed, likely because /proc/self/maps does not exist | |
| 1250 warning("Can't detect initial thread stack location - find_vma failed"); | |
| 1251 // best effort: stack_start is normally within a few pages below the real | |
| 1252 // stack top, use it as stack top, and reduce stack size so we won't put | |
| 1253 // guard page outside stack. | |
| 1254 stack_top = stack_start; | |
| 1255 stack_size -= 16 * page_size(); | |
| 1256 } | |
| 1257 | |
| 1258 // stack_top could be partially down the page so align it | |
| 1259 stack_top = align_size_up(stack_top, page_size()); | |
| 1260 | |
| 24179 | 1261 // Allowed stack value is minimum of max_size and what we derived from rlimit |
| 1262 if (max_size > 0) { | |
| 1263 _initial_thread_stack_size = MIN2(max_size, stack_size); | |
| 0 | 1264 } else { |
| 24179 | 1265 // Accept the rlimit max, but if stack is unlimited then it will be huge, so |
| 1266 // clamp it at 8MB as we do on Solaris | |
| 1267 _initial_thread_stack_size = MIN2(stack_size, 8*M); | |
| 0 | 1268 } |
| 1269 | |
| 1270 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); | |
| 1271 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; | |
| 24179 | 1272 assert(_initial_thread_stack_bottom < (address)stack_top, "overflow!"); |
| 0 | 1273 } |
| 1274 | |
| 1275 //////////////////////////////////////////////////////////////////////////////// | |
| 1276 // time support | |
| 1277 | |
| 1278 // Time since start-up in seconds to a fine granularity. | |
| 1279 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1280 double os::elapsedTime() { | |
| 1281 | |
|
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1282 return ((double)os::elapsed_counter()) / os::elapsed_frequency(); // nanosecond resolution |
| 0 | 1283 } |
| 1284 | |
| 1285 jlong os::elapsed_counter() { | |
|
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1286 return javaTimeNanos() - initial_time_count; |
| 0 | 1287 } |
| 1288 | |
| 1289 jlong os::elapsed_frequency() { | |
|
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1290 return NANOSECS_PER_SEC; // nanosecond resolution |
| 0 | 1291 } |
| 1292 | |
|
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1293 bool os::supports_vtime() { return true; } |
|
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1294 bool os::enable_vtime() { return false; } |
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1295 bool os::vtime_enabled() { return false; } |
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1296 |
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1297 double os::elapsedVTime() { |
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1298 struct rusage usage; |
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1299 int retval = getrusage(RUSAGE_THREAD, &usage); |
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1300 if (retval == 0) { |
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1301 return (double) (usage.ru_utime.tv_sec + usage.ru_stime.tv_sec) + (double) (usage.ru_utime.tv_usec + usage.ru_stime.tv_usec) / (1000 * 1000); |
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1302 } else { |
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1303 // better than nothing, but not much |
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|
1304 return elapsedTime(); |
|
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|
1305 } |
|
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|
1306 } |
|
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|
1307 |
| 61 | 1308 jlong os::javaTimeMillis() { |
| 0 | 1309 timeval time; |
| 1310 int status = gettimeofday(&time, NULL); | |
| 1311 assert(status != -1, "linux error"); | |
| 1312 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); | |
| 1313 } | |
| 1314 | |
| 1315 #ifndef CLOCK_MONOTONIC | |
| 1316 #define CLOCK_MONOTONIC (1) | |
| 1317 #endif | |
| 1318 | |
| 1319 void os::Linux::clock_init() { | |
| 1320 // we do dlopen's in this particular order due to bug in linux | |
| 1321 // dynamical loader (see 6348968) leading to crash on exit | |
| 1322 void* handle = dlopen("librt.so.1", RTLD_LAZY); | |
| 1323 if (handle == NULL) { | |
| 1324 handle = dlopen("librt.so", RTLD_LAZY); | |
| 1325 } | |
| 1326 | |
| 1327 if (handle) { | |
| 1328 int (*clock_getres_func)(clockid_t, struct timespec*) = | |
| 1329 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); | |
| 1330 int (*clock_gettime_func)(clockid_t, struct timespec*) = | |
| 1331 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); | |
| 1332 if (clock_getres_func && clock_gettime_func) { | |
| 1333 // See if monotonic clock is supported by the kernel. Note that some | |
| 1334 // early implementations simply return kernel jiffies (updated every | |
| 1335 // 1/100 or 1/1000 second). It would be bad to use such a low res clock | |
| 1336 // for nano time (though the monotonic property is still nice to have). | |
| 1337 // It's fixed in newer kernels, however clock_getres() still returns | |
| 1338 // 1/HZ. We check if clock_getres() works, but will ignore its reported | |
| 1339 // resolution for now. Hopefully as people move to new kernels, this | |
| 1340 // won't be a problem. | |
| 1341 struct timespec res; | |
| 1342 struct timespec tp; | |
| 1343 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && | |
| 1344 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { | |
| 1345 // yes, monotonic clock is supported | |
| 1346 _clock_gettime = clock_gettime_func; | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
1347 return; |
| 0 | 1348 } else { |
| 1349 // close librt if there is no monotonic clock | |
| 1350 dlclose(handle); | |
| 1351 } | |
| 1352 } | |
| 1353 } | |
|
12211
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6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
1354 warning("No monotonic clock was available - timed services may " \ |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
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|
1355 "be adversely affected if the time-of-day clock changes"); |
| 0 | 1356 } |
| 1357 | |
| 1358 #ifndef SYS_clock_getres | |
| 1359 | |
| 1360 #if defined(IA32) || defined(AMD64) | |
| 1361 #define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229) | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1362 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1363 #else |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1364 #warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time" |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
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|
1365 #define sys_clock_getres(x,y) -1 |
| 0 | 1366 #endif |
| 1367 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1642
diff
changeset
|
1368 #else |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1642
diff
changeset
|
1369 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1370 #endif |
| 1371 | |
| 1372 void os::Linux::fast_thread_clock_init() { | |
| 1373 if (!UseLinuxPosixThreadCPUClocks) { | |
| 1374 return; | |
| 1375 } | |
| 1376 clockid_t clockid; | |
| 1377 struct timespec tp; | |
| 1378 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = | |
| 1379 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); | |
| 1380 | |
| 1381 // Switch to using fast clocks for thread cpu time if | |
| 1382 // the sys_clock_getres() returns 0 error code. | |
| 1383 // Note, that some kernels may support the current thread | |
| 1384 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks | |
| 1385 // returned by the pthread_getcpuclockid(). | |
| 1386 // If the fast Posix clocks are supported then the sys_clock_getres() | |
| 1387 // must return at least tp.tv_sec == 0 which means a resolution | |
| 1388 // better than 1 sec. This is extra check for reliability. | |
| 1389 | |
| 1390 if(pthread_getcpuclockid_func && | |
| 1391 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && | |
| 1392 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { | |
| 1393 | |
| 1394 _supports_fast_thread_cpu_time = true; | |
| 1395 _pthread_getcpuclockid = pthread_getcpuclockid_func; | |
| 1396 } | |
| 1397 } | |
| 1398 | |
| 1399 jlong os::javaTimeNanos() { | |
| 1400 if (Linux::supports_monotonic_clock()) { | |
| 1401 struct timespec tp; | |
| 1402 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); | |
| 1403 assert(status == 0, "gettime error"); | |
| 1404 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); | |
| 1405 return result; | |
| 1406 } else { | |
| 1407 timeval time; | |
| 1408 int status = gettimeofday(&time, NULL); | |
| 1409 assert(status != -1, "linux error"); | |
| 1410 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); | |
| 1411 return 1000 * usecs; | |
| 1412 } | |
| 1413 } | |
| 1414 | |
| 1415 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1416 if (Linux::supports_monotonic_clock()) { | |
| 1417 info_ptr->max_value = ALL_64_BITS; | |
| 1418 | |
| 1419 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past | |
| 1420 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1421 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1422 } else { | |
| 1423 // gettimeofday - based on time in seconds since the Epoch thus does not wrap | |
| 1424 info_ptr->max_value = ALL_64_BITS; | |
| 1425 | |
| 1426 // gettimeofday is a real time clock so it skips | |
| 1427 info_ptr->may_skip_backward = true; | |
| 1428 info_ptr->may_skip_forward = true; | |
| 1429 } | |
| 1430 | |
| 1431 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1432 } | |
| 1433 | |
| 1434 // Return the real, user, and system times in seconds from an | |
| 1435 // arbitrary fixed point in the past. | |
| 1436 bool os::getTimesSecs(double* process_real_time, | |
| 1437 double* process_user_time, | |
| 1438 double* process_system_time) { | |
| 1439 struct tms ticks; | |
| 1440 clock_t real_ticks = times(&ticks); | |
| 1441 | |
| 1442 if (real_ticks == (clock_t) (-1)) { | |
| 1443 return false; | |
| 1444 } else { | |
| 1445 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1446 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1447 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1448 *process_real_time = ((double) real_ticks) / ticks_per_second; | |
| 1449 | |
| 1450 return true; | |
| 1451 } | |
| 1452 } | |
| 1453 | |
| 1454 | |
| 1455 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1456 struct tm t; | |
| 1457 time_t long_time; | |
| 1458 time(&long_time); | |
| 1459 localtime_r(&long_time, &t); | |
| 1460 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1461 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1462 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1463 return buf; | |
| 1464 } | |
| 1465 | |
|
548
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1466 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
|
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1467 return localtime_r(clock, res); |
|
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1468 } |
|
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1469 |
| 0 | 1470 //////////////////////////////////////////////////////////////////////////////// |
| 1471 // runtime exit support | |
| 1472 | |
| 1473 // Note: os::shutdown() might be called very early during initialization, or | |
| 1474 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1475 // sure it is async-safe and can handle partially initialized VM. | |
| 1476 void os::shutdown() { | |
| 1477 | |
| 1478 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1479 perfMemory_exit(); | |
| 1480 | |
| 1481 // needs to remove object in file system | |
| 1482 AttachListener::abort(); | |
| 1483 | |
| 1484 // flush buffered output, finish log files | |
| 1485 ostream_abort(); | |
| 1486 | |
| 1487 // Check for abort hook | |
| 1488 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1489 if (abort_hook != NULL) { | |
| 1490 abort_hook(); | |
| 1491 } | |
| 1492 | |
| 1493 } | |
| 1494 | |
| 1495 // Note: os::abort() might be called very early during initialization, or | |
| 1496 // called from signal handler. Before adding something to os::abort(), make | |
| 1497 // sure it is async-safe and can handle partially initialized VM. | |
| 1498 void os::abort(bool dump_core) { | |
| 1499 os::shutdown(); | |
| 1500 if (dump_core) { | |
| 1501 #ifndef PRODUCT | |
| 1502 fdStream out(defaultStream::output_fd()); | |
| 1503 out.print_raw("Current thread is "); | |
| 1504 char buf[16]; | |
| 1505 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1506 out.print_raw_cr(buf); | |
| 1507 out.print_raw_cr("Dumping core ..."); | |
| 1508 #endif | |
| 1509 ::abort(); // dump core | |
| 1510 } | |
| 1511 | |
| 1512 ::exit(1); | |
| 1513 } | |
| 1514 | |
| 1515 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1516 void os::die() { | |
| 1517 // _exit() on LinuxThreads only kills current thread | |
| 1518 ::abort(); | |
| 1519 } | |
| 1520 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1521 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1522 // This method is a copy of JDK's sysGetLastErrorString |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1523 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1524 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1525 size_t os::lasterror(char *buf, size_t len) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1526 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1527 if (errno == 0) return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1528 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1529 const char *s = ::strerror(errno); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1530 size_t n = ::strlen(s); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1531 if (n >= len) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1532 n = len - 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1533 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1534 ::strncpy(buf, s, n); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1535 buf[n] = '\0'; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1536 return n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1537 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1538 |
| 0 | 1539 intx os::current_thread_id() { return (intx)pthread_self(); } |
| 1540 int os::current_process_id() { | |
| 1541 | |
| 1542 // Under the old linux thread library, linux gives each thread | |
| 1543 // its own process id. Because of this each thread will return | |
| 1544 // a different pid if this method were to return the result | |
| 1545 // of getpid(2). Linux provides no api that returns the pid | |
| 1546 // of the launcher thread for the vm. This implementation | |
| 1547 // returns a unique pid, the pid of the launcher thread | |
| 1548 // that starts the vm 'process'. | |
| 1549 | |
| 1550 // Under the NPTL, getpid() returns the same pid as the | |
| 1551 // launcher thread rather than a unique pid per thread. | |
| 1552 // Use gettid() if you want the old pre NPTL behaviour. | |
| 1553 | |
| 1554 // if you are looking for the result of a call to getpid() that | |
| 1555 // returns a unique pid for the calling thread, then look at the | |
| 1556 // OSThread::thread_id() method in osThread_linux.hpp file | |
| 1557 | |
| 1558 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1559 } | |
| 1560 | |
| 1561 // DLL functions | |
| 1562 | |
| 1563 const char* os::dll_file_extension() { return ".so"; } | |
| 1564 | |
|
2130
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1565 // This must be hard coded because it's the system's temporary |
|
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1566 // directory not the java application's temp directory, ala java.io.tmpdir. |
|
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1567 const char* os::get_temp_directory() { return "/tmp"; } |
| 0 | 1568 |
| 691 | 1569 static bool file_exists(const char* filename) { |
| 1570 struct stat statbuf; | |
| 1571 if (filename == NULL || strlen(filename) == 0) { | |
| 1572 return false; | |
| 1573 } | |
| 1574 return os::stat(filename, &statbuf) == 0; | |
| 1575 } | |
| 1576 | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1577 bool os::dll_build_name(char* buffer, size_t buflen, |
| 691 | 1578 const char* pname, const char* fname) { |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1579 bool retval = false; |
| 691 | 1580 // Copied from libhpi |
| 242 | 1581 const size_t pnamelen = pname ? strlen(pname) : 0; |
| 1582 | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1583 // Return error on buffer overflow. |
| 242 | 1584 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1585 return retval; |
| 242 | 1586 } |
| 1587 | |
| 1588 if (pnamelen == 0) { | |
| 691 | 1589 snprintf(buffer, buflen, "lib%s.so", fname); |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1590 retval = true; |
| 691 | 1591 } else if (strchr(pname, *os::path_separator()) != NULL) { |
| 1592 int n; | |
| 1593 char** pelements = split_path(pname, &n); | |
|
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
8812
diff
changeset
|
1594 if (pelements == NULL) { |
| 9062 | 1595 return false; |
|
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
8812
diff
changeset
|
1596 } |
| 691 | 1597 for (int i = 0 ; i < n ; i++) { |
| 1598 // Really shouldn't be NULL, but check can't hurt | |
| 1599 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
| 1600 continue; // skip the empty path values | |
| 1601 } | |
| 1602 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
| 1603 if (file_exists(buffer)) { | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1604 retval = true; |
| 691 | 1605 break; |
| 1606 } | |
| 1607 } | |
| 1608 // release the storage | |
| 1609 for (int i = 0 ; i < n ; i++) { | |
| 1610 if (pelements[i] != NULL) { | |
| 6197 | 1611 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
| 691 | 1612 } |
| 1613 } | |
| 1614 if (pelements != NULL) { | |
| 6197 | 1615 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
| 691 | 1616 } |
| 242 | 1617 } else { |
| 691 | 1618 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1619 retval = true; |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1620 } |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1621 return retval; |
| 242 | 1622 } |
| 1623 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
1624 // check if addr is inside libjvm.so |
| 0 | 1625 bool os::address_is_in_vm(address addr) { |
| 1626 static address libjvm_base_addr; | |
| 1627 Dl_info dlinfo; | |
| 1628 | |
| 1629 if (libjvm_base_addr == NULL) { | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1630 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1631 libjvm_base_addr = (address)dlinfo.dli_fbase; |
|
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|
1632 } |
| 0 | 1633 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
| 1634 } | |
| 1635 | |
|
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|
1636 if (dladdr((void *)addr, &dlinfo) != 0) { |
| 0 | 1637 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
| 1638 } | |
| 1639 | |
| 1640 return false; | |
| 1641 } | |
| 1642 | |
| 1643 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1644 int buflen, int *offset) { | |
|
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|
1645 // buf is not optional, but offset is optional |
|
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|
1646 assert(buf != NULL, "sanity check"); |
|
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|
1647 |
| 0 | 1648 Dl_info dlinfo; |
| 1649 | |
|
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|
1650 if (dladdr((void*)addr, &dlinfo) != 0) { |
|
59b052799158
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|
1651 // see if we have a matching symbol |
|
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|
1652 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
|
59b052799158
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|
1653 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
|
2022
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|
1654 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
|
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|
1655 } |
|
11092
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|
1656 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
|
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|
1657 return true; |
|
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|
1658 } |
|
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|
1659 // no matching symbol so try for just file info |
|
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|
1660 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
|
59b052799158
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|
1661 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
|
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|
1662 buf, buflen, offset, dlinfo.dli_fname)) { |
|
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|
1663 return true; |
|
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|
1664 } |
|
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|
1665 } |
|
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|
1666 } |
|
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|
1667 |
|
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|
1668 buf[0] = '\0'; |
|
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|
1669 if (offset != NULL) *offset = -1; |
|
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|
1670 return false; |
| 0 | 1671 } |
| 1672 | |
| 1673 struct _address_to_library_name { | |
| 1674 address addr; // input : memory address | |
| 1675 size_t buflen; // size of fname | |
| 1676 char* fname; // output: library name | |
| 1677 address base; // library base addr | |
| 1678 }; | |
| 1679 | |
| 1680 static int address_to_library_name_callback(struct dl_phdr_info *info, | |
| 1681 size_t size, void *data) { | |
| 1682 int i; | |
| 1683 bool found = false; | |
| 1684 address libbase = NULL; | |
| 1685 struct _address_to_library_name * d = (struct _address_to_library_name *)data; | |
| 1686 | |
| 1687 // iterate through all loadable segments | |
| 1688 for (i = 0; i < info->dlpi_phnum; i++) { | |
| 1689 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); | |
| 1690 if (info->dlpi_phdr[i].p_type == PT_LOAD) { | |
| 1691 // base address of a library is the lowest address of its loaded | |
| 1692 // segments. | |
| 1693 if (libbase == NULL || libbase > segbase) { | |
| 1694 libbase = segbase; | |
| 1695 } | |
| 1696 // see if 'addr' is within current segment | |
| 1697 if (segbase <= d->addr && | |
| 1698 d->addr < segbase + info->dlpi_phdr[i].p_memsz) { | |
| 1699 found = true; | |
| 1700 } | |
| 1701 } | |
| 1702 } | |
| 1703 | |
| 1704 // dlpi_name is NULL or empty if the ELF file is executable, return 0 | |
| 1705 // so dll_address_to_library_name() can fall through to use dladdr() which | |
| 1706 // can figure out executable name from argv[0]. | |
| 1707 if (found && info->dlpi_name && info->dlpi_name[0]) { | |
| 1708 d->base = libbase; | |
| 1709 if (d->fname) { | |
| 1710 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); | |
| 1711 } | |
| 1712 return 1; | |
| 1713 } | |
| 1714 return 0; | |
| 1715 } | |
| 1716 | |
| 1717 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1718 int buflen, int* offset) { | |
|
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|
1719 // buf is not optional, but offset is optional |
|
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|
1720 assert(buf != NULL, "sanity check"); |
|
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|
1721 |
| 0 | 1722 Dl_info dlinfo; |
| 1723 struct _address_to_library_name data; | |
| 1724 | |
| 1725 // There is a bug in old glibc dladdr() implementation that it could resolve | |
| 1726 // to wrong library name if the .so file has a base address != NULL. Here | |
| 1727 // we iterate through the program headers of all loaded libraries to find | |
| 1728 // out which library 'addr' really belongs to. This workaround can be | |
| 1729 // removed once the minimum requirement for glibc is moved to 2.3.x. | |
| 1730 data.addr = addr; | |
| 1731 data.fname = buf; | |
| 1732 data.buflen = buflen; | |
| 1733 data.base = NULL; | |
| 1734 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); | |
| 1735 | |
| 1736 if (rslt) { | |
| 1737 // buf already contains library name | |
| 1738 if (offset) *offset = addr - data.base; | |
| 1739 return true; | |
|
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|
1740 } |
|
59b052799158
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|
1741 if (dladdr((void*)addr, &dlinfo) != 0) { |
|
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|
1742 if (dlinfo.dli_fname != NULL) { |
|
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|
1743 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
|
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|
1744 } |
|
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|
1745 if (dlinfo.dli_fbase != NULL && offset != NULL) { |
|
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|
1746 *offset = addr - (address)dlinfo.dli_fbase; |
|
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|
1747 } |
|
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|
1748 return true; |
|
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|
1749 } |
|
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|
1750 |
|
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|
1751 buf[0] = '\0'; |
|
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|
1752 if (offset) *offset = -1; |
|
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|
1753 return false; |
| 0 | 1754 } |
| 1755 | |
| 1756 // Loads .dll/.so and | |
| 1757 // in case of error it checks if .dll/.so was built for the | |
| 1758 // same architecture as Hotspot is running on | |
| 1759 | |
|
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|
1760 |
|
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|
1761 // Remember the stack's state. The Linux dynamic linker will change |
|
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|
1762 // the stack to 'executable' at most once, so we must safepoint only once. |
|
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|
1763 bool os::Linux::_stack_is_executable = false; |
|
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|
1764 |
|
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|
1765 // VM operation that loads a library. This is necessary if stack protection |
|
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|
1766 // of the Java stacks can be lost during loading the library. If we |
|
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|
1767 // do not stop the Java threads, they can stack overflow before the stacks |
|
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|
1768 // are protected again. |
|
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|
1769 class VM_LinuxDllLoad: public VM_Operation { |
|
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|
1770 private: |
|
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|
1771 const char *_filename; |
|
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|
1772 char *_ebuf; |
|
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|
1773 int _ebuflen; |
|
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|
1774 void *_lib; |
|
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|
1775 public: |
|
8812
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|
1776 VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : |
|
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|
1777 _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} |
|
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|
1778 VMOp_Type type() const { return VMOp_LinuxDllLoad; } |
|
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|
1779 void doit() { |
|
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|
1780 _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); |
|
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|
1781 os::Linux::_stack_is_executable = true; |
|
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|
1782 } |
|
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|
1783 void* loaded_library() { return _lib; } |
|
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|
1784 }; |
|
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|
1785 |
| 0 | 1786 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
| 1787 { | |
|
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|
1788 void * result = NULL; |
|
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|
1789 bool load_attempted = false; |
|
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|
1790 |
|
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|
1791 // Check whether the library to load might change execution rights |
|
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|
1792 // of the stack. If they are changed, the protection of the stack |
|
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|
1793 // guard pages will be lost. We need a safepoint to fix this. |
|
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|
1794 // |
|
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|
1795 // See Linux man page execstack(8) for more info. |
|
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|
1796 if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) { |
|
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|
1797 ElfFile ef(filename); |
|
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|
1798 if (!ef.specifies_noexecstack()) { |
|
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|
1799 if (!is_init_completed()) { |
|
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|
1800 os::Linux::_stack_is_executable = true; |
|
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|
1801 // This is OK - No Java threads have been created yet, and hence no |
|
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|
1802 // stack guard pages to fix. |
|
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|
1803 // |
|
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|
1804 // This should happen only when you are building JDK7 using a very |
|
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|
1805 // old version of JDK6 (e.g., with JPRT) and running test_gamma. |
|
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|
1806 // |
|
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|
1807 // Dynamic loader will make all stacks executable after |
|
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|
1808 // this function returns, and will not do that again. |
|
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|
1809 assert(Threads::first() == NULL, "no Java threads should exist yet."); |
|
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|
1810 } else { |
|
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|
1811 warning("You have loaded library %s which might have disabled stack guard. " |
|
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|
1812 "The VM will try to fix the stack guard now.\n" |
|
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1813 "It's highly recommended that you fix the library with " |
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1814 "'execstack -c <libfile>', or link it with '-z noexecstack'.", |
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1815 filename); |
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1816 |
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1817 assert(Thread::current()->is_Java_thread(), "must be Java thread"); |
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1818 JavaThread *jt = JavaThread::current(); |
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1819 if (jt->thread_state() != _thread_in_native) { |
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1820 // This happens when a compiler thread tries to load a hsdis-<arch>.so file |
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1821 // that requires ExecStack. Cannot enter safe point. Let's give up. |
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1822 warning("Unable to fix stack guard. Giving up."); |
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1823 } else { |
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1824 if (!LoadExecStackDllInVMThread) { |
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1825 // This is for the case where the DLL has an static |
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1826 // constructor function that executes JNI code. We cannot |
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1827 // load such DLLs in the VMThread. |
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1828 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1829 } |
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1830 |
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1831 ThreadInVMfromNative tiv(jt); |
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1832 debug_only(VMNativeEntryWrapper vew;) |
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1833 |
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1834 VM_LinuxDllLoad op(filename, ebuf, ebuflen); |
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1835 VMThread::execute(&op); |
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1836 if (LoadExecStackDllInVMThread) { |
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1837 result = op.loaded_library(); |
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1838 } |
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1839 load_attempted = true; |
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1840 } |
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1841 } |
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1842 } |
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1843 } |
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1844 |
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1845 if (!load_attempted) { |
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1846 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1847 } |
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1848 |
| 0 | 1849 if (result != NULL) { |
| 1850 // Successful loading | |
| 1851 return result; | |
| 1852 } | |
| 1853 | |
| 1854 Elf32_Ehdr elf_head; | |
| 1855 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 1856 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 1857 | |
| 1858 if (diag_msg_max_length==0) { | |
| 1859 // No more space in ebuf for additional diagnostics message | |
| 1860 return NULL; | |
| 1861 } | |
| 1862 | |
| 1863 | |
| 1864 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 1865 | |
| 1866 if (file_descriptor < 0) { | |
| 1867 // Can't open library, report dlerror() message | |
| 1868 return NULL; | |
| 1869 } | |
| 1870 | |
| 1871 bool failed_to_read_elf_head= | |
| 1872 (sizeof(elf_head)!= | |
| 1873 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 1874 | |
| 1875 ::close(file_descriptor); | |
| 1876 if (failed_to_read_elf_head) { | |
| 1877 // file i/o error - report dlerror() msg | |
| 1878 return NULL; | |
| 1879 } | |
| 1880 | |
| 1881 typedef struct { | |
| 1882 Elf32_Half code; // Actual value as defined in elf.h | |
| 1883 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 1884 char elf_class; // 32 or 64 bit | |
| 1885 char endianess; // MSB or LSB | |
| 1886 char* name; // String representation | |
| 1887 } arch_t; | |
| 1888 | |
| 1889 #ifndef EM_486 | |
| 1890 #define EM_486 6 /* Intel 80486 */ | |
| 1891 #endif | |
| 1892 | |
| 1893 static const arch_t arch_array[]={ | |
| 1894 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1895 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1896 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 1897 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 1898 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1899 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1900 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 1901 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
|
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1902 #if defined(VM_LITTLE_ENDIAN) |
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1903 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2LSB, (char*)"Power PC 64"}, |
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1904 #else |
| 1010 | 1905 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
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1906 #endif |
| 1010 | 1907 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
| 1908 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, | |
| 1909 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, | |
| 1910 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, | |
| 1911 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, | |
| 1912 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, | |
| 1913 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} | |
| 0 | 1914 }; |
| 1915 | |
| 1916 #if (defined IA32) | |
| 1917 static Elf32_Half running_arch_code=EM_386; | |
| 1918 #elif (defined AMD64) | |
| 1919 static Elf32_Half running_arch_code=EM_X86_64; | |
| 1920 #elif (defined IA64) | |
| 1921 static Elf32_Half running_arch_code=EM_IA_64; | |
| 1922 #elif (defined __sparc) && (defined _LP64) | |
| 1923 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 1924 #elif (defined __sparc) && (!defined _LP64) | |
| 1925 static Elf32_Half running_arch_code=EM_SPARC; | |
| 1926 #elif (defined __powerpc64__) | |
| 1927 static Elf32_Half running_arch_code=EM_PPC64; | |
| 1928 #elif (defined __powerpc__) | |
| 1929 static Elf32_Half running_arch_code=EM_PPC; | |
| 1010 | 1930 #elif (defined ARM) |
| 1931 static Elf32_Half running_arch_code=EM_ARM; | |
| 1932 #elif (defined S390) | |
| 1933 static Elf32_Half running_arch_code=EM_S390; | |
| 1934 #elif (defined ALPHA) | |
| 1935 static Elf32_Half running_arch_code=EM_ALPHA; | |
| 1936 #elif (defined MIPSEL) | |
| 1937 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; | |
| 1938 #elif (defined PARISC) | |
| 1939 static Elf32_Half running_arch_code=EM_PARISC; | |
| 1940 #elif (defined MIPS) | |
| 1941 static Elf32_Half running_arch_code=EM_MIPS; | |
| 1942 #elif (defined M68K) | |
| 1943 static Elf32_Half running_arch_code=EM_68K; | |
| 0 | 1944 #else |
| 1945 #error Method os::dll_load requires that one of following is defined:\ | |
| 1010 | 1946 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
| 0 | 1947 #endif |
| 1948 | |
| 1949 // Identify compatability class for VM's architecture and library's architecture | |
| 1950 // Obtain string descriptions for architectures | |
| 1951 | |
| 1952 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 1953 int running_arch_index=-1; | |
| 1954 | |
| 1955 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 1956 if (running_arch_code == arch_array[i].code) { | |
| 1957 running_arch_index = i; | |
| 1958 } | |
| 1959 if (lib_arch.code == arch_array[i].code) { | |
| 1960 lib_arch.compat_class = arch_array[i].compat_class; | |
| 1961 lib_arch.name = arch_array[i].name; | |
| 1962 } | |
| 1963 } | |
| 1964 | |
| 1965 assert(running_arch_index != -1, | |
| 1966 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 1967 if (running_arch_index == -1) { | |
| 1968 // Even though running architecture detection failed | |
| 1969 // we may still continue with reporting dlerror() message | |
| 1970 return NULL; | |
| 1971 } | |
| 1972 | |
| 1973 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 1974 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 1975 return NULL; | |
| 1976 } | |
| 1977 | |
| 1010 | 1978 #ifndef S390 |
| 0 | 1979 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
| 1980 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 1981 return NULL; | |
| 1982 } | |
| 1010 | 1983 #endif // !S390 |
| 0 | 1984 |
| 1985 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 1986 if ( lib_arch.name!=NULL ) { | |
| 1987 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 1988 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 1989 lib_arch.name, arch_array[running_arch_index].name); | |
| 1990 } else { | |
| 1991 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 1992 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 1993 lib_arch.code, | |
| 1994 arch_array[running_arch_index].name); | |
| 1995 } | |
| 1996 } | |
| 1997 | |
| 1998 return NULL; | |
| 1999 } | |
| 2000 | |
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2001 void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { |
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2002 void * result = ::dlopen(filename, RTLD_LAZY); |
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2003 if (result == NULL) { |
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2004 ::strncpy(ebuf, ::dlerror(), ebuflen - 1); |
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2005 ebuf[ebuflen-1] = '\0'; |
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2006 } |
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2007 return result; |
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2008 } |
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2009 |
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2010 void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { |
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2011 void * result = NULL; |
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2012 if (LoadExecStackDllInVMThread) { |
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2013 result = dlopen_helper(filename, ebuf, ebuflen); |
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2014 } |
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2015 |
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2016 // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a |
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2017 // library that requires an executable stack, or which does not have this |
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2018 // stack attribute set, dlopen changes the stack attribute to executable. The |
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2019 // read protection of the guard pages gets lost. |
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2020 // |
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2021 // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad |
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2022 // may have been queued at the same time. |
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2023 |
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2024 if (!_stack_is_executable) { |
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2025 JavaThread *jt = Threads::first(); |
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2026 |
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2027 while (jt) { |
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2028 if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized |
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2029 jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions |
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2030 if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(), |
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2031 jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) { |
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2032 warning("Attempt to reguard stack yellow zone failed."); |
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2033 } |
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2034 } |
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2035 jt = jt->next(); |
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2036 } |
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2037 } |
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2038 |
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2039 return result; |
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|
2040 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2041 |
| 242 | 2042 /* |
| 2043 * glibc-2.0 libdl is not MT safe. If you are building with any glibc, | |
| 2044 * chances are you might want to run the generated bits against glibc-2.0 | |
| 2045 * libdl.so, so always use locking for any version of glibc. | |
| 2046 */ | |
| 2047 void* os::dll_lookup(void* handle, const char* name) { | |
| 2048 pthread_mutex_lock(&dl_mutex); | |
| 2049 void* res = dlsym(handle, name); | |
| 2050 pthread_mutex_unlock(&dl_mutex); | |
| 2051 return res; | |
| 2052 } | |
| 0 | 2053 |
|
14286
c250880a6673
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
parents:
12997
diff
changeset
|
2054 void* os::get_default_process_handle() { |
|
c250880a6673
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
parents:
12997
diff
changeset
|
2055 return (void*)::dlopen(NULL, RTLD_LAZY); |
|
c250880a6673
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
parents:
12997
diff
changeset
|
2056 } |
| 0 | 2057 |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2058 static bool _print_ascii_file(const char* filename, outputStream* st) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2059 int fd = ::open(filename, O_RDONLY); |
| 0 | 2060 if (fd == -1) { |
| 2061 return false; | |
| 2062 } | |
| 2063 | |
| 2064 char buf[32]; | |
| 2065 int bytes; | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2066 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
| 0 | 2067 st->print_raw(buf, bytes); |
| 2068 } | |
| 2069 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2070 ::close(fd); |
| 0 | 2071 |
| 2072 return true; | |
| 2073 } | |
| 2074 | |
| 2075 void os::print_dll_info(outputStream *st) { | |
| 2076 st->print_cr("Dynamic libraries:"); | |
| 2077 | |
| 2078 char fname[32]; | |
| 2079 pid_t pid = os::Linux::gettid(); | |
| 2080 | |
| 2081 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); | |
| 2082 | |
| 2083 if (!_print_ascii_file(fname, st)) { | |
| 2084 st->print("Can not get library information for pid = %d\n", pid); | |
| 2085 } | |
| 2086 } | |
| 2087 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2088 void os::print_os_info_brief(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2089 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2090 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2091 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2092 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2093 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2094 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2095 } |
| 0 | 2096 |
| 2097 void os::print_os_info(outputStream* st) { | |
| 2098 st->print("OS:"); | |
| 2099 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2100 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2101 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2102 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2103 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2104 // Print warning if unsafe chroot environment detected |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2105 if (unsafe_chroot_detected) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2106 st->print("WARNING!! "); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
2107 st->print_cr("%s", unstable_chroot_error); |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2108 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2109 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2110 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2111 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2112 os::Posix::print_rlimit_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2113 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2114 os::Posix::print_load_average(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2115 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2116 os::Linux::print_full_memory_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2117 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2118 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2119 // Try to identify popular distros. |
|
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2120 // Most Linux distributions have a /etc/XXX-release file, which contains |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2121 // the OS version string. Newer Linux distributions have a /etc/lsb-release |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2122 // file that also contains the OS version string. Some have more than one |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2123 // /etc/XXX-release file (e.g. Mandrake has both /etc/mandrake-release and |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2124 // /etc/redhat-release.), so the order is important. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2125 // Any Linux that is based on Redhat (i.e. Oracle, Mandrake, Sun JDS...) have |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2126 // their own specific XXX-release file as well as a redhat-release file. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2127 // Because of this the XXX-release file needs to be searched for before the |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2128 // redhat-release file. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2129 // Since Red Hat has a lsb-release file that is not very descriptive the |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2130 // search for redhat-release needs to be before lsb-release. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2131 // Since the lsb-release file is the new standard it needs to be searched |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2132 // before the older style release files. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2133 // Searching system-release (Red Hat) and os-release (other Linuxes) are a |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2134 // next to last resort. The os-release file is a new standard that contains |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2135 // distribution information and the system-release file seems to be an old |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2136 // standard that has been replaced by the lsb-release and os-release files. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2137 // Searching for the debian_version file is the last resort. It contains |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2138 // an informative string like "6.0.6" or "wheezy/sid". Because of this |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2139 // "Debian " is printed before the contents of the debian_version file. |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2140 void os::Linux::print_distro_info(outputStream* st) { |
|
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2141 if (!_print_ascii_file("/etc/oracle-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2142 !_print_ascii_file("/etc/mandriva-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2143 !_print_ascii_file("/etc/mandrake-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2144 !_print_ascii_file("/etc/sun-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2145 !_print_ascii_file("/etc/redhat-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2146 !_print_ascii_file("/etc/lsb-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2147 !_print_ascii_file("/etc/SuSE-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2148 !_print_ascii_file("/etc/turbolinux-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2149 !_print_ascii_file("/etc/gentoo-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2150 !_print_ascii_file("/etc/ltib-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2151 !_print_ascii_file("/etc/angstrom-version", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2152 !_print_ascii_file("/etc/system-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2153 !_print_ascii_file("/etc/os-release", st)) { |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2154 |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2155 if (file_exists("/etc/debian_version")) { |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2156 st->print("Debian "); |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2157 _print_ascii_file("/etc/debian_version", st); |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2158 } else { |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2159 st->print("Linux"); |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2160 } |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2161 } |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2162 st->cr(); |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2163 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2164 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2165 void os::Linux::print_libversion_info(outputStream* st) { |
| 0 | 2166 // libc, pthread |
| 2167 st->print("libc:"); | |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
2168 st->print("%s ", os::Linux::glibc_version()); |
|
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
2169 st->print("%s ", os::Linux::libpthread_version()); |
| 0 | 2170 if (os::Linux::is_LinuxThreads()) { |
| 2171 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); | |
| 2172 } | |
| 2173 st->cr(); | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2174 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2175 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2176 void os::Linux::print_full_memory_info(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2177 st->print("\n/proc/meminfo:\n"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2178 _print_ascii_file("/proc/meminfo", st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2179 st->cr(); |
|
3800
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2180 } |
|
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2181 |
| 0 | 2182 void os::print_memory_info(outputStream* st) { |
| 2183 | |
| 2184 st->print("Memory:"); | |
| 2185 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2186 | |
| 2187 // values in struct sysinfo are "unsigned long" | |
| 2188 struct sysinfo si; | |
| 2189 sysinfo(&si); | |
| 2190 | |
| 2191 st->print(", physical " UINT64_FORMAT "k", | |
| 2192 os::physical_memory() >> 10); | |
| 2193 st->print("(" UINT64_FORMAT "k free)", | |
| 2194 os::available_memory() >> 10); | |
| 2195 st->print(", swap " UINT64_FORMAT "k", | |
| 2196 ((jlong)si.totalswap * si.mem_unit) >> 10); | |
| 2197 st->print("(" UINT64_FORMAT "k free)", | |
| 2198 ((jlong)si.freeswap * si.mem_unit) >> 10); | |
| 2199 st->cr(); | |
| 2200 } | |
| 2201 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2202 void os::pd_print_cpu_info(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2203 st->print("\n/proc/cpuinfo:\n"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2204 if (!_print_ascii_file("/proc/cpuinfo", st)) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2205 st->print(" <Not Available>"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2206 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2207 st->cr(); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2208 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2209 |
| 0 | 2210 void os::print_siginfo(outputStream* st, void* siginfo) { |
| 14410 | 2211 const siginfo_t* si = (const siginfo_t*)siginfo; |
| 2212 | |
| 2213 os::Posix::print_siginfo_brief(st, si); | |
|
20375
6e0cb14ce59b
8046070: Class Data Sharing clean up and refactoring
iklam
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diff
changeset
|
2214 #if INCLUDE_CDS |
| 14410 | 2215 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && |
| 0 | 2216 UseSharedSpaces) { |
| 2217 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2218 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2219 st->print("\n\nError accessing class data sharing archive." \ | |
| 2220 " Mapped file inaccessible during execution, " \ | |
| 2221 " possible disk/network problem."); | |
| 2222 } | |
| 2223 } | |
|
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|
2224 #endif |
| 0 | 2225 st->cr(); |
| 2226 } | |
| 2227 | |
| 2228 | |
| 2229 static void print_signal_handler(outputStream* st, int sig, | |
| 2230 char* buf, size_t buflen); | |
| 2231 | |
| 2232 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2233 st->print_cr("Signal Handlers:"); | |
| 2234 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2235 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2236 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2237 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2238 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2239 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2240 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2241 print_signal_handler(st, SR_signum, buf, buflen); | |
| 2242 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); | |
| 2243 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2244 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); | |
| 2245 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
|
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2246 #if defined(PPC64) |
|
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
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diff
changeset
|
2247 print_signal_handler(st, SIGTRAP, buf, buflen); |
|
935bf3340572
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diff
changeset
|
2248 #endif |
| 0 | 2249 } |
| 2250 | |
| 2251 static char saved_jvm_path[MAXPATHLEN] = {0}; | |
| 2252 | |
|
7456
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7206
diff
changeset
|
2253 // Find the full path to the current module, libjvm.so |
| 1642 | 2254 void os::jvm_path(char *buf, jint buflen) { |
| 0 | 2255 // Error checking. |
| 1642 | 2256 if (buflen < MAXPATHLEN) { |
| 0 | 2257 assert(false, "must use a large-enough buffer"); |
| 2258 buf[0] = '\0'; | |
| 2259 return; | |
| 2260 } | |
| 2261 // Lazy resolve the path to current module. | |
| 2262 if (saved_jvm_path[0] != 0) { | |
| 2263 strcpy(buf, saved_jvm_path); | |
| 2264 return; | |
| 2265 } | |
| 2266 | |
| 2267 char dli_fname[MAXPATHLEN]; | |
| 2268 bool ret = dll_address_to_library_name( | |
| 2269 CAST_FROM_FN_PTR(address, os::jvm_path), | |
| 2270 dli_fname, sizeof(dli_fname), NULL); | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2271 assert(ret, "cannot locate libjvm"); |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2272 char *rp = NULL; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2273 if (ret && dli_fname[0] != '\0') { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2274 rp = realpath(dli_fname, buf); |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2275 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2276 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2277 return; |
| 0 | 2278 |
|
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
2204
diff
changeset
|
2279 if (Arguments::created_by_gamma_launcher()) { |
| 0 | 2280 // Support for the gamma launcher. Typical value for buf is |
| 2281 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2282 // the right place in the string, then assume we are installed in a JDK and | |
| 2283 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2284 // up the path so it looks like libjvm.so is installed there (append a | |
| 2285 // fake suffix hotspot/libjvm.so). | |
| 2286 const char *p = buf + strlen(buf) - 1; | |
| 2287 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2288 for (--p; p > buf && *p != '/'; --p) | |
| 2289 /* empty */ ; | |
| 2290 } | |
| 2291 | |
| 2292 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2293 // Look for JAVA_HOME in the environment. | |
| 2294 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2295 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 1642 | 2296 char* jrelib_p; |
| 2297 int len; | |
| 2298 | |
|
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dcubed
parents:
7206
diff
changeset
|
2299 // Check the current module name "libjvm.so". |
| 0 | 2300 p = strrchr(buf, '/'); |
| 2301 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2302 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2303 rp = realpath(java_home_var, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2304 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2305 return; |
| 1642 | 2306 |
| 2307 // determine if this is a legacy image or modules image | |
| 2308 // modules image doesn't have "jre" subdirectory | |
| 2309 len = strlen(buf); | |
| 17567 | 2310 assert(len < buflen, "Ran out of buffer room"); |
| 1642 | 2311 jrelib_p = buf + len; |
| 2312 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); | |
| 2313 if (0 != access(buf, F_OK)) { | |
| 2314 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); | |
| 2315 } | |
| 2316 | |
| 0 | 2317 if (0 == access(buf, F_OK)) { |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2318 // Use current module name "libjvm.so" |
| 1642 | 2319 len = strlen(buf); |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2320 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); |
| 0 | 2321 } else { |
| 2322 // Go back to path of .so | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2323 rp = realpath(dli_fname, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2324 if (rp == NULL) |
|
513
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6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2325 return; |
| 0 | 2326 } |
| 2327 } | |
| 2328 } | |
| 2329 } | |
| 2330 | |
| 17567 | 2331 strncpy(saved_jvm_path, buf, MAXPATHLEN); |
| 0 | 2332 } |
| 2333 | |
| 2334 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2335 // no prefix required, not even "_" | |
| 2336 } | |
| 2337 | |
| 2338 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2339 // no suffix required | |
| 2340 } | |
| 2341 | |
| 2342 //////////////////////////////////////////////////////////////////////////////// | |
| 2343 // sun.misc.Signal support | |
| 2344 | |
| 2345 static volatile jint sigint_count = 0; | |
| 2346 | |
| 2347 static void | |
| 2348 UserHandler(int sig, void *siginfo, void *context) { | |
| 2349 // 4511530 - sem_post is serialized and handled by the manager thread. When | |
| 2350 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We | |
| 2351 // don't want to flood the manager thread with sem_post requests. | |
| 2352 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) | |
| 2353 return; | |
| 2354 | |
| 2355 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2356 // handler fails to abort. Let VM die immediately. | |
| 2357 if (sig == SIGINT && is_error_reported()) { | |
| 2358 os::die(); | |
| 2359 } | |
| 2360 | |
| 2361 os::signal_notify(sig); | |
| 2362 } | |
| 2363 | |
| 2364 void* os::user_handler() { | |
| 2365 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2366 } | |
| 2367 | |
| 10405 | 2368 class Semaphore : public StackObj { |
| 2369 public: | |
| 2370 Semaphore(); | |
| 2371 ~Semaphore(); | |
| 2372 void signal(); | |
| 2373 void wait(); | |
| 2374 bool trywait(); | |
| 2375 bool timedwait(unsigned int sec, int nsec); | |
| 2376 private: | |
| 2377 sem_t _semaphore; | |
| 2378 }; | |
| 2379 | |
| 2380 Semaphore::Semaphore() { | |
| 2381 sem_init(&_semaphore, 0, 0); | |
| 2382 } | |
| 2383 | |
| 2384 Semaphore::~Semaphore() { | |
| 2385 sem_destroy(&_semaphore); | |
| 2386 } | |
| 2387 | |
| 2388 void Semaphore::signal() { | |
| 2389 sem_post(&_semaphore); | |
| 2390 } | |
| 2391 | |
| 2392 void Semaphore::wait() { | |
| 2393 sem_wait(&_semaphore); | |
| 2394 } | |
| 2395 | |
| 2396 bool Semaphore::trywait() { | |
| 2397 return sem_trywait(&_semaphore) == 0; | |
| 2398 } | |
| 2399 | |
| 2400 bool Semaphore::timedwait(unsigned int sec, int nsec) { | |
| 17738 | 2401 |
| 10405 | 2402 struct timespec ts; |
| 17738 | 2403 // Semaphore's are always associated with CLOCK_REALTIME |
| 2404 os::Linux::clock_gettime(CLOCK_REALTIME, &ts); | |
| 2405 // see unpackTime for discussion on overflow checking | |
| 2406 if (sec >= MAX_SECS) { | |
| 2407 ts.tv_sec += MAX_SECS; | |
| 2408 ts.tv_nsec = 0; | |
| 2409 } else { | |
| 2410 ts.tv_sec += sec; | |
| 2411 ts.tv_nsec += nsec; | |
| 2412 if (ts.tv_nsec >= NANOSECS_PER_SEC) { | |
| 2413 ts.tv_nsec -= NANOSECS_PER_SEC; | |
| 2414 ++ts.tv_sec; // note: this must be <= max_secs | |
| 2415 } | |
| 2416 } | |
| 10405 | 2417 |
| 2418 while (1) { | |
| 2419 int result = sem_timedwait(&_semaphore, &ts); | |
| 2420 if (result == 0) { | |
| 2421 return true; | |
| 2422 } else if (errno == EINTR) { | |
| 2423 continue; | |
| 2424 } else if (errno == ETIMEDOUT) { | |
| 2425 return false; | |
| 2426 } else { | |
| 2427 return false; | |
| 2428 } | |
| 2429 } | |
| 2430 } | |
| 2431 | |
| 0 | 2432 extern "C" { |
| 2433 typedef void (*sa_handler_t)(int); | |
| 2434 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2435 } | |
| 2436 | |
| 2437 void* os::signal(int signal_number, void* handler) { | |
| 2438 struct sigaction sigAct, oldSigAct; | |
| 2439 | |
| 2440 sigfillset(&(sigAct.sa_mask)); | |
| 2441 sigAct.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 2442 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2443 | |
| 2444 if (sigaction(signal_number, &sigAct, &oldSigAct)) { | |
| 2445 // -1 means registration failed | |
| 2446 return (void *)-1; | |
| 2447 } | |
| 2448 | |
| 2449 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2450 } | |
| 2451 | |
| 2452 void os::signal_raise(int signal_number) { | |
| 2453 ::raise(signal_number); | |
| 2454 } | |
| 2455 | |
| 2456 /* | |
| 2457 * The following code is moved from os.cpp for making this | |
| 2458 * code platform specific, which it is by its very nature. | |
| 2459 */ | |
| 2460 | |
| 2461 // Will be modified when max signal is changed to be dynamic | |
| 2462 int os::sigexitnum_pd() { | |
| 2463 return NSIG; | |
| 2464 } | |
| 2465 | |
| 2466 // a counter for each possible signal value | |
| 2467 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
| 2468 | |
| 2469 // Linux(POSIX) specific hand shaking semaphore. | |
| 2470 static sem_t sig_sem; | |
| 10405 | 2471 static Semaphore sr_semaphore; |
| 0 | 2472 |
| 2473 void os::signal_init_pd() { | |
| 2474 // Initialize signal structures | |
| 2475 ::memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
| 2476 | |
| 2477 // Initialize signal semaphore | |
| 2478 ::sem_init(&sig_sem, 0, 0); | |
| 2479 } | |
| 2480 | |
| 2481 void os::signal_notify(int sig) { | |
| 2482 Atomic::inc(&pending_signals[sig]); | |
| 2483 ::sem_post(&sig_sem); | |
| 2484 } | |
| 2485 | |
| 2486 static int check_pending_signals(bool wait) { | |
| 2487 Atomic::store(0, &sigint_count); | |
| 2488 for (;;) { | |
| 2489 for (int i = 0; i < NSIG + 1; i++) { | |
| 2490 jint n = pending_signals[i]; | |
| 2491 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2492 return i; | |
| 2493 } | |
| 2494 } | |
| 2495 if (!wait) { | |
| 2496 return -1; | |
| 2497 } | |
| 2498 JavaThread *thread = JavaThread::current(); | |
| 2499 ThreadBlockInVM tbivm(thread); | |
| 2500 | |
| 2501 bool threadIsSuspended; | |
| 2502 do { | |
| 2503 thread->set_suspend_equivalent(); | |
| 2504 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2505 ::sem_wait(&sig_sem); | |
| 2506 | |
| 2507 // were we externally suspended while we were waiting? | |
| 2508 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2509 if (threadIsSuspended) { | |
| 2510 // | |
| 2511 // The semaphore has been incremented, but while we were waiting | |
| 2512 // another thread suspended us. We don't want to continue running | |
| 2513 // while suspended because that would surprise the thread that | |
| 2514 // suspended us. | |
| 2515 // | |
| 2516 ::sem_post(&sig_sem); | |
| 2517 | |
| 2518 thread->java_suspend_self(); | |
| 2519 } | |
| 2520 } while (threadIsSuspended); | |
| 2521 } | |
| 2522 } | |
| 2523 | |
| 2524 int os::signal_lookup() { | |
| 2525 return check_pending_signals(false); | |
| 2526 } | |
| 2527 | |
| 2528 int os::signal_wait() { | |
| 2529 return check_pending_signals(true); | |
| 2530 } | |
| 2531 | |
| 2532 //////////////////////////////////////////////////////////////////////////////// | |
| 2533 // Virtual Memory | |
| 2534 | |
| 2535 int os::vm_page_size() { | |
| 2536 // Seems redundant as all get out | |
| 2537 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2538 return os::Linux::page_size(); | |
| 2539 } | |
| 2540 | |
| 2541 // Solaris allocates memory by pages. | |
| 2542 int os::vm_allocation_granularity() { | |
| 2543 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2544 return os::Linux::page_size(); | |
| 2545 } | |
| 2546 | |
| 2547 // Rationale behind this function: | |
| 2548 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable | |
| 2549 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get | |
| 2550 // samples for JITted code. Here we create private executable mapping over the code cache | |
| 2551 // and then we can use standard (well, almost, as mapping can change) way to provide | |
| 2552 // info for the reporting script by storing timestamp and location of symbol | |
| 2553 void linux_wrap_code(char* base, size_t size) { | |
| 2554 static volatile jint cnt = 0; | |
| 2555 | |
| 2556 if (!UseOprofile) { | |
| 2557 return; | |
| 2558 } | |
| 2559 | |
|
1497
96d554193f72
6944822: Fix for 6938627 exposes problem with hard-coded buffer sizes
coleenp
parents:
1353
diff
changeset
|
2560 char buf[PATH_MAX+1]; |
| 0 | 2561 int num = Atomic::add(1, &cnt); |
| 2562 | |
|
1353
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents:
1325
diff
changeset
|
2563 snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d", |
|
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents:
1325
diff
changeset
|
2564 os::get_temp_directory(), os::current_process_id(), num); |
| 0 | 2565 unlink(buf); |
| 2566 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2567 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
| 0 | 2568 |
| 2569 if (fd != -1) { | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2570 off_t rv = ::lseek(fd, size-2, SEEK_SET); |
| 0 | 2571 if (rv != (off_t)-1) { |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2572 if (::write(fd, "", 1) == 1) { |
| 0 | 2573 mmap(base, size, |
| 2574 PROT_READ|PROT_WRITE|PROT_EXEC, | |
| 2575 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); | |
| 2576 } | |
| 2577 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2578 ::close(fd); |
| 0 | 2579 unlink(buf); |
| 2580 } | |
| 2581 } | |
| 2582 | |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2583 static bool recoverable_mmap_error(int err) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2584 // See if the error is one we can let the caller handle. This |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2585 // list of errno values comes from JBS-6843484. I can't find a |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2586 // Linux man page that documents this specific set of errno |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2587 // values so while this list currently matches Solaris, it may |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2588 // change as we gain experience with this failure mode. |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2589 switch (err) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2590 case EBADF: |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2591 case EINVAL: |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2592 case ENOTSUP: |
|
a837fa3d3f86
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|
2593 // let the caller deal with these errors |
|
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|
2594 return true; |
|
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|
2595 |
|
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|
2596 default: |
|
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|
2597 // Any remaining errors on this OS can cause our reserved mapping |
|
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|
2598 // to be lost. That can cause confusion where different data |
|
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|
2599 // structures think they have the same memory mapped. The worst |
|
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|
2600 // scenario is if both the VM and a library think they have the |
|
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|
2601 // same memory mapped. |
|
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|
2602 return false; |
|
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|
2603 } |
|
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|
2604 } |
|
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|
2605 |
|
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|
2606 static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
|
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|
2607 int err) { |
|
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|
2608 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
|
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|
2609 ", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
|
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|
2610 strerror(err), err); |
|
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|
2611 } |
|
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|
2612 |
|
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|
2613 static void warn_fail_commit_memory(char* addr, size_t size, |
|
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|
2614 size_t alignment_hint, bool exec, |
|
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|
2615 int err) { |
|
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|
2616 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
|
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|
2617 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size, |
|
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|
2618 alignment_hint, exec, strerror(err), err); |
|
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|
2619 } |
|
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|
2620 |
| 0 | 2621 // NOTE: Linux kernel does not really reserve the pages for us. |
| 2622 // All it does is to check if there are enough free pages | |
| 2623 // left at the time of mmap(). This could be a potential | |
| 2624 // problem. | |
|
10969
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|
2625 int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) { |
| 656 | 2626 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
| 2627 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, | |
| 0 | 2628 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
| 3885 | 2629 if (res != (uintptr_t) MAP_FAILED) { |
| 2630 if (UseNUMAInterleaving) { | |
| 2631 numa_make_global(addr, size); | |
| 2632 } | |
|
10969
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|
2633 return 0; |
|
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|
2634 } |
|
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|
2635 |
|
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|
2636 int err = errno; // save errno from mmap() call above |
|
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|
2637 |
|
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|
2638 if (!recoverable_mmap_error(err)) { |
|
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|
2639 warn_fail_commit_memory(addr, size, exec, err); |
|
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|
2640 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "committing reserved memory."); |
|
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|
2641 } |
|
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|
2642 |
|
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|
2643 return err; |
|
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|
2644 } |
|
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|
2645 |
|
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changeset
|
2646 bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
|
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|
2647 return os::Linux::commit_memory_impl(addr, size, exec) == 0; |
|
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|
2648 } |
|
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|
2649 |
|
a837fa3d3f86
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changeset
|
2650 void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2651 const char* mesg) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2652 assert(mesg != NULL, "mesg must be specified"); |
|
a837fa3d3f86
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changeset
|
2653 int err = os::Linux::commit_memory_impl(addr, size, exec); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2654 if (err != 0) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2655 // the caller wants all commit errors to exit with the specified mesg: |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2656 warn_fail_commit_memory(addr, size, exec, err); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2657 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
|
a837fa3d3f86
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changeset
|
2658 } |
| 0 | 2659 } |
| 2660 | |
|
3286
139667d9836a
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2302
diff
changeset
|
2661 // Define MAP_HUGETLB here so we can build HotSpot on old systems. |
|
139667d9836a
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iveresov
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diff
changeset
|
2662 #ifndef MAP_HUGETLB |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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2302
diff
changeset
|
2663 #define MAP_HUGETLB 0x40000 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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diff
changeset
|
2664 #endif |
|
139667d9836a
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diff
changeset
|
2665 |
|
139667d9836a
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changeset
|
2666 // Define MADV_HUGEPAGE here so we can build HotSpot on old systems. |
|
139667d9836a
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diff
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|
2667 #ifndef MADV_HUGEPAGE |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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diff
changeset
|
2668 #define MADV_HUGEPAGE 14 |
|
139667d9836a
7034464: Support transparent large pages on Linux
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diff
changeset
|
2669 #endif |
|
139667d9836a
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changeset
|
2670 |
|
10969
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changeset
|
2671 int os::Linux::commit_memory_impl(char* addr, size_t size, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2672 size_t alignment_hint, bool exec) { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
2673 int err = os::Linux::commit_memory_impl(addr, size, exec); |
|
10969
a837fa3d3f86
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changeset
|
2674 if (err == 0) { |
|
3913
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
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3887
diff
changeset
|
2675 realign_memory(addr, size, alignment_hint); |
|
10969
a837fa3d3f86
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changeset
|
2676 } |
|
a837fa3d3f86
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changeset
|
2677 return err; |
|
a837fa3d3f86
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changeset
|
2678 } |
|
a837fa3d3f86
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changeset
|
2679 |
|
a837fa3d3f86
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changeset
|
2680 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2681 bool exec) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2682 return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2683 } |
|
a837fa3d3f86
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changeset
|
2684 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2685 void os::pd_commit_memory_or_exit(char* addr, size_t size, |
|
a837fa3d3f86
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changeset
|
2686 size_t alignment_hint, bool exec, |
|
a837fa3d3f86
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changeset
|
2687 const char* mesg) { |
|
a837fa3d3f86
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changeset
|
2688 assert(mesg != NULL, "mesg must be specified"); |
|
a837fa3d3f86
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changeset
|
2689 int err = os::Linux::commit_memory_impl(addr, size, alignment_hint, exec); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2690 if (err != 0) { |
|
a837fa3d3f86
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changeset
|
2691 // the caller wants all commit errors to exit with the specified mesg: |
|
a837fa3d3f86
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changeset
|
2692 warn_fail_commit_memory(addr, size, alignment_hint, exec, err); |
|
a837fa3d3f86
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changeset
|
2693 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
|
a837fa3d3f86
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changeset
|
2694 } |
| 0 | 2695 } |
| 2696 | |
| 6197 | 2697 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
|
12110
4c84d351cca9
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changeset
|
2698 if (UseTransparentHugePages && alignment_hint > (size_t)vm_page_size()) { |
|
3286
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|
2699 // We don't check the return value: madvise(MADV_HUGEPAGE) may not |
|
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|
2700 // be supported or the memory may already be backed by huge pages. |
|
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|
2701 ::madvise(addr, bytes, MADV_HUGEPAGE); |
|
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|
2702 } |
|
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|
2703 } |
| 141 | 2704 |
| 6197 | 2705 void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
|
5937
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7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
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diff
changeset
|
2706 // This method works by doing an mmap over an existing mmaping and effectively discarding |
|
cf956638b844
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changeset
|
2707 // the existing pages. However it won't work for SHM-based large pages that cannot be |
|
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7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
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|
2708 // uncommitted at all. We don't do anything in this case to avoid creating a segment with |
|
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7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
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5909
diff
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|
2709 // small pages on top of the SHM segment. This method always works for small pages, so we |
|
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diff
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|
2710 // allow that in any case. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
11092
diff
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|
2711 if (alignment_hint <= (size_t)os::vm_page_size() || can_commit_large_page_memory()) { |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2712 commit_memory(addr, bytes, alignment_hint, !ExecMem); |
|
5937
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|
2713 } |
| 141 | 2714 } |
| 2715 | |
|
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|
2716 void os::numa_make_global(char *addr, size_t bytes) { |
|
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|
2717 Linux::numa_interleave_memory(addr, bytes); |
|
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|
2718 } |
| 141 | 2719 |
|
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|
2720 // Define for numa_set_bind_policy(int). Setting the argument to 0 will set the |
|
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|
2721 // bind policy to MPOL_PREFERRED for the current thread. |
|
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|
2722 #define USE_MPOL_PREFERRED 0 |
|
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|
2723 |
| 141 | 2724 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
|
12176
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|
2725 // To make NUMA and large pages more robust when both enabled, we need to ease |
|
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|
2726 // the requirements on where the memory should be allocated. MPOL_BIND is the |
|
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|
2727 // default policy and it will force memory to be allocated on the specified |
|
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|
2728 // node. Changing this to MPOL_PREFERRED will prefer to allocate the memory on |
|
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|
2729 // the specified node, but will not force it. Using this policy will prevent |
|
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|
2730 // getting SIGBUS when trying to allocate large pages on NUMA nodes with no |
|
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|
2731 // free large pages. |
|
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|
2732 Linux::numa_set_bind_policy(USE_MPOL_PREFERRED); |
| 141 | 2733 Linux::numa_tonode_memory(addr, bytes, lgrp_hint); |
| 2734 } | |
| 2735 | |
| 2736 bool os::numa_topology_changed() { return false; } | |
| 2737 | |
| 2738 size_t os::numa_get_groups_num() { | |
| 2739 int max_node = Linux::numa_max_node(); | |
| 2740 return max_node > 0 ? max_node + 1 : 1; | |
| 2741 } | |
| 2742 | |
| 2743 int os::numa_get_group_id() { | |
| 2744 int cpu_id = Linux::sched_getcpu(); | |
| 2745 if (cpu_id != -1) { | |
| 2746 int lgrp_id = Linux::get_node_by_cpu(cpu_id); | |
| 2747 if (lgrp_id != -1) { | |
| 2748 return lgrp_id; | |
| 2749 } | |
| 0 | 2750 } |
| 2751 return 0; | |
| 2752 } | |
| 2753 | |
| 141 | 2754 size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
| 2755 for (size_t i = 0; i < size; i++) { | |
| 2756 ids[i] = i; | |
| 2757 } | |
| 2758 return size; | |
| 2759 } | |
| 2760 | |
| 0 | 2761 bool os::get_page_info(char *start, page_info* info) { |
| 2762 return false; | |
| 2763 } | |
| 2764 | |
| 2765 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2766 return end; | |
| 2767 } | |
| 2768 | |
| 3826 | 2769 |
| 2770 int os::Linux::sched_getcpu_syscall(void) { | |
|
23822
626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
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diff
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|
2771 unsigned int cpu = 0; |
| 3826 | 2772 int retval = -1; |
| 2773 | |
| 2774 #if defined(IA32) | |
|
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2775 # ifndef SYS_getcpu |
|
9447b2fb6fcf
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|
2776 # define SYS_getcpu 318 |
|
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|
2777 # endif |
| 3826 | 2778 retval = syscall(SYS_getcpu, &cpu, NULL, NULL); |
| 2779 #elif defined(AMD64) | |
|
3887
9447b2fb6fcf
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|
2780 // Unfortunately we have to bring all these macros here from vsyscall.h |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2781 // to be able to compile on old linuxes. |
|
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|
2782 # define __NR_vgetcpu 2 |
|
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|
2783 # define VSYSCALL_START (-10UL << 20) |
|
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7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2784 # define VSYSCALL_SIZE 1024 |
|
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|
2785 # define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) |
| 3826 | 2786 typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); |
| 2787 vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); | |
| 2788 retval = vgetcpu(&cpu, NULL, NULL); | |
| 2789 #endif | |
| 2790 | |
| 2791 return (retval == -1) ? retval : cpu; | |
| 2792 } | |
| 2793 | |
| 2191 | 2794 // Something to do with the numa-aware allocator needs these symbols |
| 2795 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } | |
| 2796 extern "C" JNIEXPORT void numa_error(char *where) { } | |
| 2797 extern "C" JNIEXPORT int fork1() { return fork(); } | |
| 141 | 2798 |
|
763
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|
2799 |
|
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|
2800 // If we are running with libnuma version > 2, then we should |
|
cf71f149d7ae
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|
2801 // be trying to use symbols with versions 1.1 |
|
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|
2802 // If we are running with earlier version, which did not have symbol versions, |
|
cf71f149d7ae
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|
2803 // we should use the base version. |
|
cf71f149d7ae
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diff
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|
2804 void* os::Linux::libnuma_dlsym(void* handle, const char *name) { |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2805 void *f = dlvsym(handle, name, "libnuma_1.1"); |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2806 if (f == NULL) { |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2807 f = dlsym(handle, name); |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
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|
2808 } |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2809 return f; |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2810 } |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
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|
2811 |
|
462
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|
2812 bool os::Linux::libnuma_init() { |
| 141 | 2813 // sched_getcpu() should be in libc. |
| 2814 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, | |
| 2815 dlsym(RTLD_DEFAULT, "sched_getcpu"))); | |
| 2816 | |
| 3826 | 2817 // If it's not, try a direct syscall. |
| 2818 if (sched_getcpu() == -1) | |
| 2819 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); | |
| 2820 | |
| 141 | 2821 if (sched_getcpu() != -1) { // Does it work? |
|
267
9d6a3a6891f8
6720130: NUMA allocator: The linux version should search for libnuma.so.1
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parents:
199
diff
changeset
|
2822 void *handle = dlopen("libnuma.so.1", RTLD_LAZY); |
| 141 | 2823 if (handle != NULL) { |
| 2824 set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t, | |
|
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2825 libnuma_dlsym(handle, "numa_node_to_cpus"))); |
| 141 | 2826 set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t, |
|
763
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parents:
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diff
changeset
|
2827 libnuma_dlsym(handle, "numa_max_node"))); |
| 141 | 2828 set_numa_available(CAST_TO_FN_PTR(numa_available_func_t, |
|
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2829 libnuma_dlsym(handle, "numa_available"))); |
| 141 | 2830 set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t, |
|
763
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diff
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|
2831 libnuma_dlsym(handle, "numa_tonode_memory"))); |
|
462
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|
2832 set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t, |
|
763
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diff
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|
2833 libnuma_dlsym(handle, "numa_interleave_memory"))); |
|
12176
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|
2834 set_numa_set_bind_policy(CAST_TO_FN_PTR(numa_set_bind_policy_func_t, |
|
88c255656030
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11092
diff
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|
2835 libnuma_dlsym(handle, "numa_set_bind_policy"))); |
|
462
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|
2836 |
|
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|
2837 |
| 141 | 2838 if (numa_available() != -1) { |
|
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|
2839 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); |
| 141 | 2840 // Create a cpu -> node mapping |
| 6197 | 2841 _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true); |
| 141 | 2842 rebuild_cpu_to_node_map(); |
|
462
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|
2843 return true; |
| 141 | 2844 } |
| 2845 } | |
| 2846 } | |
|
462
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changeset
|
2847 return false; |
| 141 | 2848 } |
| 2849 | |
| 2850 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. | |
| 2851 // The table is later used in get_node_by_cpu(). | |
| 2852 void os::Linux::rebuild_cpu_to_node_map() { | |
|
462
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|
2853 const size_t NCPUS = 32768; // Since the buffer size computation is very obscure |
|
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changeset
|
2854 // in libnuma (possible values are starting from 16, |
|
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|
2855 // and continuing up with every other power of 2, but less |
|
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|
2856 // than the maximum number of CPUs supported by kernel), and |
|
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diff
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|
2857 // is a subject to change (in libnuma version 2 the requirements |
|
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changeset
|
2858 // are more reasonable) we'll just hardcode the number they use |
|
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diff
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|
2859 // in the library. |
|
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|
2860 const size_t BitsPerCLong = sizeof(long) * CHAR_BIT; |
|
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changeset
|
2861 |
|
24233
8128b98d4736
Crash in rebuild_cpu_to_node_map (JDK-8165153)
Doug Simon <doug.simon@oracle.com>
parents:
24218
diff
changeset
|
2862 size_t cpu_num = processor_count(); |
|
462
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|
2863 size_t cpu_map_size = NCPUS / BitsPerCLong; |
|
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|
2864 size_t cpu_map_valid_size = |
|
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|
2865 MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size); |
|
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|
2866 |
| 141 | 2867 cpu_to_node()->clear(); |
| 2868 cpu_to_node()->at_grow(cpu_num - 1); | |
|
462
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|
2869 size_t node_num = numa_get_groups_num(); |
|
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|
2870 |
| 6197 | 2871 unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size, mtInternal); |
|
462
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|
2872 for (size_t i = 0; i < node_num; i++) { |
| 141 | 2873 if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) { |
|
462
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|
2874 for (size_t j = 0; j < cpu_map_valid_size; j++) { |
| 141 | 2875 if (cpu_map[j] != 0) { |
|
462
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|
2876 for (size_t k = 0; k < BitsPerCLong; k++) { |
| 141 | 2877 if (cpu_map[j] & (1UL << k)) { |
|
462
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|
2878 cpu_to_node()->at_put(j * BitsPerCLong + k, i); |
| 141 | 2879 } |
| 2880 } | |
| 2881 } | |
| 2882 } | |
| 2883 } | |
| 2884 } | |
| 6197 | 2885 FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); |
| 141 | 2886 } |
| 2887 | |
| 2888 int os::Linux::get_node_by_cpu(int cpu_id) { | |
| 2889 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { | |
| 2890 return cpu_to_node()->at(cpu_id); | |
| 2891 } | |
| 2892 return -1; | |
| 2893 } | |
| 2894 | |
| 2895 GrowableArray<int>* os::Linux::_cpu_to_node; | |
| 2896 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; | |
| 2897 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; | |
| 2898 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; | |
| 2899 os::Linux::numa_available_func_t os::Linux::_numa_available; | |
| 2900 os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory; | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2901 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; |
|
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2902 os::Linux::numa_set_bind_policy_func_t os::Linux::_numa_set_bind_policy; |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2903 unsigned long* os::Linux::_numa_all_nodes; |
| 141 | 2904 |
| 6197 | 2905 bool os::pd_uncommit_memory(char* addr, size_t size) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2906 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2907 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2908 return res != (uintptr_t) MAP_FAILED; |
| 0 | 2909 } |
| 2910 | |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
2911 static |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2912 address get_stack_commited_bottom(address bottom, size_t size) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2913 address nbot = bottom; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2914 address ntop = bottom + size; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2915 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2916 size_t page_sz = os::vm_page_size(); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2917 unsigned pages = size / page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2918 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2919 unsigned char vec[1]; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2920 unsigned imin = 1, imax = pages + 1, imid; |
| 17765 | 2921 int mincore_return_value = 0; |
| 2922 | |
| 2923 assert(imin <= imax, "Unexpected page size"); | |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2924 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2925 while (imin < imax) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2926 imid = (imax + imin) / 2; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2927 nbot = ntop - (imid * page_sz); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2928 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2929 // Use a trick with mincore to check whether the page is mapped or not. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2930 // mincore sets vec to 1 if page resides in memory and to 0 if page |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2931 // is swapped output but if page we are asking for is unmapped |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2932 // it returns -1,ENOMEM |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2933 mincore_return_value = mincore(nbot, page_sz, vec); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2934 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2935 if (mincore_return_value == -1) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2936 // Page is not mapped go up |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2937 // to find first mapped page |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2938 if (errno != EAGAIN) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2939 assert(errno == ENOMEM, "Unexpected mincore errno"); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2940 imax = imid; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2941 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2942 } else { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2943 // Page is mapped go down |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2944 // to find first not mapped page |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2945 imin = imid + 1; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2946 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2947 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2948 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2949 nbot = nbot + page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2950 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2951 // Adjust stack bottom one page up if last checked page is not mapped |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2952 if (mincore_return_value == -1) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2953 nbot = nbot + page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2954 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2955 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2956 return nbot; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2957 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2958 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2959 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2960 // Linux uses a growable mapping for the stack, and if the mapping for |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2961 // the stack guard pages is not removed when we detach a thread the |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2962 // stack cannot grow beyond the pages where the stack guard was |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2963 // mapped. If at some point later in the process the stack expands to |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2964 // that point, the Linux kernel cannot expand the stack any further |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2965 // because the guard pages are in the way, and a segfault occurs. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2966 // |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2967 // However, it's essential not to split the stack region by unmapping |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2968 // a region (leaving a hole) that's already part of the stack mapping, |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2969 // so if the stack mapping has already grown beyond the guard pages at |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2970 // the time we create them, we have to truncate the stack mapping. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2971 // So, we need to know the extent of the stack mapping when |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2972 // create_stack_guard_pages() is called. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2973 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2974 // We only need this for stacks that are growable: at the time of |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2975 // writing thread stacks don't use growable mappings (i.e. those |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2976 // creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2977 // only applies to the main thread. |
|
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2978 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2979 // If the (growable) stack mapping already extends beyond the point |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2980 // where we're going to put our guard pages, truncate the mapping at |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2981 // that point by munmap()ping it. This ensures that when we later |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2982 // munmap() the guard pages we don't leave a hole in the stack |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2983 // mapping. This only affects the main/initial thread |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2984 |
| 6197 | 2985 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2986 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2987 if (os::Linux::is_initial_thread()) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2988 // As we manually grow stack up to bottom inside create_attached_thread(), |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2989 // it's likely that os::Linux::initial_thread_stack_bottom is mapped and |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2990 // we don't need to do anything special. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2991 // Check it first, before calling heavy function. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2992 uintptr_t stack_extent = (uintptr_t) os::Linux::initial_thread_stack_bottom(); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2993 unsigned char vec[1]; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2994 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2995 if (mincore((address)stack_extent, os::vm_page_size(), vec) == -1) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2996 // Fallback to slow path on all errors, including EAGAIN |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2997 stack_extent = (uintptr_t) get_stack_commited_bottom( |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2998 os::Linux::initial_thread_stack_bottom(), |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2999 (size_t)addr - stack_extent); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3000 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3001 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3002 if (stack_extent < (uintptr_t)addr) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3003 ::munmap((void*)stack_extent, (uintptr_t)(addr - stack_extent)); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3004 } |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3005 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3006 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3007 return os::commit_memory(addr, size, !ExecMem); |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3008 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3009 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3010 // If this is a growable mapping, remove the guard pages entirely by |
|
1750
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
3011 // munmap()ping them. If not, just call uncommit_memory(). This only |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
3012 // affects the main/initial thread, but guard against future OS changes |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3013 // It's safe to always unmap guard pages for initial thread because we |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3014 // always place it right after end of the mapped region |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3015 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3016 bool os::remove_stack_guard_pages(char* addr, size_t size) { |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3017 uintptr_t stack_extent, stack_base; |
|
12144
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|
3018 |
|
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|
3019 if (os::Linux::is_initial_thread()) { |
|
1320
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6929067: Stack guard pages should be removed when thread is detached
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1123
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|
3020 return ::munmap(addr, size) == 0; |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
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1123
diff
changeset
|
3021 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
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|
3022 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
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|
3023 return os::uncommit_memory(addr, size); |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
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|
3024 } |
|
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6929067: Stack guard pages should be removed when thread is detached
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|
3025 |
| 0 | 3026 static address _highest_vm_reserved_address = NULL; |
| 3027 | |
| 3028 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory | |
| 3029 // at 'requested_addr'. If there are existing memory mappings at the same | |
| 3030 // location, however, they will be overwritten. If 'fixed' is false, | |
| 3031 // 'requested_addr' is only treated as a hint, the return value may or | |
| 3032 // may not start from the requested address. Unlike Linux mmap(), this | |
| 3033 // function returns NULL to indicate failure. | |
| 3034 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { | |
| 3035 char * addr; | |
| 3036 int flags; | |
| 3037 | |
| 3038 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; | |
| 3039 if (fixed) { | |
| 3040 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); | |
| 3041 flags |= MAP_FIXED; | |
| 3042 } | |
| 3043 | |
| 10157 | 3044 // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
| 3045 // touch an uncommitted page. Otherwise, the read/write might | |
| 3046 // succeed if we have enough swap space to back the physical page. | |
| 3047 addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, | |
| 0 | 3048 flags, -1, 0); |
| 3049 | |
| 3050 if (addr != MAP_FAILED) { | |
| 3051 // anon_mmap() should only get called during VM initialization, | |
| 3052 // don't need lock (actually we can skip locking even it can be called | |
| 3053 // from multiple threads, because _highest_vm_reserved_address is just a | |
| 3054 // hint about the upper limit of non-stack memory regions.) | |
| 3055 if ((address)addr + bytes > _highest_vm_reserved_address) { | |
| 3056 _highest_vm_reserved_address = (address)addr + bytes; | |
| 3057 } | |
| 3058 } | |
| 3059 | |
| 3060 return addr == MAP_FAILED ? NULL : addr; | |
| 3061 } | |
| 3062 | |
|
24007
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3063 // Allocate (using mmap, NO_RESERVE, with small pages) at either a given request address |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3064 // (req_addr != NULL) or with a given alignment. |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3065 // - bytes shall be a multiple of alignment. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3066 // - req_addr can be NULL. If not NULL, it must be a multiple of alignment. |
|
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|
3067 // - alignment sets the alignment at which memory shall be allocated. |
|
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|
3068 // It must be a multiple of allocation granularity. |
|
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|
3069 // Returns address of memory or NULL. If req_addr was not NULL, will only return |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3070 // req_addr or NULL. |
|
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|
3071 static char* anon_mmap_aligned(size_t bytes, size_t alignment, char* req_addr) { |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3072 |
|
776cb7cbe2e4
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|
3073 size_t extra_size = bytes; |
|
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|
3074 if (req_addr == NULL && alignment > 0) { |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3075 extra_size += alignment; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3076 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3077 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3078 char* start = (char*) ::mmap(req_addr, extra_size, PROT_NONE, |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3079 MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
|
776cb7cbe2e4
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changeset
|
3080 -1, 0); |
|
776cb7cbe2e4
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changeset
|
3081 if (start == MAP_FAILED) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3082 start = NULL; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3083 } else { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3084 if (req_addr != NULL) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3085 if (start != req_addr) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3086 ::munmap(start, extra_size); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3087 start = NULL; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3088 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3089 } else { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3090 char* const start_aligned = (char*) align_ptr_up(start, alignment); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3091 char* const end_aligned = start_aligned + bytes; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3092 char* const end = start + extra_size; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3093 if (start_aligned > start) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3094 ::munmap(start, start_aligned - start); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3095 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3096 if (end_aligned < end) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3097 ::munmap(end_aligned, end - end_aligned); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3098 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3099 start = start_aligned; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3100 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3101 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3102 return start; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3103 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3104 |
| 0 | 3105 // Don't update _highest_vm_reserved_address, because there might be memory |
| 3106 // regions above addr + size. If so, releasing a memory region only creates | |
| 3107 // a hole in the address space, it doesn't help prevent heap-stack collision. | |
| 3108 // | |
| 3109 static int anon_munmap(char * addr, size_t size) { | |
| 3110 return ::munmap(addr, size) == 0; | |
| 3111 } | |
| 3112 | |
| 6197 | 3113 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
| 0 | 3114 size_t alignment_hint) { |
| 3115 return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); | |
| 3116 } | |
| 3117 | |
| 6197 | 3118 bool os::pd_release_memory(char* addr, size_t size) { |
| 0 | 3119 return anon_munmap(addr, size); |
| 3120 } | |
| 3121 | |
| 3122 static address highest_vm_reserved_address() { | |
| 3123 return _highest_vm_reserved_address; | |
| 3124 } | |
| 3125 | |
| 3126 static bool linux_mprotect(char* addr, size_t size, int prot) { | |
| 3127 // Linux wants the mprotect address argument to be page aligned. | |
| 3128 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); | |
| 3129 | |
| 3130 // According to SUSv3, mprotect() should only be used with mappings | |
| 3131 // established by mmap(), and mmap() always maps whole pages. Unaligned | |
| 3132 // 'addr' likely indicates problem in the VM (e.g. trying to change | |
| 3133 // protection of malloc'ed or statically allocated memory). Check the | |
| 3134 // caller if you hit this assert. | |
| 3135 assert(addr == bottom, "sanity check"); | |
| 3136 | |
| 3137 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); | |
| 3138 return ::mprotect(bottom, size, prot) == 0; | |
| 3139 } | |
| 3140 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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|
3141 // Set protections specified |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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changeset
|
3142 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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|
3143 bool is_committed) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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235
diff
changeset
|
3144 unsigned int p = 0; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
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235
diff
changeset
|
3145 switch (prot) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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diff
changeset
|
3146 case MEM_PROT_NONE: p = PROT_NONE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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|
3147 case MEM_PROT_READ: p = PROT_READ; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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changeset
|
3148 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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|
3149 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
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diff
changeset
|
3150 default: |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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diff
changeset
|
3151 ShouldNotReachHere(); |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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diff
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|
3152 } |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
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changeset
|
3153 // is_committed is unused. |
|
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changeset
|
3154 return linux_mprotect(addr, bytes, p); |
| 0 | 3155 } |
| 3156 | |
| 3157 bool os::guard_memory(char* addr, size_t size) { | |
| 3158 return linux_mprotect(addr, size, PROT_NONE); | |
| 3159 } | |
| 3160 | |
| 3161 bool os::unguard_memory(char* addr, size_t size) { | |
|
477
24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
coleenp
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462
diff
changeset
|
3162 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); |
| 0 | 3163 } |
| 3164 | |
|
12110
4c84d351cca9
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changeset
|
3165 bool os::Linux::transparent_huge_pages_sanity_check(bool warn, size_t page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3166 bool result = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3167 void *p = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3168 MAP_ANONYMOUS|MAP_PRIVATE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3169 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3170 if (p != MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3171 void *aligned_p = align_ptr_up(p, page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3172 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3173 result = madvise(aligned_p, page_size, MADV_HUGEPAGE) == 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3174 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3175 munmap(p, page_size * 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3176 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3177 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3178 if (warn && !result) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3179 warning("TransparentHugePages is not supported by the operating system."); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3180 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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11092
diff
changeset
|
3181 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3182 return result; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3183 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3184 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3185 bool os::Linux::hugetlbfs_sanity_check(bool warn, size_t page_size) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3186 bool result = false; |
|
12110
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11092
diff
changeset
|
3187 void *p = mmap(NULL, page_size, PROT_READ|PROT_WRITE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3188 MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3189 -1, 0); |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3190 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3191 if (p != MAP_FAILED) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3192 // We don't know if this really is a huge page or not. |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3193 FILE *fp = fopen("/proc/self/maps", "r"); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3194 if (fp) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3195 while (!feof(fp)) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3196 char chars[257]; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3197 long x = 0; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3198 if (fgets(chars, sizeof(chars), fp)) { |
| 3358 | 3199 if (sscanf(chars, "%lx-%*x", &x) == 1 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3200 && x == (long)p) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3201 if (strstr (chars, "hugepage")) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3202 result = true; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3203 break; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3204 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3205 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3206 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3207 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3208 fclose(fp); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3209 } |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3210 munmap(p, page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3211 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3212 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3213 if (warn && !result) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3214 warning("HugeTLBFS is not supported by the operating system."); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3215 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3216 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3217 return result; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3218 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3219 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3220 /* |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3221 * Set the coredump_filter bits to include largepages in core dump (bit 6) |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3222 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3223 * From the coredump_filter documentation: |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3224 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3225 * - (bit 0) anonymous private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3226 * - (bit 1) anonymous shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3227 * - (bit 2) file-backed private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3228 * - (bit 3) file-backed shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3229 * - (bit 4) ELF header pages in file-backed private memory areas (it is |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3230 * effective only if the bit 2 is cleared) |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3231 * - (bit 5) hugetlb private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3232 * - (bit 6) hugetlb shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3233 */ |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3234 static void set_coredump_filter(void) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3235 FILE *f; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3236 long cdm; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3237 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3238 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3239 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3240 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3241 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3242 if (fscanf(f, "%lx", &cdm) != 1) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3243 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3244 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3245 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3246 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3247 rewind(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3248 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3249 if ((cdm & LARGEPAGES_BIT) == 0) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3250 cdm |= LARGEPAGES_BIT; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3251 fprintf(f, "%#lx", cdm); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3252 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3253 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3254 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3255 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3256 |
| 0 | 3257 // Large page support |
| 3258 | |
| 3259 static size_t _large_page_size = 0; | |
| 3260 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3261 size_t os::Linux::find_large_page_size() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3262 size_t large_page_size = 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3263 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3264 // large_page_size on Linux is used to round up heap size. x86 uses either |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3265 // 2M or 4M page, depending on whether PAE (Physical Address Extensions) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3266 // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3267 // page as large as 256M. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3268 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3269 // Here we try to figure out page size by parsing /proc/meminfo and looking |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3270 // for a line with the following format: |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3271 // Hugepagesize: 2048 kB |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3272 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3273 // If we can't determine the value (e.g. /proc is not mounted, or the text |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3274 // format has been changed), we'll use the largest page size supported by |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3275 // the processor. |
| 0 | 3276 |
| 1010 | 3277 #ifndef ZERO |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3278 large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3279 ARM_ONLY(2 * M) PPC_ONLY(4 * M); |
| 1010 | 3280 #endif // ZERO |
| 0 | 3281 |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3282 FILE *fp = fopen("/proc/meminfo", "r"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3283 if (fp) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3284 while (!feof(fp)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3285 int x = 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3286 char buf[16]; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3287 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3288 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3289 large_page_size = x * K; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3290 break; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3291 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3292 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3293 // skip to next line |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3294 for (;;) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3295 int ch = fgetc(fp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3296 if (ch == EOF || ch == (int)'\n') break; |
| 0 | 3297 } |
| 3298 } | |
| 3299 } | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3300 fclose(fp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3301 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3302 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3303 if (!FLAG_IS_DEFAULT(LargePageSizeInBytes) && LargePageSizeInBytes != large_page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3304 warning("Setting LargePageSizeInBytes has no effect on this OS. Large page size is " |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3305 SIZE_FORMAT "%s.", byte_size_in_proper_unit(large_page_size), |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3306 proper_unit_for_byte_size(large_page_size)); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3307 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3308 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3309 return large_page_size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3310 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3311 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3312 size_t os::Linux::setup_large_page_size() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3313 _large_page_size = Linux::find_large_page_size(); |
| 0 | 3314 const size_t default_page_size = (size_t)Linux::page_size(); |
| 3315 if (_large_page_size > default_page_size) { | |
| 3316 _page_sizes[0] = _large_page_size; | |
| 3317 _page_sizes[1] = default_page_size; | |
| 3318 _page_sizes[2] = 0; | |
| 3319 } | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3320 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3321 return _large_page_size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3322 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3323 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3324 bool os::Linux::setup_large_page_type(size_t page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3325 if (FLAG_IS_DEFAULT(UseHugeTLBFS) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3326 FLAG_IS_DEFAULT(UseSHM) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3327 FLAG_IS_DEFAULT(UseTransparentHugePages)) { |
|
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3328 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3329 // The type of large pages has not been specified by the user. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3330 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3331 // Try UseHugeTLBFS and then UseSHM. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3332 UseHugeTLBFS = UseSHM = true; |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3333 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3334 // Don't try UseTransparentHugePages since there are known |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3335 // performance issues with it turned on. This might change in the future. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3336 UseTransparentHugePages = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3337 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3338 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3339 if (UseTransparentHugePages) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3340 bool warn_on_failure = !FLAG_IS_DEFAULT(UseTransparentHugePages); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3341 if (transparent_huge_pages_sanity_check(warn_on_failure, page_size)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3342 UseHugeTLBFS = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3343 UseSHM = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3344 return true; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3345 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3346 UseTransparentHugePages = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3347 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3348 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3349 if (UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3350 bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3351 if (hugetlbfs_sanity_check(warn_on_failure, page_size)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3352 UseSHM = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3353 return true; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3354 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3355 UseHugeTLBFS = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3356 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3357 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3358 return UseSHM; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3359 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3360 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3361 void os::large_page_init() { |
|
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3362 if (!UseLargePages && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3363 !UseTransparentHugePages && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3364 !UseHugeTLBFS && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3365 !UseSHM) { |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
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diff
changeset
|
3366 // Not using large pages. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3367 return; |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3368 } |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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12252
diff
changeset
|
3369 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3370 if (!FLAG_IS_DEFAULT(UseLargePages) && !UseLargePages) { |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3371 // The user explicitly turned off large pages. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3372 // Ignore the rest of the large pages flags. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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changeset
|
3373 UseTransparentHugePages = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3374 UseHugeTLBFS = false; |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3375 UseSHM = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3376 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3377 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3378 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3379 size_t large_page_size = Linux::setup_large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3380 UseLargePages = Linux::setup_large_page_type(large_page_size); |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3381 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3382 set_coredump_filter(); |
| 0 | 3383 } |
| 3384 | |
| 3385 #ifndef SHM_HUGETLB | |
| 3386 #define SHM_HUGETLB 04000 | |
| 3387 #endif | |
| 3388 | |
|
24007
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3389 #define shm_warning_format(format, ...) \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3390 do { \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3391 if (UseLargePages && \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3392 (!FLAG_IS_DEFAULT(UseLargePages) || \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3393 !FLAG_IS_DEFAULT(UseSHM) || \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3394 !FLAG_IS_DEFAULT(LargePageSizeInBytes))) { \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3395 warning(format, __VA_ARGS__); \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3396 } \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3397 } while (0) |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3398 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3399 #define shm_warning(str) shm_warning_format("%s", str) |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3400 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3401 #define shm_warning_with_errno(str) \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3402 do { \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3403 int err = errno; \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3404 shm_warning_format(str " (error = %d)", err); \ |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3405 } while (0) |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3406 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3407 static char* shmat_with_alignment(int shmid, size_t bytes, size_t alignment) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3408 assert(is_size_aligned(bytes, alignment), "Must be divisible by the alignment"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3409 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3410 if (!is_size_aligned(alignment, SHMLBA)) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3411 assert(false, "Code below assumes that alignment is at least SHMLBA aligned"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3412 return NULL; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3413 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3414 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3415 // To ensure that we get 'alignment' aligned memory from shmat, |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3416 // we pre-reserve aligned virtual memory and then attach to that. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3417 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3418 char* pre_reserved_addr = anon_mmap_aligned(bytes, alignment, NULL); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3419 if (pre_reserved_addr == NULL) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3420 // Couldn't pre-reserve aligned memory. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3421 shm_warning("Failed to pre-reserve aligned memory for shmat."); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3422 return NULL; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3423 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3424 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3425 // SHM_REMAP is needed to allow shmat to map over an existing mapping. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3426 char* addr = (char*)shmat(shmid, pre_reserved_addr, SHM_REMAP); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3427 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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24006
diff
changeset
|
3428 if ((intptr_t)addr == -1) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3429 int err = errno; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3430 shm_warning_with_errno("Failed to attach shared memory."); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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changeset
|
3431 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3432 assert(err != EACCES, "Unexpected error"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3433 assert(err != EIDRM, "Unexpected error"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3434 assert(err != EINVAL, "Unexpected error"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3435 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
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diff
changeset
|
3436 // Since we don't know if the kernel unmapped the pre-reserved memory area |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3437 // we can't unmap it, since that would potentially unmap memory that was |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3438 // mapped from other threads. |
|
776cb7cbe2e4
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|
3439 return NULL; |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3440 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3441 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3442 return addr; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3443 } |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3444 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3445 static char* shmat_at_address(int shmid, char* req_addr) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3446 if (!is_ptr_aligned(req_addr, SHMLBA)) { |
|
776cb7cbe2e4
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|
3447 assert(false, "Requested address needs to be SHMLBA aligned"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3448 return NULL; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3449 } |
|
776cb7cbe2e4
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|
3450 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3451 char* addr = (char*)shmat(shmid, req_addr, 0); |
|
776cb7cbe2e4
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|
3452 |
|
776cb7cbe2e4
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|
3453 if ((intptr_t)addr == -1) { |
|
776cb7cbe2e4
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|
3454 shm_warning_with_errno("Failed to attach shared memory."); |
|
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|
3455 return NULL; |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3456 } |
|
776cb7cbe2e4
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|
3457 |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3458 return addr; |
|
776cb7cbe2e4
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|
3459 } |
|
776cb7cbe2e4
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|
3460 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3461 static char* shmat_large_pages(int shmid, size_t bytes, size_t alignment, char* req_addr) { |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3462 // If a req_addr has been provided, we assume that the caller has already aligned the address. |
|
776cb7cbe2e4
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|
3463 if (req_addr != NULL) { |
|
776cb7cbe2e4
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changeset
|
3464 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Must be divisible by the large page size"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3465 assert(is_ptr_aligned(req_addr, alignment), "Must be divisible by given alignment"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3466 return shmat_at_address(shmid, req_addr); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3467 } |
|
776cb7cbe2e4
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|
3468 |
|
776cb7cbe2e4
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|
3469 // Since shmid has been setup with SHM_HUGETLB, shmat will automatically |
|
776cb7cbe2e4
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changeset
|
3470 // return large page size aligned memory addresses when req_addr == NULL. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3471 // However, if the alignment is larger than the large page size, we have |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3472 // to manually ensure that the memory returned is 'alignment' aligned. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3473 if (alignment > os::large_page_size()) { |
|
776cb7cbe2e4
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|
3474 assert(is_size_aligned(alignment, os::large_page_size()), "Must be divisible by the large page size"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3475 return shmat_with_alignment(shmid, bytes, alignment); |
|
776cb7cbe2e4
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|
3476 } else { |
|
776cb7cbe2e4
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changeset
|
3477 return shmat_at_address(shmid, NULL); |
|
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8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3478 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3479 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3480 |
|
12110
4c84d351cca9
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changeset
|
3481 char* os::Linux::reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
| 656 | 3482 // "exec" is passed in but not used. Creating the shared image for |
| 3483 // the code cache doesn't have an SHM_X executable permission to check. | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3484 assert(UseLargePages && UseSHM, "only for SHM large pages"); |
|
12110
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|
3485 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
|
24007
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3486 assert(is_ptr_aligned(req_addr, alignment), "Unaligned address"); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3487 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3488 if (!is_size_aligned(bytes, os::large_page_size())) { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
3489 return NULL; // Fallback to small pages. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3490 } |
| 0 | 3491 |
| 3492 // Create a large shared memory region to attach to based on size. | |
|
24007
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3493 // Currently, size is the total size of the heap. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3494 int shmid = shmget(IPC_PRIVATE, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); |
| 0 | 3495 if (shmid == -1) { |
|
24007
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3496 // Possible reasons for shmget failure: |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3497 // 1. shmmax is too small for Java heap. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3498 // > check shmmax value: cat /proc/sys/kernel/shmmax |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3499 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3500 // 2. not enough large page memory. |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3501 // > check available large pages: cat /proc/meminfo |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3502 // > increase amount of large pages: |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3503 // echo new_value > /proc/sys/vm/nr_hugepages |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3504 // Note 1: different Linux may use different name for this property, |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3505 // e.g. on Redhat AS-3 it is "hugetlb_pool". |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3506 // Note 2: it's possible there's enough physical memory available but |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3507 // they are so fragmented after a long run that they can't |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3508 // coalesce into large pages. Try to reserve large pages when |
|
776cb7cbe2e4
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changeset
|
3509 // the system is still "fresh". |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3510 shm_warning_with_errno("Failed to reserve shared memory."); |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3511 return NULL; |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3512 } |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3513 |
|
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3514 // Attach to the region. |
|
776cb7cbe2e4
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changeset
|
3515 char* addr = shmat_large_pages(shmid, bytes, alignment, req_addr); |
| 0 | 3516 |
| 3517 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3518 // will be deleted when it's detached by shmdt() or when the process | |
| 3519 // terminates. If shmat() is not successful this will remove the shared | |
| 3520 // segment immediately. | |
| 3521 shmctl(shmid, IPC_RMID, NULL); | |
| 3522 | |
|
12110
4c84d351cca9
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diff
changeset
|
3523 return addr; |
|
4c84d351cca9
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diff
changeset
|
3524 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3525 |
|
4c84d351cca9
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diff
changeset
|
3526 static void warn_on_large_pages_failure(char* req_addr, size_t bytes, int error) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3527 assert(error == ENOMEM, "Only expect to fail if no memory is available"); |
|
4c84d351cca9
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changeset
|
3528 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3529 bool warn_on_failure = UseLargePages && |
|
4c84d351cca9
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changeset
|
3530 (!FLAG_IS_DEFAULT(UseLargePages) || |
|
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changeset
|
3531 !FLAG_IS_DEFAULT(UseHugeTLBFS) || |
|
4c84d351cca9
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changeset
|
3532 !FLAG_IS_DEFAULT(LargePageSizeInBytes)); |
|
4c84d351cca9
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changeset
|
3533 |
|
4c84d351cca9
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diff
changeset
|
3534 if (warn_on_failure) { |
|
4c84d351cca9
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stefank
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diff
changeset
|
3535 char msg[128]; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3536 jio_snprintf(msg, sizeof(msg), "Failed to reserve large pages memory req_addr: " |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3537 PTR_FORMAT " bytes: " SIZE_FORMAT " (errno = %d).", req_addr, bytes, error); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
3538 warning("%s", msg); |
|
12110
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changeset
|
3539 } |
|
4c84d351cca9
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diff
changeset
|
3540 } |
|
4c84d351cca9
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diff
changeset
|
3541 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3542 char* os::Linux::reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec) { |
|
4c84d351cca9
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changeset
|
3543 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
|
4c84d351cca9
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changeset
|
3544 assert(is_size_aligned(bytes, os::large_page_size()), "Unaligned size"); |
|
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diff
changeset
|
3545 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3546 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
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diff
changeset
|
3547 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3548 char* addr = (char*)::mmap(req_addr, bytes, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3549 MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3550 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3551 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3552 if (addr == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3553 warn_on_large_pages_failure(req_addr, bytes, errno); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3554 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3555 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3556 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3557 assert(is_ptr_aligned(addr, os::large_page_size()), "Must be"); |
|
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3558 |
| 0 | 3559 return addr; |
| 3560 } | |
| 3561 | |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3562 // Reserve memory using mmap(MAP_HUGETLB). |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
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diff
changeset
|
3563 // - bytes shall be a multiple of alignment. |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3564 // - req_addr can be NULL. If not NULL, it must be a multiple of alignment. |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
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diff
changeset
|
3565 // - alignment sets the alignment at which memory shall be allocated. |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3566 // It must be a multiple of allocation granularity. |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3567 // Returns address of memory or NULL. If req_addr was not NULL, will only return |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3568 // req_addr or NULL. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3569 char* os::Linux::reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3570 size_t large_page_size = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3571 assert(bytes >= large_page_size, "Shouldn't allocate large pages for small sizes"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3572 |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3573 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3574 assert(is_size_aligned(bytes, alignment), "Must be"); |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3575 |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3576 // First reserve - but not commit - the address range in small pages. |
|
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3577 char* const start = anon_mmap_aligned(bytes, alignment, req_addr); |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3578 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3579 if (start == NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3580 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3581 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3582 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3583 assert(is_ptr_aligned(start, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3584 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3585 char* end = start + bytes; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3586 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3587 // Find the regions of the allocated chunk that can be promoted to large pages. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3588 char* lp_start = (char*)align_ptr_up(start, large_page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3589 char* lp_end = (char*)align_ptr_down(end, large_page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3590 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3591 size_t lp_bytes = lp_end - lp_start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3592 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3593 assert(is_size_aligned(lp_bytes, large_page_size), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3594 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3595 if (lp_bytes == 0) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3596 // The mapped region doesn't even span the start and the end of a large page. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3597 // Fall back to allocate a non-special area. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3598 ::munmap(start, end - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3599 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3600 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3601 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3602 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3603 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3604 void* result; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3605 |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3606 // Commit small-paged leading area. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3607 if (start != lp_start) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3608 result = ::mmap(start, lp_start - start, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3609 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3610 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3611 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3612 ::munmap(lp_start, end - lp_start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3613 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3614 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3615 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3616 |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3617 // Commit large-paged area. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3618 result = ::mmap(lp_start, lp_bytes, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3619 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3620 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3621 if (result == MAP_FAILED) { |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3622 warn_on_large_pages_failure(lp_start, lp_bytes, errno); |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3623 // If the mmap above fails, the large pages region will be unmapped and we |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3624 // have regions before and after with small pages. Release these regions. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3625 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3626 // | mapped | unmapped | mapped | |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3627 // ^ ^ ^ ^ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3628 // start lp_start lp_end end |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3629 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3630 ::munmap(start, lp_start - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3631 ::munmap(lp_end, end - lp_end); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3632 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3633 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3634 |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3635 // Commit small-paged trailing area. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3636 if (lp_end != end) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3637 result = ::mmap(lp_end, end - lp_end, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3638 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3639 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3640 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3641 ::munmap(start, lp_end - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3642 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3643 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3644 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3645 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3646 return start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3647 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3648 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3649 char* os::Linux::reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3650 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3651 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
|
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3652 assert(is_size_aligned(alignment, os::vm_allocation_granularity()), "Must be"); |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3653 assert(is_power_of_2(os::large_page_size()), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3654 assert(bytes >= os::large_page_size(), "Shouldn't allocate large pages for small sizes"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3655 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3656 if (is_size_aligned(bytes, os::large_page_size()) && alignment <= os::large_page_size()) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3657 return reserve_memory_special_huge_tlbfs_only(bytes, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3658 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3659 return reserve_memory_special_huge_tlbfs_mixed(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3660 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3661 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3662 |
|
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8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3663 char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
|
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|
3664 assert(UseLargePages, "only for large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3665 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3666 char* addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3667 if (UseSHM) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3668 addr = os::Linux::reserve_memory_special_shm(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3669 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3670 assert(UseHugeTLBFS, "must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3671 addr = os::Linux::reserve_memory_special_huge_tlbfs(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3672 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3673 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3674 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
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|
3675 if (UseNUMAInterleaving) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3676 numa_make_global(addr, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3677 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3678 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3679 // The memory is committed |
| 20360 | 3680 MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, CALLER_PC); |
|
12110
4c84d351cca9
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changeset
|
3681 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3682 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3683 return addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3684 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3685 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3686 bool os::Linux::release_memory_special_shm(char* base, size_t bytes) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3687 // detaching the SHM segment will also delete it, see reserve_memory_special_shm() |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
3688 return shmdt(base) == 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3689 } |
|
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diff
changeset
|
3690 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3691 bool os::Linux::release_memory_special_huge_tlbfs(char* base, size_t bytes) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
3692 return pd_release_memory(base, bytes); |
|
4c84d351cca9
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diff
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|
3693 } |
|
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|
3694 |
| 0 | 3695 bool os::release_memory_special(char* base, size_t bytes) { |
| 20360 | 3696 bool res; |
| 3697 if (MemTracker::tracking_level() > NMT_minimal) { | |
| 3698 Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); | |
| 3699 res = os::Linux::release_memory_special_impl(base, bytes); | |
| 3700 if (res) { | |
| 3701 tkr.record((address)base, bytes); | |
| 3702 } | |
| 3703 | |
| 3704 } else { | |
| 3705 res = os::Linux::release_memory_special_impl(base, bytes); | |
| 3706 } | |
| 3707 return res; | |
| 3708 } | |
| 3709 | |
| 3710 bool os::Linux::release_memory_special_impl(char* base, size_t bytes) { | |
|
12110
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|
3711 assert(UseLargePages, "only for large pages"); |
|
4c84d351cca9
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|
3712 bool res; |
| 20360 | 3713 |
|
12110
4c84d351cca9
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|
3714 if (UseSHM) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3715 res = os::Linux::release_memory_special_shm(base, bytes); |
|
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|
3716 } else { |
|
4c84d351cca9
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changeset
|
3717 assert(UseHugeTLBFS, "must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
3718 res = os::Linux::release_memory_special_huge_tlbfs(base, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
3719 } |
|
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changeset
|
3720 return res; |
| 0 | 3721 } |
| 3722 | |
| 3723 size_t os::large_page_size() { | |
| 3724 return _large_page_size; | |
| 3725 } | |
| 3726 | |
|
12110
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changeset
|
3727 // With SysV SHM the entire memory region must be allocated as shared |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3728 // memory. |
|
12110
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8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3729 // HugeTLBFS allows application to commit large page memory on demand. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3730 // However, when committing memory with HugeTLBFS fails, the region |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3731 // that was supposed to be committed will lose the old reservation |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3732 // and allow other threads to steal that memory region. Because of this |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3733 // behavior we can't commit HugeTLBFS memory. |
| 0 | 3734 bool os::can_commit_large_page_memory() { |
|
12110
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|
3735 return UseTransparentHugePages; |
| 0 | 3736 } |
| 3737 | |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3738 bool os::can_execute_large_page_memory() { |
|
12110
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8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3739 return UseTransparentHugePages || UseHugeTLBFS; |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3740 } |
|
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
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diff
changeset
|
3741 |
| 0 | 3742 // Reserve memory at an arbitrary address, only if that area is |
| 3743 // available (and not reserved for something else). | |
| 3744 | |
| 6197 | 3745 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
| 0 | 3746 const int max_tries = 10; |
| 3747 char* base[max_tries]; | |
| 3748 size_t size[max_tries]; | |
| 3749 const size_t gap = 0x000000; | |
| 3750 | |
| 3751 // Assert only that the size is a multiple of the page size, since | |
| 3752 // that's all that mmap requires, and since that's all we really know | |
| 3753 // about at this low abstraction level. If we need higher alignment, | |
| 3754 // we can either pass an alignment to this method or verify alignment | |
| 3755 // in one of the methods further up the call chain. See bug 5044738. | |
| 3756 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 3757 | |
| 3758 // Repeatedly allocate blocks until the block is allocated at the | |
| 3759 // right spot. Give up after max_tries. Note that reserve_memory() will | |
| 3760 // automatically update _highest_vm_reserved_address if the call is | |
| 3761 // successful. The variable tracks the highest memory address every reserved | |
| 3762 // by JVM. It is used to detect heap-stack collision if running with | |
| 3763 // fixed-stack LinuxThreads. Because here we may attempt to reserve more | |
| 3764 // space than needed, it could confuse the collision detecting code. To | |
| 3765 // solve the problem, save current _highest_vm_reserved_address and | |
| 3766 // calculate the correct value before return. | |
| 3767 address old_highest = _highest_vm_reserved_address; | |
| 3768 | |
| 3769 // Linux mmap allows caller to pass an address as hint; give it a try first, | |
| 3770 // if kernel honors the hint then we can return immediately. | |
| 3771 char * addr = anon_mmap(requested_addr, bytes, false); | |
| 3772 if (addr == requested_addr) { | |
| 3773 return requested_addr; | |
| 3774 } | |
| 3775 | |
| 3776 if (addr != NULL) { | |
| 3777 // mmap() is successful but it fails to reserve at the requested address | |
| 3778 anon_munmap(addr, bytes); | |
| 3779 } | |
| 3780 | |
| 3781 int i; | |
| 3782 for (i = 0; i < max_tries; ++i) { | |
| 3783 base[i] = reserve_memory(bytes); | |
| 3784 | |
| 3785 if (base[i] != NULL) { | |
| 3786 // Is this the block we wanted? | |
| 3787 if (base[i] == requested_addr) { | |
| 3788 size[i] = bytes; | |
| 3789 break; | |
| 3790 } | |
| 3791 | |
| 3792 // Does this overlap the block we wanted? Give back the overlapped | |
| 3793 // parts and try again. | |
| 3794 | |
| 3795 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 3796 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 3797 unmap_memory(base[i], top_overlap); | |
| 3798 base[i] += top_overlap; | |
| 3799 size[i] = bytes - top_overlap; | |
| 3800 } else { | |
| 3801 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 3802 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 3803 unmap_memory(requested_addr, bottom_overlap); | |
| 3804 size[i] = bytes - bottom_overlap; | |
| 3805 } else { | |
| 3806 size[i] = bytes; | |
| 3807 } | |
| 3808 } | |
| 3809 } | |
| 3810 } | |
| 3811 | |
| 3812 // Give back the unused reserved pieces. | |
| 3813 | |
| 3814 for (int j = 0; j < i; ++j) { | |
| 3815 if (base[j] != NULL) { | |
| 3816 unmap_memory(base[j], size[j]); | |
| 3817 } | |
| 3818 } | |
| 3819 | |
| 3820 if (i < max_tries) { | |
| 3821 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); | |
| 3822 return requested_addr; | |
| 3823 } else { | |
| 3824 _highest_vm_reserved_address = old_highest; | |
| 3825 return NULL; | |
| 3826 } | |
| 3827 } | |
| 3828 | |
| 3829 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3830 return ::read(fd, buf, nBytes); | |
| 3831 } | |
| 3832 | |
| 3833 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. | |
| 3834 // Solaris uses poll(), linux uses park(). | |
| 3835 // Poll() is likely a better choice, assuming that Thread.interrupt() | |
| 3836 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with | |
| 3837 // SIGSEGV, see 4355769. | |
| 3838 | |
| 3839 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3840 assert(thread == Thread::current(), "thread consistency check"); | |
| 3841 | |
| 3842 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3843 slp->reset() ; | |
| 3844 OrderAccess::fence() ; | |
| 3845 | |
| 3846 if (interruptible) { | |
| 3847 jlong prevtime = javaTimeNanos(); | |
| 3848 | |
| 3849 for (;;) { | |
| 3850 if (os::is_interrupted(thread, true)) { | |
| 3851 return OS_INTRPT; | |
| 3852 } | |
| 3853 | |
| 3854 jlong newtime = javaTimeNanos(); | |
| 3855 | |
| 3856 if (newtime - prevtime < 0) { | |
| 3857 // time moving backwards, should only happen if no monotonic clock | |
| 3858 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3859 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3860 } else { | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3861 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3862 } |
| 3863 | |
| 3864 if(millis <= 0) { | |
| 3865 return OS_OK; | |
| 3866 } | |
| 3867 | |
| 3868 prevtime = newtime; | |
| 3869 | |
| 3870 { | |
| 3871 assert(thread->is_Java_thread(), "sanity check"); | |
| 3872 JavaThread *jt = (JavaThread *) thread; | |
| 3873 ThreadBlockInVM tbivm(jt); | |
| 3874 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3875 | |
| 3876 jt->set_suspend_equivalent(); | |
| 3877 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3878 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3879 | |
| 3880 slp->park(millis); | |
| 3881 | |
| 3882 // were we externally suspended while we were waiting? | |
| 3883 jt->check_and_wait_while_suspended(); | |
| 3884 } | |
| 3885 } | |
| 3886 } else { | |
| 3887 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3888 jlong prevtime = javaTimeNanos(); | |
| 3889 | |
| 3890 for (;;) { | |
| 3891 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on | |
| 3892 // the 1st iteration ... | |
| 3893 jlong newtime = javaTimeNanos(); | |
| 3894 | |
| 3895 if (newtime - prevtime < 0) { | |
| 3896 // time moving backwards, should only happen if no monotonic clock | |
| 3897 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3898 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3899 } else { | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
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4082
diff
changeset
|
3900 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3901 } |
| 3902 | |
| 3903 if(millis <= 0) break ; | |
| 3904 | |
| 3905 prevtime = newtime; | |
| 3906 slp->park(millis); | |
| 3907 } | |
| 3908 return OS_OK ; | |
| 3909 } | |
| 3910 } | |
| 3911 | |
|
14291
5944dba4badc
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14286
diff
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|
3912 // |
|
5944dba4badc
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diff
changeset
|
3913 // Short sleep, direct OS call. |
|
5944dba4badc
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14286
diff
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|
3914 // |
|
5944dba4badc
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14286
diff
changeset
|
3915 // Note: certain versions of Linux CFS scheduler (since 2.6.23) do not guarantee |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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14286
diff
changeset
|
3916 // sched_yield(2) will actually give up the CPU: |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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14286
diff
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|
3917 // |
|
5944dba4badc
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14286
diff
changeset
|
3918 // * Alone on this pariticular CPU, keeps running. |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
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14286
diff
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|
3919 // * Before the introduction of "skip_buddy" with "compat_yield" disabled |
|
5944dba4badc
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14286
diff
changeset
|
3920 // (pre 2.6.39). |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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14286
diff
changeset
|
3921 // |
|
5944dba4badc
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14286
diff
changeset
|
3922 // So calling this with 0 is an alternative. |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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14286
diff
changeset
|
3923 // |
|
5944dba4badc
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14286
diff
changeset
|
3924 void os::naked_short_sleep(jlong ms) { |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
14286
diff
changeset
|
3925 struct timespec req; |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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14286
diff
changeset
|
3926 |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
14286
diff
changeset
|
3927 assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
14286
diff
changeset
|
3928 req.tv_sec = 0; |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
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14286
diff
changeset
|
3929 if (ms > 0) { |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
14286
diff
changeset
|
3930 req.tv_nsec = (ms % 1000) * 1000000; |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
14286
diff
changeset
|
3931 } |
|
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
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14286
diff
changeset
|
3932 else { |
|
5944dba4badc
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14286
diff
changeset
|
3933 req.tv_nsec = 1; |
|
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3934 } |
|
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3935 |
|
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3936 nanosleep(&req, NULL); |
|
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3937 |
|
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|
3938 return; |
| 0 | 3939 } |
| 3940 | |
| 3941 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3942 void os::infinite_sleep() { | |
| 3943 while (true) { // sleep forever ... | |
| 3944 ::sleep(100); // ... 100 seconds at a time | |
| 3945 } | |
| 3946 } | |
| 3947 | |
| 3948 // Used to convert frequent JVM_Yield() to nops | |
| 3949 bool os::dont_yield() { | |
| 3950 return DontYieldALot; | |
| 3951 } | |
| 3952 | |
| 3953 void os::yield() { | |
| 3954 sched_yield(); | |
| 3955 } | |
| 3956 | |
| 3957 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} | |
| 3958 | |
| 3959 void os::yield_all(int attempts) { | |
| 3960 // Yields to all threads, including threads with lower priorities | |
| 3961 // Threads on Linux are all with same priority. The Solaris style | |
| 3962 // os::yield_all() with nanosleep(1ms) is not necessary. | |
| 3963 sched_yield(); | |
| 3964 } | |
| 3965 | |
| 3966 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3967 void os::loop_breaker(int attempts) { | |
| 3968 os::yield_all(attempts); | |
| 3969 } | |
| 3970 | |
| 3971 //////////////////////////////////////////////////////////////////////////////// | |
| 3972 // thread priority support | |
| 3973 | |
| 3974 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER | |
| 3975 // only supports dynamic priority, static priority must be zero. For real-time | |
| 3976 // applications, Linux supports SCHED_RR which allows static priority (1-99). | |
| 3977 // However, for large multi-threaded applications, SCHED_RR is not only slower | |
| 3978 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out | |
| 3979 // of 5 runs - Sep 2005). | |
| 3980 // | |
| 3981 // The following code actually changes the niceness of kernel-thread/LWP. It | |
| 3982 // has an assumption that setpriority() only modifies one kernel-thread/LWP, | |
| 3983 // not the entire user process, and user level threads are 1:1 mapped to kernel | |
| 3984 // threads. It has always been the case, but could change in the future. For | |
| 3985 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). | |
| 3986 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. | |
| 3987 | |
|
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3988 int os::java_to_os_priority[CriticalPriority + 1] = { |
| 0 | 3989 19, // 0 Entry should never be used |
| 3990 | |
| 3991 4, // 1 MinPriority | |
| 3992 3, // 2 | |
| 3993 2, // 3 | |
| 3994 | |
| 3995 1, // 4 | |
| 3996 0, // 5 NormPriority | |
| 3997 -1, // 6 | |
| 3998 | |
| 3999 -2, // 7 | |
| 4000 -3, // 8 | |
| 4001 -4, // 9 NearMaxPriority | |
| 4002 | |
|
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4003 -5, // 10 MaxPriority |
|
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4004 |
|
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|
4005 -5 // 11 CriticalPriority |
| 0 | 4006 }; |
| 4007 | |
| 4008 static int prio_init() { | |
| 4009 if (ThreadPriorityPolicy == 1) { | |
| 4010 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 | |
| 4011 // if effective uid is not root. Perhaps, a more elegant way of doing | |
| 4012 // this is to test CAP_SYS_NICE capability, but that will require libcap.so | |
| 4013 if (geteuid() != 0) { | |
| 4014 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { | |
| 4015 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); | |
| 4016 } | |
| 4017 ThreadPriorityPolicy = 0; | |
| 4018 } | |
| 4019 } | |
|
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4020 if (UseCriticalJavaThreadPriority) { |
|
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4021 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
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|
4022 } |
| 0 | 4023 return 0; |
| 4024 } | |
| 4025 | |
| 4026 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 4027 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; | |
| 4028 | |
| 4029 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); | |
| 4030 return (ret == 0) ? OS_OK : OS_ERR; | |
| 4031 } | |
| 4032 | |
| 4033 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 4034 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { | |
| 4035 *priority_ptr = java_to_os_priority[NormPriority]; | |
| 4036 return OS_OK; | |
| 4037 } | |
| 4038 | |
| 4039 errno = 0; | |
| 4040 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); | |
| 4041 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); | |
| 4042 } | |
| 4043 | |
| 4044 // Hint to the underlying OS that a task switch would not be good. | |
| 4045 // Void return because it's a hint and can fail. | |
| 4046 void os::hint_no_preempt() {} | |
| 4047 | |
| 4048 //////////////////////////////////////////////////////////////////////////////// | |
| 4049 // suspend/resume support | |
| 4050 | |
| 4051 // the low-level signal-based suspend/resume support is a remnant from the | |
| 4052 // old VM-suspension that used to be for java-suspension, safepoints etc, | |
| 4053 // within hotspot. Now there is a single use-case for this: | |
| 4054 // - calling get_thread_pc() on the VMThread by the flat-profiler task | |
| 4055 // that runs in the watcher thread. | |
| 4056 // The remaining code is greatly simplified from the more general suspension | |
| 4057 // code that used to be used. | |
| 4058 // | |
| 4059 // The protocol is quite simple: | |
| 4060 // - suspend: | |
| 4061 // - sends a signal to the target thread | |
| 4062 // - polls the suspend state of the osthread using a yield loop | |
| 4063 // - target thread signal handler (SR_handler) sets suspend state | |
| 4064 // and blocks in sigsuspend until continued | |
| 4065 // - resume: | |
| 4066 // - sets target osthread state to continue | |
| 4067 // - sends signal to end the sigsuspend loop in the SR_handler | |
| 4068 // | |
| 4069 // Note that the SR_lock plays no role in this suspend/resume protocol. | |
| 4070 // | |
| 4071 | |
| 4072 static void resume_clear_context(OSThread *osthread) { | |
| 4073 osthread->set_ucontext(NULL); | |
| 4074 osthread->set_siginfo(NULL); | |
| 4075 } | |
| 4076 | |
| 4077 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { | |
| 4078 osthread->set_ucontext(context); | |
| 4079 osthread->set_siginfo(siginfo); | |
| 4080 } | |
| 4081 | |
| 4082 // | |
| 4083 // Handler function invoked when a thread's execution is suspended or | |
| 4084 // resumed. We have to be careful that only async-safe functions are | |
| 4085 // called here (Note: most pthread functions are not async safe and | |
| 4086 // should be avoided.) | |
| 4087 // | |
| 4088 // Note: sigwait() is a more natural fit than sigsuspend() from an | |
| 4089 // interface point of view, but sigwait() prevents the signal hander | |
| 4090 // from being run. libpthread would get very confused by not having | |
| 4091 // its signal handlers run and prevents sigwait()'s use with the | |
| 4092 // mutex granting granting signal. | |
| 4093 // | |
| 10405 | 4094 // Currently only ever called on the VMThread and JavaThreads (PC sampling) |
| 0 | 4095 // |
| 4096 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { | |
| 4097 // Save and restore errno to avoid confusing native code with EINTR | |
| 4098 // after sigsuspend. | |
| 4099 int old_errno = errno; | |
| 4100 | |
| 4101 Thread* thread = Thread::current(); | |
| 4102 OSThread* osthread = thread->osthread(); | |
| 10405 | 4103 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
| 4104 | |
| 4105 os::SuspendResume::State current = osthread->sr.state(); | |
| 4106 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { | |
| 0 | 4107 suspend_save_context(osthread, siginfo, context); |
| 4108 | |
| 10405 | 4109 // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
| 4110 os::SuspendResume::State state = osthread->sr.suspended(); | |
| 4111 if (state == os::SuspendResume::SR_SUSPENDED) { | |
| 4112 sigset_t suspend_set; // signals for sigsuspend() | |
| 4113 | |
| 4114 // get current set of blocked signals and unblock resume signal | |
| 4115 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); | |
| 4116 sigdelset(&suspend_set, SR_signum); | |
| 4117 | |
| 4118 sr_semaphore.signal(); | |
| 4119 // wait here until we are resumed | |
| 4120 while (1) { | |
| 4121 sigsuspend(&suspend_set); | |
| 4122 | |
| 4123 os::SuspendResume::State result = osthread->sr.running(); | |
| 4124 if (result == os::SuspendResume::SR_RUNNING) { | |
| 4125 sr_semaphore.signal(); | |
| 4126 break; | |
| 4127 } | |
| 4128 } | |
| 4129 | |
| 4130 } else if (state == os::SuspendResume::SR_RUNNING) { | |
| 4131 // request was cancelled, continue | |
| 4132 } else { | |
| 4133 ShouldNotReachHere(); | |
| 4134 } | |
| 0 | 4135 |
| 4136 resume_clear_context(osthread); | |
| 10405 | 4137 } else if (current == os::SuspendResume::SR_RUNNING) { |
| 4138 // request was cancelled, continue | |
| 4139 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { | |
| 4140 // ignore | |
| 0 | 4141 } else { |
| 10405 | 4142 // ignore |
| 0 | 4143 } |
| 4144 | |
| 4145 errno = old_errno; | |
| 4146 } | |
| 4147 | |
| 4148 | |
| 4149 static int SR_initialize() { | |
| 4150 struct sigaction act; | |
| 4151 char *s; | |
| 4152 /* Get signal number to use for suspend/resume */ | |
| 4153 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { | |
| 4154 int sig = ::strtol(s, 0, 10); | |
| 4155 if (sig > 0 || sig < _NSIG) { | |
| 4156 SR_signum = sig; | |
| 4157 } | |
| 4158 } | |
| 4159 | |
| 4160 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, | |
| 4161 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); | |
| 4162 | |
| 4163 sigemptyset(&SR_sigset); | |
| 4164 sigaddset(&SR_sigset, SR_signum); | |
| 4165 | |
| 4166 /* Set up signal handler for suspend/resume */ | |
| 4167 act.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 4168 act.sa_handler = (void (*)(int)) SR_handler; | |
| 4169 | |
| 4170 // SR_signum is blocked by default. | |
| 4171 // 4528190 - We also need to block pthread restart signal (32 on all | |
| 4172 // supported Linux platforms). Note that LinuxThreads need to block | |
| 4173 // this signal for all threads to work properly. So we don't have | |
| 4174 // to use hard-coded signal number when setting up the mask. | |
| 4175 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); | |
| 4176 | |
| 4177 if (sigaction(SR_signum, &act, 0) == -1) { | |
| 4178 return -1; | |
| 4179 } | |
| 4180 | |
| 4181 // Save signal flag | |
| 4182 os::Linux::set_our_sigflags(SR_signum, act.sa_flags); | |
| 4183 return 0; | |
| 4184 } | |
| 4185 | |
| 10405 | 4186 static int sr_notify(OSThread* osthread) { |
| 4187 int status = pthread_kill(osthread->pthread_id(), SR_signum); | |
| 4188 assert_status(status == 0, status, "pthread_kill"); | |
| 4189 return status; | |
| 4190 } | |
| 4191 | |
| 4192 // "Randomly" selected value for how long we want to spin | |
| 4193 // before bailing out on suspending a thread, also how often | |
| 4194 // we send a signal to a thread we want to resume | |
| 4195 static const int RANDOMLY_LARGE_INTEGER = 1000000; | |
| 4196 static const int RANDOMLY_LARGE_INTEGER2 = 100; | |
| 0 | 4197 |
| 4198 // returns true on success and false on error - really an error is fatal | |
| 4199 // but this seems the normal response to library errors | |
| 4200 static bool do_suspend(OSThread* osthread) { | |
| 10405 | 4201 assert(osthread->sr.is_running(), "thread should be running"); |
| 4202 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); | |
| 4203 | |
| 0 | 4204 // mark as suspended and send signal |
| 10405 | 4205 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
| 4206 // failed to switch, state wasn't running? | |
| 4207 ShouldNotReachHere(); | |
| 4208 return false; | |
| 4209 } | |
| 4210 | |
| 4211 if (sr_notify(osthread) != 0) { | |
| 4212 ShouldNotReachHere(); | |
| 4213 } | |
| 4214 | |
| 4215 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED | |
| 4216 while (true) { | |
| 4217 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
| 4218 break; | |
| 4219 } else { | |
| 4220 // timeout | |
| 4221 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); | |
| 4222 if (cancelled == os::SuspendResume::SR_RUNNING) { | |
| 4223 return false; | |
| 4224 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { | |
| 4225 // make sure that we consume the signal on the semaphore as well | |
| 4226 sr_semaphore.wait(); | |
| 4227 break; | |
| 4228 } else { | |
| 4229 ShouldNotReachHere(); | |
| 4230 return false; | |
| 4231 } | |
| 0 | 4232 } |
| 10405 | 4233 } |
| 4234 | |
| 4235 guarantee(osthread->sr.is_suspended(), "Must be suspended"); | |
| 4236 return true; | |
| 0 | 4237 } |
| 4238 | |
| 4239 static void do_resume(OSThread* osthread) { | |
| 4240 assert(osthread->sr.is_suspended(), "thread should be suspended"); | |
| 10405 | 4241 assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
| 4242 | |
| 4243 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { | |
| 4244 // failed to switch to WAKEUP_REQUEST | |
| 4245 ShouldNotReachHere(); | |
| 4246 return; | |
| 4247 } | |
| 4248 | |
| 4249 while (true) { | |
| 4250 if (sr_notify(osthread) == 0) { | |
| 4251 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
| 4252 if (osthread->sr.is_running()) { | |
| 4253 return; | |
| 4254 } | |
| 4255 } | |
| 4256 } else { | |
| 4257 ShouldNotReachHere(); | |
| 0 | 4258 } |
| 4259 } | |
| 10405 | 4260 |
| 4261 guarantee(osthread->sr.is_running(), "Must be running!"); | |
| 0 | 4262 } |
| 4263 | |
| 4264 //////////////////////////////////////////////////////////////////////////////// | |
| 4265 // interrupt support | |
| 4266 | |
| 4267 void os::interrupt(Thread* thread) { | |
| 4268 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 4269 "possibility of dangling Thread pointer"); | |
| 4270 | |
| 4271 OSThread* osthread = thread->osthread(); | |
| 4272 | |
| 4273 if (!osthread->interrupted()) { | |
| 4274 osthread->set_interrupted(true); | |
| 4275 // More than one thread can get here with the same value of osthread, | |
| 4276 // resulting in multiple notifications. We do, however, want the store | |
| 4277 // to interrupted() to be visible to other threads before we execute unpark(). | |
| 4278 OrderAccess::fence(); | |
| 4279 ParkEvent * const slp = thread->_SleepEvent ; | |
| 4280 if (slp != NULL) slp->unpark() ; | |
| 4281 } | |
| 4282 | |
| 4283 // For JSR166. Unpark even if interrupt status already was set | |
| 4284 if (thread->is_Java_thread()) | |
| 4285 ((JavaThread*)thread)->parker()->unpark(); | |
| 4286 | |
| 4287 ParkEvent * ev = thread->_ParkEvent ; | |
| 4288 if (ev != NULL) ev->unpark() ; | |
| 4289 | |
| 4290 } | |
| 4291 | |
| 4292 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 4293 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 4294 "possibility of dangling Thread pointer"); | |
| 4295 | |
| 4296 OSThread* osthread = thread->osthread(); | |
| 4297 | |
| 4298 bool interrupted = osthread->interrupted(); | |
| 4299 | |
| 4300 if (interrupted && clear_interrupted) { | |
| 4301 osthread->set_interrupted(false); | |
| 4302 // consider thread->_SleepEvent->reset() ... optional optimization | |
| 4303 } | |
| 4304 | |
| 4305 return interrupted; | |
| 4306 } | |
| 4307 | |
| 4308 /////////////////////////////////////////////////////////////////////////////////// | |
| 4309 // signal handling (except suspend/resume) | |
| 4310 | |
| 4311 // This routine may be used by user applications as a "hook" to catch signals. | |
| 4312 // The user-defined signal handler must pass unrecognized signals to this | |
| 4313 // routine, and if it returns true (non-zero), then the signal handler must | |
| 4314 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 4315 // routine will never retun false (zero), but instead will execute a VM panic | |
| 4316 // routine kill the process. | |
| 4317 // | |
| 4318 // If this routine returns false, it is OK to call it again. This allows | |
| 4319 // the user-defined signal handler to perform checks either before or after | |
| 4320 // the VM performs its own checks. Naturally, the user code would be making | |
| 4321 // a serious error if it tried to handle an exception (such as a null check | |
| 4322 // or breakpoint) that the VM was generating for its own correct operation. | |
| 4323 // | |
| 4324 // This routine may recognize any of the following kinds of signals: | |
| 4325 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. | |
| 4326 // It should be consulted by handlers for any of those signals. | |
| 4327 // | |
| 4328 // The caller of this routine must pass in the three arguments supplied | |
| 4329 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 4330 // field of the structure passed to sigaction(). This routine assumes that | |
| 4331 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 4332 // | |
| 4333 // Note that the VM will print warnings if it detects conflicting signal | |
| 4334 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 4335 // | |
| 2191 | 4336 extern "C" JNIEXPORT int |
| 0 | 4337 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, |
| 4338 void* ucontext, int abort_if_unrecognized); | |
| 4339 | |
| 4340 void signalHandler(int sig, siginfo_t* info, void* uc) { | |
| 4341 assert(info != NULL && uc != NULL, "it must be old kernel"); | |
| 8067 | 4342 int orig_errno = errno; // Preserve errno value over signal handler. |
| 0 | 4343 JVM_handle_linux_signal(sig, info, uc, true); |
| 8067 | 4344 errno = orig_errno; |
| 0 | 4345 } |
| 4346 | |
| 4347 | |
| 4348 // This boolean allows users to forward their own non-matching signals | |
| 4349 // to JVM_handle_linux_signal, harmlessly. | |
| 4350 bool os::Linux::signal_handlers_are_installed = false; | |
| 4351 | |
| 4352 // For signal-chaining | |
| 4353 struct sigaction os::Linux::sigact[MAXSIGNUM]; | |
| 4354 unsigned int os::Linux::sigs = 0; | |
| 4355 bool os::Linux::libjsig_is_loaded = false; | |
| 4356 typedef struct sigaction *(*get_signal_t)(int); | |
| 4357 get_signal_t os::Linux::get_signal_action = NULL; | |
| 4358 | |
| 4359 struct sigaction* os::Linux::get_chained_signal_action(int sig) { | |
| 4360 struct sigaction *actp = NULL; | |
| 4361 | |
| 4362 if (libjsig_is_loaded) { | |
| 4363 // Retrieve the old signal handler from libjsig | |
| 4364 actp = (*get_signal_action)(sig); | |
| 4365 } | |
| 4366 if (actp == NULL) { | |
| 4367 // Retrieve the preinstalled signal handler from jvm | |
| 4368 actp = get_preinstalled_handler(sig); | |
| 4369 } | |
| 4370 | |
| 4371 return actp; | |
| 4372 } | |
| 4373 | |
| 4374 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 4375 siginfo_t *siginfo, void *context) { | |
| 4376 // Call the old signal handler | |
| 4377 if (actp->sa_handler == SIG_DFL) { | |
| 4378 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 4379 // instead of taking the default action. | |
| 4380 return false; | |
| 4381 } else if (actp->sa_handler != SIG_IGN) { | |
| 4382 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 4383 // automaticlly block the signal | |
| 4384 sigaddset(&(actp->sa_mask), sig); | |
| 4385 } | |
| 4386 | |
|
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4387 sa_handler_t hand = NULL; |
|
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|
4388 sa_sigaction_t sa = NULL; |
| 0 | 4389 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; |
| 4390 // retrieve the chained handler | |
| 4391 if (siginfo_flag_set) { | |
| 4392 sa = actp->sa_sigaction; | |
| 4393 } else { | |
| 4394 hand = actp->sa_handler; | |
| 4395 } | |
| 4396 | |
| 4397 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 4398 actp->sa_handler = SIG_DFL; | |
| 4399 } | |
| 4400 | |
| 4401 // try to honor the signal mask | |
| 4402 sigset_t oset; | |
| 4403 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 4404 | |
| 4405 // call into the chained handler | |
| 4406 if (siginfo_flag_set) { | |
| 4407 (*sa)(sig, siginfo, context); | |
| 4408 } else { | |
| 4409 (*hand)(sig); | |
| 4410 } | |
| 4411 | |
| 4412 // restore the signal mask | |
| 4413 pthread_sigmask(SIG_SETMASK, &oset, 0); | |
| 4414 } | |
| 4415 // Tell jvm's signal handler the signal is taken care of. | |
| 4416 return true; | |
| 4417 } | |
| 4418 | |
| 4419 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 4420 bool chained = false; | |
| 4421 // signal-chaining | |
| 4422 if (UseSignalChaining) { | |
| 4423 struct sigaction *actp = get_chained_signal_action(sig); | |
| 4424 if (actp != NULL) { | |
| 4425 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 4426 } | |
| 4427 } | |
| 4428 return chained; | |
| 4429 } | |
| 4430 | |
| 4431 struct sigaction* os::Linux::get_preinstalled_handler(int sig) { | |
| 4432 if ((( (unsigned int)1 << sig ) & sigs) != 0) { | |
| 4433 return &sigact[sig]; | |
| 4434 } | |
| 4435 return NULL; | |
| 4436 } | |
| 4437 | |
| 4438 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 4439 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4440 sigact[sig] = oldAct; | |
| 4441 sigs |= (unsigned int)1 << sig; | |
| 4442 } | |
| 4443 | |
| 4444 // for diagnostic | |
| 4445 int os::Linux::sigflags[MAXSIGNUM]; | |
| 4446 | |
| 4447 int os::Linux::get_our_sigflags(int sig) { | |
| 4448 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4449 return sigflags[sig]; | |
| 4450 } | |
| 4451 | |
| 4452 void os::Linux::set_our_sigflags(int sig, int flags) { | |
| 4453 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4454 sigflags[sig] = flags; | |
| 4455 } | |
| 4456 | |
| 4457 void os::Linux::set_signal_handler(int sig, bool set_installed) { | |
| 4458 // Check for overwrite. | |
| 4459 struct sigaction oldAct; | |
| 4460 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 4461 | |
| 4462 void* oldhand = oldAct.sa_sigaction | |
| 4463 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4464 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4465 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 4466 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 4467 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { | |
| 4468 if (AllowUserSignalHandlers || !set_installed) { | |
| 4469 // Do not overwrite; user takes responsibility to forward to us. | |
| 4470 return; | |
| 4471 } else if (UseSignalChaining) { | |
| 4472 // save the old handler in jvm | |
| 4473 save_preinstalled_handler(sig, oldAct); | |
| 4474 // libjsig also interposes the sigaction() call below and saves the | |
| 4475 // old sigaction on it own. | |
| 4476 } else { | |
|
1490
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parents:
1353
diff
changeset
|
4477 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
|
f03d0a26bf83
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1353
diff
changeset
|
4478 "%#lx for signal %d.", (long)oldhand, sig)); |
| 0 | 4479 } |
| 4480 } | |
| 4481 | |
| 4482 struct sigaction sigAct; | |
| 4483 sigfillset(&(sigAct.sa_mask)); | |
| 4484 sigAct.sa_handler = SIG_DFL; | |
| 4485 if (!set_installed) { | |
| 4486 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 4487 } else { | |
| 4488 sigAct.sa_sigaction = signalHandler; | |
| 4489 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 4490 } | |
| 4491 // Save flags, which are set by ours | |
| 4492 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4493 sigflags[sig] = sigAct.sa_flags; | |
| 4494 | |
| 4495 int ret = sigaction(sig, &sigAct, &oldAct); | |
| 4496 assert(ret == 0, "check"); | |
| 4497 | |
| 4498 void* oldhand2 = oldAct.sa_sigaction | |
| 4499 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4500 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4501 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 4502 } | |
| 4503 | |
| 4504 // install signal handlers for signals that HotSpot needs to | |
| 4505 // handle in order to support Java-level exception handling. | |
| 4506 | |
| 4507 void os::Linux::install_signal_handlers() { | |
| 4508 if (!signal_handlers_are_installed) { | |
| 4509 signal_handlers_are_installed = true; | |
| 4510 | |
| 4511 // signal-chaining | |
| 4512 typedef void (*signal_setting_t)(); | |
| 4513 signal_setting_t begin_signal_setting = NULL; | |
| 4514 signal_setting_t end_signal_setting = NULL; | |
| 4515 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4516 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 4517 if (begin_signal_setting != NULL) { | |
| 4518 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4519 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 4520 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 4521 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 4522 libjsig_is_loaded = true; | |
| 4523 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 4524 } | |
| 4525 if (libjsig_is_loaded) { | |
| 4526 // Tell libjsig jvm is setting signal handlers | |
| 4527 (*begin_signal_setting)(); | |
| 4528 } | |
| 4529 | |
| 4530 set_signal_handler(SIGSEGV, true); | |
| 4531 set_signal_handler(SIGPIPE, true); | |
| 4532 set_signal_handler(SIGBUS, true); | |
| 4533 set_signal_handler(SIGILL, true); | |
| 4534 set_signal_handler(SIGFPE, true); | |
|
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935bf3340572
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14422
diff
changeset
|
4535 #if defined(PPC64) |
|
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
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14422
diff
changeset
|
4536 set_signal_handler(SIGTRAP, true); |
|
935bf3340572
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parents:
14422
diff
changeset
|
4537 #endif |
| 0 | 4538 set_signal_handler(SIGXFSZ, true); |
| 4539 | |
| 4540 if (libjsig_is_loaded) { | |
| 4541 // Tell libjsig jvm finishes setting signal handlers | |
| 4542 (*end_signal_setting)(); | |
| 4543 } | |
| 4544 | |
| 4545 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
|
3956
3607aac85aa9
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kevinw
parents:
3913
diff
changeset
|
4546 // and if UserSignalHandler is installed all bets are off. |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4547 // Log that signal checking is off only if -verbose:jni is specified. |
| 0 | 4548 if (CheckJNICalls) { |
| 4549 if (libjsig_is_loaded) { | |
|
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4550 if (PrintJNIResolving) { |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4551 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4552 } |
| 0 | 4553 check_signals = false; |
| 4554 } | |
| 4555 if (AllowUserSignalHandlers) { | |
|
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4556 if (PrintJNIResolving) { |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4557 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4558 } |
| 0 | 4559 check_signals = false; |
| 4560 } | |
| 4561 } | |
| 4562 } | |
| 4563 } | |
| 4564 | |
| 4565 // This is the fastest way to get thread cpu time on Linux. | |
| 4566 // Returns cpu time (user+sys) for any thread, not only for current. | |
| 4567 // POSIX compliant clocks are implemented in the kernels 2.6.16+. | |
| 4568 // It might work on 2.6.10+ with a special kernel/glibc patch. | |
| 4569 // For reference, please, see IEEE Std 1003.1-2004: | |
| 4570 // http://www.unix.org/single_unix_specification | |
| 4571 | |
| 4572 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { | |
| 4573 struct timespec tp; | |
| 4574 int rc = os::Linux::clock_gettime(clockid, &tp); | |
| 4575 assert(rc == 0, "clock_gettime is expected to return 0 code"); | |
| 4576 | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
4577 return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; |
| 0 | 4578 } |
| 4579 | |
| 4580 ///// | |
| 4581 // glibc on Linux platform uses non-documented flag | |
| 4582 // to indicate, that some special sort of signal | |
| 4583 // trampoline is used. | |
| 4584 // We will never set this flag, and we should | |
| 4585 // ignore this flag in our diagnostic | |
| 4586 #ifdef SIGNIFICANT_SIGNAL_MASK | |
| 4587 #undef SIGNIFICANT_SIGNAL_MASK | |
| 4588 #endif | |
| 4589 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) | |
| 4590 | |
| 4591 static const char* get_signal_handler_name(address handler, | |
| 4592 char* buf, int buflen) { | |
|
23822
626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
csahu
parents:
23418
diff
changeset
|
4593 int offset = 0; |
| 0 | 4594 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); |
| 4595 if (found) { | |
| 4596 // skip directory names | |
| 4597 const char *p1, *p2; | |
| 4598 p1 = buf; | |
| 4599 size_t len = strlen(os::file_separator()); | |
| 4600 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 4601 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 4602 } else { | |
| 4603 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 4604 } | |
| 4605 return buf; | |
| 4606 } | |
| 4607 | |
| 4608 static void print_signal_handler(outputStream* st, int sig, | |
| 4609 char* buf, size_t buflen) { | |
| 4610 struct sigaction sa; | |
| 4611 | |
| 4612 sigaction(sig, NULL, &sa); | |
| 4613 | |
| 4614 // See comment for SIGNIFICANT_SIGNAL_MASK define | |
| 4615 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4616 | |
| 4617 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 4618 | |
| 4619 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 4620 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 4621 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 4622 | |
| 4623 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 4624 st->print("SIG_DFL"); | |
| 4625 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 4626 st->print("SIG_IGN"); | |
| 4627 } else { | |
| 4628 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 4629 } | |
| 4630 | |
| 14410 | 4631 st->print(", sa_mask[0]="); |
| 4632 os::Posix::print_signal_set_short(st, &sa.sa_mask); | |
| 0 | 4633 |
| 4634 address rh = VMError::get_resetted_sighandler(sig); | |
| 4635 // May be, handler was resetted by VMError? | |
| 4636 if(rh != NULL) { | |
| 4637 handler = rh; | |
| 4638 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; | |
| 4639 } | |
| 4640 | |
| 14410 | 4641 st->print(", sa_flags="); |
| 4642 os::Posix::print_sa_flags(st, sa.sa_flags); | |
| 0 | 4643 |
| 4644 // Check: is it our handler? | |
| 4645 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || | |
| 4646 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { | |
| 4647 // It is our signal handler | |
| 4648 // check for flags, reset system-used one! | |
| 4649 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4650 st->print( | |
| 4651 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 4652 os::Linux::get_our_sigflags(sig)); | |
| 4653 } | |
| 4654 } | |
| 4655 st->cr(); | |
| 4656 } | |
| 4657 | |
| 4658 | |
| 4659 #define DO_SIGNAL_CHECK(sig) \ | |
| 4660 if (!sigismember(&check_signal_done, sig)) \ | |
| 4661 os::Linux::check_signal_handler(sig) | |
| 4662 | |
| 4663 // This method is a periodic task to check for misbehaving JNI applications | |
| 4664 // under CheckJNI, we can add any periodic checks here | |
| 4665 | |
| 4666 void os::run_periodic_checks() { | |
| 4667 | |
| 4668 if (check_signals == false) return; | |
| 4669 | |
| 4670 // SEGV and BUS if overridden could potentially prevent | |
| 4671 // generation of hs*.log in the event of a crash, debugging | |
| 4672 // such a case can be very challenging, so we absolutely | |
| 4673 // check the following for a good measure: | |
| 4674 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4675 DO_SIGNAL_CHECK(SIGILL); | |
| 4676 DO_SIGNAL_CHECK(SIGFPE); | |
| 4677 DO_SIGNAL_CHECK(SIGBUS); | |
| 4678 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4679 DO_SIGNAL_CHECK(SIGXFSZ); | |
|
14432
935bf3340572
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goetz
parents:
14422
diff
changeset
|
4680 #if defined(PPC64) |
|
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4681 DO_SIGNAL_CHECK(SIGTRAP); |
|
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4682 #endif |
| 0 | 4683 |
| 4684 // ReduceSignalUsage allows the user to override these handlers | |
| 4685 // see comments at the very top and jvm_solaris.h | |
| 4686 if (!ReduceSignalUsage) { | |
| 4687 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4688 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4689 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4690 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4691 } | |
| 4692 | |
| 4693 DO_SIGNAL_CHECK(SR_signum); | |
| 4694 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); | |
| 4695 } | |
| 4696 | |
| 4697 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4698 | |
| 4699 static os_sigaction_t os_sigaction = NULL; | |
| 4700 | |
| 4701 void os::Linux::check_signal_handler(int sig) { | |
| 4702 char buf[O_BUFLEN]; | |
| 4703 address jvmHandler = NULL; | |
| 4704 | |
| 4705 | |
| 4706 struct sigaction act; | |
| 4707 if (os_sigaction == NULL) { | |
| 4708 // only trust the default sigaction, in case it has been interposed | |
| 4709 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4710 if (os_sigaction == NULL) return; | |
| 4711 } | |
| 4712 | |
| 4713 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4714 | |
| 4715 | |
| 4716 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4717 | |
| 4718 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4719 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4720 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4721 | |
| 4722 | |
| 4723 switch(sig) { | |
| 4724 case SIGSEGV: | |
| 4725 case SIGBUS: | |
| 4726 case SIGFPE: | |
| 4727 case SIGPIPE: | |
| 4728 case SIGILL: | |
| 4729 case SIGXFSZ: | |
| 4730 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); | |
| 4731 break; | |
| 4732 | |
| 4733 case SHUTDOWN1_SIGNAL: | |
| 4734 case SHUTDOWN2_SIGNAL: | |
| 4735 case SHUTDOWN3_SIGNAL: | |
| 4736 case BREAK_SIGNAL: | |
| 4737 jvmHandler = (address)user_handler(); | |
| 4738 break; | |
| 4739 | |
| 4740 case INTERRUPT_SIGNAL: | |
| 4741 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); | |
| 4742 break; | |
| 4743 | |
| 4744 default: | |
| 4745 if (sig == SR_signum) { | |
| 4746 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); | |
| 4747 } else { | |
| 4748 return; | |
| 4749 } | |
| 4750 break; | |
| 4751 } | |
| 4752 | |
| 4753 if (thisHandler != jvmHandler) { | |
| 4754 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4755 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4756 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4757 // No need to check this sig any longer | |
| 4758 sigaddset(&check_signal_done, sig); | |
|
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6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
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parents:
23004
diff
changeset
|
4759 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN |
|
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4760 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { |
|
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4761 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", |
|
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4762 exception_name(sig, buf, O_BUFLEN)); |
|
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4763 } |
| 0 | 4764 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { |
| 4765 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4766 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); | |
| 4767 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4768 // No need to check this sig any longer | |
| 4769 sigaddset(&check_signal_done, sig); | |
| 4770 } | |
| 4771 | |
| 4772 // Dump all the signal | |
| 4773 if (sigismember(&check_signal_done, sig)) { | |
| 4774 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4775 } | |
| 4776 } | |
| 4777 | |
| 4778 extern void report_error(char* file_name, int line_no, char* title, char* format, ...); | |
| 4779 | |
| 4780 extern bool signal_name(int signo, char* buf, size_t len); | |
| 4781 | |
| 4782 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4783 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4784 // signal | |
| 4785 if (!signal_name(exception_code, buf, size)) { | |
| 4786 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4787 } | |
| 4788 return buf; | |
| 4789 } else { | |
| 4790 return NULL; | |
| 4791 } | |
| 4792 } | |
| 4793 | |
| 4794 // this is called _before_ the most of global arguments have been parsed | |
| 4795 void os::init(void) { | |
| 4796 char dummy; /* used to get a guess on initial stack address */ | |
| 4797 // first_hrtime = gethrtime(); | |
| 4798 | |
| 4799 // With LinuxThreads the JavaMain thread pid (primordial thread) | |
| 4800 // is different than the pid of the java launcher thread. | |
| 4801 // So, on Linux, the launcher thread pid is passed to the VM | |
| 4802 // via the sun.java.launcher.pid property. | |
| 4803 // Use this property instead of getpid() if it was correctly passed. | |
| 4804 // See bug 6351349. | |
| 4805 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); | |
| 4806 | |
| 4807 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); | |
| 4808 | |
| 4809 clock_tics_per_sec = sysconf(_SC_CLK_TCK); | |
| 4810 | |
| 4811 init_random(1234567); | |
| 4812 | |
| 4813 ThreadCritical::initialize(); | |
| 4814 | |
| 4815 Linux::set_page_size(sysconf(_SC_PAGESIZE)); | |
| 4816 if (Linux::page_size() == -1) { | |
|
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4817 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", |
|
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4818 strerror(errno))); |
| 0 | 4819 } |
| 4820 init_page_sizes((size_t) Linux::page_size()); | |
| 4821 | |
| 4822 Linux::initialize_system_info(); | |
| 4823 | |
| 4824 // main_thread points to the aboriginal thread | |
| 4825 Linux::_main_thread = pthread_self(); | |
| 4826 | |
| 4827 Linux::clock_init(); | |
|
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
4828 initial_time_count = javaTimeNanos(); |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4829 |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4830 // pthread_condattr initialization for monotonic clock |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4831 int status; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4832 pthread_condattr_t* _condattr = os::Linux::condAttr(); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4833 if ((status = pthread_condattr_init(_condattr)) != 0) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4834 fatal(err_msg("pthread_condattr_init: %s", strerror(status))); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4835 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4836 // Only set the clock if CLOCK_MONOTONIC is available |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4837 if (Linux::supports_monotonic_clock()) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4838 if ((status = pthread_condattr_setclock(_condattr, CLOCK_MONOTONIC)) != 0) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4839 if (status == EINVAL) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4840 warning("Unable to use monotonic clock with relative timed-waits" \ |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4841 " - changes to the time-of-day clock may have adverse affects"); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4842 } else { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4843 fatal(err_msg("pthread_condattr_setclock: %s", strerror(status))); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4844 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4845 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4846 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4847 // else it defaults to CLOCK_REALTIME |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4848 |
| 242 | 4849 pthread_mutex_init(&dl_mutex, NULL); |
|
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4850 |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4851 // If the pagesize of the VM is greater than 8K determine the appropriate |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4852 // number of initial guard pages. The user can change this with the |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4853 // command line arguments, if needed. |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4854 if (vm_page_size() > (int)Linux::vm_default_page_size()) { |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4855 StackYellowPages = 1; |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4856 StackRedPages = 1; |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4857 StackShadowPages = round_to((StackShadowPages*Linux::vm_default_page_size()), vm_page_size()) / vm_page_size(); |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4858 } |
| 0 | 4859 } |
| 4860 | |
| 4861 // To install functions for atexit system call | |
| 4862 extern "C" { | |
| 4863 static void perfMemory_exit_helper() { | |
| 4864 perfMemory_exit(); | |
| 4865 } | |
| 4866 } | |
| 4867 | |
| 4868 // this is called _after_ the global arguments have been parsed | |
| 4869 jint os::init_2(void) | |
| 4870 { | |
| 4871 Linux::fast_thread_clock_init(); | |
| 4872 | |
| 4873 // Allocate a single page and mark it as readable for safepoint polling | |
| 4874 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
| 4875 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); | |
| 4876 | |
| 4877 os::set_polling_page( polling_page ); | |
| 4878 | |
| 4879 #ifndef PRODUCT | |
| 4880 if(Verbose && PrintMiscellaneous) | |
| 4881 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4882 #endif | |
| 4883 | |
| 4884 if (!UseMembar) { | |
| 4885 address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
4886 guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
| 0 | 4887 os::set_memory_serialize_page( mem_serialize_page ); |
| 4888 | |
| 4889 #ifndef PRODUCT | |
| 4890 if(Verbose && PrintMiscellaneous) | |
| 4891 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4892 #endif | |
| 4893 } | |
| 4894 | |
| 4895 // initialize suspend/resume support - must do this before signal_sets_init() | |
| 4896 if (SR_initialize() != 0) { | |
| 4897 perror("SR_initialize failed"); | |
| 4898 return JNI_ERR; | |
| 4899 } | |
| 4900 | |
| 4901 Linux::signal_sets_init(); | |
| 4902 Linux::install_signal_handlers(); | |
| 4903 | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4904 // Check minimum allowable stack size for thread creation and to initialize |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4905 // the java system classes, including StackOverflowError - depends on page |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4906 // size. Add a page for compiler2 recursion in main thread. |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4907 // Add in 2*BytesPerWord times page size to account for VM stack during |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4908 // class initialization depending on 32 or 64 bit VM. |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4909 os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed, |
|
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4910 (size_t)(StackYellowPages+StackRedPages+StackShadowPages) * Linux::page_size() + |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4911 (2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::vm_default_page_size()); |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4912 |
| 0 | 4913 size_t threadStackSizeInBytes = ThreadStackSize * K; |
| 4914 if (threadStackSizeInBytes != 0 && | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4915 threadStackSizeInBytes < os::Linux::min_stack_allowed) { |
| 0 | 4916 tty->print_cr("\nThe stack size specified is too small, " |
| 4917 "Specify at least %dk", | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4918 os::Linux::min_stack_allowed/ K); |
| 0 | 4919 return JNI_ERR; |
| 4920 } | |
| 4921 | |
| 4922 // Make the stack size a multiple of the page size so that | |
| 4923 // the yellow/red zones can be guarded. | |
| 4924 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4925 vm_page_size())); | |
| 4926 | |
| 4927 Linux::capture_initial_stack(JavaThread::stack_size_at_create()); | |
| 4928 | |
|
12313
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4929 #if defined(IA32) |
|
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4930 workaround_expand_exec_shield_cs_limit(); |
|
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4931 #endif |
|
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4932 |
| 0 | 4933 Linux::libpthread_init(); |
| 4934 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 4935 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", | |
| 4936 Linux::glibc_version(), Linux::libpthread_version(), | |
| 4937 Linux::is_floating_stack() ? "floating stack" : "fixed stack"); | |
| 4938 } | |
| 4939 | |
| 141 | 4940 if (UseNUMA) { |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4941 if (!Linux::libnuma_init()) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4942 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4943 } else { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4944 if ((Linux::numa_max_node() < 1)) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4945 // There's only one node(they start from 0), disable NUMA. |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4946 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4947 } |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4948 } |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4949 // With SHM and HugeTLBFS large pages we cannot uncommit a page, so there's no way |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4950 // we can make the adaptive lgrp chunk resizing work. If the user specified |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4951 // both UseNUMA and UseLargePages (or UseSHM/UseHugeTLBFS) on the command line - warn and |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4952 // disable adaptive resizing. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4953 if (UseNUMA && UseLargePages && !can_commit_large_page_memory()) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4954 if (FLAG_IS_DEFAULT(UseNUMA)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4955 UseNUMA = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4956 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4957 if (FLAG_IS_DEFAULT(UseLargePages) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4958 FLAG_IS_DEFAULT(UseSHM) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4959 FLAG_IS_DEFAULT(UseHugeTLBFS)) { |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4960 UseLargePages = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4961 } else { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4962 warning("UseNUMA is not fully compatible with SHM/HugeTLBFS large pages, disabling adaptive resizing"); |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4963 UseAdaptiveSizePolicy = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4964 UseAdaptiveNUMAChunkSizing = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4965 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4966 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4967 } |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4968 if (!UseNUMA && ForceNUMA) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4969 UseNUMA = true; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4970 } |
| 141 | 4971 } |
| 4972 | |
| 0 | 4973 if (MaxFDLimit) { |
| 4974 // set the number of file descriptors to max. print out error | |
| 4975 // if getrlimit/setrlimit fails but continue regardless. | |
| 4976 struct rlimit nbr_files; | |
| 4977 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4978 if (status != 0) { | |
| 4979 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4980 perror("os::init_2 getrlimit failed"); | |
| 4981 } else { | |
| 4982 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4983 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4984 if (status != 0) { | |
| 4985 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4986 perror("os::init_2 setrlimit failed"); | |
| 4987 } | |
| 4988 } | |
| 4989 } | |
| 4990 | |
| 4991 // Initialize lock used to serialize thread creation (see os::create_thread) | |
| 4992 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); | |
| 4993 | |
| 4994 // at-exit methods are called in the reverse order of their registration. | |
| 4995 // atexit functions are called on return from main or as a result of a | |
| 4996 // call to exit(3C). There can be only 32 of these functions registered | |
| 4997 // and atexit() does not set errno. | |
| 4998 | |
| 4999 if (PerfAllowAtExitRegistration) { | |
| 5000 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 5001 // atexit functions can be delayed until process exit time, which | |
| 5002 // can be problematic for embedded VM situations. Embedded VMs should | |
| 5003 // call DestroyJavaVM() to assure that VM resources are released. | |
| 5004 | |
| 5005 // note: perfMemory_exit_helper atexit function may be removed in | |
| 5006 // the future if the appropriate cleanup code can be added to the | |
| 5007 // VM_Exit VMOperation's doit method. | |
| 5008 if (atexit(perfMemory_exit_helper) != 0) { | |
| 14391 | 5009 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
| 0 | 5010 } |
| 5011 } | |
| 5012 | |
| 5013 // initialize thread priority policy | |
| 5014 prio_init(); | |
| 5015 | |
| 5016 return JNI_OK; | |
| 5017 } | |
| 5018 | |
| 5019 // Mark the polling page as unreadable | |
| 5020 void os::make_polling_page_unreadable(void) { | |
| 5021 if( !guard_memory((char*)_polling_page, Linux::page_size()) ) | |
| 5022 fatal("Could not disable polling page"); | |
| 5023 }; | |
| 5024 | |
| 5025 // Mark the polling page as readable | |
| 5026 void os::make_polling_page_readable(void) { | |
|
237
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235
diff
changeset
|
5027 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { |
| 0 | 5028 fatal("Could not enable polling page"); |
|
237
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diff
changeset
|
5029 } |
| 0 | 5030 }; |
| 5031 | |
|
24176
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5032 static int os_cpu_count(const cpu_set_t* cpus) { |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5033 int count = 0; |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5034 // only look up to the number of configured processors |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5035 for (int i = 0; i < os::processor_count(); i++) { |
|
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diff
changeset
|
5036 if (CPU_ISSET(i, cpus)) { |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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parents:
24007
diff
changeset
|
5037 count++; |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
24007
diff
changeset
|
5038 } |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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parents:
24007
diff
changeset
|
5039 } |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
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diff
changeset
|
5040 return count; |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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parents:
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diff
changeset
|
5041 } |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5042 |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5043 // Get the current number of available processors for this process. |
|
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|
5044 // This value can change at any time during a process's lifetime. |
|
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|
5045 // sched_getaffinity gives an accurate answer as it accounts for cpusets. |
|
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|
5046 // If anything goes wrong we fallback to returning the number of online |
|
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|
5047 // processors - which can be greater than the number available to the process. |
| 0 | 5048 int os::active_processor_count() { |
|
24176
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diff
changeset
|
5049 cpu_set_t cpus; // can represent at most 1024 (CPU_SETSIZE) processors |
|
e21dd2c95cf0
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diff
changeset
|
5050 int cpus_size = sizeof(cpu_set_t); |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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changeset
|
5051 int cpu_count = 0; |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5052 |
|
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changeset
|
5053 // pid 0 means the current thread - which we have to assume represents the process |
|
e21dd2c95cf0
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|
5054 if (sched_getaffinity(0, cpus_size, &cpus) == 0) { |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5055 cpu_count = os_cpu_count(&cpus); |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5056 if (PrintActiveCpus) { |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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changeset
|
5057 tty->print_cr("active_processor_count: sched_getaffinity processor count: %d", cpu_count); |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5058 } |
|
e21dd2c95cf0
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diff
changeset
|
5059 } |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
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diff
changeset
|
5060 else { |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5061 cpu_count = ::sysconf(_SC_NPROCESSORS_ONLN); |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
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diff
changeset
|
5062 warning("sched_getaffinity failed (%s)- using online processor count (%d) " |
|
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6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
24007
diff
changeset
|
5063 "which may exceed available processors", strerror(errno), cpu_count); |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
24007
diff
changeset
|
5064 } |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
24007
diff
changeset
|
5065 |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
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diff
changeset
|
5066 assert(cpu_count > 0 && cpu_count <= processor_count(), "sanity check"); |
|
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
shshahma
parents:
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diff
changeset
|
5067 return cpu_count; |
| 0 | 5068 } |
| 5069 | |
| 4006 | 5070 void os::set_native_thread_name(const char *name) { |
| 5071 // Not yet implemented. | |
| 5072 return; | |
| 5073 } | |
| 5074 | |
| 0 | 5075 bool os::distribute_processes(uint length, uint* distribution) { |
| 5076 // Not yet implemented. | |
| 5077 return false; | |
| 5078 } | |
| 5079 | |
| 5080 bool os::bind_to_processor(uint processor_id) { | |
| 5081 // Not yet implemented. | |
| 5082 return false; | |
| 5083 } | |
| 5084 | |
| 5085 /// | |
| 5086 | |
| 10405 | 5087 void os::SuspendedThreadTask::internal_do_task() { |
| 5088 if (do_suspend(_thread->osthread())) { | |
| 5089 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); | |
| 5090 do_task(context); | |
| 5091 do_resume(_thread->osthread()); | |
| 5092 } | |
| 5093 } | |
| 5094 | |
| 5095 class PcFetcher : public os::SuspendedThreadTask { | |
| 5096 public: | |
| 5097 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} | |
| 5098 ExtendedPC result(); | |
| 5099 protected: | |
| 5100 void do_task(const os::SuspendedThreadTaskContext& context); | |
| 5101 private: | |
| 5102 ExtendedPC _epc; | |
| 5103 }; | |
| 5104 | |
| 5105 ExtendedPC PcFetcher::result() { | |
| 5106 guarantee(is_done(), "task is not done yet."); | |
| 5107 return _epc; | |
| 5108 } | |
| 5109 | |
| 5110 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { | |
| 5111 Thread* thread = context.thread(); | |
| 5112 OSThread* osthread = thread->osthread(); | |
| 5113 if (osthread->ucontext() != NULL) { | |
| 5114 _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext()); | |
| 5115 } else { | |
| 5116 // NULL context is unexpected, double-check this is the VMThread | |
| 5117 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); | |
| 5118 } | |
| 5119 } | |
| 5120 | |
| 0 | 5121 // Suspends the target using the signal mechanism and then grabs the PC before |
| 5122 // resuming the target. Used by the flat-profiler only | |
| 5123 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 5124 // Make sure that it is called by the watcher for the VMThread | |
| 5125 assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); | |
| 5126 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 5127 | |
| 10405 | 5128 PcFetcher fetcher(thread); |
| 5129 fetcher.run(); | |
| 5130 return fetcher.result(); | |
| 0 | 5131 } |
| 5132 | |
| 5133 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) | |
| 5134 { | |
| 5135 if (is_NPTL()) { | |
| 5136 return pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 5137 } else { | |
| 5138 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control | |
| 5139 // word back to default 64bit precision if condvar is signaled. Java | |
| 5140 // wants 53bit precision. Save and restore current value. | |
| 5141 int fpu = get_fpu_control_word(); | |
| 5142 int status = pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 5143 set_fpu_control_word(fpu); | |
| 5144 return status; | |
| 5145 } | |
| 5146 } | |
| 5147 | |
| 5148 //////////////////////////////////////////////////////////////////////////////// | |
| 5149 // debug support | |
| 5150 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5151 bool os::find(address addr, outputStream* st) { |
| 0 | 5152 Dl_info dlinfo; |
| 5153 memset(&dlinfo, 0, sizeof(dlinfo)); | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5154 if (dladdr(addr, &dlinfo) != 0) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5155 st->print(PTR_FORMAT ": ", addr); |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5156 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5157 st->print("%s+%#x", dlinfo.dli_sname, |
| 0 | 5158 addr - (intptr_t)dlinfo.dli_saddr); |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5159 } else if (dlinfo.dli_fbase != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5160 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
| 0 | 5161 } else { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5162 st->print("<absolute address>"); |
| 0 | 5163 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5164 if (dlinfo.dli_fname != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5165 st->print(" in %s", dlinfo.dli_fname); |
| 0 | 5166 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5167 if (dlinfo.dli_fbase != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5168 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
| 0 | 5169 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5170 st->cr(); |
| 0 | 5171 |
| 5172 if (Verbose) { | |
| 5173 // decode some bytes around the PC | |
|
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5174 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); |
|
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5175 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
| 0 | 5176 address lowest = (address) dlinfo.dli_sname; |
| 5177 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 5178 if (begin < lowest) begin = lowest; | |
| 5179 Dl_info dlinfo2; | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5180 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
| 0 | 5181 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
| 5182 end = (address) dlinfo2.dli_saddr; | |
|
1681
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bobv
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1642
diff
changeset
|
5183 Disassembler::decode(begin, end, st); |
| 0 | 5184 } |
| 5185 return true; | |
| 5186 } | |
| 5187 return false; | |
| 5188 } | |
| 5189 | |
| 5190 //////////////////////////////////////////////////////////////////////////////// | |
| 5191 // misc | |
| 5192 | |
| 5193 // This does not do anything on Linux. This is basically a hook for being | |
| 5194 // able to use structured exception handling (thread-local exception filters) | |
| 5195 // on, e.g., Win32. | |
| 5196 void | |
| 5197 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, | |
| 5198 JavaCallArguments* args, Thread* thread) { | |
| 5199 f(value, method, args, thread); | |
| 5200 } | |
| 5201 | |
| 5202 void os::print_statistics() { | |
| 5203 } | |
| 5204 | |
| 5205 int os::message_box(const char* title, const char* message) { | |
| 5206 int i; | |
| 5207 fdStream err(defaultStream::error_fd()); | |
| 5208 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 5209 err.cr(); | |
| 5210 err.print_raw_cr(title); | |
| 5211 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 5212 err.cr(); | |
| 5213 err.print_raw_cr(message); | |
| 5214 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 5215 err.cr(); | |
| 5216 | |
| 5217 char buf[16]; | |
| 5218 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 5219 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 5220 | |
| 5221 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 5222 } | |
| 5223 | |
| 5224 int os::stat(const char *path, struct stat *sbuf) { | |
| 5225 char pathbuf[MAX_PATH]; | |
| 5226 if (strlen(path) > MAX_PATH - 1) { | |
| 5227 errno = ENAMETOOLONG; | |
| 5228 return -1; | |
| 5229 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5230 os::native_path(strcpy(pathbuf, path)); |
| 0 | 5231 return ::stat(pathbuf, sbuf); |
| 5232 } | |
| 5233 | |
| 5234 bool os::check_heap(bool force) { | |
| 5235 return true; | |
| 5236 } | |
| 5237 | |
| 5238 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { | |
| 5239 return ::vsnprintf(buf, count, format, args); | |
| 5240 } | |
| 5241 | |
| 5242 // Is a (classpath) directory empty? | |
| 5243 bool os::dir_is_empty(const char* path) { | |
| 5244 DIR *dir = NULL; | |
| 5245 struct dirent *ptr; | |
| 5246 | |
| 5247 dir = opendir(path); | |
| 5248 if (dir == NULL) return true; | |
| 5249 | |
| 5250 /* Scan the directory */ | |
| 5251 bool result = true; | |
| 5252 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 5253 while (result && (ptr = ::readdir(dir)) != NULL) { | |
| 5254 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 5255 result = false; | |
| 5256 } | |
| 5257 } | |
| 5258 closedir(dir); | |
| 5259 return result; | |
| 5260 } | |
| 5261 | |
|
1980
828eafbd85cc
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ikrylov
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1972
diff
changeset
|
5262 // This code originates from JDK's sysOpen and open64_w |
|
828eafbd85cc
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1972
diff
changeset
|
5263 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5264 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5265 #ifndef O_DELETE |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5266 #define O_DELETE 0x10000 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5267 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5268 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5269 // Open a file. Unlink the file immediately after open returns |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5270 // if the specified oflag has the O_DELETE flag set. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5271 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5272 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5273 int os::open(const char *path, int oflag, int mode) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5274 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5275 if (strlen(path) > MAX_PATH - 1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5276 errno = ENAMETOOLONG; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5277 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5278 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5279 int fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5280 int o_delete = (oflag & O_DELETE); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5281 oflag = oflag & ~O_DELETE; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5282 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5283 fd = ::open64(path, oflag, mode); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5284 if (fd == -1) return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5285 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5286 //If the open succeeded, the file might still be a directory |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5287 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5288 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5289 int ret = ::fstat64(fd, &buf64); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5290 int st_mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5291 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5292 if (ret != -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5293 if ((st_mode & S_IFMT) == S_IFDIR) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5294 errno = EISDIR; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5295 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5296 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5297 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5298 } else { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5299 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5300 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5301 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5302 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5303 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5304 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5305 * All file descriptors that are opened in the JVM and not |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5306 * specifically destined for a subprocess should have the |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5307 * close-on-exec flag set. If we don't set it, then careless 3rd |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5308 * party native code might fork and exec without closing all |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5309 * appropriate file descriptors (e.g. as we do in closeDescriptors in |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5310 * UNIXProcess.c), and this in turn might: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5311 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5312 * - cause end-of-file to fail to be detected on some file |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5313 * descriptors, resulting in mysterious hangs, or |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5314 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5315 * - might cause an fopen in the subprocess to fail on a system |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5316 * suffering from bug 1085341. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5317 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5318 * (Yes, the default setting of the close-on-exec flag is a Unix |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5319 * design flaw) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5320 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5321 * See: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5322 * 1085341: 32-bit stdio routines should support file descriptors >255 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5323 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5324 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5325 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5326 #ifdef FD_CLOEXEC |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5327 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5328 int flags = ::fcntl(fd, F_GETFD); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5329 if (flags != -1) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5330 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5331 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5332 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5333 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5334 if (o_delete != 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5335 ::unlink(path); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5336 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5337 return fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5338 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5339 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5340 |
| 0 | 5341 // create binary file, rewriting existing file if required |
| 5342 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 5343 int oflags = O_WRONLY | O_CREAT; | |
| 5344 if (!rewrite_existing) { | |
| 5345 oflags |= O_EXCL; | |
| 5346 } | |
| 5347 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 5348 } | |
| 5349 | |
| 5350 // return current position of file pointer | |
| 5351 jlong os::current_file_offset(int fd) { | |
| 5352 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 5353 } | |
| 5354 | |
| 5355 // move file pointer to the specified offset | |
| 5356 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 5357 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 5358 } | |
| 5359 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5360 // This code originates from JDK's sysAvailable |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5361 // from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5362 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5363 int os::available(int fd, jlong *bytes) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5364 jlong cur, end; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5365 int mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5366 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5367 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5368 if (::fstat64(fd, &buf64) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5369 mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5370 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5371 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5372 * XXX: is the following call interruptible? If so, this might |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5373 * need to go through the INTERRUPT_IO() wrapper as for other |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5374 * blocking, interruptible calls in this file. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5375 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5376 int n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5377 if (::ioctl(fd, FIONREAD, &n) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5378 *bytes = n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5379 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5380 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5381 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5382 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5383 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5384 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5385 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5386 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5387 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5388 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5389 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5390 *bytes = end - cur; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5391 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5392 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5393 |
|
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5394 int os::socket_available(int fd, jint *pbytes) { |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5395 // Linux doc says EINTR not returned, unlike Solaris |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5396 int ret = ::ioctl(fd, FIONREAD, pbytes); |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5397 |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5398 //%% note ioctl can return 0 when successful, JVM_SocketAvailable |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5399 // is expected to return 0 on failure and 1 on success to the jdk. |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5400 return (ret < 0) ? 0 : 1; |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5401 } |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5402 |
| 0 | 5403 // Map a block of memory. |
| 6197 | 5404 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 5405 char *addr, size_t bytes, bool read_only, |
| 5406 bool allow_exec) { | |
| 5407 int prot; | |
| 5909 | 5408 int flags = MAP_PRIVATE; |
| 0 | 5409 |
| 5410 if (read_only) { | |
| 5411 prot = PROT_READ; | |
| 5412 } else { | |
| 5413 prot = PROT_READ | PROT_WRITE; | |
| 5414 } | |
| 5415 | |
| 5416 if (allow_exec) { | |
| 5417 prot |= PROT_EXEC; | |
| 5418 } | |
| 5419 | |
| 5420 if (addr != NULL) { | |
| 5421 flags |= MAP_FIXED; | |
| 5422 } | |
| 5423 | |
| 5424 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 5425 fd, file_offset); | |
| 5426 if (mapped_address == MAP_FAILED) { | |
| 5427 return NULL; | |
| 5428 } | |
| 5429 return mapped_address; | |
| 5430 } | |
| 5431 | |
| 5432 | |
| 5433 // Remap a block of memory. | |
| 6197 | 5434 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 5435 char *addr, size_t bytes, bool read_only, |
| 5436 bool allow_exec) { | |
| 5437 // same as map_memory() on this OS | |
| 5438 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 5439 allow_exec); | |
| 5440 } | |
| 5441 | |
| 5442 | |
| 5443 // Unmap a block of memory. | |
| 6197 | 5444 bool os::pd_unmap_memory(char* addr, size_t bytes) { |
| 0 | 5445 return munmap(addr, bytes) == 0; |
| 5446 } | |
| 5447 | |
| 5448 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); | |
| 5449 | |
| 5450 static clockid_t thread_cpu_clockid(Thread* thread) { | |
| 5451 pthread_t tid = thread->osthread()->pthread_id(); | |
| 5452 clockid_t clockid; | |
| 5453 | |
| 5454 // Get thread clockid | |
| 5455 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); | |
| 5456 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); | |
| 5457 return clockid; | |
| 5458 } | |
| 5459 | |
| 5460 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 5461 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 5462 // of a thread. | |
| 5463 // | |
| 5464 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
| 5465 // the fast estimate available on the platform. | |
| 5466 | |
| 5467 jlong os::current_thread_cpu_time() { | |
| 5468 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 5469 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 5470 } else { | |
| 5471 // return user + sys since the cost is the same | |
| 5472 return slow_thread_cpu_time(Thread::current(), true /* user + sys */); | |
| 5473 } | |
| 5474 } | |
| 5475 | |
| 5476 jlong os::thread_cpu_time(Thread* thread) { | |
| 5477 // consistent with what current_thread_cpu_time() returns | |
| 5478 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 5479 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 5480 } else { | |
| 5481 return slow_thread_cpu_time(thread, true /* user + sys */); | |
| 5482 } | |
| 5483 } | |
| 5484 | |
| 5485 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 5486 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 5487 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 5488 } else { | |
| 5489 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 5490 } | |
| 5491 } | |
| 5492 | |
| 5493 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5494 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 5495 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 5496 } else { | |
| 5497 return slow_thread_cpu_time(thread, user_sys_cpu_time); | |
| 5498 } | |
| 5499 } | |
| 5500 | |
| 5501 // | |
| 5502 // -1 on error. | |
| 5503 // | |
| 5504 | |
|
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|
5505 PRAGMA_DIAG_PUSH |
|
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|
5506 PRAGMA_FORMAT_NONLITERAL_IGNORED |
| 0 | 5507 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
| 5508 static bool proc_task_unchecked = true; | |
| 5509 static const char *proc_stat_path = "/proc/%d/stat"; | |
| 5510 pid_t tid = thread->osthread()->thread_id(); | |
| 5511 char *s; | |
| 5512 char stat[2048]; | |
| 5513 int statlen; | |
| 5514 char proc_name[64]; | |
| 5515 int count; | |
| 5516 long sys_time, user_time; | |
|
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|
5517 char cdummy; |
| 0 | 5518 int idummy; |
| 5519 long ldummy; | |
| 5520 FILE *fp; | |
| 5521 | |
| 5522 // The /proc/<tid>/stat aggregates per-process usage on | |
| 5523 // new Linux kernels 2.6+ where NPTL is supported. | |
| 5524 // The /proc/self/task/<tid>/stat still has the per-thread usage. | |
| 5525 // See bug 6328462. | |
|
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|
5526 // There possibly can be cases where there is no directory |
|
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|
5527 // /proc/self/task, so we check its availability. |
| 0 | 5528 if (proc_task_unchecked && os::Linux::is_NPTL()) { |
| 5529 // This is executed only once | |
| 5530 proc_task_unchecked = false; | |
| 5531 fp = fopen("/proc/self/task", "r"); | |
| 5532 if (fp != NULL) { | |
| 5533 proc_stat_path = "/proc/self/task/%d/stat"; | |
| 5534 fclose(fp); | |
| 5535 } | |
| 5536 } | |
| 5537 | |
| 5538 sprintf(proc_name, proc_stat_path, tid); | |
| 5539 fp = fopen(proc_name, "r"); | |
| 5540 if ( fp == NULL ) return -1; | |
| 5541 statlen = fread(stat, 1, 2047, fp); | |
| 5542 stat[statlen] = '\0'; | |
| 5543 fclose(fp); | |
| 5544 | |
| 5545 // Skip pid and the command string. Note that we could be dealing with | |
| 5546 // weird command names, e.g. user could decide to rename java launcher | |
| 5547 // to "java 1.4.2 :)", then the stat file would look like | |
| 5548 // 1234 (java 1.4.2 :)) R ... ... | |
| 5549 // We don't really need to know the command string, just find the last | |
| 5550 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 5551 s = strrchr(stat, ')'); | |
| 5552 if (s == NULL ) return -1; | |
| 5553 | |
| 5554 // Skip blank chars | |
| 5555 do s++; while (isspace(*s)); | |
| 5556 | |
|
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|
5557 count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu", |
|
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|
5558 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, |
| 0 | 5559 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, |
| 5560 &user_time, &sys_time); | |
|
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|
5561 if ( count != 13 ) return -1; |
| 0 | 5562 if (user_sys_cpu_time) { |
| 5563 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); | |
| 5564 } else { | |
| 5565 return (jlong)user_time * (1000000000 / clock_tics_per_sec); | |
| 5566 } | |
| 5567 } | |
|
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|
5568 PRAGMA_DIAG_POP |
| 0 | 5569 |
| 5570 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5571 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5572 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5573 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5574 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 5575 } | |
| 5576 | |
| 5577 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5578 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5579 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5580 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5581 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 5582 } | |
| 5583 | |
| 5584 bool os::is_thread_cpu_time_supported() { | |
| 5585 return true; | |
| 5586 } | |
| 5587 | |
| 5588 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 5589 // Linux doesn't yet have a (official) notion of processor sets, | |
| 5590 // so just return the system wide load average. | |
| 5591 int os::loadavg(double loadavg[], int nelem) { | |
| 5592 return ::getloadavg(loadavg, nelem); | |
| 5593 } | |
| 5594 | |
| 5595 void os::pause() { | |
| 5596 char filename[MAX_PATH]; | |
| 5597 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 5598 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 5599 } else { | |
| 5600 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 5601 } | |
| 5602 | |
| 5603 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 5604 if (fd != -1) { | |
| 5605 struct stat buf; | |
|
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diff
changeset
|
5606 ::close(fd); |
| 0 | 5607 while (::stat(filename, &buf) == 0) { |
| 5608 (void)::poll(NULL, 0, 100); | |
| 5609 } | |
| 5610 } else { | |
| 5611 jio_fprintf(stderr, | |
| 5612 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 5613 } | |
| 5614 } | |
| 5615 | |
| 5616 | |
| 5617 // Refer to the comments in os_solaris.cpp park-unpark. | |
| 5618 // | |
| 5619 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can | |
| 5620 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. | |
| 5621 // For specifics regarding the bug see GLIBC BUGID 261237 : | |
| 5622 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. | |
| 5623 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future | |
| 5624 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar | |
| 5625 // is used. (The simple C test-case provided in the GLIBC bug report manifests the | |
| 5626 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() | |
| 5627 // and monitorenter when we're using 1-0 locking. All those operations may result in | |
| 5628 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version | |
| 5629 // of libpthread avoids the problem, but isn't practical. | |
| 5630 // | |
| 5631 // Possible remedies: | |
| 5632 // | |
| 5633 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. | |
| 5634 // This is palliative and probabilistic, however. If the thread is preempted | |
| 5635 // between the call to compute_abstime() and pthread_cond_timedwait(), more | |
| 5636 // than the minimum period may have passed, and the abstime may be stale (in the | |
| 5637 // past) resultin in a hang. Using this technique reduces the odds of a hang | |
| 5638 // but the JVM is still vulnerable, particularly on heavily loaded systems. | |
| 5639 // | |
| 5640 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead | |
| 5641 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set | |
| 5642 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) | |
| 5643 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant | |
| 5644 // thread. | |
| 5645 // | |
| 5646 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread | |
| 5647 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing | |
| 5648 // a timeout request to the chron thread and then blocking via pthread_cond_wait(). | |
| 5649 // This also works well. In fact it avoids kernel-level scalability impediments | |
| 5650 // on certain platforms that don't handle lots of active pthread_cond_timedwait() | |
| 5651 // timers in a graceful fashion. | |
| 5652 // | |
| 5653 // 4. When the abstime value is in the past it appears that control returns | |
| 5654 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. | |
| 5655 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we | |
| 5656 // can avoid the problem by reinitializing the condvar -- by cond_destroy() | |
| 5657 // followed by cond_init() -- after all calls to pthread_cond_timedwait(). | |
| 5658 // It may be possible to avoid reinitialization by checking the return | |
| 5659 // value from pthread_cond_timedwait(). In addition to reinitializing the | |
| 5660 // condvar we must establish the invariant that cond_signal() is only called | |
| 5661 // within critical sections protected by the adjunct mutex. This prevents | |
| 5662 // cond_signal() from "seeing" a condvar that's in the midst of being | |
| 5663 // reinitialized or that is corrupt. Sadly, this invariant obviates the | |
| 5664 // desirable signal-after-unlock optimization that avoids futile context switching. | |
| 5665 // | |
| 5666 // I'm also concerned that some versions of NTPL might allocate an auxilliary | |
| 5667 // structure when a condvar is used or initialized. cond_destroy() would | |
| 5668 // release the helper structure. Our reinitialize-after-timedwait fix | |
| 5669 // put excessive stress on malloc/free and locks protecting the c-heap. | |
| 5670 // | |
| 5671 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. | |
| 5672 // It may be possible to refine (4) by checking the kernel and NTPL verisons | |
| 5673 // and only enabling the work-around for vulnerable environments. | |
| 5674 | |
| 5675 // utility to compute the abstime argument to timedwait: | |
| 5676 // millis is the relative timeout time | |
| 5677 // abstime will be the absolute timeout time | |
| 5678 // TODO: replace compute_abstime() with unpackTime() | |
| 5679 | |
| 5680 static struct timespec* compute_abstime(timespec* abstime, jlong millis) { | |
| 5681 if (millis < 0) millis = 0; | |
|
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|
5682 |
| 0 | 5683 jlong seconds = millis / 1000; |
| 5684 millis %= 1000; | |
| 5685 if (seconds > 50000000) { // see man cond_timedwait(3T) | |
| 5686 seconds = 50000000; | |
| 5687 } | |
|
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|
5688 |
|
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|
5689 if (os::Linux::supports_monotonic_clock()) { |
|
2e6938dd68f2
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diff
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|
5690 struct timespec now; |
|
2e6938dd68f2
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diff
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|
5691 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
|
2e6938dd68f2
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|
5692 assert_status(status == 0, status, "clock_gettime"); |
|
2e6938dd68f2
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|
5693 abstime->tv_sec = now.tv_sec + seconds; |
|
2e6938dd68f2
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diff
changeset
|
5694 long nanos = now.tv_nsec + millis * NANOSECS_PER_MILLISEC; |
|
2e6938dd68f2
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diff
changeset
|
5695 if (nanos >= NANOSECS_PER_SEC) { |
|
2e6938dd68f2
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diff
changeset
|
5696 abstime->tv_sec += 1; |
|
2e6938dd68f2
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dholmes
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12182
diff
changeset
|
5697 nanos -= NANOSECS_PER_SEC; |
|
2e6938dd68f2
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changeset
|
5698 } |
|
2e6938dd68f2
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12182
diff
changeset
|
5699 abstime->tv_nsec = nanos; |
|
2e6938dd68f2
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|
5700 } else { |
|
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12182
diff
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|
5701 struct timeval now; |
|
2e6938dd68f2
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diff
changeset
|
5702 int status = gettimeofday(&now, NULL); |
|
2e6938dd68f2
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diff
changeset
|
5703 assert(status == 0, "gettimeofday"); |
|
2e6938dd68f2
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changeset
|
5704 abstime->tv_sec = now.tv_sec + seconds; |
|
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changeset
|
5705 long usec = now.tv_usec + millis * 1000; |
|
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changeset
|
5706 if (usec >= 1000000) { |
|
2e6938dd68f2
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changeset
|
5707 abstime->tv_sec += 1; |
|
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diff
changeset
|
5708 usec -= 1000000; |
|
2e6938dd68f2
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|
5709 } |
|
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|
5710 abstime->tv_nsec = usec * 1000; |
|
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|
5711 } |
| 0 | 5712 return abstime; |
| 5713 } | |
| 5714 | |
| 5715 | |
| 5716 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5717 // Conceptually TryPark() should be equivalent to park(0). | |
| 5718 | |
| 5719 int os::PlatformEvent::TryPark() { | |
| 5720 for (;;) { | |
| 5721 const int v = _Event ; | |
| 5722 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5723 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5724 } | |
| 5725 } | |
| 5726 | |
| 5727 void os::PlatformEvent::park() { // AKA "down()" | |
| 5728 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5729 // may call park(). | |
| 5730 // TODO: assert that _Assoc != NULL or _Assoc == Self | |
| 5731 int v ; | |
| 5732 for (;;) { | |
| 5733 v = _Event ; | |
| 5734 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5735 } | |
| 5736 guarantee (v >= 0, "invariant") ; | |
| 5737 if (v == 0) { | |
| 5738 // Do this the hard way by blocking ... | |
| 5739 int status = pthread_mutex_lock(_mutex); | |
| 5740 assert_status(status == 0, status, "mutex_lock"); | |
| 5741 guarantee (_nParked == 0, "invariant") ; | |
| 5742 ++ _nParked ; | |
| 5743 while (_Event < 0) { | |
| 5744 status = pthread_cond_wait(_cond, _mutex); | |
| 5745 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5746 // Treat this the same as if the wait was interrupted | |
| 5747 if (status == ETIME) { status = EINTR; } | |
| 5748 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5749 } | |
| 5750 -- _nParked ; | |
| 5751 | |
| 5752 _Event = 0 ; | |
| 5753 status = pthread_mutex_unlock(_mutex); | |
| 5754 assert_status(status == 0, status, "mutex_unlock"); | |
|
7629
22ba8c8ce6a6
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7456
diff
changeset
|
5755 // Paranoia to ensure our locked and lock-free paths interact |
|
22ba8c8ce6a6
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7456
diff
changeset
|
5756 // correctly with each other. |
|
22ba8c8ce6a6
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parents:
7456
diff
changeset
|
5757 OrderAccess::fence(); |
| 0 | 5758 } |
| 5759 guarantee (_Event >= 0, "invariant") ; | |
| 5760 } | |
| 5761 | |
| 5762 int os::PlatformEvent::park(jlong millis) { | |
| 5763 guarantee (_nParked == 0, "invariant") ; | |
| 5764 | |
| 5765 int v ; | |
| 5766 for (;;) { | |
| 5767 v = _Event ; | |
| 5768 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5769 } | |
| 5770 guarantee (v >= 0, "invariant") ; | |
| 5771 if (v != 0) return OS_OK ; | |
| 5772 | |
| 5773 // We do this the hard way, by blocking the thread. | |
| 5774 // Consider enforcing a minimum timeout value. | |
| 5775 struct timespec abst; | |
| 5776 compute_abstime(&abst, millis); | |
| 5777 | |
| 5778 int ret = OS_TIMEOUT; | |
| 5779 int status = pthread_mutex_lock(_mutex); | |
| 5780 assert_status(status == 0, status, "mutex_lock"); | |
| 5781 guarantee (_nParked == 0, "invariant") ; | |
| 5782 ++_nParked ; | |
| 5783 | |
| 5784 // Object.wait(timo) will return because of | |
| 5785 // (a) notification | |
| 5786 // (b) timeout | |
| 5787 // (c) thread.interrupt | |
| 5788 // | |
| 5789 // Thread.interrupt and object.notify{All} both call Event::set. | |
| 5790 // That is, we treat thread.interrupt as a special case of notification. | |
| 5791 // The underlying Solaris implementation, cond_timedwait, admits | |
| 5792 // spurious/premature wakeups, but the JLS/JVM spec prevents the | |
| 5793 // JVM from making those visible to Java code. As such, we must | |
| 5794 // filter out spurious wakeups. We assume all ETIME returns are valid. | |
| 5795 // | |
| 5796 // TODO: properly differentiate simultaneous notify+interrupt. | |
| 5797 // In that case, we should propagate the notify to another waiter. | |
| 5798 | |
| 5799 while (_Event < 0) { | |
| 5800 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); | |
| 5801 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
| 5802 pthread_cond_destroy (_cond); | |
|
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|
5803 pthread_cond_init (_cond, os::Linux::condAttr()) ; |
| 0 | 5804 } |
| 5805 assert_status(status == 0 || status == EINTR || | |
| 5806 status == ETIME || status == ETIMEDOUT, | |
| 5807 status, "cond_timedwait"); | |
| 5808 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5809 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5810 // We consume and ignore EINTR and spurious wakeups. | |
| 5811 } | |
| 5812 --_nParked ; | |
| 5813 if (_Event >= 0) { | |
| 5814 ret = OS_OK; | |
| 5815 } | |
| 5816 _Event = 0 ; | |
| 5817 status = pthread_mutex_unlock(_mutex); | |
| 5818 assert_status(status == 0, status, "mutex_unlock"); | |
| 5819 assert (_nParked == 0, "invariant") ; | |
|
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|
5820 // Paranoia to ensure our locked and lock-free paths interact |
|
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|
5821 // correctly with each other. |
|
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|
5822 OrderAccess::fence(); |
| 0 | 5823 return ret; |
| 5824 } | |
| 5825 | |
| 5826 void os::PlatformEvent::unpark() { | |
|
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|
5827 // Transitions for _Event: |
|
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|
5828 // 0 :=> 1 |
|
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|
5829 // 1 :=> 1 |
|
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|
5830 // -1 :=> either 0 or 1; must signal target thread |
|
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|
5831 // That is, we can safely transition _Event from -1 to either |
|
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|
5832 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
|
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|
5833 // unpark() calls. |
|
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|
5834 // See also: "Semaphores in Plan 9" by Mullender & Cox |
|
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|
5835 // |
|
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|
5836 // Note: Forcing a transition from "-1" to "1" on an unpark() means |
|
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|
5837 // that it will take two back-to-back park() calls for the owning |
|
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|
5838 // thread to block. This has the benefit of forcing a spurious return |
|
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|
5839 // from the first park() call after an unpark() call which will help |
|
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|
5840 // shake out uses of park() and unpark() without condition variables. |
|
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|
5841 |
|
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|
5842 if (Atomic::xchg(1, &_Event) >= 0) return; |
|
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|
5843 |
|
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|
5844 // Wait for the thread associated with the event to vacate |
|
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|
5845 int status = pthread_mutex_lock(_mutex); |
|
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|
5846 assert_status(status == 0, status, "mutex_lock"); |
|
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|
5847 int AnyWaiters = _nParked; |
|
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|
5848 assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
|
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|
5849 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
|
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|
5850 AnyWaiters = 0; |
|
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|
5851 pthread_cond_signal(_cond); |
|
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|
5852 } |
|
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|
5853 status = pthread_mutex_unlock(_mutex); |
|
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|
5854 assert_status(status == 0, status, "mutex_unlock"); |
|
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|
5855 if (AnyWaiters != 0) { |
|
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|
5856 status = pthread_cond_signal(_cond); |
|
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|
5857 assert_status(status == 0, status, "cond_signal"); |
| 0 | 5858 } |
| 5859 | |
| 5860 // Note that we signal() _after dropping the lock for "immortal" Events. | |
| 5861 // This is safe and avoids a common class of futile wakeups. In rare | |
| 5862 // circumstances this can cause a thread to return prematurely from | |
| 5863 // cond_{timed}wait() but the spurious wakeup is benign and the victim will | |
| 5864 // simply re-test the condition and re-park itself. | |
| 5865 } | |
| 5866 | |
| 5867 | |
| 5868 // JSR166 | |
| 5869 // ------------------------------------------------------- | |
| 5870 | |
| 5871 /* | |
| 5872 * The solaris and linux implementations of park/unpark are fairly | |
| 5873 * conservative for now, but can be improved. They currently use a | |
| 5874 * mutex/condvar pair, plus a a count. | |
| 5875 * Park decrements count if > 0, else does a condvar wait. Unpark | |
| 5876 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5877 * on the condvar. Contention seen when trying to park implies that someone | |
| 5878 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5879 * is no need to track notifications. | |
| 5880 */ | |
| 5881 | |
| 5882 /* | |
| 5883 * This code is common to linux and solaris and will be moved to a | |
| 5884 * common place in dolphin. | |
| 5885 * | |
| 5886 * The passed in time value is either a relative time in nanoseconds | |
| 5887 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5888 * into suitable seconds and nanoseconds components and stored in the | |
| 5889 * given timespec structure. | |
| 5890 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5891 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5892 * overflow if times way in the future are given. Further on Solaris versions | |
| 5893 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5894 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5895 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5896 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5897 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5898 * years from "now". | |
| 5899 */ | |
| 5900 | |
| 5901 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5902 assert (time > 0, "convertTime"); | |
|
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|
5903 time_t max_secs = 0; |
|
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|
5904 |
|
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|
5905 if (!os::Linux::supports_monotonic_clock() || isAbsolute) { |
|
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|
5906 struct timeval now; |
|
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|
5907 int status = gettimeofday(&now, NULL); |
|
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|
5908 assert(status == 0, "gettimeofday"); |
|
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|
5909 |
|
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changeset
|
5910 max_secs = now.tv_sec + MAX_SECS; |
|
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|
5911 |
|
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|
5912 if (isAbsolute) { |
|
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|
5913 jlong secs = time / 1000; |
|
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|
5914 if (secs > max_secs) { |
|
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|
5915 absTime->tv_sec = max_secs; |
|
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|
5916 } else { |
|
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|
5917 absTime->tv_sec = secs; |
|
2e6938dd68f2
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|
5918 } |
|
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changeset
|
5919 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
|
2e6938dd68f2
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|
5920 } else { |
|
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|
5921 jlong secs = time / NANOSECS_PER_SEC; |
|
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|
5922 if (secs >= MAX_SECS) { |
|
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changeset
|
5923 absTime->tv_sec = max_secs; |
|
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|
5924 absTime->tv_nsec = 0; |
|
2e6938dd68f2
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|
5925 } else { |
|
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|
5926 absTime->tv_sec = now.tv_sec + secs; |
|
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changeset
|
5927 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
|
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|
5928 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
|
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changeset
|
5929 absTime->tv_nsec -= NANOSECS_PER_SEC; |
|
2e6938dd68f2
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|
5930 ++absTime->tv_sec; // note: this must be <= max_secs |
|
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|
5931 } |
|
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|
5932 } |
| 0 | 5933 } |
|
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|
5934 } else { |
|
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|
5935 // must be relative using monotonic clock |
|
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|
5936 struct timespec now; |
|
2e6938dd68f2
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|
5937 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
|
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|
5938 assert_status(status == 0, status, "clock_gettime"); |
|
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|
5939 max_secs = now.tv_sec + MAX_SECS; |
| 0 | 5940 jlong secs = time / NANOSECS_PER_SEC; |
| 5941 if (secs >= MAX_SECS) { | |
| 5942 absTime->tv_sec = max_secs; | |
| 5943 absTime->tv_nsec = 0; | |
|
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|
5944 } else { |
| 0 | 5945 absTime->tv_sec = now.tv_sec + secs; |
|
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|
5946 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_nsec; |
| 0 | 5947 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
| 5948 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5949 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5950 } | |
| 5951 } | |
| 5952 } | |
| 5953 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5954 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5955 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5956 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5957 } | |
| 5958 | |
| 5959 void Parker::park(bool isAbsolute, jlong time) { | |
|
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|
5960 // Ideally we'd do something useful while spinning, such |
|
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|
5961 // as calling unpackTime(). |
|
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|
5962 |
| 0 | 5963 // Optional fast-path check: |
| 5964 // Return immediately if a permit is available. | |
|
7629
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|
5965 // We depend on Atomic::xchg() having full barrier semantics |
|
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changeset
|
5966 // since we are doing a lock-free update to _counter. |
|
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changeset
|
5967 if (Atomic::xchg(0, &_counter) > 0) return; |
| 0 | 5968 |
| 5969 Thread* thread = Thread::current(); | |
| 5970 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5971 JavaThread *jt = (JavaThread *)thread; | |
| 5972 | |
| 5973 // Optional optimization -- avoid state transitions if there's an interrupt pending. | |
| 5974 // Check interrupt before trying to wait | |
| 5975 if (Thread::is_interrupted(thread, false)) { | |
| 5976 return; | |
| 5977 } | |
| 5978 | |
| 5979 // Next, demultiplex/decode time arguments | |
| 5980 timespec absTime; | |
|
1865
1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
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1750
diff
changeset
|
5981 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
| 0 | 5982 return; |
| 5983 } | |
| 5984 if (time > 0) { | |
| 5985 unpackTime(&absTime, isAbsolute, time); | |
| 5986 } | |
| 5987 | |
| 5988 | |
| 5989 // Enter safepoint region | |
| 5990 // Beware of deadlocks such as 6317397. | |
| 5991 // The per-thread Parker:: mutex is a classic leaf-lock. | |
| 5992 // In particular a thread must never block on the Threads_lock while | |
| 5993 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5994 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5995 ThreadBlockInVM tbivm(jt); | |
| 5996 | |
| 5997 // Don't wait if cannot get lock since interference arises from | |
| 5998 // unblocking. Also. check interrupt before trying wait | |
| 5999 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { | |
| 6000 return; | |
| 6001 } | |
| 6002 | |
| 6003 int status ; | |
| 6004 if (_counter > 0) { // no wait needed | |
| 6005 _counter = 0; | |
| 6006 status = pthread_mutex_unlock(_mutex); | |
| 6007 assert (status == 0, "invariant") ; | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6008 // Paranoia to ensure our locked and lock-free paths interact |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6009 // correctly with each other and Java-level accesses. |
|
1117
95e9083cf4a7
6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
parents:
1010
diff
changeset
|
6010 OrderAccess::fence(); |
| 0 | 6011 return; |
| 6012 } | |
| 6013 | |
| 6014 #ifdef ASSERT | |
| 6015 // Don't catch signals while blocked; let the running threads have the signals. | |
| 6016 // (This allows a debugger to break into the running thread.) | |
| 6017 sigset_t oldsigs; | |
| 6018 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); | |
| 6019 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 6020 #endif | |
| 6021 | |
| 6022 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 6023 jt->set_suspend_equivalent(); | |
| 6024 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 6025 | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6026 assert(_cur_index == -1, "invariant"); |
| 0 | 6027 if (time == 0) { |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6028 _cur_index = REL_INDEX; // arbitrary choice when not timed |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6029 status = pthread_cond_wait (&_cond[_cur_index], _mutex) ; |
| 0 | 6030 } else { |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6031 _cur_index = isAbsolute ? ABS_INDEX : REL_INDEX; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6032 status = os::Linux::safe_cond_timedwait (&_cond[_cur_index], _mutex, &absTime) ; |
| 0 | 6033 if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6034 pthread_cond_destroy (&_cond[_cur_index]) ; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6035 pthread_cond_init (&_cond[_cur_index], isAbsolute ? NULL : os::Linux::condAttr()); |
| 0 | 6036 } |
| 6037 } | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6038 _cur_index = -1; |
| 0 | 6039 assert_status(status == 0 || status == EINTR || |
| 6040 status == ETIME || status == ETIMEDOUT, | |
| 6041 status, "cond_timedwait"); | |
| 6042 | |
| 6043 #ifdef ASSERT | |
| 6044 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); | |
| 6045 #endif | |
| 6046 | |
| 6047 _counter = 0 ; | |
| 6048 status = pthread_mutex_unlock(_mutex) ; | |
| 6049 assert_status(status == 0, status, "invariant") ; | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6050 // Paranoia to ensure our locked and lock-free paths interact |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6051 // correctly with each other and Java-level accesses. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6052 OrderAccess::fence(); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6053 |
| 0 | 6054 // If externally suspended while waiting, re-suspend |
| 6055 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 6056 jt->java_suspend_self(); | |
| 6057 } | |
| 6058 } | |
| 6059 | |
| 6060 void Parker::unpark() { | |
| 6061 int s, status ; | |
| 6062 status = pthread_mutex_lock(_mutex); | |
| 6063 assert (status == 0, "invariant") ; | |
| 6064 s = _counter; | |
| 6065 _counter = 1; | |
| 6066 if (s < 1) { | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6067 // thread might be parked |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6068 if (_cur_index != -1) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6069 // thread is definitely parked |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6070 if (WorkAroundNPTLTimedWaitHang) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6071 status = pthread_cond_signal (&_cond[_cur_index]); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6072 assert (status == 0, "invariant"); |
| 0 | 6073 status = pthread_mutex_unlock(_mutex); |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6074 assert (status == 0, "invariant"); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6075 } else { |
|
23418
54203a323126
8029453: java/util/concurrent/locks/ReentrantLock/TimeoutLockLoops.java failed by timeout
dholmes
parents:
23020
diff
changeset
|
6076 // must capture correct index before unlocking |
|
54203a323126
8029453: java/util/concurrent/locks/ReentrantLock/TimeoutLockLoops.java failed by timeout
dholmes
parents:
23020
diff
changeset
|
6077 int index = _cur_index; |
| 0 | 6078 status = pthread_mutex_unlock(_mutex); |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6079 assert (status == 0, "invariant"); |
|
23418
54203a323126
8029453: java/util/concurrent/locks/ReentrantLock/TimeoutLockLoops.java failed by timeout
dholmes
parents:
23020
diff
changeset
|
6080 status = pthread_cond_signal (&_cond[index]); |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6081 assert (status == 0, "invariant"); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6082 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6083 } else { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6084 pthread_mutex_unlock(_mutex); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6085 assert (status == 0, "invariant") ; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6086 } |
| 0 | 6087 } else { |
| 6088 pthread_mutex_unlock(_mutex); | |
| 6089 assert (status == 0, "invariant") ; | |
| 6090 } | |
| 6091 } | |
| 6092 | |
| 6093 | |
| 6094 extern char** environ; | |
| 6095 | |
| 6096 // Run the specified command in a separate process. Return its exit value, | |
| 6097 // or -1 on failure (e.g. can't fork a new process). | |
| 6098 // Unlike system(), this function can be called from signal handler. It | |
| 6099 // doesn't block SIGINT et al. | |
| 6100 int os::fork_and_exec(char* cmd) { | |
|
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
6101 const char * argv[4] = {"sh", "-c", cmd, NULL}; |
| 0 | 6102 |
|
22989
915ca3e9d15e
8078470: [Linux] Replace syscall use in os::fork_and_exec with glibc fork() and execve()
dholmes
parents:
22883
diff
changeset
|
6103 pid_t pid = fork(); |
| 0 | 6104 |
| 6105 if (pid < 0) { | |
| 6106 // fork failed | |
| 6107 return -1; | |
| 6108 | |
| 6109 } else if (pid == 0) { | |
| 6110 // child process | |
| 6111 | |
|
22989
915ca3e9d15e
8078470: [Linux] Replace syscall use in os::fork_and_exec with glibc fork() and execve()
dholmes
parents:
22883
diff
changeset
|
6112 execve("/bin/sh", (char* const*)argv, environ); |
| 0 | 6113 |
| 6114 // execve failed | |
| 6115 _exit(-1); | |
| 6116 | |
| 6117 } else { | |
| 6118 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 6119 // care about the actual exit code, for now. | |
| 6120 | |
| 6121 int status; | |
| 6122 | |
| 6123 // Wait for the child process to exit. This returns immediately if | |
| 6124 // the child has already exited. */ | |
| 6125 while (waitpid(pid, &status, 0) < 0) { | |
| 6126 switch (errno) { | |
| 6127 case ECHILD: return 0; | |
| 6128 case EINTR: break; | |
| 6129 default: return -1; | |
| 6130 } | |
| 6131 } | |
| 6132 | |
| 6133 if (WIFEXITED(status)) { | |
| 6134 // The child exited normally; get its exit code. | |
| 6135 return WEXITSTATUS(status); | |
| 6136 } else if (WIFSIGNALED(status)) { | |
| 6137 // The child exited because of a signal | |
| 6138 // The best value to return is 0x80 + signal number, | |
| 6139 // because that is what all Unix shells do, and because | |
| 6140 // it allows callers to distinguish between process exit and | |
| 6141 // process death by signal. | |
| 6142 return 0x80 + WTERMSIG(status); | |
| 6143 } else { | |
| 6144 // Unknown exit code; pass it through | |
| 6145 return status; | |
| 6146 } | |
| 6147 } | |
| 6148 } | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6149 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6150 // is_headless_jre() |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6151 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6152 // Test for the existence of xawt/libmawt.so or libawt_xawt.so |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6153 // in order to report if we are running in a headless jre |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6154 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6155 // Since JDK8 xawt/libmawt.so was moved into the same directory |
|
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6156 // as libawt.so, and renamed libawt_xawt.so |
|
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6157 // |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6158 bool os::is_headless_jre() { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6159 struct stat statbuf; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6160 char buf[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6161 char libmawtpath[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6162 const char *xawtstr = "/xawt/libmawt.so"; |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6163 const char *new_xawtstr = "/libawt_xawt.so"; |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6164 char *p; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6165 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6166 // Get path to libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6167 os::jvm_path(buf, sizeof(buf)); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6168 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6169 // Get rid of libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6170 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6171 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6172 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6173 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6174 // Get rid of client or server |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6175 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6176 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6177 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6178 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6179 // check xawt/libmawt.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6180 strcpy(libmawtpath, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6181 strcat(libmawtpath, xawtstr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6182 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6183 |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6184 // check libawt_xawt.so |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6185 strcpy(libmawtpath, buf); |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6186 strcat(libmawtpath, new_xawtstr); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6187 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6188 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6189 return true; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6190 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6191 |
|
6200
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6192 // Get the default path to the core file |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6193 // Returns the length of the string |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6194 int os::get_core_path(char* buffer, size_t bufferSize) { |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6195 const char* p = get_current_directory(buffer, bufferSize); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6196 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6197 if (p == NULL) { |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6198 assert(p != NULL, "failed to get current directory"); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6199 return 0; |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6200 } |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6201 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6202 return strlen(buffer); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6203 } |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
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|
6204 |
|
12110
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|
6205 /////////////// Unit tests /////////////// |
|
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|
6206 |
|
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|
6207 #ifndef PRODUCT |
|
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|
6208 |
|
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|
6209 #define test_log(...) \ |
|
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|
6210 do {\ |
|
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|
6211 if (VerboseInternalVMTests) { \ |
|
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|
6212 tty->print_cr(__VA_ARGS__); \ |
|
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|
6213 tty->flush(); \ |
|
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|
6214 }\ |
|
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|
6215 } while (false) |
|
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|
6216 |
|
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|
6217 class TestReserveMemorySpecial : AllStatic { |
|
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|
6218 public: |
|
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|
6219 static void small_page_write(void* addr, size_t size) { |
|
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|
6220 size_t page_size = os::vm_page_size(); |
|
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|
6221 |
|
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|
6222 char* end = (char*)addr + size; |
|
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6223 for (char* p = (char*)addr; p < end; p += page_size) { |
|
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|
6224 *p = 1; |
|
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|
6225 } |
|
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|
6226 } |
|
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changeset
|
6227 |
|
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|
6228 static void test_reserve_memory_special_huge_tlbfs_only(size_t size) { |
|
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|
6229 if (!UseHugeTLBFS) { |
|
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|
6230 return; |
|
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|
6231 } |
|
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|
6232 |
|
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|
6233 test_log("test_reserve_memory_special_huge_tlbfs_only(" SIZE_FORMAT ")", size); |
|
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changeset
|
6234 |
|
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|
6235 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_only(size, NULL, false); |
|
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|
6236 |
|
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|
6237 if (addr != NULL) { |
|
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|
6238 small_page_write(addr, size); |
|
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|
6239 |
|
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|
6240 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
|
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|
6241 } |
|
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|
6242 } |
|
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changeset
|
6243 |
|
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|
6244 static void test_reserve_memory_special_huge_tlbfs_only() { |
|
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|
6245 if (!UseHugeTLBFS) { |
|
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|
6246 return; |
|
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|
6247 } |
|
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changeset
|
6248 |
|
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|
6249 size_t lp = os::large_page_size(); |
|
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|
6250 |
|
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|
6251 for (size_t size = lp; size <= lp * 10; size += lp) { |
|
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|
6252 test_reserve_memory_special_huge_tlbfs_only(size); |
|
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|
6253 } |
|
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|
6254 } |
|
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changeset
|
6255 |
|
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|
6256 static void test_reserve_memory_special_huge_tlbfs_mixed() { |
|
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|
6257 size_t lp = os::large_page_size(); |
|
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|
6258 size_t ag = os::vm_allocation_granularity(); |
|
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|
6259 |
|
24006
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|
6260 // sizes to test |
|
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|
6261 const size_t sizes[] = { |
|
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|
6262 lp, lp + ag, lp + lp / 2, lp * 2, |
|
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|
6263 lp * 2 + ag, lp * 2 - ag, lp * 2 + lp / 2, |
|
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|
6264 lp * 10, lp * 10 + lp / 2 |
|
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|
6265 }; |
|
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|
6266 const int num_sizes = sizeof(sizes) / sizeof(size_t); |
|
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|
6267 |
|
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|
6268 // For each size/alignment combination, we test three scenarios: |
|
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|
6269 // 1) with req_addr == NULL |
|
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|
6270 // 2) with a non-null req_addr at which we expect to successfully allocate |
|
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|
6271 // 3) with a non-null req_addr which contains a pre-existing mapping, at which we |
|
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|
6272 // expect the allocation to either fail or to ignore req_addr |
|
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|
6273 |
|
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|
6274 // Pre-allocate two areas; they shall be as large as the largest allocation |
|
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|
6275 // and aligned to the largest alignment we will be testing. |
|
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|
6276 const size_t mapping_size = sizes[num_sizes - 1] * 2; |
|
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|
6277 char* const mapping1 = (char*) ::mmap(NULL, mapping_size, |
|
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|
6278 PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
|
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|
6279 -1, 0); |
|
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|
6280 assert(mapping1 != MAP_FAILED, "should work"); |
|
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|
6281 |
|
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changeset
|
6282 char* const mapping2 = (char*) ::mmap(NULL, mapping_size, |
|
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|
6283 PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
|
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|
6284 -1, 0); |
|
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changeset
|
6285 assert(mapping2 != MAP_FAILED, "should work"); |
|
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changeset
|
6286 |
|
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changeset
|
6287 // Unmap the first mapping, but leave the second mapping intact: the first |
|
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|
6288 // mapping will serve as a value for a "good" req_addr (case 2). The second |
|
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|
6289 // mapping, still intact, as "bad" req_addr (case 3). |
|
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|
6290 ::munmap(mapping1, mapping_size); |
|
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|
6291 |
|
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|
6292 // Case 1 |
|
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|
6293 test_log("%s, req_addr NULL:", __FUNCTION__); |
|
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|
6294 test_log("size align result"); |
|
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|
6295 |
|
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|
6296 for (int i = 0; i < num_sizes; i++) { |
|
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|
6297 const size_t size = sizes[i]; |
|
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|
6298 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
|
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|
6299 char* p = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, NULL, false); |
|
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|
6300 test_log(SIZE_FORMAT_HEX " " SIZE_FORMAT_HEX " -> " PTR_FORMAT " %s", |
|
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|
6301 size, alignment, p, (p != NULL ? "" : "(failed)")); |
|
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|
6302 if (p != NULL) { |
|
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|
6303 assert(is_ptr_aligned(p, alignment), "must be"); |
|
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|
6304 small_page_write(p, size); |
|
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|
6305 os::Linux::release_memory_special_huge_tlbfs(p, size); |
|
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|
6306 } |
|
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|
6307 } |
|
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|
6308 } |
|
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changeset
|
6309 |
|
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|
6310 // Case 2 |
|
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|
6311 test_log("%s, req_addr non-NULL:", __FUNCTION__); |
|
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|
6312 test_log("size align req_addr result"); |
|
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|
6313 |
|
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|
6314 for (int i = 0; i < num_sizes; i++) { |
|
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|
6315 const size_t size = sizes[i]; |
|
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6316 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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6317 char* const req_addr = (char*) align_ptr_up(mapping1, alignment); |
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6318 char* p = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, req_addr, false); |
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6319 test_log(SIZE_FORMAT_HEX " " SIZE_FORMAT_HEX " " PTR_FORMAT " -> " PTR_FORMAT " %s", |
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6320 size, alignment, req_addr, p, |
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6321 ((p != NULL ? (p == req_addr ? "(exact match)" : "") : "(failed)"))); |
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6322 if (p != NULL) { |
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6323 assert(p == req_addr, "must be"); |
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6324 small_page_write(p, size); |
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6325 os::Linux::release_memory_special_huge_tlbfs(p, size); |
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6326 } |
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6327 } |
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6328 } |
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6329 |
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6330 // Case 3 |
|
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6331 test_log("%s, req_addr non-NULL with preexisting mapping:", __FUNCTION__); |
|
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6332 test_log("size align req_addr result"); |
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6333 |
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6334 for (int i = 0; i < num_sizes; i++) { |
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6335 const size_t size = sizes[i]; |
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6336 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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6337 char* const req_addr = (char*) align_ptr_up(mapping2, alignment); |
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6338 char* p = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, req_addr, false); |
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6339 test_log(SIZE_FORMAT_HEX " " SIZE_FORMAT_HEX " " PTR_FORMAT " -> " PTR_FORMAT " %s", |
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6340 size, alignment, req_addr, p, |
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6341 ((p != NULL ? "" : "(failed)"))); |
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6342 // as the area around req_addr contains already existing mappings, the API should always |
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6343 // return NULL (as per contract, it cannot return another address) |
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6344 assert(p == NULL, "must be"); |
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6345 } |
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6346 } |
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|
6347 |
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6348 ::munmap(mapping2, mapping_size); |
|
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6349 |
|
12110
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|
6350 } |
|
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|
6351 |
|
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|
6352 static void test_reserve_memory_special_huge_tlbfs() { |
|
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6353 if (!UseHugeTLBFS) { |
|
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|
6354 return; |
|
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|
6355 } |
|
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|
6356 |
|
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|
6357 test_reserve_memory_special_huge_tlbfs_only(); |
|
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|
6358 test_reserve_memory_special_huge_tlbfs_mixed(); |
|
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|
6359 } |
|
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|
6360 |
|
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|
6361 static void test_reserve_memory_special_shm(size_t size, size_t alignment) { |
|
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|
6362 if (!UseSHM) { |
|
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|
6363 return; |
|
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|
6364 } |
|
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|
6365 |
|
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|
6366 test_log("test_reserve_memory_special_shm(" SIZE_FORMAT ", " SIZE_FORMAT ")", size, alignment); |
|
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|
6367 |
|
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|
6368 char* addr = os::Linux::reserve_memory_special_shm(size, alignment, NULL, false); |
|
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|
6369 |
|
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|
6370 if (addr != NULL) { |
|
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|
6371 assert(is_ptr_aligned(addr, alignment), "Check"); |
|
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|
6372 assert(is_ptr_aligned(addr, os::large_page_size()), "Check"); |
|
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|
6373 |
|
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|
6374 small_page_write(addr, size); |
|
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|
6375 |
|
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|
6376 os::Linux::release_memory_special_shm(addr, size); |
|
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|
6377 } |
|
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|
6378 } |
|
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changeset
|
6379 |
|
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|
6380 static void test_reserve_memory_special_shm() { |
|
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6381 size_t lp = os::large_page_size(); |
|
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|
6382 size_t ag = os::vm_allocation_granularity(); |
|
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|
6383 |
|
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|
6384 for (size_t size = ag; size < lp * 3; size += ag) { |
|
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|
6385 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
|
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|
6386 test_reserve_memory_special_shm(size, alignment); |
|
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|
6387 } |
|
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|
6388 } |
|
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changeset
|
6389 } |
|
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changeset
|
6390 |
|
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|
6391 static void test() { |
|
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|
6392 test_reserve_memory_special_huge_tlbfs(); |
|
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|
6393 test_reserve_memory_special_shm(); |
|
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|
6394 } |
|
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changeset
|
6395 }; |
|
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changeset
|
6396 |
|
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|
6397 void TestReserveMemorySpecial_test() { |
|
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|
6398 TestReserveMemorySpecial::test(); |
|
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|
6399 } |
|
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changeset
|
6400 |
|
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|
6401 #endif |