Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/os.cpp @ 6985:80e866b1d053
Merge
| author | coleenp |
|---|---|
| date | Fri, 16 Nov 2012 09:19:12 -0500 |
| parents | 6cb0d32b828b e4f764ddb06a |
| children | 2cb439954abf f34d701e952e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/javaClasses.hpp" | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "code/icBuffer.hpp" | |
| 31 #include "code/vtableStubs.hpp" | |
| 32 #include "gc_implementation/shared/vmGCOperations.hpp" | |
| 33 #include "interpreter/interpreter.hpp" | |
| 34 #include "memory/allocation.inline.hpp" | |
| 35 #include "oops/oop.inline.hpp" | |
| 36 #include "prims/jvm.h" | |
| 37 #include "prims/jvm_misc.hpp" | |
| 38 #include "prims/privilegedStack.hpp" | |
| 39 #include "runtime/arguments.hpp" | |
| 40 #include "runtime/frame.inline.hpp" | |
| 41 #include "runtime/interfaceSupport.hpp" | |
| 42 #include "runtime/java.hpp" | |
| 43 #include "runtime/javaCalls.hpp" | |
| 44 #include "runtime/mutexLocker.hpp" | |
| 45 #include "runtime/os.hpp" | |
| 46 #include "runtime/stubRoutines.hpp" | |
| 47 #include "services/attachListener.hpp" | |
| 6197 | 48 #include "services/memTracker.hpp" |
| 1972 | 49 #include "services/threadService.hpp" |
| 50 #include "utilities/defaultStream.hpp" | |
| 51 #include "utilities/events.hpp" | |
| 52 #ifdef TARGET_OS_FAMILY_linux | |
| 53 # include "os_linux.inline.hpp" | |
| 54 # include "thread_linux.inline.hpp" | |
| 55 #endif | |
| 56 #ifdef TARGET_OS_FAMILY_solaris | |
| 57 # include "os_solaris.inline.hpp" | |
| 58 # include "thread_solaris.inline.hpp" | |
| 59 #endif | |
| 60 #ifdef TARGET_OS_FAMILY_windows | |
| 61 # include "os_windows.inline.hpp" | |
| 62 # include "thread_windows.inline.hpp" | |
| 63 #endif | |
| 3960 | 64 #ifdef TARGET_OS_FAMILY_bsd |
| 65 # include "os_bsd.inline.hpp" | |
| 66 # include "thread_bsd.inline.hpp" | |
| 67 #endif | |
| 0 | 68 |
| 69 # include <signal.h> | |
| 70 | |
| 71 OSThread* os::_starting_thread = NULL; | |
| 72 address os::_polling_page = NULL; | |
| 73 volatile int32_t* os::_mem_serialize_page = NULL; | |
| 74 uintptr_t os::_serialize_page_mask = 0; | |
| 75 long os::_rand_seed = 1; | |
| 76 int os::_processor_count = 0; | |
| 77 size_t os::_page_sizes[os::page_sizes_max]; | |
| 78 | |
| 79 #ifndef PRODUCT | |
| 2250 | 80 julong os::num_mallocs = 0; // # of calls to malloc/realloc |
| 81 julong os::alloc_bytes = 0; // # of bytes allocated | |
| 82 julong os::num_frees = 0; // # of calls to free | |
| 83 julong os::free_bytes = 0; // # of bytes freed | |
| 0 | 84 #endif |
| 85 | |
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86 void os_init_globals() { |
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87 // Called from init_globals(). |
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88 // See Threads::create_vm() in thread.cpp, and init.cpp. |
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89 os::init_globals(); |
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90 } |
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91 |
| 0 | 92 // Fill in buffer with current local time as an ISO-8601 string. |
| 93 // E.g., yyyy-mm-ddThh:mm:ss-zzzz. | |
| 94 // Returns buffer, or NULL if it failed. | |
| 95 // This would mostly be a call to | |
| 96 // strftime(...., "%Y-%m-%d" "T" "%H:%M:%S" "%z", ....) | |
| 97 // except that on Windows the %z behaves badly, so we do it ourselves. | |
| 98 // Also, people wanted milliseconds on there, | |
| 99 // and strftime doesn't do milliseconds. | |
| 100 char* os::iso8601_time(char* buffer, size_t buffer_length) { | |
| 101 // Output will be of the form "YYYY-MM-DDThh:mm:ss.mmm+zzzz\0" | |
| 102 // 1 2 | |
| 103 // 12345678901234567890123456789 | |
| 104 static const char* iso8601_format = | |
| 105 "%04d-%02d-%02dT%02d:%02d:%02d.%03d%c%02d%02d"; | |
| 106 static const size_t needed_buffer = 29; | |
| 107 | |
| 108 // Sanity check the arguments | |
| 109 if (buffer == NULL) { | |
| 110 assert(false, "NULL buffer"); | |
| 111 return NULL; | |
| 112 } | |
| 113 if (buffer_length < needed_buffer) { | |
| 114 assert(false, "buffer_length too small"); | |
| 115 return NULL; | |
| 116 } | |
| 117 // Get the current time | |
| 61 | 118 jlong milliseconds_since_19700101 = javaTimeMillis(); |
| 0 | 119 const int milliseconds_per_microsecond = 1000; |
| 120 const time_t seconds_since_19700101 = | |
| 121 milliseconds_since_19700101 / milliseconds_per_microsecond; | |
| 122 const int milliseconds_after_second = | |
| 123 milliseconds_since_19700101 % milliseconds_per_microsecond; | |
| 124 // Convert the time value to a tm and timezone variable | |
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125 struct tm time_struct; |
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126 if (localtime_pd(&seconds_since_19700101, &time_struct) == NULL) { |
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127 assert(false, "Failed localtime_pd"); |
| 0 | 128 return NULL; |
| 129 } | |
| 3960 | 130 #if defined(_ALLBSD_SOURCE) |
| 131 const time_t zone = (time_t) time_struct.tm_gmtoff; | |
| 132 #else | |
| 0 | 133 const time_t zone = timezone; |
| 3960 | 134 #endif |
| 0 | 135 |
| 136 // If daylight savings time is in effect, | |
| 137 // we are 1 hour East of our time zone | |
| 138 const time_t seconds_per_minute = 60; | |
| 139 const time_t minutes_per_hour = 60; | |
| 140 const time_t seconds_per_hour = seconds_per_minute * minutes_per_hour; | |
| 141 time_t UTC_to_local = zone; | |
| 142 if (time_struct.tm_isdst > 0) { | |
| 143 UTC_to_local = UTC_to_local - seconds_per_hour; | |
| 144 } | |
| 145 // Compute the time zone offset. | |
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146 // localtime_pd() sets timezone to the difference (in seconds) |
| 0 | 147 // between UTC and and local time. |
| 148 // ISO 8601 says we need the difference between local time and UTC, | |
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149 // we change the sign of the localtime_pd() result. |
| 0 | 150 const time_t local_to_UTC = -(UTC_to_local); |
| 151 // Then we have to figure out if if we are ahead (+) or behind (-) UTC. | |
| 152 char sign_local_to_UTC = '+'; | |
| 153 time_t abs_local_to_UTC = local_to_UTC; | |
| 154 if (local_to_UTC < 0) { | |
| 155 sign_local_to_UTC = '-'; | |
| 156 abs_local_to_UTC = -(abs_local_to_UTC); | |
| 157 } | |
| 158 // Convert time zone offset seconds to hours and minutes. | |
| 159 const time_t zone_hours = (abs_local_to_UTC / seconds_per_hour); | |
| 160 const time_t zone_min = | |
| 161 ((abs_local_to_UTC % seconds_per_hour) / seconds_per_minute); | |
| 162 | |
| 163 // Print an ISO 8601 date and time stamp into the buffer | |
| 164 const int year = 1900 + time_struct.tm_year; | |
| 165 const int month = 1 + time_struct.tm_mon; | |
| 166 const int printed = jio_snprintf(buffer, buffer_length, iso8601_format, | |
| 167 year, | |
| 168 month, | |
| 169 time_struct.tm_mday, | |
| 170 time_struct.tm_hour, | |
| 171 time_struct.tm_min, | |
| 172 time_struct.tm_sec, | |
| 173 milliseconds_after_second, | |
| 174 sign_local_to_UTC, | |
| 175 zone_hours, | |
| 176 zone_min); | |
| 177 if (printed == 0) { | |
| 178 assert(false, "Failed jio_printf"); | |
| 179 return NULL; | |
| 180 } | |
| 181 return buffer; | |
| 182 } | |
| 183 | |
| 184 OSReturn os::set_priority(Thread* thread, ThreadPriority p) { | |
| 185 #ifdef ASSERT | |
| 186 if (!(!thread->is_Java_thread() || | |
| 187 Thread::current() == thread || | |
| 188 Threads_lock->owned_by_self() | |
| 189 || thread->is_Compiler_thread() | |
| 190 )) { | |
| 191 assert(false, "possibility of dangling Thread pointer"); | |
| 192 } | |
| 193 #endif | |
| 194 | |
| 195 if (p >= MinPriority && p <= MaxPriority) { | |
| 196 int priority = java_to_os_priority[p]; | |
| 197 return set_native_priority(thread, priority); | |
| 198 } else { | |
| 199 assert(false, "Should not happen"); | |
| 200 return OS_ERR; | |
| 201 } | |
| 202 } | |
| 203 | |
| 6766 | 204 // The mapping from OS priority back to Java priority may be inexact because |
| 205 // Java priorities can map M:1 with native priorities. If you want the definite | |
| 206 // Java priority then use JavaThread::java_priority() | |
| 0 | 207 OSReturn os::get_priority(const Thread* const thread, ThreadPriority& priority) { |
| 208 int p; | |
| 209 int os_prio; | |
| 210 OSReturn ret = get_native_priority(thread, &os_prio); | |
| 211 if (ret != OS_OK) return ret; | |
| 212 | |
| 6766 | 213 if (java_to_os_priority[MaxPriority] > java_to_os_priority[MinPriority]) { |
| 214 for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ; | |
| 215 } else { | |
| 216 // niceness values are in reverse order | |
| 217 for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] < os_prio; p--) ; | |
| 218 } | |
| 0 | 219 priority = (ThreadPriority)p; |
| 220 return OS_OK; | |
| 221 } | |
| 222 | |
| 223 | |
| 224 // --------------------- sun.misc.Signal (optional) --------------------- | |
| 225 | |
| 226 | |
| 227 // SIGBREAK is sent by the keyboard to query the VM state | |
| 228 #ifndef SIGBREAK | |
| 229 #define SIGBREAK SIGQUIT | |
| 230 #endif | |
| 231 | |
| 232 // sigexitnum_pd is a platform-specific special signal used for terminating the Signal thread. | |
| 233 | |
| 234 | |
| 235 static void signal_thread_entry(JavaThread* thread, TRAPS) { | |
| 236 os::set_priority(thread, NearMaxPriority); | |
| 237 while (true) { | |
| 238 int sig; | |
| 239 { | |
| 240 // FIXME : Currently we have not decieded what should be the status | |
| 241 // for this java thread blocked here. Once we decide about | |
| 242 // that we should fix this. | |
| 243 sig = os::signal_wait(); | |
| 244 } | |
| 245 if (sig == os::sigexitnum_pd()) { | |
| 246 // Terminate the signal thread | |
| 247 return; | |
| 248 } | |
| 249 | |
| 250 switch (sig) { | |
| 251 case SIGBREAK: { | |
| 252 // Check if the signal is a trigger to start the Attach Listener - in that | |
| 253 // case don't print stack traces. | |
| 254 if (!DisableAttachMechanism && AttachListener::is_init_trigger()) { | |
| 255 continue; | |
| 256 } | |
| 257 // Print stack traces | |
| 258 // Any SIGBREAK operations added here should make sure to flush | |
| 259 // the output stream (e.g. tty->flush()) after output. See 4803766. | |
| 260 // Each module also prints an extra carriage return after its output. | |
| 261 VM_PrintThreads op; | |
| 262 VMThread::execute(&op); | |
| 263 VM_PrintJNI jni_op; | |
| 264 VMThread::execute(&jni_op); | |
| 265 VM_FindDeadlocks op1(tty); | |
| 266 VMThread::execute(&op1); | |
| 267 Universe::print_heap_at_SIGBREAK(); | |
| 268 if (PrintClassHistogram) { | |
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269 VM_GC_HeapInspection op1(gclog_or_tty, true /* force full GC before heap inspection */, |
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270 true /* need_prologue */); |
| 0 | 271 VMThread::execute(&op1); |
| 272 } | |
| 273 if (JvmtiExport::should_post_data_dump()) { | |
| 274 JvmtiExport::post_data_dump(); | |
| 275 } | |
| 276 break; | |
| 277 } | |
| 278 default: { | |
| 279 // Dispatch the signal to java | |
| 280 HandleMark hm(THREAD); | |
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281 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_Signal(), THREAD); |
| 0 | 282 KlassHandle klass (THREAD, k); |
| 283 if (klass.not_null()) { | |
| 284 JavaValue result(T_VOID); | |
| 285 JavaCallArguments args; | |
| 286 args.push_int(sig); | |
| 287 JavaCalls::call_static( | |
| 288 &result, | |
| 289 klass, | |
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290 vmSymbols::dispatch_name(), |
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291 vmSymbols::int_void_signature(), |
| 0 | 292 &args, |
| 293 THREAD | |
| 294 ); | |
| 295 } | |
| 296 if (HAS_PENDING_EXCEPTION) { | |
| 297 // tty is initialized early so we don't expect it to be null, but | |
| 298 // if it is we can't risk doing an initialization that might | |
| 299 // trigger additional out-of-memory conditions | |
| 300 if (tty != NULL) { | |
| 301 char klass_name[256]; | |
| 302 char tmp_sig_name[16]; | |
| 303 const char* sig_name = "UNKNOWN"; | |
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304 InstanceKlass::cast(PENDING_EXCEPTION->klass())-> |
| 0 | 305 name()->as_klass_external_name(klass_name, 256); |
| 306 if (os::exception_name(sig, tmp_sig_name, 16) != NULL) | |
| 307 sig_name = tmp_sig_name; | |
| 308 warning("Exception %s occurred dispatching signal %s to handler" | |
| 309 "- the VM may need to be forcibly terminated", | |
| 310 klass_name, sig_name ); | |
| 311 } | |
| 312 CLEAR_PENDING_EXCEPTION; | |
| 313 } | |
| 314 } | |
| 315 } | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 | |
| 320 void os::signal_init() { | |
| 321 if (!ReduceSignalUsage) { | |
| 322 // Setup JavaThread for processing signals | |
| 323 EXCEPTION_MARK; | |
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324 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
| 0 | 325 instanceKlassHandle klass (THREAD, k); |
| 326 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
| 327 | |
| 328 const char thread_name[] = "Signal Dispatcher"; | |
| 329 Handle string = java_lang_String::create_from_str(thread_name, CHECK); | |
| 330 | |
| 331 // Initialize thread_oop to put it into the system threadGroup | |
| 332 Handle thread_group (THREAD, Universe::system_thread_group()); | |
| 333 JavaValue result(T_VOID); | |
| 334 JavaCalls::call_special(&result, thread_oop, | |
| 335 klass, | |
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336 vmSymbols::object_initializer_name(), |
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337 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 338 thread_group, |
| 339 string, | |
| 340 CHECK); | |
| 341 | |
| 1142 | 342 KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); |
| 0 | 343 JavaCalls::call_special(&result, |
| 344 thread_group, | |
| 345 group, | |
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346 vmSymbols::add_method_name(), |
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347 vmSymbols::thread_void_signature(), |
| 0 | 348 thread_oop, // ARG 1 |
| 349 CHECK); | |
| 350 | |
| 351 os::signal_init_pd(); | |
| 352 | |
| 353 { MutexLocker mu(Threads_lock); | |
| 354 JavaThread* signal_thread = new JavaThread(&signal_thread_entry); | |
| 355 | |
| 356 // At this point it may be possible that no osthread was created for the | |
| 357 // JavaThread due to lack of memory. We would have to throw an exception | |
| 358 // in that case. However, since this must work and we do not allow | |
| 359 // exceptions anyway, check and abort if this fails. | |
| 360 if (signal_thread == NULL || signal_thread->osthread() == NULL) { | |
| 361 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
| 362 "unable to create new native thread"); | |
| 363 } | |
| 364 | |
| 365 java_lang_Thread::set_thread(thread_oop(), signal_thread); | |
| 366 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); | |
| 367 java_lang_Thread::set_daemon(thread_oop()); | |
| 368 | |
| 369 signal_thread->set_threadObj(thread_oop()); | |
| 370 Threads::add(signal_thread); | |
| 371 Thread::start(signal_thread); | |
| 372 } | |
| 373 // Handle ^BREAK | |
| 374 os::signal(SIGBREAK, os::user_handler()); | |
| 375 } | |
| 376 } | |
| 377 | |
| 378 | |
| 379 void os::terminate_signal_thread() { | |
| 380 if (!ReduceSignalUsage) | |
| 381 signal_notify(sigexitnum_pd()); | |
| 382 } | |
| 383 | |
| 384 | |
| 385 // --------------------- loading libraries --------------------- | |
| 386 | |
| 387 typedef jint (JNICALL *JNI_OnLoad_t)(JavaVM *, void *); | |
| 388 extern struct JavaVM_ main_vm; | |
| 389 | |
| 390 static void* _native_java_library = NULL; | |
| 391 | |
| 392 void* os::native_java_library() { | |
| 393 if (_native_java_library == NULL) { | |
| 394 char buffer[JVM_MAXPATHLEN]; | |
| 395 char ebuf[1024]; | |
| 396 | |
| 242 | 397 // Try to load verify dll first. In 1.3 java dll depends on it and is not |
| 398 // always able to find it when the loading executable is outside the JDK. | |
| 0 | 399 // In order to keep working with 1.2 we ignore any loading errors. |
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400 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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401 "verify")) { |
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402 dll_load(buffer, ebuf, sizeof(ebuf)); |
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403 } |
| 0 | 404 |
| 405 // Load java dll | |
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406 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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407 "java")) { |
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408 _native_java_library = dll_load(buffer, ebuf, sizeof(ebuf)); |
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409 } |
| 0 | 410 if (_native_java_library == NULL) { |
| 411 vm_exit_during_initialization("Unable to load native library", ebuf); | |
| 412 } | |
| 3960 | 413 |
| 414 #if defined(__OpenBSD__) | |
| 415 // Work-around OpenBSD's lack of $ORIGIN support by pre-loading libnet.so | |
| 416 // ignore errors | |
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417 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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418 "net")) { |
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419 dll_load(buffer, ebuf, sizeof(ebuf)); |
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420 } |
| 3960 | 421 #endif |
| 242 | 422 } |
| 423 static jboolean onLoaded = JNI_FALSE; | |
| 424 if (onLoaded) { | |
| 425 // We may have to wait to fire OnLoad until TLS is initialized. | |
| 426 if (ThreadLocalStorage::is_initialized()) { | |
| 427 // The JNI_OnLoad handling is normally done by method load in | |
| 428 // java.lang.ClassLoader$NativeLibrary, but the VM loads the base library | |
| 429 // explicitly so we have to check for JNI_OnLoad as well | |
| 430 const char *onLoadSymbols[] = JNI_ONLOAD_SYMBOLS; | |
| 431 JNI_OnLoad_t JNI_OnLoad = CAST_TO_FN_PTR( | |
| 432 JNI_OnLoad_t, dll_lookup(_native_java_library, onLoadSymbols[0])); | |
| 433 if (JNI_OnLoad != NULL) { | |
| 434 JavaThread* thread = JavaThread::current(); | |
| 435 ThreadToNativeFromVM ttn(thread); | |
| 436 HandleMark hm(thread); | |
| 437 jint ver = (*JNI_OnLoad)(&main_vm, NULL); | |
| 438 onLoaded = JNI_TRUE; | |
| 439 if (!Threads::is_supported_jni_version_including_1_1(ver)) { | |
| 440 vm_exit_during_initialization("Unsupported JNI version"); | |
| 441 } | |
| 0 | 442 } |
| 443 } | |
| 444 } | |
| 445 return _native_java_library; | |
| 446 } | |
| 447 | |
| 448 // --------------------- heap allocation utilities --------------------- | |
| 449 | |
| 6197 | 450 char *os::strdup(const char *str, MEMFLAGS flags) { |
| 0 | 451 size_t size = strlen(str); |
| 6197 | 452 char *dup_str = (char *)malloc(size + 1, flags); |
| 0 | 453 if (dup_str == NULL) return NULL; |
| 454 strcpy(dup_str, str); | |
| 455 return dup_str; | |
| 456 } | |
| 457 | |
| 458 | |
| 459 | |
| 460 #ifdef ASSERT | |
| 461 #define space_before (MallocCushion + sizeof(double)) | |
| 462 #define space_after MallocCushion | |
| 463 #define size_addr_from_base(p) (size_t*)(p + space_before - sizeof(size_t)) | |
| 464 #define size_addr_from_obj(p) ((size_t*)p - 1) | |
| 465 // MallocCushion: size of extra cushion allocated around objects with +UseMallocOnly | |
| 466 // NB: cannot be debug variable, because these aren't set from the command line until | |
| 467 // *after* the first few allocs already happened | |
| 468 #define MallocCushion 16 | |
| 469 #else | |
| 470 #define space_before 0 | |
| 471 #define space_after 0 | |
| 472 #define size_addr_from_base(p) should not use w/o ASSERT | |
| 473 #define size_addr_from_obj(p) should not use w/o ASSERT | |
| 474 #define MallocCushion 0 | |
| 475 #endif | |
| 476 #define paranoid 0 /* only set to 1 if you suspect checking code has bug */ | |
| 477 | |
| 478 #ifdef ASSERT | |
| 479 inline size_t get_size(void* obj) { | |
| 480 size_t size = *size_addr_from_obj(obj); | |
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481 if (size < 0) { |
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482 fatal(err_msg("free: size field of object #" PTR_FORMAT " was overwritten (" |
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483 SIZE_FORMAT ")", obj, size)); |
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484 } |
| 0 | 485 return size; |
| 486 } | |
| 487 | |
| 488 u_char* find_cushion_backwards(u_char* start) { | |
| 489 u_char* p = start; | |
| 490 while (p[ 0] != badResourceValue || p[-1] != badResourceValue || | |
| 491 p[-2] != badResourceValue || p[-3] != badResourceValue) p--; | |
| 492 // ok, we have four consecutive marker bytes; find start | |
| 493 u_char* q = p - 4; | |
| 494 while (*q == badResourceValue) q--; | |
| 495 return q + 1; | |
| 496 } | |
| 497 | |
| 498 u_char* find_cushion_forwards(u_char* start) { | |
| 499 u_char* p = start; | |
| 500 while (p[0] != badResourceValue || p[1] != badResourceValue || | |
| 501 p[2] != badResourceValue || p[3] != badResourceValue) p++; | |
| 502 // ok, we have four consecutive marker bytes; find end of cushion | |
| 503 u_char* q = p + 4; | |
| 504 while (*q == badResourceValue) q++; | |
| 505 return q - MallocCushion; | |
| 506 } | |
| 507 | |
| 508 void print_neighbor_blocks(void* ptr) { | |
| 509 // find block allocated before ptr (not entirely crash-proof) | |
| 510 if (MallocCushion < 4) { | |
| 511 tty->print_cr("### cannot find previous block (MallocCushion < 4)"); | |
| 512 return; | |
| 513 } | |
| 514 u_char* start_of_this_block = (u_char*)ptr - space_before; | |
| 515 u_char* end_of_prev_block_data = start_of_this_block - space_after -1; | |
| 516 // look for cushion in front of prev. block | |
| 517 u_char* start_of_prev_block = find_cushion_backwards(end_of_prev_block_data); | |
| 518 ptrdiff_t size = *size_addr_from_base(start_of_prev_block); | |
| 519 u_char* obj = start_of_prev_block + space_before; | |
| 520 if (size <= 0 ) { | |
| 521 // start is bad; mayhave been confused by OS data inbetween objects | |
| 522 // search one more backwards | |
| 523 start_of_prev_block = find_cushion_backwards(start_of_prev_block); | |
| 524 size = *size_addr_from_base(start_of_prev_block); | |
| 525 obj = start_of_prev_block + space_before; | |
| 526 } | |
| 527 | |
| 528 if (start_of_prev_block + space_before + size + space_after == start_of_this_block) { | |
| 2250 | 529 tty->print_cr("### previous object: " PTR_FORMAT " (" SSIZE_FORMAT " bytes)", obj, size); |
| 0 | 530 } else { |
| 2250 | 531 tty->print_cr("### previous object (not sure if correct): " PTR_FORMAT " (" SSIZE_FORMAT " bytes)", obj, size); |
| 0 | 532 } |
| 533 | |
| 534 // now find successor block | |
| 535 u_char* start_of_next_block = (u_char*)ptr + *size_addr_from_obj(ptr) + space_after; | |
| 536 start_of_next_block = find_cushion_forwards(start_of_next_block); | |
| 537 u_char* next_obj = start_of_next_block + space_before; | |
| 538 ptrdiff_t next_size = *size_addr_from_base(start_of_next_block); | |
| 539 if (start_of_next_block[0] == badResourceValue && | |
| 540 start_of_next_block[1] == badResourceValue && | |
| 541 start_of_next_block[2] == badResourceValue && | |
| 542 start_of_next_block[3] == badResourceValue) { | |
| 2250 | 543 tty->print_cr("### next object: " PTR_FORMAT " (" SSIZE_FORMAT " bytes)", next_obj, next_size); |
| 0 | 544 } else { |
| 2250 | 545 tty->print_cr("### next object (not sure if correct): " PTR_FORMAT " (" SSIZE_FORMAT " bytes)", next_obj, next_size); |
| 0 | 546 } |
| 547 } | |
| 548 | |
| 549 | |
| 550 void report_heap_error(void* memblock, void* bad, const char* where) { | |
| 2250 | 551 tty->print_cr("## nof_mallocs = " UINT64_FORMAT ", nof_frees = " UINT64_FORMAT, os::num_mallocs, os::num_frees); |
| 552 tty->print_cr("## memory stomp: byte at " PTR_FORMAT " %s object " PTR_FORMAT, bad, where, memblock); | |
| 0 | 553 print_neighbor_blocks(memblock); |
| 554 fatal("memory stomping error"); | |
| 555 } | |
| 556 | |
| 557 void verify_block(void* memblock) { | |
| 558 size_t size = get_size(memblock); | |
| 559 if (MallocCushion) { | |
| 560 u_char* ptr = (u_char*)memblock - space_before; | |
| 561 for (int i = 0; i < MallocCushion; i++) { | |
| 562 if (ptr[i] != badResourceValue) { | |
| 563 report_heap_error(memblock, ptr+i, "in front of"); | |
| 564 } | |
| 565 } | |
| 566 u_char* end = (u_char*)memblock + size + space_after; | |
| 567 for (int j = -MallocCushion; j < 0; j++) { | |
| 568 if (end[j] != badResourceValue) { | |
| 569 report_heap_error(memblock, end+j, "after"); | |
| 570 } | |
| 571 } | |
| 572 } | |
| 573 } | |
| 574 #endif | |
| 575 | |
| 6197 | 576 void* os::malloc(size_t size, MEMFLAGS memflags, address caller) { |
| 2250 | 577 NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1)); |
| 578 NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size)); | |
| 0 | 579 |
| 580 if (size == 0) { | |
| 581 // return a valid pointer if size is zero | |
| 582 // if NULL is returned the calling functions assume out of memory. | |
| 583 size = 1; | |
| 584 } | |
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585 if (size > size + space_before + space_after) { // Check for rollover. |
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586 return NULL; |
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587 } |
| 0 | 588 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
| 589 u_char* ptr = (u_char*)::malloc(size + space_before + space_after); | |
| 6197 | 590 |
| 0 | 591 #ifdef ASSERT |
| 592 if (ptr == NULL) return NULL; | |
| 593 if (MallocCushion) { | |
| 594 for (u_char* p = ptr; p < ptr + MallocCushion; p++) *p = (u_char)badResourceValue; | |
| 595 u_char* end = ptr + space_before + size; | |
| 596 for (u_char* pq = ptr+MallocCushion; pq < end; pq++) *pq = (u_char)uninitBlockPad; | |
| 597 for (u_char* q = end; q < end + MallocCushion; q++) *q = (u_char)badResourceValue; | |
| 598 } | |
| 599 // put size just before data | |
| 600 *size_addr_from_base(ptr) = size; | |
| 601 #endif | |
| 602 u_char* memblock = ptr + space_before; | |
| 603 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
| 2250 | 604 tty->print_cr("os::malloc caught, " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, memblock); |
| 0 | 605 breakpoint(); |
| 606 } | |
| 607 debug_only(if (paranoid) verify_block(memblock)); | |
| 2250 | 608 if (PrintMalloc && tty != NULL) tty->print_cr("os::malloc " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, memblock); |
| 6197 | 609 |
| 610 // we do not track MallocCushion memory | |
| 611 MemTracker::record_malloc((address)memblock, size, memflags, caller == 0 ? CALLER_PC : caller); | |
| 612 | |
| 0 | 613 return memblock; |
| 614 } | |
| 615 | |
| 616 | |
| 6197 | 617 void* os::realloc(void *memblock, size_t size, MEMFLAGS memflags, address caller) { |
| 0 | 618 #ifndef ASSERT |
| 2250 | 619 NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1)); |
| 620 NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size)); | |
| 6197 | 621 void* ptr = ::realloc(memblock, size); |
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622 if (ptr != NULL) { |
| 6197 | 623 MemTracker::record_realloc((address)memblock, (address)ptr, size, memflags, |
| 624 caller == 0 ? CALLER_PC : caller); | |
| 625 } | |
| 626 return ptr; | |
| 0 | 627 #else |
| 628 if (memblock == NULL) { | |
| 6197 | 629 return malloc(size, memflags, (caller == 0 ? CALLER_PC : caller)); |
| 0 | 630 } |
| 631 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
| 2250 | 632 tty->print_cr("os::realloc caught " PTR_FORMAT, memblock); |
| 0 | 633 breakpoint(); |
| 634 } | |
| 635 verify_block(memblock); | |
| 636 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); | |
| 637 if (size == 0) return NULL; | |
| 638 // always move the block | |
| 6197 | 639 void* ptr = malloc(size, memflags, caller == 0 ? CALLER_PC : caller); |
| 2250 | 640 if (PrintMalloc) tty->print_cr("os::remalloc " SIZE_FORMAT " bytes, " PTR_FORMAT " --> " PTR_FORMAT, size, memblock, ptr); |
| 0 | 641 // Copy to new memory if malloc didn't fail |
| 642 if ( ptr != NULL ) { | |
| 643 memcpy(ptr, memblock, MIN2(size, get_size(memblock))); | |
| 644 if (paranoid) verify_block(ptr); | |
| 645 if ((intptr_t)ptr == (intptr_t)MallocCatchPtr) { | |
| 2250 | 646 tty->print_cr("os::realloc caught, " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
| 0 | 647 breakpoint(); |
| 648 } | |
| 649 free(memblock); | |
| 650 } | |
| 651 return ptr; | |
| 652 #endif | |
| 653 } | |
| 654 | |
| 655 | |
| 6197 | 656 void os::free(void *memblock, MEMFLAGS memflags) { |
| 2250 | 657 NOT_PRODUCT(inc_stat_counter(&num_frees, 1)); |
| 0 | 658 #ifdef ASSERT |
| 659 if (memblock == NULL) return; | |
| 660 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
| 2250 | 661 if (tty != NULL) tty->print_cr("os::free caught " PTR_FORMAT, memblock); |
| 0 | 662 breakpoint(); |
| 663 } | |
| 664 verify_block(memblock); | |
| 665 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); | |
| 666 // Added by detlefs. | |
| 667 if (MallocCushion) { | |
| 668 u_char* ptr = (u_char*)memblock - space_before; | |
| 669 for (u_char* p = ptr; p < ptr + MallocCushion; p++) { | |
| 670 guarantee(*p == badResourceValue, | |
| 671 "Thing freed should be malloc result."); | |
| 672 *p = (u_char)freeBlockPad; | |
| 673 } | |
| 674 size_t size = get_size(memblock); | |
| 2250 | 675 inc_stat_counter(&free_bytes, size); |
| 0 | 676 u_char* end = ptr + space_before + size; |
| 677 for (u_char* q = end; q < end + MallocCushion; q++) { | |
| 678 guarantee(*q == badResourceValue, | |
| 679 "Thing freed should be malloc result."); | |
| 680 *q = (u_char)freeBlockPad; | |
| 681 } | |
| 2250 | 682 if (PrintMalloc && tty != NULL) |
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683 fprintf(stderr, "os::free " SIZE_FORMAT " bytes --> " PTR_FORMAT "\n", size, (uintptr_t)memblock); |
| 2250 | 684 } else if (PrintMalloc && tty != NULL) { |
| 685 // tty->print_cr("os::free %p", memblock); | |
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686 fprintf(stderr, "os::free " PTR_FORMAT "\n", (uintptr_t)memblock); |
| 0 | 687 } |
| 688 #endif | |
| 6197 | 689 MemTracker::record_free((address)memblock, memflags); |
| 690 | |
| 0 | 691 ::free((char*)memblock - space_before); |
| 692 } | |
| 693 | |
| 694 void os::init_random(long initval) { | |
| 695 _rand_seed = initval; | |
| 696 } | |
| 697 | |
| 698 | |
| 699 long os::random() { | |
| 700 /* standard, well-known linear congruential random generator with | |
| 701 * next_rand = (16807*seed) mod (2**31-1) | |
| 702 * see | |
| 703 * (1) "Random Number Generators: Good Ones Are Hard to Find", | |
| 704 * S.K. Park and K.W. Miller, Communications of the ACM 31:10 (Oct 1988), | |
| 705 * (2) "Two Fast Implementations of the 'Minimal Standard' Random | |
| 706 * Number Generator", David G. Carta, Comm. ACM 33, 1 (Jan 1990), pp. 87-88. | |
| 707 */ | |
| 708 const long a = 16807; | |
| 709 const unsigned long m = 2147483647; | |
| 710 const long q = m / a; assert(q == 127773, "weird math"); | |
| 711 const long r = m % a; assert(r == 2836, "weird math"); | |
| 712 | |
| 713 // compute az=2^31p+q | |
| 714 unsigned long lo = a * (long)(_rand_seed & 0xFFFF); | |
| 715 unsigned long hi = a * (long)((unsigned long)_rand_seed >> 16); | |
| 716 lo += (hi & 0x7FFF) << 16; | |
| 717 | |
| 718 // if q overflowed, ignore the overflow and increment q | |
| 719 if (lo > m) { | |
| 720 lo &= m; | |
| 721 ++lo; | |
| 722 } | |
| 723 lo += hi >> 15; | |
| 724 | |
| 725 // if (p+q) overflowed, ignore the overflow and increment (p+q) | |
| 726 if (lo > m) { | |
| 727 lo &= m; | |
| 728 ++lo; | |
| 729 } | |
| 730 return (_rand_seed = lo); | |
| 731 } | |
| 732 | |
| 733 // The INITIALIZED state is distinguished from the SUSPENDED state because the | |
| 734 // conditions in which a thread is first started are different from those in which | |
| 735 // a suspension is resumed. These differences make it hard for us to apply the | |
| 736 // tougher checks when starting threads that we want to do when resuming them. | |
| 737 // However, when start_thread is called as a result of Thread.start, on a Java | |
| 738 // thread, the operation is synchronized on the Java Thread object. So there | |
| 739 // cannot be a race to start the thread and hence for the thread to exit while | |
| 740 // we are working on it. Non-Java threads that start Java threads either have | |
| 741 // to do so in a context in which races are impossible, or should do appropriate | |
| 742 // locking. | |
| 743 | |
| 744 void os::start_thread(Thread* thread) { | |
| 745 // guard suspend/resume | |
| 746 MutexLockerEx ml(thread->SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 747 OSThread* osthread = thread->osthread(); | |
| 748 osthread->set_state(RUNNABLE); | |
| 749 pd_start_thread(thread); | |
| 750 } | |
| 751 | |
| 752 //--------------------------------------------------------------------------- | |
| 753 // Helper functions for fatal error handler | |
| 754 | |
| 755 void os::print_hex_dump(outputStream* st, address start, address end, int unitsize) { | |
| 756 assert(unitsize == 1 || unitsize == 2 || unitsize == 4 || unitsize == 8, "just checking"); | |
| 757 | |
| 758 int cols = 0; | |
| 759 int cols_per_line = 0; | |
| 760 switch (unitsize) { | |
| 761 case 1: cols_per_line = 16; break; | |
| 762 case 2: cols_per_line = 8; break; | |
| 763 case 4: cols_per_line = 4; break; | |
| 764 case 8: cols_per_line = 2; break; | |
| 765 default: return; | |
| 766 } | |
| 767 | |
| 768 address p = start; | |
| 769 st->print(PTR_FORMAT ": ", start); | |
| 770 while (p < end) { | |
| 771 switch (unitsize) { | |
| 772 case 1: st->print("%02x", *(u1*)p); break; | |
| 773 case 2: st->print("%04x", *(u2*)p); break; | |
| 774 case 4: st->print("%08x", *(u4*)p); break; | |
| 775 case 8: st->print("%016" FORMAT64_MODIFIER "x", *(u8*)p); break; | |
| 776 } | |
| 777 p += unitsize; | |
| 778 cols++; | |
| 779 if (cols >= cols_per_line && p < end) { | |
| 780 cols = 0; | |
| 781 st->cr(); | |
| 782 st->print(PTR_FORMAT ": ", p); | |
| 783 } else { | |
| 784 st->print(" "); | |
| 785 } | |
| 786 } | |
| 787 st->cr(); | |
| 788 } | |
| 789 | |
| 790 void os::print_environment_variables(outputStream* st, const char** env_list, | |
| 791 char* buffer, int len) { | |
| 792 if (env_list) { | |
| 793 st->print_cr("Environment Variables:"); | |
| 794 | |
| 795 for (int i = 0; env_list[i] != NULL; i++) { | |
| 796 if (getenv(env_list[i], buffer, len)) { | |
| 797 st->print(env_list[i]); | |
| 798 st->print("="); | |
| 799 st->print_cr(buffer); | |
| 800 } | |
| 801 } | |
| 802 } | |
| 803 } | |
| 804 | |
| 805 void os::print_cpu_info(outputStream* st) { | |
| 806 // cpu | |
| 807 st->print("CPU:"); | |
| 808 st->print("total %d", os::processor_count()); | |
| 809 // It's not safe to query number of active processors after crash | |
| 810 // st->print("(active %d)", os::active_processor_count()); | |
| 811 st->print(" %s", VM_Version::cpu_features()); | |
| 812 st->cr(); | |
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813 pd_print_cpu_info(st); |
| 0 | 814 } |
| 815 | |
| 816 void os::print_date_and_time(outputStream *st) { | |
| 817 time_t tloc; | |
| 818 (void)time(&tloc); | |
| 819 st->print("time: %s", ctime(&tloc)); // ctime adds newline. | |
| 820 | |
| 821 double t = os::elapsedTime(); | |
| 822 // NOTE: It tends to crash after a SEGV if we want to printf("%f",...) in | |
| 823 // Linux. Must be a bug in glibc ? Workaround is to round "t" to int | |
| 824 // before printf. We lost some precision, but who cares? | |
| 825 st->print_cr("elapsed time: %d seconds", (int)t); | |
| 826 } | |
| 827 | |
|
1681
126ea7725993
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bobv
parents:
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diff
changeset
|
828 // moved from debug.cpp (used to be find()) but still called from there |
| 1907 | 829 // The verbose parameter is only set by the debug code in one case |
| 830 void os::print_location(outputStream* st, intptr_t x, bool verbose) { | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
831 address addr = (address)x; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
832 CodeBlob* b = CodeCache::find_blob_unsafe(addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
833 if (b != NULL) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
834 if (b->is_buffer_blob()) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
835 // the interpreter is generated into a buffer blob |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
836 InterpreterCodelet* i = Interpreter::codelet_containing(addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
837 if (i != NULL) { |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
838 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", addr, (int)(addr - i->code_begin())); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
839 i->print_on(st); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
840 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
841 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
842 if (Interpreter::contains(addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
843 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code" |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
844 " (not bytecode specific)", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
845 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
846 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
847 // |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
848 if (AdapterHandlerLibrary::contains(b)) { |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
849 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", addr, (int)(addr - b->code_begin())); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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diff
changeset
|
850 AdapterHandlerLibrary::print_handler_on(st, b); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
851 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
852 // the stubroutines are generated into a buffer blob |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
853 StubCodeDesc* d = StubCodeDesc::desc_for(addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
854 if (d != NULL) { |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
855 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", addr, (int)(addr - d->begin())); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
856 d->print_on(st); |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
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diff
changeset
|
857 st->cr(); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
858 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
859 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
860 if (StubRoutines::contains(addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
861 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) " |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
862 "stub routine", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
863 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
864 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
865 // the InlineCacheBuffer is using stubs generated into a buffer blob |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
866 if (InlineCacheBuffer::contains(addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
867 st->print_cr(INTPTR_FORMAT " is pointing into InlineCacheBuffer", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
868 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
869 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
870 VtableStub* v = VtableStubs::stub_containing(addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
871 if (v != NULL) { |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
872 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", addr, (int)(addr - v->entry_point())); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
873 v->print_on(st); |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
874 st->cr(); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
875 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
876 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
877 } |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
878 nmethod* nm = b->as_nmethod_or_null(); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
879 if (nm != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
880 ResourceMark rm; |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
881 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT, |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
882 addr, (int)(addr - nm->entry_point()), nm); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
883 if (verbose) { |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
884 st->print(" for "); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
885 nm->method()->print_value_on(st); |
|
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
886 } |
|
6816
87ac5c0a404d
8000228: Missing call to cr() when printing entry_point in nmethod, in os::print_location
stefank
parents:
6814
diff
changeset
|
887 st->cr(); |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
888 nm->print_nmethod(verbose); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
889 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
890 } |
|
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
891 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", addr, (int)(addr - b->code_begin())); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
892 b->print_on(st); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
893 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
894 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
895 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
896 if (Universe::heap()->is_in(addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
897 HeapWord* p = Universe::heap()->block_start(addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
898 bool print = false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
899 // If we couldn't find it it just may mean that heap wasn't parseable |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
900 // See if we were just given an oop directly |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
901 if (p != NULL && Universe::heap()->block_is_obj(p)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
902 print = true; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
903 } else if (p == NULL && ((oopDesc*)addr)->is_oop()) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
904 p = (HeapWord*) addr; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
905 print = true; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
906 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
907 if (print) { |
|
6814
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
908 if (p == (HeapWord*) addr) { |
|
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
909 st->print_cr(INTPTR_FORMAT " is an oop", addr); |
|
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
910 } else { |
|
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
911 st->print_cr(INTPTR_FORMAT " is pointing into object: " INTPTR_FORMAT, addr, p); |
|
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
912 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
913 oop(p)->print_on(st); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
914 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
915 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
916 } else { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
917 if (Universe::heap()->is_in_reserved(addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
918 st->print_cr(INTPTR_FORMAT " is an unallocated location " |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
919 "in the heap", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
920 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
921 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
922 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
923 if (JNIHandles::is_global_handle((jobject) addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
924 st->print_cr(INTPTR_FORMAT " is a global jni handle", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
925 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
926 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
927 if (JNIHandles::is_weak_global_handle((jobject) addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
928 st->print_cr(INTPTR_FORMAT " is a weak global jni handle", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
929 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
930 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
931 #ifndef PRODUCT |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
932 // we don't keep the block list in product mode |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
933 if (JNIHandleBlock::any_contains((jobject) addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
934 st->print_cr(INTPTR_FORMAT " is a local jni handle", addr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
935 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
936 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
937 #endif |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
938 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
939 for(JavaThread *thread = Threads::first(); thread; thread = thread->next()) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
940 // Check for privilege stack |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
941 if (thread->privileged_stack_top() != NULL && |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
942 thread->privileged_stack_top()->contains(addr)) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
943 st->print_cr(INTPTR_FORMAT " is pointing into the privilege stack " |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
944 "for thread: " INTPTR_FORMAT, addr, thread); |
| 1907 | 945 if (verbose) thread->print_on(st); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
946 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
947 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
948 // If the addr is a java thread print information about that. |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
949 if (addr == (address)thread) { |
| 1907 | 950 if (verbose) { |
| 951 thread->print_on(st); | |
| 952 } else { | |
| 953 st->print_cr(INTPTR_FORMAT " is a thread", addr); | |
| 954 } | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
955 return; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
956 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
957 // If the addr is in the stack region for this thread then report that |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
958 // and print thread info |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
959 if (thread->stack_base() >= addr && |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
960 addr > (thread->stack_base() - thread->stack_size())) { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
961 st->print_cr(INTPTR_FORMAT " is pointing into the stack for thread: " |
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962 INTPTR_FORMAT, addr, thread); |
| 1907 | 963 if (verbose) thread->print_on(st); |
|
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964 return; |
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965 } |
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966 |
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967 } |
|
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968 |
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969 #ifndef PRODUCT |
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970 // Check if in metaspace. |
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971 if (ClassLoaderDataGraph::contains((address)addr)) { |
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972 // Use addr->print() from the debugger instead (not here) |
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973 st->print_cr(INTPTR_FORMAT |
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974 " is pointing into metadata", addr); |
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975 return; |
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976 } |
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977 #endif |
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978 |
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979 // Try an OS specific find |
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980 if (os::find(addr, st)) { |
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981 return; |
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982 } |
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983 |
| 1907 | 984 st->print_cr(INTPTR_FORMAT " is an unknown value", addr); |
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985 } |
| 0 | 986 |
| 987 // Looks like all platforms except IA64 can use the same function to check | |
| 988 // if C stack is walkable beyond current frame. The check for fp() is not | |
| 989 // necessary on Sparc, but it's harmless. | |
| 990 bool os::is_first_C_frame(frame* fr) { | |
| 991 #ifdef IA64 | |
| 992 // In order to walk native frames on Itanium, we need to access the unwind | |
| 993 // table, which is inside ELF. We don't want to parse ELF after fatal error, | |
| 994 // so return true for IA64. If we need to support C stack walking on IA64, | |
| 995 // this function needs to be moved to CPU specific files, as fp() on IA64 | |
| 996 // is register stack, which grows towards higher memory address. | |
| 997 return true; | |
| 998 #endif | |
| 999 | |
| 1000 // Load up sp, fp, sender sp and sender fp, check for reasonable values. | |
| 1001 // Check usp first, because if that's bad the other accessors may fault | |
| 1002 // on some architectures. Ditto ufp second, etc. | |
| 1003 uintptr_t fp_align_mask = (uintptr_t)(sizeof(address)-1); | |
| 1004 // sp on amd can be 32 bit aligned. | |
| 1005 uintptr_t sp_align_mask = (uintptr_t)(sizeof(int)-1); | |
| 1006 | |
| 1007 uintptr_t usp = (uintptr_t)fr->sp(); | |
| 1008 if ((usp & sp_align_mask) != 0) return true; | |
| 1009 | |
| 1010 uintptr_t ufp = (uintptr_t)fr->fp(); | |
| 1011 if ((ufp & fp_align_mask) != 0) return true; | |
| 1012 | |
| 1013 uintptr_t old_sp = (uintptr_t)fr->sender_sp(); | |
| 1014 if ((old_sp & sp_align_mask) != 0) return true; | |
| 1015 if (old_sp == 0 || old_sp == (uintptr_t)-1) return true; | |
| 1016 | |
| 1017 uintptr_t old_fp = (uintptr_t)fr->link(); | |
| 1018 if ((old_fp & fp_align_mask) != 0) return true; | |
| 1019 if (old_fp == 0 || old_fp == (uintptr_t)-1 || old_fp == ufp) return true; | |
| 1020 | |
| 1021 // stack grows downwards; if old_fp is below current fp or if the stack | |
| 1022 // frame is too large, either the stack is corrupted or fp is not saved | |
| 1023 // on stack (i.e. on x86, ebp may be used as general register). The stack | |
| 1024 // is not walkable beyond current frame. | |
| 1025 if (old_fp < ufp) return true; | |
| 1026 if (old_fp - ufp > 64 * K) return true; | |
| 1027 | |
| 1028 return false; | |
| 1029 } | |
| 1030 | |
| 1031 #ifdef ASSERT | |
| 1032 extern "C" void test_random() { | |
| 1033 const double m = 2147483647; | |
| 1034 double mean = 0.0, variance = 0.0, t; | |
| 1035 long reps = 10000; | |
| 1036 unsigned long seed = 1; | |
| 1037 | |
| 1038 tty->print_cr("seed %ld for %ld repeats...", seed, reps); | |
| 1039 os::init_random(seed); | |
| 1040 long num; | |
| 1041 for (int k = 0; k < reps; k++) { | |
| 1042 num = os::random(); | |
| 1043 double u = (double)num / m; | |
| 1044 assert(u >= 0.0 && u <= 1.0, "bad random number!"); | |
| 1045 | |
| 1046 // calculate mean and variance of the random sequence | |
| 1047 mean += u; | |
| 1048 variance += (u*u); | |
| 1049 } | |
| 1050 mean /= reps; | |
| 1051 variance /= (reps - 1); | |
| 1052 | |
| 1053 assert(num == 1043618065, "bad seed"); | |
| 1054 tty->print_cr("mean of the 1st 10000 numbers: %f", mean); | |
| 1055 tty->print_cr("variance of the 1st 10000 numbers: %f", variance); | |
| 1056 const double eps = 0.0001; | |
| 1057 t = fabsd(mean - 0.5018); | |
| 1058 assert(t < eps, "bad mean"); | |
| 1059 t = (variance - 0.3355) < 0.0 ? -(variance - 0.3355) : variance - 0.3355; | |
| 1060 assert(t < eps, "bad variance"); | |
| 1061 } | |
| 1062 #endif | |
| 1063 | |
| 1064 | |
| 1065 // Set up the boot classpath. | |
| 1066 | |
| 1067 char* os::format_boot_path(const char* format_string, | |
| 1068 const char* home, | |
| 1069 int home_len, | |
| 1070 char fileSep, | |
| 1071 char pathSep) { | |
| 1072 assert((fileSep == '/' && pathSep == ':') || | |
| 1073 (fileSep == '\\' && pathSep == ';'), "unexpected seperator chars"); | |
| 1074 | |
| 1075 // Scan the format string to determine the length of the actual | |
| 1076 // boot classpath, and handle platform dependencies as well. | |
| 1077 int formatted_path_len = 0; | |
| 1078 const char* p; | |
| 1079 for (p = format_string; *p != 0; ++p) { | |
| 1080 if (*p == '%') formatted_path_len += home_len - 1; | |
| 1081 ++formatted_path_len; | |
| 1082 } | |
| 1083 | |
| 6197 | 1084 char* formatted_path = NEW_C_HEAP_ARRAY(char, formatted_path_len + 1, mtInternal); |
| 0 | 1085 if (formatted_path == NULL) { |
| 1086 return NULL; | |
| 1087 } | |
| 1088 | |
| 1089 // Create boot classpath from format, substituting separator chars and | |
| 1090 // java home directory. | |
| 1091 char* q = formatted_path; | |
| 1092 for (p = format_string; *p != 0; ++p) { | |
| 1093 switch (*p) { | |
| 1094 case '%': | |
| 1095 strcpy(q, home); | |
| 1096 q += home_len; | |
| 1097 break; | |
| 1098 case '/': | |
| 1099 *q++ = fileSep; | |
| 1100 break; | |
| 1101 case ':': | |
| 1102 *q++ = pathSep; | |
| 1103 break; | |
| 1104 default: | |
| 1105 *q++ = *p; | |
| 1106 } | |
| 1107 } | |
| 1108 *q = '\0'; | |
| 1109 | |
| 1110 assert((q - formatted_path) == formatted_path_len, "formatted_path size botched"); | |
| 1111 return formatted_path; | |
| 1112 } | |
| 1113 | |
| 1114 | |
| 1115 bool os::set_boot_path(char fileSep, char pathSep) { | |
| 1116 const char* home = Arguments::get_java_home(); | |
| 1117 int home_len = (int)strlen(home); | |
| 1118 | |
| 1119 static const char* meta_index_dir_format = "%/lib/"; | |
| 1120 static const char* meta_index_format = "%/lib/meta-index"; | |
| 1121 char* meta_index = format_boot_path(meta_index_format, home, home_len, fileSep, pathSep); | |
| 1122 if (meta_index == NULL) return false; | |
| 1123 char* meta_index_dir = format_boot_path(meta_index_dir_format, home, home_len, fileSep, pathSep); | |
| 1124 if (meta_index_dir == NULL) return false; | |
| 1125 Arguments::set_meta_index_path(meta_index, meta_index_dir); | |
| 1126 | |
| 1127 // Any modification to the JAR-file list, for the boot classpath must be | |
| 1128 // aligned with install/install/make/common/Pack.gmk. Note: boot class | |
| 1129 // path class JARs, are stripped for StackMapTable to reduce download size. | |
| 1130 static const char classpath_format[] = | |
| 1131 "%/lib/resources.jar:" | |
| 1132 "%/lib/rt.jar:" | |
| 1133 "%/lib/sunrsasign.jar:" | |
| 1134 "%/lib/jsse.jar:" | |
| 1135 "%/lib/jce.jar:" | |
| 1136 "%/lib/charsets.jar:" | |
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1137 "%/lib/jfr.jar:" |
| 4006 | 1138 #ifdef __APPLE__ |
| 1139 "%/lib/JObjC.jar:" | |
| 1140 #endif | |
| 0 | 1141 "%/classes"; |
| 1142 char* sysclasspath = format_boot_path(classpath_format, home, home_len, fileSep, pathSep); | |
| 1143 if (sysclasspath == NULL) return false; | |
| 1144 Arguments::set_sysclasspath(sysclasspath); | |
| 1145 | |
| 1146 return true; | |
| 1147 } | |
| 1148 | |
| 691 | 1149 /* |
| 1150 * Splits a path, based on its separator, the number of | |
| 1151 * elements is returned back in n. | |
| 1152 * It is the callers responsibility to: | |
| 1153 * a> check the value of n, and n may be 0. | |
| 1154 * b> ignore any empty path elements | |
| 1155 * c> free up the data. | |
| 1156 */ | |
| 1157 char** os::split_path(const char* path, int* n) { | |
| 1158 *n = 0; | |
| 1159 if (path == NULL || strlen(path) == 0) { | |
| 1160 return NULL; | |
| 1161 } | |
| 1162 const char psepchar = *os::path_separator(); | |
| 6197 | 1163 char* inpath = (char*)NEW_C_HEAP_ARRAY(char, strlen(path) + 1, mtInternal); |
| 691 | 1164 if (inpath == NULL) { |
| 1165 return NULL; | |
| 1166 } | |
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1167 strcpy(inpath, path); |
| 691 | 1168 int count = 1; |
| 1169 char* p = strchr(inpath, psepchar); | |
| 1170 // Get a count of elements to allocate memory | |
| 1171 while (p != NULL) { | |
| 1172 count++; | |
| 1173 p++; | |
| 1174 p = strchr(p, psepchar); | |
| 1175 } | |
| 6197 | 1176 char** opath = (char**) NEW_C_HEAP_ARRAY(char*, count, mtInternal); |
| 691 | 1177 if (opath == NULL) { |
| 1178 return NULL; | |
| 1179 } | |
| 1180 | |
| 1181 // do the actual splitting | |
| 1182 p = inpath; | |
| 1183 for (int i = 0 ; i < count ; i++) { | |
| 1184 size_t len = strcspn(p, os::path_separator()); | |
| 1185 if (len > JVM_MAXPATHLEN) { | |
| 1186 return NULL; | |
| 1187 } | |
| 1188 // allocate the string and add terminator storage | |
| 6197 | 1189 char* s = (char*)NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
| 691 | 1190 if (s == NULL) { |
| 1191 return NULL; | |
| 1192 } | |
| 1193 strncpy(s, p, len); | |
| 1194 s[len] = '\0'; | |
| 1195 opath[i] = s; | |
| 1196 p += len + 1; | |
| 1197 } | |
| 6197 | 1198 FREE_C_HEAP_ARRAY(char, inpath, mtInternal); |
| 691 | 1199 *n = count; |
| 1200 return opath; | |
| 1201 } | |
| 1202 | |
| 0 | 1203 void os::set_memory_serialize_page(address page) { |
| 1204 int count = log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); | |
| 1205 _mem_serialize_page = (volatile int32_t *)page; | |
| 1206 // We initialize the serialization page shift count here | |
| 1207 // We assume a cache line size of 64 bytes | |
| 1208 assert(SerializePageShiftCount == count, | |
| 1209 "thread size changed, fix SerializePageShiftCount constant"); | |
| 1210 set_serialize_page_mask((uintptr_t)(vm_page_size() - sizeof(int32_t))); | |
| 1211 } | |
| 1212 | |
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1213 static volatile intptr_t SerializePageLock = 0; |
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1214 |
| 0 | 1215 // This method is called from signal handler when SIGSEGV occurs while the current |
| 1216 // thread tries to store to the "read-only" memory serialize page during state | |
| 1217 // transition. | |
| 1218 void os::block_on_serialize_page_trap() { | |
| 1219 if (TraceSafepoint) { | |
| 1220 tty->print_cr("Block until the serialize page permission restored"); | |
| 1221 } | |
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1222 // When VMThread is holding the SerializePageLock during modifying the |
| 0 | 1223 // access permission of the memory serialize page, the following call |
| 1224 // will block until the permission of that page is restored to rw. | |
| 1225 // Generally, it is unsafe to manipulate locks in signal handlers, but in | |
| 1226 // this case, it's OK as the signal is synchronous and we know precisely when | |
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1227 // it can occur. |
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1228 Thread::muxAcquire(&SerializePageLock, "set_memory_serialize_page"); |
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1229 Thread::muxRelease(&SerializePageLock); |
| 0 | 1230 } |
| 1231 | |
| 1232 // Serialize all thread state variables | |
| 1233 void os::serialize_thread_states() { | |
| 1234 // On some platforms such as Solaris & Linux, the time duration of the page | |
| 1235 // permission restoration is observed to be much longer than expected due to | |
| 1236 // scheduler starvation problem etc. To avoid the long synchronization | |
|
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1237 // time and expensive page trap spinning, 'SerializePageLock' is used to block |
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1238 // the mutator thread if such case is encountered. See bug 6546278 for details. |
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1239 Thread::muxAcquire(&SerializePageLock, "serialize_thread_states"); |
|
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1240 os::protect_memory((char *)os::get_memory_serialize_page(), |
|
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1241 os::vm_page_size(), MEM_PROT_READ); |
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1242 os::protect_memory((char *)os::get_memory_serialize_page(), |
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1243 os::vm_page_size(), MEM_PROT_RW); |
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1244 Thread::muxRelease(&SerializePageLock); |
| 0 | 1245 } |
| 1246 | |
| 1247 // Returns true if the current stack pointer is above the stack shadow | |
| 1248 // pages, false otherwise. | |
| 1249 | |
| 1250 bool os::stack_shadow_pages_available(Thread *thread, methodHandle method) { | |
| 1251 assert(StackRedPages > 0 && StackYellowPages > 0,"Sanity check"); | |
| 1252 address sp = current_stack_pointer(); | |
| 1253 // Check if we have StackShadowPages above the yellow zone. This parameter | |
| 605 | 1254 // is dependent on the depth of the maximum VM call stack possible from |
| 0 | 1255 // the handler for stack overflow. 'instanceof' in the stack overflow |
| 1256 // handler or a println uses at least 8k stack of VM and native code | |
| 1257 // respectively. | |
| 1258 const int framesize_in_bytes = | |
| 1259 Interpreter::size_top_interpreter_activation(method()) * wordSize; | |
| 1260 int reserved_area = ((StackShadowPages + StackRedPages + StackYellowPages) | |
| 1261 * vm_page_size()) + framesize_in_bytes; | |
| 1262 // The very lower end of the stack | |
| 1263 address stack_limit = thread->stack_base() - thread->stack_size(); | |
| 1264 return (sp > (stack_limit + reserved_area)); | |
| 1265 } | |
| 1266 | |
| 1267 size_t os::page_size_for_region(size_t region_min_size, size_t region_max_size, | |
| 1268 uint min_pages) | |
| 1269 { | |
| 1270 assert(min_pages > 0, "sanity"); | |
| 1271 if (UseLargePages) { | |
| 1272 const size_t max_page_size = region_max_size / min_pages; | |
| 1273 | |
| 1274 for (unsigned int i = 0; _page_sizes[i] != 0; ++i) { | |
| 1275 const size_t sz = _page_sizes[i]; | |
| 1276 const size_t mask = sz - 1; | |
| 1277 if ((region_min_size & mask) == 0 && (region_max_size & mask) == 0) { | |
| 1278 // The largest page size with no fragmentation. | |
| 1279 return sz; | |
| 1280 } | |
| 1281 | |
| 1282 if (sz <= max_page_size) { | |
| 1283 // The largest page size that satisfies the min_pages requirement. | |
| 1284 return sz; | |
| 1285 } | |
| 1286 } | |
| 1287 } | |
| 1288 | |
| 1289 return vm_page_size(); | |
| 1290 } | |
| 1291 | |
| 1292 #ifndef PRODUCT | |
| 3859 | 1293 void os::trace_page_sizes(const char* str, const size_t* page_sizes, int count) |
| 1294 { | |
| 1295 if (TracePageSizes) { | |
| 1296 tty->print("%s: ", str); | |
| 1297 for (int i = 0; i < count; ++i) { | |
| 1298 tty->print(" " SIZE_FORMAT, page_sizes[i]); | |
| 1299 } | |
| 1300 tty->cr(); | |
| 1301 } | |
| 1302 } | |
| 1303 | |
| 0 | 1304 void os::trace_page_sizes(const char* str, const size_t region_min_size, |
| 1305 const size_t region_max_size, const size_t page_size, | |
| 1306 const char* base, const size_t size) | |
| 1307 { | |
| 1308 if (TracePageSizes) { | |
| 1309 tty->print_cr("%s: min=" SIZE_FORMAT " max=" SIZE_FORMAT | |
| 1310 " pg_sz=" SIZE_FORMAT " base=" PTR_FORMAT | |
| 1311 " size=" SIZE_FORMAT, | |
| 1312 str, region_min_size, region_max_size, | |
| 1313 page_size, base, size); | |
| 1314 } | |
| 1315 } | |
| 1316 #endif // #ifndef PRODUCT | |
| 1317 | |
| 1318 // This is the working definition of a server class machine: | |
| 1319 // >= 2 physical CPU's and >=2GB of memory, with some fuzz | |
| 1320 // because the graphics memory (?) sometimes masks physical memory. | |
| 1321 // If you want to change the definition of a server class machine | |
| 1322 // on some OS or platform, e.g., >=4GB on Windohs platforms, | |
| 1323 // then you'll have to parameterize this method based on that state, | |
| 1324 // as was done for logical processors here, or replicate and | |
| 1325 // specialize this method for each platform. (Or fix os to have | |
| 1326 // some inheritance structure and use subclassing. Sigh.) | |
| 1327 // If you want some platform to always or never behave as a server | |
| 1328 // class machine, change the setting of AlwaysActAsServerClassMachine | |
| 1329 // and NeverActAsServerClassMachine in globals*.hpp. | |
| 1330 bool os::is_server_class_machine() { | |
| 1331 // First check for the early returns | |
| 1332 if (NeverActAsServerClassMachine) { | |
| 1333 return false; | |
| 1334 } | |
| 1335 if (AlwaysActAsServerClassMachine) { | |
| 1336 return true; | |
| 1337 } | |
| 1338 // Then actually look at the machine | |
| 1339 bool result = false; | |
| 1340 const unsigned int server_processors = 2; | |
| 1341 const julong server_memory = 2UL * G; | |
| 1342 // We seem not to get our full complement of memory. | |
| 1343 // We allow some part (1/8?) of the memory to be "missing", | |
| 1344 // based on the sizes of DIMMs, and maybe graphics cards. | |
| 1345 const julong missing_memory = 256UL * M; | |
| 1346 | |
| 1347 /* Is this a server class machine? */ | |
| 1348 if ((os::active_processor_count() >= (int)server_processors) && | |
| 1349 (os::physical_memory() >= (server_memory - missing_memory))) { | |
| 1350 const unsigned int logical_processors = | |
| 1351 VM_Version::logical_processors_per_package(); | |
| 1352 if (logical_processors > 1) { | |
| 1353 const unsigned int physical_packages = | |
| 1354 os::active_processor_count() / logical_processors; | |
| 1355 if (physical_packages > server_processors) { | |
| 1356 result = true; | |
| 1357 } | |
| 1358 } else { | |
| 1359 result = true; | |
| 1360 } | |
| 1361 } | |
| 1362 return result; | |
| 1363 } | |
|
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1364 |
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1365 // Read file line by line, if line is longer than bsize, |
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1366 // skip rest of line. |
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1367 int os::get_line_chars(int fd, char* buf, const size_t bsize){ |
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1368 size_t sz, i = 0; |
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1369 |
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1370 // read until EOF, EOL or buf is full |
| 3832 | 1371 while ((sz = (int) read(fd, &buf[i], 1)) == 1 && i < (bsize-2) && buf[i] != '\n') { |
|
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1372 ++i; |
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1373 } |
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1374 |
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1375 if (buf[i] == '\n') { |
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1376 // EOL reached so ignore EOL character and return |
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1377 |
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1378 buf[i] = 0; |
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1379 return (int) i; |
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1380 } |
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1381 |
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1382 buf[i+1] = 0; |
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1383 |
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1384 if (sz != 1) { |
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1385 // EOF reached. if we read chars before EOF return them and |
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1386 // return EOF on next call otherwise return EOF |
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1387 |
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1388 return (i == 0) ? -1 : (int) i; |
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1389 } |
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1390 |
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1391 // line is longer than size of buf, skip to EOL |
| 3832 | 1392 char ch; |
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1393 while (read(fd, &ch, 1) == 1 && ch != '\n') { |
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1394 // Do nothing |
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1395 } |
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1396 |
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1397 // return initial part of line that fits in buf. |
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1398 // If we reached EOF, it will be returned on next call. |
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1399 |
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1400 return (int) i; |
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1401 } |
| 6197 | 1402 |
| 1403 bool os::create_stack_guard_pages(char* addr, size_t bytes) { | |
| 1404 return os::pd_create_stack_guard_pages(addr, bytes); | |
| 1405 } | |
| 1406 | |
| 1407 | |
| 1408 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { | |
| 1409 char* result = pd_reserve_memory(bytes, addr, alignment_hint); | |
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1410 if (result != NULL) { |
| 6197 | 1411 MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC); |
| 1412 } | |
| 1413 | |
| 1414 return result; | |
| 1415 } | |
| 1416 char* os::attempt_reserve_memory_at(size_t bytes, char* addr) { | |
| 1417 char* result = pd_attempt_reserve_memory_at(bytes, addr); | |
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1418 if (result != NULL) { |
| 6197 | 1419 MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC); |
| 1420 } | |
| 1421 return result; | |
| 1422 } | |
| 1423 | |
| 1424 void os::split_reserved_memory(char *base, size_t size, | |
| 1425 size_t split, bool realloc) { | |
| 1426 pd_split_reserved_memory(base, size, split, realloc); | |
| 1427 } | |
| 1428 | |
| 1429 bool os::commit_memory(char* addr, size_t bytes, bool executable) { | |
| 1430 bool res = pd_commit_memory(addr, bytes, executable); | |
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1431 if (res) { |
| 6197 | 1432 MemTracker::record_virtual_memory_commit((address)addr, bytes, CALLER_PC); |
| 1433 } | |
| 1434 return res; | |
| 1435 } | |
| 1436 | |
| 1437 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, | |
| 1438 bool executable) { | |
| 1439 bool res = os::pd_commit_memory(addr, size, alignment_hint, executable); | |
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1440 if (res) { |
| 6197 | 1441 MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC); |
| 1442 } | |
| 1443 return res; | |
| 1444 } | |
| 1445 | |
| 1446 bool os::uncommit_memory(char* addr, size_t bytes) { | |
| 1447 bool res = pd_uncommit_memory(addr, bytes); | |
| 1448 if (res) { | |
| 1449 MemTracker::record_virtual_memory_uncommit((address)addr, bytes); | |
| 1450 } | |
| 1451 return res; | |
| 1452 } | |
| 1453 | |
| 1454 bool os::release_memory(char* addr, size_t bytes) { | |
| 1455 bool res = pd_release_memory(addr, bytes); | |
| 1456 if (res) { | |
| 1457 MemTracker::record_virtual_memory_release((address)addr, bytes); | |
| 1458 } | |
| 1459 return res; | |
| 1460 } | |
| 1461 | |
| 1462 | |
| 1463 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
| 1464 char *addr, size_t bytes, bool read_only, | |
| 1465 bool allow_exec) { | |
| 1466 char* result = pd_map_memory(fd, file_name, file_offset, addr, bytes, read_only, allow_exec); | |
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1467 if (result != NULL) { |
| 6197 | 1468 MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC); |
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1469 MemTracker::record_virtual_memory_commit((address)result, bytes, CALLER_PC); |
| 6197 | 1470 } |
| 1471 return result; | |
| 1472 } | |
| 1473 | |
| 1474 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 1475 char *addr, size_t bytes, bool read_only, | |
| 1476 bool allow_exec) { | |
| 1477 return pd_remap_memory(fd, file_name, file_offset, addr, bytes, | |
| 1478 read_only, allow_exec); | |
| 1479 } | |
| 1480 | |
| 1481 bool os::unmap_memory(char *addr, size_t bytes) { | |
| 1482 bool result = pd_unmap_memory(addr, bytes); | |
| 1483 if (result) { | |
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1484 MemTracker::record_virtual_memory_uncommit((address)addr, bytes); |
| 6197 | 1485 MemTracker::record_virtual_memory_release((address)addr, bytes); |
| 1486 } | |
| 1487 return result; | |
| 1488 } | |
| 1489 | |
| 1490 void os::free_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
| 1491 pd_free_memory(addr, bytes, alignment_hint); | |
| 1492 } | |
| 1493 | |
| 1494 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
| 1495 pd_realign_memory(addr, bytes, alignment_hint); | |
| 1496 } | |
| 1497 |