Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/os.hpp @ 18096:ca6d25be853b jdk8u25-b13
8044269: Analysis of archive files.
Summary: Add checksum verification.
Reviewed-by: iklam, dholmes, mschoene
| author | jiangli |
|---|---|
| date | Tue, 12 Aug 2014 17:46:16 -0400 |
| parents | f73af4455d7d |
| children | 52b4284cb496 833b0f92429a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 17567 | 2 * Copyright (c) 1997, 2014, 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 #ifndef SHARE_VM_RUNTIME_OS_HPP |
| 26 #define SHARE_VM_RUNTIME_OS_HPP | |
| 27 | |
| 28 #include "jvmtifiles/jvmti.h" | |
| 29 #include "runtime/atomic.hpp" | |
| 30 #include "runtime/extendedPC.hpp" | |
| 31 #include "runtime/handles.hpp" | |
| 32 #include "utilities/top.hpp" | |
| 33 #ifdef TARGET_OS_FAMILY_linux | |
| 34 # include "jvm_linux.h" | |
| 11151 | 35 # include <setjmp.h> |
| 1972 | 36 #endif |
| 37 #ifdef TARGET_OS_FAMILY_solaris | |
| 38 # include "jvm_solaris.h" | |
| 11151 | 39 # include <setjmp.h> |
| 1972 | 40 #endif |
| 41 #ifdef TARGET_OS_FAMILY_windows | |
| 42 # include "jvm_windows.h" | |
| 43 #endif | |
| 14411 | 44 #ifdef TARGET_OS_FAMILY_aix |
| 45 # include "jvm_aix.h" | |
| 46 # include <setjmp.h> | |
| 47 #endif | |
| 3960 | 48 #ifdef TARGET_OS_FAMILY_bsd |
| 49 # include "jvm_bsd.h" | |
| 11151 | 50 # include <setjmp.h> |
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51 # ifdef __APPLE__ |
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52 # include <mach/mach_time.h> |
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53 # endif |
| 3960 | 54 #endif |
| 1972 | 55 |
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56 class AgentLibrary; |
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57 |
| 0 | 58 // os defines the interface to operating system; this includes traditional |
| 59 // OS services (time, I/O) as well as other functionality with system- | |
| 60 // dependent code. | |
| 61 | |
| 62 typedef void (*dll_func)(...); | |
| 63 | |
| 64 class Thread; | |
| 65 class JavaThread; | |
| 66 class Event; | |
| 67 class DLL; | |
| 68 class FileHandle; | |
| 141 | 69 template<class E> class GrowableArray; |
| 0 | 70 |
| 71 // %%%%% Moved ThreadState, START_FN, OSThread to new osThread.hpp. -- Rose | |
| 72 | |
| 73 // Platform-independent error return values from OS functions | |
| 74 enum OSReturn { | |
| 75 OS_OK = 0, // Operation was successful | |
| 76 OS_ERR = -1, // Operation failed | |
| 77 OS_INTRPT = -2, // Operation was interrupted | |
| 78 OS_TIMEOUT = -3, // Operation timed out | |
| 79 OS_NOMEM = -5, // Operation failed for lack of memory | |
| 80 OS_NORESOURCE = -6 // Operation failed for lack of nonmemory resource | |
| 81 }; | |
| 82 | |
| 83 enum ThreadPriority { // JLS 20.20.1-3 | |
| 84 NoPriority = -1, // Initial non-priority value | |
| 85 MinPriority = 1, // Minimum priority | |
| 86 NormPriority = 5, // Normal (non-daemon) priority | |
| 87 NearMaxPriority = 9, // High priority, used for VMThread | |
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88 MaxPriority = 10, // Highest priority, used for WatcherThread |
| 0 | 89 // ensures that VMThread doesn't starve profiler |
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90 CriticalPriority = 11 // Critical thread priority |
| 0 | 91 }; |
| 92 | |
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93 // Executable parameter flag for os::commit_memory() and |
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94 // os::commit_memory_or_exit(). |
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95 const bool ExecMem = true; |
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96 |
| 0 | 97 // Typedef for structured exception handling support |
| 98 typedef void (*java_call_t)(JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
| 99 | |
| 100 class os: AllStatic { | |
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101 friend class VMStructs; |
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102 |
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103 public: |
| 0 | 104 enum { page_sizes_max = 9 }; // Size of _page_sizes array (8 plus a sentinel) |
| 105 | |
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106 private: |
| 0 | 107 static OSThread* _starting_thread; |
| 108 static address _polling_page; | |
| 109 static volatile int32_t * _mem_serialize_page; | |
| 110 static uintptr_t _serialize_page_mask; | |
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111 public: |
| 0 | 112 static size_t _page_sizes[page_sizes_max]; |
| 113 | |
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114 private: |
| 0 | 115 static void init_page_sizes(size_t default_page_size) { |
| 116 _page_sizes[0] = default_page_size; | |
| 117 _page_sizes[1] = 0; // sentinel | |
| 118 } | |
| 119 | |
| 6197 | 120 static char* pd_reserve_memory(size_t bytes, char* addr = 0, |
| 121 size_t alignment_hint = 0); | |
| 122 static char* pd_attempt_reserve_memory_at(size_t bytes, char* addr); | |
| 123 static void pd_split_reserved_memory(char *base, size_t size, | |
| 124 size_t split, bool realloc); | |
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125 static bool pd_commit_memory(char* addr, size_t bytes, bool executable); |
| 6197 | 126 static bool pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
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127 bool executable); |
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128 // Same as pd_commit_memory() that either succeeds or calls |
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129 // vm_exit_out_of_memory() with the specified mesg. |
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130 static void pd_commit_memory_or_exit(char* addr, size_t bytes, |
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131 bool executable, const char* mesg); |
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132 static void pd_commit_memory_or_exit(char* addr, size_t size, |
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133 size_t alignment_hint, |
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134 bool executable, const char* mesg); |
| 6197 | 135 static bool pd_uncommit_memory(char* addr, size_t bytes); |
| 136 static bool pd_release_memory(char* addr, size_t bytes); | |
| 137 | |
| 138 static char* pd_map_memory(int fd, const char* file_name, size_t file_offset, | |
| 139 char *addr, size_t bytes, bool read_only = false, | |
| 140 bool allow_exec = false); | |
| 141 static char* pd_remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 142 char *addr, size_t bytes, bool read_only, | |
| 143 bool allow_exec); | |
| 144 static bool pd_unmap_memory(char *addr, size_t bytes); | |
| 145 static void pd_free_memory(char *addr, size_t bytes, size_t alignment_hint); | |
| 146 static void pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint); | |
| 147 | |
| 148 | |
| 0 | 149 public: |
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150 static void init(void); // Called before command line parsing |
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151 static void init_before_ergo(void); // Called after command line parsing |
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152 // before VM ergonomics processing. |
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153 static jint init_2(void); // Called after command line parsing |
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154 // and VM ergonomics processing |
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155 static void init_globals(void) { // Called from init_globals() in init.cpp |
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156 init_globals_ext(); |
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157 } |
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158 static void init_3(void); // Called at the end of vm init |
| 0 | 159 |
| 160 // File names are case-insensitive on windows only | |
| 161 // Override me as needed | |
| 162 static int file_name_strcmp(const char* s1, const char* s2); | |
| 163 | |
| 164 static bool getenv(const char* name, char* buffer, int len); | |
| 165 static bool have_special_privileges(); | |
| 166 | |
| 167 static jlong javaTimeMillis(); | |
| 168 static jlong javaTimeNanos(); | |
| 169 static void javaTimeNanos_info(jvmtiTimerInfo *info_ptr); | |
| 170 static void run_periodic_checks(); | |
| 171 | |
| 172 | |
| 173 // Returns the elapsed time in seconds since the vm started. | |
| 174 static double elapsedTime(); | |
| 175 | |
| 176 // Returns real time in seconds since an arbitrary point | |
| 177 // in the past. | |
| 178 static bool getTimesSecs(double* process_real_time, | |
| 179 double* process_user_time, | |
| 180 double* process_system_time); | |
| 181 | |
| 182 // Interface to the performance counter | |
| 183 static jlong elapsed_counter(); | |
| 184 static jlong elapsed_frequency(); | |
| 185 | |
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186 // The "virtual time" of a thread is the amount of time a thread has |
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187 // actually run. The first function indicates whether the OS supports |
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188 // this functionality for the current thread, and if so: |
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189 // * the second enables vtime tracking (if that is required). |
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190 // * the third tells whether vtime is enabled. |
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191 // * the fourth returns the elapsed virtual time for the current |
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192 // thread. |
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193 static bool supports_vtime(); |
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194 static bool enable_vtime(); |
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195 static bool vtime_enabled(); |
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196 static double elapsedVTime(); |
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197 |
| 0 | 198 // Return current local time in a string (YYYY-MM-DD HH:MM:SS). |
| 199 // It is MT safe, but not async-safe, as reading time zone | |
| 200 // information may require a lock on some platforms. | |
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201 static char* local_time_string(char *buf, size_t buflen); |
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202 static struct tm* localtime_pd (const time_t* clock, struct tm* res); |
| 0 | 203 // Fill in buffer with current local time as an ISO-8601 string. |
| 204 // E.g., YYYY-MM-DDThh:mm:ss.mmm+zzzz. | |
| 205 // Returns buffer, or NULL if it failed. | |
| 206 static char* iso8601_time(char* buffer, size_t buffer_length); | |
| 207 | |
| 208 // Interface for detecting multiprocessor system | |
| 209 static inline bool is_MP() { | |
| 210 assert(_processor_count > 0, "invalid processor count"); | |
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211 return _processor_count > 1 || AssumeMP; |
| 0 | 212 } |
| 213 static julong available_memory(); | |
| 214 static julong physical_memory(); | |
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215 static bool has_allocatable_memory_limit(julong* limit); |
| 0 | 216 static bool is_server_class_machine(); |
| 217 | |
| 218 // number of CPUs | |
| 219 static int processor_count() { | |
| 220 return _processor_count; | |
| 221 } | |
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222 static void set_processor_count(int count) { _processor_count = count; } |
| 0 | 223 |
| 224 // Returns the number of CPUs this process is currently allowed to run on. | |
| 225 // Note that on some OSes this can change dynamically. | |
| 226 static int active_processor_count(); | |
| 227 | |
| 228 // Bind processes to processors. | |
| 229 // This is a two step procedure: | |
| 230 // first you generate a distribution of processes to processors, | |
| 231 // then you bind processes according to that distribution. | |
| 232 // Compute a distribution for number of processes to processors. | |
| 233 // Stores the processor id's into the distribution array argument. | |
| 234 // Returns true if it worked, false if it didn't. | |
| 235 static bool distribute_processes(uint length, uint* distribution); | |
| 236 // Binds the current process to a processor. | |
| 237 // Returns true if it worked, false if it didn't. | |
| 238 static bool bind_to_processor(uint processor_id); | |
| 239 | |
| 4006 | 240 // Give a name to the current thread. |
| 241 static void set_native_thread_name(const char *name); | |
| 242 | |
| 0 | 243 // Interface for stack banging (predetect possible stack overflow for |
| 244 // exception processing) There are guard pages, and above that shadow | |
| 245 // pages for stack overflow checking. | |
| 246 static bool uses_stack_guard_pages(); | |
| 247 static bool allocate_stack_guard_pages(); | |
| 248 static void bang_stack_shadow_pages(); | |
| 249 static bool stack_shadow_pages_available(Thread *thread, methodHandle method); | |
| 250 | |
| 251 // OS interface to Virtual Memory | |
| 252 | |
| 253 // Return the default page size. | |
| 254 static int vm_page_size(); | |
| 255 | |
| 256 // Return the page size to use for a region of memory. The min_pages argument | |
| 257 // is a hint intended to limit fragmentation; it says the returned page size | |
| 258 // should be <= region_max_size / min_pages. Because min_pages is a hint, | |
| 259 // this routine may return a size larger than region_max_size / min_pages. | |
| 260 // | |
| 261 // The current implementation ignores min_pages if a larger page size is an | |
| 262 // exact multiple of both region_min_size and region_max_size. This allows | |
| 263 // larger pages to be used when doing so would not cause fragmentation; in | |
| 264 // particular, a single page can be used when region_min_size == | |
| 265 // region_max_size == a supported page size. | |
| 266 static size_t page_size_for_region(size_t region_min_size, | |
| 267 size_t region_max_size, | |
| 268 uint min_pages); | |
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269 // Return the largest page size that can be used |
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270 static size_t max_page_size() { |
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271 // The _page_sizes array is sorted in descending order. |
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272 return _page_sizes[0]; |
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273 } |
| 0 | 274 |
| 3859 | 275 // Methods for tracing page sizes returned by the above method; enabled by |
| 0 | 276 // TracePageSizes. The region_{min,max}_size parameters should be the values |
| 277 // passed to page_size_for_region() and page_size should be the result of that | |
| 278 // call. The (optional) base and size parameters should come from the | |
| 279 // ReservedSpace base() and size() methods. | |
| 3859 | 280 static void trace_page_sizes(const char* str, const size_t* page_sizes, |
| 281 int count) PRODUCT_RETURN; | |
| 0 | 282 static void trace_page_sizes(const char* str, const size_t region_min_size, |
| 283 const size_t region_max_size, | |
| 284 const size_t page_size, | |
| 285 const char* base = NULL, | |
| 286 const size_t size = 0) PRODUCT_RETURN; | |
| 287 | |
| 288 static int vm_allocation_granularity(); | |
| 289 static char* reserve_memory(size_t bytes, char* addr = 0, | |
| 290 size_t alignment_hint = 0); | |
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291 static char* reserve_memory(size_t bytes, char* addr, |
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292 size_t alignment_hint, MEMFLAGS flags); |
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293 static char* reserve_memory_aligned(size_t size, size_t alignment); |
| 0 | 294 static char* attempt_reserve_memory_at(size_t bytes, char* addr); |
| 295 static void split_reserved_memory(char *base, size_t size, | |
| 296 size_t split, bool realloc); | |
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297 static bool commit_memory(char* addr, size_t bytes, bool executable); |
| 656 | 298 static bool commit_memory(char* addr, size_t size, size_t alignment_hint, |
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299 bool executable); |
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300 // Same as commit_memory() that either succeeds or calls |
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301 // vm_exit_out_of_memory() with the specified mesg. |
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302 static void commit_memory_or_exit(char* addr, size_t bytes, |
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303 bool executable, const char* mesg); |
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304 static void commit_memory_or_exit(char* addr, size_t size, |
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305 size_t alignment_hint, |
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306 bool executable, const char* mesg); |
| 0 | 307 static bool uncommit_memory(char* addr, size_t bytes); |
| 308 static bool release_memory(char* addr, size_t bytes); | |
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309 |
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310 enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX }; |
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311 static bool protect_memory(char* addr, size_t bytes, ProtType prot, |
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312 bool is_committed = true); |
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313 |
| 0 | 314 static bool guard_memory(char* addr, size_t bytes); |
| 315 static bool unguard_memory(char* addr, size_t bytes); | |
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316 static bool create_stack_guard_pages(char* addr, size_t bytes); |
| 6197 | 317 static bool pd_create_stack_guard_pages(char* addr, size_t bytes); |
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318 static bool remove_stack_guard_pages(char* addr, size_t bytes); |
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319 |
| 0 | 320 static char* map_memory(int fd, const char* file_name, size_t file_offset, |
| 321 char *addr, size_t bytes, bool read_only = false, | |
| 322 bool allow_exec = false); | |
| 323 static char* remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 324 char *addr, size_t bytes, bool read_only, | |
| 325 bool allow_exec); | |
| 326 static bool unmap_memory(char *addr, size_t bytes); | |
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327 static void free_memory(char *addr, size_t bytes, size_t alignment_hint); |
| 0 | 328 static void realign_memory(char *addr, size_t bytes, size_t alignment_hint); |
| 329 | |
| 330 // NUMA-specific interface | |
| 141 | 331 static bool numa_has_static_binding(); |
| 332 static bool numa_has_group_homing(); | |
| 333 static void numa_make_local(char *addr, size_t bytes, int lgrp_hint); | |
| 0 | 334 static void numa_make_global(char *addr, size_t bytes); |
| 335 static size_t numa_get_groups_num(); | |
| 336 static size_t numa_get_leaf_groups(int *ids, size_t size); | |
| 337 static bool numa_topology_changed(); | |
| 338 static int numa_get_group_id(); | |
| 339 | |
| 340 // Page manipulation | |
| 341 struct page_info { | |
| 342 size_t size; | |
| 343 int lgrp_id; | |
| 344 }; | |
| 345 static bool get_page_info(char *start, page_info* info); | |
| 346 static char* scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found); | |
| 347 | |
| 348 static char* non_memory_address_word(); | |
| 349 // reserve, commit and pin the entire memory region | |
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350 static char* reserve_memory_special(size_t size, size_t alignment, |
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351 char* addr, bool executable); |
| 0 | 352 static bool release_memory_special(char* addr, size_t bytes); |
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353 static void large_page_init(); |
| 0 | 354 static size_t large_page_size(); |
| 355 static bool can_commit_large_page_memory(); | |
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356 static bool can_execute_large_page_memory(); |
| 0 | 357 |
| 358 // OS interface to polling page | |
| 359 static address get_polling_page() { return _polling_page; } | |
| 360 static void set_polling_page(address page) { _polling_page = page; } | |
| 361 static bool is_poll_address(address addr) { return addr >= _polling_page && addr < (_polling_page + os::vm_page_size()); } | |
| 362 static void make_polling_page_unreadable(); | |
| 363 static void make_polling_page_readable(); | |
| 364 | |
| 365 // Routines used to serialize the thread state without using membars | |
| 366 static void serialize_thread_states(); | |
| 367 | |
| 368 // Since we write to the serialize page from every thread, we | |
| 369 // want stores to be on unique cache lines whenever possible | |
| 370 // in order to minimize CPU cross talk. We pre-compute the | |
| 371 // amount to shift the thread* to make this offset unique to | |
| 372 // each thread. | |
| 373 static int get_serialize_page_shift_count() { | |
| 374 return SerializePageShiftCount; | |
| 375 } | |
| 376 | |
| 377 static void set_serialize_page_mask(uintptr_t mask) { | |
| 378 _serialize_page_mask = mask; | |
| 379 } | |
| 380 | |
| 381 static unsigned int get_serialize_page_mask() { | |
| 382 return _serialize_page_mask; | |
| 383 } | |
| 384 | |
| 385 static void set_memory_serialize_page(address page); | |
| 386 | |
| 387 static address get_memory_serialize_page() { | |
| 388 return (address)_mem_serialize_page; | |
| 389 } | |
| 390 | |
| 391 static inline void write_memory_serialize_page(JavaThread *thread) { | |
| 392 uintptr_t page_offset = ((uintptr_t)thread >> | |
| 393 get_serialize_page_shift_count()) & | |
| 394 get_serialize_page_mask(); | |
| 395 *(volatile int32_t *)((uintptr_t)_mem_serialize_page+page_offset) = 1; | |
| 396 } | |
| 397 | |
| 398 static bool is_memory_serialize_page(JavaThread *thread, address addr) { | |
| 399 if (UseMembar) return false; | |
| 1078 | 400 // Previously this function calculated the exact address of this |
| 401 // thread's serialize page, and checked if the faulting address | |
| 402 // was equal. However, some platforms mask off faulting addresses | |
| 403 // to the page size, so now we just check that the address is | |
| 404 // within the page. This makes the thread argument unnecessary, | |
| 405 // but we retain the NULL check to preserve existing behaviour. | |
| 0 | 406 if (thread == NULL) return false; |
| 1078 | 407 address page = (address) _mem_serialize_page; |
| 408 return addr >= page && addr < (page + os::vm_page_size()); | |
| 0 | 409 } |
| 410 | |
| 411 static void block_on_serialize_page_trap(); | |
| 412 | |
| 413 // threads | |
| 414 | |
| 415 enum ThreadType { | |
| 416 vm_thread, | |
| 417 cgc_thread, // Concurrent GC thread | |
| 418 pgc_thread, // Parallel GC thread | |
| 419 java_thread, | |
| 420 compiler_thread, | |
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421 watcher_thread, |
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422 os_thread |
| 0 | 423 }; |
| 424 | |
| 425 static bool create_thread(Thread* thread, | |
| 426 ThreadType thr_type, | |
| 427 size_t stack_size = 0); | |
| 428 static bool create_main_thread(JavaThread* thread); | |
| 429 static bool create_attached_thread(JavaThread* thread); | |
| 430 static void pd_start_thread(Thread* thread); | |
| 431 static void start_thread(Thread* thread); | |
| 432 | |
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433 static void initialize_thread(Thread* thr); |
| 0 | 434 static void free_thread(OSThread* osthread); |
| 435 | |
| 436 // thread id on Linux/64bit is 64bit, on Windows and Solaris, it's 32bit | |
| 437 static intx current_thread_id(); | |
| 438 static int current_process_id(); | |
| 439 static int sleep(Thread* thread, jlong ms, bool interruptable); | |
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440 // Short standalone OS sleep suitable for slow path spin loop. |
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441 // Ignores Thread.interrupt() (so keep it short). |
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442 // ms = 0, will sleep for the least amount of time allowed by the OS. |
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443 static void naked_short_sleep(jlong ms); |
| 0 | 444 static void infinite_sleep(); // never returns, use with CAUTION |
| 445 static void yield(); // Yields to all threads with same priority | |
| 446 enum YieldResult { | |
| 447 YIELD_SWITCHED = 1, // caller descheduled, other ready threads exist & ran | |
| 448 YIELD_NONEREADY = 0, // No other runnable/ready threads. | |
| 449 // platform-specific yield return immediately | |
| 450 YIELD_UNKNOWN = -1 // Unknown: platform doesn't support _SWITCHED or _NONEREADY | |
| 451 // YIELD_SWITCHED and YIELD_NONREADY imply the platform supports a "strong" | |
| 452 // yield that can be used in lieu of blocking. | |
| 453 } ; | |
| 454 static YieldResult NakedYield () ; | |
| 455 static void yield_all(int attempts = 0); // Yields to all other threads including lower priority | |
| 456 static void loop_breaker(int attempts); // called from within tight loops to possibly influence time-sharing | |
| 457 static OSReturn set_priority(Thread* thread, ThreadPriority priority); | |
| 458 static OSReturn get_priority(const Thread* const thread, ThreadPriority& priority); | |
| 459 | |
| 460 static void interrupt(Thread* thread); | |
| 461 static bool is_interrupted(Thread* thread, bool clear_interrupted); | |
| 462 | |
| 463 static int pd_self_suspend_thread(Thread* thread); | |
| 464 | |
| 465 static ExtendedPC fetch_frame_from_context(void* ucVoid, intptr_t** sp, intptr_t** fp); | |
| 466 static frame fetch_frame_from_context(void* ucVoid); | |
| 467 | |
| 468 static ExtendedPC get_thread_pc(Thread *thread); | |
| 469 static void breakpoint(); | |
| 470 | |
| 471 static address current_stack_pointer(); | |
| 472 static address current_stack_base(); | |
| 473 static size_t current_stack_size(); | |
| 474 | |
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475 static void verify_stack_alignment() PRODUCT_RETURN; |
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476 |
| 0 | 477 static int message_box(const char* title, const char* message); |
| 478 static char* do_you_want_to_debug(const char* message); | |
| 479 | |
| 480 // run cmd in a separate process and return its exit code; or -1 on failures | |
| 481 static int fork_and_exec(char *cmd); | |
| 482 | |
| 483 // os::exit() is merged with vm_exit() | |
| 484 // static void exit(int num); | |
| 485 | |
| 486 // Terminate the VM, but don't exit the process | |
| 487 static void shutdown(); | |
| 488 | |
| 489 // Terminate with an error. Default is to generate a core file on platforms | |
| 490 // that support such things. This calls shutdown() and then aborts. | |
| 491 static void abort(bool dump_core = true); | |
| 492 | |
| 493 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 494 static void die(); | |
| 495 | |
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496 // File i/o operations |
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497 static const int default_file_open_flags(); |
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498 static int open(const char *path, int oflag, int mode); |
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499 static FILE* open(int fd, const char* mode); |
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500 static int close(int fd); |
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501 static jlong lseek(int fd, jlong offset, int whence); |
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502 static char* native_path(char *path); |
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503 static int ftruncate(int fd, jlong length); |
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504 static int fsync(int fd); |
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505 static int available(int fd, jlong *bytes); |
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506 |
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507 //File i/o operations |
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508 |
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509 static size_t read(int fd, void *buf, unsigned int nBytes); |
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510 static size_t restartable_read(int fd, void *buf, unsigned int nBytes); |
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511 static size_t write(int fd, const void *buf, unsigned int nBytes); |
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512 |
| 0 | 513 // Reading directories. |
| 514 static DIR* opendir(const char* dirname); | |
| 515 static int readdir_buf_size(const char *path); | |
| 516 static struct dirent* readdir(DIR* dirp, dirent* dbuf); | |
| 517 static int closedir(DIR* dirp); | |
| 518 | |
| 519 // Dynamic library extension | |
| 520 static const char* dll_file_extension(); | |
| 521 | |
| 522 static const char* get_temp_directory(); | |
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523 static const char* get_current_directory(char *buf, size_t buflen); |
| 0 | 524 |
| 242 | 525 // Builds a platform-specific full library path given a ld path and lib name |
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526 // Returns true if buffer contains full path to existing file, false otherwise |
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527 static bool dll_build_name(char* buffer, size_t size, |
| 242 | 528 const char* pathname, const char* fname); |
| 529 | |
| 0 | 530 // Symbol lookup, find nearest function name; basically it implements |
| 531 // dladdr() for all platforms. Name of the nearest function is copied | |
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532 // to buf. Distance from its base address is optionally returned as offset. |
| 0 | 533 // If function name is not found, buf[0] is set to '\0' and offset is |
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534 // set to -1 (if offset is non-NULL). |
| 0 | 535 static bool dll_address_to_function_name(address addr, char* buf, |
| 536 int buflen, int* offset); | |
| 537 | |
| 538 // Locate DLL/DSO. On success, full path of the library is copied to | |
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539 // buf, and offset is optionally set to be the distance between addr |
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540 // and the library's base address. On failure, buf[0] is set to '\0' |
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541 // and offset is set to -1 (if offset is non-NULL). |
| 0 | 542 static bool dll_address_to_library_name(address addr, char* buf, |
| 543 int buflen, int* offset); | |
| 544 | |
| 545 // Find out whether the pc is in the static code for jvm.dll/libjvm.so. | |
| 546 static bool address_is_in_vm(address addr); | |
| 547 | |
| 548 // Loads .dll/.so and | |
| 549 // in case of error it checks if .dll/.so was built for the | |
| 550 // same architecture as Hotspot is running on | |
| 551 static void* dll_load(const char *name, char *ebuf, int ebuflen); | |
| 552 | |
| 242 | 553 // lookup symbol in a shared library |
| 554 static void* dll_lookup(void* handle, const char* name); | |
| 555 | |
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556 // Unload library |
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557 static void dll_unload(void *lib); |
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558 |
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559 // Return the handle of this process |
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560 static void* get_default_process_handle(); |
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561 |
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562 // Check for static linked agent library |
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563 static bool find_builtin_agent(AgentLibrary *agent_lib, const char *syms[], |
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564 size_t syms_len); |
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565 |
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566 // Find agent entry point |
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567 static void *find_agent_function(AgentLibrary *agent_lib, bool check_lib, |
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568 const char *syms[], size_t syms_len); |
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569 |
| 0 | 570 // Print out system information; they are called by fatal error handler. |
| 571 // Output format may be different on different platforms. | |
| 572 static void print_os_info(outputStream* st); | |
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573 static void print_os_info_brief(outputStream* st); |
| 0 | 574 static void print_cpu_info(outputStream* st); |
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575 static void pd_print_cpu_info(outputStream* st); |
| 0 | 576 static void print_memory_info(outputStream* st); |
| 577 static void print_dll_info(outputStream* st); | |
| 578 static void print_environment_variables(outputStream* st, const char** env_list, char* buffer, int len); | |
| 579 static void print_context(outputStream* st, void* context); | |
| 1907 | 580 static void print_register_info(outputStream* st, void* context); |
| 0 | 581 static void print_siginfo(outputStream* st, void* siginfo); |
| 582 static void print_signal_handlers(outputStream* st, char* buf, size_t buflen); | |
| 583 static void print_date_and_time(outputStream* st); | |
| 584 | |
| 1907 | 585 static void print_location(outputStream* st, intptr_t x, bool verbose = false); |
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586 static size_t lasterror(char *buf, size_t len); |
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587 static int get_last_error(); |
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588 |
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589 // Determines whether the calling process is being debugged by a user-mode debugger. |
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590 static bool is_debugger_attached(); |
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591 |
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592 // wait for a key press if PauseAtExit is set |
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593 static void wait_for_keypress_at_exit(void); |
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594 |
| 0 | 595 // The following two functions are used by fatal error handler to trace |
| 596 // native (C) frames. They are not part of frame.hpp/frame.cpp because | |
| 597 // frame.hpp/cpp assume thread is JavaThread, and also because different | |
| 598 // OS/compiler may have different convention or provide different API to | |
| 599 // walk C frames. | |
| 600 // | |
| 601 // We don't attempt to become a debugger, so we only follow frames if that | |
| 602 // does not require a lookup in the unwind table, which is part of the binary | |
| 603 // file but may be unsafe to read after a fatal error. So on x86, we can | |
| 604 // only walk stack if %ebp is used as frame pointer; on ia64, it's not | |
| 605 // possible to walk C stack without having the unwind table. | |
| 606 static bool is_first_C_frame(frame *fr); | |
| 607 static frame get_sender_for_C_frame(frame *fr); | |
| 608 | |
| 609 // return current frame. pc() and sp() are set to NULL on failure. | |
| 610 static frame current_frame(); | |
| 611 | |
| 612 static void print_hex_dump(outputStream* st, address start, address end, int unitsize); | |
| 613 | |
| 614 // returns a string to describe the exception/signal; | |
| 615 // returns NULL if exception_code is not an OS exception/signal. | |
| 616 static const char* exception_name(int exception_code, char* buf, size_t buflen); | |
| 617 | |
| 618 // Returns native Java library, loads if necessary | |
| 619 static void* native_java_library(); | |
| 620 | |
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621 // Fills in path to jvm.dll/libjvm.so (used by the Disassembler) |
| 0 | 622 static void jvm_path(char *buf, jint buflen); |
| 623 | |
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624 // Returns true if we are running in a headless jre. |
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625 static bool is_headless_jre(); |
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626 |
| 0 | 627 // JNI names |
| 628 static void print_jni_name_prefix_on(outputStream* st, int args_size); | |
| 629 static void print_jni_name_suffix_on(outputStream* st, int args_size); | |
| 630 | |
| 631 // File conventions | |
| 632 static const char* file_separator(); | |
| 633 static const char* line_separator(); | |
| 634 static const char* path_separator(); | |
| 635 | |
| 636 // Init os specific system properties values | |
| 637 static void init_system_properties_values(); | |
| 638 | |
| 639 // IO operations, non-JVM_ version. | |
| 640 static int stat(const char* path, struct stat* sbuf); | |
| 641 static bool dir_is_empty(const char* path); | |
| 642 | |
| 643 // IO operations on binary files | |
| 644 static int create_binary_file(const char* path, bool rewrite_existing); | |
| 645 static jlong current_file_offset(int fd); | |
| 646 static jlong seek_to_file_offset(int fd, jlong offset); | |
| 647 | |
| 648 // Thread Local Storage | |
| 649 static int allocate_thread_local_storage(); | |
| 650 static void thread_local_storage_at_put(int index, void* value); | |
| 651 static void* thread_local_storage_at(int index); | |
| 652 static void free_thread_local_storage(int index); | |
| 653 | |
| 6197 | 654 // Stack walk |
| 655 static address get_caller_pc(int n = 0); | |
| 656 | |
| 0 | 657 // General allocation (must be MT-safe) |
| 6197 | 658 static void* malloc (size_t size, MEMFLAGS flags, address caller_pc = 0); |
| 659 static void* realloc (void *memblock, size_t size, MEMFLAGS flags, address caller_pc = 0); | |
| 660 static void free (void *memblock, MEMFLAGS flags = mtNone); | |
| 0 | 661 static bool check_heap(bool force = false); // verify C heap integrity |
| 6197 | 662 static char* strdup(const char *, MEMFLAGS flags = mtInternal); // Like strdup |
| 0 | 663 |
| 664 #ifndef PRODUCT | |
| 2250 | 665 static julong num_mallocs; // # of calls to malloc/realloc |
| 666 static julong alloc_bytes; // # of bytes allocated | |
| 667 static julong num_frees; // # of calls to free | |
| 668 static julong free_bytes; // # of bytes freed | |
| 0 | 669 #endif |
| 670 | |
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671 // SocketInterface (ex HPI SocketInterface ) |
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672 static int socket(int domain, int type, int protocol); |
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673 static int socket_close(int fd); |
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674 static int socket_shutdown(int fd, int howto); |
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675 static int recv(int fd, char* buf, size_t nBytes, uint flags); |
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676 static int send(int fd, char* buf, size_t nBytes, uint flags); |
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677 static int raw_send(int fd, char* buf, size_t nBytes, uint flags); |
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678 static int timeout(int fd, long timeout); |
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679 static int listen(int fd, int count); |
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680 static int connect(int fd, struct sockaddr* him, socklen_t len); |
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681 static int bind(int fd, struct sockaddr* him, socklen_t len); |
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682 static int accept(int fd, struct sockaddr* him, socklen_t* len); |
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683 static int recvfrom(int fd, char* buf, size_t nbytes, uint flags, |
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684 struct sockaddr* from, socklen_t* fromlen); |
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685 static int get_sock_name(int fd, struct sockaddr* him, socklen_t* len); |
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686 static int sendto(int fd, char* buf, size_t len, uint flags, |
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687 struct sockaddr* to, socklen_t tolen); |
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688 static int socket_available(int fd, jint* pbytes); |
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689 |
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690 static int get_sock_opt(int fd, int level, int optname, |
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691 char* optval, socklen_t* optlen); |
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692 static int set_sock_opt(int fd, int level, int optname, |
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693 const char* optval, socklen_t optlen); |
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694 static int get_host_name(char* name, int namelen); |
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695 |
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696 static struct hostent* get_host_by_name(char* name); |
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697 |
| 0 | 698 // Support for signals (see JVM_RaiseSignal, JVM_RegisterSignal) |
| 699 static void signal_init(); | |
| 700 static void signal_init_pd(); | |
| 701 static void signal_notify(int signal_number); | |
| 702 static void* signal(int signal_number, void* handler); | |
| 703 static void signal_raise(int signal_number); | |
| 704 static int signal_wait(); | |
| 705 static int signal_lookup(); | |
| 706 static void* user_handler(); | |
| 707 static void terminate_signal_thread(); | |
| 708 static int sigexitnum_pd(); | |
| 709 | |
| 710 // random number generation | |
| 711 static long random(); // return 32bit pseudorandom number | |
| 712 static void init_random(long initval); // initialize random sequence | |
| 713 | |
| 714 // Structured OS Exception support | |
| 715 static void os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread); | |
| 716 | |
|
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717 // On Windows this will create an actual minidump, on Linux/Solaris it will simply check core dump limits |
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718 static void check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize); |
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719 |
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720 // Get the default path to the core file |
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721 // Returns the length of the string |
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722 static int get_core_path(char* buffer, size_t bufferSize); |
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723 |
| 0 | 724 // JVMTI & JVM monitoring and management support |
| 725 // The thread_cpu_time() and current_thread_cpu_time() are only | |
| 726 // supported if is_thread_cpu_time_supported() returns true. | |
| 727 // They are not supported on Solaris T1. | |
| 728 | |
| 729 // Thread CPU Time - return the fast estimate on a platform | |
| 730 // On Solaris - call gethrvtime (fast) - user time only | |
| 731 // On Linux - fast clock_gettime where available - user+sys | |
| 732 // - otherwise: very slow /proc fs - user+sys | |
| 733 // On Windows - GetThreadTimes - user+sys | |
| 734 static jlong current_thread_cpu_time(); | |
| 735 static jlong thread_cpu_time(Thread* t); | |
| 736 | |
| 737 // Thread CPU Time with user_sys_cpu_time parameter. | |
| 738 // | |
| 739 // If user_sys_cpu_time is true, user+sys time is returned. | |
| 740 // Otherwise, only user time is returned | |
| 741 static jlong current_thread_cpu_time(bool user_sys_cpu_time); | |
| 742 static jlong thread_cpu_time(Thread* t, bool user_sys_cpu_time); | |
| 743 | |
| 744 // Return a bunch of info about the timers. | |
| 745 // Note that the returned info for these two functions may be different | |
| 746 // on some platforms | |
| 747 static void current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
| 748 static void thread_cpu_time_info(jvmtiTimerInfo *info_ptr); | |
| 749 | |
| 750 static bool is_thread_cpu_time_supported(); | |
| 751 | |
| 752 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 753 static int loadavg(double loadavg[], int nelem); | |
| 754 | |
| 755 // Hook for os specific jvm options that we don't want to abort on seeing | |
| 756 static bool obsolete_option(const JavaVMOption *option); | |
| 757 | |
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758 // Extensions |
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759 #include "runtime/os_ext.hpp" |
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760 |
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761 public: |
| 11151 | 762 class CrashProtectionCallback : public StackObj { |
| 763 public: | |
| 764 virtual void call() = 0; | |
| 765 }; | |
|
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766 |
| 0 | 767 // Platform dependent stuff |
| 1972 | 768 #ifdef TARGET_OS_FAMILY_linux |
| 769 # include "os_linux.hpp" | |
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770 # include "os_posix.hpp" |
| 1972 | 771 #endif |
| 772 #ifdef TARGET_OS_FAMILY_solaris | |
| 773 # include "os_solaris.hpp" | |
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774 # include "os_posix.hpp" |
| 1972 | 775 #endif |
| 776 #ifdef TARGET_OS_FAMILY_windows | |
| 777 # include "os_windows.hpp" | |
| 778 #endif | |
| 14411 | 779 #ifdef TARGET_OS_FAMILY_aix |
| 780 # include "os_aix.hpp" | |
| 781 # include "os_posix.hpp" | |
| 782 #endif | |
| 3960 | 783 #ifdef TARGET_OS_FAMILY_bsd |
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784 # include "os_posix.hpp" |
| 3960 | 785 # include "os_bsd.hpp" |
| 786 #endif | |
| 1972 | 787 #ifdef TARGET_OS_ARCH_linux_x86 |
| 788 # include "os_linux_x86.hpp" | |
| 789 #endif | |
| 790 #ifdef TARGET_OS_ARCH_linux_sparc | |
| 791 # include "os_linux_sparc.hpp" | |
| 792 #endif | |
| 793 #ifdef TARGET_OS_ARCH_linux_zero | |
| 794 # include "os_linux_zero.hpp" | |
| 795 #endif | |
| 796 #ifdef TARGET_OS_ARCH_solaris_x86 | |
| 797 # include "os_solaris_x86.hpp" | |
| 798 #endif | |
| 799 #ifdef TARGET_OS_ARCH_solaris_sparc | |
| 800 # include "os_solaris_sparc.hpp" | |
| 801 #endif | |
| 802 #ifdef TARGET_OS_ARCH_windows_x86 | |
| 803 # include "os_windows_x86.hpp" | |
| 804 #endif | |
|
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805 #ifdef TARGET_OS_ARCH_linux_arm |
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806 # include "os_linux_arm.hpp" |
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807 #endif |
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808 #ifdef TARGET_OS_ARCH_linux_ppc |
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809 # include "os_linux_ppc.hpp" |
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810 #endif |
| 14411 | 811 #ifdef TARGET_OS_ARCH_aix_ppc |
| 812 # include "os_aix_ppc.hpp" | |
| 813 #endif | |
| 3960 | 814 #ifdef TARGET_OS_ARCH_bsd_x86 |
| 815 # include "os_bsd_x86.hpp" | |
| 816 #endif | |
| 817 #ifdef TARGET_OS_ARCH_bsd_zero | |
| 818 # include "os_bsd_zero.hpp" | |
| 819 #endif | |
| 1972 | 820 |
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821 public: |
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822 #ifndef PLATFORM_PRINT_NATIVE_STACK |
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823 // No platform-specific code for printing the native stack. |
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824 static bool platform_print_native_stack(outputStream* st, void* context, |
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825 char *buf, int buf_size) { |
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826 return false; |
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827 } |
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828 #endif |
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829 |
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830 // debugging support (mostly used by debug.cpp but also fatal error handler) |
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831 static bool find(address pc, outputStream* st = tty); // OS specific function to make sense out of an address |
| 0 | 832 |
| 833 static bool dont_yield(); // when true, JVM_Yield() is nop | |
| 834 static void print_statistics(); | |
| 835 | |
| 836 // Thread priority helpers (implemented in OS-specific part) | |
| 837 static OSReturn set_native_priority(Thread* thread, int native_prio); | |
| 838 static OSReturn get_native_priority(const Thread* const thread, int* priority_ptr); | |
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839 static int java_to_os_priority[CriticalPriority + 1]; |
| 0 | 840 // Hint to the underlying OS that a task switch would not be good. |
| 841 // Void return because it's a hint and can fail. | |
| 842 static void hint_no_preempt(); | |
| 843 | |
| 844 // Used at creation if requested by the diagnostic flag PauseAtStartup. | |
| 845 // Causes the VM to wait until an external stimulus has been applied | |
| 846 // (for Unix, that stimulus is a signal, for Windows, an external | |
| 847 // ResumeThread call) | |
| 848 static void pause(); | |
| 849 | |
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850 // Builds a platform dependent Agent_OnLoad_<libname> function name |
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851 // which is used to find statically linked in agents. |
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852 static char* build_agent_function_name(const char *sym, const char *cname, |
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853 bool is_absolute_path); |
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854 |
| 10405 | 855 class SuspendedThreadTaskContext { |
| 856 public: | |
| 857 SuspendedThreadTaskContext(Thread* thread, void *ucontext) : _thread(thread), _ucontext(ucontext) {} | |
| 858 Thread* thread() const { return _thread; } | |
| 859 void* ucontext() const { return _ucontext; } | |
| 860 private: | |
| 861 Thread* _thread; | |
| 862 void* _ucontext; | |
| 863 }; | |
| 864 | |
| 865 class SuspendedThreadTask { | |
| 866 public: | |
| 867 SuspendedThreadTask(Thread* thread) : _thread(thread), _done(false) {} | |
| 868 virtual ~SuspendedThreadTask() {} | |
| 869 void run(); | |
| 870 bool is_done() { return _done; } | |
| 871 virtual void do_task(const SuspendedThreadTaskContext& context) = 0; | |
| 872 protected: | |
| 873 private: | |
| 874 void internal_do_task(); | |
| 875 Thread* _thread; | |
| 876 bool _done; | |
| 877 }; | |
| 878 | |
| 879 #ifndef TARGET_OS_FAMILY_windows | |
| 880 // Suspend/resume support | |
| 881 // Protocol: | |
| 882 // | |
| 883 // a thread starts in SR_RUNNING | |
| 884 // | |
| 885 // SR_RUNNING can go to | |
| 886 // * SR_SUSPEND_REQUEST when the WatcherThread wants to suspend it | |
| 887 // SR_SUSPEND_REQUEST can go to | |
| 888 // * SR_RUNNING if WatcherThread decides it waited for SR_SUSPENDED too long (timeout) | |
| 889 // * SR_SUSPENDED if the stopped thread receives the signal and switches state | |
| 890 // SR_SUSPENDED can go to | |
| 891 // * SR_WAKEUP_REQUEST when the WatcherThread has done the work and wants to resume | |
| 892 // SR_WAKEUP_REQUEST can go to | |
| 893 // * SR_RUNNING when the stopped thread receives the signal | |
| 894 // * SR_WAKEUP_REQUEST on timeout (resend the signal and try again) | |
| 895 class SuspendResume { | |
| 896 public: | |
| 897 enum State { | |
| 898 SR_RUNNING, | |
| 899 SR_SUSPEND_REQUEST, | |
| 900 SR_SUSPENDED, | |
| 901 SR_WAKEUP_REQUEST | |
| 902 }; | |
| 903 | |
| 904 private: | |
| 905 volatile State _state; | |
| 906 | |
| 907 private: | |
| 908 /* try to switch state from state "from" to state "to" | |
| 909 * returns the state set after the method is complete | |
| 910 */ | |
| 911 State switch_state(State from, State to); | |
| 912 | |
| 913 public: | |
| 914 SuspendResume() : _state(SR_RUNNING) { } | |
| 915 | |
| 916 State state() const { return _state; } | |
| 917 | |
| 918 State request_suspend() { | |
| 919 return switch_state(SR_RUNNING, SR_SUSPEND_REQUEST); | |
| 920 } | |
| 921 | |
| 922 State cancel_suspend() { | |
| 923 return switch_state(SR_SUSPEND_REQUEST, SR_RUNNING); | |
| 924 } | |
| 925 | |
| 926 State suspended() { | |
| 927 return switch_state(SR_SUSPEND_REQUEST, SR_SUSPENDED); | |
| 928 } | |
| 929 | |
| 930 State request_wakeup() { | |
| 931 return switch_state(SR_SUSPENDED, SR_WAKEUP_REQUEST); | |
| 932 } | |
| 933 | |
| 934 State running() { | |
| 935 return switch_state(SR_WAKEUP_REQUEST, SR_RUNNING); | |
| 936 } | |
| 937 | |
| 938 bool is_running() const { | |
| 939 return _state == SR_RUNNING; | |
| 940 } | |
| 941 | |
| 942 bool is_suspend_request() const { | |
| 943 return _state == SR_SUSPEND_REQUEST; | |
| 944 } | |
| 945 | |
| 946 bool is_suspended() const { | |
| 947 return _state == SR_SUSPENDED; | |
| 948 } | |
| 949 }; | |
| 950 #endif | |
| 951 | |
| 952 | |
| 0 | 953 protected: |
| 954 static long _rand_seed; // seed for random number generator | |
| 955 static int _processor_count; // number of processors | |
| 956 | |
| 957 static char* format_boot_path(const char* format_string, | |
| 958 const char* home, | |
| 959 int home_len, | |
| 960 char fileSep, | |
| 961 char pathSep); | |
| 962 static bool set_boot_path(char fileSep, char pathSep); | |
| 691 | 963 static char** split_path(const char* path, int* n); |
| 11151 | 964 |
| 0 | 965 }; |
| 966 | |
| 967 // Note that "PAUSE" is almost always used with synchronization | |
| 968 // so arguably we should provide Atomic::SpinPause() instead | |
| 969 // of the global SpinPause() with C linkage. | |
| 970 // It'd also be eligible for inlining on many platforms. | |
| 971 | |
| 11127 | 972 extern "C" int SpinPause(); |
| 1972 | 973 |
| 974 #endif // SHARE_VM_RUNTIME_OS_HPP |