Mercurial > hg > truffle
annotate src/os/windows/vm/os_windows.cpp @ 877:8c79517a9300
6840305: Discrepancy in system memory details (when 4G or greater) reported by JVM and Windows OS
Summary: GlobalMemoryStatus() does not report correct memory usage when the system has more than 4gb of RAM. GlobalMemoryStatusEx() should be used in place of GlobalMemoryStatus().
Reviewed-by: kamg, coleenp
| author | poonam |
|---|---|
| date | Thu, 16 Jul 2009 18:21:40 -0700 |
| parents | c8152ae3f339 |
| children | aafa4232dfd7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifdef _WIN64 | |
| 26 // Must be at least Windows 2000 or XP to use VectoredExceptions | |
| 27 #define _WIN32_WINNT 0x500 | |
| 28 #endif | |
| 29 | |
| 30 // do not include precompiled header file | |
| 31 # include "incls/_os_windows.cpp.incl" | |
| 32 | |
| 33 #ifdef _DEBUG | |
| 34 #include <crtdbg.h> | |
| 35 #endif | |
| 36 | |
| 37 | |
| 38 #include <windows.h> | |
| 39 #include <sys/types.h> | |
| 40 #include <sys/stat.h> | |
| 41 #include <sys/timeb.h> | |
| 42 #include <objidl.h> | |
| 43 #include <shlobj.h> | |
| 44 | |
| 45 #include <malloc.h> | |
| 46 #include <signal.h> | |
| 47 #include <direct.h> | |
| 48 #include <errno.h> | |
| 49 #include <fcntl.h> | |
| 50 #include <io.h> | |
| 51 #include <process.h> // For _beginthreadex(), _endthreadex() | |
| 52 #include <imagehlp.h> // For os::dll_address_to_function_name | |
| 53 | |
| 54 /* for enumerating dll libraries */ | |
| 55 #include <tlhelp32.h> | |
| 56 #include <vdmdbg.h> | |
| 57 | |
| 58 // for timer info max values which include all bits | |
| 59 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
| 60 | |
| 61 // For DLL loading/load error detection | |
| 62 // Values of PE COFF | |
| 63 #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c | |
| 64 #define IMAGE_FILE_SIGNATURE_LENGTH 4 | |
| 65 | |
| 66 static HANDLE main_process; | |
| 67 static HANDLE main_thread; | |
| 68 static int main_thread_id; | |
| 69 | |
| 70 static FILETIME process_creation_time; | |
| 71 static FILETIME process_exit_time; | |
| 72 static FILETIME process_user_time; | |
| 73 static FILETIME process_kernel_time; | |
| 74 | |
| 75 #ifdef _WIN64 | |
| 76 PVOID topLevelVectoredExceptionHandler = NULL; | |
| 77 #endif | |
| 78 | |
| 79 #ifdef _M_IA64 | |
| 80 #define __CPU__ ia64 | |
| 81 #elif _M_AMD64 | |
| 82 #define __CPU__ amd64 | |
| 83 #else | |
| 84 #define __CPU__ i486 | |
| 85 #endif | |
| 86 | |
| 87 // save DLL module handle, used by GetModuleFileName | |
| 88 | |
| 89 HINSTANCE vm_lib_handle; | |
| 90 static int getLastErrorString(char *buf, size_t len); | |
| 91 | |
| 92 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { | |
| 93 switch (reason) { | |
| 94 case DLL_PROCESS_ATTACH: | |
| 95 vm_lib_handle = hinst; | |
| 96 if(ForceTimeHighResolution) | |
| 97 timeBeginPeriod(1L); | |
| 98 break; | |
| 99 case DLL_PROCESS_DETACH: | |
| 100 if(ForceTimeHighResolution) | |
| 101 timeEndPeriod(1L); | |
| 102 #ifdef _WIN64 | |
| 103 if (topLevelVectoredExceptionHandler != NULL) { | |
| 104 RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler); | |
| 105 topLevelVectoredExceptionHandler = NULL; | |
| 106 } | |
| 107 #endif | |
| 108 break; | |
| 109 default: | |
| 110 break; | |
| 111 } | |
| 112 return true; | |
| 113 } | |
| 114 | |
| 115 static inline double fileTimeAsDouble(FILETIME* time) { | |
| 116 const double high = (double) ((unsigned int) ~0); | |
| 117 const double split = 10000000.0; | |
| 118 double result = (time->dwLowDateTime / split) + | |
| 119 time->dwHighDateTime * (high/split); | |
| 120 return result; | |
| 121 } | |
| 122 | |
| 123 // Implementation of os | |
| 124 | |
| 125 bool os::getenv(const char* name, char* buffer, int len) { | |
| 126 int result = GetEnvironmentVariable(name, buffer, len); | |
| 127 return result > 0 && result < len; | |
| 128 } | |
| 129 | |
| 130 | |
| 131 // No setuid programs under Windows. | |
| 132 bool os::have_special_privileges() { | |
| 133 return false; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 // This method is a periodic task to check for misbehaving JNI applications | |
| 138 // under CheckJNI, we can add any periodic checks here. | |
| 139 // For Windows at the moment does nothing | |
| 140 void os::run_periodic_checks() { | |
| 141 return; | |
| 142 } | |
| 143 | |
| 144 #ifndef _WIN64 | |
| 145 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); | |
| 146 #endif | |
| 147 void os::init_system_properties_values() { | |
| 148 /* sysclasspath, java_home, dll_dir */ | |
| 149 { | |
| 150 char *home_path; | |
| 151 char *dll_path; | |
| 152 char *pslash; | |
| 153 char *bin = "\\bin"; | |
| 154 char home_dir[MAX_PATH]; | |
| 155 | |
| 156 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { | |
| 157 os::jvm_path(home_dir, sizeof(home_dir)); | |
| 158 // Found the full path to jvm[_g].dll. | |
| 159 // Now cut the path to <java_home>/jre if we can. | |
| 160 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ | |
| 161 pslash = strrchr(home_dir, '\\'); | |
| 162 if (pslash != NULL) { | |
| 163 *pslash = '\0'; /* get rid of \{client|server} */ | |
| 164 pslash = strrchr(home_dir, '\\'); | |
| 165 if (pslash != NULL) | |
| 166 *pslash = '\0'; /* get rid of \bin */ | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1); | |
| 171 if (home_path == NULL) | |
| 172 return; | |
| 173 strcpy(home_path, home_dir); | |
| 174 Arguments::set_java_home(home_path); | |
| 175 | |
| 176 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1); | |
| 177 if (dll_path == NULL) | |
| 178 return; | |
| 179 strcpy(dll_path, home_dir); | |
| 180 strcat(dll_path, bin); | |
| 181 Arguments::set_dll_dir(dll_path); | |
| 182 | |
| 183 if (!set_boot_path('\\', ';')) | |
| 184 return; | |
| 185 } | |
| 186 | |
| 187 /* library_path */ | |
| 188 #define EXT_DIR "\\lib\\ext" | |
| 189 #define BIN_DIR "\\bin" | |
| 190 #define PACKAGE_DIR "\\Sun\\Java" | |
| 191 { | |
| 192 /* Win32 library search order (See the documentation for LoadLibrary): | |
| 193 * | |
| 194 * 1. The directory from which application is loaded. | |
| 195 * 2. The current directory | |
| 196 * 3. The system wide Java Extensions directory (Java only) | |
| 197 * 4. System directory (GetSystemDirectory) | |
| 198 * 5. Windows directory (GetWindowsDirectory) | |
| 199 * 6. The PATH environment variable | |
| 200 */ | |
| 201 | |
| 202 char *library_path; | |
| 203 char tmp[MAX_PATH]; | |
| 204 char *path_str = ::getenv("PATH"); | |
| 205 | |
| 206 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + | |
| 207 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10); | |
| 208 | |
| 209 library_path[0] = '\0'; | |
| 210 | |
| 211 GetModuleFileName(NULL, tmp, sizeof(tmp)); | |
| 212 *(strrchr(tmp, '\\')) = '\0'; | |
| 213 strcat(library_path, tmp); | |
| 214 | |
| 215 strcat(library_path, ";."); | |
| 216 | |
| 217 GetWindowsDirectory(tmp, sizeof(tmp)); | |
| 218 strcat(library_path, ";"); | |
| 219 strcat(library_path, tmp); | |
| 220 strcat(library_path, PACKAGE_DIR BIN_DIR); | |
| 221 | |
| 222 GetSystemDirectory(tmp, sizeof(tmp)); | |
| 223 strcat(library_path, ";"); | |
| 224 strcat(library_path, tmp); | |
| 225 | |
| 226 GetWindowsDirectory(tmp, sizeof(tmp)); | |
| 227 strcat(library_path, ";"); | |
| 228 strcat(library_path, tmp); | |
| 229 | |
| 230 if (path_str) { | |
| 231 strcat(library_path, ";"); | |
| 232 strcat(library_path, path_str); | |
| 233 } | |
| 234 | |
| 235 Arguments::set_library_path(library_path); | |
| 236 FREE_C_HEAP_ARRAY(char, library_path); | |
| 237 } | |
| 238 | |
| 239 /* Default extensions directory */ | |
| 240 { | |
| 241 char path[MAX_PATH]; | |
| 242 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; | |
| 243 GetWindowsDirectory(path, MAX_PATH); | |
| 244 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, | |
| 245 path, PACKAGE_DIR, EXT_DIR); | |
| 246 Arguments::set_ext_dirs(buf); | |
| 247 } | |
| 248 #undef EXT_DIR | |
| 249 #undef BIN_DIR | |
| 250 #undef PACKAGE_DIR | |
| 251 | |
| 252 /* Default endorsed standards directory. */ | |
| 253 { | |
| 254 #define ENDORSED_DIR "\\lib\\endorsed" | |
| 255 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); | |
| 256 char * buf = NEW_C_HEAP_ARRAY(char, len); | |
| 257 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); | |
| 258 Arguments::set_endorsed_dirs(buf); | |
| 259 #undef ENDORSED_DIR | |
| 260 } | |
| 261 | |
| 262 #ifndef _WIN64 | |
| 263 SetUnhandledExceptionFilter(Handle_FLT_Exception); | |
| 264 #endif | |
| 265 | |
| 266 // Done | |
| 267 return; | |
| 268 } | |
| 269 | |
| 270 void os::breakpoint() { | |
| 271 DebugBreak(); | |
| 272 } | |
| 273 | |
| 274 // Invoked from the BREAKPOINT Macro | |
| 275 extern "C" void breakpoint() { | |
| 276 os::breakpoint(); | |
| 277 } | |
| 278 | |
| 279 // Returns an estimate of the current stack pointer. Result must be guaranteed | |
| 280 // to point into the calling threads stack, and be no lower than the current | |
| 281 // stack pointer. | |
| 282 | |
| 283 address os::current_stack_pointer() { | |
| 284 int dummy; | |
| 285 address sp = (address)&dummy; | |
| 286 return sp; | |
| 287 } | |
| 288 | |
| 289 // os::current_stack_base() | |
| 290 // | |
| 291 // Returns the base of the stack, which is the stack's | |
| 292 // starting address. This function must be called | |
| 293 // while running on the stack of the thread being queried. | |
| 294 | |
| 295 address os::current_stack_base() { | |
| 296 MEMORY_BASIC_INFORMATION minfo; | |
| 297 address stack_bottom; | |
| 298 size_t stack_size; | |
| 299 | |
| 300 VirtualQuery(&minfo, &minfo, sizeof(minfo)); | |
| 301 stack_bottom = (address)minfo.AllocationBase; | |
| 302 stack_size = minfo.RegionSize; | |
| 303 | |
| 304 // Add up the sizes of all the regions with the same | |
| 305 // AllocationBase. | |
| 306 while( 1 ) | |
| 307 { | |
| 308 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); | |
| 309 if ( stack_bottom == (address)minfo.AllocationBase ) | |
| 310 stack_size += minfo.RegionSize; | |
| 311 else | |
| 312 break; | |
| 313 } | |
| 314 | |
| 315 #ifdef _M_IA64 | |
| 316 // IA64 has memory and register stacks | |
| 317 stack_size = stack_size / 2; | |
| 318 #endif | |
| 319 return stack_bottom + stack_size; | |
| 320 } | |
| 321 | |
| 322 size_t os::current_stack_size() { | |
| 323 size_t sz; | |
| 324 MEMORY_BASIC_INFORMATION minfo; | |
| 325 VirtualQuery(&minfo, &minfo, sizeof(minfo)); | |
| 326 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; | |
| 327 return sz; | |
| 328 } | |
| 329 | |
|
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330 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
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331 const struct tm* time_struct_ptr = localtime(clock); |
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332 if (time_struct_ptr != NULL) { |
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333 *res = *time_struct_ptr; |
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334 return res; |
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335 } |
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336 return NULL; |
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337 } |
| 0 | 338 |
| 339 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); | |
| 340 | |
| 341 // Thread start routine for all new Java threads | |
| 342 static unsigned __stdcall java_start(Thread* thread) { | |
| 343 // Try to randomize the cache line index of hot stack frames. | |
| 344 // This helps when threads of the same stack traces evict each other's | |
| 345 // cache lines. The threads can be either from the same JVM instance, or | |
| 346 // from different JVM instances. The benefit is especially true for | |
| 347 // processors with hyperthreading technology. | |
| 348 static int counter = 0; | |
| 349 int pid = os::current_process_id(); | |
| 350 _alloca(((pid ^ counter++) & 7) * 128); | |
| 351 | |
| 352 OSThread* osthr = thread->osthread(); | |
| 353 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); | |
| 354 | |
| 355 if (UseNUMA) { | |
| 356 int lgrp_id = os::numa_get_group_id(); | |
| 357 if (lgrp_id != -1) { | |
| 358 thread->set_lgrp_id(lgrp_id); | |
| 359 } | |
| 360 } | |
| 361 | |
| 362 | |
| 363 if (UseVectoredExceptions) { | |
| 364 // If we are using vectored exception we don't need to set a SEH | |
| 365 thread->run(); | |
| 366 } | |
| 367 else { | |
| 368 // Install a win32 structured exception handler around every thread created | |
| 369 // by VM, so VM can genrate error dump when an exception occurred in non- | |
| 370 // Java thread (e.g. VM thread). | |
| 371 __try { | |
| 372 thread->run(); | |
| 373 } __except(topLevelExceptionFilter( | |
| 374 (_EXCEPTION_POINTERS*)_exception_info())) { | |
| 375 // Nothing to do. | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 // One less thread is executing | |
| 380 // When the VMThread gets here, the main thread may have already exited | |
| 381 // which frees the CodeHeap containing the Atomic::add code | |
| 382 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { | |
| 383 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); | |
| 384 } | |
| 385 | |
| 386 return 0; | |
| 387 } | |
| 388 | |
| 389 static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { | |
| 390 // Allocate the OSThread object | |
| 391 OSThread* osthread = new OSThread(NULL, NULL); | |
| 392 if (osthread == NULL) return NULL; | |
| 393 | |
| 394 // Initialize support for Java interrupts | |
| 395 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); | |
| 396 if (interrupt_event == NULL) { | |
| 397 delete osthread; | |
| 398 return NULL; | |
| 399 } | |
| 400 osthread->set_interrupt_event(interrupt_event); | |
| 401 | |
| 402 // Store info on the Win32 thread into the OSThread | |
| 403 osthread->set_thread_handle(thread_handle); | |
| 404 osthread->set_thread_id(thread_id); | |
| 405 | |
| 406 if (UseNUMA) { | |
| 407 int lgrp_id = os::numa_get_group_id(); | |
| 408 if (lgrp_id != -1) { | |
| 409 thread->set_lgrp_id(lgrp_id); | |
| 410 } | |
| 411 } | |
| 412 | |
| 413 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 414 osthread->set_state(INITIALIZED); | |
| 415 | |
| 416 return osthread; | |
| 417 } | |
| 418 | |
| 419 | |
| 420 bool os::create_attached_thread(JavaThread* thread) { | |
| 421 #ifdef ASSERT | |
| 422 thread->verify_not_published(); | |
| 423 #endif | |
| 424 HANDLE thread_h; | |
| 425 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), | |
| 426 &thread_h, THREAD_ALL_ACCESS, false, 0)) { | |
| 427 fatal("DuplicateHandle failed\n"); | |
| 428 } | |
| 429 OSThread* osthread = create_os_thread(thread, thread_h, | |
| 430 (int)current_thread_id()); | |
| 431 if (osthread == NULL) { | |
| 432 return false; | |
| 433 } | |
| 434 | |
| 435 // Initial thread state is RUNNABLE | |
| 436 osthread->set_state(RUNNABLE); | |
| 437 | |
| 438 thread->set_osthread(osthread); | |
| 439 return true; | |
| 440 } | |
| 441 | |
| 442 bool os::create_main_thread(JavaThread* thread) { | |
| 443 #ifdef ASSERT | |
| 444 thread->verify_not_published(); | |
| 445 #endif | |
| 446 if (_starting_thread == NULL) { | |
| 447 _starting_thread = create_os_thread(thread, main_thread, main_thread_id); | |
| 448 if (_starting_thread == NULL) { | |
| 449 return false; | |
| 450 } | |
| 451 } | |
| 452 | |
| 453 // The primordial thread is runnable from the start) | |
| 454 _starting_thread->set_state(RUNNABLE); | |
| 455 | |
| 456 thread->set_osthread(_starting_thread); | |
| 457 return true; | |
| 458 } | |
| 459 | |
| 460 // Allocate and initialize a new OSThread | |
| 461 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 462 unsigned thread_id; | |
| 463 | |
| 464 // Allocate the OSThread object | |
| 465 OSThread* osthread = new OSThread(NULL, NULL); | |
| 466 if (osthread == NULL) { | |
| 467 return false; | |
| 468 } | |
| 469 | |
| 470 // Initialize support for Java interrupts | |
| 471 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); | |
| 472 if (interrupt_event == NULL) { | |
| 473 delete osthread; | |
| 474 return NULL; | |
| 475 } | |
| 476 osthread->set_interrupt_event(interrupt_event); | |
| 477 osthread->set_interrupted(false); | |
| 478 | |
| 479 thread->set_osthread(osthread); | |
| 480 | |
| 481 if (stack_size == 0) { | |
| 482 switch (thr_type) { | |
| 483 case os::java_thread: | |
| 484 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss | |
| 485 if (JavaThread::stack_size_at_create() > 0) | |
| 486 stack_size = JavaThread::stack_size_at_create(); | |
| 487 break; | |
| 488 case os::compiler_thread: | |
| 489 if (CompilerThreadStackSize > 0) { | |
| 490 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 491 break; | |
| 492 } // else fall through: | |
| 493 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 494 case os::vm_thread: | |
| 495 case os::pgc_thread: | |
| 496 case os::cgc_thread: | |
| 497 case os::watcher_thread: | |
| 498 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 499 break; | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 // Create the Win32 thread | |
| 504 // | |
| 505 // Contrary to what MSDN document says, "stack_size" in _beginthreadex() | |
| 506 // does not specify stack size. Instead, it specifies the size of | |
| 507 // initially committed space. The stack size is determined by | |
| 508 // PE header in the executable. If the committed "stack_size" is larger | |
| 509 // than default value in the PE header, the stack is rounded up to the | |
| 510 // nearest multiple of 1MB. For example if the launcher has default | |
| 511 // stack size of 320k, specifying any size less than 320k does not | |
| 512 // affect the actual stack size at all, it only affects the initial | |
| 513 // commitment. On the other hand, specifying 'stack_size' larger than | |
| 514 // default value may cause significant increase in memory usage, because | |
| 515 // not only the stack space will be rounded up to MB, but also the | |
| 516 // entire space is committed upfront. | |
| 517 // | |
| 518 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' | |
| 519 // for CreateThread() that can treat 'stack_size' as stack size. However we | |
| 520 // are not supposed to call CreateThread() directly according to MSDN | |
| 521 // document because JVM uses C runtime library. The good news is that the | |
| 522 // flag appears to work with _beginthredex() as well. | |
| 523 | |
| 524 #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION | |
| 525 #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) | |
| 526 #endif | |
| 527 | |
| 528 HANDLE thread_handle = | |
| 529 (HANDLE)_beginthreadex(NULL, | |
| 530 (unsigned)stack_size, | |
| 531 (unsigned (__stdcall *)(void*)) java_start, | |
| 532 thread, | |
| 533 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, | |
| 534 &thread_id); | |
| 535 if (thread_handle == NULL) { | |
| 536 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again | |
| 537 // without the flag. | |
| 538 thread_handle = | |
| 539 (HANDLE)_beginthreadex(NULL, | |
| 540 (unsigned)stack_size, | |
| 541 (unsigned (__stdcall *)(void*)) java_start, | |
| 542 thread, | |
| 543 CREATE_SUSPENDED, | |
| 544 &thread_id); | |
| 545 } | |
| 546 if (thread_handle == NULL) { | |
| 547 // Need to clean up stuff we've allocated so far | |
| 548 CloseHandle(osthread->interrupt_event()); | |
| 549 thread->set_osthread(NULL); | |
| 550 delete osthread; | |
| 551 return NULL; | |
| 552 } | |
| 553 | |
| 554 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); | |
| 555 | |
| 556 // Store info on the Win32 thread into the OSThread | |
| 557 osthread->set_thread_handle(thread_handle); | |
| 558 osthread->set_thread_id(thread_id); | |
| 559 | |
| 560 // Initial thread state is INITIALIZED, not SUSPENDED | |
| 561 osthread->set_state(INITIALIZED); | |
| 562 | |
| 563 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain | |
| 564 return true; | |
| 565 } | |
| 566 | |
| 567 | |
| 568 // Free Win32 resources related to the OSThread | |
| 569 void os::free_thread(OSThread* osthread) { | |
| 570 assert(osthread != NULL, "osthread not set"); | |
| 571 CloseHandle(osthread->thread_handle()); | |
| 572 CloseHandle(osthread->interrupt_event()); | |
| 573 delete osthread; | |
| 574 } | |
| 575 | |
| 576 | |
| 577 static int has_performance_count = 0; | |
| 578 static jlong first_filetime; | |
| 579 static jlong initial_performance_count; | |
| 580 static jlong performance_frequency; | |
| 581 | |
| 582 | |
| 583 jlong as_long(LARGE_INTEGER x) { | |
| 584 jlong result = 0; // initialization to avoid warning | |
| 585 set_high(&result, x.HighPart); | |
| 586 set_low(&result, x.LowPart); | |
| 587 return result; | |
| 588 } | |
| 589 | |
| 590 | |
| 591 jlong os::elapsed_counter() { | |
| 592 LARGE_INTEGER count; | |
| 593 if (has_performance_count) { | |
| 594 QueryPerformanceCounter(&count); | |
| 595 return as_long(count) - initial_performance_count; | |
| 596 } else { | |
| 597 FILETIME wt; | |
| 598 GetSystemTimeAsFileTime(&wt); | |
| 599 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 | |
| 604 jlong os::elapsed_frequency() { | |
| 605 if (has_performance_count) { | |
| 606 return performance_frequency; | |
| 607 } else { | |
| 608 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. | |
| 609 return 10000000; | |
| 610 } | |
| 611 } | |
| 612 | |
| 613 | |
| 614 julong os::available_memory() { | |
| 615 return win32::available_memory(); | |
| 616 } | |
| 617 | |
| 618 julong os::win32::available_memory() { | |
|
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619 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect |
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620 // value if total memory is larger than 4GB |
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621 MEMORYSTATUSEX ms; |
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622 ms.dwLength = sizeof(ms); |
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623 GlobalMemoryStatusEx(&ms); |
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624 |
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625 return (julong)ms.ullAvailPhys; |
| 0 | 626 } |
| 627 | |
| 628 julong os::physical_memory() { | |
| 629 return win32::physical_memory(); | |
| 630 } | |
| 631 | |
| 632 julong os::allocatable_physical_memory(julong size) { | |
|
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633 #ifdef _LP64 |
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634 return size; |
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635 #else |
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636 // Limit to 1400m because of the 2gb address space wall |
| 0 | 637 return MIN2(size, (julong)1400*M); |
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638 #endif |
| 0 | 639 } |
| 640 | |
| 641 // VC6 lacks DWORD_PTR | |
| 642 #if _MSC_VER < 1300 | |
| 643 typedef UINT_PTR DWORD_PTR; | |
| 644 #endif | |
| 645 | |
| 646 int os::active_processor_count() { | |
| 647 DWORD_PTR lpProcessAffinityMask = 0; | |
| 648 DWORD_PTR lpSystemAffinityMask = 0; | |
| 649 int proc_count = processor_count(); | |
| 650 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && | |
| 651 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { | |
| 652 // Nof active processors is number of bits in process affinity mask | |
| 653 int bitcount = 0; | |
| 654 while (lpProcessAffinityMask != 0) { | |
| 655 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); | |
| 656 bitcount++; | |
| 657 } | |
| 658 return bitcount; | |
| 659 } else { | |
| 660 return proc_count; | |
| 661 } | |
| 662 } | |
| 663 | |
| 664 bool os::distribute_processes(uint length, uint* distribution) { | |
| 665 // Not yet implemented. | |
| 666 return false; | |
| 667 } | |
| 668 | |
| 669 bool os::bind_to_processor(uint processor_id) { | |
| 670 // Not yet implemented. | |
| 671 return false; | |
| 672 } | |
| 673 | |
| 674 static void initialize_performance_counter() { | |
| 675 LARGE_INTEGER count; | |
| 676 if (QueryPerformanceFrequency(&count)) { | |
| 677 has_performance_count = 1; | |
| 678 performance_frequency = as_long(count); | |
| 679 QueryPerformanceCounter(&count); | |
| 680 initial_performance_count = as_long(count); | |
| 681 } else { | |
| 682 has_performance_count = 0; | |
| 683 FILETIME wt; | |
| 684 GetSystemTimeAsFileTime(&wt); | |
| 685 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); | |
| 686 } | |
| 687 } | |
| 688 | |
| 689 | |
| 690 double os::elapsedTime() { | |
| 691 return (double) elapsed_counter() / (double) elapsed_frequency(); | |
| 692 } | |
| 693 | |
| 694 | |
| 695 // Windows format: | |
| 696 // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. | |
| 697 // Java format: | |
| 698 // Java standards require the number of milliseconds since 1/1/1970 | |
| 699 | |
| 700 // Constant offset - calculated using offset() | |
| 701 static jlong _offset = 116444736000000000; | |
| 702 // Fake time counter for reproducible results when debugging | |
| 703 static jlong fake_time = 0; | |
| 704 | |
| 705 #ifdef ASSERT | |
| 706 // Just to be safe, recalculate the offset in debug mode | |
| 707 static jlong _calculated_offset = 0; | |
| 708 static int _has_calculated_offset = 0; | |
| 709 | |
| 710 jlong offset() { | |
| 711 if (_has_calculated_offset) return _calculated_offset; | |
| 712 SYSTEMTIME java_origin; | |
| 713 java_origin.wYear = 1970; | |
| 714 java_origin.wMonth = 1; | |
| 715 java_origin.wDayOfWeek = 0; // ignored | |
| 716 java_origin.wDay = 1; | |
| 717 java_origin.wHour = 0; | |
| 718 java_origin.wMinute = 0; | |
| 719 java_origin.wSecond = 0; | |
| 720 java_origin.wMilliseconds = 0; | |
| 721 FILETIME jot; | |
| 722 if (!SystemTimeToFileTime(&java_origin, &jot)) { | |
| 723 fatal1("Error = %d\nWindows error", GetLastError()); | |
| 724 } | |
| 725 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); | |
| 726 _has_calculated_offset = 1; | |
| 727 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); | |
| 728 return _calculated_offset; | |
| 729 } | |
| 730 #else | |
| 731 jlong offset() { | |
| 732 return _offset; | |
| 733 } | |
| 734 #endif | |
| 735 | |
| 736 jlong windows_to_java_time(FILETIME wt) { | |
| 737 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); | |
| 738 return (a - offset()) / 10000; | |
| 739 } | |
| 740 | |
| 741 FILETIME java_to_windows_time(jlong l) { | |
| 742 jlong a = (l * 10000) + offset(); | |
| 743 FILETIME result; | |
| 744 result.dwHighDateTime = high(a); | |
| 745 result.dwLowDateTime = low(a); | |
| 746 return result; | |
| 747 } | |
| 748 | |
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749 // For now, we say that Windows does not support vtime. I have no idea |
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750 // whether it can actually be made to (DLD, 9/13/05). |
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751 |
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752 bool os::supports_vtime() { return false; } |
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753 bool os::enable_vtime() { return false; } |
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754 bool os::vtime_enabled() { return false; } |
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755 double os::elapsedVTime() { |
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756 // better than nothing, but not much |
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757 return elapsedTime(); |
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758 } |
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759 |
| 0 | 760 jlong os::javaTimeMillis() { |
| 761 if (UseFakeTimers) { | |
| 762 return fake_time++; | |
| 763 } else { | |
| 61 | 764 FILETIME wt; |
| 765 GetSystemTimeAsFileTime(&wt); | |
| 766 return windows_to_java_time(wt); | |
| 0 | 767 } |
| 768 } | |
| 769 | |
| 770 #define NANOS_PER_SEC CONST64(1000000000) | |
| 771 #define NANOS_PER_MILLISEC 1000000 | |
| 772 jlong os::javaTimeNanos() { | |
| 773 if (!has_performance_count) { | |
| 774 return javaTimeMillis() * NANOS_PER_MILLISEC; // the best we can do. | |
| 775 } else { | |
| 776 LARGE_INTEGER current_count; | |
| 777 QueryPerformanceCounter(¤t_count); | |
| 778 double current = as_long(current_count); | |
| 779 double freq = performance_frequency; | |
| 780 jlong time = (jlong)((current/freq) * NANOS_PER_SEC); | |
| 781 return time; | |
| 782 } | |
| 783 } | |
| 784 | |
| 785 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 786 if (!has_performance_count) { | |
| 787 // javaTimeMillis() doesn't have much percision, | |
| 788 // but it is not going to wrap -- so all 64 bits | |
| 789 info_ptr->max_value = ALL_64_BITS; | |
| 790 | |
| 791 // this is a wall clock timer, so may skip | |
| 792 info_ptr->may_skip_backward = true; | |
| 793 info_ptr->may_skip_forward = true; | |
| 794 } else { | |
| 795 jlong freq = performance_frequency; | |
| 796 if (freq < NANOS_PER_SEC) { | |
| 797 // the performance counter is 64 bits and we will | |
| 798 // be multiplying it -- so no wrap in 64 bits | |
| 799 info_ptr->max_value = ALL_64_BITS; | |
| 800 } else if (freq > NANOS_PER_SEC) { | |
| 801 // use the max value the counter can reach to | |
| 802 // determine the max value which could be returned | |
| 803 julong max_counter = (julong)ALL_64_BITS; | |
| 804 info_ptr->max_value = (jlong)(max_counter / (freq / NANOS_PER_SEC)); | |
| 805 } else { | |
| 806 // the performance counter is 64 bits and we will | |
| 807 // be using it directly -- so no wrap in 64 bits | |
| 808 info_ptr->max_value = ALL_64_BITS; | |
| 809 } | |
| 810 | |
| 811 // using a counter, so no skipping | |
| 812 info_ptr->may_skip_backward = false; | |
| 813 info_ptr->may_skip_forward = false; | |
| 814 } | |
| 815 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 816 } | |
| 817 | |
| 818 char* os::local_time_string(char *buf, size_t buflen) { | |
| 819 SYSTEMTIME st; | |
| 820 GetLocalTime(&st); | |
| 821 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 822 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); | |
| 823 return buf; | |
| 824 } | |
| 825 | |
| 826 bool os::getTimesSecs(double* process_real_time, | |
| 827 double* process_user_time, | |
| 828 double* process_system_time) { | |
| 829 HANDLE h_process = GetCurrentProcess(); | |
| 830 FILETIME create_time, exit_time, kernel_time, user_time; | |
| 831 BOOL result = GetProcessTimes(h_process, | |
| 832 &create_time, | |
| 833 &exit_time, | |
| 834 &kernel_time, | |
| 835 &user_time); | |
| 836 if (result != 0) { | |
| 837 FILETIME wt; | |
| 838 GetSystemTimeAsFileTime(&wt); | |
| 839 jlong rtc_millis = windows_to_java_time(wt); | |
| 840 jlong user_millis = windows_to_java_time(user_time); | |
| 841 jlong system_millis = windows_to_java_time(kernel_time); | |
| 842 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); | |
| 843 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); | |
| 844 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); | |
| 845 return true; | |
| 846 } else { | |
| 847 return false; | |
| 848 } | |
| 849 } | |
| 850 | |
| 851 void os::shutdown() { | |
| 852 | |
| 853 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 854 perfMemory_exit(); | |
| 855 | |
| 856 // flush buffered output, finish log files | |
| 857 ostream_abort(); | |
| 858 | |
| 859 // Check for abort hook | |
| 860 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 861 if (abort_hook != NULL) { | |
| 862 abort_hook(); | |
| 863 } | |
| 864 } | |
| 865 | |
| 866 void os::abort(bool dump_core) | |
| 867 { | |
| 868 os::shutdown(); | |
| 869 // no core dump on Windows | |
| 870 ::exit(1); | |
| 871 } | |
| 872 | |
| 873 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 874 void os::die() { | |
| 875 _exit(-1); | |
| 876 } | |
| 877 | |
| 878 // Directory routines copied from src/win32/native/java/io/dirent_md.c | |
| 879 // * dirent_md.c 1.15 00/02/02 | |
| 880 // | |
| 881 // The declarations for DIR and struct dirent are in jvm_win32.h. | |
| 882 | |
| 883 /* Caller must have already run dirname through JVM_NativePath, which removes | |
| 884 duplicate slashes and converts all instances of '/' into '\\'. */ | |
| 885 | |
| 886 DIR * | |
| 887 os::opendir(const char *dirname) | |
| 888 { | |
| 889 assert(dirname != NULL, "just checking"); // hotspot change | |
| 890 DIR *dirp = (DIR *)malloc(sizeof(DIR)); | |
| 891 DWORD fattr; // hotspot change | |
| 892 char alt_dirname[4] = { 0, 0, 0, 0 }; | |
| 893 | |
| 894 if (dirp == 0) { | |
| 895 errno = ENOMEM; | |
| 896 return 0; | |
| 897 } | |
| 898 | |
| 899 /* | |
| 900 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it | |
| 901 * as a directory in FindFirstFile(). We detect this case here and | |
| 902 * prepend the current drive name. | |
| 903 */ | |
| 904 if (dirname[1] == '\0' && dirname[0] == '\\') { | |
| 905 alt_dirname[0] = _getdrive() + 'A' - 1; | |
| 906 alt_dirname[1] = ':'; | |
| 907 alt_dirname[2] = '\\'; | |
| 908 alt_dirname[3] = '\0'; | |
| 909 dirname = alt_dirname; | |
| 910 } | |
| 911 | |
| 912 dirp->path = (char *)malloc(strlen(dirname) + 5); | |
| 913 if (dirp->path == 0) { | |
| 914 free(dirp); | |
| 915 errno = ENOMEM; | |
| 916 return 0; | |
| 917 } | |
| 918 strcpy(dirp->path, dirname); | |
| 919 | |
| 920 fattr = GetFileAttributes(dirp->path); | |
| 921 if (fattr == 0xffffffff) { | |
| 922 free(dirp->path); | |
| 923 free(dirp); | |
| 924 errno = ENOENT; | |
| 925 return 0; | |
| 926 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { | |
| 927 free(dirp->path); | |
| 928 free(dirp); | |
| 929 errno = ENOTDIR; | |
| 930 return 0; | |
| 931 } | |
| 932 | |
| 933 /* Append "*.*", or possibly "\\*.*", to path */ | |
| 934 if (dirp->path[1] == ':' | |
| 935 && (dirp->path[2] == '\0' | |
| 936 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { | |
| 937 /* No '\\' needed for cases like "Z:" or "Z:\" */ | |
| 938 strcat(dirp->path, "*.*"); | |
| 939 } else { | |
| 940 strcat(dirp->path, "\\*.*"); | |
| 941 } | |
| 942 | |
| 943 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); | |
| 944 if (dirp->handle == INVALID_HANDLE_VALUE) { | |
| 945 if (GetLastError() != ERROR_FILE_NOT_FOUND) { | |
| 946 free(dirp->path); | |
| 947 free(dirp); | |
| 948 errno = EACCES; | |
| 949 return 0; | |
| 950 } | |
| 951 } | |
| 952 return dirp; | |
| 953 } | |
| 954 | |
| 955 /* parameter dbuf unused on Windows */ | |
| 956 | |
| 957 struct dirent * | |
| 958 os::readdir(DIR *dirp, dirent *dbuf) | |
| 959 { | |
| 960 assert(dirp != NULL, "just checking"); // hotspot change | |
| 961 if (dirp->handle == INVALID_HANDLE_VALUE) { | |
| 962 return 0; | |
| 963 } | |
| 964 | |
| 965 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); | |
| 966 | |
| 967 if (!FindNextFile(dirp->handle, &dirp->find_data)) { | |
| 968 if (GetLastError() == ERROR_INVALID_HANDLE) { | |
| 969 errno = EBADF; | |
| 970 return 0; | |
| 971 } | |
| 972 FindClose(dirp->handle); | |
| 973 dirp->handle = INVALID_HANDLE_VALUE; | |
| 974 } | |
| 975 | |
| 976 return &dirp->dirent; | |
| 977 } | |
| 978 | |
| 979 int | |
| 980 os::closedir(DIR *dirp) | |
| 981 { | |
| 982 assert(dirp != NULL, "just checking"); // hotspot change | |
| 983 if (dirp->handle != INVALID_HANDLE_VALUE) { | |
| 984 if (!FindClose(dirp->handle)) { | |
| 985 errno = EBADF; | |
| 986 return -1; | |
| 987 } | |
| 988 dirp->handle = INVALID_HANDLE_VALUE; | |
| 989 } | |
| 990 free(dirp->path); | |
| 991 free(dirp); | |
| 992 return 0; | |
| 993 } | |
| 994 | |
| 995 const char* os::dll_file_extension() { return ".dll"; } | |
| 996 | |
| 997 const char * os::get_temp_directory() | |
| 998 { | |
| 999 static char path_buf[MAX_PATH]; | |
| 1000 if (GetTempPath(MAX_PATH, path_buf)>0) | |
| 1001 return path_buf; | |
| 1002 else{ | |
| 1003 path_buf[0]='\0'; | |
| 1004 return path_buf; | |
| 1005 } | |
| 1006 } | |
| 1007 | |
| 691 | 1008 static bool file_exists(const char* filename) { |
| 1009 if (filename == NULL || strlen(filename) == 0) { | |
| 1010 return false; | |
| 1011 } | |
| 1012 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; | |
| 1013 } | |
| 1014 | |
| 1015 void os::dll_build_name(char *buffer, size_t buflen, | |
| 1016 const char* pname, const char* fname) { | |
| 1017 // Copied from libhpi | |
| 1018 const size_t pnamelen = pname ? strlen(pname) : 0; | |
| 1019 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; | |
| 1020 | |
| 1021 // Quietly truncates on buffer overflow. Should be an error. | |
| 1022 if (pnamelen + strlen(fname) + 10 > buflen) { | |
| 1023 *buffer = '\0'; | |
| 1024 return; | |
| 1025 } | |
| 1026 | |
| 1027 if (pnamelen == 0) { | |
| 1028 jio_snprintf(buffer, buflen, "%s.dll", fname); | |
| 1029 } else if (c == ':' || c == '\\') { | |
| 1030 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); | |
| 1031 } else if (strchr(pname, *os::path_separator()) != NULL) { | |
| 1032 int n; | |
| 1033 char** pelements = split_path(pname, &n); | |
| 1034 for (int i = 0 ; i < n ; i++) { | |
| 1035 char* path = pelements[i]; | |
| 1036 // Really shouldn't be NULL, but check can't hurt | |
| 1037 size_t plen = (path == NULL) ? 0 : strlen(path); | |
| 1038 if (plen == 0) { | |
| 1039 continue; // skip the empty path values | |
| 1040 } | |
| 1041 const char lastchar = path[plen - 1]; | |
| 1042 if (lastchar == ':' || lastchar == '\\') { | |
| 1043 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); | |
| 1044 } else { | |
| 1045 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); | |
| 1046 } | |
| 1047 if (file_exists(buffer)) { | |
| 1048 break; | |
| 1049 } | |
| 242 | 1050 } |
| 691 | 1051 // release the storage |
| 1052 for (int i = 0 ; i < n ; i++) { | |
| 1053 if (pelements[i] != NULL) { | |
| 1054 FREE_C_HEAP_ARRAY(char, pelements[i]); | |
| 1055 } | |
| 242 | 1056 } |
| 691 | 1057 if (pelements != NULL) { |
| 1058 FREE_C_HEAP_ARRAY(char*, pelements); | |
| 1059 } | |
| 1060 } else { | |
| 1061 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); | |
| 1062 } | |
| 242 | 1063 } |
| 1064 | |
| 0 | 1065 // Needs to be in os specific directory because windows requires another |
| 1066 // header file <direct.h> | |
| 1067 const char* os::get_current_directory(char *buf, int buflen) { | |
| 1068 return _getcwd(buf, buflen); | |
| 1069 } | |
| 1070 | |
| 1071 //----------------------------------------------------------- | |
| 1072 // Helper functions for fatal error handler | |
| 1073 | |
| 1074 // The following library functions are resolved dynamically at runtime: | |
| 1075 | |
| 1076 // PSAPI functions, for Windows NT, 2000, XP | |
| 1077 | |
| 1078 // psapi.h doesn't come with Visual Studio 6; it can be downloaded as Platform | |
| 1079 // SDK from Microsoft. Here are the definitions copied from psapi.h | |
| 1080 typedef struct _MODULEINFO { | |
| 1081 LPVOID lpBaseOfDll; | |
| 1082 DWORD SizeOfImage; | |
| 1083 LPVOID EntryPoint; | |
| 1084 } MODULEINFO, *LPMODULEINFO; | |
| 1085 | |
| 1086 static BOOL (WINAPI *_EnumProcessModules) ( HANDLE, HMODULE *, DWORD, LPDWORD ); | |
| 1087 static DWORD (WINAPI *_GetModuleFileNameEx) ( HANDLE, HMODULE, LPTSTR, DWORD ); | |
| 1088 static BOOL (WINAPI *_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD ); | |
| 1089 | |
| 1090 // ToolHelp Functions, for Windows 95, 98 and ME | |
| 1091 | |
| 1092 static HANDLE(WINAPI *_CreateToolhelp32Snapshot)(DWORD,DWORD) ; | |
| 1093 static BOOL (WINAPI *_Module32First) (HANDLE,LPMODULEENTRY32) ; | |
| 1094 static BOOL (WINAPI *_Module32Next) (HANDLE,LPMODULEENTRY32) ; | |
| 1095 | |
| 1096 bool _has_psapi; | |
| 1097 bool _psapi_init = false; | |
| 1098 bool _has_toolhelp; | |
| 1099 | |
| 1100 static bool _init_psapi() { | |
| 1101 HINSTANCE psapi = LoadLibrary( "PSAPI.DLL" ) ; | |
| 1102 if( psapi == NULL ) return false ; | |
| 1103 | |
| 1104 _EnumProcessModules = CAST_TO_FN_PTR( | |
| 1105 BOOL(WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD), | |
| 1106 GetProcAddress(psapi, "EnumProcessModules")) ; | |
| 1107 _GetModuleFileNameEx = CAST_TO_FN_PTR( | |
| 1108 DWORD (WINAPI *)(HANDLE, HMODULE, LPTSTR, DWORD), | |
| 1109 GetProcAddress(psapi, "GetModuleFileNameExA")); | |
| 1110 _GetModuleInformation = CAST_TO_FN_PTR( | |
| 1111 BOOL (WINAPI *)(HANDLE, HMODULE, LPMODULEINFO, DWORD), | |
| 1112 GetProcAddress(psapi, "GetModuleInformation")); | |
| 1113 | |
| 1114 _has_psapi = (_EnumProcessModules && _GetModuleFileNameEx && _GetModuleInformation); | |
| 1115 _psapi_init = true; | |
| 1116 return _has_psapi; | |
| 1117 } | |
| 1118 | |
| 1119 static bool _init_toolhelp() { | |
| 1120 HINSTANCE kernel32 = LoadLibrary("Kernel32.DLL") ; | |
| 1121 if (kernel32 == NULL) return false ; | |
| 1122 | |
| 1123 _CreateToolhelp32Snapshot = CAST_TO_FN_PTR( | |
| 1124 HANDLE(WINAPI *)(DWORD,DWORD), | |
| 1125 GetProcAddress(kernel32, "CreateToolhelp32Snapshot")); | |
| 1126 _Module32First = CAST_TO_FN_PTR( | |
| 1127 BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), | |
| 1128 GetProcAddress(kernel32, "Module32First" )); | |
| 1129 _Module32Next = CAST_TO_FN_PTR( | |
| 1130 BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), | |
| 1131 GetProcAddress(kernel32, "Module32Next" )); | |
| 1132 | |
| 1133 _has_toolhelp = (_CreateToolhelp32Snapshot && _Module32First && _Module32Next); | |
| 1134 return _has_toolhelp; | |
| 1135 } | |
| 1136 | |
| 1137 #ifdef _WIN64 | |
| 1138 // Helper routine which returns true if address in | |
| 1139 // within the NTDLL address space. | |
| 1140 // | |
| 1141 static bool _addr_in_ntdll( address addr ) | |
| 1142 { | |
| 1143 HMODULE hmod; | |
| 1144 MODULEINFO minfo; | |
| 1145 | |
| 1146 hmod = GetModuleHandle("NTDLL.DLL"); | |
| 1147 if ( hmod == NULL ) return false; | |
| 1148 if ( !_GetModuleInformation( GetCurrentProcess(), hmod, | |
| 1149 &minfo, sizeof(MODULEINFO)) ) | |
| 1150 return false; | |
| 1151 | |
| 1152 if ( (addr >= minfo.lpBaseOfDll) && | |
| 1153 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) | |
| 1154 return true; | |
| 1155 else | |
| 1156 return false; | |
| 1157 } | |
| 1158 #endif | |
| 1159 | |
| 1160 | |
| 1161 // Enumerate all modules for a given process ID | |
| 1162 // | |
| 1163 // Notice that Windows 95/98/Me and Windows NT/2000/XP have | |
| 1164 // different API for doing this. We use PSAPI.DLL on NT based | |
| 1165 // Windows and ToolHelp on 95/98/Me. | |
| 1166 | |
| 1167 // Callback function that is called by enumerate_modules() on | |
| 1168 // every DLL module. | |
| 1169 // Input parameters: | |
| 1170 // int pid, | |
| 1171 // char* module_file_name, | |
| 1172 // address module_base_addr, | |
| 1173 // unsigned module_size, | |
| 1174 // void* param | |
| 1175 typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); | |
| 1176 | |
| 1177 // enumerate_modules for Windows NT, using PSAPI | |
| 1178 static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) | |
| 1179 { | |
| 1180 HANDLE hProcess ; | |
| 1181 | |
| 1182 # define MAX_NUM_MODULES 128 | |
| 1183 HMODULE modules[MAX_NUM_MODULES]; | |
| 1184 static char filename[ MAX_PATH ]; | |
| 1185 int result = 0; | |
| 1186 | |
| 1187 if (!_has_psapi && (_psapi_init || !_init_psapi())) return 0; | |
| 1188 | |
| 1189 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, | |
| 1190 FALSE, pid ) ; | |
| 1191 if (hProcess == NULL) return 0; | |
| 1192 | |
| 1193 DWORD size_needed; | |
| 1194 if (!_EnumProcessModules(hProcess, modules, | |
| 1195 sizeof(modules), &size_needed)) { | |
| 1196 CloseHandle( hProcess ); | |
| 1197 return 0; | |
| 1198 } | |
| 1199 | |
| 1200 // number of modules that are currently loaded | |
| 1201 int num_modules = size_needed / sizeof(HMODULE); | |
| 1202 | |
| 1203 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { | |
| 1204 // Get Full pathname: | |
| 1205 if(!_GetModuleFileNameEx(hProcess, modules[i], | |
| 1206 filename, sizeof(filename))) { | |
| 1207 filename[0] = '\0'; | |
| 1208 } | |
| 1209 | |
| 1210 MODULEINFO modinfo; | |
| 1211 if (!_GetModuleInformation(hProcess, modules[i], | |
| 1212 &modinfo, sizeof(modinfo))) { | |
| 1213 modinfo.lpBaseOfDll = NULL; | |
| 1214 modinfo.SizeOfImage = 0; | |
| 1215 } | |
| 1216 | |
| 1217 // Invoke callback function | |
| 1218 result = func(pid, filename, (address)modinfo.lpBaseOfDll, | |
| 1219 modinfo.SizeOfImage, param); | |
| 1220 if (result) break; | |
| 1221 } | |
| 1222 | |
| 1223 CloseHandle( hProcess ) ; | |
| 1224 return result; | |
| 1225 } | |
| 1226 | |
| 1227 | |
| 1228 // enumerate_modules for Windows 95/98/ME, using TOOLHELP | |
| 1229 static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) | |
| 1230 { | |
| 1231 HANDLE hSnapShot ; | |
| 1232 static MODULEENTRY32 modentry ; | |
| 1233 int result = 0; | |
| 1234 | |
| 1235 if (!_has_toolhelp) return 0; | |
| 1236 | |
| 1237 // Get a handle to a Toolhelp snapshot of the system | |
| 1238 hSnapShot = _CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; | |
| 1239 if( hSnapShot == INVALID_HANDLE_VALUE ) { | |
| 1240 return FALSE ; | |
| 1241 } | |
| 1242 | |
| 1243 // iterate through all modules | |
| 1244 modentry.dwSize = sizeof(MODULEENTRY32) ; | |
| 1245 bool not_done = _Module32First( hSnapShot, &modentry ) != 0; | |
| 1246 | |
| 1247 while( not_done ) { | |
| 1248 // invoke the callback | |
| 1249 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, | |
| 1250 modentry.modBaseSize, param); | |
| 1251 if (result) break; | |
| 1252 | |
| 1253 modentry.dwSize = sizeof(MODULEENTRY32) ; | |
| 1254 not_done = _Module32Next( hSnapShot, &modentry ) != 0; | |
| 1255 } | |
| 1256 | |
| 1257 CloseHandle(hSnapShot); | |
| 1258 return result; | |
| 1259 } | |
| 1260 | |
| 1261 int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) | |
| 1262 { | |
| 1263 // Get current process ID if caller doesn't provide it. | |
| 1264 if (!pid) pid = os::current_process_id(); | |
| 1265 | |
| 1266 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); | |
| 1267 else return _enumerate_modules_windows(pid, func, param); | |
| 1268 } | |
| 1269 | |
| 1270 struct _modinfo { | |
| 1271 address addr; | |
| 1272 char* full_path; // point to a char buffer | |
| 1273 int buflen; // size of the buffer | |
| 1274 address base_addr; | |
| 1275 }; | |
| 1276 | |
| 1277 static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, | |
| 1278 unsigned size, void * param) { | |
| 1279 struct _modinfo *pmod = (struct _modinfo *)param; | |
| 1280 if (!pmod) return -1; | |
| 1281 | |
| 1282 if (base_addr <= pmod->addr && | |
| 1283 base_addr+size > pmod->addr) { | |
| 1284 // if a buffer is provided, copy path name to the buffer | |
| 1285 if (pmod->full_path) { | |
| 1286 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); | |
| 1287 } | |
| 1288 pmod->base_addr = base_addr; | |
| 1289 return 1; | |
| 1290 } | |
| 1291 return 0; | |
| 1292 } | |
| 1293 | |
| 1294 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1295 int buflen, int* offset) { | |
| 1296 // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always | |
| 1297 // return the full path to the DLL file, sometimes it returns path | |
| 1298 // to the corresponding PDB file (debug info); sometimes it only | |
| 1299 // returns partial path, which makes life painful. | |
| 1300 | |
| 1301 struct _modinfo mi; | |
| 1302 mi.addr = addr; | |
| 1303 mi.full_path = buf; | |
| 1304 mi.buflen = buflen; | |
| 1305 int pid = os::current_process_id(); | |
| 1306 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { | |
| 1307 // buf already contains path name | |
| 1308 if (offset) *offset = addr - mi.base_addr; | |
| 1309 return true; | |
| 1310 } else { | |
| 1311 if (buf) buf[0] = '\0'; | |
| 1312 if (offset) *offset = -1; | |
| 1313 return false; | |
| 1314 } | |
| 1315 } | |
| 1316 | |
| 1317 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1318 int buflen, int *offset) { | |
| 1319 // Unimplemented on Windows - in order to use SymGetSymFromAddr(), | |
| 1320 // we need to initialize imagehlp/dbghelp, then load symbol table | |
| 1321 // for every module. That's too much work to do after a fatal error. | |
| 1322 // For an example on how to implement this function, see 1.4.2. | |
| 1323 if (offset) *offset = -1; | |
| 1324 if (buf) buf[0] = '\0'; | |
| 1325 return false; | |
| 1326 } | |
| 1327 | |
| 242 | 1328 void* os::dll_lookup(void* handle, const char* name) { |
| 1329 return GetProcAddress((HMODULE)handle, name); | |
| 1330 } | |
| 1331 | |
| 0 | 1332 // save the start and end address of jvm.dll into param[0] and param[1] |
| 1333 static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, | |
| 1334 unsigned size, void * param) { | |
| 1335 if (!param) return -1; | |
| 1336 | |
| 1337 if (base_addr <= (address)_locate_jvm_dll && | |
| 1338 base_addr+size > (address)_locate_jvm_dll) { | |
| 1339 ((address*)param)[0] = base_addr; | |
| 1340 ((address*)param)[1] = base_addr + size; | |
| 1341 return 1; | |
| 1342 } | |
| 1343 return 0; | |
| 1344 } | |
| 1345 | |
| 1346 address vm_lib_location[2]; // start and end address of jvm.dll | |
| 1347 | |
| 1348 // check if addr is inside jvm.dll | |
| 1349 bool os::address_is_in_vm(address addr) { | |
| 1350 if (!vm_lib_location[0] || !vm_lib_location[1]) { | |
| 1351 int pid = os::current_process_id(); | |
| 1352 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { | |
| 1353 assert(false, "Can't find jvm module."); | |
| 1354 return false; | |
| 1355 } | |
| 1356 } | |
| 1357 | |
| 1358 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); | |
| 1359 } | |
| 1360 | |
| 1361 // print module info; param is outputStream* | |
| 1362 static int _print_module(int pid, char* fname, address base, | |
| 1363 unsigned size, void* param) { | |
| 1364 if (!param) return -1; | |
| 1365 | |
| 1366 outputStream* st = (outputStream*)param; | |
| 1367 | |
| 1368 address end_addr = base + size; | |
| 1369 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); | |
| 1370 return 0; | |
| 1371 } | |
| 1372 | |
| 1373 // Loads .dll/.so and | |
| 1374 // in case of error it checks if .dll/.so was built for the | |
| 1375 // same architecture as Hotspot is running on | |
| 1376 void * os::dll_load(const char *name, char *ebuf, int ebuflen) | |
| 1377 { | |
| 1378 void * result = LoadLibrary(name); | |
| 1379 if (result != NULL) | |
| 1380 { | |
| 1381 return result; | |
| 1382 } | |
| 1383 | |
| 1384 long errcode = GetLastError(); | |
| 1385 if (errcode == ERROR_MOD_NOT_FOUND) { | |
| 1386 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); | |
| 1387 ebuf[ebuflen-1]='\0'; | |
| 1388 return NULL; | |
| 1389 } | |
| 1390 | |
| 1391 // Parsing dll below | |
| 1392 // If we can read dll-info and find that dll was built | |
| 1393 // for an architecture other than Hotspot is running in | |
| 1394 // - then print to buffer "DLL was built for a different architecture" | |
| 1395 // else call getLastErrorString to obtain system error message | |
| 1396 | |
| 1397 // Read system error message into ebuf | |
| 1398 // It may or may not be overwritten below (in the for loop and just above) | |
| 1399 getLastErrorString(ebuf, (size_t) ebuflen); | |
| 1400 ebuf[ebuflen-1]='\0'; | |
| 1401 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); | |
| 1402 if (file_descriptor<0) | |
| 1403 { | |
| 1404 return NULL; | |
| 1405 } | |
| 1406 | |
| 1407 uint32_t signature_offset; | |
| 1408 uint16_t lib_arch=0; | |
| 1409 bool failed_to_get_lib_arch= | |
| 1410 ( | |
| 1411 //Go to position 3c in the dll | |
| 1412 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) | |
| 1413 || | |
| 1414 // Read loacation of signature | |
| 1415 (sizeof(signature_offset)!= | |
| 1416 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) | |
| 1417 || | |
| 1418 //Go to COFF File Header in dll | |
| 1419 //that is located after"signature" (4 bytes long) | |
| 1420 (os::seek_to_file_offset(file_descriptor, | |
| 1421 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) | |
| 1422 || | |
| 1423 //Read field that contains code of architecture | |
| 1424 // that dll was build for | |
| 1425 (sizeof(lib_arch)!= | |
| 1426 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) | |
| 1427 ); | |
| 1428 | |
| 1429 ::close(file_descriptor); | |
| 1430 if (failed_to_get_lib_arch) | |
| 1431 { | |
| 1432 // file i/o error - report getLastErrorString(...) msg | |
| 1433 return NULL; | |
| 1434 } | |
| 1435 | |
| 1436 typedef struct | |
| 1437 { | |
| 1438 uint16_t arch_code; | |
| 1439 char* arch_name; | |
| 1440 } arch_t; | |
| 1441 | |
| 1442 static const arch_t arch_array[]={ | |
| 1443 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, | |
| 1444 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, | |
| 1445 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} | |
| 1446 }; | |
| 1447 #if (defined _M_IA64) | |
| 1448 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; | |
| 1449 #elif (defined _M_AMD64) | |
| 1450 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; | |
| 1451 #elif (defined _M_IX86) | |
| 1452 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; | |
| 1453 #else | |
| 1454 #error Method os::dll_load requires that one of following \ | |
| 1455 is defined :_M_IA64,_M_AMD64 or _M_IX86 | |
| 1456 #endif | |
| 1457 | |
| 1458 | |
| 1459 // Obtain a string for printf operation | |
| 1460 // lib_arch_str shall contain string what platform this .dll was built for | |
| 1461 // running_arch_str shall string contain what platform Hotspot was built for | |
| 1462 char *running_arch_str=NULL,*lib_arch_str=NULL; | |
| 1463 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) | |
| 1464 { | |
| 1465 if (lib_arch==arch_array[i].arch_code) | |
| 1466 lib_arch_str=arch_array[i].arch_name; | |
| 1467 if (running_arch==arch_array[i].arch_code) | |
| 1468 running_arch_str=arch_array[i].arch_name; | |
| 1469 } | |
| 1470 | |
| 1471 assert(running_arch_str, | |
| 1472 "Didn't find runing architecture code in arch_array"); | |
| 1473 | |
| 1474 // If the architure is right | |
| 1475 // but some other error took place - report getLastErrorString(...) msg | |
| 1476 if (lib_arch == running_arch) | |
| 1477 { | |
| 1478 return NULL; | |
| 1479 } | |
| 1480 | |
| 1481 if (lib_arch_str!=NULL) | |
| 1482 { | |
| 1483 ::_snprintf(ebuf, ebuflen-1, | |
| 1484 "Can't load %s-bit .dll on a %s-bit platform", | |
| 1485 lib_arch_str,running_arch_str); | |
| 1486 } | |
| 1487 else | |
| 1488 { | |
| 1489 // don't know what architecture this dll was build for | |
| 1490 ::_snprintf(ebuf, ebuflen-1, | |
| 1491 "Can't load this .dll (machine code=0x%x) on a %s-bit platform", | |
| 1492 lib_arch,running_arch_str); | |
| 1493 } | |
| 1494 | |
| 1495 return NULL; | |
| 1496 } | |
| 1497 | |
| 1498 | |
| 1499 void os::print_dll_info(outputStream *st) { | |
| 1500 int pid = os::current_process_id(); | |
| 1501 st->print_cr("Dynamic libraries:"); | |
| 1502 enumerate_modules(pid, _print_module, (void *)st); | |
| 1503 } | |
| 1504 | |
|
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1505 // function pointer to Windows API "GetNativeSystemInfo". |
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1506 typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO); |
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1507 static GetNativeSystemInfo_func_type _GetNativeSystemInfo; |
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1508 |
| 0 | 1509 void os::print_os_info(outputStream* st) { |
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1510 st->print("OS:"); |
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1511 |
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1512 OSVERSIONINFOEX osvi; |
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1513 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); |
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1514 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); |
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1515 |
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1516 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { |
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1517 st->print_cr("N/A"); |
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1518 return; |
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1519 } |
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1520 |
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1521 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; |
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1522 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { |
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1523 switch (os_vers) { |
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1524 case 3051: st->print(" Windows NT 3.51"); break; |
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1525 case 4000: st->print(" Windows NT 4.0"); break; |
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1526 case 5000: st->print(" Windows 2000"); break; |
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1527 case 5001: st->print(" Windows XP"); break; |
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1528 case 5002: |
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1529 case 6000: { |
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1530 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could |
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1531 // find out whether we are running on 64 bit processor or not. |
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1532 SYSTEM_INFO si; |
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1533 ZeroMemory(&si, sizeof(SYSTEM_INFO)); |
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1534 // Check to see if _GetNativeSystemInfo has been initialized. |
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1535 if (_GetNativeSystemInfo == NULL) { |
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1536 HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll")); |
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1537 _GetNativeSystemInfo = |
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1538 CAST_TO_FN_PTR(GetNativeSystemInfo_func_type, |
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1539 GetProcAddress(hKernel32, |
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1540 "GetNativeSystemInfo")); |
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1541 if (_GetNativeSystemInfo == NULL) |
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1542 GetSystemInfo(&si); |
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1543 } else { |
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1544 _GetNativeSystemInfo(&si); |
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1545 } |
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1546 if (os_vers == 5002) { |
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1547 if (osvi.wProductType == VER_NT_WORKSTATION && |
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1548 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) |
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1549 st->print(" Windows XP x64 Edition"); |
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1550 else |
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1551 st->print(" Windows Server 2003 family"); |
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1552 } else { // os_vers == 6000 |
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1553 if (osvi.wProductType == VER_NT_WORKSTATION) |
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1554 st->print(" Windows Vista"); |
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1555 else |
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1556 st->print(" Windows Server 2008"); |
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1557 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) |
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1558 st->print(" , 64 bit"); |
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1559 } |
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1560 break; |
|
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1561 } |
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1562 default: // future windows, print out its major and minor versions |
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1563 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); |
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1564 } |
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1565 } else { |
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1566 switch (os_vers) { |
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1567 case 4000: st->print(" Windows 95"); break; |
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1568 case 4010: st->print(" Windows 98"); break; |
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1569 case 4090: st->print(" Windows Me"); break; |
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1570 default: // future windows, print out its major and minor versions |
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1571 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); |
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1572 } |
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1573 } |
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1574 st->print(" Build %d", osvi.dwBuildNumber); |
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1575 st->print(" %s", osvi.szCSDVersion); // service pack |
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1576 st->cr(); |
| 0 | 1577 } |
| 1578 | |
| 1579 void os::print_memory_info(outputStream* st) { | |
| 1580 st->print("Memory:"); | |
| 1581 st->print(" %dk page", os::vm_page_size()>>10); | |
| 1582 | |
|
877
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|
1583 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect |
|
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|
1584 // value if total memory is larger than 4GB |
|
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|
1585 MEMORYSTATUSEX ms; |
|
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|
1586 ms.dwLength = sizeof(ms); |
|
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|
1587 GlobalMemoryStatusEx(&ms); |
| 0 | 1588 |
| 1589 st->print(", physical %uk", os::physical_memory() >> 10); | |
| 1590 st->print("(%uk free)", os::available_memory() >> 10); | |
| 1591 | |
|
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|
1592 st->print(", swap %uk", ms.ullTotalPageFile >> 10); |
|
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|
1593 st->print("(%uk free)", ms.ullAvailPageFile >> 10); |
| 0 | 1594 st->cr(); |
| 1595 } | |
| 1596 | |
| 1597 void os::print_siginfo(outputStream *st, void *siginfo) { | |
| 1598 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; | |
| 1599 st->print("siginfo:"); | |
| 1600 st->print(" ExceptionCode=0x%x", er->ExceptionCode); | |
| 1601 | |
| 1602 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && | |
| 1603 er->NumberParameters >= 2) { | |
| 1604 switch (er->ExceptionInformation[0]) { | |
| 1605 case 0: st->print(", reading address"); break; | |
| 1606 case 1: st->print(", writing address"); break; | |
| 1607 default: st->print(", ExceptionInformation=" INTPTR_FORMAT, | |
| 1608 er->ExceptionInformation[0]); | |
| 1609 } | |
| 1610 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); | |
| 1611 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && | |
| 1612 er->NumberParameters >= 2 && UseSharedSpaces) { | |
| 1613 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 1614 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { | |
| 1615 st->print("\n\nError accessing class data sharing archive." \ | |
| 1616 " Mapped file inaccessible during execution, " \ | |
| 1617 " possible disk/network problem."); | |
| 1618 } | |
| 1619 } else { | |
| 1620 int num = er->NumberParameters; | |
| 1621 if (num > 0) { | |
| 1622 st->print(", ExceptionInformation="); | |
| 1623 for (int i = 0; i < num; i++) { | |
| 1624 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); | |
| 1625 } | |
| 1626 } | |
| 1627 } | |
| 1628 st->cr(); | |
| 1629 } | |
| 1630 | |
| 1631 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 1632 // do nothing | |
| 1633 } | |
| 1634 | |
| 1635 static char saved_jvm_path[MAX_PATH] = {0}; | |
| 1636 | |
| 1637 // Find the full path to the current module, jvm.dll or jvm_g.dll | |
| 1638 void os::jvm_path(char *buf, jint buflen) { | |
| 1639 // Error checking. | |
| 1640 if (buflen < MAX_PATH) { | |
| 1641 assert(false, "must use a large-enough buffer"); | |
| 1642 buf[0] = '\0'; | |
| 1643 return; | |
| 1644 } | |
| 1645 // Lazy resolve the path to current module. | |
| 1646 if (saved_jvm_path[0] != 0) { | |
| 1647 strcpy(buf, saved_jvm_path); | |
| 1648 return; | |
| 1649 } | |
| 1650 | |
| 1651 GetModuleFileName(vm_lib_handle, buf, buflen); | |
| 1652 strcpy(saved_jvm_path, buf); | |
| 1653 } | |
| 1654 | |
| 1655 | |
| 1656 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 1657 #ifndef _WIN64 | |
| 1658 st->print("_"); | |
| 1659 #endif | |
| 1660 } | |
| 1661 | |
| 1662 | |
| 1663 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 1664 #ifndef _WIN64 | |
| 1665 st->print("@%d", args_size * sizeof(int)); | |
| 1666 #endif | |
| 1667 } | |
| 1668 | |
| 1669 // sun.misc.Signal | |
| 1670 // NOTE that this is a workaround for an apparent kernel bug where if | |
| 1671 // a signal handler for SIGBREAK is installed then that signal handler | |
| 1672 // takes priority over the console control handler for CTRL_CLOSE_EVENT. | |
| 1673 // See bug 4416763. | |
| 1674 static void (*sigbreakHandler)(int) = NULL; | |
| 1675 | |
| 1676 static void UserHandler(int sig, void *siginfo, void *context) { | |
| 1677 os::signal_notify(sig); | |
| 1678 // We need to reinstate the signal handler each time... | |
| 1679 os::signal(sig, (void*)UserHandler); | |
| 1680 } | |
| 1681 | |
| 1682 void* os::user_handler() { | |
| 1683 return (void*) UserHandler; | |
| 1684 } | |
| 1685 | |
| 1686 void* os::signal(int signal_number, void* handler) { | |
| 1687 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { | |
| 1688 void (*oldHandler)(int) = sigbreakHandler; | |
| 1689 sigbreakHandler = (void (*)(int)) handler; | |
| 1690 return (void*) oldHandler; | |
| 1691 } else { | |
| 1692 return (void*)::signal(signal_number, (void (*)(int))handler); | |
| 1693 } | |
| 1694 } | |
| 1695 | |
| 1696 void os::signal_raise(int signal_number) { | |
| 1697 raise(signal_number); | |
| 1698 } | |
| 1699 | |
| 1700 // The Win32 C runtime library maps all console control events other than ^C | |
| 1701 // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, | |
| 1702 // logoff, and shutdown events. We therefore install our own console handler | |
| 1703 // that raises SIGTERM for the latter cases. | |
| 1704 // | |
| 1705 static BOOL WINAPI consoleHandler(DWORD event) { | |
| 1706 switch(event) { | |
| 1707 case CTRL_C_EVENT: | |
| 1708 if (is_error_reported()) { | |
| 1709 // Ctrl-C is pressed during error reporting, likely because the error | |
| 1710 // handler fails to abort. Let VM die immediately. | |
| 1711 os::die(); | |
| 1712 } | |
| 1713 | |
| 1714 os::signal_raise(SIGINT); | |
| 1715 return TRUE; | |
| 1716 break; | |
| 1717 case CTRL_BREAK_EVENT: | |
| 1718 if (sigbreakHandler != NULL) { | |
| 1719 (*sigbreakHandler)(SIGBREAK); | |
| 1720 } | |
| 1721 return TRUE; | |
| 1722 break; | |
| 1723 case CTRL_CLOSE_EVENT: | |
| 1724 case CTRL_LOGOFF_EVENT: | |
| 1725 case CTRL_SHUTDOWN_EVENT: | |
| 1726 os::signal_raise(SIGTERM); | |
| 1727 return TRUE; | |
| 1728 break; | |
| 1729 default: | |
| 1730 break; | |
| 1731 } | |
| 1732 return FALSE; | |
| 1733 } | |
| 1734 | |
| 1735 /* | |
| 1736 * The following code is moved from os.cpp for making this | |
| 1737 * code platform specific, which it is by its very nature. | |
| 1738 */ | |
| 1739 | |
| 1740 // Return maximum OS signal used + 1 for internal use only | |
| 1741 // Used as exit signal for signal_thread | |
| 1742 int os::sigexitnum_pd(){ | |
| 1743 return NSIG; | |
| 1744 } | |
| 1745 | |
| 1746 // a counter for each possible signal value, including signal_thread exit signal | |
| 1747 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
| 1748 static HANDLE sig_sem; | |
| 1749 | |
| 1750 void os::signal_init_pd() { | |
| 1751 // Initialize signal structures | |
| 1752 memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
| 1753 | |
| 1754 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); | |
| 1755 | |
| 1756 // Programs embedding the VM do not want it to attempt to receive | |
| 1757 // events like CTRL_LOGOFF_EVENT, which are used to implement the | |
| 1758 // shutdown hooks mechanism introduced in 1.3. For example, when | |
| 1759 // the VM is run as part of a Windows NT service (i.e., a servlet | |
| 1760 // engine in a web server), the correct behavior is for any console | |
| 1761 // control handler to return FALSE, not TRUE, because the OS's | |
| 1762 // "final" handler for such events allows the process to continue if | |
| 1763 // it is a service (while terminating it if it is not a service). | |
| 1764 // To make this behavior uniform and the mechanism simpler, we | |
| 1765 // completely disable the VM's usage of these console events if -Xrs | |
| 1766 // (=ReduceSignalUsage) is specified. This means, for example, that | |
| 1767 // the CTRL-BREAK thread dump mechanism is also disabled in this | |
| 1768 // case. See bugs 4323062, 4345157, and related bugs. | |
| 1769 | |
| 1770 if (!ReduceSignalUsage) { | |
| 1771 // Add a CTRL-C handler | |
| 1772 SetConsoleCtrlHandler(consoleHandler, TRUE); | |
| 1773 } | |
| 1774 } | |
| 1775 | |
| 1776 void os::signal_notify(int signal_number) { | |
| 1777 BOOL ret; | |
| 1778 | |
| 1779 Atomic::inc(&pending_signals[signal_number]); | |
| 1780 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); | |
| 1781 assert(ret != 0, "ReleaseSemaphore() failed"); | |
| 1782 } | |
| 1783 | |
| 1784 static int check_pending_signals(bool wait_for_signal) { | |
| 1785 DWORD ret; | |
| 1786 while (true) { | |
| 1787 for (int i = 0; i < NSIG + 1; i++) { | |
| 1788 jint n = pending_signals[i]; | |
| 1789 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 1790 return i; | |
| 1791 } | |
| 1792 } | |
| 1793 if (!wait_for_signal) { | |
| 1794 return -1; | |
| 1795 } | |
| 1796 | |
| 1797 JavaThread *thread = JavaThread::current(); | |
| 1798 | |
| 1799 ThreadBlockInVM tbivm(thread); | |
| 1800 | |
| 1801 bool threadIsSuspended; | |
| 1802 do { | |
| 1803 thread->set_suspend_equivalent(); | |
| 1804 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 1805 ret = ::WaitForSingleObject(sig_sem, INFINITE); | |
| 1806 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); | |
| 1807 | |
| 1808 // were we externally suspended while we were waiting? | |
| 1809 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 1810 if (threadIsSuspended) { | |
| 1811 // | |
| 1812 // The semaphore has been incremented, but while we were waiting | |
| 1813 // another thread suspended us. We don't want to continue running | |
| 1814 // while suspended because that would surprise the thread that | |
| 1815 // suspended us. | |
| 1816 // | |
| 1817 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); | |
| 1818 assert(ret != 0, "ReleaseSemaphore() failed"); | |
| 1819 | |
| 1820 thread->java_suspend_self(); | |
| 1821 } | |
| 1822 } while (threadIsSuspended); | |
| 1823 } | |
| 1824 } | |
| 1825 | |
| 1826 int os::signal_lookup() { | |
| 1827 return check_pending_signals(false); | |
| 1828 } | |
| 1829 | |
| 1830 int os::signal_wait() { | |
| 1831 return check_pending_signals(true); | |
| 1832 } | |
| 1833 | |
| 1834 // Implicit OS exception handling | |
| 1835 | |
| 1836 LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { | |
| 1837 JavaThread* thread = JavaThread::current(); | |
| 1838 // Save pc in thread | |
| 1839 #ifdef _M_IA64 | |
| 1840 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); | |
| 1841 // Set pc to handler | |
| 1842 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; | |
| 1843 #elif _M_AMD64 | |
| 1844 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); | |
| 1845 // Set pc to handler | |
| 1846 exceptionInfo->ContextRecord->Rip = (DWORD64)handler; | |
| 1847 #else | |
| 1848 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); | |
| 1849 // Set pc to handler | |
| 1850 exceptionInfo->ContextRecord->Eip = (LONG)handler; | |
| 1851 #endif | |
| 1852 | |
| 1853 // Continue the execution | |
| 1854 return EXCEPTION_CONTINUE_EXECUTION; | |
| 1855 } | |
| 1856 | |
| 1857 | |
| 1858 // Used for PostMortemDump | |
| 1859 extern "C" void safepoints(); | |
| 1860 extern "C" void find(int x); | |
| 1861 extern "C" void events(); | |
| 1862 | |
| 1863 // According to Windows API documentation, an illegal instruction sequence should generate | |
| 1864 // the 0xC000001C exception code. However, real world experience shows that occasionnaly | |
| 1865 // the execution of an illegal instruction can generate the exception code 0xC000001E. This | |
| 1866 // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). | |
| 1867 | |
| 1868 #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E | |
| 1869 | |
| 1870 // From "Execution Protection in the Windows Operating System" draft 0.35 | |
| 1871 // Once a system header becomes available, the "real" define should be | |
| 1872 // included or copied here. | |
| 1873 #define EXCEPTION_INFO_EXEC_VIOLATION 0x08 | |
| 1874 | |
| 1875 #define def_excpt(val) #val, val | |
| 1876 | |
| 1877 struct siglabel { | |
| 1878 char *name; | |
| 1879 int number; | |
| 1880 }; | |
| 1881 | |
| 1882 struct siglabel exceptlabels[] = { | |
| 1883 def_excpt(EXCEPTION_ACCESS_VIOLATION), | |
| 1884 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), | |
| 1885 def_excpt(EXCEPTION_BREAKPOINT), | |
| 1886 def_excpt(EXCEPTION_SINGLE_STEP), | |
| 1887 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), | |
| 1888 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), | |
| 1889 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), | |
| 1890 def_excpt(EXCEPTION_FLT_INEXACT_RESULT), | |
| 1891 def_excpt(EXCEPTION_FLT_INVALID_OPERATION), | |
| 1892 def_excpt(EXCEPTION_FLT_OVERFLOW), | |
| 1893 def_excpt(EXCEPTION_FLT_STACK_CHECK), | |
| 1894 def_excpt(EXCEPTION_FLT_UNDERFLOW), | |
| 1895 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), | |
| 1896 def_excpt(EXCEPTION_INT_OVERFLOW), | |
| 1897 def_excpt(EXCEPTION_PRIV_INSTRUCTION), | |
| 1898 def_excpt(EXCEPTION_IN_PAGE_ERROR), | |
| 1899 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), | |
| 1900 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), | |
| 1901 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), | |
| 1902 def_excpt(EXCEPTION_STACK_OVERFLOW), | |
| 1903 def_excpt(EXCEPTION_INVALID_DISPOSITION), | |
| 1904 def_excpt(EXCEPTION_GUARD_PAGE), | |
| 1905 def_excpt(EXCEPTION_INVALID_HANDLE), | |
| 1906 NULL, 0 | |
| 1907 }; | |
| 1908 | |
| 1909 const char* os::exception_name(int exception_code, char *buf, size_t size) { | |
| 1910 for (int i = 0; exceptlabels[i].name != NULL; i++) { | |
| 1911 if (exceptlabels[i].number == exception_code) { | |
| 1912 jio_snprintf(buf, size, "%s", exceptlabels[i].name); | |
| 1913 return buf; | |
| 1914 } | |
| 1915 } | |
| 1916 | |
| 1917 return NULL; | |
| 1918 } | |
| 1919 | |
| 1920 //----------------------------------------------------------------------------- | |
| 1921 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
| 1922 // handle exception caused by idiv; should only happen for -MinInt/-1 | |
| 1923 // (division by zero is handled explicitly) | |
| 1924 #ifdef _M_IA64 | |
| 1925 assert(0, "Fix Handle_IDiv_Exception"); | |
| 1926 #elif _M_AMD64 | |
| 1927 PCONTEXT ctx = exceptionInfo->ContextRecord; | |
| 1928 address pc = (address)ctx->Rip; | |
| 1929 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); | |
| 1930 assert(pc[0] == 0xF7, "not an idiv opcode"); | |
| 1931 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); | |
| 1932 assert(ctx->Rax == min_jint, "unexpected idiv exception"); | |
| 1933 // set correct result values and continue after idiv instruction | |
| 1934 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes | |
| 1935 ctx->Rax = (DWORD)min_jint; // result | |
| 1936 ctx->Rdx = (DWORD)0; // remainder | |
| 1937 // Continue the execution | |
| 1938 #else | |
| 1939 PCONTEXT ctx = exceptionInfo->ContextRecord; | |
| 1940 address pc = (address)ctx->Eip; | |
| 1941 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); | |
| 1942 assert(pc[0] == 0xF7, "not an idiv opcode"); | |
| 1943 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); | |
| 1944 assert(ctx->Eax == min_jint, "unexpected idiv exception"); | |
| 1945 // set correct result values and continue after idiv instruction | |
| 1946 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes | |
| 1947 ctx->Eax = (DWORD)min_jint; // result | |
| 1948 ctx->Edx = (DWORD)0; // remainder | |
| 1949 // Continue the execution | |
| 1950 #endif | |
| 1951 return EXCEPTION_CONTINUE_EXECUTION; | |
| 1952 } | |
| 1953 | |
| 1954 #ifndef _WIN64 | |
| 1955 //----------------------------------------------------------------------------- | |
| 1956 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
| 1957 // handle exception caused by native mothod modifying control word | |
| 1958 PCONTEXT ctx = exceptionInfo->ContextRecord; | |
| 1959 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; | |
| 1960 | |
| 1961 switch (exception_code) { | |
| 1962 case EXCEPTION_FLT_DENORMAL_OPERAND: | |
| 1963 case EXCEPTION_FLT_DIVIDE_BY_ZERO: | |
| 1964 case EXCEPTION_FLT_INEXACT_RESULT: | |
| 1965 case EXCEPTION_FLT_INVALID_OPERATION: | |
| 1966 case EXCEPTION_FLT_OVERFLOW: | |
| 1967 case EXCEPTION_FLT_STACK_CHECK: | |
| 1968 case EXCEPTION_FLT_UNDERFLOW: | |
| 1969 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); | |
| 1970 if (fp_control_word != ctx->FloatSave.ControlWord) { | |
| 1971 // Restore FPCW and mask out FLT exceptions | |
| 1972 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; | |
| 1973 // Mask out pending FLT exceptions | |
| 1974 ctx->FloatSave.StatusWord &= 0xffffff00; | |
| 1975 return EXCEPTION_CONTINUE_EXECUTION; | |
| 1976 } | |
| 1977 } | |
| 1978 return EXCEPTION_CONTINUE_SEARCH; | |
| 1979 } | |
| 1980 #else //_WIN64 | |
| 1981 /* | |
| 1982 On Windows, the mxcsr control bits are non-volatile across calls | |
| 1983 See also CR 6192333 | |
| 1984 If EXCEPTION_FLT_* happened after some native method modified | |
| 1985 mxcsr - it is not a jvm fault. | |
| 1986 However should we decide to restore of mxcsr after a faulty | |
| 1987 native method we can uncomment following code | |
| 1988 jint MxCsr = INITIAL_MXCSR; | |
| 1989 // we can't use StubRoutines::addr_mxcsr_std() | |
| 1990 // because in Win64 mxcsr is not saved there | |
| 1991 if (MxCsr != ctx->MxCsr) { | |
| 1992 ctx->MxCsr = MxCsr; | |
| 1993 return EXCEPTION_CONTINUE_EXECUTION; | |
| 1994 } | |
| 1995 | |
| 1996 */ | |
| 1997 #endif //_WIN64 | |
| 1998 | |
| 1999 | |
| 2000 // Fatal error reporting is single threaded so we can make this a | |
| 2001 // static and preallocated. If it's more than MAX_PATH silently ignore | |
| 2002 // it. | |
| 2003 static char saved_error_file[MAX_PATH] = {0}; | |
| 2004 | |
| 2005 void os::set_error_file(const char *logfile) { | |
| 2006 if (strlen(logfile) <= MAX_PATH) { | |
| 2007 strncpy(saved_error_file, logfile, MAX_PATH); | |
| 2008 } | |
| 2009 } | |
| 2010 | |
| 2011 static inline void report_error(Thread* t, DWORD exception_code, | |
| 2012 address addr, void* siginfo, void* context) { | |
| 2013 VMError err(t, exception_code, addr, siginfo, context); | |
| 2014 err.report_and_die(); | |
| 2015 | |
| 2016 // If UseOsErrorReporting, this will return here and save the error file | |
| 2017 // somewhere where we can find it in the minidump. | |
| 2018 } | |
| 2019 | |
| 2020 //----------------------------------------------------------------------------- | |
| 2021 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
| 2022 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; | |
| 2023 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; | |
| 2024 #ifdef _M_IA64 | |
| 2025 address pc = (address) exceptionInfo->ContextRecord->StIIP; | |
| 2026 #elif _M_AMD64 | |
| 2027 address pc = (address) exceptionInfo->ContextRecord->Rip; | |
| 2028 #else | |
| 2029 address pc = (address) exceptionInfo->ContextRecord->Eip; | |
| 2030 #endif | |
| 2031 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady | |
| 2032 | |
| 2033 #ifndef _WIN64 | |
| 2034 // Execution protection violation - win32 running on AMD64 only | |
| 2035 // Handled first to avoid misdiagnosis as a "normal" access violation; | |
| 2036 // This is safe to do because we have a new/unique ExceptionInformation | |
| 2037 // code for this condition. | |
| 2038 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
| 2039 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
| 2040 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; | |
| 2041 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
| 2042 | |
| 2043 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { | |
| 2044 int page_size = os::vm_page_size(); | |
| 2045 | |
| 2046 // Make sure the pc and the faulting address are sane. | |
| 2047 // | |
| 2048 // If an instruction spans a page boundary, and the page containing | |
| 2049 // the beginning of the instruction is executable but the following | |
| 2050 // page is not, the pc and the faulting address might be slightly | |
| 2051 // different - we still want to unguard the 2nd page in this case. | |
| 2052 // | |
| 2053 // 15 bytes seems to be a (very) safe value for max instruction size. | |
| 2054 bool pc_is_near_addr = | |
| 2055 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
| 2056 bool instr_spans_page_boundary = | |
| 2057 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
| 2058 (intptr_t) page_size) > 0); | |
| 2059 | |
| 2060 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
| 2061 static volatile address last_addr = | |
| 2062 (address) os::non_memory_address_word(); | |
| 2063 | |
| 2064 // In conservative mode, don't unguard unless the address is in the VM | |
| 2065 if (UnguardOnExecutionViolation > 0 && addr != last_addr && | |
| 2066 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
| 2067 | |
|
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2068 // Set memory to RWX and retry |
| 0 | 2069 address page_start = |
| 2070 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
|
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|
2071 bool res = os::protect_memory((char*) page_start, page_size, |
|
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2072 os::MEM_PROT_RWX); |
| 0 | 2073 |
| 2074 if (PrintMiscellaneous && Verbose) { | |
| 2075 char buf[256]; | |
| 2076 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
| 2077 "at " INTPTR_FORMAT | |
| 2078 ", unguarding " INTPTR_FORMAT ": %s", addr, | |
| 2079 page_start, (res ? "success" : strerror(errno))); | |
| 2080 tty->print_raw_cr(buf); | |
| 2081 } | |
| 2082 | |
| 2083 // Set last_addr so if we fault again at the same address, we don't | |
| 2084 // end up in an endless loop. | |
| 2085 // | |
| 2086 // There are two potential complications here. Two threads trapping | |
| 2087 // at the same address at the same time could cause one of the | |
| 2088 // threads to think it already unguarded, and abort the VM. Likely | |
| 2089 // very rare. | |
| 2090 // | |
| 2091 // The other race involves two threads alternately trapping at | |
| 2092 // different addresses and failing to unguard the page, resulting in | |
| 2093 // an endless loop. This condition is probably even more unlikely | |
| 2094 // than the first. | |
| 2095 // | |
| 2096 // Although both cases could be avoided by using locks or thread | |
| 2097 // local last_addr, these solutions are unnecessary complication: | |
| 2098 // this handler is a best-effort safety net, not a complete solution. | |
| 2099 // It is disabled by default and should only be used as a workaround | |
| 2100 // in case we missed any no-execute-unsafe VM code. | |
| 2101 | |
| 2102 last_addr = addr; | |
| 2103 | |
| 2104 return EXCEPTION_CONTINUE_EXECUTION; | |
| 2105 } | |
| 2106 } | |
| 2107 | |
| 2108 // Last unguard failed or not unguarding | |
| 2109 tty->print_raw_cr("Execution protection violation"); | |
| 2110 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, | |
| 2111 exceptionInfo->ContextRecord); | |
| 2112 return EXCEPTION_CONTINUE_SEARCH; | |
| 2113 } | |
| 2114 } | |
| 2115 #endif // _WIN64 | |
| 2116 | |
| 2117 // Check to see if we caught the safepoint code in the | |
| 2118 // process of write protecting the memory serialization page. | |
| 2119 // It write enables the page immediately after protecting it | |
| 2120 // so just return. | |
| 2121 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { | |
| 2122 JavaThread* thread = (JavaThread*) t; | |
| 2123 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
| 2124 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
| 2125 if ( os::is_memory_serialize_page(thread, addr) ) { | |
| 2126 // Block current thread until the memory serialize page permission restored. | |
| 2127 os::block_on_serialize_page_trap(); | |
| 2128 return EXCEPTION_CONTINUE_EXECUTION; | |
| 2129 } | |
| 2130 } | |
| 2131 | |
| 2132 | |
| 2133 if (t != NULL && t->is_Java_thread()) { | |
| 2134 JavaThread* thread = (JavaThread*) t; | |
| 2135 bool in_java = thread->thread_state() == _thread_in_Java; | |
| 2136 | |
| 2137 // Handle potential stack overflows up front. | |
| 2138 if (exception_code == EXCEPTION_STACK_OVERFLOW) { | |
| 2139 if (os::uses_stack_guard_pages()) { | |
| 2140 #ifdef _M_IA64 | |
| 2141 // | |
| 2142 // If it's a legal stack address continue, Windows will map it in. | |
| 2143 // | |
| 2144 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
| 2145 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
| 2146 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) | |
| 2147 return EXCEPTION_CONTINUE_EXECUTION; | |
| 2148 | |
| 2149 // The register save area is the same size as the memory stack | |
| 2150 // and starts at the page just above the start of the memory stack. | |
| 2151 // If we get a fault in this area, we've run out of register | |
| 2152 // stack. If we are in java, try throwing a stack overflow exception. | |
| 2153 if (addr > thread->stack_base() && | |
| 2154 addr <= (thread->stack_base()+thread->stack_size()) ) { | |
| 2155 char buf[256]; | |
| 2156 jio_snprintf(buf, sizeof(buf), | |
| 2157 "Register stack overflow, addr:%p, stack_base:%p\n", | |
| 2158 addr, thread->stack_base() ); | |
| 2159 tty->print_raw_cr(buf); | |
| 2160 // If not in java code, return and hope for the best. | |
| 2161 return in_java ? Handle_Exception(exceptionInfo, | |
| 2162 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) | |
| 2163 : EXCEPTION_CONTINUE_EXECUTION; | |
| 2164 } | |
| 2165 #endif | |
| 2166 if (thread->stack_yellow_zone_enabled()) { | |
| 2167 // Yellow zone violation. The o/s has unprotected the first yellow | |
| 2168 // zone page for us. Note: must call disable_stack_yellow_zone to | |
| 2169 // update the enabled status, even if the zone contains only one page. | |
| 2170 thread->disable_stack_yellow_zone(); | |
| 2171 // If not in java code, return and hope for the best. | |
| 2172 return in_java ? Handle_Exception(exceptionInfo, | |
| 2173 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) | |
| 2174 : EXCEPTION_CONTINUE_EXECUTION; | |
| 2175 } else { | |
| 2176 // Fatal red zone violation. | |
| 2177 thread->disable_stack_red_zone(); | |
| 2178 tty->print_raw_cr("An unrecoverable stack overflow has occurred."); | |
| 2179 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
| 2180 exceptionInfo->ContextRecord); | |
| 2181 return EXCEPTION_CONTINUE_SEARCH; | |
| 2182 } | |
| 2183 } else if (in_java) { | |
| 2184 // JVM-managed guard pages cannot be used on win95/98. The o/s provides | |
| 2185 // a one-time-only guard page, which it has released to us. The next | |
| 2186 // stack overflow on this thread will result in an ACCESS_VIOLATION. | |
| 2187 return Handle_Exception(exceptionInfo, | |
| 2188 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); | |
| 2189 } else { | |
| 2190 // Can only return and hope for the best. Further stack growth will | |
| 2191 // result in an ACCESS_VIOLATION. | |
| 2192 return EXCEPTION_CONTINUE_EXECUTION; | |
| 2193 } | |
| 2194 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
| 2195 // Either stack overflow or null pointer exception. | |
| 2196 if (in_java) { | |
| 2197 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
| 2198 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
| 2199 address stack_end = thread->stack_base() - thread->stack_size(); | |
| 2200 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { | |
| 2201 // Stack overflow. | |
| 2202 assert(!os::uses_stack_guard_pages(), | |
| 2203 "should be caught by red zone code above."); | |
| 2204 return Handle_Exception(exceptionInfo, | |
| 2205 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); | |
| 2206 } | |
| 2207 // | |
| 2208 // Check for safepoint polling and implicit null | |
| 2209 // We only expect null pointers in the stubs (vtable) | |
| 2210 // the rest are checked explicitly now. | |
| 2211 // | |
| 2212 CodeBlob* cb = CodeCache::find_blob(pc); | |
| 2213 if (cb != NULL) { | |
| 2214 if (os::is_poll_address(addr)) { | |
| 2215 address stub = SharedRuntime::get_poll_stub(pc); | |
| 2216 return Handle_Exception(exceptionInfo, stub); | |
| 2217 } | |
| 2218 } | |
| 2219 { | |
| 2220 #ifdef _WIN64 | |
| 2221 // | |
| 2222 // If it's a legal stack address map the entire region in | |
| 2223 // | |
| 2224 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
| 2225 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
| 2226 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { | |
| 2227 addr = (address)((uintptr_t)addr & | |
| 2228 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); | |
| 656 | 2229 os::commit_memory((char *)addr, thread->stack_base() - addr, |
| 2230 false ); | |
| 0 | 2231 return EXCEPTION_CONTINUE_EXECUTION; |
| 2232 } | |
| 2233 else | |
| 2234 #endif | |
| 2235 { | |
| 2236 // Null pointer exception. | |
| 2237 #ifdef _M_IA64 | |
| 2238 // We catch register stack overflows in compiled code by doing | |
| 2239 // an explicit compare and executing a st8(G0, G0) if the | |
| 2240 // BSP enters into our guard area. We test for the overflow | |
| 2241 // condition and fall into the normal null pointer exception | |
| 2242 // code if BSP hasn't overflowed. | |
| 2243 if ( in_java ) { | |
| 2244 if(thread->register_stack_overflow()) { | |
| 2245 assert((address)exceptionInfo->ContextRecord->IntS3 == | |
| 2246 thread->register_stack_limit(), | |
| 2247 "GR7 doesn't contain register_stack_limit"); | |
| 2248 // Disable the yellow zone which sets the state that | |
| 2249 // we've got a stack overflow problem. | |
| 2250 if (thread->stack_yellow_zone_enabled()) { | |
| 2251 thread->disable_stack_yellow_zone(); | |
| 2252 } | |
| 2253 // Give us some room to process the exception | |
| 2254 thread->disable_register_stack_guard(); | |
| 2255 // Update GR7 with the new limit so we can continue running | |
| 2256 // compiled code. | |
| 2257 exceptionInfo->ContextRecord->IntS3 = | |
| 2258 (ULONGLONG)thread->register_stack_limit(); | |
| 2259 return Handle_Exception(exceptionInfo, | |
| 2260 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); | |
| 2261 } else { | |
| 2262 // | |
| 2263 // Check for implicit null | |
| 2264 // We only expect null pointers in the stubs (vtable) | |
| 2265 // the rest are checked explicitly now. | |
| 2266 // | |
|
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2267 if (((uintptr_t)addr) < os::vm_page_size() ) { |
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2268 // an access to the first page of VM--assume it is a null pointer |
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2269 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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2270 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); |
| 0 | 2271 } |
| 2272 } | |
| 2273 } // in_java | |
| 2274 | |
| 2275 // IA64 doesn't use implicit null checking yet. So we shouldn't | |
| 2276 // get here. | |
| 2277 tty->print_raw_cr("Access violation, possible null pointer exception"); | |
| 2278 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
| 2279 exceptionInfo->ContextRecord); | |
| 2280 return EXCEPTION_CONTINUE_SEARCH; | |
| 2281 #else /* !IA64 */ | |
| 2282 | |
| 2283 // Windows 98 reports faulting addresses incorrectly | |
| 2284 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || | |
| 2285 !os::win32::is_nt()) { | |
|
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2286 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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2287 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); |
| 0 | 2288 } |
| 2289 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
| 2290 exceptionInfo->ContextRecord); | |
| 2291 return EXCEPTION_CONTINUE_SEARCH; | |
| 2292 #endif | |
| 2293 } | |
| 2294 } | |
| 2295 } | |
| 2296 | |
| 2297 #ifdef _WIN64 | |
| 2298 // Special care for fast JNI field accessors. | |
| 2299 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks | |
| 2300 // in and the heap gets shrunk before the field access. | |
| 2301 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
| 2302 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
| 2303 if (addr != (address)-1) { | |
| 2304 return Handle_Exception(exceptionInfo, addr); | |
| 2305 } | |
| 2306 } | |
| 2307 #endif | |
| 2308 | |
| 2309 #ifdef _WIN64 | |
| 2310 // Windows will sometimes generate an access violation | |
| 2311 // when we call malloc. Since we use VectoredExceptions | |
| 2312 // on 64 bit platforms, we see this exception. We must | |
| 2313 // pass this exception on so Windows can recover. | |
| 2314 // We check to see if the pc of the fault is in NTDLL.DLL | |
| 2315 // if so, we pass control on to Windows for handling. | |
| 2316 if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH; | |
| 2317 #endif | |
| 2318 | |
| 2319 // Stack overflow or null pointer exception in native code. | |
| 2320 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
| 2321 exceptionInfo->ContextRecord); | |
| 2322 return EXCEPTION_CONTINUE_SEARCH; | |
| 2323 } | |
| 2324 | |
| 2325 if (in_java) { | |
| 2326 switch (exception_code) { | |
| 2327 case EXCEPTION_INT_DIVIDE_BY_ZERO: | |
| 2328 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); | |
| 2329 | |
| 2330 case EXCEPTION_INT_OVERFLOW: | |
| 2331 return Handle_IDiv_Exception(exceptionInfo); | |
| 2332 | |
| 2333 } // switch | |
| 2334 } | |
| 2335 #ifndef _WIN64 | |
| 2336 if ((thread->thread_state() == _thread_in_Java) || | |
| 2337 (thread->thread_state() == _thread_in_native) ) | |
| 2338 { | |
| 2339 LONG result=Handle_FLT_Exception(exceptionInfo); | |
| 2340 if (result==EXCEPTION_CONTINUE_EXECUTION) return result; | |
| 2341 } | |
| 2342 #endif //_WIN64 | |
| 2343 } | |
| 2344 | |
| 2345 if (exception_code != EXCEPTION_BREAKPOINT) { | |
| 2346 #ifndef _WIN64 | |
| 2347 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
| 2348 exceptionInfo->ContextRecord); | |
| 2349 #else | |
| 2350 // Itanium Windows uses a VectoredExceptionHandler | |
| 2351 // Which means that C++ programatic exception handlers (try/except) | |
| 2352 // will get here. Continue the search for the right except block if | |
| 2353 // the exception code is not a fatal code. | |
| 2354 switch ( exception_code ) { | |
| 2355 case EXCEPTION_ACCESS_VIOLATION: | |
| 2356 case EXCEPTION_STACK_OVERFLOW: | |
| 2357 case EXCEPTION_ILLEGAL_INSTRUCTION: | |
| 2358 case EXCEPTION_ILLEGAL_INSTRUCTION_2: | |
| 2359 case EXCEPTION_INT_OVERFLOW: | |
| 2360 case EXCEPTION_INT_DIVIDE_BY_ZERO: | |
| 2361 { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
| 2362 exceptionInfo->ContextRecord); | |
| 2363 } | |
| 2364 break; | |
| 2365 default: | |
| 2366 break; | |
| 2367 } | |
| 2368 #endif | |
| 2369 } | |
| 2370 return EXCEPTION_CONTINUE_SEARCH; | |
| 2371 } | |
| 2372 | |
| 2373 #ifndef _WIN64 | |
| 2374 // Special care for fast JNI accessors. | |
| 2375 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and | |
| 2376 // the heap gets shrunk before the field access. | |
| 2377 // Need to install our own structured exception handler since native code may | |
| 2378 // install its own. | |
| 2379 LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
| 2380 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; | |
| 2381 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
| 2382 address pc = (address) exceptionInfo->ContextRecord->Eip; | |
| 2383 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
| 2384 if (addr != (address)-1) { | |
| 2385 return Handle_Exception(exceptionInfo, addr); | |
| 2386 } | |
| 2387 } | |
| 2388 return EXCEPTION_CONTINUE_SEARCH; | |
| 2389 } | |
| 2390 | |
| 2391 #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ | |
| 2392 Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ | |
| 2393 __try { \ | |
| 2394 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ | |
| 2395 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ | |
| 2396 } \ | |
| 2397 return 0; \ | |
| 2398 } | |
| 2399 | |
| 2400 DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) | |
| 2401 DEFINE_FAST_GETFIELD(jbyte, byte, Byte) | |
| 2402 DEFINE_FAST_GETFIELD(jchar, char, Char) | |
| 2403 DEFINE_FAST_GETFIELD(jshort, short, Short) | |
| 2404 DEFINE_FAST_GETFIELD(jint, int, Int) | |
| 2405 DEFINE_FAST_GETFIELD(jlong, long, Long) | |
| 2406 DEFINE_FAST_GETFIELD(jfloat, float, Float) | |
| 2407 DEFINE_FAST_GETFIELD(jdouble, double, Double) | |
| 2408 | |
| 2409 address os::win32::fast_jni_accessor_wrapper(BasicType type) { | |
| 2410 switch (type) { | |
| 2411 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; | |
| 2412 case T_BYTE: return (address)jni_fast_GetByteField_wrapper; | |
| 2413 case T_CHAR: return (address)jni_fast_GetCharField_wrapper; | |
| 2414 case T_SHORT: return (address)jni_fast_GetShortField_wrapper; | |
| 2415 case T_INT: return (address)jni_fast_GetIntField_wrapper; | |
| 2416 case T_LONG: return (address)jni_fast_GetLongField_wrapper; | |
| 2417 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; | |
| 2418 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; | |
| 2419 default: ShouldNotReachHere(); | |
| 2420 } | |
| 2421 return (address)-1; | |
| 2422 } | |
| 2423 #endif | |
| 2424 | |
| 2425 // Virtual Memory | |
| 2426 | |
| 2427 int os::vm_page_size() { return os::win32::vm_page_size(); } | |
| 2428 int os::vm_allocation_granularity() { | |
| 2429 return os::win32::vm_allocation_granularity(); | |
| 2430 } | |
| 2431 | |
| 2432 // Windows large page support is available on Windows 2003. In order to use | |
| 2433 // large page memory, the administrator must first assign additional privilege | |
| 2434 // to the user: | |
| 2435 // + select Control Panel -> Administrative Tools -> Local Security Policy | |
| 2436 // + select Local Policies -> User Rights Assignment | |
| 2437 // + double click "Lock pages in memory", add users and/or groups | |
| 2438 // + reboot | |
| 2439 // Note the above steps are needed for administrator as well, as administrators | |
| 2440 // by default do not have the privilege to lock pages in memory. | |
| 2441 // | |
| 2442 // Note about Windows 2003: although the API supports committing large page | |
| 2443 // memory on a page-by-page basis and VirtualAlloc() returns success under this | |
| 2444 // scenario, I found through experiment it only uses large page if the entire | |
| 2445 // memory region is reserved and committed in a single VirtualAlloc() call. | |
| 2446 // This makes Windows large page support more or less like Solaris ISM, in | |
| 2447 // that the entire heap must be committed upfront. This probably will change | |
| 2448 // in the future, if so the code below needs to be revisited. | |
| 2449 | |
| 2450 #ifndef MEM_LARGE_PAGES | |
| 2451 #define MEM_LARGE_PAGES 0x20000000 | |
| 2452 #endif | |
| 2453 | |
| 2454 // GetLargePageMinimum is only available on Windows 2003. The other functions | |
| 2455 // are available on NT but not on Windows 98/Me. We have to resolve them at | |
| 2456 // runtime. | |
| 2457 typedef SIZE_T (WINAPI *GetLargePageMinimum_func_type) (void); | |
| 2458 typedef BOOL (WINAPI *AdjustTokenPrivileges_func_type) | |
| 2459 (HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); | |
| 2460 typedef BOOL (WINAPI *OpenProcessToken_func_type) (HANDLE, DWORD, PHANDLE); | |
| 2461 typedef BOOL (WINAPI *LookupPrivilegeValue_func_type) (LPCTSTR, LPCTSTR, PLUID); | |
| 2462 | |
| 2463 static GetLargePageMinimum_func_type _GetLargePageMinimum; | |
| 2464 static AdjustTokenPrivileges_func_type _AdjustTokenPrivileges; | |
| 2465 static OpenProcessToken_func_type _OpenProcessToken; | |
| 2466 static LookupPrivilegeValue_func_type _LookupPrivilegeValue; | |
| 2467 | |
| 2468 static HINSTANCE _kernel32; | |
| 2469 static HINSTANCE _advapi32; | |
| 2470 static HANDLE _hProcess; | |
| 2471 static HANDLE _hToken; | |
| 2472 | |
| 2473 static size_t _large_page_size = 0; | |
| 2474 | |
| 2475 static bool resolve_functions_for_large_page_init() { | |
| 2476 _kernel32 = LoadLibrary("kernel32.dll"); | |
| 2477 if (_kernel32 == NULL) return false; | |
| 2478 | |
| 2479 _GetLargePageMinimum = CAST_TO_FN_PTR(GetLargePageMinimum_func_type, | |
| 2480 GetProcAddress(_kernel32, "GetLargePageMinimum")); | |
| 2481 if (_GetLargePageMinimum == NULL) return false; | |
| 2482 | |
| 2483 _advapi32 = LoadLibrary("advapi32.dll"); | |
| 2484 if (_advapi32 == NULL) return false; | |
| 2485 | |
| 2486 _AdjustTokenPrivileges = CAST_TO_FN_PTR(AdjustTokenPrivileges_func_type, | |
| 2487 GetProcAddress(_advapi32, "AdjustTokenPrivileges")); | |
| 2488 _OpenProcessToken = CAST_TO_FN_PTR(OpenProcessToken_func_type, | |
| 2489 GetProcAddress(_advapi32, "OpenProcessToken")); | |
| 2490 _LookupPrivilegeValue = CAST_TO_FN_PTR(LookupPrivilegeValue_func_type, | |
| 2491 GetProcAddress(_advapi32, "LookupPrivilegeValueA")); | |
| 2492 return _AdjustTokenPrivileges != NULL && | |
| 2493 _OpenProcessToken != NULL && | |
| 2494 _LookupPrivilegeValue != NULL; | |
| 2495 } | |
| 2496 | |
| 2497 static bool request_lock_memory_privilege() { | |
| 2498 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, | |
| 2499 os::current_process_id()); | |
| 2500 | |
| 2501 LUID luid; | |
| 2502 if (_hProcess != NULL && | |
| 2503 _OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && | |
| 2504 _LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { | |
| 2505 | |
| 2506 TOKEN_PRIVILEGES tp; | |
| 2507 tp.PrivilegeCount = 1; | |
| 2508 tp.Privileges[0].Luid = luid; | |
| 2509 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; | |
| 2510 | |
| 2511 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the | |
| 2512 // privilege. Check GetLastError() too. See MSDN document. | |
| 2513 if (_AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && | |
| 2514 (GetLastError() == ERROR_SUCCESS)) { | |
| 2515 return true; | |
| 2516 } | |
| 2517 } | |
| 2518 | |
| 2519 return false; | |
| 2520 } | |
| 2521 | |
| 2522 static void cleanup_after_large_page_init() { | |
| 2523 _GetLargePageMinimum = NULL; | |
| 2524 _AdjustTokenPrivileges = NULL; | |
| 2525 _OpenProcessToken = NULL; | |
| 2526 _LookupPrivilegeValue = NULL; | |
| 2527 if (_kernel32) FreeLibrary(_kernel32); | |
| 2528 _kernel32 = NULL; | |
| 2529 if (_advapi32) FreeLibrary(_advapi32); | |
| 2530 _advapi32 = NULL; | |
| 2531 if (_hProcess) CloseHandle(_hProcess); | |
| 2532 _hProcess = NULL; | |
| 2533 if (_hToken) CloseHandle(_hToken); | |
| 2534 _hToken = NULL; | |
| 2535 } | |
| 2536 | |
| 2537 bool os::large_page_init() { | |
| 2538 if (!UseLargePages) return false; | |
| 2539 | |
| 2540 // print a warning if any large page related flag is specified on command line | |
| 2541 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || | |
| 2542 !FLAG_IS_DEFAULT(LargePageSizeInBytes); | |
| 2543 bool success = false; | |
| 2544 | |
| 2545 # define WARN(msg) if (warn_on_failure) { warning(msg); } | |
| 2546 if (resolve_functions_for_large_page_init()) { | |
| 2547 if (request_lock_memory_privilege()) { | |
| 2548 size_t s = _GetLargePageMinimum(); | |
| 2549 if (s) { | |
| 2550 #if defined(IA32) || defined(AMD64) | |
| 2551 if (s > 4*M || LargePageSizeInBytes > 4*M) { | |
| 2552 WARN("JVM cannot use large pages bigger than 4mb."); | |
| 2553 } else { | |
| 2554 #endif | |
| 2555 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { | |
| 2556 _large_page_size = LargePageSizeInBytes; | |
| 2557 } else { | |
| 2558 _large_page_size = s; | |
| 2559 } | |
| 2560 success = true; | |
| 2561 #if defined(IA32) || defined(AMD64) | |
| 2562 } | |
| 2563 #endif | |
| 2564 } else { | |
| 2565 WARN("Large page is not supported by the processor."); | |
| 2566 } | |
| 2567 } else { | |
| 2568 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); | |
| 2569 } | |
| 2570 } else { | |
| 2571 WARN("Large page is not supported by the operating system."); | |
| 2572 } | |
| 2573 #undef WARN | |
| 2574 | |
| 2575 const size_t default_page_size = (size_t) vm_page_size(); | |
| 2576 if (success && _large_page_size > default_page_size) { | |
| 2577 _page_sizes[0] = _large_page_size; | |
| 2578 _page_sizes[1] = default_page_size; | |
| 2579 _page_sizes[2] = 0; | |
| 2580 } | |
| 2581 | |
| 2582 cleanup_after_large_page_init(); | |
| 2583 return success; | |
| 2584 } | |
| 2585 | |
| 2586 // On win32, one cannot release just a part of reserved memory, it's an | |
| 2587 // all or nothing deal. When we split a reservation, we must break the | |
| 2588 // reservation into two reservations. | |
| 2589 void os::split_reserved_memory(char *base, size_t size, size_t split, | |
| 2590 bool realloc) { | |
| 2591 if (size > 0) { | |
| 2592 release_memory(base, size); | |
| 2593 if (realloc) { | |
| 2594 reserve_memory(split, base); | |
| 2595 } | |
| 2596 if (size != split) { | |
| 2597 reserve_memory(size - split, base + split); | |
| 2598 } | |
| 2599 } | |
| 2600 } | |
| 2601 | |
| 2602 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { | |
| 2603 assert((size_t)addr % os::vm_allocation_granularity() == 0, | |
| 2604 "reserve alignment"); | |
| 2605 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); | |
| 656 | 2606 char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); |
| 0 | 2607 assert(res == NULL || addr == NULL || addr == res, |
| 2608 "Unexpected address from reserve."); | |
| 2609 return res; | |
| 2610 } | |
| 2611 | |
| 2612 // Reserve memory at an arbitrary address, only if that area is | |
| 2613 // available (and not reserved for something else). | |
| 2614 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { | |
| 2615 // Windows os::reserve_memory() fails of the requested address range is | |
| 2616 // not avilable. | |
| 2617 return reserve_memory(bytes, requested_addr); | |
| 2618 } | |
| 2619 | |
| 2620 size_t os::large_page_size() { | |
| 2621 return _large_page_size; | |
| 2622 } | |
| 2623 | |
| 2624 bool os::can_commit_large_page_memory() { | |
| 2625 // Windows only uses large page memory when the entire region is reserved | |
| 2626 // and committed in a single VirtualAlloc() call. This may change in the | |
| 2627 // future, but with Windows 2003 it's not possible to commit on demand. | |
| 2628 return false; | |
| 2629 } | |
| 2630 | |
|
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2631 bool os::can_execute_large_page_memory() { |
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2632 return true; |
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2633 } |
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2634 |
| 656 | 2635 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { |
|
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2636 |
| 717 | 2637 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
| 2638 | |
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2639 if (UseLargePagesIndividualAllocation) { |
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2640 if (TracePageSizes && Verbose) { |
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2641 tty->print_cr("Reserving large pages individually."); |
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2642 } |
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2643 char * p_buf; |
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2644 // first reserve enough address space in advance since we want to be |
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2645 // able to break a single contiguous virtual address range into multiple |
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2646 // large page commits but WS2003 does not allow reserving large page space |
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2647 // so we just use 4K pages for reserve, this gives us a legal contiguous |
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2648 // address space. then we will deallocate that reservation, and re alloc |
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2649 // using large pages |
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2650 const size_t size_of_reserve = bytes + _large_page_size; |
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2651 if (bytes > size_of_reserve) { |
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2652 // Overflowed. |
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2653 warning("Individually allocated large pages failed, " |
|
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2654 "use -XX:-UseLargePagesIndividualAllocation to turn off"); |
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2655 return NULL; |
|
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2656 } |
|
642
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2657 p_buf = (char *) VirtualAlloc(addr, |
|
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2658 size_of_reserve, // size of Reserve |
|
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2659 MEM_RESERVE, |
| 656 | 2660 PAGE_READWRITE); |
|
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2661 // If reservation failed, return NULL |
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2662 if (p_buf == NULL) return NULL; |
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2663 |
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2664 release_memory(p_buf, bytes + _large_page_size); |
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2665 // round up to page boundary. If the size_of_reserve did not |
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2666 // overflow and the reservation did not fail, this align up |
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2667 // should not overflow. |
|
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2668 p_buf = (char *) align_size_up((size_t)p_buf, _large_page_size); |
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2669 |
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2670 // now go through and allocate one page at a time until all bytes are |
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2671 // allocated |
|
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2672 size_t bytes_remaining = align_size_up(bytes, _large_page_size); |
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2673 // An overflow of align_size_up() would have been caught above |
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2674 // in the calculation of size_of_reserve. |
|
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2675 char * next_alloc_addr = p_buf; |
|
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2676 |
|
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2677 #ifdef ASSERT |
|
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2678 // Variable for the failure injection |
|
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2679 long ran_num = os::random(); |
|
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2680 size_t fail_after = ran_num % bytes; |
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2681 #endif |
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2682 |
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2683 while (bytes_remaining) { |
|
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2684 size_t bytes_to_rq = MIN2(bytes_remaining, _large_page_size); |
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2685 // Note allocate and commit |
|
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2686 char * p_new; |
|
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2687 |
|
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2688 #ifdef ASSERT |
|
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2689 bool inject_error = LargePagesIndividualAllocationInjectError && |
|
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2690 (bytes_remaining <= fail_after); |
|
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2691 #else |
|
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2692 const bool inject_error = false; |
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2693 #endif |
|
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2694 |
|
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2695 if (inject_error) { |
|
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2696 p_new = NULL; |
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2697 } else { |
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2698 p_new = (char *) VirtualAlloc(next_alloc_addr, |
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2699 bytes_to_rq, |
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2700 MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES, |
| 717 | 2701 prot); |
|
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2702 } |
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2703 |
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2704 if (p_new == NULL) { |
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2705 // Free any allocated pages |
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2706 if (next_alloc_addr > p_buf) { |
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2707 // Some memory was committed so release it. |
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2708 size_t bytes_to_release = bytes - bytes_remaining; |
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2709 release_memory(p_buf, bytes_to_release); |
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2710 } |
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2711 #ifdef ASSERT |
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2712 if (UseLargePagesIndividualAllocation && |
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2713 LargePagesIndividualAllocationInjectError) { |
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2714 if (TracePageSizes && Verbose) { |
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2715 tty->print_cr("Reserving large pages individually failed."); |
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2716 } |
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2717 } |
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2718 #endif |
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2719 return NULL; |
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2720 } |
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2721 bytes_remaining -= bytes_to_rq; |
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2722 next_alloc_addr += bytes_to_rq; |
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2723 } |
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2724 |
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2725 return p_buf; |
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2726 |
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2727 } else { |
|
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2728 // normal policy just allocate it all at once |
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2729 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; |
| 717 | 2730 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); |
|
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2731 return res; |
|
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2732 } |
| 0 | 2733 } |
| 2734 | |
| 2735 bool os::release_memory_special(char* base, size_t bytes) { | |
| 2736 return release_memory(base, bytes); | |
| 2737 } | |
| 2738 | |
| 2739 void os::print_statistics() { | |
| 2740 } | |
| 2741 | |
| 656 | 2742 bool os::commit_memory(char* addr, size_t bytes, bool exec) { |
| 0 | 2743 if (bytes == 0) { |
| 2744 // Don't bother the OS with noops. | |
| 2745 return true; | |
| 2746 } | |
| 2747 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); | |
| 2748 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); | |
| 2749 // Don't attempt to print anything if the OS call fails. We're | |
| 2750 // probably low on resources, so the print itself may cause crashes. | |
| 656 | 2751 bool result = VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) != 0; |
| 2752 if (result != NULL && exec) { | |
| 2753 DWORD oldprot; | |
| 2754 // Windows doc says to use VirtualProtect to get execute permissions | |
| 2755 return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot) != 0; | |
| 2756 } else { | |
| 2757 return result; | |
| 2758 } | |
| 0 | 2759 } |
| 2760 | |
| 656 | 2761 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, |
| 2762 bool exec) { | |
| 2763 return commit_memory(addr, size, exec); | |
| 0 | 2764 } |
| 2765 | |
| 2766 bool os::uncommit_memory(char* addr, size_t bytes) { | |
| 2767 if (bytes == 0) { | |
| 2768 // Don't bother the OS with noops. | |
| 2769 return true; | |
| 2770 } | |
| 2771 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); | |
| 2772 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); | |
| 2773 return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0; | |
| 2774 } | |
| 2775 | |
| 2776 bool os::release_memory(char* addr, size_t bytes) { | |
| 2777 return VirtualFree(addr, 0, MEM_RELEASE) != 0; | |
| 2778 } | |
| 2779 | |
|
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2780 // Set protections specified |
|
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2781 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
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2782 bool is_committed) { |
|
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2783 unsigned int p = 0; |
|
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2784 switch (prot) { |
|
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2785 case MEM_PROT_NONE: p = PAGE_NOACCESS; break; |
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2786 case MEM_PROT_READ: p = PAGE_READONLY; break; |
|
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2787 case MEM_PROT_RW: p = PAGE_READWRITE; break; |
|
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2788 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; |
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2789 default: |
|
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2790 ShouldNotReachHere(); |
|
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2791 } |
|
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2792 |
| 0 | 2793 DWORD old_status; |
|
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2794 |
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2795 // Strange enough, but on Win32 one can change protection only for committed |
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2796 // memory, not a big deal anyway, as bytes less or equal than 64K |
| 656 | 2797 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { |
|
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2798 fatal("cannot commit protection page"); |
|
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|
2799 } |
|
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2800 // One cannot use os::guard_memory() here, as on Win32 guard page |
|
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2801 // have different (one-shot) semantics, from MSDN on PAGE_GUARD: |
|
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2802 // |
|
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2803 // Pages in the region become guard pages. Any attempt to access a guard page |
|
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2804 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off |
|
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2805 // the guard page status. Guard pages thus act as a one-time access alarm. |
|
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2806 return VirtualProtect(addr, bytes, p, &old_status) != 0; |
| 0 | 2807 } |
| 2808 | |
| 2809 bool os::guard_memory(char* addr, size_t bytes) { | |
| 2810 DWORD old_status; | |
|
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|
2811 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; |
| 0 | 2812 } |
| 2813 | |
| 2814 bool os::unguard_memory(char* addr, size_t bytes) { | |
| 2815 DWORD old_status; | |
|
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|
2816 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; |
| 0 | 2817 } |
| 2818 | |
| 2819 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } | |
| 2820 void os::free_memory(char *addr, size_t bytes) { } | |
| 2821 void os::numa_make_global(char *addr, size_t bytes) { } | |
| 141 | 2822 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } |
| 0 | 2823 bool os::numa_topology_changed() { return false; } |
| 2824 size_t os::numa_get_groups_num() { return 1; } | |
| 2825 int os::numa_get_group_id() { return 0; } | |
| 2826 size_t os::numa_get_leaf_groups(int *ids, size_t size) { | |
| 2827 if (size > 0) { | |
| 2828 ids[0] = 0; | |
| 2829 return 1; | |
| 2830 } | |
| 2831 return 0; | |
| 2832 } | |
| 2833 | |
| 2834 bool os::get_page_info(char *start, page_info* info) { | |
| 2835 return false; | |
| 2836 } | |
| 2837 | |
| 2838 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2839 return end; | |
| 2840 } | |
| 2841 | |
| 2842 char* os::non_memory_address_word() { | |
| 2843 // Must never look like an address returned by reserve_memory, | |
| 2844 // even in its subfields (as defined by the CPU immediate fields, | |
| 2845 // if the CPU splits constants across multiple instructions). | |
| 2846 return (char*)-1; | |
| 2847 } | |
| 2848 | |
| 2849 #define MAX_ERROR_COUNT 100 | |
| 2850 #define SYS_THREAD_ERROR 0xffffffffUL | |
| 2851 | |
| 2852 void os::pd_start_thread(Thread* thread) { | |
| 2853 DWORD ret = ResumeThread(thread->osthread()->thread_handle()); | |
| 2854 // Returns previous suspend state: | |
| 2855 // 0: Thread was not suspended | |
| 2856 // 1: Thread is running now | |
| 2857 // >1: Thread is still suspended. | |
| 2858 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back | |
| 2859 } | |
| 2860 | |
| 2861 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 2862 return ::read(fd, buf, nBytes); | |
| 2863 } | |
| 2864 | |
| 2865 class HighResolutionInterval { | |
| 2866 // The default timer resolution seems to be 10 milliseconds. | |
| 2867 // (Where is this written down?) | |
| 2868 // If someone wants to sleep for only a fraction of the default, | |
| 2869 // then we set the timer resolution down to 1 millisecond for | |
| 2870 // the duration of their interval. | |
| 2871 // We carefully set the resolution back, since otherwise we | |
| 2872 // seem to incur an overhead (3%?) that we don't need. | |
| 2873 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. | |
| 2874 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). | |
| 2875 // Alternatively, we could compute the relative error (503/500 = .6%) and only use | |
| 2876 // timeBeginPeriod() if the relative error exceeded some threshold. | |
| 2877 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and | |
| 2878 // to decreased efficiency related to increased timer "tick" rates. We want to minimize | |
| 2879 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high | |
| 2880 // resolution timers running. | |
| 2881 private: | |
| 2882 jlong resolution; | |
| 2883 public: | |
| 2884 HighResolutionInterval(jlong ms) { | |
| 2885 resolution = ms % 10L; | |
| 2886 if (resolution != 0) { | |
| 2887 MMRESULT result = timeBeginPeriod(1L); | |
| 2888 } | |
| 2889 } | |
| 2890 ~HighResolutionInterval() { | |
| 2891 if (resolution != 0) { | |
| 2892 MMRESULT result = timeEndPeriod(1L); | |
| 2893 } | |
| 2894 resolution = 0L; | |
| 2895 } | |
| 2896 }; | |
| 2897 | |
| 2898 int os::sleep(Thread* thread, jlong ms, bool interruptable) { | |
| 2899 jlong limit = (jlong) MAXDWORD; | |
| 2900 | |
| 2901 while(ms > limit) { | |
| 2902 int res; | |
| 2903 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) | |
| 2904 return res; | |
| 2905 ms -= limit; | |
| 2906 } | |
| 2907 | |
| 2908 assert(thread == Thread::current(), "thread consistency check"); | |
| 2909 OSThread* osthread = thread->osthread(); | |
| 2910 OSThreadWaitState osts(osthread, false /* not Object.wait() */); | |
| 2911 int result; | |
| 2912 if (interruptable) { | |
| 2913 assert(thread->is_Java_thread(), "must be java thread"); | |
| 2914 JavaThread *jt = (JavaThread *) thread; | |
| 2915 ThreadBlockInVM tbivm(jt); | |
| 2916 | |
| 2917 jt->set_suspend_equivalent(); | |
| 2918 // cleared by handle_special_suspend_equivalent_condition() or | |
| 2919 // java_suspend_self() via check_and_wait_while_suspended() | |
| 2920 | |
| 2921 HANDLE events[1]; | |
| 2922 events[0] = osthread->interrupt_event(); | |
| 2923 HighResolutionInterval *phri=NULL; | |
| 2924 if(!ForceTimeHighResolution) | |
| 2925 phri = new HighResolutionInterval( ms ); | |
| 2926 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { | |
| 2927 result = OS_TIMEOUT; | |
| 2928 } else { | |
| 2929 ResetEvent(osthread->interrupt_event()); | |
| 2930 osthread->set_interrupted(false); | |
| 2931 result = OS_INTRPT; | |
| 2932 } | |
| 2933 delete phri; //if it is NULL, harmless | |
| 2934 | |
| 2935 // were we externally suspended while we were waiting? | |
| 2936 jt->check_and_wait_while_suspended(); | |
| 2937 } else { | |
| 2938 assert(!thread->is_Java_thread(), "must not be java thread"); | |
| 2939 Sleep((long) ms); | |
| 2940 result = OS_TIMEOUT; | |
| 2941 } | |
| 2942 return result; | |
| 2943 } | |
| 2944 | |
| 2945 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 2946 void os::infinite_sleep() { | |
| 2947 while (true) { // sleep forever ... | |
| 2948 Sleep(100000); // ... 100 seconds at a time | |
| 2949 } | |
| 2950 } | |
| 2951 | |
| 2952 typedef BOOL (WINAPI * STTSignature)(void) ; | |
| 2953 | |
| 2954 os::YieldResult os::NakedYield() { | |
| 2955 // Use either SwitchToThread() or Sleep(0) | |
| 2956 // Consider passing back the return value from SwitchToThread(). | |
| 2957 // We use GetProcAddress() as ancient Win9X versions of windows doen't support SwitchToThread. | |
| 2958 // In that case we revert to Sleep(0). | |
| 2959 static volatile STTSignature stt = (STTSignature) 1 ; | |
| 2960 | |
| 2961 if (stt == ((STTSignature) 1)) { | |
| 2962 stt = (STTSignature) ::GetProcAddress (LoadLibrary ("Kernel32.dll"), "SwitchToThread") ; | |
| 2963 // It's OK if threads race during initialization as the operation above is idempotent. | |
| 2964 } | |
| 2965 if (stt != NULL) { | |
| 2966 return (*stt)() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; | |
| 2967 } else { | |
| 2968 Sleep (0) ; | |
| 2969 } | |
| 2970 return os::YIELD_UNKNOWN ; | |
| 2971 } | |
| 2972 | |
| 2973 void os::yield() { os::NakedYield(); } | |
| 2974 | |
| 2975 void os::yield_all(int attempts) { | |
| 2976 // Yields to all threads, including threads with lower priorities | |
| 2977 Sleep(1); | |
| 2978 } | |
| 2979 | |
| 2980 // Win32 only gives you access to seven real priorities at a time, | |
| 2981 // so we compress Java's ten down to seven. It would be better | |
| 2982 // if we dynamically adjusted relative priorities. | |
| 2983 | |
| 2984 int os::java_to_os_priority[MaxPriority + 1] = { | |
| 2985 THREAD_PRIORITY_IDLE, // 0 Entry should never be used | |
| 2986 THREAD_PRIORITY_LOWEST, // 1 MinPriority | |
| 2987 THREAD_PRIORITY_LOWEST, // 2 | |
| 2988 THREAD_PRIORITY_BELOW_NORMAL, // 3 | |
| 2989 THREAD_PRIORITY_BELOW_NORMAL, // 4 | |
| 2990 THREAD_PRIORITY_NORMAL, // 5 NormPriority | |
| 2991 THREAD_PRIORITY_NORMAL, // 6 | |
| 2992 THREAD_PRIORITY_ABOVE_NORMAL, // 7 | |
| 2993 THREAD_PRIORITY_ABOVE_NORMAL, // 8 | |
| 2994 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority | |
| 2995 THREAD_PRIORITY_HIGHEST // 10 MaxPriority | |
| 2996 }; | |
| 2997 | |
| 2998 int prio_policy1[MaxPriority + 1] = { | |
| 2999 THREAD_PRIORITY_IDLE, // 0 Entry should never be used | |
| 3000 THREAD_PRIORITY_LOWEST, // 1 MinPriority | |
| 3001 THREAD_PRIORITY_LOWEST, // 2 | |
| 3002 THREAD_PRIORITY_BELOW_NORMAL, // 3 | |
| 3003 THREAD_PRIORITY_BELOW_NORMAL, // 4 | |
| 3004 THREAD_PRIORITY_NORMAL, // 5 NormPriority | |
| 3005 THREAD_PRIORITY_ABOVE_NORMAL, // 6 | |
| 3006 THREAD_PRIORITY_ABOVE_NORMAL, // 7 | |
| 3007 THREAD_PRIORITY_HIGHEST, // 8 | |
| 3008 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority | |
| 3009 THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority | |
| 3010 }; | |
| 3011 | |
| 3012 static int prio_init() { | |
| 3013 // If ThreadPriorityPolicy is 1, switch tables | |
| 3014 if (ThreadPriorityPolicy == 1) { | |
| 3015 int i; | |
| 3016 for (i = 0; i < MaxPriority + 1; i++) { | |
| 3017 os::java_to_os_priority[i] = prio_policy1[i]; | |
| 3018 } | |
| 3019 } | |
| 3020 return 0; | |
| 3021 } | |
| 3022 | |
| 3023 OSReturn os::set_native_priority(Thread* thread, int priority) { | |
| 3024 if (!UseThreadPriorities) return OS_OK; | |
| 3025 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; | |
| 3026 return ret ? OS_OK : OS_ERR; | |
| 3027 } | |
| 3028 | |
| 3029 OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { | |
| 3030 if ( !UseThreadPriorities ) { | |
| 3031 *priority_ptr = java_to_os_priority[NormPriority]; | |
| 3032 return OS_OK; | |
| 3033 } | |
| 3034 int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); | |
| 3035 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { | |
| 3036 assert(false, "GetThreadPriority failed"); | |
| 3037 return OS_ERR; | |
| 3038 } | |
| 3039 *priority_ptr = os_prio; | |
| 3040 return OS_OK; | |
| 3041 } | |
| 3042 | |
| 3043 | |
| 3044 // Hint to the underlying OS that a task switch would not be good. | |
| 3045 // Void return because it's a hint and can fail. | |
| 3046 void os::hint_no_preempt() {} | |
| 3047 | |
| 3048 void os::interrupt(Thread* thread) { | |
| 3049 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 3050 "possibility of dangling Thread pointer"); | |
| 3051 | |
| 3052 OSThread* osthread = thread->osthread(); | |
| 3053 osthread->set_interrupted(true); | |
| 3054 // More than one thread can get here with the same value of osthread, | |
| 3055 // resulting in multiple notifications. We do, however, want the store | |
| 3056 // to interrupted() to be visible to other threads before we post | |
| 3057 // the interrupt event. | |
| 3058 OrderAccess::release(); | |
| 3059 SetEvent(osthread->interrupt_event()); | |
| 3060 // For JSR166: unpark after setting status | |
| 3061 if (thread->is_Java_thread()) | |
| 3062 ((JavaThread*)thread)->parker()->unpark(); | |
| 3063 | |
| 3064 ParkEvent * ev = thread->_ParkEvent ; | |
| 3065 if (ev != NULL) ev->unpark() ; | |
| 3066 | |
| 3067 } | |
| 3068 | |
| 3069 | |
| 3070 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 3071 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 3072 "possibility of dangling Thread pointer"); | |
| 3073 | |
| 3074 OSThread* osthread = thread->osthread(); | |
| 3075 bool interrupted; | |
| 3076 interrupted = osthread->interrupted(); | |
| 3077 if (clear_interrupted == true) { | |
| 3078 osthread->set_interrupted(false); | |
| 3079 ResetEvent(osthread->interrupt_event()); | |
| 3080 } // Otherwise leave the interrupted state alone | |
| 3081 | |
| 3082 return interrupted; | |
| 3083 } | |
| 3084 | |
| 3085 // Get's a pc (hint) for a running thread. Currently used only for profiling. | |
| 3086 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 3087 CONTEXT context; | |
| 3088 context.ContextFlags = CONTEXT_CONTROL; | |
| 3089 HANDLE handle = thread->osthread()->thread_handle(); | |
| 3090 #ifdef _M_IA64 | |
| 3091 assert(0, "Fix get_thread_pc"); | |
| 3092 return ExtendedPC(NULL); | |
| 3093 #else | |
| 3094 if (GetThreadContext(handle, &context)) { | |
| 3095 #ifdef _M_AMD64 | |
| 3096 return ExtendedPC((address) context.Rip); | |
| 3097 #else | |
| 3098 return ExtendedPC((address) context.Eip); | |
| 3099 #endif | |
| 3100 } else { | |
| 3101 return ExtendedPC(NULL); | |
| 3102 } | |
| 3103 #endif | |
| 3104 } | |
| 3105 | |
| 3106 // GetCurrentThreadId() returns DWORD | |
| 3107 intx os::current_thread_id() { return GetCurrentThreadId(); } | |
| 3108 | |
| 3109 static int _initial_pid = 0; | |
| 3110 | |
| 3111 int os::current_process_id() | |
| 3112 { | |
| 3113 return (_initial_pid ? _initial_pid : _getpid()); | |
| 3114 } | |
| 3115 | |
| 3116 int os::win32::_vm_page_size = 0; | |
| 3117 int os::win32::_vm_allocation_granularity = 0; | |
| 3118 int os::win32::_processor_type = 0; | |
| 3119 // Processor level is not available on non-NT systems, use vm_version instead | |
| 3120 int os::win32::_processor_level = 0; | |
| 3121 julong os::win32::_physical_memory = 0; | |
| 3122 size_t os::win32::_default_stack_size = 0; | |
| 3123 | |
| 3124 intx os::win32::_os_thread_limit = 0; | |
| 3125 volatile intx os::win32::_os_thread_count = 0; | |
| 3126 | |
| 3127 bool os::win32::_is_nt = false; | |
|
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3128 bool os::win32::_is_windows_2003 = false; |
| 0 | 3129 |
| 3130 | |
| 3131 void os::win32::initialize_system_info() { | |
| 3132 SYSTEM_INFO si; | |
| 3133 GetSystemInfo(&si); | |
| 3134 _vm_page_size = si.dwPageSize; | |
| 3135 _vm_allocation_granularity = si.dwAllocationGranularity; | |
| 3136 _processor_type = si.dwProcessorType; | |
| 3137 _processor_level = si.wProcessorLevel; | |
| 3138 _processor_count = si.dwNumberOfProcessors; | |
| 3139 | |
|
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3140 MEMORYSTATUSEX ms; |
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3141 ms.dwLength = sizeof(ms); |
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3142 |
| 0 | 3143 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, |
| 3144 // dwMemoryLoad (% of memory in use) | |
|
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3145 GlobalMemoryStatusEx(&ms); |
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3146 _physical_memory = ms.ullTotalPhys; |
| 0 | 3147 |
| 3148 OSVERSIONINFO oi; | |
| 3149 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); | |
| 3150 GetVersionEx(&oi); | |
| 3151 switch(oi.dwPlatformId) { | |
| 3152 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; | |
|
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3153 case VER_PLATFORM_WIN32_NT: |
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3154 _is_nt = true; |
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3155 { |
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3156 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; |
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3157 if (os_vers == 5002) { |
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3158 _is_windows_2003 = true; |
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3159 } |
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3160 } |
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3161 break; |
| 0 | 3162 default: fatal("Unknown platform"); |
| 3163 } | |
| 3164 | |
| 3165 _default_stack_size = os::current_stack_size(); | |
| 3166 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); | |
| 3167 assert((_default_stack_size & (_vm_page_size - 1)) == 0, | |
| 3168 "stack size not a multiple of page size"); | |
| 3169 | |
| 3170 initialize_performance_counter(); | |
| 3171 | |
| 3172 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is | |
| 3173 // known to deadlock the system, if the VM issues to thread operations with | |
| 3174 // a too high frequency, e.g., such as changing the priorities. | |
| 3175 // The 6000 seems to work well - no deadlocks has been notices on the test | |
| 3176 // programs that we have seen experience this problem. | |
| 3177 if (!os::win32::is_nt()) { | |
| 3178 StarvationMonitorInterval = 6000; | |
| 3179 } | |
| 3180 } | |
| 3181 | |
| 3182 | |
| 3183 void os::win32::setmode_streams() { | |
| 3184 _setmode(_fileno(stdin), _O_BINARY); | |
| 3185 _setmode(_fileno(stdout), _O_BINARY); | |
| 3186 _setmode(_fileno(stderr), _O_BINARY); | |
| 3187 } | |
| 3188 | |
| 3189 | |
| 3190 int os::message_box(const char* title, const char* message) { | |
| 3191 int result = MessageBox(NULL, message, title, | |
| 3192 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); | |
| 3193 return result == IDYES; | |
| 3194 } | |
| 3195 | |
| 3196 int os::allocate_thread_local_storage() { | |
| 3197 return TlsAlloc(); | |
| 3198 } | |
| 3199 | |
| 3200 | |
| 3201 void os::free_thread_local_storage(int index) { | |
| 3202 TlsFree(index); | |
| 3203 } | |
| 3204 | |
| 3205 | |
| 3206 void os::thread_local_storage_at_put(int index, void* value) { | |
| 3207 TlsSetValue(index, value); | |
| 3208 assert(thread_local_storage_at(index) == value, "Just checking"); | |
| 3209 } | |
| 3210 | |
| 3211 | |
| 3212 void* os::thread_local_storage_at(int index) { | |
| 3213 return TlsGetValue(index); | |
| 3214 } | |
| 3215 | |
| 3216 | |
| 3217 #ifndef PRODUCT | |
| 3218 #ifndef _WIN64 | |
| 3219 // Helpers to check whether NX protection is enabled | |
| 3220 int nx_exception_filter(_EXCEPTION_POINTERS *pex) { | |
| 3221 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && | |
| 3222 pex->ExceptionRecord->NumberParameters > 0 && | |
| 3223 pex->ExceptionRecord->ExceptionInformation[0] == | |
| 3224 EXCEPTION_INFO_EXEC_VIOLATION) { | |
| 3225 return EXCEPTION_EXECUTE_HANDLER; | |
| 3226 } | |
| 3227 return EXCEPTION_CONTINUE_SEARCH; | |
| 3228 } | |
| 3229 | |
| 3230 void nx_check_protection() { | |
| 3231 // If NX is enabled we'll get an exception calling into code on the stack | |
| 3232 char code[] = { (char)0xC3 }; // ret | |
| 3233 void *code_ptr = (void *)code; | |
| 3234 __try { | |
| 3235 __asm call code_ptr | |
| 3236 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { | |
| 3237 tty->print_raw_cr("NX protection detected."); | |
| 3238 } | |
| 3239 } | |
| 3240 #endif // _WIN64 | |
| 3241 #endif // PRODUCT | |
| 3242 | |
| 3243 // this is called _before_ the global arguments have been parsed | |
| 3244 void os::init(void) { | |
| 3245 _initial_pid = _getpid(); | |
| 3246 | |
| 3247 init_random(1234567); | |
| 3248 | |
| 3249 win32::initialize_system_info(); | |
| 3250 win32::setmode_streams(); | |
| 3251 init_page_sizes((size_t) win32::vm_page_size()); | |
| 3252 | |
| 3253 // For better scalability on MP systems (must be called after initialize_system_info) | |
| 3254 #ifndef PRODUCT | |
| 3255 if (is_MP()) { | |
| 3256 NoYieldsInMicrolock = true; | |
| 3257 } | |
| 3258 #endif | |
|
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3259 // This may be overridden later when argument processing is done. |
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3260 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, |
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3261 os::win32::is_windows_2003()); |
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3262 |
| 0 | 3263 // Initialize main_process and main_thread |
| 3264 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle | |
|
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3265 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, |
| 0 | 3266 &main_thread, THREAD_ALL_ACCESS, false, 0)) { |
| 3267 fatal("DuplicateHandle failed\n"); | |
| 3268 } | |
| 3269 main_thread_id = (int) GetCurrentThreadId(); | |
| 3270 } | |
| 3271 | |
| 3272 // To install functions for atexit processing | |
| 3273 extern "C" { | |
| 3274 static void perfMemory_exit_helper() { | |
| 3275 perfMemory_exit(); | |
| 3276 } | |
| 3277 } | |
| 3278 | |
| 3279 | |
| 3280 // this is called _after_ the global arguments have been parsed | |
| 3281 jint os::init_2(void) { | |
| 3282 // Allocate a single page and mark it as readable for safepoint polling | |
| 3283 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); | |
| 3284 guarantee( polling_page != NULL, "Reserve Failed for polling page"); | |
| 3285 | |
| 3286 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); | |
| 3287 guarantee( return_page != NULL, "Commit Failed for polling page"); | |
| 3288 | |
| 3289 os::set_polling_page( polling_page ); | |
| 3290 | |
| 3291 #ifndef PRODUCT | |
| 3292 if( Verbose && PrintMiscellaneous ) | |
| 3293 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 3294 #endif | |
| 3295 | |
| 3296 if (!UseMembar) { | |
| 656 | 3297 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); |
| 0 | 3298 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); |
| 3299 | |
| 656 | 3300 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); |
| 0 | 3301 guarantee( return_page != NULL, "Commit Failed for memory serialize page"); |
| 3302 | |
| 3303 os::set_memory_serialize_page( mem_serialize_page ); | |
| 3304 | |
| 3305 #ifndef PRODUCT | |
| 3306 if(Verbose && PrintMiscellaneous) | |
| 3307 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 3308 #endif | |
| 3309 } | |
| 3310 | |
| 3311 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); | |
| 3312 | |
| 3313 // Setup Windows Exceptions | |
| 3314 | |
| 3315 // On Itanium systems, Structured Exception Handling does not | |
| 3316 // work since stack frames must be walkable by the OS. Since | |
| 3317 // much of our code is dynamically generated, and we do not have | |
| 3318 // proper unwind .xdata sections, the system simply exits | |
| 3319 // rather than delivering the exception. To work around | |
| 3320 // this we use VectorExceptions instead. | |
| 3321 #ifdef _WIN64 | |
| 3322 if (UseVectoredExceptions) { | |
| 3323 topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter); | |
| 3324 } | |
| 3325 #endif | |
| 3326 | |
| 3327 // for debugging float code generation bugs | |
| 3328 if (ForceFloatExceptions) { | |
| 3329 #ifndef _WIN64 | |
| 3330 static long fp_control_word = 0; | |
| 3331 __asm { fstcw fp_control_word } | |
| 3332 // see Intel PPro Manual, Vol. 2, p 7-16 | |
| 3333 const long precision = 0x20; | |
| 3334 const long underflow = 0x10; | |
| 3335 const long overflow = 0x08; | |
| 3336 const long zero_div = 0x04; | |
| 3337 const long denorm = 0x02; | |
| 3338 const long invalid = 0x01; | |
| 3339 fp_control_word |= invalid; | |
| 3340 __asm { fldcw fp_control_word } | |
| 3341 #endif | |
| 3342 } | |
| 3343 | |
| 3344 // Initialize HPI. | |
| 3345 jint hpi_result = hpi::initialize(); | |
| 3346 if (hpi_result != JNI_OK) { return hpi_result; } | |
| 3347 | |
| 3348 // If stack_commit_size is 0, windows will reserve the default size, | |
| 3349 // but only commit a small portion of it. | |
| 3350 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); | |
| 3351 size_t default_reserve_size = os::win32::default_stack_size(); | |
| 3352 size_t actual_reserve_size = stack_commit_size; | |
| 3353 if (stack_commit_size < default_reserve_size) { | |
| 3354 // If stack_commit_size == 0, we want this too | |
| 3355 actual_reserve_size = default_reserve_size; | |
| 3356 } | |
| 3357 | |
| 3358 JavaThread::set_stack_size_at_create(stack_commit_size); | |
| 3359 | |
| 3360 // Calculate theoretical max. size of Threads to guard gainst artifical | |
| 3361 // out-of-memory situations, where all available address-space has been | |
| 3362 // reserved by thread stacks. | |
| 3363 assert(actual_reserve_size != 0, "Must have a stack"); | |
| 3364 | |
| 3365 // Calculate the thread limit when we should start doing Virtual Memory | |
| 3366 // banging. Currently when the threads will have used all but 200Mb of space. | |
| 3367 // | |
| 3368 // TODO: consider performing a similar calculation for commit size instead | |
| 3369 // as reserve size, since on a 64-bit platform we'll run into that more | |
| 3370 // often than running out of virtual memory space. We can use the | |
| 3371 // lower value of the two calculations as the os_thread_limit. | |
|
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3372 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); |
| 0 | 3373 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); |
| 3374 | |
| 3375 // at exit methods are called in the reverse order of their registration. | |
| 3376 // there is no limit to the number of functions registered. atexit does | |
| 3377 // not set errno. | |
| 3378 | |
| 3379 if (PerfAllowAtExitRegistration) { | |
| 3380 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 3381 // atexit functions can be delayed until process exit time, which | |
| 3382 // can be problematic for embedded VM situations. Embedded VMs should | |
| 3383 // call DestroyJavaVM() to assure that VM resources are released. | |
| 3384 | |
| 3385 // note: perfMemory_exit_helper atexit function may be removed in | |
| 3386 // the future if the appropriate cleanup code can be added to the | |
| 3387 // VM_Exit VMOperation's doit method. | |
| 3388 if (atexit(perfMemory_exit_helper) != 0) { | |
| 3389 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); | |
| 3390 } | |
| 3391 } | |
| 3392 | |
| 3393 // initialize PSAPI or ToolHelp for fatal error handler | |
| 3394 if (win32::is_nt()) _init_psapi(); | |
| 3395 else _init_toolhelp(); | |
| 3396 | |
| 3397 #ifndef _WIN64 | |
| 3398 // Print something if NX is enabled (win32 on AMD64) | |
| 3399 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); | |
| 3400 #endif | |
| 3401 | |
| 3402 // initialize thread priority policy | |
| 3403 prio_init(); | |
| 3404 | |
|
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3405 if (UseNUMA && !ForceNUMA) { |
|
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3406 UseNUMA = false; // Currently unsupported. |
|
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3407 } |
|
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|
3408 |
| 0 | 3409 return JNI_OK; |
| 3410 } | |
| 3411 | |
| 3412 | |
| 3413 // Mark the polling page as unreadable | |
| 3414 void os::make_polling_page_unreadable(void) { | |
| 3415 DWORD old_status; | |
| 3416 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) | |
| 3417 fatal("Could not disable polling page"); | |
| 3418 }; | |
| 3419 | |
| 3420 // Mark the polling page as readable | |
| 3421 void os::make_polling_page_readable(void) { | |
| 3422 DWORD old_status; | |
| 3423 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) | |
| 3424 fatal("Could not enable polling page"); | |
| 3425 }; | |
| 3426 | |
| 3427 | |
| 3428 int os::stat(const char *path, struct stat *sbuf) { | |
| 3429 char pathbuf[MAX_PATH]; | |
| 3430 if (strlen(path) > MAX_PATH - 1) { | |
| 3431 errno = ENAMETOOLONG; | |
| 3432 return -1; | |
| 3433 } | |
| 3434 hpi::native_path(strcpy(pathbuf, path)); | |
| 3435 int ret = ::stat(pathbuf, sbuf); | |
| 3436 if (sbuf != NULL && UseUTCFileTimestamp) { | |
| 3437 // Fix for 6539723. st_mtime returned from stat() is dependent on | |
| 3438 // the system timezone and so can return different values for the | |
| 3439 // same file if/when daylight savings time changes. This adjustment | |
| 3440 // makes sure the same timestamp is returned regardless of the TZ. | |
| 3441 // | |
| 3442 // See: | |
| 3443 // http://msdn.microsoft.com/library/ | |
| 3444 // default.asp?url=/library/en-us/sysinfo/base/ | |
| 3445 // time_zone_information_str.asp | |
| 3446 // and | |
| 3447 // http://msdn.microsoft.com/library/default.asp?url= | |
| 3448 // /library/en-us/sysinfo/base/settimezoneinformation.asp | |
| 3449 // | |
| 3450 // NOTE: there is a insidious bug here: If the timezone is changed | |
| 3451 // after the call to stat() but before 'GetTimeZoneInformation()', then | |
| 3452 // the adjustment we do here will be wrong and we'll return the wrong | |
| 3453 // value (which will likely end up creating an invalid class data | |
| 3454 // archive). Absent a better API for this, or some time zone locking | |
| 3455 // mechanism, we'll have to live with this risk. | |
| 3456 TIME_ZONE_INFORMATION tz; | |
| 3457 DWORD tzid = GetTimeZoneInformation(&tz); | |
| 3458 int daylightBias = | |
| 3459 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; | |
| 3460 sbuf->st_mtime += (tz.Bias + daylightBias) * 60; | |
| 3461 } | |
| 3462 return ret; | |
| 3463 } | |
| 3464 | |
| 3465 | |
| 3466 #define FT2INT64(ft) \ | |
| 3467 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) | |
| 3468 | |
| 3469 | |
| 3470 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 3471 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 3472 // of a thread. | |
| 3473 // | |
| 3474 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
| 3475 // the fast estimate available on the platform. | |
| 3476 | |
| 3477 // current_thread_cpu_time() is not optimized for Windows yet | |
| 3478 jlong os::current_thread_cpu_time() { | |
| 3479 // return user + sys since the cost is the same | |
| 3480 return os::thread_cpu_time(Thread::current(), true /* user+sys */); | |
| 3481 } | |
| 3482 | |
| 3483 jlong os::thread_cpu_time(Thread* thread) { | |
| 3484 // consistent with what current_thread_cpu_time() returns. | |
| 3485 return os::thread_cpu_time(thread, true /* user+sys */); | |
| 3486 } | |
| 3487 | |
| 3488 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 3489 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 3490 } | |
| 3491 | |
| 3492 jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { | |
| 3493 // This code is copy from clasic VM -> hpi::sysThreadCPUTime | |
| 3494 // If this function changes, os::is_thread_cpu_time_supported() should too | |
| 3495 if (os::win32::is_nt()) { | |
| 3496 FILETIME CreationTime; | |
| 3497 FILETIME ExitTime; | |
| 3498 FILETIME KernelTime; | |
| 3499 FILETIME UserTime; | |
| 3500 | |
| 3501 if ( GetThreadTimes(thread->osthread()->thread_handle(), | |
| 3502 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) | |
| 3503 return -1; | |
| 3504 else | |
| 3505 if (user_sys_cpu_time) { | |
| 3506 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; | |
| 3507 } else { | |
| 3508 return FT2INT64(UserTime) * 100; | |
| 3509 } | |
| 3510 } else { | |
| 3511 return (jlong) timeGetTime() * 1000000; | |
| 3512 } | |
| 3513 } | |
| 3514 | |
| 3515 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 3516 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits | |
| 3517 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time | |
| 3518 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time | |
| 3519 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 3520 } | |
| 3521 | |
| 3522 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 3523 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits | |
| 3524 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time | |
| 3525 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time | |
| 3526 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 3527 } | |
| 3528 | |
| 3529 bool os::is_thread_cpu_time_supported() { | |
| 3530 // see os::thread_cpu_time | |
| 3531 if (os::win32::is_nt()) { | |
| 3532 FILETIME CreationTime; | |
| 3533 FILETIME ExitTime; | |
| 3534 FILETIME KernelTime; | |
| 3535 FILETIME UserTime; | |
| 3536 | |
| 3537 if ( GetThreadTimes(GetCurrentThread(), | |
| 3538 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) | |
| 3539 return false; | |
| 3540 else | |
| 3541 return true; | |
| 3542 } else { | |
| 3543 return false; | |
| 3544 } | |
| 3545 } | |
| 3546 | |
| 3547 // Windows does't provide a loadavg primitive so this is stubbed out for now. | |
| 3548 // It does have primitives (PDH API) to get CPU usage and run queue length. | |
| 3549 // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" | |
| 3550 // If we wanted to implement loadavg on Windows, we have a few options: | |
| 3551 // | |
| 3552 // a) Query CPU usage and run queue length and "fake" an answer by | |
| 3553 // returning the CPU usage if it's under 100%, and the run queue | |
| 3554 // length otherwise. It turns out that querying is pretty slow | |
| 3555 // on Windows, on the order of 200 microseconds on a fast machine. | |
| 3556 // Note that on the Windows the CPU usage value is the % usage | |
| 3557 // since the last time the API was called (and the first call | |
| 3558 // returns 100%), so we'd have to deal with that as well. | |
| 3559 // | |
| 3560 // b) Sample the "fake" answer using a sampling thread and store | |
| 3561 // the answer in a global variable. The call to loadavg would | |
| 3562 // just return the value of the global, avoiding the slow query. | |
| 3563 // | |
| 3564 // c) Sample a better answer using exponential decay to smooth the | |
| 3565 // value. This is basically the algorithm used by UNIX kernels. | |
| 3566 // | |
| 3567 // Note that sampling thread starvation could affect both (b) and (c). | |
| 3568 int os::loadavg(double loadavg[], int nelem) { | |
| 3569 return -1; | |
| 3570 } | |
| 3571 | |
| 3572 | |
| 3573 // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() | |
| 3574 bool os::dont_yield() { | |
| 3575 return DontYieldALot; | |
| 3576 } | |
| 3577 | |
| 3578 // Is a (classpath) directory empty? | |
| 3579 bool os::dir_is_empty(const char* path) { | |
| 3580 WIN32_FIND_DATA fd; | |
| 3581 HANDLE f = FindFirstFile(path, &fd); | |
| 3582 if (f == INVALID_HANDLE_VALUE) { | |
| 3583 return true; | |
| 3584 } | |
| 3585 FindClose(f); | |
| 3586 return false; | |
| 3587 } | |
| 3588 | |
| 3589 // create binary file, rewriting existing file if required | |
| 3590 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 3591 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; | |
| 3592 if (!rewrite_existing) { | |
| 3593 oflags |= _O_EXCL; | |
| 3594 } | |
| 3595 return ::open(path, oflags, _S_IREAD | _S_IWRITE); | |
| 3596 } | |
| 3597 | |
| 3598 // return current position of file pointer | |
| 3599 jlong os::current_file_offset(int fd) { | |
| 3600 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); | |
| 3601 } | |
| 3602 | |
| 3603 // move file pointer to the specified offset | |
| 3604 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 3605 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); | |
| 3606 } | |
| 3607 | |
| 3608 | |
| 3609 // Map a block of memory. | |
| 3610 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
| 3611 char *addr, size_t bytes, bool read_only, | |
| 3612 bool allow_exec) { | |
| 3613 HANDLE hFile; | |
| 3614 char* base; | |
| 3615 | |
| 3616 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, | |
| 3617 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); | |
| 3618 if (hFile == NULL) { | |
| 3619 if (PrintMiscellaneous && Verbose) { | |
| 3620 DWORD err = GetLastError(); | |
| 3621 tty->print_cr("CreateFile() failed: GetLastError->%ld."); | |
| 3622 } | |
| 3623 return NULL; | |
| 3624 } | |
| 3625 | |
| 3626 if (allow_exec) { | |
| 3627 // CreateFileMapping/MapViewOfFileEx can't map executable memory | |
| 3628 // unless it comes from a PE image (which the shared archive is not.) | |
| 3629 // Even VirtualProtect refuses to give execute access to mapped memory | |
| 3630 // that was not previously executable. | |
| 3631 // | |
| 3632 // Instead, stick the executable region in anonymous memory. Yuck. | |
| 3633 // Penalty is that ~4 pages will not be shareable - in the future | |
| 3634 // we might consider DLLizing the shared archive with a proper PE | |
| 3635 // header so that mapping executable + sharing is possible. | |
| 3636 | |
| 3637 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, | |
| 3638 PAGE_READWRITE); | |
| 3639 if (base == NULL) { | |
| 3640 if (PrintMiscellaneous && Verbose) { | |
| 3641 DWORD err = GetLastError(); | |
| 3642 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); | |
| 3643 } | |
| 3644 CloseHandle(hFile); | |
| 3645 return NULL; | |
| 3646 } | |
| 3647 | |
| 3648 DWORD bytes_read; | |
| 3649 OVERLAPPED overlapped; | |
| 3650 overlapped.Offset = (DWORD)file_offset; | |
| 3651 overlapped.OffsetHigh = 0; | |
| 3652 overlapped.hEvent = NULL; | |
| 3653 // ReadFile guarantees that if the return value is true, the requested | |
| 3654 // number of bytes were read before returning. | |
| 3655 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; | |
| 3656 if (!res) { | |
| 3657 if (PrintMiscellaneous && Verbose) { | |
| 3658 DWORD err = GetLastError(); | |
| 3659 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); | |
| 3660 } | |
| 3661 release_memory(base, bytes); | |
| 3662 CloseHandle(hFile); | |
| 3663 return NULL; | |
| 3664 } | |
| 3665 } else { | |
| 3666 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, | |
| 3667 NULL /*file_name*/); | |
| 3668 if (hMap == NULL) { | |
| 3669 if (PrintMiscellaneous && Verbose) { | |
| 3670 DWORD err = GetLastError(); | |
| 3671 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld."); | |
| 3672 } | |
| 3673 CloseHandle(hFile); | |
| 3674 return NULL; | |
| 3675 } | |
| 3676 | |
| 3677 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; | |
| 3678 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, | |
| 3679 (DWORD)bytes, addr); | |
| 3680 if (base == NULL) { | |
| 3681 if (PrintMiscellaneous && Verbose) { | |
| 3682 DWORD err = GetLastError(); | |
| 3683 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); | |
| 3684 } | |
| 3685 CloseHandle(hMap); | |
| 3686 CloseHandle(hFile); | |
| 3687 return NULL; | |
| 3688 } | |
| 3689 | |
| 3690 if (CloseHandle(hMap) == 0) { | |
| 3691 if (PrintMiscellaneous && Verbose) { | |
| 3692 DWORD err = GetLastError(); | |
| 3693 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); | |
| 3694 } | |
| 3695 CloseHandle(hFile); | |
| 3696 return base; | |
| 3697 } | |
| 3698 } | |
| 3699 | |
| 3700 if (allow_exec) { | |
| 3701 DWORD old_protect; | |
| 3702 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; | |
| 3703 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; | |
| 3704 | |
| 3705 if (!res) { | |
| 3706 if (PrintMiscellaneous && Verbose) { | |
| 3707 DWORD err = GetLastError(); | |
| 3708 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); | |
| 3709 } | |
| 3710 // Don't consider this a hard error, on IA32 even if the | |
| 3711 // VirtualProtect fails, we should still be able to execute | |
| 3712 CloseHandle(hFile); | |
| 3713 return base; | |
| 3714 } | |
| 3715 } | |
| 3716 | |
| 3717 if (CloseHandle(hFile) == 0) { | |
| 3718 if (PrintMiscellaneous && Verbose) { | |
| 3719 DWORD err = GetLastError(); | |
| 3720 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); | |
| 3721 } | |
| 3722 return base; | |
| 3723 } | |
| 3724 | |
| 3725 return base; | |
| 3726 } | |
| 3727 | |
| 3728 | |
| 3729 // Remap a block of memory. | |
| 3730 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
| 3731 char *addr, size_t bytes, bool read_only, | |
| 3732 bool allow_exec) { | |
| 3733 // This OS does not allow existing memory maps to be remapped so we | |
| 3734 // have to unmap the memory before we remap it. | |
| 3735 if (!os::unmap_memory(addr, bytes)) { | |
| 3736 return NULL; | |
| 3737 } | |
| 3738 | |
| 3739 // There is a very small theoretical window between the unmap_memory() | |
| 3740 // call above and the map_memory() call below where a thread in native | |
| 3741 // code may be able to access an address that is no longer mapped. | |
| 3742 | |
| 3743 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 3744 allow_exec); | |
| 3745 } | |
| 3746 | |
| 3747 | |
| 3748 // Unmap a block of memory. | |
| 3749 // Returns true=success, otherwise false. | |
| 3750 | |
| 3751 bool os::unmap_memory(char* addr, size_t bytes) { | |
| 3752 BOOL result = UnmapViewOfFile(addr); | |
| 3753 if (result == 0) { | |
| 3754 if (PrintMiscellaneous && Verbose) { | |
| 3755 DWORD err = GetLastError(); | |
| 3756 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); | |
| 3757 } | |
| 3758 return false; | |
| 3759 } | |
| 3760 return true; | |
| 3761 } | |
| 3762 | |
| 3763 void os::pause() { | |
| 3764 char filename[MAX_PATH]; | |
| 3765 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 3766 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 3767 } else { | |
| 3768 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 3769 } | |
| 3770 | |
| 3771 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 3772 if (fd != -1) { | |
| 3773 struct stat buf; | |
| 3774 close(fd); | |
| 3775 while (::stat(filename, &buf) == 0) { | |
| 3776 Sleep(100); | |
| 3777 } | |
| 3778 } else { | |
| 3779 jio_fprintf(stderr, | |
| 3780 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 3781 } | |
| 3782 } | |
| 3783 | |
| 3784 // An Event wraps a win32 "CreateEvent" kernel handle. | |
| 3785 // | |
| 3786 // We have a number of choices regarding "CreateEvent" win32 handle leakage: | |
| 3787 // | |
| 3788 // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle | |
| 3789 // field, and call CloseHandle() on the win32 event handle. Unpark() would | |
| 3790 // need to be modified to tolerate finding a NULL (invalid) win32 event handle. | |
| 3791 // In addition, an unpark() operation might fetch the handle field, but the | |
| 3792 // event could recycle between the fetch and the SetEvent() operation. | |
| 3793 // SetEvent() would either fail because the handle was invalid, or inadvertently work, | |
| 3794 // as the win32 handle value had been recycled. In an ideal world calling SetEvent() | |
| 3795 // on an stale but recycled handle would be harmless, but in practice this might | |
| 3796 // confuse other non-Sun code, so it's not a viable approach. | |
| 3797 // | |
| 3798 // 2: Once a win32 event handle is associated with an Event, it remains associated | |
| 3799 // with the Event. The event handle is never closed. This could be construed | |
| 3800 // as handle leakage, but only up to the maximum # of threads that have been extant | |
| 3801 // at any one time. This shouldn't be an issue, as windows platforms typically | |
| 3802 // permit a process to have hundreds of thousands of open handles. | |
| 3803 // | |
| 3804 // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList | |
| 3805 // and release unused handles. | |
| 3806 // | |
| 3807 // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. | |
| 3808 // It's not clear, however, that we wouldn't be trading one type of leak for another. | |
| 3809 // | |
| 3810 // 5. Use an RCU-like mechanism (Read-Copy Update). | |
| 3811 // Or perhaps something similar to Maged Michael's "Hazard pointers". | |
| 3812 // | |
| 3813 // We use (2). | |
| 3814 // | |
| 3815 // TODO-FIXME: | |
| 3816 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. | |
| 3817 // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks | |
| 3818 // to recover from (or at least detect) the dreaded Windows 841176 bug. | |
| 3819 // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent | |
| 3820 // into a single win32 CreateEvent() handle. | |
| 3821 // | |
| 3822 // _Event transitions in park() | |
| 3823 // -1 => -1 : illegal | |
| 3824 // 1 => 0 : pass - return immediately | |
| 3825 // 0 => -1 : block | |
| 3826 // | |
| 3827 // _Event serves as a restricted-range semaphore : | |
| 3828 // -1 : thread is blocked | |
| 3829 // 0 : neutral - thread is running or ready | |
| 3830 // 1 : signaled - thread is running or ready | |
| 3831 // | |
| 3832 // Another possible encoding of _Event would be | |
| 3833 // with explicit "PARKED" and "SIGNALED" bits. | |
| 3834 | |
| 3835 int os::PlatformEvent::park (jlong Millis) { | |
| 3836 guarantee (_ParkHandle != NULL , "Invariant") ; | |
| 3837 guarantee (Millis > 0 , "Invariant") ; | |
| 3838 int v ; | |
| 3839 | |
| 3840 // CONSIDER: defer assigning a CreateEvent() handle to the Event until | |
| 3841 // the initial park() operation. | |
| 3842 | |
| 3843 for (;;) { | |
| 3844 v = _Event ; | |
| 3845 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 3846 } | |
| 3847 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 3848 if (v != 0) return OS_OK ; | |
| 3849 | |
| 3850 // Do this the hard way by blocking ... | |
| 3851 // TODO: consider a brief spin here, gated on the success of recent | |
| 3852 // spin attempts by this thread. | |
| 3853 // | |
| 3854 // We decompose long timeouts into series of shorter timed waits. | |
| 3855 // Evidently large timo values passed in WaitForSingleObject() are problematic on some | |
| 3856 // versions of Windows. See EventWait() for details. This may be superstition. Or not. | |
| 3857 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time | |
| 3858 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from | |
| 3859 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend | |
| 3860 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == | |
| 3861 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate | |
| 3862 // for the already waited time. This policy does not admit any new outcomes. | |
| 3863 // In the future, however, we might want to track the accumulated wait time and | |
| 3864 // adjust Millis accordingly if we encounter a spurious wakeup. | |
| 3865 | |
| 3866 const int MAXTIMEOUT = 0x10000000 ; | |
| 3867 DWORD rv = WAIT_TIMEOUT ; | |
| 3868 while (_Event < 0 && Millis > 0) { | |
| 3869 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) | |
| 3870 if (Millis > MAXTIMEOUT) { | |
| 3871 prd = MAXTIMEOUT ; | |
| 3872 } | |
| 3873 rv = ::WaitForSingleObject (_ParkHandle, prd) ; | |
| 3874 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; | |
| 3875 if (rv == WAIT_TIMEOUT) { | |
| 3876 Millis -= prd ; | |
| 3877 } | |
| 3878 } | |
| 3879 v = _Event ; | |
| 3880 _Event = 0 ; | |
| 3881 OrderAccess::fence() ; | |
| 3882 // If we encounter a nearly simultanous timeout expiry and unpark() | |
| 3883 // we return OS_OK indicating we awoke via unpark(). | |
| 3884 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. | |
| 3885 return (v >= 0) ? OS_OK : OS_TIMEOUT ; | |
| 3886 } | |
| 3887 | |
| 3888 void os::PlatformEvent::park () { | |
| 3889 guarantee (_ParkHandle != NULL, "Invariant") ; | |
| 3890 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 3891 // may call park(). | |
| 3892 int v ; | |
| 3893 for (;;) { | |
| 3894 v = _Event ; | |
| 3895 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 3896 } | |
| 3897 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 3898 if (v != 0) return ; | |
| 3899 | |
| 3900 // Do this the hard way by blocking ... | |
| 3901 // TODO: consider a brief spin here, gated on the success of recent | |
| 3902 // spin attempts by this thread. | |
| 3903 while (_Event < 0) { | |
| 3904 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; | |
| 3905 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; | |
| 3906 } | |
| 3907 | |
| 3908 // Usually we'll find _Event == 0 at this point, but as | |
| 3909 // an optional optimization we clear it, just in case can | |
| 3910 // multiple unpark() operations drove _Event up to 1. | |
| 3911 _Event = 0 ; | |
| 3912 OrderAccess::fence() ; | |
| 3913 guarantee (_Event >= 0, "invariant") ; | |
| 3914 } | |
| 3915 | |
| 3916 void os::PlatformEvent::unpark() { | |
| 3917 guarantee (_ParkHandle != NULL, "Invariant") ; | |
| 3918 int v ; | |
| 3919 for (;;) { | |
| 3920 v = _Event ; // Increment _Event if it's < 1. | |
| 3921 if (v > 0) { | |
| 3922 // If it's already signaled just return. | |
| 3923 // The LD of _Event could have reordered or be satisfied | |
| 3924 // by a read-aside from this processor's write buffer. | |
| 3925 // To avoid problems execute a barrier and then | |
| 3926 // ratify the value. A degenerate CAS() would also work. | |
| 3927 // Viz., CAS (v+0, &_Event, v) == v). | |
| 3928 OrderAccess::fence() ; | |
| 3929 if (_Event == v) return ; | |
| 3930 continue ; | |
| 3931 } | |
| 3932 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; | |
| 3933 } | |
| 3934 if (v < 0) { | |
| 3935 ::SetEvent (_ParkHandle) ; | |
| 3936 } | |
| 3937 } | |
| 3938 | |
| 3939 | |
| 3940 // JSR166 | |
| 3941 // ------------------------------------------------------- | |
| 3942 | |
| 3943 /* | |
| 3944 * The Windows implementation of Park is very straightforward: Basic | |
| 3945 * operations on Win32 Events turn out to have the right semantics to | |
| 3946 * use them directly. We opportunistically resuse the event inherited | |
| 3947 * from Monitor. | |
| 3948 */ | |
| 3949 | |
| 3950 | |
| 3951 void Parker::park(bool isAbsolute, jlong time) { | |
| 3952 guarantee (_ParkEvent != NULL, "invariant") ; | |
| 3953 // First, demultiplex/decode time arguments | |
| 3954 if (time < 0) { // don't wait | |
| 3955 return; | |
| 3956 } | |
| 3957 else if (time == 0) { | |
| 3958 time = INFINITE; | |
| 3959 } | |
| 3960 else if (isAbsolute) { | |
| 3961 time -= os::javaTimeMillis(); // convert to relative time | |
| 3962 if (time <= 0) // already elapsed | |
| 3963 return; | |
| 3964 } | |
| 3965 else { // relative | |
| 3966 time /= 1000000; // Must coarsen from nanos to millis | |
| 3967 if (time == 0) // Wait for the minimal time unit if zero | |
| 3968 time = 1; | |
| 3969 } | |
| 3970 | |
| 3971 JavaThread* thread = (JavaThread*)(Thread::current()); | |
| 3972 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 3973 JavaThread *jt = (JavaThread *)thread; | |
| 3974 | |
| 3975 // Don't wait if interrupted or already triggered | |
| 3976 if (Thread::is_interrupted(thread, false) || | |
| 3977 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { | |
| 3978 ResetEvent(_ParkEvent); | |
| 3979 return; | |
| 3980 } | |
| 3981 else { | |
| 3982 ThreadBlockInVM tbivm(jt); | |
| 3983 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3984 jt->set_suspend_equivalent(); | |
| 3985 | |
| 3986 WaitForSingleObject(_ParkEvent, time); | |
| 3987 ResetEvent(_ParkEvent); | |
| 3988 | |
| 3989 // If externally suspended while waiting, re-suspend | |
| 3990 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 3991 jt->java_suspend_self(); | |
| 3992 } | |
| 3993 } | |
| 3994 } | |
| 3995 | |
| 3996 void Parker::unpark() { | |
| 3997 guarantee (_ParkEvent != NULL, "invariant") ; | |
| 3998 SetEvent(_ParkEvent); | |
| 3999 } | |
| 4000 | |
| 4001 // Run the specified command in a separate process. Return its exit value, | |
| 4002 // or -1 on failure (e.g. can't create a new process). | |
| 4003 int os::fork_and_exec(char* cmd) { | |
| 4004 STARTUPINFO si; | |
| 4005 PROCESS_INFORMATION pi; | |
| 4006 | |
| 4007 memset(&si, 0, sizeof(si)); | |
| 4008 si.cb = sizeof(si); | |
| 4009 memset(&pi, 0, sizeof(pi)); | |
| 4010 BOOL rslt = CreateProcess(NULL, // executable name - use command line | |
| 4011 cmd, // command line | |
| 4012 NULL, // process security attribute | |
| 4013 NULL, // thread security attribute | |
| 4014 TRUE, // inherits system handles | |
| 4015 0, // no creation flags | |
| 4016 NULL, // use parent's environment block | |
| 4017 NULL, // use parent's starting directory | |
| 4018 &si, // (in) startup information | |
| 4019 &pi); // (out) process information | |
| 4020 | |
| 4021 if (rslt) { | |
| 4022 // Wait until child process exits. | |
| 4023 WaitForSingleObject(pi.hProcess, INFINITE); | |
| 4024 | |
| 4025 DWORD exit_code; | |
| 4026 GetExitCodeProcess(pi.hProcess, &exit_code); | |
| 4027 | |
| 4028 // Close process and thread handles. | |
| 4029 CloseHandle(pi.hProcess); | |
| 4030 CloseHandle(pi.hThread); | |
| 4031 | |
| 4032 return (int)exit_code; | |
| 4033 } else { | |
| 4034 return -1; | |
| 4035 } | |
| 4036 } | |
| 4037 | |
| 4038 //-------------------------------------------------------------------------------------------------- | |
| 4039 // Non-product code | |
| 4040 | |
| 4041 static int mallocDebugIntervalCounter = 0; | |
| 4042 static int mallocDebugCounter = 0; | |
| 4043 bool os::check_heap(bool force) { | |
| 4044 if (++mallocDebugCounter < MallocVerifyStart && !force) return true; | |
| 4045 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { | |
| 4046 // Note: HeapValidate executes two hardware breakpoints when it finds something | |
| 4047 // wrong; at these points, eax contains the address of the offending block (I think). | |
| 4048 // To get to the exlicit error message(s) below, just continue twice. | |
| 4049 HANDLE heap = GetProcessHeap(); | |
| 4050 { HeapLock(heap); | |
| 4051 PROCESS_HEAP_ENTRY phe; | |
| 4052 phe.lpData = NULL; | |
| 4053 while (HeapWalk(heap, &phe) != 0) { | |
| 4054 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && | |
| 4055 !HeapValidate(heap, 0, phe.lpData)) { | |
| 4056 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); | |
| 4057 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); | |
| 4058 fatal("corrupted C heap"); | |
| 4059 } | |
| 4060 } | |
| 4061 int err = GetLastError(); | |
| 4062 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { | |
| 4063 fatal1("heap walk aborted with error %d", err); | |
| 4064 } | |
| 4065 HeapUnlock(heap); | |
| 4066 } | |
| 4067 mallocDebugIntervalCounter = 0; | |
| 4068 } | |
| 4069 return true; | |
| 4070 } | |
| 4071 | |
| 4072 | |
| 4073 #ifndef PRODUCT | |
| 4074 bool os::find(address addr) { | |
| 4075 // Nothing yet | |
| 4076 return false; | |
| 4077 } | |
| 4078 #endif | |
| 4079 | |
| 4080 LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { | |
| 4081 DWORD exception_code = e->ExceptionRecord->ExceptionCode; | |
| 4082 | |
| 4083 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { | |
| 4084 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); | |
| 4085 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; | |
| 4086 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
| 4087 | |
| 4088 if (os::is_memory_serialize_page(thread, addr)) | |
| 4089 return EXCEPTION_CONTINUE_EXECUTION; | |
| 4090 } | |
| 4091 | |
| 4092 return EXCEPTION_CONTINUE_SEARCH; | |
| 4093 } | |
| 4094 | |
| 4095 static int getLastErrorString(char *buf, size_t len) | |
| 4096 { | |
| 4097 long errval; | |
| 4098 | |
| 4099 if ((errval = GetLastError()) != 0) | |
| 4100 { | |
| 4101 /* DOS error */ | |
| 4102 size_t n = (size_t)FormatMessage( | |
| 4103 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, | |
| 4104 NULL, | |
| 4105 errval, | |
| 4106 0, | |
| 4107 buf, | |
| 4108 (DWORD)len, | |
| 4109 NULL); | |
| 4110 if (n > 3) { | |
| 4111 /* Drop final '.', CR, LF */ | |
| 4112 if (buf[n - 1] == '\n') n--; | |
| 4113 if (buf[n - 1] == '\r') n--; | |
| 4114 if (buf[n - 1] == '.') n--; | |
| 4115 buf[n] = '\0'; | |
| 4116 } | |
| 4117 return (int)n; | |
| 4118 } | |
| 4119 | |
| 4120 if (errno != 0) | |
| 4121 { | |
| 4122 /* C runtime error that has no corresponding DOS error code */ | |
| 4123 const char *s = strerror(errno); | |
| 4124 size_t n = strlen(s); | |
| 4125 if (n >= len) n = len - 1; | |
| 4126 strncpy(buf, s, n); | |
| 4127 buf[n] = '\0'; | |
| 4128 return (int)n; | |
| 4129 } | |
| 4130 return 0; | |
| 4131 } |