Mercurial > hg > truffle
annotate src/os/windows/vm/os_windows.cpp @ 842:57c71ad0341b jdk7-b66
Added tag jdk7-b65 for changeset ba313800759b
author | xdono |
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date | Thu, 16 Jul 2009 10:53:09 -0700 |
parents | c8152ae3f339 |
children | 8c79517a9300 |
rev | line source |
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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 | |
548
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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() { | |
619 // FIXME: GlobalMemoryStatus() may return incorrect value if total memory | |
620 // is larger than 4GB | |
621 MEMORYSTATUS ms; | |
622 GlobalMemoryStatus(&ms); | |
623 | |
624 return (julong)ms.dwAvailPhys; | |
625 } | |
626 | |
627 julong os::physical_memory() { | |
628 return win32::physical_memory(); | |
629 } | |
630 | |
631 julong os::allocatable_physical_memory(julong size) { | |
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632 #ifdef _LP64 |
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633 return size; |
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634 #else |
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635 // Limit to 1400m because of the 2gb address space wall |
0 | 636 return MIN2(size, (julong)1400*M); |
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637 #endif |
0 | 638 } |
639 | |
640 // VC6 lacks DWORD_PTR | |
641 #if _MSC_VER < 1300 | |
642 typedef UINT_PTR DWORD_PTR; | |
643 #endif | |
644 | |
645 int os::active_processor_count() { | |
646 DWORD_PTR lpProcessAffinityMask = 0; | |
647 DWORD_PTR lpSystemAffinityMask = 0; | |
648 int proc_count = processor_count(); | |
649 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && | |
650 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { | |
651 // Nof active processors is number of bits in process affinity mask | |
652 int bitcount = 0; | |
653 while (lpProcessAffinityMask != 0) { | |
654 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); | |
655 bitcount++; | |
656 } | |
657 return bitcount; | |
658 } else { | |
659 return proc_count; | |
660 } | |
661 } | |
662 | |
663 bool os::distribute_processes(uint length, uint* distribution) { | |
664 // Not yet implemented. | |
665 return false; | |
666 } | |
667 | |
668 bool os::bind_to_processor(uint processor_id) { | |
669 // Not yet implemented. | |
670 return false; | |
671 } | |
672 | |
673 static void initialize_performance_counter() { | |
674 LARGE_INTEGER count; | |
675 if (QueryPerformanceFrequency(&count)) { | |
676 has_performance_count = 1; | |
677 performance_frequency = as_long(count); | |
678 QueryPerformanceCounter(&count); | |
679 initial_performance_count = as_long(count); | |
680 } else { | |
681 has_performance_count = 0; | |
682 FILETIME wt; | |
683 GetSystemTimeAsFileTime(&wt); | |
684 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); | |
685 } | |
686 } | |
687 | |
688 | |
689 double os::elapsedTime() { | |
690 return (double) elapsed_counter() / (double) elapsed_frequency(); | |
691 } | |
692 | |
693 | |
694 // Windows format: | |
695 // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. | |
696 // Java format: | |
697 // Java standards require the number of milliseconds since 1/1/1970 | |
698 | |
699 // Constant offset - calculated using offset() | |
700 static jlong _offset = 116444736000000000; | |
701 // Fake time counter for reproducible results when debugging | |
702 static jlong fake_time = 0; | |
703 | |
704 #ifdef ASSERT | |
705 // Just to be safe, recalculate the offset in debug mode | |
706 static jlong _calculated_offset = 0; | |
707 static int _has_calculated_offset = 0; | |
708 | |
709 jlong offset() { | |
710 if (_has_calculated_offset) return _calculated_offset; | |
711 SYSTEMTIME java_origin; | |
712 java_origin.wYear = 1970; | |
713 java_origin.wMonth = 1; | |
714 java_origin.wDayOfWeek = 0; // ignored | |
715 java_origin.wDay = 1; | |
716 java_origin.wHour = 0; | |
717 java_origin.wMinute = 0; | |
718 java_origin.wSecond = 0; | |
719 java_origin.wMilliseconds = 0; | |
720 FILETIME jot; | |
721 if (!SystemTimeToFileTime(&java_origin, &jot)) { | |
722 fatal1("Error = %d\nWindows error", GetLastError()); | |
723 } | |
724 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); | |
725 _has_calculated_offset = 1; | |
726 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); | |
727 return _calculated_offset; | |
728 } | |
729 #else | |
730 jlong offset() { | |
731 return _offset; | |
732 } | |
733 #endif | |
734 | |
735 jlong windows_to_java_time(FILETIME wt) { | |
736 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); | |
737 return (a - offset()) / 10000; | |
738 } | |
739 | |
740 FILETIME java_to_windows_time(jlong l) { | |
741 jlong a = (l * 10000) + offset(); | |
742 FILETIME result; | |
743 result.dwHighDateTime = high(a); | |
744 result.dwLowDateTime = low(a); | |
745 return result; | |
746 } | |
747 | |
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748 // For now, we say that Windows does not support vtime. I have no idea |
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749 // whether it can actually be made to (DLD, 9/13/05). |
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750 |
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751 bool os::supports_vtime() { return false; } |
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752 bool os::enable_vtime() { return false; } |
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753 bool os::vtime_enabled() { return false; } |
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754 double os::elapsedVTime() { |
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755 // better than nothing, but not much |
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756 return elapsedTime(); |
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757 } |
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758 |
0 | 759 jlong os::javaTimeMillis() { |
760 if (UseFakeTimers) { | |
761 return fake_time++; | |
762 } else { | |
61 | 763 FILETIME wt; |
764 GetSystemTimeAsFileTime(&wt); | |
765 return windows_to_java_time(wt); | |
0 | 766 } |
767 } | |
768 | |
769 #define NANOS_PER_SEC CONST64(1000000000) | |
770 #define NANOS_PER_MILLISEC 1000000 | |
771 jlong os::javaTimeNanos() { | |
772 if (!has_performance_count) { | |
773 return javaTimeMillis() * NANOS_PER_MILLISEC; // the best we can do. | |
774 } else { | |
775 LARGE_INTEGER current_count; | |
776 QueryPerformanceCounter(¤t_count); | |
777 double current = as_long(current_count); | |
778 double freq = performance_frequency; | |
779 jlong time = (jlong)((current/freq) * NANOS_PER_SEC); | |
780 return time; | |
781 } | |
782 } | |
783 | |
784 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
785 if (!has_performance_count) { | |
786 // javaTimeMillis() doesn't have much percision, | |
787 // but it is not going to wrap -- so all 64 bits | |
788 info_ptr->max_value = ALL_64_BITS; | |
789 | |
790 // this is a wall clock timer, so may skip | |
791 info_ptr->may_skip_backward = true; | |
792 info_ptr->may_skip_forward = true; | |
793 } else { | |
794 jlong freq = performance_frequency; | |
795 if (freq < NANOS_PER_SEC) { | |
796 // the performance counter is 64 bits and we will | |
797 // be multiplying it -- so no wrap in 64 bits | |
798 info_ptr->max_value = ALL_64_BITS; | |
799 } else if (freq > NANOS_PER_SEC) { | |
800 // use the max value the counter can reach to | |
801 // determine the max value which could be returned | |
802 julong max_counter = (julong)ALL_64_BITS; | |
803 info_ptr->max_value = (jlong)(max_counter / (freq / NANOS_PER_SEC)); | |
804 } else { | |
805 // the performance counter is 64 bits and we will | |
806 // be using it directly -- so no wrap in 64 bits | |
807 info_ptr->max_value = ALL_64_BITS; | |
808 } | |
809 | |
810 // using a counter, so no skipping | |
811 info_ptr->may_skip_backward = false; | |
812 info_ptr->may_skip_forward = false; | |
813 } | |
814 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
815 } | |
816 | |
817 char* os::local_time_string(char *buf, size_t buflen) { | |
818 SYSTEMTIME st; | |
819 GetLocalTime(&st); | |
820 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
821 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); | |
822 return buf; | |
823 } | |
824 | |
825 bool os::getTimesSecs(double* process_real_time, | |
826 double* process_user_time, | |
827 double* process_system_time) { | |
828 HANDLE h_process = GetCurrentProcess(); | |
829 FILETIME create_time, exit_time, kernel_time, user_time; | |
830 BOOL result = GetProcessTimes(h_process, | |
831 &create_time, | |
832 &exit_time, | |
833 &kernel_time, | |
834 &user_time); | |
835 if (result != 0) { | |
836 FILETIME wt; | |
837 GetSystemTimeAsFileTime(&wt); | |
838 jlong rtc_millis = windows_to_java_time(wt); | |
839 jlong user_millis = windows_to_java_time(user_time); | |
840 jlong system_millis = windows_to_java_time(kernel_time); | |
841 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); | |
842 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); | |
843 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); | |
844 return true; | |
845 } else { | |
846 return false; | |
847 } | |
848 } | |
849 | |
850 void os::shutdown() { | |
851 | |
852 // allow PerfMemory to attempt cleanup of any persistent resources | |
853 perfMemory_exit(); | |
854 | |
855 // flush buffered output, finish log files | |
856 ostream_abort(); | |
857 | |
858 // Check for abort hook | |
859 abort_hook_t abort_hook = Arguments::abort_hook(); | |
860 if (abort_hook != NULL) { | |
861 abort_hook(); | |
862 } | |
863 } | |
864 | |
865 void os::abort(bool dump_core) | |
866 { | |
867 os::shutdown(); | |
868 // no core dump on Windows | |
869 ::exit(1); | |
870 } | |
871 | |
872 // Die immediately, no exit hook, no abort hook, no cleanup. | |
873 void os::die() { | |
874 _exit(-1); | |
875 } | |
876 | |
877 // Directory routines copied from src/win32/native/java/io/dirent_md.c | |
878 // * dirent_md.c 1.15 00/02/02 | |
879 // | |
880 // The declarations for DIR and struct dirent are in jvm_win32.h. | |
881 | |
882 /* Caller must have already run dirname through JVM_NativePath, which removes | |
883 duplicate slashes and converts all instances of '/' into '\\'. */ | |
884 | |
885 DIR * | |
886 os::opendir(const char *dirname) | |
887 { | |
888 assert(dirname != NULL, "just checking"); // hotspot change | |
889 DIR *dirp = (DIR *)malloc(sizeof(DIR)); | |
890 DWORD fattr; // hotspot change | |
891 char alt_dirname[4] = { 0, 0, 0, 0 }; | |
892 | |
893 if (dirp == 0) { | |
894 errno = ENOMEM; | |
895 return 0; | |
896 } | |
897 | |
898 /* | |
899 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it | |
900 * as a directory in FindFirstFile(). We detect this case here and | |
901 * prepend the current drive name. | |
902 */ | |
903 if (dirname[1] == '\0' && dirname[0] == '\\') { | |
904 alt_dirname[0] = _getdrive() + 'A' - 1; | |
905 alt_dirname[1] = ':'; | |
906 alt_dirname[2] = '\\'; | |
907 alt_dirname[3] = '\0'; | |
908 dirname = alt_dirname; | |
909 } | |
910 | |
911 dirp->path = (char *)malloc(strlen(dirname) + 5); | |
912 if (dirp->path == 0) { | |
913 free(dirp); | |
914 errno = ENOMEM; | |
915 return 0; | |
916 } | |
917 strcpy(dirp->path, dirname); | |
918 | |
919 fattr = GetFileAttributes(dirp->path); | |
920 if (fattr == 0xffffffff) { | |
921 free(dirp->path); | |
922 free(dirp); | |
923 errno = ENOENT; | |
924 return 0; | |
925 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { | |
926 free(dirp->path); | |
927 free(dirp); | |
928 errno = ENOTDIR; | |
929 return 0; | |
930 } | |
931 | |
932 /* Append "*.*", or possibly "\\*.*", to path */ | |
933 if (dirp->path[1] == ':' | |
934 && (dirp->path[2] == '\0' | |
935 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { | |
936 /* No '\\' needed for cases like "Z:" or "Z:\" */ | |
937 strcat(dirp->path, "*.*"); | |
938 } else { | |
939 strcat(dirp->path, "\\*.*"); | |
940 } | |
941 | |
942 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); | |
943 if (dirp->handle == INVALID_HANDLE_VALUE) { | |
944 if (GetLastError() != ERROR_FILE_NOT_FOUND) { | |
945 free(dirp->path); | |
946 free(dirp); | |
947 errno = EACCES; | |
948 return 0; | |
949 } | |
950 } | |
951 return dirp; | |
952 } | |
953 | |
954 /* parameter dbuf unused on Windows */ | |
955 | |
956 struct dirent * | |
957 os::readdir(DIR *dirp, dirent *dbuf) | |
958 { | |
959 assert(dirp != NULL, "just checking"); // hotspot change | |
960 if (dirp->handle == INVALID_HANDLE_VALUE) { | |
961 return 0; | |
962 } | |
963 | |
964 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); | |
965 | |
966 if (!FindNextFile(dirp->handle, &dirp->find_data)) { | |
967 if (GetLastError() == ERROR_INVALID_HANDLE) { | |
968 errno = EBADF; | |
969 return 0; | |
970 } | |
971 FindClose(dirp->handle); | |
972 dirp->handle = INVALID_HANDLE_VALUE; | |
973 } | |
974 | |
975 return &dirp->dirent; | |
976 } | |
977 | |
978 int | |
979 os::closedir(DIR *dirp) | |
980 { | |
981 assert(dirp != NULL, "just checking"); // hotspot change | |
982 if (dirp->handle != INVALID_HANDLE_VALUE) { | |
983 if (!FindClose(dirp->handle)) { | |
984 errno = EBADF; | |
985 return -1; | |
986 } | |
987 dirp->handle = INVALID_HANDLE_VALUE; | |
988 } | |
989 free(dirp->path); | |
990 free(dirp); | |
991 return 0; | |
992 } | |
993 | |
994 const char* os::dll_file_extension() { return ".dll"; } | |
995 | |
996 const char * os::get_temp_directory() | |
997 { | |
998 static char path_buf[MAX_PATH]; | |
999 if (GetTempPath(MAX_PATH, path_buf)>0) | |
1000 return path_buf; | |
1001 else{ | |
1002 path_buf[0]='\0'; | |
1003 return path_buf; | |
1004 } | |
1005 } | |
1006 | |
691 | 1007 static bool file_exists(const char* filename) { |
1008 if (filename == NULL || strlen(filename) == 0) { | |
1009 return false; | |
1010 } | |
1011 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; | |
1012 } | |
1013 | |
1014 void os::dll_build_name(char *buffer, size_t buflen, | |
1015 const char* pname, const char* fname) { | |
1016 // Copied from libhpi | |
1017 const size_t pnamelen = pname ? strlen(pname) : 0; | |
1018 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; | |
1019 | |
1020 // Quietly truncates on buffer overflow. Should be an error. | |
1021 if (pnamelen + strlen(fname) + 10 > buflen) { | |
1022 *buffer = '\0'; | |
1023 return; | |
1024 } | |
1025 | |
1026 if (pnamelen == 0) { | |
1027 jio_snprintf(buffer, buflen, "%s.dll", fname); | |
1028 } else if (c == ':' || c == '\\') { | |
1029 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); | |
1030 } else if (strchr(pname, *os::path_separator()) != NULL) { | |
1031 int n; | |
1032 char** pelements = split_path(pname, &n); | |
1033 for (int i = 0 ; i < n ; i++) { | |
1034 char* path = pelements[i]; | |
1035 // Really shouldn't be NULL, but check can't hurt | |
1036 size_t plen = (path == NULL) ? 0 : strlen(path); | |
1037 if (plen == 0) { | |
1038 continue; // skip the empty path values | |
1039 } | |
1040 const char lastchar = path[plen - 1]; | |
1041 if (lastchar == ':' || lastchar == '\\') { | |
1042 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); | |
1043 } else { | |
1044 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); | |
1045 } | |
1046 if (file_exists(buffer)) { | |
1047 break; | |
1048 } | |
242 | 1049 } |
691 | 1050 // release the storage |
1051 for (int i = 0 ; i < n ; i++) { | |
1052 if (pelements[i] != NULL) { | |
1053 FREE_C_HEAP_ARRAY(char, pelements[i]); | |
1054 } | |
242 | 1055 } |
691 | 1056 if (pelements != NULL) { |
1057 FREE_C_HEAP_ARRAY(char*, pelements); | |
1058 } | |
1059 } else { | |
1060 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); | |
1061 } | |
242 | 1062 } |
1063 | |
0 | 1064 // Needs to be in os specific directory because windows requires another |
1065 // header file <direct.h> | |
1066 const char* os::get_current_directory(char *buf, int buflen) { | |
1067 return _getcwd(buf, buflen); | |
1068 } | |
1069 | |
1070 //----------------------------------------------------------- | |
1071 // Helper functions for fatal error handler | |
1072 | |
1073 // The following library functions are resolved dynamically at runtime: | |
1074 | |
1075 // PSAPI functions, for Windows NT, 2000, XP | |
1076 | |
1077 // psapi.h doesn't come with Visual Studio 6; it can be downloaded as Platform | |
1078 // SDK from Microsoft. Here are the definitions copied from psapi.h | |
1079 typedef struct _MODULEINFO { | |
1080 LPVOID lpBaseOfDll; | |
1081 DWORD SizeOfImage; | |
1082 LPVOID EntryPoint; | |
1083 } MODULEINFO, *LPMODULEINFO; | |
1084 | |
1085 static BOOL (WINAPI *_EnumProcessModules) ( HANDLE, HMODULE *, DWORD, LPDWORD ); | |
1086 static DWORD (WINAPI *_GetModuleFileNameEx) ( HANDLE, HMODULE, LPTSTR, DWORD ); | |
1087 static BOOL (WINAPI *_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD ); | |
1088 | |
1089 // ToolHelp Functions, for Windows 95, 98 and ME | |
1090 | |
1091 static HANDLE(WINAPI *_CreateToolhelp32Snapshot)(DWORD,DWORD) ; | |
1092 static BOOL (WINAPI *_Module32First) (HANDLE,LPMODULEENTRY32) ; | |
1093 static BOOL (WINAPI *_Module32Next) (HANDLE,LPMODULEENTRY32) ; | |
1094 | |
1095 bool _has_psapi; | |
1096 bool _psapi_init = false; | |
1097 bool _has_toolhelp; | |
1098 | |
1099 static bool _init_psapi() { | |
1100 HINSTANCE psapi = LoadLibrary( "PSAPI.DLL" ) ; | |
1101 if( psapi == NULL ) return false ; | |
1102 | |
1103 _EnumProcessModules = CAST_TO_FN_PTR( | |
1104 BOOL(WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD), | |
1105 GetProcAddress(psapi, "EnumProcessModules")) ; | |
1106 _GetModuleFileNameEx = CAST_TO_FN_PTR( | |
1107 DWORD (WINAPI *)(HANDLE, HMODULE, LPTSTR, DWORD), | |
1108 GetProcAddress(psapi, "GetModuleFileNameExA")); | |
1109 _GetModuleInformation = CAST_TO_FN_PTR( | |
1110 BOOL (WINAPI *)(HANDLE, HMODULE, LPMODULEINFO, DWORD), | |
1111 GetProcAddress(psapi, "GetModuleInformation")); | |
1112 | |
1113 _has_psapi = (_EnumProcessModules && _GetModuleFileNameEx && _GetModuleInformation); | |
1114 _psapi_init = true; | |
1115 return _has_psapi; | |
1116 } | |
1117 | |
1118 static bool _init_toolhelp() { | |
1119 HINSTANCE kernel32 = LoadLibrary("Kernel32.DLL") ; | |
1120 if (kernel32 == NULL) return false ; | |
1121 | |
1122 _CreateToolhelp32Snapshot = CAST_TO_FN_PTR( | |
1123 HANDLE(WINAPI *)(DWORD,DWORD), | |
1124 GetProcAddress(kernel32, "CreateToolhelp32Snapshot")); | |
1125 _Module32First = CAST_TO_FN_PTR( | |
1126 BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), | |
1127 GetProcAddress(kernel32, "Module32First" )); | |
1128 _Module32Next = CAST_TO_FN_PTR( | |
1129 BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), | |
1130 GetProcAddress(kernel32, "Module32Next" )); | |
1131 | |
1132 _has_toolhelp = (_CreateToolhelp32Snapshot && _Module32First && _Module32Next); | |
1133 return _has_toolhelp; | |
1134 } | |
1135 | |
1136 #ifdef _WIN64 | |
1137 // Helper routine which returns true if address in | |
1138 // within the NTDLL address space. | |
1139 // | |
1140 static bool _addr_in_ntdll( address addr ) | |
1141 { | |
1142 HMODULE hmod; | |
1143 MODULEINFO minfo; | |
1144 | |
1145 hmod = GetModuleHandle("NTDLL.DLL"); | |
1146 if ( hmod == NULL ) return false; | |
1147 if ( !_GetModuleInformation( GetCurrentProcess(), hmod, | |
1148 &minfo, sizeof(MODULEINFO)) ) | |
1149 return false; | |
1150 | |
1151 if ( (addr >= minfo.lpBaseOfDll) && | |
1152 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) | |
1153 return true; | |
1154 else | |
1155 return false; | |
1156 } | |
1157 #endif | |
1158 | |
1159 | |
1160 // Enumerate all modules for a given process ID | |
1161 // | |
1162 // Notice that Windows 95/98/Me and Windows NT/2000/XP have | |
1163 // different API for doing this. We use PSAPI.DLL on NT based | |
1164 // Windows and ToolHelp on 95/98/Me. | |
1165 | |
1166 // Callback function that is called by enumerate_modules() on | |
1167 // every DLL module. | |
1168 // Input parameters: | |
1169 // int pid, | |
1170 // char* module_file_name, | |
1171 // address module_base_addr, | |
1172 // unsigned module_size, | |
1173 // void* param | |
1174 typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); | |
1175 | |
1176 // enumerate_modules for Windows NT, using PSAPI | |
1177 static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) | |
1178 { | |
1179 HANDLE hProcess ; | |
1180 | |
1181 # define MAX_NUM_MODULES 128 | |
1182 HMODULE modules[MAX_NUM_MODULES]; | |
1183 static char filename[ MAX_PATH ]; | |
1184 int result = 0; | |
1185 | |
1186 if (!_has_psapi && (_psapi_init || !_init_psapi())) return 0; | |
1187 | |
1188 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, | |
1189 FALSE, pid ) ; | |
1190 if (hProcess == NULL) return 0; | |
1191 | |
1192 DWORD size_needed; | |
1193 if (!_EnumProcessModules(hProcess, modules, | |
1194 sizeof(modules), &size_needed)) { | |
1195 CloseHandle( hProcess ); | |
1196 return 0; | |
1197 } | |
1198 | |
1199 // number of modules that are currently loaded | |
1200 int num_modules = size_needed / sizeof(HMODULE); | |
1201 | |
1202 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { | |
1203 // Get Full pathname: | |
1204 if(!_GetModuleFileNameEx(hProcess, modules[i], | |
1205 filename, sizeof(filename))) { | |
1206 filename[0] = '\0'; | |
1207 } | |
1208 | |
1209 MODULEINFO modinfo; | |
1210 if (!_GetModuleInformation(hProcess, modules[i], | |
1211 &modinfo, sizeof(modinfo))) { | |
1212 modinfo.lpBaseOfDll = NULL; | |
1213 modinfo.SizeOfImage = 0; | |
1214 } | |
1215 | |
1216 // Invoke callback function | |
1217 result = func(pid, filename, (address)modinfo.lpBaseOfDll, | |
1218 modinfo.SizeOfImage, param); | |
1219 if (result) break; | |
1220 } | |
1221 | |
1222 CloseHandle( hProcess ) ; | |
1223 return result; | |
1224 } | |
1225 | |
1226 | |
1227 // enumerate_modules for Windows 95/98/ME, using TOOLHELP | |
1228 static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) | |
1229 { | |
1230 HANDLE hSnapShot ; | |
1231 static MODULEENTRY32 modentry ; | |
1232 int result = 0; | |
1233 | |
1234 if (!_has_toolhelp) return 0; | |
1235 | |
1236 // Get a handle to a Toolhelp snapshot of the system | |
1237 hSnapShot = _CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; | |
1238 if( hSnapShot == INVALID_HANDLE_VALUE ) { | |
1239 return FALSE ; | |
1240 } | |
1241 | |
1242 // iterate through all modules | |
1243 modentry.dwSize = sizeof(MODULEENTRY32) ; | |
1244 bool not_done = _Module32First( hSnapShot, &modentry ) != 0; | |
1245 | |
1246 while( not_done ) { | |
1247 // invoke the callback | |
1248 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, | |
1249 modentry.modBaseSize, param); | |
1250 if (result) break; | |
1251 | |
1252 modentry.dwSize = sizeof(MODULEENTRY32) ; | |
1253 not_done = _Module32Next( hSnapShot, &modentry ) != 0; | |
1254 } | |
1255 | |
1256 CloseHandle(hSnapShot); | |
1257 return result; | |
1258 } | |
1259 | |
1260 int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) | |
1261 { | |
1262 // Get current process ID if caller doesn't provide it. | |
1263 if (!pid) pid = os::current_process_id(); | |
1264 | |
1265 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); | |
1266 else return _enumerate_modules_windows(pid, func, param); | |
1267 } | |
1268 | |
1269 struct _modinfo { | |
1270 address addr; | |
1271 char* full_path; // point to a char buffer | |
1272 int buflen; // size of the buffer | |
1273 address base_addr; | |
1274 }; | |
1275 | |
1276 static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, | |
1277 unsigned size, void * param) { | |
1278 struct _modinfo *pmod = (struct _modinfo *)param; | |
1279 if (!pmod) return -1; | |
1280 | |
1281 if (base_addr <= pmod->addr && | |
1282 base_addr+size > pmod->addr) { | |
1283 // if a buffer is provided, copy path name to the buffer | |
1284 if (pmod->full_path) { | |
1285 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); | |
1286 } | |
1287 pmod->base_addr = base_addr; | |
1288 return 1; | |
1289 } | |
1290 return 0; | |
1291 } | |
1292 | |
1293 bool os::dll_address_to_library_name(address addr, char* buf, | |
1294 int buflen, int* offset) { | |
1295 // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always | |
1296 // return the full path to the DLL file, sometimes it returns path | |
1297 // to the corresponding PDB file (debug info); sometimes it only | |
1298 // returns partial path, which makes life painful. | |
1299 | |
1300 struct _modinfo mi; | |
1301 mi.addr = addr; | |
1302 mi.full_path = buf; | |
1303 mi.buflen = buflen; | |
1304 int pid = os::current_process_id(); | |
1305 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { | |
1306 // buf already contains path name | |
1307 if (offset) *offset = addr - mi.base_addr; | |
1308 return true; | |
1309 } else { | |
1310 if (buf) buf[0] = '\0'; | |
1311 if (offset) *offset = -1; | |
1312 return false; | |
1313 } | |
1314 } | |
1315 | |
1316 bool os::dll_address_to_function_name(address addr, char *buf, | |
1317 int buflen, int *offset) { | |
1318 // Unimplemented on Windows - in order to use SymGetSymFromAddr(), | |
1319 // we need to initialize imagehlp/dbghelp, then load symbol table | |
1320 // for every module. That's too much work to do after a fatal error. | |
1321 // For an example on how to implement this function, see 1.4.2. | |
1322 if (offset) *offset = -1; | |
1323 if (buf) buf[0] = '\0'; | |
1324 return false; | |
1325 } | |
1326 | |
242 | 1327 void* os::dll_lookup(void* handle, const char* name) { |
1328 return GetProcAddress((HMODULE)handle, name); | |
1329 } | |
1330 | |
0 | 1331 // save the start and end address of jvm.dll into param[0] and param[1] |
1332 static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, | |
1333 unsigned size, void * param) { | |
1334 if (!param) return -1; | |
1335 | |
1336 if (base_addr <= (address)_locate_jvm_dll && | |
1337 base_addr+size > (address)_locate_jvm_dll) { | |
1338 ((address*)param)[0] = base_addr; | |
1339 ((address*)param)[1] = base_addr + size; | |
1340 return 1; | |
1341 } | |
1342 return 0; | |
1343 } | |
1344 | |
1345 address vm_lib_location[2]; // start and end address of jvm.dll | |
1346 | |
1347 // check if addr is inside jvm.dll | |
1348 bool os::address_is_in_vm(address addr) { | |
1349 if (!vm_lib_location[0] || !vm_lib_location[1]) { | |
1350 int pid = os::current_process_id(); | |
1351 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { | |
1352 assert(false, "Can't find jvm module."); | |
1353 return false; | |
1354 } | |
1355 } | |
1356 | |
1357 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); | |
1358 } | |
1359 | |
1360 // print module info; param is outputStream* | |
1361 static int _print_module(int pid, char* fname, address base, | |
1362 unsigned size, void* param) { | |
1363 if (!param) return -1; | |
1364 | |
1365 outputStream* st = (outputStream*)param; | |
1366 | |
1367 address end_addr = base + size; | |
1368 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); | |
1369 return 0; | |
1370 } | |
1371 | |
1372 // Loads .dll/.so and | |
1373 // in case of error it checks if .dll/.so was built for the | |
1374 // same architecture as Hotspot is running on | |
1375 void * os::dll_load(const char *name, char *ebuf, int ebuflen) | |
1376 { | |
1377 void * result = LoadLibrary(name); | |
1378 if (result != NULL) | |
1379 { | |
1380 return result; | |
1381 } | |
1382 | |
1383 long errcode = GetLastError(); | |
1384 if (errcode == ERROR_MOD_NOT_FOUND) { | |
1385 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); | |
1386 ebuf[ebuflen-1]='\0'; | |
1387 return NULL; | |
1388 } | |
1389 | |
1390 // Parsing dll below | |
1391 // If we can read dll-info and find that dll was built | |
1392 // for an architecture other than Hotspot is running in | |
1393 // - then print to buffer "DLL was built for a different architecture" | |
1394 // else call getLastErrorString to obtain system error message | |
1395 | |
1396 // Read system error message into ebuf | |
1397 // It may or may not be overwritten below (in the for loop and just above) | |
1398 getLastErrorString(ebuf, (size_t) ebuflen); | |
1399 ebuf[ebuflen-1]='\0'; | |
1400 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); | |
1401 if (file_descriptor<0) | |
1402 { | |
1403 return NULL; | |
1404 } | |
1405 | |
1406 uint32_t signature_offset; | |
1407 uint16_t lib_arch=0; | |
1408 bool failed_to_get_lib_arch= | |
1409 ( | |
1410 //Go to position 3c in the dll | |
1411 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) | |
1412 || | |
1413 // Read loacation of signature | |
1414 (sizeof(signature_offset)!= | |
1415 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) | |
1416 || | |
1417 //Go to COFF File Header in dll | |
1418 //that is located after"signature" (4 bytes long) | |
1419 (os::seek_to_file_offset(file_descriptor, | |
1420 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) | |
1421 || | |
1422 //Read field that contains code of architecture | |
1423 // that dll was build for | |
1424 (sizeof(lib_arch)!= | |
1425 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) | |
1426 ); | |
1427 | |
1428 ::close(file_descriptor); | |
1429 if (failed_to_get_lib_arch) | |
1430 { | |
1431 // file i/o error - report getLastErrorString(...) msg | |
1432 return NULL; | |
1433 } | |
1434 | |
1435 typedef struct | |
1436 { | |
1437 uint16_t arch_code; | |
1438 char* arch_name; | |
1439 } arch_t; | |
1440 | |
1441 static const arch_t arch_array[]={ | |
1442 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, | |
1443 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, | |
1444 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} | |
1445 }; | |
1446 #if (defined _M_IA64) | |
1447 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; | |
1448 #elif (defined _M_AMD64) | |
1449 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; | |
1450 #elif (defined _M_IX86) | |
1451 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; | |
1452 #else | |
1453 #error Method os::dll_load requires that one of following \ | |
1454 is defined :_M_IA64,_M_AMD64 or _M_IX86 | |
1455 #endif | |
1456 | |
1457 | |
1458 // Obtain a string for printf operation | |
1459 // lib_arch_str shall contain string what platform this .dll was built for | |
1460 // running_arch_str shall string contain what platform Hotspot was built for | |
1461 char *running_arch_str=NULL,*lib_arch_str=NULL; | |
1462 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) | |
1463 { | |
1464 if (lib_arch==arch_array[i].arch_code) | |
1465 lib_arch_str=arch_array[i].arch_name; | |
1466 if (running_arch==arch_array[i].arch_code) | |
1467 running_arch_str=arch_array[i].arch_name; | |
1468 } | |
1469 | |
1470 assert(running_arch_str, | |
1471 "Didn't find runing architecture code in arch_array"); | |
1472 | |
1473 // If the architure is right | |
1474 // but some other error took place - report getLastErrorString(...) msg | |
1475 if (lib_arch == running_arch) | |
1476 { | |
1477 return NULL; | |
1478 } | |
1479 | |
1480 if (lib_arch_str!=NULL) | |
1481 { | |
1482 ::_snprintf(ebuf, ebuflen-1, | |
1483 "Can't load %s-bit .dll on a %s-bit platform", | |
1484 lib_arch_str,running_arch_str); | |
1485 } | |
1486 else | |
1487 { | |
1488 // don't know what architecture this dll was build for | |
1489 ::_snprintf(ebuf, ebuflen-1, | |
1490 "Can't load this .dll (machine code=0x%x) on a %s-bit platform", | |
1491 lib_arch,running_arch_str); | |
1492 } | |
1493 | |
1494 return NULL; | |
1495 } | |
1496 | |
1497 | |
1498 void os::print_dll_info(outputStream *st) { | |
1499 int pid = os::current_process_id(); | |
1500 st->print_cr("Dynamic libraries:"); | |
1501 enumerate_modules(pid, _print_module, (void *)st); | |
1502 } | |
1503 | |
273
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1504 // function pointer to Windows API "GetNativeSystemInfo". |
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1505 typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO); |
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1506 static GetNativeSystemInfo_func_type _GetNativeSystemInfo; |
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1507 |
0 | 1508 void os::print_os_info(outputStream* st) { |
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1509 st->print("OS:"); |
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1510 |
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1511 OSVERSIONINFOEX osvi; |
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1512 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); |
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1513 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); |
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1514 |
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1515 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { |
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1516 st->print_cr("N/A"); |
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1517 return; |
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1518 } |
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1519 |
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1520 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; |
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1521 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { |
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1522 switch (os_vers) { |
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1523 case 3051: st->print(" Windows NT 3.51"); break; |
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1524 case 4000: st->print(" Windows NT 4.0"); break; |
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1525 case 5000: st->print(" Windows 2000"); break; |
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1526 case 5001: st->print(" Windows XP"); break; |
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1527 case 5002: |
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1528 case 6000: { |
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1529 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could |
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1530 // find out whether we are running on 64 bit processor or not. |
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1531 SYSTEM_INFO si; |
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1532 ZeroMemory(&si, sizeof(SYSTEM_INFO)); |
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1533 // Check to see if _GetNativeSystemInfo has been initialized. |
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1534 if (_GetNativeSystemInfo == NULL) { |
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1535 HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll")); |
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1536 _GetNativeSystemInfo = |
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1537 CAST_TO_FN_PTR(GetNativeSystemInfo_func_type, |
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1538 GetProcAddress(hKernel32, |
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1539 "GetNativeSystemInfo")); |
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1540 if (_GetNativeSystemInfo == NULL) |
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1541 GetSystemInfo(&si); |
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1542 } else { |
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1543 _GetNativeSystemInfo(&si); |
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1544 } |
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1545 if (os_vers == 5002) { |
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1546 if (osvi.wProductType == VER_NT_WORKSTATION && |
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1547 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) |
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1548 st->print(" Windows XP x64 Edition"); |
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1549 else |
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1550 st->print(" Windows Server 2003 family"); |
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1551 } else { // os_vers == 6000 |
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1552 if (osvi.wProductType == VER_NT_WORKSTATION) |
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1553 st->print(" Windows Vista"); |
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1554 else |
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1555 st->print(" Windows Server 2008"); |
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1556 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) |
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1557 st->print(" , 64 bit"); |
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1558 } |
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1559 break; |
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1560 } |
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1561 default: // future windows, print out its major and minor versions |
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1562 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); |
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1563 } |
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1564 } else { |
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1565 switch (os_vers) { |
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1566 case 4000: st->print(" Windows 95"); break; |
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1567 case 4010: st->print(" Windows 98"); break; |
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1568 case 4090: st->print(" Windows Me"); break; |
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1569 default: // future windows, print out its major and minor versions |
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1570 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); |
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1571 } |
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1572 } |
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1573 st->print(" Build %d", osvi.dwBuildNumber); |
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1574 st->print(" %s", osvi.szCSDVersion); // service pack |
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1575 st->cr(); |
0 | 1576 } |
1577 | |
1578 void os::print_memory_info(outputStream* st) { | |
1579 st->print("Memory:"); | |
1580 st->print(" %dk page", os::vm_page_size()>>10); | |
1581 | |
1582 // FIXME: GlobalMemoryStatus() may return incorrect value if total memory | |
1583 // is larger than 4GB | |
1584 MEMORYSTATUS ms; | |
1585 GlobalMemoryStatus(&ms); | |
1586 | |
1587 st->print(", physical %uk", os::physical_memory() >> 10); | |
1588 st->print("(%uk free)", os::available_memory() >> 10); | |
1589 | |
1590 st->print(", swap %uk", ms.dwTotalPageFile >> 10); | |
1591 st->print("(%uk free)", ms.dwAvailPageFile >> 10); | |
1592 st->cr(); | |
1593 } | |
1594 | |
1595 void os::print_siginfo(outputStream *st, void *siginfo) { | |
1596 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; | |
1597 st->print("siginfo:"); | |
1598 st->print(" ExceptionCode=0x%x", er->ExceptionCode); | |
1599 | |
1600 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && | |
1601 er->NumberParameters >= 2) { | |
1602 switch (er->ExceptionInformation[0]) { | |
1603 case 0: st->print(", reading address"); break; | |
1604 case 1: st->print(", writing address"); break; | |
1605 default: st->print(", ExceptionInformation=" INTPTR_FORMAT, | |
1606 er->ExceptionInformation[0]); | |
1607 } | |
1608 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); | |
1609 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && | |
1610 er->NumberParameters >= 2 && UseSharedSpaces) { | |
1611 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
1612 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { | |
1613 st->print("\n\nError accessing class data sharing archive." \ | |
1614 " Mapped file inaccessible during execution, " \ | |
1615 " possible disk/network problem."); | |
1616 } | |
1617 } else { | |
1618 int num = er->NumberParameters; | |
1619 if (num > 0) { | |
1620 st->print(", ExceptionInformation="); | |
1621 for (int i = 0; i < num; i++) { | |
1622 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); | |
1623 } | |
1624 } | |
1625 } | |
1626 st->cr(); | |
1627 } | |
1628 | |
1629 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
1630 // do nothing | |
1631 } | |
1632 | |
1633 static char saved_jvm_path[MAX_PATH] = {0}; | |
1634 | |
1635 // Find the full path to the current module, jvm.dll or jvm_g.dll | |
1636 void os::jvm_path(char *buf, jint buflen) { | |
1637 // Error checking. | |
1638 if (buflen < MAX_PATH) { | |
1639 assert(false, "must use a large-enough buffer"); | |
1640 buf[0] = '\0'; | |
1641 return; | |
1642 } | |
1643 // Lazy resolve the path to current module. | |
1644 if (saved_jvm_path[0] != 0) { | |
1645 strcpy(buf, saved_jvm_path); | |
1646 return; | |
1647 } | |
1648 | |
1649 GetModuleFileName(vm_lib_handle, buf, buflen); | |
1650 strcpy(saved_jvm_path, buf); | |
1651 } | |
1652 | |
1653 | |
1654 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
1655 #ifndef _WIN64 | |
1656 st->print("_"); | |
1657 #endif | |
1658 } | |
1659 | |
1660 | |
1661 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
1662 #ifndef _WIN64 | |
1663 st->print("@%d", args_size * sizeof(int)); | |
1664 #endif | |
1665 } | |
1666 | |
1667 // sun.misc.Signal | |
1668 // NOTE that this is a workaround for an apparent kernel bug where if | |
1669 // a signal handler for SIGBREAK is installed then that signal handler | |
1670 // takes priority over the console control handler for CTRL_CLOSE_EVENT. | |
1671 // See bug 4416763. | |
1672 static void (*sigbreakHandler)(int) = NULL; | |
1673 | |
1674 static void UserHandler(int sig, void *siginfo, void *context) { | |
1675 os::signal_notify(sig); | |
1676 // We need to reinstate the signal handler each time... | |
1677 os::signal(sig, (void*)UserHandler); | |
1678 } | |
1679 | |
1680 void* os::user_handler() { | |
1681 return (void*) UserHandler; | |
1682 } | |
1683 | |
1684 void* os::signal(int signal_number, void* handler) { | |
1685 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { | |
1686 void (*oldHandler)(int) = sigbreakHandler; | |
1687 sigbreakHandler = (void (*)(int)) handler; | |
1688 return (void*) oldHandler; | |
1689 } else { | |
1690 return (void*)::signal(signal_number, (void (*)(int))handler); | |
1691 } | |
1692 } | |
1693 | |
1694 void os::signal_raise(int signal_number) { | |
1695 raise(signal_number); | |
1696 } | |
1697 | |
1698 // The Win32 C runtime library maps all console control events other than ^C | |
1699 // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, | |
1700 // logoff, and shutdown events. We therefore install our own console handler | |
1701 // that raises SIGTERM for the latter cases. | |
1702 // | |
1703 static BOOL WINAPI consoleHandler(DWORD event) { | |
1704 switch(event) { | |
1705 case CTRL_C_EVENT: | |
1706 if (is_error_reported()) { | |
1707 // Ctrl-C is pressed during error reporting, likely because the error | |
1708 // handler fails to abort. Let VM die immediately. | |
1709 os::die(); | |
1710 } | |
1711 | |
1712 os::signal_raise(SIGINT); | |
1713 return TRUE; | |
1714 break; | |
1715 case CTRL_BREAK_EVENT: | |
1716 if (sigbreakHandler != NULL) { | |
1717 (*sigbreakHandler)(SIGBREAK); | |
1718 } | |
1719 return TRUE; | |
1720 break; | |
1721 case CTRL_CLOSE_EVENT: | |
1722 case CTRL_LOGOFF_EVENT: | |
1723 case CTRL_SHUTDOWN_EVENT: | |
1724 os::signal_raise(SIGTERM); | |
1725 return TRUE; | |
1726 break; | |
1727 default: | |
1728 break; | |
1729 } | |
1730 return FALSE; | |
1731 } | |
1732 | |
1733 /* | |
1734 * The following code is moved from os.cpp for making this | |
1735 * code platform specific, which it is by its very nature. | |
1736 */ | |
1737 | |
1738 // Return maximum OS signal used + 1 for internal use only | |
1739 // Used as exit signal for signal_thread | |
1740 int os::sigexitnum_pd(){ | |
1741 return NSIG; | |
1742 } | |
1743 | |
1744 // a counter for each possible signal value, including signal_thread exit signal | |
1745 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
1746 static HANDLE sig_sem; | |
1747 | |
1748 void os::signal_init_pd() { | |
1749 // Initialize signal structures | |
1750 memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
1751 | |
1752 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); | |
1753 | |
1754 // Programs embedding the VM do not want it to attempt to receive | |
1755 // events like CTRL_LOGOFF_EVENT, which are used to implement the | |
1756 // shutdown hooks mechanism introduced in 1.3. For example, when | |
1757 // the VM is run as part of a Windows NT service (i.e., a servlet | |
1758 // engine in a web server), the correct behavior is for any console | |
1759 // control handler to return FALSE, not TRUE, because the OS's | |
1760 // "final" handler for such events allows the process to continue if | |
1761 // it is a service (while terminating it if it is not a service). | |
1762 // To make this behavior uniform and the mechanism simpler, we | |
1763 // completely disable the VM's usage of these console events if -Xrs | |
1764 // (=ReduceSignalUsage) is specified. This means, for example, that | |
1765 // the CTRL-BREAK thread dump mechanism is also disabled in this | |
1766 // case. See bugs 4323062, 4345157, and related bugs. | |
1767 | |
1768 if (!ReduceSignalUsage) { | |
1769 // Add a CTRL-C handler | |
1770 SetConsoleCtrlHandler(consoleHandler, TRUE); | |
1771 } | |
1772 } | |
1773 | |
1774 void os::signal_notify(int signal_number) { | |
1775 BOOL ret; | |
1776 | |
1777 Atomic::inc(&pending_signals[signal_number]); | |
1778 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); | |
1779 assert(ret != 0, "ReleaseSemaphore() failed"); | |
1780 } | |
1781 | |
1782 static int check_pending_signals(bool wait_for_signal) { | |
1783 DWORD ret; | |
1784 while (true) { | |
1785 for (int i = 0; i < NSIG + 1; i++) { | |
1786 jint n = pending_signals[i]; | |
1787 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
1788 return i; | |
1789 } | |
1790 } | |
1791 if (!wait_for_signal) { | |
1792 return -1; | |
1793 } | |
1794 | |
1795 JavaThread *thread = JavaThread::current(); | |
1796 | |
1797 ThreadBlockInVM tbivm(thread); | |
1798 | |
1799 bool threadIsSuspended; | |
1800 do { | |
1801 thread->set_suspend_equivalent(); | |
1802 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
1803 ret = ::WaitForSingleObject(sig_sem, INFINITE); | |
1804 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); | |
1805 | |
1806 // were we externally suspended while we were waiting? | |
1807 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
1808 if (threadIsSuspended) { | |
1809 // | |
1810 // The semaphore has been incremented, but while we were waiting | |
1811 // another thread suspended us. We don't want to continue running | |
1812 // while suspended because that would surprise the thread that | |
1813 // suspended us. | |
1814 // | |
1815 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); | |
1816 assert(ret != 0, "ReleaseSemaphore() failed"); | |
1817 | |
1818 thread->java_suspend_self(); | |
1819 } | |
1820 } while (threadIsSuspended); | |
1821 } | |
1822 } | |
1823 | |
1824 int os::signal_lookup() { | |
1825 return check_pending_signals(false); | |
1826 } | |
1827 | |
1828 int os::signal_wait() { | |
1829 return check_pending_signals(true); | |
1830 } | |
1831 | |
1832 // Implicit OS exception handling | |
1833 | |
1834 LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { | |
1835 JavaThread* thread = JavaThread::current(); | |
1836 // Save pc in thread | |
1837 #ifdef _M_IA64 | |
1838 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); | |
1839 // Set pc to handler | |
1840 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; | |
1841 #elif _M_AMD64 | |
1842 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); | |
1843 // Set pc to handler | |
1844 exceptionInfo->ContextRecord->Rip = (DWORD64)handler; | |
1845 #else | |
1846 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); | |
1847 // Set pc to handler | |
1848 exceptionInfo->ContextRecord->Eip = (LONG)handler; | |
1849 #endif | |
1850 | |
1851 // Continue the execution | |
1852 return EXCEPTION_CONTINUE_EXECUTION; | |
1853 } | |
1854 | |
1855 | |
1856 // Used for PostMortemDump | |
1857 extern "C" void safepoints(); | |
1858 extern "C" void find(int x); | |
1859 extern "C" void events(); | |
1860 | |
1861 // According to Windows API documentation, an illegal instruction sequence should generate | |
1862 // the 0xC000001C exception code. However, real world experience shows that occasionnaly | |
1863 // the execution of an illegal instruction can generate the exception code 0xC000001E. This | |
1864 // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). | |
1865 | |
1866 #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E | |
1867 | |
1868 // From "Execution Protection in the Windows Operating System" draft 0.35 | |
1869 // Once a system header becomes available, the "real" define should be | |
1870 // included or copied here. | |
1871 #define EXCEPTION_INFO_EXEC_VIOLATION 0x08 | |
1872 | |
1873 #define def_excpt(val) #val, val | |
1874 | |
1875 struct siglabel { | |
1876 char *name; | |
1877 int number; | |
1878 }; | |
1879 | |
1880 struct siglabel exceptlabels[] = { | |
1881 def_excpt(EXCEPTION_ACCESS_VIOLATION), | |
1882 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), | |
1883 def_excpt(EXCEPTION_BREAKPOINT), | |
1884 def_excpt(EXCEPTION_SINGLE_STEP), | |
1885 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), | |
1886 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), | |
1887 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), | |
1888 def_excpt(EXCEPTION_FLT_INEXACT_RESULT), | |
1889 def_excpt(EXCEPTION_FLT_INVALID_OPERATION), | |
1890 def_excpt(EXCEPTION_FLT_OVERFLOW), | |
1891 def_excpt(EXCEPTION_FLT_STACK_CHECK), | |
1892 def_excpt(EXCEPTION_FLT_UNDERFLOW), | |
1893 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), | |
1894 def_excpt(EXCEPTION_INT_OVERFLOW), | |
1895 def_excpt(EXCEPTION_PRIV_INSTRUCTION), | |
1896 def_excpt(EXCEPTION_IN_PAGE_ERROR), | |
1897 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), | |
1898 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), | |
1899 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), | |
1900 def_excpt(EXCEPTION_STACK_OVERFLOW), | |
1901 def_excpt(EXCEPTION_INVALID_DISPOSITION), | |
1902 def_excpt(EXCEPTION_GUARD_PAGE), | |
1903 def_excpt(EXCEPTION_INVALID_HANDLE), | |
1904 NULL, 0 | |
1905 }; | |
1906 | |
1907 const char* os::exception_name(int exception_code, char *buf, size_t size) { | |
1908 for (int i = 0; exceptlabels[i].name != NULL; i++) { | |
1909 if (exceptlabels[i].number == exception_code) { | |
1910 jio_snprintf(buf, size, "%s", exceptlabels[i].name); | |
1911 return buf; | |
1912 } | |
1913 } | |
1914 | |
1915 return NULL; | |
1916 } | |
1917 | |
1918 //----------------------------------------------------------------------------- | |
1919 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
1920 // handle exception caused by idiv; should only happen for -MinInt/-1 | |
1921 // (division by zero is handled explicitly) | |
1922 #ifdef _M_IA64 | |
1923 assert(0, "Fix Handle_IDiv_Exception"); | |
1924 #elif _M_AMD64 | |
1925 PCONTEXT ctx = exceptionInfo->ContextRecord; | |
1926 address pc = (address)ctx->Rip; | |
1927 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); | |
1928 assert(pc[0] == 0xF7, "not an idiv opcode"); | |
1929 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); | |
1930 assert(ctx->Rax == min_jint, "unexpected idiv exception"); | |
1931 // set correct result values and continue after idiv instruction | |
1932 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes | |
1933 ctx->Rax = (DWORD)min_jint; // result | |
1934 ctx->Rdx = (DWORD)0; // remainder | |
1935 // Continue the execution | |
1936 #else | |
1937 PCONTEXT ctx = exceptionInfo->ContextRecord; | |
1938 address pc = (address)ctx->Eip; | |
1939 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); | |
1940 assert(pc[0] == 0xF7, "not an idiv opcode"); | |
1941 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); | |
1942 assert(ctx->Eax == min_jint, "unexpected idiv exception"); | |
1943 // set correct result values and continue after idiv instruction | |
1944 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes | |
1945 ctx->Eax = (DWORD)min_jint; // result | |
1946 ctx->Edx = (DWORD)0; // remainder | |
1947 // Continue the execution | |
1948 #endif | |
1949 return EXCEPTION_CONTINUE_EXECUTION; | |
1950 } | |
1951 | |
1952 #ifndef _WIN64 | |
1953 //----------------------------------------------------------------------------- | |
1954 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
1955 // handle exception caused by native mothod modifying control word | |
1956 PCONTEXT ctx = exceptionInfo->ContextRecord; | |
1957 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; | |
1958 | |
1959 switch (exception_code) { | |
1960 case EXCEPTION_FLT_DENORMAL_OPERAND: | |
1961 case EXCEPTION_FLT_DIVIDE_BY_ZERO: | |
1962 case EXCEPTION_FLT_INEXACT_RESULT: | |
1963 case EXCEPTION_FLT_INVALID_OPERATION: | |
1964 case EXCEPTION_FLT_OVERFLOW: | |
1965 case EXCEPTION_FLT_STACK_CHECK: | |
1966 case EXCEPTION_FLT_UNDERFLOW: | |
1967 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); | |
1968 if (fp_control_word != ctx->FloatSave.ControlWord) { | |
1969 // Restore FPCW and mask out FLT exceptions | |
1970 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; | |
1971 // Mask out pending FLT exceptions | |
1972 ctx->FloatSave.StatusWord &= 0xffffff00; | |
1973 return EXCEPTION_CONTINUE_EXECUTION; | |
1974 } | |
1975 } | |
1976 return EXCEPTION_CONTINUE_SEARCH; | |
1977 } | |
1978 #else //_WIN64 | |
1979 /* | |
1980 On Windows, the mxcsr control bits are non-volatile across calls | |
1981 See also CR 6192333 | |
1982 If EXCEPTION_FLT_* happened after some native method modified | |
1983 mxcsr - it is not a jvm fault. | |
1984 However should we decide to restore of mxcsr after a faulty | |
1985 native method we can uncomment following code | |
1986 jint MxCsr = INITIAL_MXCSR; | |
1987 // we can't use StubRoutines::addr_mxcsr_std() | |
1988 // because in Win64 mxcsr is not saved there | |
1989 if (MxCsr != ctx->MxCsr) { | |
1990 ctx->MxCsr = MxCsr; | |
1991 return EXCEPTION_CONTINUE_EXECUTION; | |
1992 } | |
1993 | |
1994 */ | |
1995 #endif //_WIN64 | |
1996 | |
1997 | |
1998 // Fatal error reporting is single threaded so we can make this a | |
1999 // static and preallocated. If it's more than MAX_PATH silently ignore | |
2000 // it. | |
2001 static char saved_error_file[MAX_PATH] = {0}; | |
2002 | |
2003 void os::set_error_file(const char *logfile) { | |
2004 if (strlen(logfile) <= MAX_PATH) { | |
2005 strncpy(saved_error_file, logfile, MAX_PATH); | |
2006 } | |
2007 } | |
2008 | |
2009 static inline void report_error(Thread* t, DWORD exception_code, | |
2010 address addr, void* siginfo, void* context) { | |
2011 VMError err(t, exception_code, addr, siginfo, context); | |
2012 err.report_and_die(); | |
2013 | |
2014 // If UseOsErrorReporting, this will return here and save the error file | |
2015 // somewhere where we can find it in the minidump. | |
2016 } | |
2017 | |
2018 //----------------------------------------------------------------------------- | |
2019 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
2020 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; | |
2021 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; | |
2022 #ifdef _M_IA64 | |
2023 address pc = (address) exceptionInfo->ContextRecord->StIIP; | |
2024 #elif _M_AMD64 | |
2025 address pc = (address) exceptionInfo->ContextRecord->Rip; | |
2026 #else | |
2027 address pc = (address) exceptionInfo->ContextRecord->Eip; | |
2028 #endif | |
2029 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady | |
2030 | |
2031 #ifndef _WIN64 | |
2032 // Execution protection violation - win32 running on AMD64 only | |
2033 // Handled first to avoid misdiagnosis as a "normal" access violation; | |
2034 // This is safe to do because we have a new/unique ExceptionInformation | |
2035 // code for this condition. | |
2036 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
2037 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
2038 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; | |
2039 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
2040 | |
2041 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { | |
2042 int page_size = os::vm_page_size(); | |
2043 | |
2044 // Make sure the pc and the faulting address are sane. | |
2045 // | |
2046 // If an instruction spans a page boundary, and the page containing | |
2047 // the beginning of the instruction is executable but the following | |
2048 // page is not, the pc and the faulting address might be slightly | |
2049 // different - we still want to unguard the 2nd page in this case. | |
2050 // | |
2051 // 15 bytes seems to be a (very) safe value for max instruction size. | |
2052 bool pc_is_near_addr = | |
2053 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); | |
2054 bool instr_spans_page_boundary = | |
2055 (align_size_down((intptr_t) pc ^ (intptr_t) addr, | |
2056 (intptr_t) page_size) > 0); | |
2057 | |
2058 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { | |
2059 static volatile address last_addr = | |
2060 (address) os::non_memory_address_word(); | |
2061 | |
2062 // In conservative mode, don't unguard unless the address is in the VM | |
2063 if (UnguardOnExecutionViolation > 0 && addr != last_addr && | |
2064 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { | |
2065 | |
477
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2066 // Set memory to RWX and retry |
0 | 2067 address page_start = |
2068 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); | |
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2069 bool res = os::protect_memory((char*) page_start, page_size, |
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2070 os::MEM_PROT_RWX); |
0 | 2071 |
2072 if (PrintMiscellaneous && Verbose) { | |
2073 char buf[256]; | |
2074 jio_snprintf(buf, sizeof(buf), "Execution protection violation " | |
2075 "at " INTPTR_FORMAT | |
2076 ", unguarding " INTPTR_FORMAT ": %s", addr, | |
2077 page_start, (res ? "success" : strerror(errno))); | |
2078 tty->print_raw_cr(buf); | |
2079 } | |
2080 | |
2081 // Set last_addr so if we fault again at the same address, we don't | |
2082 // end up in an endless loop. | |
2083 // | |
2084 // There are two potential complications here. Two threads trapping | |
2085 // at the same address at the same time could cause one of the | |
2086 // threads to think it already unguarded, and abort the VM. Likely | |
2087 // very rare. | |
2088 // | |
2089 // The other race involves two threads alternately trapping at | |
2090 // different addresses and failing to unguard the page, resulting in | |
2091 // an endless loop. This condition is probably even more unlikely | |
2092 // than the first. | |
2093 // | |
2094 // Although both cases could be avoided by using locks or thread | |
2095 // local last_addr, these solutions are unnecessary complication: | |
2096 // this handler is a best-effort safety net, not a complete solution. | |
2097 // It is disabled by default and should only be used as a workaround | |
2098 // in case we missed any no-execute-unsafe VM code. | |
2099 | |
2100 last_addr = addr; | |
2101 | |
2102 return EXCEPTION_CONTINUE_EXECUTION; | |
2103 } | |
2104 } | |
2105 | |
2106 // Last unguard failed or not unguarding | |
2107 tty->print_raw_cr("Execution protection violation"); | |
2108 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, | |
2109 exceptionInfo->ContextRecord); | |
2110 return EXCEPTION_CONTINUE_SEARCH; | |
2111 } | |
2112 } | |
2113 #endif // _WIN64 | |
2114 | |
2115 // Check to see if we caught the safepoint code in the | |
2116 // process of write protecting the memory serialization page. | |
2117 // It write enables the page immediately after protecting it | |
2118 // so just return. | |
2119 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { | |
2120 JavaThread* thread = (JavaThread*) t; | |
2121 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
2122 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
2123 if ( os::is_memory_serialize_page(thread, addr) ) { | |
2124 // Block current thread until the memory serialize page permission restored. | |
2125 os::block_on_serialize_page_trap(); | |
2126 return EXCEPTION_CONTINUE_EXECUTION; | |
2127 } | |
2128 } | |
2129 | |
2130 | |
2131 if (t != NULL && t->is_Java_thread()) { | |
2132 JavaThread* thread = (JavaThread*) t; | |
2133 bool in_java = thread->thread_state() == _thread_in_Java; | |
2134 | |
2135 // Handle potential stack overflows up front. | |
2136 if (exception_code == EXCEPTION_STACK_OVERFLOW) { | |
2137 if (os::uses_stack_guard_pages()) { | |
2138 #ifdef _M_IA64 | |
2139 // | |
2140 // If it's a legal stack address continue, Windows will map it in. | |
2141 // | |
2142 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
2143 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
2144 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) | |
2145 return EXCEPTION_CONTINUE_EXECUTION; | |
2146 | |
2147 // The register save area is the same size as the memory stack | |
2148 // and starts at the page just above the start of the memory stack. | |
2149 // If we get a fault in this area, we've run out of register | |
2150 // stack. If we are in java, try throwing a stack overflow exception. | |
2151 if (addr > thread->stack_base() && | |
2152 addr <= (thread->stack_base()+thread->stack_size()) ) { | |
2153 char buf[256]; | |
2154 jio_snprintf(buf, sizeof(buf), | |
2155 "Register stack overflow, addr:%p, stack_base:%p\n", | |
2156 addr, thread->stack_base() ); | |
2157 tty->print_raw_cr(buf); | |
2158 // If not in java code, return and hope for the best. | |
2159 return in_java ? Handle_Exception(exceptionInfo, | |
2160 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) | |
2161 : EXCEPTION_CONTINUE_EXECUTION; | |
2162 } | |
2163 #endif | |
2164 if (thread->stack_yellow_zone_enabled()) { | |
2165 // Yellow zone violation. The o/s has unprotected the first yellow | |
2166 // zone page for us. Note: must call disable_stack_yellow_zone to | |
2167 // update the enabled status, even if the zone contains only one page. | |
2168 thread->disable_stack_yellow_zone(); | |
2169 // If not in java code, return and hope for the best. | |
2170 return in_java ? Handle_Exception(exceptionInfo, | |
2171 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) | |
2172 : EXCEPTION_CONTINUE_EXECUTION; | |
2173 } else { | |
2174 // Fatal red zone violation. | |
2175 thread->disable_stack_red_zone(); | |
2176 tty->print_raw_cr("An unrecoverable stack overflow has occurred."); | |
2177 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
2178 exceptionInfo->ContextRecord); | |
2179 return EXCEPTION_CONTINUE_SEARCH; | |
2180 } | |
2181 } else if (in_java) { | |
2182 // JVM-managed guard pages cannot be used on win95/98. The o/s provides | |
2183 // a one-time-only guard page, which it has released to us. The next | |
2184 // stack overflow on this thread will result in an ACCESS_VIOLATION. | |
2185 return Handle_Exception(exceptionInfo, | |
2186 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); | |
2187 } else { | |
2188 // Can only return and hope for the best. Further stack growth will | |
2189 // result in an ACCESS_VIOLATION. | |
2190 return EXCEPTION_CONTINUE_EXECUTION; | |
2191 } | |
2192 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
2193 // Either stack overflow or null pointer exception. | |
2194 if (in_java) { | |
2195 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
2196 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
2197 address stack_end = thread->stack_base() - thread->stack_size(); | |
2198 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { | |
2199 // Stack overflow. | |
2200 assert(!os::uses_stack_guard_pages(), | |
2201 "should be caught by red zone code above."); | |
2202 return Handle_Exception(exceptionInfo, | |
2203 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); | |
2204 } | |
2205 // | |
2206 // Check for safepoint polling and implicit null | |
2207 // We only expect null pointers in the stubs (vtable) | |
2208 // the rest are checked explicitly now. | |
2209 // | |
2210 CodeBlob* cb = CodeCache::find_blob(pc); | |
2211 if (cb != NULL) { | |
2212 if (os::is_poll_address(addr)) { | |
2213 address stub = SharedRuntime::get_poll_stub(pc); | |
2214 return Handle_Exception(exceptionInfo, stub); | |
2215 } | |
2216 } | |
2217 { | |
2218 #ifdef _WIN64 | |
2219 // | |
2220 // If it's a legal stack address map the entire region in | |
2221 // | |
2222 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; | |
2223 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
2224 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { | |
2225 addr = (address)((uintptr_t)addr & | |
2226 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); | |
656 | 2227 os::commit_memory((char *)addr, thread->stack_base() - addr, |
2228 false ); | |
0 | 2229 return EXCEPTION_CONTINUE_EXECUTION; |
2230 } | |
2231 else | |
2232 #endif | |
2233 { | |
2234 // Null pointer exception. | |
2235 #ifdef _M_IA64 | |
2236 // We catch register stack overflows in compiled code by doing | |
2237 // an explicit compare and executing a st8(G0, G0) if the | |
2238 // BSP enters into our guard area. We test for the overflow | |
2239 // condition and fall into the normal null pointer exception | |
2240 // code if BSP hasn't overflowed. | |
2241 if ( in_java ) { | |
2242 if(thread->register_stack_overflow()) { | |
2243 assert((address)exceptionInfo->ContextRecord->IntS3 == | |
2244 thread->register_stack_limit(), | |
2245 "GR7 doesn't contain register_stack_limit"); | |
2246 // Disable the yellow zone which sets the state that | |
2247 // we've got a stack overflow problem. | |
2248 if (thread->stack_yellow_zone_enabled()) { | |
2249 thread->disable_stack_yellow_zone(); | |
2250 } | |
2251 // Give us some room to process the exception | |
2252 thread->disable_register_stack_guard(); | |
2253 // Update GR7 with the new limit so we can continue running | |
2254 // compiled code. | |
2255 exceptionInfo->ContextRecord->IntS3 = | |
2256 (ULONGLONG)thread->register_stack_limit(); | |
2257 return Handle_Exception(exceptionInfo, | |
2258 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); | |
2259 } else { | |
2260 // | |
2261 // Check for implicit null | |
2262 // We only expect null pointers in the stubs (vtable) | |
2263 // the rest are checked explicitly now. | |
2264 // | |
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2265 if (((uintptr_t)addr) < os::vm_page_size() ) { |
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2266 // an access to the first page of VM--assume it is a null pointer |
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2267 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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2268 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); |
0 | 2269 } |
2270 } | |
2271 } // in_java | |
2272 | |
2273 // IA64 doesn't use implicit null checking yet. So we shouldn't | |
2274 // get here. | |
2275 tty->print_raw_cr("Access violation, possible null pointer exception"); | |
2276 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
2277 exceptionInfo->ContextRecord); | |
2278 return EXCEPTION_CONTINUE_SEARCH; | |
2279 #else /* !IA64 */ | |
2280 | |
2281 // Windows 98 reports faulting addresses incorrectly | |
2282 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || | |
2283 !os::win32::is_nt()) { | |
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2284 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
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2285 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); |
0 | 2286 } |
2287 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
2288 exceptionInfo->ContextRecord); | |
2289 return EXCEPTION_CONTINUE_SEARCH; | |
2290 #endif | |
2291 } | |
2292 } | |
2293 } | |
2294 | |
2295 #ifdef _WIN64 | |
2296 // Special care for fast JNI field accessors. | |
2297 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks | |
2298 // in and the heap gets shrunk before the field access. | |
2299 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
2300 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
2301 if (addr != (address)-1) { | |
2302 return Handle_Exception(exceptionInfo, addr); | |
2303 } | |
2304 } | |
2305 #endif | |
2306 | |
2307 #ifdef _WIN64 | |
2308 // Windows will sometimes generate an access violation | |
2309 // when we call malloc. Since we use VectoredExceptions | |
2310 // on 64 bit platforms, we see this exception. We must | |
2311 // pass this exception on so Windows can recover. | |
2312 // We check to see if the pc of the fault is in NTDLL.DLL | |
2313 // if so, we pass control on to Windows for handling. | |
2314 if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH; | |
2315 #endif | |
2316 | |
2317 // Stack overflow or null pointer exception in native code. | |
2318 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
2319 exceptionInfo->ContextRecord); | |
2320 return EXCEPTION_CONTINUE_SEARCH; | |
2321 } | |
2322 | |
2323 if (in_java) { | |
2324 switch (exception_code) { | |
2325 case EXCEPTION_INT_DIVIDE_BY_ZERO: | |
2326 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); | |
2327 | |
2328 case EXCEPTION_INT_OVERFLOW: | |
2329 return Handle_IDiv_Exception(exceptionInfo); | |
2330 | |
2331 } // switch | |
2332 } | |
2333 #ifndef _WIN64 | |
2334 if ((thread->thread_state() == _thread_in_Java) || | |
2335 (thread->thread_state() == _thread_in_native) ) | |
2336 { | |
2337 LONG result=Handle_FLT_Exception(exceptionInfo); | |
2338 if (result==EXCEPTION_CONTINUE_EXECUTION) return result; | |
2339 } | |
2340 #endif //_WIN64 | |
2341 } | |
2342 | |
2343 if (exception_code != EXCEPTION_BREAKPOINT) { | |
2344 #ifndef _WIN64 | |
2345 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
2346 exceptionInfo->ContextRecord); | |
2347 #else | |
2348 // Itanium Windows uses a VectoredExceptionHandler | |
2349 // Which means that C++ programatic exception handlers (try/except) | |
2350 // will get here. Continue the search for the right except block if | |
2351 // the exception code is not a fatal code. | |
2352 switch ( exception_code ) { | |
2353 case EXCEPTION_ACCESS_VIOLATION: | |
2354 case EXCEPTION_STACK_OVERFLOW: | |
2355 case EXCEPTION_ILLEGAL_INSTRUCTION: | |
2356 case EXCEPTION_ILLEGAL_INSTRUCTION_2: | |
2357 case EXCEPTION_INT_OVERFLOW: | |
2358 case EXCEPTION_INT_DIVIDE_BY_ZERO: | |
2359 { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, | |
2360 exceptionInfo->ContextRecord); | |
2361 } | |
2362 break; | |
2363 default: | |
2364 break; | |
2365 } | |
2366 #endif | |
2367 } | |
2368 return EXCEPTION_CONTINUE_SEARCH; | |
2369 } | |
2370 | |
2371 #ifndef _WIN64 | |
2372 // Special care for fast JNI accessors. | |
2373 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and | |
2374 // the heap gets shrunk before the field access. | |
2375 // Need to install our own structured exception handler since native code may | |
2376 // install its own. | |
2377 LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { | |
2378 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; | |
2379 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { | |
2380 address pc = (address) exceptionInfo->ContextRecord->Eip; | |
2381 address addr = JNI_FastGetField::find_slowcase_pc(pc); | |
2382 if (addr != (address)-1) { | |
2383 return Handle_Exception(exceptionInfo, addr); | |
2384 } | |
2385 } | |
2386 return EXCEPTION_CONTINUE_SEARCH; | |
2387 } | |
2388 | |
2389 #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ | |
2390 Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ | |
2391 __try { \ | |
2392 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ | |
2393 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ | |
2394 } \ | |
2395 return 0; \ | |
2396 } | |
2397 | |
2398 DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) | |
2399 DEFINE_FAST_GETFIELD(jbyte, byte, Byte) | |
2400 DEFINE_FAST_GETFIELD(jchar, char, Char) | |
2401 DEFINE_FAST_GETFIELD(jshort, short, Short) | |
2402 DEFINE_FAST_GETFIELD(jint, int, Int) | |
2403 DEFINE_FAST_GETFIELD(jlong, long, Long) | |
2404 DEFINE_FAST_GETFIELD(jfloat, float, Float) | |
2405 DEFINE_FAST_GETFIELD(jdouble, double, Double) | |
2406 | |
2407 address os::win32::fast_jni_accessor_wrapper(BasicType type) { | |
2408 switch (type) { | |
2409 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; | |
2410 case T_BYTE: return (address)jni_fast_GetByteField_wrapper; | |
2411 case T_CHAR: return (address)jni_fast_GetCharField_wrapper; | |
2412 case T_SHORT: return (address)jni_fast_GetShortField_wrapper; | |
2413 case T_INT: return (address)jni_fast_GetIntField_wrapper; | |
2414 case T_LONG: return (address)jni_fast_GetLongField_wrapper; | |
2415 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; | |
2416 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; | |
2417 default: ShouldNotReachHere(); | |
2418 } | |
2419 return (address)-1; | |
2420 } | |
2421 #endif | |
2422 | |
2423 // Virtual Memory | |
2424 | |
2425 int os::vm_page_size() { return os::win32::vm_page_size(); } | |
2426 int os::vm_allocation_granularity() { | |
2427 return os::win32::vm_allocation_granularity(); | |
2428 } | |
2429 | |
2430 // Windows large page support is available on Windows 2003. In order to use | |
2431 // large page memory, the administrator must first assign additional privilege | |
2432 // to the user: | |
2433 // + select Control Panel -> Administrative Tools -> Local Security Policy | |
2434 // + select Local Policies -> User Rights Assignment | |
2435 // + double click "Lock pages in memory", add users and/or groups | |
2436 // + reboot | |
2437 // Note the above steps are needed for administrator as well, as administrators | |
2438 // by default do not have the privilege to lock pages in memory. | |
2439 // | |
2440 // Note about Windows 2003: although the API supports committing large page | |
2441 // memory on a page-by-page basis and VirtualAlloc() returns success under this | |
2442 // scenario, I found through experiment it only uses large page if the entire | |
2443 // memory region is reserved and committed in a single VirtualAlloc() call. | |
2444 // This makes Windows large page support more or less like Solaris ISM, in | |
2445 // that the entire heap must be committed upfront. This probably will change | |
2446 // in the future, if so the code below needs to be revisited. | |
2447 | |
2448 #ifndef MEM_LARGE_PAGES | |
2449 #define MEM_LARGE_PAGES 0x20000000 | |
2450 #endif | |
2451 | |
2452 // GetLargePageMinimum is only available on Windows 2003. The other functions | |
2453 // are available on NT but not on Windows 98/Me. We have to resolve them at | |
2454 // runtime. | |
2455 typedef SIZE_T (WINAPI *GetLargePageMinimum_func_type) (void); | |
2456 typedef BOOL (WINAPI *AdjustTokenPrivileges_func_type) | |
2457 (HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); | |
2458 typedef BOOL (WINAPI *OpenProcessToken_func_type) (HANDLE, DWORD, PHANDLE); | |
2459 typedef BOOL (WINAPI *LookupPrivilegeValue_func_type) (LPCTSTR, LPCTSTR, PLUID); | |
2460 | |
2461 static GetLargePageMinimum_func_type _GetLargePageMinimum; | |
2462 static AdjustTokenPrivileges_func_type _AdjustTokenPrivileges; | |
2463 static OpenProcessToken_func_type _OpenProcessToken; | |
2464 static LookupPrivilegeValue_func_type _LookupPrivilegeValue; | |
2465 | |
2466 static HINSTANCE _kernel32; | |
2467 static HINSTANCE _advapi32; | |
2468 static HANDLE _hProcess; | |
2469 static HANDLE _hToken; | |
2470 | |
2471 static size_t _large_page_size = 0; | |
2472 | |
2473 static bool resolve_functions_for_large_page_init() { | |
2474 _kernel32 = LoadLibrary("kernel32.dll"); | |
2475 if (_kernel32 == NULL) return false; | |
2476 | |
2477 _GetLargePageMinimum = CAST_TO_FN_PTR(GetLargePageMinimum_func_type, | |
2478 GetProcAddress(_kernel32, "GetLargePageMinimum")); | |
2479 if (_GetLargePageMinimum == NULL) return false; | |
2480 | |
2481 _advapi32 = LoadLibrary("advapi32.dll"); | |
2482 if (_advapi32 == NULL) return false; | |
2483 | |
2484 _AdjustTokenPrivileges = CAST_TO_FN_PTR(AdjustTokenPrivileges_func_type, | |
2485 GetProcAddress(_advapi32, "AdjustTokenPrivileges")); | |
2486 _OpenProcessToken = CAST_TO_FN_PTR(OpenProcessToken_func_type, | |
2487 GetProcAddress(_advapi32, "OpenProcessToken")); | |
2488 _LookupPrivilegeValue = CAST_TO_FN_PTR(LookupPrivilegeValue_func_type, | |
2489 GetProcAddress(_advapi32, "LookupPrivilegeValueA")); | |
2490 return _AdjustTokenPrivileges != NULL && | |
2491 _OpenProcessToken != NULL && | |
2492 _LookupPrivilegeValue != NULL; | |
2493 } | |
2494 | |
2495 static bool request_lock_memory_privilege() { | |
2496 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, | |
2497 os::current_process_id()); | |
2498 | |
2499 LUID luid; | |
2500 if (_hProcess != NULL && | |
2501 _OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && | |
2502 _LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { | |
2503 | |
2504 TOKEN_PRIVILEGES tp; | |
2505 tp.PrivilegeCount = 1; | |
2506 tp.Privileges[0].Luid = luid; | |
2507 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; | |
2508 | |
2509 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the | |
2510 // privilege. Check GetLastError() too. See MSDN document. | |
2511 if (_AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && | |
2512 (GetLastError() == ERROR_SUCCESS)) { | |
2513 return true; | |
2514 } | |
2515 } | |
2516 | |
2517 return false; | |
2518 } | |
2519 | |
2520 static void cleanup_after_large_page_init() { | |
2521 _GetLargePageMinimum = NULL; | |
2522 _AdjustTokenPrivileges = NULL; | |
2523 _OpenProcessToken = NULL; | |
2524 _LookupPrivilegeValue = NULL; | |
2525 if (_kernel32) FreeLibrary(_kernel32); | |
2526 _kernel32 = NULL; | |
2527 if (_advapi32) FreeLibrary(_advapi32); | |
2528 _advapi32 = NULL; | |
2529 if (_hProcess) CloseHandle(_hProcess); | |
2530 _hProcess = NULL; | |
2531 if (_hToken) CloseHandle(_hToken); | |
2532 _hToken = NULL; | |
2533 } | |
2534 | |
2535 bool os::large_page_init() { | |
2536 if (!UseLargePages) return false; | |
2537 | |
2538 // print a warning if any large page related flag is specified on command line | |
2539 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || | |
2540 !FLAG_IS_DEFAULT(LargePageSizeInBytes); | |
2541 bool success = false; | |
2542 | |
2543 # define WARN(msg) if (warn_on_failure) { warning(msg); } | |
2544 if (resolve_functions_for_large_page_init()) { | |
2545 if (request_lock_memory_privilege()) { | |
2546 size_t s = _GetLargePageMinimum(); | |
2547 if (s) { | |
2548 #if defined(IA32) || defined(AMD64) | |
2549 if (s > 4*M || LargePageSizeInBytes > 4*M) { | |
2550 WARN("JVM cannot use large pages bigger than 4mb."); | |
2551 } else { | |
2552 #endif | |
2553 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { | |
2554 _large_page_size = LargePageSizeInBytes; | |
2555 } else { | |
2556 _large_page_size = s; | |
2557 } | |
2558 success = true; | |
2559 #if defined(IA32) || defined(AMD64) | |
2560 } | |
2561 #endif | |
2562 } else { | |
2563 WARN("Large page is not supported by the processor."); | |
2564 } | |
2565 } else { | |
2566 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); | |
2567 } | |
2568 } else { | |
2569 WARN("Large page is not supported by the operating system."); | |
2570 } | |
2571 #undef WARN | |
2572 | |
2573 const size_t default_page_size = (size_t) vm_page_size(); | |
2574 if (success && _large_page_size > default_page_size) { | |
2575 _page_sizes[0] = _large_page_size; | |
2576 _page_sizes[1] = default_page_size; | |
2577 _page_sizes[2] = 0; | |
2578 } | |
2579 | |
2580 cleanup_after_large_page_init(); | |
2581 return success; | |
2582 } | |
2583 | |
2584 // On win32, one cannot release just a part of reserved memory, it's an | |
2585 // all or nothing deal. When we split a reservation, we must break the | |
2586 // reservation into two reservations. | |
2587 void os::split_reserved_memory(char *base, size_t size, size_t split, | |
2588 bool realloc) { | |
2589 if (size > 0) { | |
2590 release_memory(base, size); | |
2591 if (realloc) { | |
2592 reserve_memory(split, base); | |
2593 } | |
2594 if (size != split) { | |
2595 reserve_memory(size - split, base + split); | |
2596 } | |
2597 } | |
2598 } | |
2599 | |
2600 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { | |
2601 assert((size_t)addr % os::vm_allocation_granularity() == 0, | |
2602 "reserve alignment"); | |
2603 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); | |
656 | 2604 char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); |
0 | 2605 assert(res == NULL || addr == NULL || addr == res, |
2606 "Unexpected address from reserve."); | |
2607 return res; | |
2608 } | |
2609 | |
2610 // Reserve memory at an arbitrary address, only if that area is | |
2611 // available (and not reserved for something else). | |
2612 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { | |
2613 // Windows os::reserve_memory() fails of the requested address range is | |
2614 // not avilable. | |
2615 return reserve_memory(bytes, requested_addr); | |
2616 } | |
2617 | |
2618 size_t os::large_page_size() { | |
2619 return _large_page_size; | |
2620 } | |
2621 | |
2622 bool os::can_commit_large_page_memory() { | |
2623 // Windows only uses large page memory when the entire region is reserved | |
2624 // and committed in a single VirtualAlloc() call. This may change in the | |
2625 // future, but with Windows 2003 it's not possible to commit on demand. | |
2626 return false; | |
2627 } | |
2628 | |
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2629 bool os::can_execute_large_page_memory() { |
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2630 return true; |
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2631 } |
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2632 |
656 | 2633 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { |
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2634 |
717 | 2635 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
2636 | |
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2637 if (UseLargePagesIndividualAllocation) { |
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2638 if (TracePageSizes && Verbose) { |
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2639 tty->print_cr("Reserving large pages individually."); |
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2640 } |
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2641 char * p_buf; |
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2642 // first reserve enough address space in advance since we want to be |
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2643 // able to break a single contiguous virtual address range into multiple |
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2644 // large page commits but WS2003 does not allow reserving large page space |
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2645 // so we just use 4K pages for reserve, this gives us a legal contiguous |
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2646 // address space. then we will deallocate that reservation, and re alloc |
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2647 // using large pages |
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2648 const size_t size_of_reserve = bytes + _large_page_size; |
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2649 if (bytes > size_of_reserve) { |
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2650 // Overflowed. |
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2651 warning("Individually allocated large pages failed, " |
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2652 "use -XX:-UseLargePagesIndividualAllocation to turn off"); |
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2653 return NULL; |
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2654 } |
642
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2655 p_buf = (char *) VirtualAlloc(addr, |
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2656 size_of_reserve, // size of Reserve |
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2657 MEM_RESERVE, |
656 | 2658 PAGE_READWRITE); |
389
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2659 // If reservation failed, return NULL |
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2660 if (p_buf == NULL) return NULL; |
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2661 |
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2662 release_memory(p_buf, bytes + _large_page_size); |
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2663 // round up to page boundary. If the size_of_reserve did not |
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2664 // overflow and the reservation did not fail, this align up |
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2665 // should not overflow. |
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2666 p_buf = (char *) align_size_up((size_t)p_buf, _large_page_size); |
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2667 |
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2668 // now go through and allocate one page at a time until all bytes are |
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2669 // allocated |
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2670 size_t bytes_remaining = align_size_up(bytes, _large_page_size); |
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2671 // An overflow of align_size_up() would have been caught above |
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2672 // in the calculation of size_of_reserve. |
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2673 char * next_alloc_addr = p_buf; |
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2674 |
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2675 #ifdef ASSERT |
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2676 // Variable for the failure injection |
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2677 long ran_num = os::random(); |
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2678 size_t fail_after = ran_num % bytes; |
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2679 #endif |
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2680 |
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2681 while (bytes_remaining) { |
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2682 size_t bytes_to_rq = MIN2(bytes_remaining, _large_page_size); |
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2683 // Note allocate and commit |
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2684 char * p_new; |
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2685 |
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2686 #ifdef ASSERT |
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2687 bool inject_error = LargePagesIndividualAllocationInjectError && |
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2688 (bytes_remaining <= fail_after); |
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2689 #else |
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2690 const bool inject_error = false; |
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2691 #endif |
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2692 |
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2693 if (inject_error) { |
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2694 p_new = NULL; |
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2695 } else { |
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2696 p_new = (char *) VirtualAlloc(next_alloc_addr, |
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2697 bytes_to_rq, |
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2698 MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES, |
717 | 2699 prot); |
389
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2700 } |
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2701 |
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2702 if (p_new == NULL) { |
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2703 // Free any allocated pages |
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2704 if (next_alloc_addr > p_buf) { |
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2705 // Some memory was committed so release it. |
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2706 size_t bytes_to_release = bytes - bytes_remaining; |
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2707 release_memory(p_buf, bytes_to_release); |
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2708 } |
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2709 #ifdef ASSERT |
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2710 if (UseLargePagesIndividualAllocation && |
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2711 LargePagesIndividualAllocationInjectError) { |
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2712 if (TracePageSizes && Verbose) { |
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2713 tty->print_cr("Reserving large pages individually failed."); |
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2714 } |
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2715 } |
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2716 #endif |
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2717 return NULL; |
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2718 } |
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2719 bytes_remaining -= bytes_to_rq; |
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2720 next_alloc_addr += bytes_to_rq; |
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2721 } |
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2722 |
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2723 return p_buf; |
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2724 |
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2725 } else { |
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2726 // normal policy just allocate it all at once |
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2727 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; |
717 | 2728 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); |
389
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2729 return res; |
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2730 } |
0 | 2731 } |
2732 | |
2733 bool os::release_memory_special(char* base, size_t bytes) { | |
2734 return release_memory(base, bytes); | |
2735 } | |
2736 | |
2737 void os::print_statistics() { | |
2738 } | |
2739 | |
656 | 2740 bool os::commit_memory(char* addr, size_t bytes, bool exec) { |
0 | 2741 if (bytes == 0) { |
2742 // Don't bother the OS with noops. | |
2743 return true; | |
2744 } | |
2745 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); | |
2746 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); | |
2747 // Don't attempt to print anything if the OS call fails. We're | |
2748 // probably low on resources, so the print itself may cause crashes. | |
656 | 2749 bool result = VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) != 0; |
2750 if (result != NULL && exec) { | |
2751 DWORD oldprot; | |
2752 // Windows doc says to use VirtualProtect to get execute permissions | |
2753 return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot) != 0; | |
2754 } else { | |
2755 return result; | |
2756 } | |
0 | 2757 } |
2758 | |
656 | 2759 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, |
2760 bool exec) { | |
2761 return commit_memory(addr, size, exec); | |
0 | 2762 } |
2763 | |
2764 bool os::uncommit_memory(char* addr, size_t bytes) { | |
2765 if (bytes == 0) { | |
2766 // Don't bother the OS with noops. | |
2767 return true; | |
2768 } | |
2769 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); | |
2770 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); | |
2771 return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0; | |
2772 } | |
2773 | |
2774 bool os::release_memory(char* addr, size_t bytes) { | |
2775 return VirtualFree(addr, 0, MEM_RELEASE) != 0; | |
2776 } | |
2777 | |
237
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2778 // Set protections specified |
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2779 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
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2780 bool is_committed) { |
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2781 unsigned int p = 0; |
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2782 switch (prot) { |
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2783 case MEM_PROT_NONE: p = PAGE_NOACCESS; break; |
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2784 case MEM_PROT_READ: p = PAGE_READONLY; break; |
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2785 case MEM_PROT_RW: p = PAGE_READWRITE; break; |
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2786 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; |
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2787 default: |
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2788 ShouldNotReachHere(); |
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2789 } |
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2790 |
0 | 2791 DWORD old_status; |
237
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2792 |
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2793 // Strange enough, but on Win32 one can change protection only for committed |
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2794 // memory, not a big deal anyway, as bytes less or equal than 64K |
656 | 2795 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { |
237
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2796 fatal("cannot commit protection page"); |
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2797 } |
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2798 // One cannot use os::guard_memory() here, as on Win32 guard page |
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2799 // have different (one-shot) semantics, from MSDN on PAGE_GUARD: |
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2800 // |
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2801 // Pages in the region become guard pages. Any attempt to access a guard page |
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2802 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off |
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2803 // the guard page status. Guard pages thus act as a one-time access alarm. |
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2804 return VirtualProtect(addr, bytes, p, &old_status) != 0; |
0 | 2805 } |
2806 | |
2807 bool os::guard_memory(char* addr, size_t bytes) { | |
2808 DWORD old_status; | |
477
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2809 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; |
0 | 2810 } |
2811 | |
2812 bool os::unguard_memory(char* addr, size_t bytes) { | |
2813 DWORD old_status; | |
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2814 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; |
0 | 2815 } |
2816 | |
2817 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } | |
2818 void os::free_memory(char *addr, size_t bytes) { } | |
2819 void os::numa_make_global(char *addr, size_t bytes) { } | |
141 | 2820 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } |
0 | 2821 bool os::numa_topology_changed() { return false; } |
2822 size_t os::numa_get_groups_num() { return 1; } | |
2823 int os::numa_get_group_id() { return 0; } | |
2824 size_t os::numa_get_leaf_groups(int *ids, size_t size) { | |
2825 if (size > 0) { | |
2826 ids[0] = 0; | |
2827 return 1; | |
2828 } | |
2829 return 0; | |
2830 } | |
2831 | |
2832 bool os::get_page_info(char *start, page_info* info) { | |
2833 return false; | |
2834 } | |
2835 | |
2836 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
2837 return end; | |
2838 } | |
2839 | |
2840 char* os::non_memory_address_word() { | |
2841 // Must never look like an address returned by reserve_memory, | |
2842 // even in its subfields (as defined by the CPU immediate fields, | |
2843 // if the CPU splits constants across multiple instructions). | |
2844 return (char*)-1; | |
2845 } | |
2846 | |
2847 #define MAX_ERROR_COUNT 100 | |
2848 #define SYS_THREAD_ERROR 0xffffffffUL | |
2849 | |
2850 void os::pd_start_thread(Thread* thread) { | |
2851 DWORD ret = ResumeThread(thread->osthread()->thread_handle()); | |
2852 // Returns previous suspend state: | |
2853 // 0: Thread was not suspended | |
2854 // 1: Thread is running now | |
2855 // >1: Thread is still suspended. | |
2856 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back | |
2857 } | |
2858 | |
2859 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
2860 return ::read(fd, buf, nBytes); | |
2861 } | |
2862 | |
2863 class HighResolutionInterval { | |
2864 // The default timer resolution seems to be 10 milliseconds. | |
2865 // (Where is this written down?) | |
2866 // If someone wants to sleep for only a fraction of the default, | |
2867 // then we set the timer resolution down to 1 millisecond for | |
2868 // the duration of their interval. | |
2869 // We carefully set the resolution back, since otherwise we | |
2870 // seem to incur an overhead (3%?) that we don't need. | |
2871 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. | |
2872 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). | |
2873 // Alternatively, we could compute the relative error (503/500 = .6%) and only use | |
2874 // timeBeginPeriod() if the relative error exceeded some threshold. | |
2875 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and | |
2876 // to decreased efficiency related to increased timer "tick" rates. We want to minimize | |
2877 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high | |
2878 // resolution timers running. | |
2879 private: | |
2880 jlong resolution; | |
2881 public: | |
2882 HighResolutionInterval(jlong ms) { | |
2883 resolution = ms % 10L; | |
2884 if (resolution != 0) { | |
2885 MMRESULT result = timeBeginPeriod(1L); | |
2886 } | |
2887 } | |
2888 ~HighResolutionInterval() { | |
2889 if (resolution != 0) { | |
2890 MMRESULT result = timeEndPeriod(1L); | |
2891 } | |
2892 resolution = 0L; | |
2893 } | |
2894 }; | |
2895 | |
2896 int os::sleep(Thread* thread, jlong ms, bool interruptable) { | |
2897 jlong limit = (jlong) MAXDWORD; | |
2898 | |
2899 while(ms > limit) { | |
2900 int res; | |
2901 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) | |
2902 return res; | |
2903 ms -= limit; | |
2904 } | |
2905 | |
2906 assert(thread == Thread::current(), "thread consistency check"); | |
2907 OSThread* osthread = thread->osthread(); | |
2908 OSThreadWaitState osts(osthread, false /* not Object.wait() */); | |
2909 int result; | |
2910 if (interruptable) { | |
2911 assert(thread->is_Java_thread(), "must be java thread"); | |
2912 JavaThread *jt = (JavaThread *) thread; | |
2913 ThreadBlockInVM tbivm(jt); | |
2914 | |
2915 jt->set_suspend_equivalent(); | |
2916 // cleared by handle_special_suspend_equivalent_condition() or | |
2917 // java_suspend_self() via check_and_wait_while_suspended() | |
2918 | |
2919 HANDLE events[1]; | |
2920 events[0] = osthread->interrupt_event(); | |
2921 HighResolutionInterval *phri=NULL; | |
2922 if(!ForceTimeHighResolution) | |
2923 phri = new HighResolutionInterval( ms ); | |
2924 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { | |
2925 result = OS_TIMEOUT; | |
2926 } else { | |
2927 ResetEvent(osthread->interrupt_event()); | |
2928 osthread->set_interrupted(false); | |
2929 result = OS_INTRPT; | |
2930 } | |
2931 delete phri; //if it is NULL, harmless | |
2932 | |
2933 // were we externally suspended while we were waiting? | |
2934 jt->check_and_wait_while_suspended(); | |
2935 } else { | |
2936 assert(!thread->is_Java_thread(), "must not be java thread"); | |
2937 Sleep((long) ms); | |
2938 result = OS_TIMEOUT; | |
2939 } | |
2940 return result; | |
2941 } | |
2942 | |
2943 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
2944 void os::infinite_sleep() { | |
2945 while (true) { // sleep forever ... | |
2946 Sleep(100000); // ... 100 seconds at a time | |
2947 } | |
2948 } | |
2949 | |
2950 typedef BOOL (WINAPI * STTSignature)(void) ; | |
2951 | |
2952 os::YieldResult os::NakedYield() { | |
2953 // Use either SwitchToThread() or Sleep(0) | |
2954 // Consider passing back the return value from SwitchToThread(). | |
2955 // We use GetProcAddress() as ancient Win9X versions of windows doen't support SwitchToThread. | |
2956 // In that case we revert to Sleep(0). | |
2957 static volatile STTSignature stt = (STTSignature) 1 ; | |
2958 | |
2959 if (stt == ((STTSignature) 1)) { | |
2960 stt = (STTSignature) ::GetProcAddress (LoadLibrary ("Kernel32.dll"), "SwitchToThread") ; | |
2961 // It's OK if threads race during initialization as the operation above is idempotent. | |
2962 } | |
2963 if (stt != NULL) { | |
2964 return (*stt)() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; | |
2965 } else { | |
2966 Sleep (0) ; | |
2967 } | |
2968 return os::YIELD_UNKNOWN ; | |
2969 } | |
2970 | |
2971 void os::yield() { os::NakedYield(); } | |
2972 | |
2973 void os::yield_all(int attempts) { | |
2974 // Yields to all threads, including threads with lower priorities | |
2975 Sleep(1); | |
2976 } | |
2977 | |
2978 // Win32 only gives you access to seven real priorities at a time, | |
2979 // so we compress Java's ten down to seven. It would be better | |
2980 // if we dynamically adjusted relative priorities. | |
2981 | |
2982 int os::java_to_os_priority[MaxPriority + 1] = { | |
2983 THREAD_PRIORITY_IDLE, // 0 Entry should never be used | |
2984 THREAD_PRIORITY_LOWEST, // 1 MinPriority | |
2985 THREAD_PRIORITY_LOWEST, // 2 | |
2986 THREAD_PRIORITY_BELOW_NORMAL, // 3 | |
2987 THREAD_PRIORITY_BELOW_NORMAL, // 4 | |
2988 THREAD_PRIORITY_NORMAL, // 5 NormPriority | |
2989 THREAD_PRIORITY_NORMAL, // 6 | |
2990 THREAD_PRIORITY_ABOVE_NORMAL, // 7 | |
2991 THREAD_PRIORITY_ABOVE_NORMAL, // 8 | |
2992 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority | |
2993 THREAD_PRIORITY_HIGHEST // 10 MaxPriority | |
2994 }; | |
2995 | |
2996 int prio_policy1[MaxPriority + 1] = { | |
2997 THREAD_PRIORITY_IDLE, // 0 Entry should never be used | |
2998 THREAD_PRIORITY_LOWEST, // 1 MinPriority | |
2999 THREAD_PRIORITY_LOWEST, // 2 | |
3000 THREAD_PRIORITY_BELOW_NORMAL, // 3 | |
3001 THREAD_PRIORITY_BELOW_NORMAL, // 4 | |
3002 THREAD_PRIORITY_NORMAL, // 5 NormPriority | |
3003 THREAD_PRIORITY_ABOVE_NORMAL, // 6 | |
3004 THREAD_PRIORITY_ABOVE_NORMAL, // 7 | |
3005 THREAD_PRIORITY_HIGHEST, // 8 | |
3006 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority | |
3007 THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority | |
3008 }; | |
3009 | |
3010 static int prio_init() { | |
3011 // If ThreadPriorityPolicy is 1, switch tables | |
3012 if (ThreadPriorityPolicy == 1) { | |
3013 int i; | |
3014 for (i = 0; i < MaxPriority + 1; i++) { | |
3015 os::java_to_os_priority[i] = prio_policy1[i]; | |
3016 } | |
3017 } | |
3018 return 0; | |
3019 } | |
3020 | |
3021 OSReturn os::set_native_priority(Thread* thread, int priority) { | |
3022 if (!UseThreadPriorities) return OS_OK; | |
3023 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; | |
3024 return ret ? OS_OK : OS_ERR; | |
3025 } | |
3026 | |
3027 OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { | |
3028 if ( !UseThreadPriorities ) { | |
3029 *priority_ptr = java_to_os_priority[NormPriority]; | |
3030 return OS_OK; | |
3031 } | |
3032 int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); | |
3033 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { | |
3034 assert(false, "GetThreadPriority failed"); | |
3035 return OS_ERR; | |
3036 } | |
3037 *priority_ptr = os_prio; | |
3038 return OS_OK; | |
3039 } | |
3040 | |
3041 | |
3042 // Hint to the underlying OS that a task switch would not be good. | |
3043 // Void return because it's a hint and can fail. | |
3044 void os::hint_no_preempt() {} | |
3045 | |
3046 void os::interrupt(Thread* thread) { | |
3047 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
3048 "possibility of dangling Thread pointer"); | |
3049 | |
3050 OSThread* osthread = thread->osthread(); | |
3051 osthread->set_interrupted(true); | |
3052 // More than one thread can get here with the same value of osthread, | |
3053 // resulting in multiple notifications. We do, however, want the store | |
3054 // to interrupted() to be visible to other threads before we post | |
3055 // the interrupt event. | |
3056 OrderAccess::release(); | |
3057 SetEvent(osthread->interrupt_event()); | |
3058 // For JSR166: unpark after setting status | |
3059 if (thread->is_Java_thread()) | |
3060 ((JavaThread*)thread)->parker()->unpark(); | |
3061 | |
3062 ParkEvent * ev = thread->_ParkEvent ; | |
3063 if (ev != NULL) ev->unpark() ; | |
3064 | |
3065 } | |
3066 | |
3067 | |
3068 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
3069 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
3070 "possibility of dangling Thread pointer"); | |
3071 | |
3072 OSThread* osthread = thread->osthread(); | |
3073 bool interrupted; | |
3074 interrupted = osthread->interrupted(); | |
3075 if (clear_interrupted == true) { | |
3076 osthread->set_interrupted(false); | |
3077 ResetEvent(osthread->interrupt_event()); | |
3078 } // Otherwise leave the interrupted state alone | |
3079 | |
3080 return interrupted; | |
3081 } | |
3082 | |
3083 // Get's a pc (hint) for a running thread. Currently used only for profiling. | |
3084 ExtendedPC os::get_thread_pc(Thread* thread) { | |
3085 CONTEXT context; | |
3086 context.ContextFlags = CONTEXT_CONTROL; | |
3087 HANDLE handle = thread->osthread()->thread_handle(); | |
3088 #ifdef _M_IA64 | |
3089 assert(0, "Fix get_thread_pc"); | |
3090 return ExtendedPC(NULL); | |
3091 #else | |
3092 if (GetThreadContext(handle, &context)) { | |
3093 #ifdef _M_AMD64 | |
3094 return ExtendedPC((address) context.Rip); | |
3095 #else | |
3096 return ExtendedPC((address) context.Eip); | |
3097 #endif | |
3098 } else { | |
3099 return ExtendedPC(NULL); | |
3100 } | |
3101 #endif | |
3102 } | |
3103 | |
3104 // GetCurrentThreadId() returns DWORD | |
3105 intx os::current_thread_id() { return GetCurrentThreadId(); } | |
3106 | |
3107 static int _initial_pid = 0; | |
3108 | |
3109 int os::current_process_id() | |
3110 { | |
3111 return (_initial_pid ? _initial_pid : _getpid()); | |
3112 } | |
3113 | |
3114 int os::win32::_vm_page_size = 0; | |
3115 int os::win32::_vm_allocation_granularity = 0; | |
3116 int os::win32::_processor_type = 0; | |
3117 // Processor level is not available on non-NT systems, use vm_version instead | |
3118 int os::win32::_processor_level = 0; | |
3119 julong os::win32::_physical_memory = 0; | |
3120 size_t os::win32::_default_stack_size = 0; | |
3121 | |
3122 intx os::win32::_os_thread_limit = 0; | |
3123 volatile intx os::win32::_os_thread_count = 0; | |
3124 | |
3125 bool os::win32::_is_nt = false; | |
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3126 bool os::win32::_is_windows_2003 = false; |
0 | 3127 |
3128 | |
3129 void os::win32::initialize_system_info() { | |
3130 SYSTEM_INFO si; | |
3131 GetSystemInfo(&si); | |
3132 _vm_page_size = si.dwPageSize; | |
3133 _vm_allocation_granularity = si.dwAllocationGranularity; | |
3134 _processor_type = si.dwProcessorType; | |
3135 _processor_level = si.wProcessorLevel; | |
3136 _processor_count = si.dwNumberOfProcessors; | |
3137 | |
3138 MEMORYSTATUS ms; | |
3139 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, | |
3140 // dwMemoryLoad (% of memory in use) | |
3141 GlobalMemoryStatus(&ms); | |
3142 _physical_memory = ms.dwTotalPhys; | |
3143 | |
3144 OSVERSIONINFO oi; | |
3145 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); | |
3146 GetVersionEx(&oi); | |
3147 switch(oi.dwPlatformId) { | |
3148 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; | |
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3149 case VER_PLATFORM_WIN32_NT: |
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3150 _is_nt = true; |
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3151 { |
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3152 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; |
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3153 if (os_vers == 5002) { |
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3154 _is_windows_2003 = true; |
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3155 } |
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3156 } |
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3157 break; |
0 | 3158 default: fatal("Unknown platform"); |
3159 } | |
3160 | |
3161 _default_stack_size = os::current_stack_size(); | |
3162 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); | |
3163 assert((_default_stack_size & (_vm_page_size - 1)) == 0, | |
3164 "stack size not a multiple of page size"); | |
3165 | |
3166 initialize_performance_counter(); | |
3167 | |
3168 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is | |
3169 // known to deadlock the system, if the VM issues to thread operations with | |
3170 // a too high frequency, e.g., such as changing the priorities. | |
3171 // The 6000 seems to work well - no deadlocks has been notices on the test | |
3172 // programs that we have seen experience this problem. | |
3173 if (!os::win32::is_nt()) { | |
3174 StarvationMonitorInterval = 6000; | |
3175 } | |
3176 } | |
3177 | |
3178 | |
3179 void os::win32::setmode_streams() { | |
3180 _setmode(_fileno(stdin), _O_BINARY); | |
3181 _setmode(_fileno(stdout), _O_BINARY); | |
3182 _setmode(_fileno(stderr), _O_BINARY); | |
3183 } | |
3184 | |
3185 | |
3186 int os::message_box(const char* title, const char* message) { | |
3187 int result = MessageBox(NULL, message, title, | |
3188 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); | |
3189 return result == IDYES; | |
3190 } | |
3191 | |
3192 int os::allocate_thread_local_storage() { | |
3193 return TlsAlloc(); | |
3194 } | |
3195 | |
3196 | |
3197 void os::free_thread_local_storage(int index) { | |
3198 TlsFree(index); | |
3199 } | |
3200 | |
3201 | |
3202 void os::thread_local_storage_at_put(int index, void* value) { | |
3203 TlsSetValue(index, value); | |
3204 assert(thread_local_storage_at(index) == value, "Just checking"); | |
3205 } | |
3206 | |
3207 | |
3208 void* os::thread_local_storage_at(int index) { | |
3209 return TlsGetValue(index); | |
3210 } | |
3211 | |
3212 | |
3213 #ifndef PRODUCT | |
3214 #ifndef _WIN64 | |
3215 // Helpers to check whether NX protection is enabled | |
3216 int nx_exception_filter(_EXCEPTION_POINTERS *pex) { | |
3217 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && | |
3218 pex->ExceptionRecord->NumberParameters > 0 && | |
3219 pex->ExceptionRecord->ExceptionInformation[0] == | |
3220 EXCEPTION_INFO_EXEC_VIOLATION) { | |
3221 return EXCEPTION_EXECUTE_HANDLER; | |
3222 } | |
3223 return EXCEPTION_CONTINUE_SEARCH; | |
3224 } | |
3225 | |
3226 void nx_check_protection() { | |
3227 // If NX is enabled we'll get an exception calling into code on the stack | |
3228 char code[] = { (char)0xC3 }; // ret | |
3229 void *code_ptr = (void *)code; | |
3230 __try { | |
3231 __asm call code_ptr | |
3232 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { | |
3233 tty->print_raw_cr("NX protection detected."); | |
3234 } | |
3235 } | |
3236 #endif // _WIN64 | |
3237 #endif // PRODUCT | |
3238 | |
3239 // this is called _before_ the global arguments have been parsed | |
3240 void os::init(void) { | |
3241 _initial_pid = _getpid(); | |
3242 | |
3243 init_random(1234567); | |
3244 | |
3245 win32::initialize_system_info(); | |
3246 win32::setmode_streams(); | |
3247 init_page_sizes((size_t) win32::vm_page_size()); | |
3248 | |
3249 // For better scalability on MP systems (must be called after initialize_system_info) | |
3250 #ifndef PRODUCT | |
3251 if (is_MP()) { | |
3252 NoYieldsInMicrolock = true; | |
3253 } | |
3254 #endif | |
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3255 // This may be overridden later when argument processing is done. |
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3256 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, |
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3257 os::win32::is_windows_2003()); |
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3258 |
0 | 3259 // Initialize main_process and main_thread |
3260 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle | |
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3261 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, |
0 | 3262 &main_thread, THREAD_ALL_ACCESS, false, 0)) { |
3263 fatal("DuplicateHandle failed\n"); | |
3264 } | |
3265 main_thread_id = (int) GetCurrentThreadId(); | |
3266 } | |
3267 | |
3268 // To install functions for atexit processing | |
3269 extern "C" { | |
3270 static void perfMemory_exit_helper() { | |
3271 perfMemory_exit(); | |
3272 } | |
3273 } | |
3274 | |
3275 | |
3276 // this is called _after_ the global arguments have been parsed | |
3277 jint os::init_2(void) { | |
3278 // Allocate a single page and mark it as readable for safepoint polling | |
3279 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); | |
3280 guarantee( polling_page != NULL, "Reserve Failed for polling page"); | |
3281 | |
3282 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); | |
3283 guarantee( return_page != NULL, "Commit Failed for polling page"); | |
3284 | |
3285 os::set_polling_page( polling_page ); | |
3286 | |
3287 #ifndef PRODUCT | |
3288 if( Verbose && PrintMiscellaneous ) | |
3289 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
3290 #endif | |
3291 | |
3292 if (!UseMembar) { | |
656 | 3293 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); |
0 | 3294 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); |
3295 | |
656 | 3296 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); |
0 | 3297 guarantee( return_page != NULL, "Commit Failed for memory serialize page"); |
3298 | |
3299 os::set_memory_serialize_page( mem_serialize_page ); | |
3300 | |
3301 #ifndef PRODUCT | |
3302 if(Verbose && PrintMiscellaneous) | |
3303 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
3304 #endif | |
3305 } | |
3306 | |
3307 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); | |
3308 | |
3309 // Setup Windows Exceptions | |
3310 | |
3311 // On Itanium systems, Structured Exception Handling does not | |
3312 // work since stack frames must be walkable by the OS. Since | |
3313 // much of our code is dynamically generated, and we do not have | |
3314 // proper unwind .xdata sections, the system simply exits | |
3315 // rather than delivering the exception. To work around | |
3316 // this we use VectorExceptions instead. | |
3317 #ifdef _WIN64 | |
3318 if (UseVectoredExceptions) { | |
3319 topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter); | |
3320 } | |
3321 #endif | |
3322 | |
3323 // for debugging float code generation bugs | |
3324 if (ForceFloatExceptions) { | |
3325 #ifndef _WIN64 | |
3326 static long fp_control_word = 0; | |
3327 __asm { fstcw fp_control_word } | |
3328 // see Intel PPro Manual, Vol. 2, p 7-16 | |
3329 const long precision = 0x20; | |
3330 const long underflow = 0x10; | |
3331 const long overflow = 0x08; | |
3332 const long zero_div = 0x04; | |
3333 const long denorm = 0x02; | |
3334 const long invalid = 0x01; | |
3335 fp_control_word |= invalid; | |
3336 __asm { fldcw fp_control_word } | |
3337 #endif | |
3338 } | |
3339 | |
3340 // Initialize HPI. | |
3341 jint hpi_result = hpi::initialize(); | |
3342 if (hpi_result != JNI_OK) { return hpi_result; } | |
3343 | |
3344 // If stack_commit_size is 0, windows will reserve the default size, | |
3345 // but only commit a small portion of it. | |
3346 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); | |
3347 size_t default_reserve_size = os::win32::default_stack_size(); | |
3348 size_t actual_reserve_size = stack_commit_size; | |
3349 if (stack_commit_size < default_reserve_size) { | |
3350 // If stack_commit_size == 0, we want this too | |
3351 actual_reserve_size = default_reserve_size; | |
3352 } | |
3353 | |
3354 JavaThread::set_stack_size_at_create(stack_commit_size); | |
3355 | |
3356 // Calculate theoretical max. size of Threads to guard gainst artifical | |
3357 // out-of-memory situations, where all available address-space has been | |
3358 // reserved by thread stacks. | |
3359 assert(actual_reserve_size != 0, "Must have a stack"); | |
3360 | |
3361 // Calculate the thread limit when we should start doing Virtual Memory | |
3362 // banging. Currently when the threads will have used all but 200Mb of space. | |
3363 // | |
3364 // TODO: consider performing a similar calculation for commit size instead | |
3365 // as reserve size, since on a 64-bit platform we'll run into that more | |
3366 // often than running out of virtual memory space. We can use the | |
3367 // lower value of the two calculations as the os_thread_limit. | |
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3368 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); |
0 | 3369 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); |
3370 | |
3371 // at exit methods are called in the reverse order of their registration. | |
3372 // there is no limit to the number of functions registered. atexit does | |
3373 // not set errno. | |
3374 | |
3375 if (PerfAllowAtExitRegistration) { | |
3376 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
3377 // atexit functions can be delayed until process exit time, which | |
3378 // can be problematic for embedded VM situations. Embedded VMs should | |
3379 // call DestroyJavaVM() to assure that VM resources are released. | |
3380 | |
3381 // note: perfMemory_exit_helper atexit function may be removed in | |
3382 // the future if the appropriate cleanup code can be added to the | |
3383 // VM_Exit VMOperation's doit method. | |
3384 if (atexit(perfMemory_exit_helper) != 0) { | |
3385 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); | |
3386 } | |
3387 } | |
3388 | |
3389 // initialize PSAPI or ToolHelp for fatal error handler | |
3390 if (win32::is_nt()) _init_psapi(); | |
3391 else _init_toolhelp(); | |
3392 | |
3393 #ifndef _WIN64 | |
3394 // Print something if NX is enabled (win32 on AMD64) | |
3395 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); | |
3396 #endif | |
3397 | |
3398 // initialize thread priority policy | |
3399 prio_init(); | |
3400 | |
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3401 if (UseNUMA && !ForceNUMA) { |
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3402 UseNUMA = false; // Currently unsupported. |
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3403 } |
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3404 |
0 | 3405 return JNI_OK; |
3406 } | |
3407 | |
3408 | |
3409 // Mark the polling page as unreadable | |
3410 void os::make_polling_page_unreadable(void) { | |
3411 DWORD old_status; | |
3412 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) | |
3413 fatal("Could not disable polling page"); | |
3414 }; | |
3415 | |
3416 // Mark the polling page as readable | |
3417 void os::make_polling_page_readable(void) { | |
3418 DWORD old_status; | |
3419 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) | |
3420 fatal("Could not enable polling page"); | |
3421 }; | |
3422 | |
3423 | |
3424 int os::stat(const char *path, struct stat *sbuf) { | |
3425 char pathbuf[MAX_PATH]; | |
3426 if (strlen(path) > MAX_PATH - 1) { | |
3427 errno = ENAMETOOLONG; | |
3428 return -1; | |
3429 } | |
3430 hpi::native_path(strcpy(pathbuf, path)); | |
3431 int ret = ::stat(pathbuf, sbuf); | |
3432 if (sbuf != NULL && UseUTCFileTimestamp) { | |
3433 // Fix for 6539723. st_mtime returned from stat() is dependent on | |
3434 // the system timezone and so can return different values for the | |
3435 // same file if/when daylight savings time changes. This adjustment | |
3436 // makes sure the same timestamp is returned regardless of the TZ. | |
3437 // | |
3438 // See: | |
3439 // http://msdn.microsoft.com/library/ | |
3440 // default.asp?url=/library/en-us/sysinfo/base/ | |
3441 // time_zone_information_str.asp | |
3442 // and | |
3443 // http://msdn.microsoft.com/library/default.asp?url= | |
3444 // /library/en-us/sysinfo/base/settimezoneinformation.asp | |
3445 // | |
3446 // NOTE: there is a insidious bug here: If the timezone is changed | |
3447 // after the call to stat() but before 'GetTimeZoneInformation()', then | |
3448 // the adjustment we do here will be wrong and we'll return the wrong | |
3449 // value (which will likely end up creating an invalid class data | |
3450 // archive). Absent a better API for this, or some time zone locking | |
3451 // mechanism, we'll have to live with this risk. | |
3452 TIME_ZONE_INFORMATION tz; | |
3453 DWORD tzid = GetTimeZoneInformation(&tz); | |
3454 int daylightBias = | |
3455 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; | |
3456 sbuf->st_mtime += (tz.Bias + daylightBias) * 60; | |
3457 } | |
3458 return ret; | |
3459 } | |
3460 | |
3461 | |
3462 #define FT2INT64(ft) \ | |
3463 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) | |
3464 | |
3465 | |
3466 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
3467 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
3468 // of a thread. | |
3469 // | |
3470 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
3471 // the fast estimate available on the platform. | |
3472 | |
3473 // current_thread_cpu_time() is not optimized for Windows yet | |
3474 jlong os::current_thread_cpu_time() { | |
3475 // return user + sys since the cost is the same | |
3476 return os::thread_cpu_time(Thread::current(), true /* user+sys */); | |
3477 } | |
3478 | |
3479 jlong os::thread_cpu_time(Thread* thread) { | |
3480 // consistent with what current_thread_cpu_time() returns. | |
3481 return os::thread_cpu_time(thread, true /* user+sys */); | |
3482 } | |
3483 | |
3484 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
3485 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
3486 } | |
3487 | |
3488 jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { | |
3489 // This code is copy from clasic VM -> hpi::sysThreadCPUTime | |
3490 // If this function changes, os::is_thread_cpu_time_supported() should too | |
3491 if (os::win32::is_nt()) { | |
3492 FILETIME CreationTime; | |
3493 FILETIME ExitTime; | |
3494 FILETIME KernelTime; | |
3495 FILETIME UserTime; | |
3496 | |
3497 if ( GetThreadTimes(thread->osthread()->thread_handle(), | |
3498 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) | |
3499 return -1; | |
3500 else | |
3501 if (user_sys_cpu_time) { | |
3502 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; | |
3503 } else { | |
3504 return FT2INT64(UserTime) * 100; | |
3505 } | |
3506 } else { | |
3507 return (jlong) timeGetTime() * 1000000; | |
3508 } | |
3509 } | |
3510 | |
3511 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
3512 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits | |
3513 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time | |
3514 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time | |
3515 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
3516 } | |
3517 | |
3518 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
3519 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits | |
3520 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time | |
3521 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time | |
3522 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
3523 } | |
3524 | |
3525 bool os::is_thread_cpu_time_supported() { | |
3526 // see os::thread_cpu_time | |
3527 if (os::win32::is_nt()) { | |
3528 FILETIME CreationTime; | |
3529 FILETIME ExitTime; | |
3530 FILETIME KernelTime; | |
3531 FILETIME UserTime; | |
3532 | |
3533 if ( GetThreadTimes(GetCurrentThread(), | |
3534 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) | |
3535 return false; | |
3536 else | |
3537 return true; | |
3538 } else { | |
3539 return false; | |
3540 } | |
3541 } | |
3542 | |
3543 // Windows does't provide a loadavg primitive so this is stubbed out for now. | |
3544 // It does have primitives (PDH API) to get CPU usage and run queue length. | |
3545 // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" | |
3546 // If we wanted to implement loadavg on Windows, we have a few options: | |
3547 // | |
3548 // a) Query CPU usage and run queue length and "fake" an answer by | |
3549 // returning the CPU usage if it's under 100%, and the run queue | |
3550 // length otherwise. It turns out that querying is pretty slow | |
3551 // on Windows, on the order of 200 microseconds on a fast machine. | |
3552 // Note that on the Windows the CPU usage value is the % usage | |
3553 // since the last time the API was called (and the first call | |
3554 // returns 100%), so we'd have to deal with that as well. | |
3555 // | |
3556 // b) Sample the "fake" answer using a sampling thread and store | |
3557 // the answer in a global variable. The call to loadavg would | |
3558 // just return the value of the global, avoiding the slow query. | |
3559 // | |
3560 // c) Sample a better answer using exponential decay to smooth the | |
3561 // value. This is basically the algorithm used by UNIX kernels. | |
3562 // | |
3563 // Note that sampling thread starvation could affect both (b) and (c). | |
3564 int os::loadavg(double loadavg[], int nelem) { | |
3565 return -1; | |
3566 } | |
3567 | |
3568 | |
3569 // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() | |
3570 bool os::dont_yield() { | |
3571 return DontYieldALot; | |
3572 } | |
3573 | |
3574 // Is a (classpath) directory empty? | |
3575 bool os::dir_is_empty(const char* path) { | |
3576 WIN32_FIND_DATA fd; | |
3577 HANDLE f = FindFirstFile(path, &fd); | |
3578 if (f == INVALID_HANDLE_VALUE) { | |
3579 return true; | |
3580 } | |
3581 FindClose(f); | |
3582 return false; | |
3583 } | |
3584 | |
3585 // create binary file, rewriting existing file if required | |
3586 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
3587 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; | |
3588 if (!rewrite_existing) { | |
3589 oflags |= _O_EXCL; | |
3590 } | |
3591 return ::open(path, oflags, _S_IREAD | _S_IWRITE); | |
3592 } | |
3593 | |
3594 // return current position of file pointer | |
3595 jlong os::current_file_offset(int fd) { | |
3596 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); | |
3597 } | |
3598 | |
3599 // move file pointer to the specified offset | |
3600 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
3601 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); | |
3602 } | |
3603 | |
3604 | |
3605 // Map a block of memory. | |
3606 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
3607 char *addr, size_t bytes, bool read_only, | |
3608 bool allow_exec) { | |
3609 HANDLE hFile; | |
3610 char* base; | |
3611 | |
3612 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, | |
3613 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); | |
3614 if (hFile == NULL) { | |
3615 if (PrintMiscellaneous && Verbose) { | |
3616 DWORD err = GetLastError(); | |
3617 tty->print_cr("CreateFile() failed: GetLastError->%ld."); | |
3618 } | |
3619 return NULL; | |
3620 } | |
3621 | |
3622 if (allow_exec) { | |
3623 // CreateFileMapping/MapViewOfFileEx can't map executable memory | |
3624 // unless it comes from a PE image (which the shared archive is not.) | |
3625 // Even VirtualProtect refuses to give execute access to mapped memory | |
3626 // that was not previously executable. | |
3627 // | |
3628 // Instead, stick the executable region in anonymous memory. Yuck. | |
3629 // Penalty is that ~4 pages will not be shareable - in the future | |
3630 // we might consider DLLizing the shared archive with a proper PE | |
3631 // header so that mapping executable + sharing is possible. | |
3632 | |
3633 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, | |
3634 PAGE_READWRITE); | |
3635 if (base == NULL) { | |
3636 if (PrintMiscellaneous && Verbose) { | |
3637 DWORD err = GetLastError(); | |
3638 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); | |
3639 } | |
3640 CloseHandle(hFile); | |
3641 return NULL; | |
3642 } | |
3643 | |
3644 DWORD bytes_read; | |
3645 OVERLAPPED overlapped; | |
3646 overlapped.Offset = (DWORD)file_offset; | |
3647 overlapped.OffsetHigh = 0; | |
3648 overlapped.hEvent = NULL; | |
3649 // ReadFile guarantees that if the return value is true, the requested | |
3650 // number of bytes were read before returning. | |
3651 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; | |
3652 if (!res) { | |
3653 if (PrintMiscellaneous && Verbose) { | |
3654 DWORD err = GetLastError(); | |
3655 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); | |
3656 } | |
3657 release_memory(base, bytes); | |
3658 CloseHandle(hFile); | |
3659 return NULL; | |
3660 } | |
3661 } else { | |
3662 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, | |
3663 NULL /*file_name*/); | |
3664 if (hMap == NULL) { | |
3665 if (PrintMiscellaneous && Verbose) { | |
3666 DWORD err = GetLastError(); | |
3667 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld."); | |
3668 } | |
3669 CloseHandle(hFile); | |
3670 return NULL; | |
3671 } | |
3672 | |
3673 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; | |
3674 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, | |
3675 (DWORD)bytes, addr); | |
3676 if (base == NULL) { | |
3677 if (PrintMiscellaneous && Verbose) { | |
3678 DWORD err = GetLastError(); | |
3679 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); | |
3680 } | |
3681 CloseHandle(hMap); | |
3682 CloseHandle(hFile); | |
3683 return NULL; | |
3684 } | |
3685 | |
3686 if (CloseHandle(hMap) == 0) { | |
3687 if (PrintMiscellaneous && Verbose) { | |
3688 DWORD err = GetLastError(); | |
3689 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); | |
3690 } | |
3691 CloseHandle(hFile); | |
3692 return base; | |
3693 } | |
3694 } | |
3695 | |
3696 if (allow_exec) { | |
3697 DWORD old_protect; | |
3698 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; | |
3699 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; | |
3700 | |
3701 if (!res) { | |
3702 if (PrintMiscellaneous && Verbose) { | |
3703 DWORD err = GetLastError(); | |
3704 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); | |
3705 } | |
3706 // Don't consider this a hard error, on IA32 even if the | |
3707 // VirtualProtect fails, we should still be able to execute | |
3708 CloseHandle(hFile); | |
3709 return base; | |
3710 } | |
3711 } | |
3712 | |
3713 if (CloseHandle(hFile) == 0) { | |
3714 if (PrintMiscellaneous && Verbose) { | |
3715 DWORD err = GetLastError(); | |
3716 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); | |
3717 } | |
3718 return base; | |
3719 } | |
3720 | |
3721 return base; | |
3722 } | |
3723 | |
3724 | |
3725 // Remap a block of memory. | |
3726 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
3727 char *addr, size_t bytes, bool read_only, | |
3728 bool allow_exec) { | |
3729 // This OS does not allow existing memory maps to be remapped so we | |
3730 // have to unmap the memory before we remap it. | |
3731 if (!os::unmap_memory(addr, bytes)) { | |
3732 return NULL; | |
3733 } | |
3734 | |
3735 // There is a very small theoretical window between the unmap_memory() | |
3736 // call above and the map_memory() call below where a thread in native | |
3737 // code may be able to access an address that is no longer mapped. | |
3738 | |
3739 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
3740 allow_exec); | |
3741 } | |
3742 | |
3743 | |
3744 // Unmap a block of memory. | |
3745 // Returns true=success, otherwise false. | |
3746 | |
3747 bool os::unmap_memory(char* addr, size_t bytes) { | |
3748 BOOL result = UnmapViewOfFile(addr); | |
3749 if (result == 0) { | |
3750 if (PrintMiscellaneous && Verbose) { | |
3751 DWORD err = GetLastError(); | |
3752 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); | |
3753 } | |
3754 return false; | |
3755 } | |
3756 return true; | |
3757 } | |
3758 | |
3759 void os::pause() { | |
3760 char filename[MAX_PATH]; | |
3761 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
3762 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
3763 } else { | |
3764 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
3765 } | |
3766 | |
3767 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
3768 if (fd != -1) { | |
3769 struct stat buf; | |
3770 close(fd); | |
3771 while (::stat(filename, &buf) == 0) { | |
3772 Sleep(100); | |
3773 } | |
3774 } else { | |
3775 jio_fprintf(stderr, | |
3776 "Could not open pause file '%s', continuing immediately.\n", filename); | |
3777 } | |
3778 } | |
3779 | |
3780 // An Event wraps a win32 "CreateEvent" kernel handle. | |
3781 // | |
3782 // We have a number of choices regarding "CreateEvent" win32 handle leakage: | |
3783 // | |
3784 // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle | |
3785 // field, and call CloseHandle() on the win32 event handle. Unpark() would | |
3786 // need to be modified to tolerate finding a NULL (invalid) win32 event handle. | |
3787 // In addition, an unpark() operation might fetch the handle field, but the | |
3788 // event could recycle between the fetch and the SetEvent() operation. | |
3789 // SetEvent() would either fail because the handle was invalid, or inadvertently work, | |
3790 // as the win32 handle value had been recycled. In an ideal world calling SetEvent() | |
3791 // on an stale but recycled handle would be harmless, but in practice this might | |
3792 // confuse other non-Sun code, so it's not a viable approach. | |
3793 // | |
3794 // 2: Once a win32 event handle is associated with an Event, it remains associated | |
3795 // with the Event. The event handle is never closed. This could be construed | |
3796 // as handle leakage, but only up to the maximum # of threads that have been extant | |
3797 // at any one time. This shouldn't be an issue, as windows platforms typically | |
3798 // permit a process to have hundreds of thousands of open handles. | |
3799 // | |
3800 // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList | |
3801 // and release unused handles. | |
3802 // | |
3803 // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. | |
3804 // It's not clear, however, that we wouldn't be trading one type of leak for another. | |
3805 // | |
3806 // 5. Use an RCU-like mechanism (Read-Copy Update). | |
3807 // Or perhaps something similar to Maged Michael's "Hazard pointers". | |
3808 // | |
3809 // We use (2). | |
3810 // | |
3811 // TODO-FIXME: | |
3812 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. | |
3813 // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks | |
3814 // to recover from (or at least detect) the dreaded Windows 841176 bug. | |
3815 // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent | |
3816 // into a single win32 CreateEvent() handle. | |
3817 // | |
3818 // _Event transitions in park() | |
3819 // -1 => -1 : illegal | |
3820 // 1 => 0 : pass - return immediately | |
3821 // 0 => -1 : block | |
3822 // | |
3823 // _Event serves as a restricted-range semaphore : | |
3824 // -1 : thread is blocked | |
3825 // 0 : neutral - thread is running or ready | |
3826 // 1 : signaled - thread is running or ready | |
3827 // | |
3828 // Another possible encoding of _Event would be | |
3829 // with explicit "PARKED" and "SIGNALED" bits. | |
3830 | |
3831 int os::PlatformEvent::park (jlong Millis) { | |
3832 guarantee (_ParkHandle != NULL , "Invariant") ; | |
3833 guarantee (Millis > 0 , "Invariant") ; | |
3834 int v ; | |
3835 | |
3836 // CONSIDER: defer assigning a CreateEvent() handle to the Event until | |
3837 // the initial park() operation. | |
3838 | |
3839 for (;;) { | |
3840 v = _Event ; | |
3841 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
3842 } | |
3843 guarantee ((v == 0) || (v == 1), "invariant") ; | |
3844 if (v != 0) return OS_OK ; | |
3845 | |
3846 // Do this the hard way by blocking ... | |
3847 // TODO: consider a brief spin here, gated on the success of recent | |
3848 // spin attempts by this thread. | |
3849 // | |
3850 // We decompose long timeouts into series of shorter timed waits. | |
3851 // Evidently large timo values passed in WaitForSingleObject() are problematic on some | |
3852 // versions of Windows. See EventWait() for details. This may be superstition. Or not. | |
3853 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time | |
3854 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from | |
3855 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend | |
3856 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == | |
3857 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate | |
3858 // for the already waited time. This policy does not admit any new outcomes. | |
3859 // In the future, however, we might want to track the accumulated wait time and | |
3860 // adjust Millis accordingly if we encounter a spurious wakeup. | |
3861 | |
3862 const int MAXTIMEOUT = 0x10000000 ; | |
3863 DWORD rv = WAIT_TIMEOUT ; | |
3864 while (_Event < 0 && Millis > 0) { | |
3865 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) | |
3866 if (Millis > MAXTIMEOUT) { | |
3867 prd = MAXTIMEOUT ; | |
3868 } | |
3869 rv = ::WaitForSingleObject (_ParkHandle, prd) ; | |
3870 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; | |
3871 if (rv == WAIT_TIMEOUT) { | |
3872 Millis -= prd ; | |
3873 } | |
3874 } | |
3875 v = _Event ; | |
3876 _Event = 0 ; | |
3877 OrderAccess::fence() ; | |
3878 // If we encounter a nearly simultanous timeout expiry and unpark() | |
3879 // we return OS_OK indicating we awoke via unpark(). | |
3880 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. | |
3881 return (v >= 0) ? OS_OK : OS_TIMEOUT ; | |
3882 } | |
3883 | |
3884 void os::PlatformEvent::park () { | |
3885 guarantee (_ParkHandle != NULL, "Invariant") ; | |
3886 // Invariant: Only the thread associated with the Event/PlatformEvent | |
3887 // may call park(). | |
3888 int v ; | |
3889 for (;;) { | |
3890 v = _Event ; | |
3891 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
3892 } | |
3893 guarantee ((v == 0) || (v == 1), "invariant") ; | |
3894 if (v != 0) return ; | |
3895 | |
3896 // Do this the hard way by blocking ... | |
3897 // TODO: consider a brief spin here, gated on the success of recent | |
3898 // spin attempts by this thread. | |
3899 while (_Event < 0) { | |
3900 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; | |
3901 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; | |
3902 } | |
3903 | |
3904 // Usually we'll find _Event == 0 at this point, but as | |
3905 // an optional optimization we clear it, just in case can | |
3906 // multiple unpark() operations drove _Event up to 1. | |
3907 _Event = 0 ; | |
3908 OrderAccess::fence() ; | |
3909 guarantee (_Event >= 0, "invariant") ; | |
3910 } | |
3911 | |
3912 void os::PlatformEvent::unpark() { | |
3913 guarantee (_ParkHandle != NULL, "Invariant") ; | |
3914 int v ; | |
3915 for (;;) { | |
3916 v = _Event ; // Increment _Event if it's < 1. | |
3917 if (v > 0) { | |
3918 // If it's already signaled just return. | |
3919 // The LD of _Event could have reordered or be satisfied | |
3920 // by a read-aside from this processor's write buffer. | |
3921 // To avoid problems execute a barrier and then | |
3922 // ratify the value. A degenerate CAS() would also work. | |
3923 // Viz., CAS (v+0, &_Event, v) == v). | |
3924 OrderAccess::fence() ; | |
3925 if (_Event == v) return ; | |
3926 continue ; | |
3927 } | |
3928 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; | |
3929 } | |
3930 if (v < 0) { | |
3931 ::SetEvent (_ParkHandle) ; | |
3932 } | |
3933 } | |
3934 | |
3935 | |
3936 // JSR166 | |
3937 // ------------------------------------------------------- | |
3938 | |
3939 /* | |
3940 * The Windows implementation of Park is very straightforward: Basic | |
3941 * operations on Win32 Events turn out to have the right semantics to | |
3942 * use them directly. We opportunistically resuse the event inherited | |
3943 * from Monitor. | |
3944 */ | |
3945 | |
3946 | |
3947 void Parker::park(bool isAbsolute, jlong time) { | |
3948 guarantee (_ParkEvent != NULL, "invariant") ; | |
3949 // First, demultiplex/decode time arguments | |
3950 if (time < 0) { // don't wait | |
3951 return; | |
3952 } | |
3953 else if (time == 0) { | |
3954 time = INFINITE; | |
3955 } | |
3956 else if (isAbsolute) { | |
3957 time -= os::javaTimeMillis(); // convert to relative time | |
3958 if (time <= 0) // already elapsed | |
3959 return; | |
3960 } | |
3961 else { // relative | |
3962 time /= 1000000; // Must coarsen from nanos to millis | |
3963 if (time == 0) // Wait for the minimal time unit if zero | |
3964 time = 1; | |
3965 } | |
3966 | |
3967 JavaThread* thread = (JavaThread*)(Thread::current()); | |
3968 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
3969 JavaThread *jt = (JavaThread *)thread; | |
3970 | |
3971 // Don't wait if interrupted or already triggered | |
3972 if (Thread::is_interrupted(thread, false) || | |
3973 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { | |
3974 ResetEvent(_ParkEvent); | |
3975 return; | |
3976 } | |
3977 else { | |
3978 ThreadBlockInVM tbivm(jt); | |
3979 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
3980 jt->set_suspend_equivalent(); | |
3981 | |
3982 WaitForSingleObject(_ParkEvent, time); | |
3983 ResetEvent(_ParkEvent); | |
3984 | |
3985 // If externally suspended while waiting, re-suspend | |
3986 if (jt->handle_special_suspend_equivalent_condition()) { | |
3987 jt->java_suspend_self(); | |
3988 } | |
3989 } | |
3990 } | |
3991 | |
3992 void Parker::unpark() { | |
3993 guarantee (_ParkEvent != NULL, "invariant") ; | |
3994 SetEvent(_ParkEvent); | |
3995 } | |
3996 | |
3997 // Run the specified command in a separate process. Return its exit value, | |
3998 // or -1 on failure (e.g. can't create a new process). | |
3999 int os::fork_and_exec(char* cmd) { | |
4000 STARTUPINFO si; | |
4001 PROCESS_INFORMATION pi; | |
4002 | |
4003 memset(&si, 0, sizeof(si)); | |
4004 si.cb = sizeof(si); | |
4005 memset(&pi, 0, sizeof(pi)); | |
4006 BOOL rslt = CreateProcess(NULL, // executable name - use command line | |
4007 cmd, // command line | |
4008 NULL, // process security attribute | |
4009 NULL, // thread security attribute | |
4010 TRUE, // inherits system handles | |
4011 0, // no creation flags | |
4012 NULL, // use parent's environment block | |
4013 NULL, // use parent's starting directory | |
4014 &si, // (in) startup information | |
4015 &pi); // (out) process information | |
4016 | |
4017 if (rslt) { | |
4018 // Wait until child process exits. | |
4019 WaitForSingleObject(pi.hProcess, INFINITE); | |
4020 | |
4021 DWORD exit_code; | |
4022 GetExitCodeProcess(pi.hProcess, &exit_code); | |
4023 | |
4024 // Close process and thread handles. | |
4025 CloseHandle(pi.hProcess); | |
4026 CloseHandle(pi.hThread); | |
4027 | |
4028 return (int)exit_code; | |
4029 } else { | |
4030 return -1; | |
4031 } | |
4032 } | |
4033 | |
4034 //-------------------------------------------------------------------------------------------------- | |
4035 // Non-product code | |
4036 | |
4037 static int mallocDebugIntervalCounter = 0; | |
4038 static int mallocDebugCounter = 0; | |
4039 bool os::check_heap(bool force) { | |
4040 if (++mallocDebugCounter < MallocVerifyStart && !force) return true; | |
4041 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { | |
4042 // Note: HeapValidate executes two hardware breakpoints when it finds something | |
4043 // wrong; at these points, eax contains the address of the offending block (I think). | |
4044 // To get to the exlicit error message(s) below, just continue twice. | |
4045 HANDLE heap = GetProcessHeap(); | |
4046 { HeapLock(heap); | |
4047 PROCESS_HEAP_ENTRY phe; | |
4048 phe.lpData = NULL; | |
4049 while (HeapWalk(heap, &phe) != 0) { | |
4050 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && | |
4051 !HeapValidate(heap, 0, phe.lpData)) { | |
4052 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); | |
4053 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); | |
4054 fatal("corrupted C heap"); | |
4055 } | |
4056 } | |
4057 int err = GetLastError(); | |
4058 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { | |
4059 fatal1("heap walk aborted with error %d", err); | |
4060 } | |
4061 HeapUnlock(heap); | |
4062 } | |
4063 mallocDebugIntervalCounter = 0; | |
4064 } | |
4065 return true; | |
4066 } | |
4067 | |
4068 | |
4069 #ifndef PRODUCT | |
4070 bool os::find(address addr) { | |
4071 // Nothing yet | |
4072 return false; | |
4073 } | |
4074 #endif | |
4075 | |
4076 LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { | |
4077 DWORD exception_code = e->ExceptionRecord->ExceptionCode; | |
4078 | |
4079 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { | |
4080 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); | |
4081 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; | |
4082 address addr = (address) exceptionRecord->ExceptionInformation[1]; | |
4083 | |
4084 if (os::is_memory_serialize_page(thread, addr)) | |
4085 return EXCEPTION_CONTINUE_EXECUTION; | |
4086 } | |
4087 | |
4088 return EXCEPTION_CONTINUE_SEARCH; | |
4089 } | |
4090 | |
4091 static int getLastErrorString(char *buf, size_t len) | |
4092 { | |
4093 long errval; | |
4094 | |
4095 if ((errval = GetLastError()) != 0) | |
4096 { | |
4097 /* DOS error */ | |
4098 size_t n = (size_t)FormatMessage( | |
4099 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, | |
4100 NULL, | |
4101 errval, | |
4102 0, | |
4103 buf, | |
4104 (DWORD)len, | |
4105 NULL); | |
4106 if (n > 3) { | |
4107 /* Drop final '.', CR, LF */ | |
4108 if (buf[n - 1] == '\n') n--; | |
4109 if (buf[n - 1] == '\r') n--; | |
4110 if (buf[n - 1] == '.') n--; | |
4111 buf[n] = '\0'; | |
4112 } | |
4113 return (int)n; | |
4114 } | |
4115 | |
4116 if (errno != 0) | |
4117 { | |
4118 /* C runtime error that has no corresponding DOS error code */ | |
4119 const char *s = strerror(errno); | |
4120 size_t n = strlen(s); | |
4121 if (n >= len) n = len - 1; | |
4122 strncpy(buf, s, n); | |
4123 buf[n] = '\0'; | |
4124 return (int)n; | |
4125 } | |
4126 return 0; | |
4127 } |