1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // Must be at least Windows 2000 or XP to use IsDebuggerPresent
26 #define _WIN32_WINNT 0x500
27
28 // no precompiled headers
29 #include "classfile/classLoader.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/icBuffer.hpp"
33 #include "code/vtableStubs.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/disassembler.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "jvm_windows.h"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/filemap.hpp"
40 #include "mutex_windows.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "os_share_windows.hpp"
43 #include "prims/jniFastGetField.hpp"
44 #include "prims/jvm.h"
45 #include "prims/jvm_misc.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/extendedPC.hpp"
48 #include "runtime/globals.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/mutexLocker.hpp"
53 #include "runtime/objectMonitor.hpp"
54 #include "runtime/osThread.hpp"
55 #include "runtime/perfMemory.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/statSampler.hpp"
58 #include "runtime/stubRoutines.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadCritical.hpp"
61 #include "runtime/timer.hpp"
62 #include "services/attachListener.hpp"
63 #include "services/memTracker.hpp"
64 #include "services/runtimeService.hpp"
65 #include "utilities/decoder.hpp"
66 #include "utilities/defaultStream.hpp"
67 #include "utilities/events.hpp"
68 #include "utilities/growableArray.hpp"
69 #include "utilities/vmError.hpp"
70
71 #ifdef _DEBUG
72 #include <crtdbg.h>
73 #endif
74
75
76 #include <windows.h>
77 #include <sys/types.h>
78 #include <sys/stat.h>
79 #include <sys/timeb.h>
80 #include <objidl.h>
81 #include <shlobj.h>
82
83 #include <malloc.h>
84 #include <signal.h>
85 #include <direct.h>
86 #include <errno.h>
87 #include <fcntl.h>
88 #include <io.h>
89 #include <process.h> // For _beginthreadex(), _endthreadex()
90 #include <imagehlp.h> // For os::dll_address_to_function_name
91 /* for enumerating dll libraries */
92 #include <vdmdbg.h>
93
94 // for timer info max values which include all bits
95 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
96
97 // For DLL loading/load error detection
98 // Values of PE COFF
99 #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c
100 #define IMAGE_FILE_SIGNATURE_LENGTH 4
101
102 static HANDLE main_process;
103 static HANDLE main_thread;
104 static int main_thread_id;
105
106 static FILETIME process_creation_time;
107 static FILETIME process_exit_time;
108 static FILETIME process_user_time;
109 static FILETIME process_kernel_time;
110
111 #ifdef _M_IA64
112 #define __CPU__ ia64
113 #elif _M_AMD64
114 #define __CPU__ amd64
115 #else
116 #define __CPU__ i486
117 #endif
118
119 // save DLL module handle, used by GetModuleFileName
120
121 HINSTANCE vm_lib_handle;
122
123 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
124 switch (reason) {
125 case DLL_PROCESS_ATTACH:
126 vm_lib_handle = hinst;
127 if(ForceTimeHighResolution)
128 timeBeginPeriod(1L);
129 break;
130 case DLL_PROCESS_DETACH:
131 if(ForceTimeHighResolution)
132 timeEndPeriod(1L);
133 break;
134 default:
135 break;
136 }
137 return true;
138 }
139
140 static inline double fileTimeAsDouble(FILETIME* time) {
141 const double high = (double) ((unsigned int) ~0);
142 const double split = 10000000.0;
143 double result = (time->dwLowDateTime / split) +
144 time->dwHighDateTime * (high/split);
145 return result;
146 }
147
148 // Implementation of os
149
150 bool os::getenv(const char* name, char* buffer, int len) {
151 int result = GetEnvironmentVariable(name, buffer, len);
152 return result > 0 && result < len;
153 }
154
155
156 // No setuid programs under Windows.
157 bool os::have_special_privileges() {
158 return false;
159 }
160
161
162 // This method is a periodic task to check for misbehaving JNI applications
163 // under CheckJNI, we can add any periodic checks here.
164 // For Windows at the moment does nothing
165 void os::run_periodic_checks() {
166 return;
167 }
168
169 #ifndef _WIN64
170 // previous UnhandledExceptionFilter, if there is one
171 static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL;
172
173 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo);
174 #endif
175 void os::init_system_properties_values() {
176 /* sysclasspath, java_home, dll_dir */
177 {
178 char *home_path;
179 char *dll_path;
180 char *pslash;
181 char *bin = "\\bin";
182 char home_dir[MAX_PATH];
183
184 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) {
185 os::jvm_path(home_dir, sizeof(home_dir));
186 // Found the full path to jvm.dll.
187 // Now cut the path to <java_home>/jre if we can.
188 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */
189 pslash = strrchr(home_dir, '\\');
190 if (pslash != NULL) {
191 *pslash = '\0'; /* get rid of \{client|server} */
192 pslash = strrchr(home_dir, '\\');
193 if (pslash != NULL)
194 *pslash = '\0'; /* get rid of \bin */
195 }
196 }
197
198 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1, mtInternal);
199 if (home_path == NULL)
200 return;
201 strcpy(home_path, home_dir);
202 Arguments::set_java_home(home_path);
203
204 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1, mtInternal);
205 if (dll_path == NULL)
206 return;
207 strcpy(dll_path, home_dir);
208 strcat(dll_path, bin);
209 Arguments::set_dll_dir(dll_path);
210
211 if (!set_boot_path('\\', ';'))
212 return;
213 }
214
215 /* library_path */
216 #define EXT_DIR "\\lib\\ext"
217 #define BIN_DIR "\\bin"
218 #define PACKAGE_DIR "\\Sun\\Java"
219 {
220 /* Win32 library search order (See the documentation for LoadLibrary):
221 *
222 * 1. The directory from which application is loaded.
223 * 2. The system wide Java Extensions directory (Java only)
224 * 3. System directory (GetSystemDirectory)
225 * 4. Windows directory (GetWindowsDirectory)
226 * 5. The PATH environment variable
227 * 6. The current directory
228 */
229
230 char *library_path;
231 char tmp[MAX_PATH];
232 char *path_str = ::getenv("PATH");
233
234 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) +
235 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10, mtInternal);
236
237 library_path[0] = '\0';
238
239 GetModuleFileName(NULL, tmp, sizeof(tmp));
240 *(strrchr(tmp, '\\')) = '\0';
241 strcat(library_path, tmp);
242
243 GetWindowsDirectory(tmp, sizeof(tmp));
244 strcat(library_path, ";");
245 strcat(library_path, tmp);
246 strcat(library_path, PACKAGE_DIR BIN_DIR);
247
248 GetSystemDirectory(tmp, sizeof(tmp));
249 strcat(library_path, ";");
250 strcat(library_path, tmp);
251
252 GetWindowsDirectory(tmp, sizeof(tmp));
253 strcat(library_path, ";");
254 strcat(library_path, tmp);
255
256 if (path_str) {
257 strcat(library_path, ";");
258 strcat(library_path, path_str);
259 }
260
261 strcat(library_path, ";.");
262
263 Arguments::set_library_path(library_path);
264 FREE_C_HEAP_ARRAY(char, library_path, mtInternal);
265 }
266
267 /* Default extensions directory */
268 {
269 char path[MAX_PATH];
270 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1];
271 GetWindowsDirectory(path, MAX_PATH);
272 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR,
273 path, PACKAGE_DIR, EXT_DIR);
274 Arguments::set_ext_dirs(buf);
275 }
276 #undef EXT_DIR
277 #undef BIN_DIR
278 #undef PACKAGE_DIR
279
280 /* Default endorsed standards directory. */
281 {
282 #define ENDORSED_DIR "\\lib\\endorsed"
283 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR);
284 char * buf = NEW_C_HEAP_ARRAY(char, len, mtInternal);
285 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR);
286 Arguments::set_endorsed_dirs(buf);
287 #undef ENDORSED_DIR
288 }
289
290 #ifndef _WIN64
291 // set our UnhandledExceptionFilter and save any previous one
292 prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception);
293 #endif
294
295 // Done
296 return;
297 }
298
299 void os::breakpoint() {
300 DebugBreak();
301 }
302
303 // Invoked from the BREAKPOINT Macro
304 extern "C" void breakpoint() {
305 os::breakpoint();
306 }
307
308 /*
309 * RtlCaptureStackBackTrace Windows API may not exist prior to Windows XP.
310 * So far, this method is only used by Native Memory Tracking, which is
311 * only supported on Windows XP or later.
312 */
313 address os::get_caller_pc(int n) {
314 #ifdef _NMT_NOINLINE_
315 n ++;
316 #endif
317 address pc;
318 if (os::Kernel32Dll::RtlCaptureStackBackTrace(n + 1, 1, (PVOID*)&pc, NULL) == 1) {
319 return pc;
320 }
321 return NULL;
322 }
323
324
325 // os::current_stack_base()
326 //
327 // Returns the base of the stack, which is the stack's
328 // starting address. This function must be called
329 // while running on the stack of the thread being queried.
330
331 address os::current_stack_base() {
332 MEMORY_BASIC_INFORMATION minfo;
333 address stack_bottom;
334 size_t stack_size;
335
336 VirtualQuery(&minfo, &minfo, sizeof(minfo));
337 stack_bottom = (address)minfo.AllocationBase;
338 stack_size = minfo.RegionSize;
339
340 // Add up the sizes of all the regions with the same
341 // AllocationBase.
342 while( 1 )
343 {
344 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo));
345 if ( stack_bottom == (address)minfo.AllocationBase )
346 stack_size += minfo.RegionSize;
347 else
348 break;
349 }
350
351 #ifdef _M_IA64
352 // IA64 has memory and register stacks
353 //
354 // This is the stack layout you get on NT/IA64 if you specify 1MB stack limit
355 // at thread creation (1MB backing store growing upwards, 1MB memory stack
356 // growing downwards, 2MB summed up)
357 //
358 // ...
359 // ------- top of stack (high address) -----
360 // |
361 // | 1MB
362 // | Backing Store (Register Stack)
363 // |
364 // | / \
365 // | |
366 // | |
367 // | |
368 // ------------------------ stack base -----
369 // | 1MB
370 // | Memory Stack
371 // |
372 // | |
373 // | |
374 // | |
375 // | \ /
376 // |
377 // ----- bottom of stack (low address) -----
378 // ...
379
380 stack_size = stack_size / 2;
381 #endif
382 return stack_bottom + stack_size;
383 }
384
385 size_t os::current_stack_size() {
386 size_t sz;
387 MEMORY_BASIC_INFORMATION minfo;
388 VirtualQuery(&minfo, &minfo, sizeof(minfo));
389 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
390 return sz;
391 }
392
393 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
394 const struct tm* time_struct_ptr = localtime(clock);
395 if (time_struct_ptr != NULL) {
396 *res = *time_struct_ptr;
397 return res;
398 }
399 return NULL;
400 }
401
402 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo);
403
404 // Thread start routine for all new Java threads
405 static unsigned __stdcall java_start(Thread* thread) {
406 // Try to randomize the cache line index of hot stack frames.
407 // This helps when threads of the same stack traces evict each other's
408 // cache lines. The threads can be either from the same JVM instance, or
409 // from different JVM instances. The benefit is especially true for
410 // processors with hyperthreading technology.
411 static int counter = 0;
412 int pid = os::current_process_id();
413 _alloca(((pid ^ counter++) & 7) * 128);
414
415 OSThread* osthr = thread->osthread();
416 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
417
418 if (UseNUMA) {
419 int lgrp_id = os::numa_get_group_id();
420 if (lgrp_id != -1) {
421 thread->set_lgrp_id(lgrp_id);
422 }
423 }
424
425
426 // Install a win32 structured exception handler around every thread created
427 // by VM, so VM can genrate error dump when an exception occurred in non-
428 // Java thread (e.g. VM thread).
429 __try {
430 thread->run();
431 } __except(topLevelExceptionFilter(
432 (_EXCEPTION_POINTERS*)_exception_info())) {
433 // Nothing to do.
434 }
435
436 // One less thread is executing
437 // When the VMThread gets here, the main thread may have already exited
438 // which frees the CodeHeap containing the Atomic::add code
439 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
440 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count);
441 }
442
443 return 0;
444 }
445
446 static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) {
447 // Allocate the OSThread object
448 OSThread* osthread = new OSThread(NULL, NULL);
449 if (osthread == NULL) return NULL;
450
451 // Initialize support for Java interrupts
452 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
453 if (interrupt_event == NULL) {
454 delete osthread;
455 return NULL;
456 }
457 osthread->set_interrupt_event(interrupt_event);
458
459 // Store info on the Win32 thread into the OSThread
460 osthread->set_thread_handle(thread_handle);
461 osthread->set_thread_id(thread_id);
462
463 if (UseNUMA) {
464 int lgrp_id = os::numa_get_group_id();
465 if (lgrp_id != -1) {
466 thread->set_lgrp_id(lgrp_id);
467 }
468 }
469
470 // Initial thread state is INITIALIZED, not SUSPENDED
471 osthread->set_state(INITIALIZED);
472
473 return osthread;
474 }
475
476
477 bool os::create_attached_thread(JavaThread* thread) {
478 #ifdef ASSERT
479 thread->verify_not_published();
480 #endif
481 HANDLE thread_h;
482 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(),
483 &thread_h, THREAD_ALL_ACCESS, false, 0)) {
484 fatal("DuplicateHandle failed\n");
485 }
486 OSThread* osthread = create_os_thread(thread, thread_h,
487 (int)current_thread_id());
488 if (osthread == NULL) {
489 return false;
490 }
491
492 // Initial thread state is RUNNABLE
493 osthread->set_state(RUNNABLE);
494
495 thread->set_osthread(osthread);
496 return true;
497 }
498
499 bool os::create_main_thread(JavaThread* thread) {
500 #ifdef ASSERT
501 thread->verify_not_published();
502 #endif
503 if (_starting_thread == NULL) {
504 _starting_thread = create_os_thread(thread, main_thread, main_thread_id);
505 if (_starting_thread == NULL) {
506 return false;
507 }
508 }
509
510 // The primordial thread is runnable from the start)
511 _starting_thread->set_state(RUNNABLE);
512
513 thread->set_osthread(_starting_thread);
514 return true;
515 }
516
517 // Allocate and initialize a new OSThread
518 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
519 unsigned thread_id;
520
521 // Allocate the OSThread object
522 OSThread* osthread = new OSThread(NULL, NULL);
523 if (osthread == NULL) {
524 return false;
525 }
526
527 // Initialize support for Java interrupts
528 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
529 if (interrupt_event == NULL) {
530 delete osthread;
531 return NULL;
532 }
533 osthread->set_interrupt_event(interrupt_event);
534 osthread->set_interrupted(false);
535
536 thread->set_osthread(osthread);
537
538 if (stack_size == 0) {
539 switch (thr_type) {
540 case os::java_thread:
541 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
542 if (JavaThread::stack_size_at_create() > 0)
543 stack_size = JavaThread::stack_size_at_create();
544 break;
545 case os::compiler_thread:
546 if (CompilerThreadStackSize > 0) {
547 stack_size = (size_t)(CompilerThreadStackSize * K);
548 break;
549 } // else fall through:
550 // use VMThreadStackSize if CompilerThreadStackSize is not defined
551 case os::vm_thread:
552 case os::pgc_thread:
553 case os::cgc_thread:
554 case os::watcher_thread:
555 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
556 break;
557 }
558 }
559
560 // Create the Win32 thread
561 //
562 // Contrary to what MSDN document says, "stack_size" in _beginthreadex()
563 // does not specify stack size. Instead, it specifies the size of
564 // initially committed space. The stack size is determined by
565 // PE header in the executable. If the committed "stack_size" is larger
566 // than default value in the PE header, the stack is rounded up to the
567 // nearest multiple of 1MB. For example if the launcher has default
568 // stack size of 320k, specifying any size less than 320k does not
569 // affect the actual stack size at all, it only affects the initial
570 // commitment. On the other hand, specifying 'stack_size' larger than
571 // default value may cause significant increase in memory usage, because
572 // not only the stack space will be rounded up to MB, but also the
573 // entire space is committed upfront.
574 //
575 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION'
576 // for CreateThread() that can treat 'stack_size' as stack size. However we
577 // are not supposed to call CreateThread() directly according to MSDN
578 // document because JVM uses C runtime library. The good news is that the
579 // flag appears to work with _beginthredex() as well.
580
581 #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
582 #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000)
583 #endif
584
585 HANDLE thread_handle =
586 (HANDLE)_beginthreadex(NULL,
587 (unsigned)stack_size,
588 (unsigned (__stdcall *)(void*)) java_start,
589 thread,
590 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION,
591 &thread_id);
592 if (thread_handle == NULL) {
593 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again
594 // without the flag.
595 thread_handle =
596 (HANDLE)_beginthreadex(NULL,
597 (unsigned)stack_size,
598 (unsigned (__stdcall *)(void*)) java_start,
599 thread,
600 CREATE_SUSPENDED,
601 &thread_id);
602 }
603 if (thread_handle == NULL) {
604 // Need to clean up stuff we've allocated so far
605 CloseHandle(osthread->interrupt_event());
606 thread->set_osthread(NULL);
607 delete osthread;
608 return NULL;
609 }
610
611 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count);
612
613 // Store info on the Win32 thread into the OSThread
614 osthread->set_thread_handle(thread_handle);
615 osthread->set_thread_id(thread_id);
616
617 // Initial thread state is INITIALIZED, not SUSPENDED
618 osthread->set_state(INITIALIZED);
619
620 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
621 return true;
622 }
623
624
625 // Free Win32 resources related to the OSThread
626 void os::free_thread(OSThread* osthread) {
627 assert(osthread != NULL, "osthread not set");
628 CloseHandle(osthread->thread_handle());
629 CloseHandle(osthread->interrupt_event());
630 delete osthread;
631 }
632
633
634 static int has_performance_count = 0;
635 static jlong first_filetime;
636 static jlong initial_performance_count;
637 static jlong performance_frequency;
638
639
640 jlong as_long(LARGE_INTEGER x) {
641 jlong result = 0; // initialization to avoid warning
642 set_high(&result, x.HighPart);
643 set_low(&result, x.LowPart);
644 return result;
645 }
646
647
648 jlong os::elapsed_counter() {
649 LARGE_INTEGER count;
650 if (has_performance_count) {
651 QueryPerformanceCounter(&count);
652 return as_long(count) - initial_performance_count;
653 } else {
654 FILETIME wt;
655 GetSystemTimeAsFileTime(&wt);
656 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime);
657 }
658 }
659
660
661 jlong os::elapsed_frequency() {
662 if (has_performance_count) {
663 return performance_frequency;
664 } else {
665 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
666 return 10000000;
667 }
668 }
669
670
671 julong os::available_memory() {
672 return win32::available_memory();
673 }
674
675 julong os::win32::available_memory() {
676 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
677 // value if total memory is larger than 4GB
678 MEMORYSTATUSEX ms;
679 ms.dwLength = sizeof(ms);
680 GlobalMemoryStatusEx(&ms);
681
682 return (julong)ms.ullAvailPhys;
683 }
684
685 julong os::physical_memory() {
686 return win32::physical_memory();
687 }
688
689 julong os::allocatable_physical_memory(julong size) {
690 #ifdef _LP64
691 return size;
692 #else
693 // Limit to 1400m because of the 2gb address space wall
694 return MIN2(size, (julong)1400*M);
695 #endif
696 }
697
698 // VC6 lacks DWORD_PTR
699 #if _MSC_VER < 1300
700 typedef UINT_PTR DWORD_PTR;
701 #endif
702
703 int os::active_processor_count() {
704 DWORD_PTR lpProcessAffinityMask = 0;
705 DWORD_PTR lpSystemAffinityMask = 0;
706 int proc_count = processor_count();
707 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
708 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {
709 // Nof active processors is number of bits in process affinity mask
710 int bitcount = 0;
711 while (lpProcessAffinityMask != 0) {
712 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1);
713 bitcount++;
714 }
715 return bitcount;
716 } else {
717 return proc_count;
718 }
719 }
720
721 void os::set_native_thread_name(const char *name) {
722 // Not yet implemented.
723 return;
724 }
725
726 bool os::distribute_processes(uint length, uint* distribution) {
727 // Not yet implemented.
728 return false;
729 }
730
731 bool os::bind_to_processor(uint processor_id) {
732 // Not yet implemented.
733 return false;
734 }
735
736 static void initialize_performance_counter() {
737 LARGE_INTEGER count;
738 if (QueryPerformanceFrequency(&count)) {
739 has_performance_count = 1;
740 performance_frequency = as_long(count);
741 QueryPerformanceCounter(&count);
742 initial_performance_count = as_long(count);
743 } else {
744 has_performance_count = 0;
745 FILETIME wt;
746 GetSystemTimeAsFileTime(&wt);
747 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
748 }
749 }
750
751
752 double os::elapsedTime() {
753 return (double) elapsed_counter() / (double) elapsed_frequency();
754 }
755
756
757 // Windows format:
758 // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
759 // Java format:
760 // Java standards require the number of milliseconds since 1/1/1970
761
762 // Constant offset - calculated using offset()
763 static jlong _offset = 116444736000000000;
764 // Fake time counter for reproducible results when debugging
765 static jlong fake_time = 0;
766
767 #ifdef ASSERT
768 // Just to be safe, recalculate the offset in debug mode
769 static jlong _calculated_offset = 0;
770 static int _has_calculated_offset = 0;
771
772 jlong offset() {
773 if (_has_calculated_offset) return _calculated_offset;
774 SYSTEMTIME java_origin;
775 java_origin.wYear = 1970;
776 java_origin.wMonth = 1;
777 java_origin.wDayOfWeek = 0; // ignored
778 java_origin.wDay = 1;
779 java_origin.wHour = 0;
780 java_origin.wMinute = 0;
781 java_origin.wSecond = 0;
782 java_origin.wMilliseconds = 0;
783 FILETIME jot;
784 if (!SystemTimeToFileTime(&java_origin, &jot)) {
785 fatal(err_msg("Error = %d\nWindows error", GetLastError()));
786 }
787 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime);
788 _has_calculated_offset = 1;
789 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal");
790 return _calculated_offset;
791 }
792 #else
793 jlong offset() {
794 return _offset;
795 }
796 #endif
797
798 jlong windows_to_java_time(FILETIME wt) {
799 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
800 return (a - offset()) / 10000;
801 }
802
803 FILETIME java_to_windows_time(jlong l) {
804 jlong a = (l * 10000) + offset();
805 FILETIME result;
806 result.dwHighDateTime = high(a);
807 result.dwLowDateTime = low(a);
808 return result;
809 }
810
811 // For now, we say that Windows does not support vtime. I have no idea
812 // whether it can actually be made to (DLD, 9/13/05).
813
814 bool os::supports_vtime() { return false; }
815 bool os::enable_vtime() { return false; }
816 bool os::vtime_enabled() { return false; }
817 double os::elapsedVTime() {
818 // better than nothing, but not much
819 return elapsedTime();
820 }
821
822 jlong os::javaTimeMillis() {
823 if (UseFakeTimers) {
824 return fake_time++;
825 } else {
826 FILETIME wt;
827 GetSystemTimeAsFileTime(&wt);
828 return windows_to_java_time(wt);
829 }
830 }
831
832 jlong os::javaTimeNanos() {
833 if (!has_performance_count) {
834 return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do.
835 } else {
836 LARGE_INTEGER current_count;
837 QueryPerformanceCounter(¤t_count);
838 double current = as_long(current_count);
839 double freq = performance_frequency;
840 jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC);
841 return time;
842 }
843 }
844
845 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
846 if (!has_performance_count) {
847 // javaTimeMillis() doesn't have much percision,
848 // but it is not going to wrap -- so all 64 bits
849 info_ptr->max_value = ALL_64_BITS;
850
851 // this is a wall clock timer, so may skip
852 info_ptr->may_skip_backward = true;
853 info_ptr->may_skip_forward = true;
854 } else {
855 jlong freq = performance_frequency;
856 if (freq < NANOSECS_PER_SEC) {
857 // the performance counter is 64 bits and we will
858 // be multiplying it -- so no wrap in 64 bits
859 info_ptr->max_value = ALL_64_BITS;
860 } else if (freq > NANOSECS_PER_SEC) {
861 // use the max value the counter can reach to
862 // determine the max value which could be returned
863 julong max_counter = (julong)ALL_64_BITS;
864 info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC));
865 } else {
866 // the performance counter is 64 bits and we will
867 // be using it directly -- so no wrap in 64 bits
868 info_ptr->max_value = ALL_64_BITS;
869 }
870
871 // using a counter, so no skipping
872 info_ptr->may_skip_backward = false;
873 info_ptr->may_skip_forward = false;
874 }
875 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
876 }
877
878 char* os::local_time_string(char *buf, size_t buflen) {
879 SYSTEMTIME st;
880 GetLocalTime(&st);
881 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
882 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
883 return buf;
884 }
885
886 bool os::getTimesSecs(double* process_real_time,
887 double* process_user_time,
888 double* process_system_time) {
889 HANDLE h_process = GetCurrentProcess();
890 FILETIME create_time, exit_time, kernel_time, user_time;
891 BOOL result = GetProcessTimes(h_process,
892 &create_time,
893 &exit_time,
894 &kernel_time,
895 &user_time);
896 if (result != 0) {
897 FILETIME wt;
898 GetSystemTimeAsFileTime(&wt);
899 jlong rtc_millis = windows_to_java_time(wt);
900 jlong user_millis = windows_to_java_time(user_time);
901 jlong system_millis = windows_to_java_time(kernel_time);
902 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS);
903 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS);
904 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS);
905 return true;
906 } else {
907 return false;
908 }
909 }
910
911 void os::shutdown() {
912
913 // allow PerfMemory to attempt cleanup of any persistent resources
914 perfMemory_exit();
915
916 // flush buffered output, finish log files
917 ostream_abort();
918
919 // Check for abort hook
920 abort_hook_t abort_hook = Arguments::abort_hook();
921 if (abort_hook != NULL) {
922 abort_hook();
923 }
924 }
925
926
927 static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
928 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION);
929
930 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
931 HINSTANCE dbghelp;
932 EXCEPTION_POINTERS ep;
933 MINIDUMP_EXCEPTION_INFORMATION mei;
934 MINIDUMP_EXCEPTION_INFORMATION* pmei;
935
936 HANDLE hProcess = GetCurrentProcess();
937 DWORD processId = GetCurrentProcessId();
938 HANDLE dumpFile;
939 MINIDUMP_TYPE dumpType;
940 static const char* cwd;
941
942 // If running on a client version of Windows and user has not explicitly enabled dumping
943 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) {
944 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false);
945 return;
946 // If running on a server version of Windows and user has explictly disabled dumping
947 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) {
948 VMError::report_coredump_status("Minidump has been disabled from the command line", false);
949 return;
950 }
951
952 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0);
953
954 if (dbghelp == NULL) {
955 VMError::report_coredump_status("Failed to load dbghelp.dll", false);
956 return;
957 }
958
959 _MiniDumpWriteDump = CAST_TO_FN_PTR(
960 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
961 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION),
962 GetProcAddress(dbghelp, "MiniDumpWriteDump"));
963
964 if (_MiniDumpWriteDump == NULL) {
965 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false);
966 return;
967 }
968
969 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData);
970
971 // Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with
972 // API_VERSION_NUMBER 11 or higher contains the ones we want though
973 #if API_VERSION_NUMBER >= 11
974 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo |
975 MiniDumpWithUnloadedModules);
976 #endif
977
978 cwd = get_current_directory(NULL, 0);
979 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id());
980 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
981
982 if (dumpFile == INVALID_HANDLE_VALUE) {
983 VMError::report_coredump_status("Failed to create file for dumping", false);
984 return;
985 }
986 if (exceptionRecord != NULL && contextRecord != NULL) {
987 ep.ContextRecord = (PCONTEXT) contextRecord;
988 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord;
989
990 mei.ThreadId = GetCurrentThreadId();
991 mei.ExceptionPointers = &ep;
992 pmei = &mei;
993 } else {
994 pmei = NULL;
995 }
996
997
998 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all
999 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then.
1000 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false &&
1001 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) {
1002 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false);
1003 } else {
1004 VMError::report_coredump_status(buffer, true);
1005 }
1006
1007 CloseHandle(dumpFile);
1008 }
1009
1010
1011
1012 void os::abort(bool dump_core)
1013 {
1014 os::shutdown();
1015 // no core dump on Windows
1016 ::exit(1);
1017 }
1018
1019 // Die immediately, no exit hook, no abort hook, no cleanup.
1020 void os::die() {
1021 _exit(-1);
1022 }
1023
1024 // Directory routines copied from src/win32/native/java/io/dirent_md.c
1025 // * dirent_md.c 1.15 00/02/02
1026 //
1027 // The declarations for DIR and struct dirent are in jvm_win32.h.
1028
1029 /* Caller must have already run dirname through JVM_NativePath, which removes
1030 duplicate slashes and converts all instances of '/' into '\\'. */
1031
1032 DIR *
1033 os::opendir(const char *dirname)
1034 {
1035 assert(dirname != NULL, "just checking"); // hotspot change
1036 DIR *dirp = (DIR *)malloc(sizeof(DIR), mtInternal);
1037 DWORD fattr; // hotspot change
1038 char alt_dirname[4] = { 0, 0, 0, 0 };
1039
1040 if (dirp == 0) {
1041 errno = ENOMEM;
1042 return 0;
1043 }
1044
1045 /*
1046 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it
1047 * as a directory in FindFirstFile(). We detect this case here and
1048 * prepend the current drive name.
1049 */
1050 if (dirname[1] == '\0' && dirname[0] == '\\') {
1051 alt_dirname[0] = _getdrive() + 'A' - 1;
1052 alt_dirname[1] = ':';
1053 alt_dirname[2] = '\\';
1054 alt_dirname[3] = '\0';
1055 dirname = alt_dirname;
1056 }
1057
1058 dirp->path = (char *)malloc(strlen(dirname) + 5, mtInternal);
1059 if (dirp->path == 0) {
1060 free(dirp, mtInternal);
1061 errno = ENOMEM;
1062 return 0;
1063 }
1064 strcpy(dirp->path, dirname);
1065
1066 fattr = GetFileAttributes(dirp->path);
1067 if (fattr == 0xffffffff) {
1068 free(dirp->path, mtInternal);
1069 free(dirp, mtInternal);
1070 errno = ENOENT;
1071 return 0;
1072 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
1073 free(dirp->path, mtInternal);
1074 free(dirp, mtInternal);
1075 errno = ENOTDIR;
1076 return 0;
1077 }
1078
1079 /* Append "*.*", or possibly "\\*.*", to path */
1080 if (dirp->path[1] == ':'
1081 && (dirp->path[2] == '\0'
1082 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) {
1083 /* No '\\' needed for cases like "Z:" or "Z:\" */
1084 strcat(dirp->path, "*.*");
1085 } else {
1086 strcat(dirp->path, "\\*.*");
1087 }
1088
1089 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data);
1090 if (dirp->handle == INVALID_HANDLE_VALUE) {
1091 if (GetLastError() != ERROR_FILE_NOT_FOUND) {
1092 free(dirp->path, mtInternal);
1093 free(dirp, mtInternal);
1094 errno = EACCES;
1095 return 0;
1096 }
1097 }
1098 return dirp;
1099 }
1100
1101 /* parameter dbuf unused on Windows */
1102
1103 struct dirent *
1104 os::readdir(DIR *dirp, dirent *dbuf)
1105 {
1106 assert(dirp != NULL, "just checking"); // hotspot change
1107 if (dirp->handle == INVALID_HANDLE_VALUE) {
1108 return 0;
1109 }
1110
1111 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName);
1112
1113 if (!FindNextFile(dirp->handle, &dirp->find_data)) {
1114 if (GetLastError() == ERROR_INVALID_HANDLE) {
1115 errno = EBADF;
1116 return 0;
1117 }
1118 FindClose(dirp->handle);
1119 dirp->handle = INVALID_HANDLE_VALUE;
1120 }
1121
1122 return &dirp->dirent;
1123 }
1124
1125 int
1126 os::closedir(DIR *dirp)
1127 {
1128 assert(dirp != NULL, "just checking"); // hotspot change
1129 if (dirp->handle != INVALID_HANDLE_VALUE) {
1130 if (!FindClose(dirp->handle)) {
1131 errno = EBADF;
1132 return -1;
1133 }
1134 dirp->handle = INVALID_HANDLE_VALUE;
1135 }
1136 free(dirp->path, mtInternal);
1137 free(dirp, mtInternal);
1138 return 0;
1139 }
1140
1141 // This must be hard coded because it's the system's temporary
1142 // directory not the java application's temp directory, ala java.io.tmpdir.
1143 const char* os::get_temp_directory() {
1144 static char path_buf[MAX_PATH];
1145 if (GetTempPath(MAX_PATH, path_buf)>0)
1146 return path_buf;
1147 else{
1148 path_buf[0]='\0';
1149 return path_buf;
1150 }
1151 }
1152
1153 static bool file_exists(const char* filename) {
1154 if (filename == NULL || strlen(filename) == 0) {
1155 return false;
1156 }
1157 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES;
1158 }
1159
1160 bool os::dll_build_name(char *buffer, size_t buflen,
1161 const char* pname, const char* fname) {
1162 bool retval = false;
1163 const size_t pnamelen = pname ? strlen(pname) : 0;
1164 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0;
1165
1166 // Return error on buffer overflow.
1167 if (pnamelen + strlen(fname) + 10 > buflen) {
1168 return retval;
1169 }
1170
1171 if (pnamelen == 0) {
1172 jio_snprintf(buffer, buflen, "%s.dll", fname);
1173 retval = true;
1174 } else if (c == ':' || c == '\\') {
1175 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname);
1176 retval = true;
1177 } else if (strchr(pname, *os::path_separator()) != NULL) {
1178 int n;
1179 char** pelements = split_path(pname, &n);
1180 for (int i = 0 ; i < n ; i++) {
1181 char* path = pelements[i];
1182 // Really shouldn't be NULL, but check can't hurt
1183 size_t plen = (path == NULL) ? 0 : strlen(path);
1184 if (plen == 0) {
1185 continue; // skip the empty path values
1186 }
1187 const char lastchar = path[plen - 1];
1188 if (lastchar == ':' || lastchar == '\\') {
1189 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname);
1190 } else {
1191 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname);
1192 }
1193 if (file_exists(buffer)) {
1194 retval = true;
1195 break;
1196 }
1197 }
1198 // release the storage
1199 for (int i = 0 ; i < n ; i++) {
1200 if (pelements[i] != NULL) {
1201 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1202 }
1203 }
1204 if (pelements != NULL) {
1205 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1206 }
1207 } else {
1208 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname);
1209 retval = true;
1210 }
1211 return retval;
1212 }
1213
1214 // Needs to be in os specific directory because windows requires another
1215 // header file <direct.h>
1216 const char* os::get_current_directory(char *buf, int buflen) {
1217 return _getcwd(buf, buflen);
1218 }
1219
1220 //-----------------------------------------------------------
1221 // Helper functions for fatal error handler
1222 #ifdef _WIN64
1223 // Helper routine which returns true if address in
1224 // within the NTDLL address space.
1225 //
1226 static bool _addr_in_ntdll( address addr )
1227 {
1228 HMODULE hmod;
1229 MODULEINFO minfo;
1230
1231 hmod = GetModuleHandle("NTDLL.DLL");
1232 if ( hmod == NULL ) return false;
1233 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod,
1234 &minfo, sizeof(MODULEINFO)) )
1235 return false;
1236
1237 if ( (addr >= minfo.lpBaseOfDll) &&
1238 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage)))
1239 return true;
1240 else
1241 return false;
1242 }
1243 #endif
1244
1245
1246 // Enumerate all modules for a given process ID
1247 //
1248 // Notice that Windows 95/98/Me and Windows NT/2000/XP have
1249 // different API for doing this. We use PSAPI.DLL on NT based
1250 // Windows and ToolHelp on 95/98/Me.
1251
1252 // Callback function that is called by enumerate_modules() on
1253 // every DLL module.
1254 // Input parameters:
1255 // int pid,
1256 // char* module_file_name,
1257 // address module_base_addr,
1258 // unsigned module_size,
1259 // void* param
1260 typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *);
1261
1262 // enumerate_modules for Windows NT, using PSAPI
1263 static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param)
1264 {
1265 HANDLE hProcess ;
1266
1267 # define MAX_NUM_MODULES 128
1268 HMODULE modules[MAX_NUM_MODULES];
1269 static char filename[ MAX_PATH ];
1270 int result = 0;
1271
1272 if (!os::PSApiDll::PSApiAvailable()) {
1273 return 0;
1274 }
1275
1276 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
1277 FALSE, pid ) ;
1278 if (hProcess == NULL) return 0;
1279
1280 DWORD size_needed;
1281 if (!os::PSApiDll::EnumProcessModules(hProcess, modules,
1282 sizeof(modules), &size_needed)) {
1283 CloseHandle( hProcess );
1284 return 0;
1285 }
1286
1287 // number of modules that are currently loaded
1288 int num_modules = size_needed / sizeof(HMODULE);
1289
1290 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) {
1291 // Get Full pathname:
1292 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i],
1293 filename, sizeof(filename))) {
1294 filename[0] = '\0';
1295 }
1296
1297 MODULEINFO modinfo;
1298 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i],
1299 &modinfo, sizeof(modinfo))) {
1300 modinfo.lpBaseOfDll = NULL;
1301 modinfo.SizeOfImage = 0;
1302 }
1303
1304 // Invoke callback function
1305 result = func(pid, filename, (address)modinfo.lpBaseOfDll,
1306 modinfo.SizeOfImage, param);
1307 if (result) break;
1308 }
1309
1310 CloseHandle( hProcess ) ;
1311 return result;
1312 }
1313
1314
1315 // enumerate_modules for Windows 95/98/ME, using TOOLHELP
1316 static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param)
1317 {
1318 HANDLE hSnapShot ;
1319 static MODULEENTRY32 modentry ;
1320 int result = 0;
1321
1322 if (!os::Kernel32Dll::HelpToolsAvailable()) {
1323 return 0;
1324 }
1325
1326 // Get a handle to a Toolhelp snapshot of the system
1327 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ;
1328 if( hSnapShot == INVALID_HANDLE_VALUE ) {
1329 return FALSE ;
1330 }
1331
1332 // iterate through all modules
1333 modentry.dwSize = sizeof(MODULEENTRY32) ;
1334 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0;
1335
1336 while( not_done ) {
1337 // invoke the callback
1338 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr,
1339 modentry.modBaseSize, param);
1340 if (result) break;
1341
1342 modentry.dwSize = sizeof(MODULEENTRY32) ;
1343 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0;
1344 }
1345
1346 CloseHandle(hSnapShot);
1347 return result;
1348 }
1349
1350 int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param )
1351 {
1352 // Get current process ID if caller doesn't provide it.
1353 if (!pid) pid = os::current_process_id();
1354
1355 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param);
1356 else return _enumerate_modules_windows(pid, func, param);
1357 }
1358
1359 struct _modinfo {
1360 address addr;
1361 char* full_path; // point to a char buffer
1362 int buflen; // size of the buffer
1363 address base_addr;
1364 };
1365
1366 static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr,
1367 unsigned size, void * param) {
1368 struct _modinfo *pmod = (struct _modinfo *)param;
1369 if (!pmod) return -1;
1370
1371 if (base_addr <= pmod->addr &&
1372 base_addr+size > pmod->addr) {
1373 // if a buffer is provided, copy path name to the buffer
1374 if (pmod->full_path) {
1375 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname);
1376 }
1377 pmod->base_addr = base_addr;
1378 return 1;
1379 }
1380 return 0;
1381 }
1382
1383 bool os::dll_address_to_library_name(address addr, char* buf,
1384 int buflen, int* offset) {
1385 // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
1386 // return the full path to the DLL file, sometimes it returns path
1387 // to the corresponding PDB file (debug info); sometimes it only
1388 // returns partial path, which makes life painful.
1389
1390 struct _modinfo mi;
1391 mi.addr = addr;
1392 mi.full_path = buf;
1393 mi.buflen = buflen;
1394 int pid = os::current_process_id();
1395 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
1396 // buf already contains path name
1397 if (offset) *offset = addr - mi.base_addr;
1398 return true;
1399 } else {
1400 if (buf) buf[0] = '\0';
1401 if (offset) *offset = -1;
1402 return false;
1403 }
1404 }
1405
1406 bool os::dll_address_to_function_name(address addr, char *buf,
1407 int buflen, int *offset) {
1408 if (Decoder::decode(addr, buf, buflen, offset)) {
1409 return true;
1410 }
1411 if (offset != NULL) *offset = -1;
1412 if (buf != NULL) buf[0] = '\0';
1413 return false;
1414 }
1415
1416 // save the start and end address of jvm.dll into param[0] and param[1]
1417 static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr,
1418 unsigned size, void * param) {
1419 if (!param) return -1;
1420
1421 if (base_addr <= (address)_locate_jvm_dll &&
1422 base_addr+size > (address)_locate_jvm_dll) {
1423 ((address*)param)[0] = base_addr;
1424 ((address*)param)[1] = base_addr + size;
1425 return 1;
1426 }
1427 return 0;
1428 }
1429
1430 address vm_lib_location[2]; // start and end address of jvm.dll
1431
1432 // check if addr is inside jvm.dll
1433 bool os::address_is_in_vm(address addr) {
1434 if (!vm_lib_location[0] || !vm_lib_location[1]) {
1435 int pid = os::current_process_id();
1436 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) {
1437 assert(false, "Can't find jvm module.");
1438 return false;
1439 }
1440 }
1441
1442 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]);
1443 }
1444
1445 // print module info; param is outputStream*
1446 static int _print_module(int pid, char* fname, address base,
1447 unsigned size, void* param) {
1448 if (!param) return -1;
1449
1450 outputStream* st = (outputStream*)param;
1451
1452 address end_addr = base + size;
1453 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname);
1454 return 0;
1455 }
1456
1457 // Loads .dll/.so and
1458 // in case of error it checks if .dll/.so was built for the
1459 // same architecture as Hotspot is running on
1460 void * os::dll_load(const char *name, char *ebuf, int ebuflen)
1461 {
1462 void * result = LoadLibrary(name);
1463 if (result != NULL)
1464 {
1465 return result;
1466 }
1467
1468 DWORD errcode = GetLastError();
1469 if (errcode == ERROR_MOD_NOT_FOUND) {
1470 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
1471 ebuf[ebuflen-1]='\0';
1472 return NULL;
1473 }
1474
1475 // Parsing dll below
1476 // If we can read dll-info and find that dll was built
1477 // for an architecture other than Hotspot is running in
1478 // - then print to buffer "DLL was built for a different architecture"
1479 // else call os::lasterror to obtain system error message
1480
1481 // Read system error message into ebuf
1482 // It may or may not be overwritten below (in the for loop and just above)
1483 lasterror(ebuf, (size_t) ebuflen);
1484 ebuf[ebuflen-1]='\0';
1485 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0);
1486 if (file_descriptor<0)
1487 {
1488 return NULL;
1489 }
1490
1491 uint32_t signature_offset;
1492 uint16_t lib_arch=0;
1493 bool failed_to_get_lib_arch=
1494 (
1495 //Go to position 3c in the dll
1496 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0)
1497 ||
1498 // Read loacation of signature
1499 (sizeof(signature_offset)!=
1500 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset))))
1501 ||
1502 //Go to COFF File Header in dll
1503 //that is located after"signature" (4 bytes long)
1504 (os::seek_to_file_offset(file_descriptor,
1505 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0)
1506 ||
1507 //Read field that contains code of architecture
1508 // that dll was build for
1509 (sizeof(lib_arch)!=
1510 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch))))
1511 );
1512
1513 ::close(file_descriptor);
1514 if (failed_to_get_lib_arch)
1515 {
1516 // file i/o error - report os::lasterror(...) msg
1517 return NULL;
1518 }
1519
1520 typedef struct
1521 {
1522 uint16_t arch_code;
1523 char* arch_name;
1524 } arch_t;
1525
1526 static const arch_t arch_array[]={
1527 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"},
1528 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"},
1529 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"}
1530 };
1531 #if (defined _M_IA64)
1532 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64;
1533 #elif (defined _M_AMD64)
1534 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64;
1535 #elif (defined _M_IX86)
1536 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386;
1537 #else
1538 #error Method os::dll_load requires that one of following \
1539 is defined :_M_IA64,_M_AMD64 or _M_IX86
1540 #endif
1541
1542
1543 // Obtain a string for printf operation
1544 // lib_arch_str shall contain string what platform this .dll was built for
1545 // running_arch_str shall string contain what platform Hotspot was built for
1546 char *running_arch_str=NULL,*lib_arch_str=NULL;
1547 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++)
1548 {
1549 if (lib_arch==arch_array[i].arch_code)
1550 lib_arch_str=arch_array[i].arch_name;
1551 if (running_arch==arch_array[i].arch_code)
1552 running_arch_str=arch_array[i].arch_name;
1553 }
1554
1555 assert(running_arch_str,
1556 "Didn't find runing architecture code in arch_array");
1557
1558 // If the architure is right
1559 // but some other error took place - report os::lasterror(...) msg
1560 if (lib_arch == running_arch)
1561 {
1562 return NULL;
1563 }
1564
1565 if (lib_arch_str!=NULL)
1566 {
1567 ::_snprintf(ebuf, ebuflen-1,
1568 "Can't load %s-bit .dll on a %s-bit platform",
1569 lib_arch_str,running_arch_str);
1570 }
1571 else
1572 {
1573 // don't know what architecture this dll was build for
1574 ::_snprintf(ebuf, ebuflen-1,
1575 "Can't load this .dll (machine code=0x%x) on a %s-bit platform",
1576 lib_arch,running_arch_str);
1577 }
1578
1579 return NULL;
1580 }
1581
1582
1583 void os::print_dll_info(outputStream *st) {
1584 int pid = os::current_process_id();
1585 st->print_cr("Dynamic libraries:");
1586 enumerate_modules(pid, _print_module, (void *)st);
1587 }
1588
1589 void os::print_os_info_brief(outputStream* st) {
1590 os::print_os_info(st);
1591 }
1592
1593 void os::print_os_info(outputStream* st) {
1594 st->print("OS:");
1595
1596 os::win32::print_windows_version(st);
1597 }
1598
1599 void os::win32::print_windows_version(outputStream* st) {
1600 OSVERSIONINFOEX osvi;
1601 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
1602 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
1603
1604 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) {
1605 st->print_cr("N/A");
1606 return;
1607 }
1608
1609 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
1610 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
1611 switch (os_vers) {
1612 case 3051: st->print(" Windows NT 3.51"); break;
1613 case 4000: st->print(" Windows NT 4.0"); break;
1614 case 5000: st->print(" Windows 2000"); break;
1615 case 5001: st->print(" Windows XP"); break;
1616 case 5002:
1617 case 6000:
1618 case 6001:
1619 case 6002: {
1620 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
1621 // find out whether we are running on 64 bit processor or not.
1622 SYSTEM_INFO si;
1623 ZeroMemory(&si, sizeof(SYSTEM_INFO));
1624 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){
1625 GetSystemInfo(&si);
1626 } else {
1627 os::Kernel32Dll::GetNativeSystemInfo(&si);
1628 }
1629 if (os_vers == 5002) {
1630 if (osvi.wProductType == VER_NT_WORKSTATION &&
1631 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1632 st->print(" Windows XP x64 Edition");
1633 else
1634 st->print(" Windows Server 2003 family");
1635 } else if (os_vers == 6000) {
1636 if (osvi.wProductType == VER_NT_WORKSTATION)
1637 st->print(" Windows Vista");
1638 else
1639 st->print(" Windows Server 2008");
1640 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1641 st->print(" , 64 bit");
1642 } else if (os_vers == 6001) {
1643 if (osvi.wProductType == VER_NT_WORKSTATION) {
1644 st->print(" Windows 7");
1645 } else {
1646 // Unrecognized windows, print out its major and minor versions
1647 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1648 }
1649 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1650 st->print(" , 64 bit");
1651 } else if (os_vers == 6002) {
1652 if (osvi.wProductType == VER_NT_WORKSTATION) {
1653 st->print(" Windows 8");
1654 } else {
1655 st->print(" Windows Server 2012");
1656 }
1657 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1658 st->print(" , 64 bit");
1659 } else { // future os
1660 // Unrecognized windows, print out its major and minor versions
1661 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1662 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1663 st->print(" , 64 bit");
1664 }
1665 break;
1666 }
1667 default: // future windows, print out its major and minor versions
1668 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1669 }
1670 } else {
1671 switch (os_vers) {
1672 case 4000: st->print(" Windows 95"); break;
1673 case 4010: st->print(" Windows 98"); break;
1674 case 4090: st->print(" Windows Me"); break;
1675 default: // future windows, print out its major and minor versions
1676 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1677 }
1678 }
1679 st->print(" Build %d", osvi.dwBuildNumber);
1680 st->print(" %s", osvi.szCSDVersion); // service pack
1681 st->cr();
1682 }
1683
1684 void os::pd_print_cpu_info(outputStream* st) {
1685 // Nothing to do for now.
1686 }
1687
1688 void os::print_memory_info(outputStream* st) {
1689 st->print("Memory:");
1690 st->print(" %dk page", os::vm_page_size()>>10);
1691
1692 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
1693 // value if total memory is larger than 4GB
1694 MEMORYSTATUSEX ms;
1695 ms.dwLength = sizeof(ms);
1696 GlobalMemoryStatusEx(&ms);
1697
1698 st->print(", physical %uk", os::physical_memory() >> 10);
1699 st->print("(%uk free)", os::available_memory() >> 10);
1700
1701 st->print(", swap %uk", ms.ullTotalPageFile >> 10);
1702 st->print("(%uk free)", ms.ullAvailPageFile >> 10);
1703 st->cr();
1704 }
1705
1706 void os::print_siginfo(outputStream *st, void *siginfo) {
1707 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo;
1708 st->print("siginfo:");
1709 st->print(" ExceptionCode=0x%x", er->ExceptionCode);
1710
1711 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
1712 er->NumberParameters >= 2) {
1713 switch (er->ExceptionInformation[0]) {
1714 case 0: st->print(", reading address"); break;
1715 case 1: st->print(", writing address"); break;
1716 default: st->print(", ExceptionInformation=" INTPTR_FORMAT,
1717 er->ExceptionInformation[0]);
1718 }
1719 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]);
1720 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR &&
1721 er->NumberParameters >= 2 && UseSharedSpaces) {
1722 FileMapInfo* mapinfo = FileMapInfo::current_info();
1723 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) {
1724 st->print("\n\nError accessing class data sharing archive." \
1725 " Mapped file inaccessible during execution, " \
1726 " possible disk/network problem.");
1727 }
1728 } else {
1729 int num = er->NumberParameters;
1730 if (num > 0) {
1731 st->print(", ExceptionInformation=");
1732 for (int i = 0; i < num; i++) {
1733 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]);
1734 }
1735 }
1736 }
1737 st->cr();
1738 }
1739
1740 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
1741 // do nothing
1742 }
1743
1744 static char saved_jvm_path[MAX_PATH] = {0};
1745
1746 // Find the full path to the current module, jvm.dll
1747 void os::jvm_path(char *buf, jint buflen) {
1748 // Error checking.
1749 if (buflen < MAX_PATH) {
1750 assert(false, "must use a large-enough buffer");
1751 buf[0] = '\0';
1752 return;
1753 }
1754 // Lazy resolve the path to current module.
1755 if (saved_jvm_path[0] != 0) {
1756 strcpy(buf, saved_jvm_path);
1757 return;
1758 }
1759
1760 buf[0] = '\0';
1761 if (Arguments::created_by_gamma_launcher()) {
1762 // Support for the gamma launcher. Check for an
1763 // JAVA_HOME environment variable
1764 // and fix up the path so it looks like
1765 // libjvm.so is installed there (append a fake suffix
1766 // hotspot/libjvm.so).
1767 char* java_home_var = ::getenv("JAVA_HOME");
1768 if (java_home_var != NULL && java_home_var[0] != 0) {
1769
1770 strncpy(buf, java_home_var, buflen);
1771
1772 // determine if this is a legacy image or modules image
1773 // modules image doesn't have "jre" subdirectory
1774 size_t len = strlen(buf);
1775 char* jrebin_p = buf + len;
1776 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\");
1777 if (0 != _access(buf, 0)) {
1778 jio_snprintf(jrebin_p, buflen-len, "\\bin\\");
1779 }
1780 len = strlen(buf);
1781 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll");
1782 }
1783 }
1784
1785 if(buf[0] == '\0') {
1786 GetModuleFileName(vm_lib_handle, buf, buflen);
1787 }
1788 strcpy(saved_jvm_path, buf);
1789 }
1790
1791
1792 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
1793 #ifndef _WIN64
1794 st->print("_");
1795 #endif
1796 }
1797
1798
1799 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
1800 #ifndef _WIN64
1801 st->print("@%d", args_size * sizeof(int));
1802 #endif
1803 }
1804
1805 // This method is a copy of JDK's sysGetLastErrorString
1806 // from src/windows/hpi/src/system_md.c
1807
1808 size_t os::lasterror(char* buf, size_t len) {
1809 DWORD errval;
1810
1811 if ((errval = GetLastError()) != 0) {
1812 // DOS error
1813 size_t n = (size_t)FormatMessage(
1814 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
1815 NULL,
1816 errval,
1817 0,
1818 buf,
1819 (DWORD)len,
1820 NULL);
1821 if (n > 3) {
1822 // Drop final '.', CR, LF
1823 if (buf[n - 1] == '\n') n--;
1824 if (buf[n - 1] == '\r') n--;
1825 if (buf[n - 1] == '.') n--;
1826 buf[n] = '\0';
1827 }
1828 return n;
1829 }
1830
1831 if (errno != 0) {
1832 // C runtime error that has no corresponding DOS error code
1833 const char* s = strerror(errno);
1834 size_t n = strlen(s);
1835 if (n >= len) n = len - 1;
1836 strncpy(buf, s, n);
1837 buf[n] = '\0';
1838 return n;
1839 }
1840
1841 return 0;
1842 }
1843
1844 int os::get_last_error() {
1845 DWORD error = GetLastError();
1846 if (error == 0)
1847 error = errno;
1848 return (int)error;
1849 }
1850
1851 // sun.misc.Signal
1852 // NOTE that this is a workaround for an apparent kernel bug where if
1853 // a signal handler for SIGBREAK is installed then that signal handler
1854 // takes priority over the console control handler for CTRL_CLOSE_EVENT.
1855 // See bug 4416763.
1856 static void (*sigbreakHandler)(int) = NULL;
1857
1858 static void UserHandler(int sig, void *siginfo, void *context) {
1859 os::signal_notify(sig);
1860 // We need to reinstate the signal handler each time...
1861 os::signal(sig, (void*)UserHandler);
1862 }
1863
1864 void* os::user_handler() {
1865 return (void*) UserHandler;
1866 }
1867
1868 void* os::signal(int signal_number, void* handler) {
1869 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) {
1870 void (*oldHandler)(int) = sigbreakHandler;
1871 sigbreakHandler = (void (*)(int)) handler;
1872 return (void*) oldHandler;
1873 } else {
1874 return (void*)::signal(signal_number, (void (*)(int))handler);
1875 }
1876 }
1877
1878 void os::signal_raise(int signal_number) {
1879 raise(signal_number);
1880 }
1881
1882 // The Win32 C runtime library maps all console control events other than ^C
1883 // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close,
1884 // logoff, and shutdown events. We therefore install our own console handler
1885 // that raises SIGTERM for the latter cases.
1886 //
1887 static BOOL WINAPI consoleHandler(DWORD event) {
1888 switch(event) {
1889 case CTRL_C_EVENT:
1890 if (is_error_reported()) {
1891 // Ctrl-C is pressed during error reporting, likely because the error
1892 // handler fails to abort. Let VM die immediately.
1893 os::die();
1894 }
1895
1896 os::signal_raise(SIGINT);
1897 return TRUE;
1898 break;
1899 case CTRL_BREAK_EVENT:
1900 if (sigbreakHandler != NULL) {
1901 (*sigbreakHandler)(SIGBREAK);
1902 }
1903 return TRUE;
1904 break;
1905 case CTRL_LOGOFF_EVENT: {
1906 // Don't terminate JVM if it is running in a non-interactive session,
1907 // such as a service process.
1908 USEROBJECTFLAGS flags;
1909 HANDLE handle = GetProcessWindowStation();
1910 if (handle != NULL &&
1911 GetUserObjectInformation(handle, UOI_FLAGS, &flags,
1912 sizeof( USEROBJECTFLAGS), NULL)) {
1913 // If it is a non-interactive session, let next handler to deal
1914 // with it.
1915 if ((flags.dwFlags & WSF_VISIBLE) == 0) {
1916 return FALSE;
1917 }
1918 }
1919 }
1920 case CTRL_CLOSE_EVENT:
1921 case CTRL_SHUTDOWN_EVENT:
1922 os::signal_raise(SIGTERM);
1923 return TRUE;
1924 break;
1925 default:
1926 break;
1927 }
1928 return FALSE;
1929 }
1930
1931 /*
1932 * The following code is moved from os.cpp for making this
1933 * code platform specific, which it is by its very nature.
1934 */
1935
1936 // Return maximum OS signal used + 1 for internal use only
1937 // Used as exit signal for signal_thread
1938 int os::sigexitnum_pd(){
1939 return NSIG;
1940 }
1941
1942 // a counter for each possible signal value, including signal_thread exit signal
1943 static volatile jint pending_signals[NSIG+1] = { 0 };
1944 static HANDLE sig_sem = NULL;
1945
1946 void os::signal_init_pd() {
1947 // Initialize signal structures
1948 memset((void*)pending_signals, 0, sizeof(pending_signals));
1949
1950 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL);
1951
1952 // Programs embedding the VM do not want it to attempt to receive
1953 // events like CTRL_LOGOFF_EVENT, which are used to implement the
1954 // shutdown hooks mechanism introduced in 1.3. For example, when
1955 // the VM is run as part of a Windows NT service (i.e., a servlet
1956 // engine in a web server), the correct behavior is for any console
1957 // control handler to return FALSE, not TRUE, because the OS's
1958 // "final" handler for such events allows the process to continue if
1959 // it is a service (while terminating it if it is not a service).
1960 // To make this behavior uniform and the mechanism simpler, we
1961 // completely disable the VM's usage of these console events if -Xrs
1962 // (=ReduceSignalUsage) is specified. This means, for example, that
1963 // the CTRL-BREAK thread dump mechanism is also disabled in this
1964 // case. See bugs 4323062, 4345157, and related bugs.
1965
1966 if (!ReduceSignalUsage) {
1967 // Add a CTRL-C handler
1968 SetConsoleCtrlHandler(consoleHandler, TRUE);
1969 }
1970 }
1971
1972 void os::signal_notify(int signal_number) {
1973 BOOL ret;
1974 if (sig_sem != NULL) {
1975 Atomic::inc(&pending_signals[signal_number]);
1976 ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
1977 assert(ret != 0, "ReleaseSemaphore() failed");
1978 }
1979 }
1980
1981 static int check_pending_signals(bool wait_for_signal) {
1982 DWORD ret;
1983 while (true) {
1984 for (int i = 0; i < NSIG + 1; i++) {
1985 jint n = pending_signals[i];
1986 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
1987 return i;
1988 }
1989 }
1990 if (!wait_for_signal) {
1991 return -1;
1992 }
1993
1994 JavaThread *thread = JavaThread::current();
1995
1996 ThreadBlockInVM tbivm(thread);
1997
1998 bool threadIsSuspended;
1999 do {
2000 thread->set_suspend_equivalent();
2001 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
2002 ret = ::WaitForSingleObject(sig_sem, INFINITE);
2003 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed");
2004
2005 // were we externally suspended while we were waiting?
2006 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
2007 if (threadIsSuspended) {
2008 //
2009 // The semaphore has been incremented, but while we were waiting
2010 // another thread suspended us. We don't want to continue running
2011 // while suspended because that would surprise the thread that
2012 // suspended us.
2013 //
2014 ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
2015 assert(ret != 0, "ReleaseSemaphore() failed");
2016
2017 thread->java_suspend_self();
2018 }
2019 } while (threadIsSuspended);
2020 }
2021 }
2022
2023 int os::signal_lookup() {
2024 return check_pending_signals(false);
2025 }
2026
2027 int os::signal_wait() {
2028 return check_pending_signals(true);
2029 }
2030
2031 // Implicit OS exception handling
2032
2033 LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) {
2034 JavaThread* thread = JavaThread::current();
2035 // Save pc in thread
2036 #ifdef _M_IA64
2037 // Do not blow up if no thread info available.
2038 if (thread) {
2039 // Saving PRECISE pc (with slot information) in thread.
2040 uint64_t precise_pc = (uint64_t) exceptionInfo->ExceptionRecord->ExceptionAddress;
2041 // Convert precise PC into "Unix" format
2042 precise_pc = (precise_pc & 0xFFFFFFFFFFFFFFF0) | ((precise_pc & 0xF) >> 2);
2043 thread->set_saved_exception_pc((address)precise_pc);
2044 }
2045 // Set pc to handler
2046 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler;
2047 // Clear out psr.ri (= Restart Instruction) in order to continue
2048 // at the beginning of the target bundle.
2049 exceptionInfo->ContextRecord->StIPSR &= 0xFFFFF9FFFFFFFFFF;
2050 assert(((DWORD64)handler & 0xF) == 0, "Target address must point to the beginning of a bundle!");
2051 #elif _M_AMD64
2052 // Do not blow up if no thread info available.
2053 if (thread) {
2054 thread->set_saved_exception_pc((address)(DWORD_PTR)exceptionInfo->ContextRecord->Rip);
2055 }
2056 // Set pc to handler
2057 exceptionInfo->ContextRecord->Rip = (DWORD64)handler;
2058 #else
2059 // Do not blow up if no thread info available.
2060 if (thread) {
2061 thread->set_saved_exception_pc((address)(DWORD_PTR)exceptionInfo->ContextRecord->Eip);
2062 }
2063 // Set pc to handler
2064 exceptionInfo->ContextRecord->Eip = (DWORD)(DWORD_PTR)handler;
2065 #endif
2066
2067 // Continue the execution
2068 return EXCEPTION_CONTINUE_EXECUTION;
2069 }
2070
2071
2072 // Used for PostMortemDump
2073 extern "C" void safepoints();
2074 extern "C" void find(int x);
2075 extern "C" void events();
2076
2077 // According to Windows API documentation, an illegal instruction sequence should generate
2078 // the 0xC000001C exception code. However, real world experience shows that occasionnaly
2079 // the execution of an illegal instruction can generate the exception code 0xC000001E. This
2080 // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems).
2081
2082 #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E
2083
2084 // From "Execution Protection in the Windows Operating System" draft 0.35
2085 // Once a system header becomes available, the "real" define should be
2086 // included or copied here.
2087 #define EXCEPTION_INFO_EXEC_VIOLATION 0x08
2088
2089 // Handle NAT Bit consumption on IA64.
2090 #ifdef _M_IA64
2091 #define EXCEPTION_REG_NAT_CONSUMPTION STATUS_REG_NAT_CONSUMPTION
2092 #endif
2093
2094 // Windows Vista/2008 heap corruption check
2095 #define EXCEPTION_HEAP_CORRUPTION 0xC0000374
2096
2097 #define def_excpt(val) #val, val
2098
2099 struct siglabel {
2100 char *name;
2101 int number;
2102 };
2103
2104 // All Visual C++ exceptions thrown from code generated by the Microsoft Visual
2105 // C++ compiler contain this error code. Because this is a compiler-generated
2106 // error, the code is not listed in the Win32 API header files.
2107 // The code is actually a cryptic mnemonic device, with the initial "E"
2108 // standing for "exception" and the final 3 bytes (0x6D7363) representing the
2109 // ASCII values of "msc".
2110
2111 #define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363
2112
2113
2114 struct siglabel exceptlabels[] = {
2115 def_excpt(EXCEPTION_ACCESS_VIOLATION),
2116 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
2117 def_excpt(EXCEPTION_BREAKPOINT),
2118 def_excpt(EXCEPTION_SINGLE_STEP),
2119 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED),
2120 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND),
2121 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO),
2122 def_excpt(EXCEPTION_FLT_INEXACT_RESULT),
2123 def_excpt(EXCEPTION_FLT_INVALID_OPERATION),
2124 def_excpt(EXCEPTION_FLT_OVERFLOW),
2125 def_excpt(EXCEPTION_FLT_STACK_CHECK),
2126 def_excpt(EXCEPTION_FLT_UNDERFLOW),
2127 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO),
2128 def_excpt(EXCEPTION_INT_OVERFLOW),
2129 def_excpt(EXCEPTION_PRIV_INSTRUCTION),
2130 def_excpt(EXCEPTION_IN_PAGE_ERROR),
2131 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION),
2132 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2),
2133 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION),
2134 def_excpt(EXCEPTION_STACK_OVERFLOW),
2135 def_excpt(EXCEPTION_INVALID_DISPOSITION),
2136 def_excpt(EXCEPTION_GUARD_PAGE),
2137 def_excpt(EXCEPTION_INVALID_HANDLE),
2138 def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION),
2139 def_excpt(EXCEPTION_HEAP_CORRUPTION),
2140 #ifdef _M_IA64
2141 def_excpt(EXCEPTION_REG_NAT_CONSUMPTION),
2142 #endif
2143 NULL, 0
2144 };
2145
2146 const char* os::exception_name(int exception_code, char *buf, size_t size) {
2147 for (int i = 0; exceptlabels[i].name != NULL; i++) {
2148 if (exceptlabels[i].number == exception_code) {
2149 jio_snprintf(buf, size, "%s", exceptlabels[i].name);
2150 return buf;
2151 }
2152 }
2153
2154 return NULL;
2155 }
2156
2157 //-----------------------------------------------------------------------------
2158 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2159 // handle exception caused by idiv; should only happen for -MinInt/-1
2160 // (division by zero is handled explicitly)
2161 #ifdef _M_IA64
2162 assert(0, "Fix Handle_IDiv_Exception");
2163 #elif _M_AMD64
2164 PCONTEXT ctx = exceptionInfo->ContextRecord;
2165 address pc = (address)ctx->Rip;
2166 assert(pc[0] == 0xF7, "not an idiv opcode");
2167 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2168 assert(ctx->Rax == min_jint, "unexpected idiv exception");
2169 // set correct result values and continue after idiv instruction
2170 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2171 ctx->Rax = (DWORD)min_jint; // result
2172 ctx->Rdx = (DWORD)0; // remainder
2173 // Continue the execution
2174 #else
2175 PCONTEXT ctx = exceptionInfo->ContextRecord;
2176 address pc = (address)ctx->Eip;
2177 assert(pc[0] == 0xF7, "not an idiv opcode");
2178 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2179 assert(ctx->Eax == min_jint, "unexpected idiv exception");
2180 // set correct result values and continue after idiv instruction
2181 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2182 ctx->Eax = (DWORD)min_jint; // result
2183 ctx->Edx = (DWORD)0; // remainder
2184 // Continue the execution
2185 #endif
2186 return EXCEPTION_CONTINUE_EXECUTION;
2187 }
2188
2189 #ifndef _WIN64
2190 //-----------------------------------------------------------------------------
2191 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2192 // handle exception caused by native method modifying control word
2193 PCONTEXT ctx = exceptionInfo->ContextRecord;
2194 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2195
2196 switch (exception_code) {
2197 case EXCEPTION_FLT_DENORMAL_OPERAND:
2198 case EXCEPTION_FLT_DIVIDE_BY_ZERO:
2199 case EXCEPTION_FLT_INEXACT_RESULT:
2200 case EXCEPTION_FLT_INVALID_OPERATION:
2201 case EXCEPTION_FLT_OVERFLOW:
2202 case EXCEPTION_FLT_STACK_CHECK:
2203 case EXCEPTION_FLT_UNDERFLOW:
2204 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std());
2205 if (fp_control_word != ctx->FloatSave.ControlWord) {
2206 // Restore FPCW and mask out FLT exceptions
2207 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0;
2208 // Mask out pending FLT exceptions
2209 ctx->FloatSave.StatusWord &= 0xffffff00;
2210 return EXCEPTION_CONTINUE_EXECUTION;
2211 }
2212 }
2213
2214 if (prev_uef_handler != NULL) {
2215 // We didn't handle this exception so pass it to the previous
2216 // UnhandledExceptionFilter.
2217 return (prev_uef_handler)(exceptionInfo);
2218 }
2219
2220 return EXCEPTION_CONTINUE_SEARCH;
2221 }
2222 #else //_WIN64
2223 /*
2224 On Windows, the mxcsr control bits are non-volatile across calls
2225 See also CR 6192333
2226 If EXCEPTION_FLT_* happened after some native method modified
2227 mxcsr - it is not a jvm fault.
2228 However should we decide to restore of mxcsr after a faulty
2229 native method we can uncomment following code
2230 jint MxCsr = INITIAL_MXCSR;
2231 // we can't use StubRoutines::addr_mxcsr_std()
2232 // because in Win64 mxcsr is not saved there
2233 if (MxCsr != ctx->MxCsr) {
2234 ctx->MxCsr = MxCsr;
2235 return EXCEPTION_CONTINUE_EXECUTION;
2236 }
2237
2238 */
2239 #endif //_WIN64
2240
2241
2242 // Fatal error reporting is single threaded so we can make this a
2243 // static and preallocated. If it's more than MAX_PATH silently ignore
2244 // it.
2245 static char saved_error_file[MAX_PATH] = {0};
2246
2247 void os::set_error_file(const char *logfile) {
2248 if (strlen(logfile) <= MAX_PATH) {
2249 strncpy(saved_error_file, logfile, MAX_PATH);
2250 }
2251 }
2252
2253 static inline void report_error(Thread* t, DWORD exception_code,
2254 address addr, void* siginfo, void* context) {
2255 VMError err(t, exception_code, addr, siginfo, context);
2256 err.report_and_die();
2257
2258 // If UseOsErrorReporting, this will return here and save the error file
2259 // somewhere where we can find it in the minidump.
2260 }
2261
2262 //-----------------------------------------------------------------------------
2263 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
2264 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH;
2265 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2266 #ifdef _M_IA64
2267 // On Itanium, we need the "precise pc", which has the slot number coded
2268 // into the least 4 bits: 0000=slot0, 0100=slot1, 1000=slot2 (Windows format).
2269 address pc = (address) exceptionInfo->ExceptionRecord->ExceptionAddress;
2270 // Convert the pc to "Unix format", which has the slot number coded
2271 // into the least 2 bits: 0000=slot0, 0001=slot1, 0010=slot2
2272 // This is needed for IA64 because "relocation" / "implicit null check" / "poll instruction"
2273 // information is saved in the Unix format.
2274 address pc_unix_format = (address) ((((uint64_t)pc) & 0xFFFFFFFFFFFFFFF0) | ((((uint64_t)pc) & 0xF) >> 2));
2275 #elif _M_AMD64
2276 address pc = (address) exceptionInfo->ContextRecord->Rip;
2277 #else
2278 address pc = (address) exceptionInfo->ContextRecord->Eip;
2279 #endif
2280 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady
2281
2282 #ifndef _WIN64
2283 // Execution protection violation - win32 running on AMD64 only
2284 // Handled first to avoid misdiagnosis as a "normal" access violation;
2285 // This is safe to do because we have a new/unique ExceptionInformation
2286 // code for this condition.
2287 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2288 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2289 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0];
2290 address addr = (address) exceptionRecord->ExceptionInformation[1];
2291
2292 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) {
2293 int page_size = os::vm_page_size();
2294
2295 // Make sure the pc and the faulting address are sane.
2296 //
2297 // If an instruction spans a page boundary, and the page containing
2298 // the beginning of the instruction is executable but the following
2299 // page is not, the pc and the faulting address might be slightly
2300 // different - we still want to unguard the 2nd page in this case.
2301 //
2302 // 15 bytes seems to be a (very) safe value for max instruction size.
2303 bool pc_is_near_addr =
2304 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
2305 bool instr_spans_page_boundary =
2306 (align_size_down((intptr_t) pc ^ (intptr_t) addr,
2307 (intptr_t) page_size) > 0);
2308
2309 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
2310 static volatile address last_addr =
2311 (address) os::non_memory_address_word();
2312
2313 // In conservative mode, don't unguard unless the address is in the VM
2314 if (UnguardOnExecutionViolation > 0 && addr != last_addr &&
2315 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
2316
2317 // Set memory to RWX and retry
2318 address page_start =
2319 (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
2320 bool res = os::protect_memory((char*) page_start, page_size,
2321 os::MEM_PROT_RWX);
2322
2323 if (PrintMiscellaneous && Verbose) {
2324 char buf[256];
2325 jio_snprintf(buf, sizeof(buf), "Execution protection violation "
2326 "at " INTPTR_FORMAT
2327 ", unguarding " INTPTR_FORMAT ": %s", addr,
2328 page_start, (res ? "success" : strerror(errno)));
2329 tty->print_raw_cr(buf);
2330 }
2331
2332 // Set last_addr so if we fault again at the same address, we don't
2333 // end up in an endless loop.
2334 //
2335 // There are two potential complications here. Two threads trapping
2336 // at the same address at the same time could cause one of the
2337 // threads to think it already unguarded, and abort the VM. Likely
2338 // very rare.
2339 //
2340 // The other race involves two threads alternately trapping at
2341 // different addresses and failing to unguard the page, resulting in
2342 // an endless loop. This condition is probably even more unlikely
2343 // than the first.
2344 //
2345 // Although both cases could be avoided by using locks or thread
2346 // local last_addr, these solutions are unnecessary complication:
2347 // this handler is a best-effort safety net, not a complete solution.
2348 // It is disabled by default and should only be used as a workaround
2349 // in case we missed any no-execute-unsafe VM code.
2350
2351 last_addr = addr;
2352
2353 return EXCEPTION_CONTINUE_EXECUTION;
2354 }
2355 }
2356
2357 // Last unguard failed or not unguarding
2358 tty->print_raw_cr("Execution protection violation");
2359 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord,
2360 exceptionInfo->ContextRecord);
2361 return EXCEPTION_CONTINUE_SEARCH;
2362 }
2363 }
2364 #endif // _WIN64
2365
2366 // Check to see if we caught the safepoint code in the
2367 // process of write protecting the memory serialization page.
2368 // It write enables the page immediately after protecting it
2369 // so just return.
2370 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
2371 JavaThread* thread = (JavaThread*) t;
2372 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2373 address addr = (address) exceptionRecord->ExceptionInformation[1];
2374 if ( os::is_memory_serialize_page(thread, addr) ) {
2375 // Block current thread until the memory serialize page permission restored.
2376 os::block_on_serialize_page_trap();
2377 return EXCEPTION_CONTINUE_EXECUTION;
2378 }
2379 }
2380
2381 if (t != NULL && t->is_Java_thread()) {
2382 JavaThread* thread = (JavaThread*) t;
2383 bool in_java = thread->thread_state() == _thread_in_Java;
2384
2385 // Handle potential stack overflows up front.
2386 if (exception_code == EXCEPTION_STACK_OVERFLOW) {
2387 if (os::uses_stack_guard_pages()) {
2388 #ifdef _M_IA64
2389 // Use guard page for register stack.
2390 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2391 address addr = (address) exceptionRecord->ExceptionInformation[1];
2392 // Check for a register stack overflow on Itanium
2393 if (thread->addr_inside_register_stack_red_zone(addr)) {
2394 // Fatal red zone violation happens if the Java program
2395 // catches a StackOverflow error and does so much processing
2396 // that it runs beyond the unprotected yellow guard zone. As
2397 // a result, we are out of here.
2398 fatal("ERROR: Unrecoverable stack overflow happened. JVM will exit.");
2399 } else if(thread->addr_inside_register_stack(addr)) {
2400 // Disable the yellow zone which sets the state that
2401 // we've got a stack overflow problem.
2402 if (thread->stack_yellow_zone_enabled()) {
2403 thread->disable_stack_yellow_zone();
2404 }
2405 // Give us some room to process the exception.
2406 thread->disable_register_stack_guard();
2407 // Tracing with +Verbose.
2408 if (Verbose) {
2409 tty->print_cr("SOF Compiled Register Stack overflow at " INTPTR_FORMAT " (SIGSEGV)", pc);
2410 tty->print_cr("Register Stack access at " INTPTR_FORMAT, addr);
2411 tty->print_cr("Register Stack base " INTPTR_FORMAT, thread->register_stack_base());
2412 tty->print_cr("Register Stack [" INTPTR_FORMAT "," INTPTR_FORMAT "]",
2413 thread->register_stack_base(),
2414 thread->register_stack_base() + thread->stack_size());
2415 }
2416
2417 // Reguard the permanent register stack red zone just to be sure.
2418 // We saw Windows silently disabling this without telling us.
2419 thread->enable_register_stack_red_zone();
2420
2421 return Handle_Exception(exceptionInfo,
2422 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2423 }
2424 #endif
2425 if (thread->stack_yellow_zone_enabled()) {
2426 // Yellow zone violation. The o/s has unprotected the first yellow
2427 // zone page for us. Note: must call disable_stack_yellow_zone to
2428 // update the enabled status, even if the zone contains only one page.
2429 thread->disable_stack_yellow_zone();
2430 // If not in java code, return and hope for the best.
2431 return in_java ? Handle_Exception(exceptionInfo,
2432 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
2433 : EXCEPTION_CONTINUE_EXECUTION;
2434 } else {
2435 // Fatal red zone violation.
2436 thread->disable_stack_red_zone();
2437 tty->print_raw_cr("An unrecoverable stack overflow has occurred.");
2438 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2439 exceptionInfo->ContextRecord);
2440 return EXCEPTION_CONTINUE_SEARCH;
2441 }
2442 } else if (in_java) {
2443 // JVM-managed guard pages cannot be used on win95/98. The o/s provides
2444 // a one-time-only guard page, which it has released to us. The next
2445 // stack overflow on this thread will result in an ACCESS_VIOLATION.
2446 return Handle_Exception(exceptionInfo,
2447 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2448 } else {
2449 // Can only return and hope for the best. Further stack growth will
2450 // result in an ACCESS_VIOLATION.
2451 return EXCEPTION_CONTINUE_EXECUTION;
2452 }
2453 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2454 // Either stack overflow or null pointer exception.
2455 if (in_java) {
2456 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2457 address addr = (address) exceptionRecord->ExceptionInformation[1];
2458 address stack_end = thread->stack_base() - thread->stack_size();
2459 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) {
2460 // Stack overflow.
2461 assert(!os::uses_stack_guard_pages(),
2462 "should be caught by red zone code above.");
2463 return Handle_Exception(exceptionInfo,
2464 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2465 }
2466 //
2467 // Check for safepoint polling and implicit null
2468 // We only expect null pointers in the stubs (vtable)
2469 // the rest are checked explicitly now.
2470 //
2471 CodeBlob* cb = CodeCache::find_blob(pc);
2472 if (cb != NULL) {
2473 if (os::is_poll_address(addr)) {
2474 address stub = SharedRuntime::get_poll_stub(pc);
2475 return Handle_Exception(exceptionInfo, stub);
2476 }
2477 }
2478 {
2479 #ifdef _WIN64
2480 //
2481 // If it's a legal stack address map the entire region in
2482 //
2483 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2484 address addr = (address) exceptionRecord->ExceptionInformation[1];
2485 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
2486 addr = (address)((uintptr_t)addr &
2487 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
2488 os::commit_memory((char *)addr, thread->stack_base() - addr,
2489 false );
2490 return EXCEPTION_CONTINUE_EXECUTION;
2491 }
2492 else
2493 #endif
2494 {
2495 // Null pointer exception.
2496 #ifdef _M_IA64
2497 // Process implicit null checks in compiled code. Note: Implicit null checks
2498 // can happen even if "ImplicitNullChecks" is disabled, e.g. in vtable stubs.
2499 if (CodeCache::contains((void*) pc_unix_format) && !MacroAssembler::needs_explicit_null_check((intptr_t) addr)) {
2500 CodeBlob *cb = CodeCache::find_blob_unsafe(pc_unix_format);
2501 // Handle implicit null check in UEP method entry
2502 if (cb && (cb->is_frame_complete_at(pc) ||
2503 (cb->is_nmethod() && ((nmethod *)cb)->inlinecache_check_contains(pc)))) {
2504 if (Verbose) {
2505 intptr_t *bundle_start = (intptr_t*) ((intptr_t) pc_unix_format & 0xFFFFFFFFFFFFFFF0);
2506 tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGSEGV)", pc_unix_format);
2507 tty->print_cr(" to addr " INTPTR_FORMAT, addr);
2508 tty->print_cr(" bundle is " INTPTR_FORMAT " (high), " INTPTR_FORMAT " (low)",
2509 *(bundle_start + 1), *bundle_start);
2510 }
2511 return Handle_Exception(exceptionInfo,
2512 SharedRuntime::continuation_for_implicit_exception(thread, pc_unix_format, SharedRuntime::IMPLICIT_NULL));
2513 }
2514 }
2515
2516 // Implicit null checks were processed above. Hence, we should not reach
2517 // here in the usual case => die!
2518 if (Verbose) tty->print_raw_cr("Access violation, possible null pointer exception");
2519 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2520 exceptionInfo->ContextRecord);
2521 return EXCEPTION_CONTINUE_SEARCH;
2522
2523 #else // !IA64
2524
2525 // Windows 98 reports faulting addresses incorrectly
2526 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) ||
2527 !os::win32::is_nt()) {
2528 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
2529 if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
2530 }
2531 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2532 exceptionInfo->ContextRecord);
2533 return EXCEPTION_CONTINUE_SEARCH;
2534 #endif
2535 }
2536 }
2537 }
2538
2539 #ifdef _WIN64
2540 // Special care for fast JNI field accessors.
2541 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks
2542 // in and the heap gets shrunk before the field access.
2543 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2544 address addr = JNI_FastGetField::find_slowcase_pc(pc);
2545 if (addr != (address)-1) {
2546 return Handle_Exception(exceptionInfo, addr);
2547 }
2548 }
2549 #endif
2550
2551 // Stack overflow or null pointer exception in native code.
2552 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2553 exceptionInfo->ContextRecord);
2554 return EXCEPTION_CONTINUE_SEARCH;
2555 } // /EXCEPTION_ACCESS_VIOLATION
2556 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2557 #if defined _M_IA64
2558 else if ((exception_code == EXCEPTION_ILLEGAL_INSTRUCTION ||
2559 exception_code == EXCEPTION_ILLEGAL_INSTRUCTION_2)) {
2560 M37 handle_wrong_method_break(0, NativeJump::HANDLE_WRONG_METHOD, PR0);
2561
2562 // Compiled method patched to be non entrant? Following conditions must apply:
2563 // 1. must be first instruction in bundle
2564 // 2. must be a break instruction with appropriate code
2565 if((((uint64_t) pc & 0x0F) == 0) &&
2566 (((IPF_Bundle*) pc)->get_slot0() == handle_wrong_method_break.bits())) {
2567 return Handle_Exception(exceptionInfo,
2568 (address)SharedRuntime::get_handle_wrong_method_stub());
2569 }
2570 } // /EXCEPTION_ILLEGAL_INSTRUCTION
2571 #endif
2572
2573
2574 if (in_java) {
2575 switch (exception_code) {
2576 case EXCEPTION_INT_DIVIDE_BY_ZERO:
2577 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO));
2578
2579 case EXCEPTION_INT_OVERFLOW:
2580 return Handle_IDiv_Exception(exceptionInfo);
2581
2582 } // switch
2583 }
2584 #ifndef _WIN64
2585 if (((thread->thread_state() == _thread_in_Java) ||
2586 (thread->thread_state() == _thread_in_native)) &&
2587 exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION)
2588 {
2589 LONG result=Handle_FLT_Exception(exceptionInfo);
2590 if (result==EXCEPTION_CONTINUE_EXECUTION) return result;
2591 }
2592 #endif //_WIN64
2593 }
2594
2595 if (exception_code != EXCEPTION_BREAKPOINT) {
2596 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2597 exceptionInfo->ContextRecord);
2598 }
2599 return EXCEPTION_CONTINUE_SEARCH;
2600 }
2601
2602 #ifndef _WIN64
2603 // Special care for fast JNI accessors.
2604 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and
2605 // the heap gets shrunk before the field access.
2606 // Need to install our own structured exception handler since native code may
2607 // install its own.
2608 LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
2609 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2610 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2611 address pc = (address) exceptionInfo->ContextRecord->Eip;
2612 address addr = JNI_FastGetField::find_slowcase_pc(pc);
2613 if (addr != (address)-1) {
2614 return Handle_Exception(exceptionInfo, addr);
2615 }
2616 }
2617 return EXCEPTION_CONTINUE_SEARCH;
2618 }
2619
2620 #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \
2621 Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \
2622 __try { \
2623 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \
2624 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \
2625 } \
2626 return 0; \
2627 }
2628
2629 DEFINE_FAST_GETFIELD(jboolean, bool, Boolean)
2630 DEFINE_FAST_GETFIELD(jbyte, byte, Byte)
2631 DEFINE_FAST_GETFIELD(jchar, char, Char)
2632 DEFINE_FAST_GETFIELD(jshort, short, Short)
2633 DEFINE_FAST_GETFIELD(jint, int, Int)
2634 DEFINE_FAST_GETFIELD(jlong, long, Long)
2635 DEFINE_FAST_GETFIELD(jfloat, float, Float)
2636 DEFINE_FAST_GETFIELD(jdouble, double, Double)
2637
2638 address os::win32::fast_jni_accessor_wrapper(BasicType type) {
2639 switch (type) {
2640 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper;
2641 case T_BYTE: return (address)jni_fast_GetByteField_wrapper;
2642 case T_CHAR: return (address)jni_fast_GetCharField_wrapper;
2643 case T_SHORT: return (address)jni_fast_GetShortField_wrapper;
2644 case T_INT: return (address)jni_fast_GetIntField_wrapper;
2645 case T_LONG: return (address)jni_fast_GetLongField_wrapper;
2646 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper;
2647 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper;
2648 default: ShouldNotReachHere();
2649 }
2650 return (address)-1;
2651 }
2652 #endif
2653
2654 // Virtual Memory
2655
2656 int os::vm_page_size() { return os::win32::vm_page_size(); }
2657 int os::vm_allocation_granularity() {
2658 return os::win32::vm_allocation_granularity();
2659 }
2660
2661 // Windows large page support is available on Windows 2003. In order to use
2662 // large page memory, the administrator must first assign additional privilege
2663 // to the user:
2664 // + select Control Panel -> Administrative Tools -> Local Security Policy
2665 // + select Local Policies -> User Rights Assignment
2666 // + double click "Lock pages in memory", add users and/or groups
2667 // + reboot
2668 // Note the above steps are needed for administrator as well, as administrators
2669 // by default do not have the privilege to lock pages in memory.
2670 //
2671 // Note about Windows 2003: although the API supports committing large page
2672 // memory on a page-by-page basis and VirtualAlloc() returns success under this
2673 // scenario, I found through experiment it only uses large page if the entire
2674 // memory region is reserved and committed in a single VirtualAlloc() call.
2675 // This makes Windows large page support more or less like Solaris ISM, in
2676 // that the entire heap must be committed upfront. This probably will change
2677 // in the future, if so the code below needs to be revisited.
2678
2679 #ifndef MEM_LARGE_PAGES
2680 #define MEM_LARGE_PAGES 0x20000000
2681 #endif
2682
2683 static HANDLE _hProcess;
2684 static HANDLE _hToken;
2685
2686 // Container for NUMA node list info
2687 class NUMANodeListHolder {
2688 private:
2689 int *_numa_used_node_list; // allocated below
2690 int _numa_used_node_count;
2691
2692 void free_node_list() {
2693 if (_numa_used_node_list != NULL) {
2694 FREE_C_HEAP_ARRAY(int, _numa_used_node_list, mtInternal);
2695 }
2696 }
2697
2698 public:
2699 NUMANodeListHolder() {
2700 _numa_used_node_count = 0;
2701 _numa_used_node_list = NULL;
2702 // do rest of initialization in build routine (after function pointers are set up)
2703 }
2704
2705 ~NUMANodeListHolder() {
2706 free_node_list();
2707 }
2708
2709 bool build() {
2710 DWORD_PTR proc_aff_mask;
2711 DWORD_PTR sys_aff_mask;
2712 if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false;
2713 ULONG highest_node_number;
2714 if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false;
2715 free_node_list();
2716 _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1, mtInternal);
2717 for (unsigned int i = 0; i <= highest_node_number; i++) {
2718 ULONGLONG proc_mask_numa_node;
2719 if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false;
2720 if ((proc_aff_mask & proc_mask_numa_node)!=0) {
2721 _numa_used_node_list[_numa_used_node_count++] = i;
2722 }
2723 }
2724 return (_numa_used_node_count > 1);
2725 }
2726
2727 int get_count() {return _numa_used_node_count;}
2728 int get_node_list_entry(int n) {
2729 // for indexes out of range, returns -1
2730 return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1);
2731 }
2732
2733 } numa_node_list_holder;
2734
2735
2736
2737 static size_t _large_page_size = 0;
2738
2739 static bool resolve_functions_for_large_page_init() {
2740 return os::Kernel32Dll::GetLargePageMinimumAvailable() &&
2741 os::Advapi32Dll::AdvapiAvailable();
2742 }
2743
2744 static bool request_lock_memory_privilege() {
2745 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE,
2746 os::current_process_id());
2747
2748 LUID luid;
2749 if (_hProcess != NULL &&
2750 os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) &&
2751 os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) {
2752
2753 TOKEN_PRIVILEGES tp;
2754 tp.PrivilegeCount = 1;
2755 tp.Privileges[0].Luid = luid;
2756 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
2757
2758 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the
2759 // privilege. Check GetLastError() too. See MSDN document.
2760 if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) &&
2761 (GetLastError() == ERROR_SUCCESS)) {
2762 return true;
2763 }
2764 }
2765
2766 return false;
2767 }
2768
2769 static void cleanup_after_large_page_init() {
2770 if (_hProcess) CloseHandle(_hProcess);
2771 _hProcess = NULL;
2772 if (_hToken) CloseHandle(_hToken);
2773 _hToken = NULL;
2774 }
2775
2776 static bool numa_interleaving_init() {
2777 bool success = false;
2778 bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving);
2779
2780 // print a warning if UseNUMAInterleaving flag is specified on command line
2781 bool warn_on_failure = use_numa_interleaving_specified;
2782 # define WARN(msg) if (warn_on_failure) { warning(msg); }
2783
2784 // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages)
2785 size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
2786 NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity);
2787
2788 if (os::Kernel32Dll::NumaCallsAvailable()) {
2789 if (numa_node_list_holder.build()) {
2790 if (PrintMiscellaneous && Verbose) {
2791 tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count());
2792 for (int i = 0; i < numa_node_list_holder.get_count(); i++) {
2793 tty->print("%d ", numa_node_list_holder.get_node_list_entry(i));
2794 }
2795 tty->print("\n");
2796 }
2797 success = true;
2798 } else {
2799 WARN("Process does not cover multiple NUMA nodes.");
2800 }
2801 } else {
2802 WARN("NUMA Interleaving is not supported by the operating system.");
2803 }
2804 if (!success) {
2805 if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag.");
2806 }
2807 return success;
2808 #undef WARN
2809 }
2810
2811 // this routine is used whenever we need to reserve a contiguous VA range
2812 // but we need to make separate VirtualAlloc calls for each piece of the range
2813 // Reasons for doing this:
2814 // * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise)
2815 // * UseNUMAInterleaving requires a separate node for each piece
2816 static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot,
2817 bool should_inject_error=false) {
2818 char * p_buf;
2819 // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size
2820 size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
2821 size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size;
2822
2823 // first reserve enough address space in advance since we want to be
2824 // able to break a single contiguous virtual address range into multiple
2825 // large page commits but WS2003 does not allow reserving large page space
2826 // so we just use 4K pages for reserve, this gives us a legal contiguous
2827 // address space. then we will deallocate that reservation, and re alloc
2828 // using large pages
2829 const size_t size_of_reserve = bytes + chunk_size;
2830 if (bytes > size_of_reserve) {
2831 // Overflowed.
2832 return NULL;
2833 }
2834 p_buf = (char *) VirtualAlloc(addr,
2835 size_of_reserve, // size of Reserve
2836 MEM_RESERVE,
2837 PAGE_READWRITE);
2838 // If reservation failed, return NULL
2839 if (p_buf == NULL) return NULL;
2840 MemTracker::record_virtual_memory_reserve((address)p_buf, size_of_reserve, CALLER_PC);
2841 os::release_memory(p_buf, bytes + chunk_size);
2842
2843 // we still need to round up to a page boundary (in case we are using large pages)
2844 // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size)
2845 // instead we handle this in the bytes_to_rq computation below
2846 p_buf = (char *) align_size_up((size_t)p_buf, page_size);
2847
2848 // now go through and allocate one chunk at a time until all bytes are
2849 // allocated
2850 size_t bytes_remaining = bytes;
2851 // An overflow of align_size_up() would have been caught above
2852 // in the calculation of size_of_reserve.
2853 char * next_alloc_addr = p_buf;
2854 HANDLE hProc = GetCurrentProcess();
2855
2856 #ifdef ASSERT
2857 // Variable for the failure injection
2858 long ran_num = os::random();
2859 size_t fail_after = ran_num % bytes;
2860 #endif
2861
2862 int count=0;
2863 while (bytes_remaining) {
2864 // select bytes_to_rq to get to the next chunk_size boundary
2865
2866 size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size));
2867 // Note allocate and commit
2868 char * p_new;
2869
2870 #ifdef ASSERT
2871 bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after);
2872 #else
2873 const bool inject_error_now = false;
2874 #endif
2875
2876 if (inject_error_now) {
2877 p_new = NULL;
2878 } else {
2879 if (!UseNUMAInterleaving) {
2880 p_new = (char *) VirtualAlloc(next_alloc_addr,
2881 bytes_to_rq,
2882 flags,
2883 prot);
2884 } else {
2885 // get the next node to use from the used_node_list
2886 assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected");
2887 DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count());
2888 p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc,
2889 next_alloc_addr,
2890 bytes_to_rq,
2891 flags,
2892 prot,
2893 node);
2894 }
2895 }
2896
2897 if (p_new == NULL) {
2898 // Free any allocated pages
2899 if (next_alloc_addr > p_buf) {
2900 // Some memory was committed so release it.
2901 size_t bytes_to_release = bytes - bytes_remaining;
2902 // NMT has yet to record any individual blocks, so it
2903 // need to create a dummy 'reserve' record to match
2904 // the release.
2905 MemTracker::record_virtual_memory_reserve((address)p_buf,
2906 bytes_to_release, CALLER_PC);
2907 os::release_memory(p_buf, bytes_to_release);
2908 }
2909 #ifdef ASSERT
2910 if (should_inject_error) {
2911 if (TracePageSizes && Verbose) {
2912 tty->print_cr("Reserving pages individually failed.");
2913 }
2914 }
2915 #endif
2916 return NULL;
2917 }
2918
2919 bytes_remaining -= bytes_to_rq;
2920 next_alloc_addr += bytes_to_rq;
2921 count++;
2922 }
2923 // Although the memory is allocated individually, it is returned as one.
2924 // NMT records it as one block.
2925 address pc = CALLER_PC;
2926 MemTracker::record_virtual_memory_reserve((address)p_buf, bytes, pc);
2927 if ((flags & MEM_COMMIT) != 0) {
2928 MemTracker::record_virtual_memory_commit((address)p_buf, bytes, pc);
2929 }
2930
2931 // made it this far, success
2932 return p_buf;
2933 }
2934
2935
2936
2937 void os::large_page_init() {
2938 if (!UseLargePages) return;
2939
2940 // print a warning if any large page related flag is specified on command line
2941 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
2942 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
2943 bool success = false;
2944
2945 # define WARN(msg) if (warn_on_failure) { warning(msg); }
2946 if (resolve_functions_for_large_page_init()) {
2947 if (request_lock_memory_privilege()) {
2948 size_t s = os::Kernel32Dll::GetLargePageMinimum();
2949 if (s) {
2950 #if defined(IA32) || defined(AMD64)
2951 if (s > 4*M || LargePageSizeInBytes > 4*M) {
2952 WARN("JVM cannot use large pages bigger than 4mb.");
2953 } else {
2954 #endif
2955 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) {
2956 _large_page_size = LargePageSizeInBytes;
2957 } else {
2958 _large_page_size = s;
2959 }
2960 success = true;
2961 #if defined(IA32) || defined(AMD64)
2962 }
2963 #endif
2964 } else {
2965 WARN("Large page is not supported by the processor.");
2966 }
2967 } else {
2968 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.");
2969 }
2970 } else {
2971 WARN("Large page is not supported by the operating system.");
2972 }
2973 #undef WARN
2974
2975 const size_t default_page_size = (size_t) vm_page_size();
2976 if (success && _large_page_size > default_page_size) {
2977 _page_sizes[0] = _large_page_size;
2978 _page_sizes[1] = default_page_size;
2979 _page_sizes[2] = 0;
2980 }
2981
2982 cleanup_after_large_page_init();
2983 UseLargePages = success;
2984 }
2985
2986 // On win32, one cannot release just a part of reserved memory, it's an
2987 // all or nothing deal. When we split a reservation, we must break the
2988 // reservation into two reservations.
2989 void os::pd_split_reserved_memory(char *base, size_t size, size_t split,
2990 bool realloc) {
2991 if (size > 0) {
2992 release_memory(base, size);
2993 if (realloc) {
2994 reserve_memory(split, base);
2995 }
2996 if (size != split) {
2997 reserve_memory(size - split, base + split);
2998 }
2999 }
3000 }
3001
3002 // Multiple threads can race in this code but it's not possible to unmap small sections of
3003 // virtual space to get requested alignment, like posix-like os's.
3004 // Windows prevents multiple thread from remapping over each other so this loop is thread-safe.
3005 char* os::reserve_memory_aligned(size_t size, size_t alignment) {
3006 assert((alignment & (os::vm_allocation_granularity() - 1)) == 0,
3007 "Alignment must be a multiple of allocation granularity (page size)");
3008 assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned");
3009
3010 size_t extra_size = size + alignment;
3011 assert(extra_size >= size, "overflow, size is too large to allow alignment");
3012
3013 char* aligned_base = NULL;
3014
3015 do {
3016 char* extra_base = os::reserve_memory(extra_size, NULL, alignment);
3017 if (extra_base == NULL) {
3018 return NULL;
3019 }
3020 // Do manual alignment
3021 aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment);
3022
3023 os::release_memory(extra_base, extra_size);
3024
3025 aligned_base = os::reserve_memory(size, aligned_base);
3026
3027 } while (aligned_base == NULL);
3028
3029 return aligned_base;
3030 }
3031
3032 char* os::pd_reserve_memory(size_t bytes, char* addr, size_t alignment_hint) {
3033 assert((size_t)addr % os::vm_allocation_granularity() == 0,
3034 "reserve alignment");
3035 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
3036 char* res;
3037 // note that if UseLargePages is on, all the areas that require interleaving
3038 // will go thru reserve_memory_special rather than thru here.
3039 bool use_individual = (UseNUMAInterleaving && !UseLargePages);
3040 if (!use_individual) {
3041 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
3042 } else {
3043 elapsedTimer reserveTimer;
3044 if( Verbose && PrintMiscellaneous ) reserveTimer.start();
3045 // in numa interleaving, we have to allocate pages individually
3046 // (well really chunks of NUMAInterleaveGranularity size)
3047 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE);
3048 if (res == NULL) {
3049 warning("NUMA page allocation failed");
3050 }
3051 if( Verbose && PrintMiscellaneous ) {
3052 reserveTimer.stop();
3053 tty->print_cr("reserve_memory of %Ix bytes took " JLONG_FORMAT " ms (" JLONG_FORMAT " ticks)", bytes,
3054 reserveTimer.milliseconds(), reserveTimer.ticks());
3055 }
3056 }
3057 assert(res == NULL || addr == NULL || addr == res,
3058 "Unexpected address from reserve.");
3059
3060 return res;
3061 }
3062
3063 // Reserve memory at an arbitrary address, only if that area is
3064 // available (and not reserved for something else).
3065 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
3066 // Windows os::reserve_memory() fails of the requested address range is
3067 // not avilable.
3068 return reserve_memory(bytes, requested_addr);
3069 }
3070
3071 size_t os::large_page_size() {
3072 return _large_page_size;
3073 }
3074
3075 bool os::can_commit_large_page_memory() {
3076 // Windows only uses large page memory when the entire region is reserved
3077 // and committed in a single VirtualAlloc() call. This may change in the
3078 // future, but with Windows 2003 it's not possible to commit on demand.
3079 return false;
3080 }
3081
3082 bool os::can_execute_large_page_memory() {
3083 return true;
3084 }
3085
3086 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
3087
3088 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
3089 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
3090
3091 // with large pages, there are two cases where we need to use Individual Allocation
3092 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003)
3093 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page
3094 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) {
3095 if (TracePageSizes && Verbose) {
3096 tty->print_cr("Reserving large pages individually.");
3097 }
3098 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError);
3099 if (p_buf == NULL) {
3100 // give an appropriate warning message
3101 if (UseNUMAInterleaving) {
3102 warning("NUMA large page allocation failed, UseLargePages flag ignored");
3103 }
3104 if (UseLargePagesIndividualAllocation) {
3105 warning("Individually allocated large pages failed, "
3106 "use -XX:-UseLargePagesIndividualAllocation to turn off");
3107 }
3108 return NULL;
3109 }
3110
3111 return p_buf;
3112
3113 } else {
3114 // normal policy just allocate it all at once
3115 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
3116 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot);
3117 if (res != NULL) {
3118 address pc = CALLER_PC;
3119 MemTracker::record_virtual_memory_reserve((address)res, bytes, pc);
3120 MemTracker::record_virtual_memory_commit((address)res, bytes, pc);
3121 }
3122
3123 return res;
3124 }
3125 }
3126
3127 bool os::release_memory_special(char* base, size_t bytes) {
3128 assert(base != NULL, "Sanity check");
3129 // Memory allocated via reserve_memory_special() is committed
3130 MemTracker::record_virtual_memory_uncommit((address)base, bytes);
3131 return release_memory(base, bytes);
3132 }
3133
3134 void os::print_statistics() {
3135 }
3136
3137 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
3138 if (bytes == 0) {
3139 // Don't bother the OS with noops.
3140 return true;
3141 }
3142 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries");
3143 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
3144 // Don't attempt to print anything if the OS call fails. We're
3145 // probably low on resources, so the print itself may cause crashes.
3146
3147 // unless we have NUMAInterleaving enabled, the range of a commit
3148 // is always within a reserve covered by a single VirtualAlloc
3149 // in that case we can just do a single commit for the requested size
3150 if (!UseNUMAInterleaving) {
3151 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false;
3152 if (exec) {
3153 DWORD oldprot;
3154 // Windows doc says to use VirtualProtect to get execute permissions
3155 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false;
3156 }
3157 return true;
3158 } else {
3159
3160 // when NUMAInterleaving is enabled, the commit might cover a range that
3161 // came from multiple VirtualAlloc reserves (using allocate_pages_individually).
3162 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery
3163 // returns represents the number of bytes that can be committed in one step.
3164 size_t bytes_remaining = bytes;
3165 char * next_alloc_addr = addr;
3166 while (bytes_remaining > 0) {
3167 MEMORY_BASIC_INFORMATION alloc_info;
3168 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info));
3169 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize);
3170 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL)
3171 return false;
3172 if (exec) {
3173 DWORD oldprot;
3174 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot))
3175 return false;
3176 }
3177 bytes_remaining -= bytes_to_rq;
3178 next_alloc_addr += bytes_to_rq;
3179 }
3180 }
3181 // if we made it this far, return true
3182 return true;
3183 }
3184
3185 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint,
3186 bool exec) {
3187 return commit_memory(addr, size, exec);
3188 }
3189
3190 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
3191 if (bytes == 0) {
3192 // Don't bother the OS with noops.
3193 return true;
3194 }
3195 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries");
3196 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks");
3197 return (VirtualFree(addr, bytes, MEM_DECOMMIT) != 0);
3198 }
3199
3200 bool os::pd_release_memory(char* addr, size_t bytes) {
3201 return VirtualFree(addr, 0, MEM_RELEASE) != 0;
3202 }
3203
3204 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
3205 return os::commit_memory(addr, size);
3206 }
3207
3208 bool os::remove_stack_guard_pages(char* addr, size_t size) {
3209 return os::uncommit_memory(addr, size);
3210 }
3211
3212 // Set protections specified
3213 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3214 bool is_committed) {
3215 unsigned int p = 0;
3216 switch (prot) {
3217 case MEM_PROT_NONE: p = PAGE_NOACCESS; break;
3218 case MEM_PROT_READ: p = PAGE_READONLY; break;
3219 case MEM_PROT_RW: p = PAGE_READWRITE; break;
3220 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break;
3221 default:
3222 ShouldNotReachHere();
3223 }
3224
3225 DWORD old_status;
3226
3227 // Strange enough, but on Win32 one can change protection only for committed
3228 // memory, not a big deal anyway, as bytes less or equal than 64K
3229 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) {
3230 fatal("cannot commit protection page");
3231 }
3232 // One cannot use os::guard_memory() here, as on Win32 guard page
3233 // have different (one-shot) semantics, from MSDN on PAGE_GUARD:
3234 //
3235 // Pages in the region become guard pages. Any attempt to access a guard page
3236 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off
3237 // the guard page status. Guard pages thus act as a one-time access alarm.
3238 return VirtualProtect(addr, bytes, p, &old_status) != 0;
3239 }
3240
3241 bool os::guard_memory(char* addr, size_t bytes) {
3242 DWORD old_status;
3243 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0;
3244 }
3245
3246 bool os::unguard_memory(char* addr, size_t bytes) {
3247 DWORD old_status;
3248 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0;
3249 }
3250
3251 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
3252 void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { }
3253 void os::numa_make_global(char *addr, size_t bytes) { }
3254 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { }
3255 bool os::numa_topology_changed() { return false; }
3256 size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); }
3257 int os::numa_get_group_id() { return 0; }
3258 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
3259 if (numa_node_list_holder.get_count() == 0 && size > 0) {
3260 // Provide an answer for UMA systems
3261 ids[0] = 0;
3262 return 1;
3263 } else {
3264 // check for size bigger than actual groups_num
3265 size = MIN2(size, numa_get_groups_num());
3266 for (int i = 0; i < (int)size; i++) {
3267 ids[i] = numa_node_list_holder.get_node_list_entry(i);
3268 }
3269 return size;
3270 }
3271 }
3272
3273 bool os::get_page_info(char *start, page_info* info) {
3274 return false;
3275 }
3276
3277 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
3278 return end;
3279 }
3280
3281 char* os::non_memory_address_word() {
3282 // Must never look like an address returned by reserve_memory,
3283 // even in its subfields (as defined by the CPU immediate fields,
3284 // if the CPU splits constants across multiple instructions).
3285 return (char*)-1;
3286 }
3287
3288 #define MAX_ERROR_COUNT 100
3289 #define SYS_THREAD_ERROR 0xffffffffUL
3290
3291 void os::pd_start_thread(Thread* thread) {
3292 DWORD ret = ResumeThread(thread->osthread()->thread_handle());
3293 // Returns previous suspend state:
3294 // 0: Thread was not suspended
3295 // 1: Thread is running now
3296 // >1: Thread is still suspended.
3297 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back
3298 }
3299
3300 class HighResolutionInterval {
3301 // The default timer resolution seems to be 10 milliseconds.
3302 // (Where is this written down?)
3303 // If someone wants to sleep for only a fraction of the default,
3304 // then we set the timer resolution down to 1 millisecond for
3305 // the duration of their interval.
3306 // We carefully set the resolution back, since otherwise we
3307 // seem to incur an overhead (3%?) that we don't need.
3308 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time.
3309 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod().
3310 // Alternatively, we could compute the relative error (503/500 = .6%) and only use
3311 // timeBeginPeriod() if the relative error exceeded some threshold.
3312 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and
3313 // to decreased efficiency related to increased timer "tick" rates. We want to minimize
3314 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high
3315 // resolution timers running.
3316 private:
3317 jlong resolution;
3318 public:
3319 HighResolutionInterval(jlong ms) {
3320 resolution = ms % 10L;
3321 if (resolution != 0) {
3322 MMRESULT result = timeBeginPeriod(1L);
3323 }
3324 }
3325 ~HighResolutionInterval() {
3326 if (resolution != 0) {
3327 MMRESULT result = timeEndPeriod(1L);
3328 }
3329 resolution = 0L;
3330 }
3331 };
3332
3333 int os::sleep(Thread* thread, jlong ms, bool interruptable) {
3334 jlong limit = (jlong) MAXDWORD;
3335
3336 while(ms > limit) {
3337 int res;
3338 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT)
3339 return res;
3340 ms -= limit;
3341 }
3342
3343 assert(thread == Thread::current(), "thread consistency check");
3344 OSThread* osthread = thread->osthread();
3345 OSThreadWaitState osts(osthread, false /* not Object.wait() */);
3346 int result;
3347 if (interruptable) {
3348 assert(thread->is_Java_thread(), "must be java thread");
3349 JavaThread *jt = (JavaThread *) thread;
3350 ThreadBlockInVM tbivm(jt);
3351
3352 jt->set_suspend_equivalent();
3353 // cleared by handle_special_suspend_equivalent_condition() or
3354 // java_suspend_self() via check_and_wait_while_suspended()
3355
3356 HANDLE events[1];
3357 events[0] = osthread->interrupt_event();
3358 HighResolutionInterval *phri=NULL;
3359 if(!ForceTimeHighResolution)
3360 phri = new HighResolutionInterval( ms );
3361 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) {
3362 result = OS_TIMEOUT;
3363 } else {
3364 ResetEvent(osthread->interrupt_event());
3365 osthread->set_interrupted(false);
3366 result = OS_INTRPT;
3367 }
3368 delete phri; //if it is NULL, harmless
3369
3370 // were we externally suspended while we were waiting?
3371 jt->check_and_wait_while_suspended();
3372 } else {
3373 assert(!thread->is_Java_thread(), "must not be java thread");
3374 Sleep((long) ms);
3375 result = OS_TIMEOUT;
3376 }
3377 return result;
3378 }
3379
3380 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3381 void os::infinite_sleep() {
3382 while (true) { // sleep forever ...
3383 Sleep(100000); // ... 100 seconds at a time
3384 }
3385 }
3386
3387 typedef BOOL (WINAPI * STTSignature)(void) ;
3388
3389 os::YieldResult os::NakedYield() {
3390 // Use either SwitchToThread() or Sleep(0)
3391 // Consider passing back the return value from SwitchToThread().
3392 if (os::Kernel32Dll::SwitchToThreadAvailable()) {
3393 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ;
3394 } else {
3395 Sleep(0);
3396 }
3397 return os::YIELD_UNKNOWN ;
3398 }
3399
3400 void os::yield() { os::NakedYield(); }
3401
3402 void os::yield_all(int attempts) {
3403 // Yields to all threads, including threads with lower priorities
3404 Sleep(1);
3405 }
3406
3407 // Win32 only gives you access to seven real priorities at a time,
3408 // so we compress Java's ten down to seven. It would be better
3409 // if we dynamically adjusted relative priorities.
3410
3411 int os::java_to_os_priority[CriticalPriority + 1] = {
3412 THREAD_PRIORITY_IDLE, // 0 Entry should never be used
3413 THREAD_PRIORITY_LOWEST, // 1 MinPriority
3414 THREAD_PRIORITY_LOWEST, // 2
3415 THREAD_PRIORITY_BELOW_NORMAL, // 3
3416 THREAD_PRIORITY_BELOW_NORMAL, // 4
3417 THREAD_PRIORITY_NORMAL, // 5 NormPriority
3418 THREAD_PRIORITY_NORMAL, // 6
3419 THREAD_PRIORITY_ABOVE_NORMAL, // 7
3420 THREAD_PRIORITY_ABOVE_NORMAL, // 8
3421 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
3422 THREAD_PRIORITY_HIGHEST, // 10 MaxPriority
3423 THREAD_PRIORITY_HIGHEST // 11 CriticalPriority
3424 };
3425
3426 int prio_policy1[CriticalPriority + 1] = {
3427 THREAD_PRIORITY_IDLE, // 0 Entry should never be used
3428 THREAD_PRIORITY_LOWEST, // 1 MinPriority
3429 THREAD_PRIORITY_LOWEST, // 2
3430 THREAD_PRIORITY_BELOW_NORMAL, // 3
3431 THREAD_PRIORITY_BELOW_NORMAL, // 4
3432 THREAD_PRIORITY_NORMAL, // 5 NormPriority
3433 THREAD_PRIORITY_ABOVE_NORMAL, // 6
3434 THREAD_PRIORITY_ABOVE_NORMAL, // 7
3435 THREAD_PRIORITY_HIGHEST, // 8
3436 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
3437 THREAD_PRIORITY_TIME_CRITICAL, // 10 MaxPriority
3438 THREAD_PRIORITY_TIME_CRITICAL // 11 CriticalPriority
3439 };
3440
3441 static int prio_init() {
3442 // If ThreadPriorityPolicy is 1, switch tables
3443 if (ThreadPriorityPolicy == 1) {
3444 int i;
3445 for (i = 0; i < CriticalPriority + 1; i++) {
3446 os::java_to_os_priority[i] = prio_policy1[i];
3447 }
3448 }
3449 if (UseCriticalJavaThreadPriority) {
3450 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority] ;
3451 }
3452 return 0;
3453 }
3454
3455 OSReturn os::set_native_priority(Thread* thread, int priority) {
3456 if (!UseThreadPriorities) return OS_OK;
3457 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0;
3458 return ret ? OS_OK : OS_ERR;
3459 }
3460
3461 OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) {
3462 if ( !UseThreadPriorities ) {
3463 *priority_ptr = java_to_os_priority[NormPriority];
3464 return OS_OK;
3465 }
3466 int os_prio = GetThreadPriority(thread->osthread()->thread_handle());
3467 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) {
3468 assert(false, "GetThreadPriority failed");
3469 return OS_ERR;
3470 }
3471 *priority_ptr = os_prio;
3472 return OS_OK;
3473 }
3474
3475
3476 // Hint to the underlying OS that a task switch would not be good.
3477 // Void return because it's a hint and can fail.
3478 void os::hint_no_preempt() {}
3479
3480 void os::interrupt(Thread* thread) {
3481 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
3482 "possibility of dangling Thread pointer");
3483
3484 OSThread* osthread = thread->osthread();
3485 osthread->set_interrupted(true);
3486 // More than one thread can get here with the same value of osthread,
3487 // resulting in multiple notifications. We do, however, want the store
3488 // to interrupted() to be visible to other threads before we post
3489 // the interrupt event.
3490 OrderAccess::release();
3491 SetEvent(osthread->interrupt_event());
3492 // For JSR166: unpark after setting status
3493 if (thread->is_Java_thread())
3494 ((JavaThread*)thread)->parker()->unpark();
3495
3496 ParkEvent * ev = thread->_ParkEvent ;
3497 if (ev != NULL) ev->unpark() ;
3498
3499 }
3500
3501
3502 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
3503 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
3504 "possibility of dangling Thread pointer");
3505
3506 OSThread* osthread = thread->osthread();
3507 bool interrupted = osthread->interrupted();
3508 // There is no synchronization between the setting of the interrupt
3509 // and it being cleared here. It is critical - see 6535709 - that
3510 // we only clear the interrupt state, and reset the interrupt event,
3511 // if we are going to report that we were indeed interrupted - else
3512 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups
3513 // depending on the timing
3514 if (interrupted && clear_interrupted) {
3515 osthread->set_interrupted(false);
3516 ResetEvent(osthread->interrupt_event());
3517 } // Otherwise leave the interrupted state alone
3518
3519 return interrupted;
3520 }
3521
3522 // Get's a pc (hint) for a running thread. Currently used only for profiling.
3523 ExtendedPC os::get_thread_pc(Thread* thread) {
3524 CONTEXT context;
3525 context.ContextFlags = CONTEXT_CONTROL;
3526 HANDLE handle = thread->osthread()->thread_handle();
3527 #ifdef _M_IA64
3528 assert(0, "Fix get_thread_pc");
3529 return ExtendedPC(NULL);
3530 #else
3531 if (GetThreadContext(handle, &context)) {
3532 #ifdef _M_AMD64
3533 return ExtendedPC((address) context.Rip);
3534 #else
3535 return ExtendedPC((address) context.Eip);
3536 #endif
3537 } else {
3538 return ExtendedPC(NULL);
3539 }
3540 #endif
3541 }
3542
3543 // GetCurrentThreadId() returns DWORD
3544 intx os::current_thread_id() { return GetCurrentThreadId(); }
3545
3546 static int _initial_pid = 0;
3547
3548 int os::current_process_id()
3549 {
3550 return (_initial_pid ? _initial_pid : _getpid());
3551 }
3552
3553 int os::win32::_vm_page_size = 0;
3554 int os::win32::_vm_allocation_granularity = 0;
3555 int os::win32::_processor_type = 0;
3556 // Processor level is not available on non-NT systems, use vm_version instead
3557 int os::win32::_processor_level = 0;
3558 julong os::win32::_physical_memory = 0;
3559 size_t os::win32::_default_stack_size = 0;
3560
3561 intx os::win32::_os_thread_limit = 0;
3562 volatile intx os::win32::_os_thread_count = 0;
3563
3564 bool os::win32::_is_nt = false;
3565 bool os::win32::_is_windows_2003 = false;
3566 bool os::win32::_is_windows_server = false;
3567
3568 void os::win32::initialize_system_info() {
3569 SYSTEM_INFO si;
3570 GetSystemInfo(&si);
3571 _vm_page_size = si.dwPageSize;
3572 _vm_allocation_granularity = si.dwAllocationGranularity;
3573 _processor_type = si.dwProcessorType;
3574 _processor_level = si.wProcessorLevel;
3575 set_processor_count(si.dwNumberOfProcessors);
3576
3577 MEMORYSTATUSEX ms;
3578 ms.dwLength = sizeof(ms);
3579
3580 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual,
3581 // dwMemoryLoad (% of memory in use)
3582 GlobalMemoryStatusEx(&ms);
3583 _physical_memory = ms.ullTotalPhys;
3584
3585 OSVERSIONINFOEX oi;
3586 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
3587 GetVersionEx((OSVERSIONINFO*)&oi);
3588 switch(oi.dwPlatformId) {
3589 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break;
3590 case VER_PLATFORM_WIN32_NT:
3591 _is_nt = true;
3592 {
3593 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion;
3594 if (os_vers == 5002) {
3595 _is_windows_2003 = true;
3596 }
3597 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER ||
3598 oi.wProductType == VER_NT_SERVER) {
3599 _is_windows_server = true;
3600 }
3601 }
3602 break;
3603 default: fatal("Unknown platform");
3604 }
3605
3606 _default_stack_size = os::current_stack_size();
3607 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size");
3608 assert((_default_stack_size & (_vm_page_size - 1)) == 0,
3609 "stack size not a multiple of page size");
3610
3611 initialize_performance_counter();
3612
3613 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is
3614 // known to deadlock the system, if the VM issues to thread operations with
3615 // a too high frequency, e.g., such as changing the priorities.
3616 // The 6000 seems to work well - no deadlocks has been notices on the test
3617 // programs that we have seen experience this problem.
3618 if (!os::win32::is_nt()) {
3619 StarvationMonitorInterval = 6000;
3620 }
3621 }
3622
3623
3624 HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) {
3625 char path[MAX_PATH];
3626 DWORD size;
3627 DWORD pathLen = (DWORD)sizeof(path);
3628 HINSTANCE result = NULL;
3629
3630 // only allow library name without path component
3631 assert(strchr(name, '\\') == NULL, "path not allowed");
3632 assert(strchr(name, ':') == NULL, "path not allowed");
3633 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) {
3634 jio_snprintf(ebuf, ebuflen,
3635 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name);
3636 return NULL;
3637 }
3638
3639 // search system directory
3640 if ((size = GetSystemDirectory(path, pathLen)) > 0) {
3641 strcat(path, "\\");
3642 strcat(path, name);
3643 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
3644 return result;
3645 }
3646 }
3647
3648 // try Windows directory
3649 if ((size = GetWindowsDirectory(path, pathLen)) > 0) {
3650 strcat(path, "\\");
3651 strcat(path, name);
3652 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
3653 return result;
3654 }
3655 }
3656
3657 jio_snprintf(ebuf, ebuflen,
3658 "os::win32::load_windows_dll() cannot load %s from system directories.", name);
3659 return NULL;
3660 }
3661
3662 void os::win32::setmode_streams() {
3663 _setmode(_fileno(stdin), _O_BINARY);
3664 _setmode(_fileno(stdout), _O_BINARY);
3665 _setmode(_fileno(stderr), _O_BINARY);
3666 }
3667
3668
3669 bool os::is_debugger_attached() {
3670 return IsDebuggerPresent() ? true : false;
3671 }
3672
3673
3674 void os::wait_for_keypress_at_exit(void) {
3675 if (PauseAtExit) {
3676 fprintf(stderr, "Press any key to continue...\n");
3677 fgetc(stdin);
3678 }
3679 }
3680
3681
3682 int os::message_box(const char* title, const char* message) {
3683 int result = MessageBox(NULL, message, title,
3684 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY);
3685 return result == IDYES;
3686 }
3687
3688 int os::allocate_thread_local_storage() {
3689 return TlsAlloc();
3690 }
3691
3692
3693 void os::free_thread_local_storage(int index) {
3694 TlsFree(index);
3695 }
3696
3697
3698 void os::thread_local_storage_at_put(int index, void* value) {
3699 TlsSetValue(index, value);
3700 assert(thread_local_storage_at(index) == value, "Just checking");
3701 }
3702
3703
3704 void* os::thread_local_storage_at(int index) {
3705 return TlsGetValue(index);
3706 }
3707
3708
3709 #ifndef PRODUCT
3710 #ifndef _WIN64
3711 // Helpers to check whether NX protection is enabled
3712 int nx_exception_filter(_EXCEPTION_POINTERS *pex) {
3713 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
3714 pex->ExceptionRecord->NumberParameters > 0 &&
3715 pex->ExceptionRecord->ExceptionInformation[0] ==
3716 EXCEPTION_INFO_EXEC_VIOLATION) {
3717 return EXCEPTION_EXECUTE_HANDLER;
3718 }
3719 return EXCEPTION_CONTINUE_SEARCH;
3720 }
3721
3722 void nx_check_protection() {
3723 // If NX is enabled we'll get an exception calling into code on the stack
3724 char code[] = { (char)0xC3 }; // ret
3725 void *code_ptr = (void *)code;
3726 __try {
3727 __asm call code_ptr
3728 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) {
3729 tty->print_raw_cr("NX protection detected.");
3730 }
3731 }
3732 #endif // _WIN64
3733 #endif // PRODUCT
3734
3735 // this is called _before_ the global arguments have been parsed
3736 void os::init(void) {
3737 _initial_pid = _getpid();
3738
3739 init_random(1234567);
3740
3741 win32::initialize_system_info();
3742 win32::setmode_streams();
3743 init_page_sizes((size_t) win32::vm_page_size());
3744
3745 // For better scalability on MP systems (must be called after initialize_system_info)
3746 #ifndef PRODUCT
3747 if (is_MP()) {
3748 NoYieldsInMicrolock = true;
3749 }
3750 #endif
3751 // This may be overridden later when argument processing is done.
3752 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation,
3753 os::win32::is_windows_2003());
3754
3755 // Initialize main_process and main_thread
3756 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle
3757 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process,
3758 &main_thread, THREAD_ALL_ACCESS, false, 0)) {
3759 fatal("DuplicateHandle failed\n");
3760 }
3761 main_thread_id = (int) GetCurrentThreadId();
3762 }
3763
3764 // To install functions for atexit processing
3765 extern "C" {
3766 static void perfMemory_exit_helper() {
3767 perfMemory_exit();
3768 }
3769 }
3770
3771 // this is called _after_ the global arguments have been parsed
3772 jint os::init_2(void) {
3773 // Allocate a single page and mark it as readable for safepoint polling
3774 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY);
3775 guarantee( polling_page != NULL, "Reserve Failed for polling page");
3776
3777 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY);
3778 guarantee( return_page != NULL, "Commit Failed for polling page");
3779
3780 os::set_polling_page( polling_page );
3781
3782 #ifndef PRODUCT
3783 if( Verbose && PrintMiscellaneous )
3784 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
3785 #endif
3786
3787 if (!UseMembar) {
3788 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
3789 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
3790
3791 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
3792 guarantee( return_page != NULL, "Commit Failed for memory serialize page");
3793
3794 os::set_memory_serialize_page( mem_serialize_page );
3795
3796 #ifndef PRODUCT
3797 if(Verbose && PrintMiscellaneous)
3798 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
3799 #endif
3800 }
3801
3802 os::large_page_init();
3803
3804 // Setup Windows Exceptions
3805
3806 // for debugging float code generation bugs
3807 if (ForceFloatExceptions) {
3808 #ifndef _WIN64
3809 static long fp_control_word = 0;
3810 __asm { fstcw fp_control_word }
3811 // see Intel PPro Manual, Vol. 2, p 7-16
3812 const long precision = 0x20;
3813 const long underflow = 0x10;
3814 const long overflow = 0x08;
3815 const long zero_div = 0x04;
3816 const long denorm = 0x02;
3817 const long invalid = 0x01;
3818 fp_control_word |= invalid;
3819 __asm { fldcw fp_control_word }
3820 #endif
3821 }
3822
3823 // If stack_commit_size is 0, windows will reserve the default size,
3824 // but only commit a small portion of it.
3825 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size());
3826 size_t default_reserve_size = os::win32::default_stack_size();
3827 size_t actual_reserve_size = stack_commit_size;
3828 if (stack_commit_size < default_reserve_size) {
3829 // If stack_commit_size == 0, we want this too
3830 actual_reserve_size = default_reserve_size;
3831 }
3832
3833 // Check minimum allowable stack size for thread creation and to initialize
3834 // the java system classes, including StackOverflowError - depends on page
3835 // size. Add a page for compiler2 recursion in main thread.
3836 // Add in 2*BytesPerWord times page size to account for VM stack during
3837 // class initialization depending on 32 or 64 bit VM.
3838 size_t min_stack_allowed =
3839 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
3840 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size();
3841 if (actual_reserve_size < min_stack_allowed) {
3842 tty->print_cr("\nThe stack size specified is too small, "
3843 "Specify at least %dk",
3844 min_stack_allowed / K);
3845 return JNI_ERR;
3846 }
3847
3848 JavaThread::set_stack_size_at_create(stack_commit_size);
3849
3850 // Calculate theoretical max. size of Threads to guard gainst artifical
3851 // out-of-memory situations, where all available address-space has been
3852 // reserved by thread stacks.
3853 assert(actual_reserve_size != 0, "Must have a stack");
3854
3855 // Calculate the thread limit when we should start doing Virtual Memory
3856 // banging. Currently when the threads will have used all but 200Mb of space.
3857 //
3858 // TODO: consider performing a similar calculation for commit size instead
3859 // as reserve size, since on a 64-bit platform we'll run into that more
3860 // often than running out of virtual memory space. We can use the
3861 // lower value of the two calculations as the os_thread_limit.
3862 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K);
3863 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size);
3864
3865 // at exit methods are called in the reverse order of their registration.
3866 // there is no limit to the number of functions registered. atexit does
3867 // not set errno.
3868
3869 if (PerfAllowAtExitRegistration) {
3870 // only register atexit functions if PerfAllowAtExitRegistration is set.
3871 // atexit functions can be delayed until process exit time, which
3872 // can be problematic for embedded VM situations. Embedded VMs should
3873 // call DestroyJavaVM() to assure that VM resources are released.
3874
3875 // note: perfMemory_exit_helper atexit function may be removed in
3876 // the future if the appropriate cleanup code can be added to the
3877 // VM_Exit VMOperation's doit method.
3878 if (atexit(perfMemory_exit_helper) != 0) {
3879 warning("os::init_2 atexit(perfMemory_exit_helper) failed");
3880 }
3881 }
3882
3883 #ifndef _WIN64
3884 // Print something if NX is enabled (win32 on AMD64)
3885 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection());
3886 #endif
3887
3888 // initialize thread priority policy
3889 prio_init();
3890
3891 if (UseNUMA && !ForceNUMA) {
3892 UseNUMA = false; // We don't fully support this yet
3893 }
3894
3895 if (UseNUMAInterleaving) {
3896 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag
3897 bool success = numa_interleaving_init();
3898 if (!success) UseNUMAInterleaving = false;
3899 }
3900
3901 return JNI_OK;
3902 }
3903
3904 void os::init_3(void) {
3905 return;
3906 }
3907
3908 // Mark the polling page as unreadable
3909 void os::make_polling_page_unreadable(void) {
3910 DWORD old_status;
3911 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) )
3912 fatal("Could not disable polling page");
3913 };
3914
3915 // Mark the polling page as readable
3916 void os::make_polling_page_readable(void) {
3917 DWORD old_status;
3918 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) )
3919 fatal("Could not enable polling page");
3920 };
3921
3922
3923 int os::stat(const char *path, struct stat *sbuf) {
3924 char pathbuf[MAX_PATH];
3925 if (strlen(path) > MAX_PATH - 1) {
3926 errno = ENAMETOOLONG;
3927 return -1;
3928 }
3929 os::native_path(strcpy(pathbuf, path));
3930 int ret = ::stat(pathbuf, sbuf);
3931 if (sbuf != NULL && UseUTCFileTimestamp) {
3932 // Fix for 6539723. st_mtime returned from stat() is dependent on
3933 // the system timezone and so can return different values for the
3934 // same file if/when daylight savings time changes. This adjustment
3935 // makes sure the same timestamp is returned regardless of the TZ.
3936 //
3937 // See:
3938 // http://msdn.microsoft.com/library/
3939 // default.asp?url=/library/en-us/sysinfo/base/
3940 // time_zone_information_str.asp
3941 // and
3942 // http://msdn.microsoft.com/library/default.asp?url=
3943 // /library/en-us/sysinfo/base/settimezoneinformation.asp
3944 //
3945 // NOTE: there is a insidious bug here: If the timezone is changed
3946 // after the call to stat() but before 'GetTimeZoneInformation()', then
3947 // the adjustment we do here will be wrong and we'll return the wrong
3948 // value (which will likely end up creating an invalid class data
3949 // archive). Absent a better API for this, or some time zone locking
3950 // mechanism, we'll have to live with this risk.
3951 TIME_ZONE_INFORMATION tz;
3952 DWORD tzid = GetTimeZoneInformation(&tz);
3953 int daylightBias =
3954 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias;
3955 sbuf->st_mtime += (tz.Bias + daylightBias) * 60;
3956 }
3957 return ret;
3958 }
3959
3960
3961 #define FT2INT64(ft) \
3962 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime))
3963
3964
3965 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
3966 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
3967 // of a thread.
3968 //
3969 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns
3970 // the fast estimate available on the platform.
3971
3972 // current_thread_cpu_time() is not optimized for Windows yet
3973 jlong os::current_thread_cpu_time() {
3974 // return user + sys since the cost is the same
3975 return os::thread_cpu_time(Thread::current(), true /* user+sys */);
3976 }
3977
3978 jlong os::thread_cpu_time(Thread* thread) {
3979 // consistent with what current_thread_cpu_time() returns.
3980 return os::thread_cpu_time(thread, true /* user+sys */);
3981 }
3982
3983 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
3984 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
3985 }
3986
3987 jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) {
3988 // This code is copy from clasic VM -> hpi::sysThreadCPUTime
3989 // If this function changes, os::is_thread_cpu_time_supported() should too
3990 if (os::win32::is_nt()) {
3991 FILETIME CreationTime;
3992 FILETIME ExitTime;
3993 FILETIME KernelTime;
3994 FILETIME UserTime;
3995
3996 if ( GetThreadTimes(thread->osthread()->thread_handle(),
3997 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
3998 return -1;
3999 else
4000 if (user_sys_cpu_time) {
4001 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100;
4002 } else {
4003 return FT2INT64(UserTime) * 100;
4004 }
4005 } else {
4006 return (jlong) timeGetTime() * 1000000;
4007 }
4008 }
4009
4010 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
4011 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
4012 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
4013 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
4014 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
4015 }
4016
4017 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
4018 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
4019 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
4020 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
4021 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
4022 }
4023
4024 bool os::is_thread_cpu_time_supported() {
4025 // see os::thread_cpu_time
4026 if (os::win32::is_nt()) {
4027 FILETIME CreationTime;
4028 FILETIME ExitTime;
4029 FILETIME KernelTime;
4030 FILETIME UserTime;
4031
4032 if ( GetThreadTimes(GetCurrentThread(),
4033 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
4034 return false;
4035 else
4036 return true;
4037 } else {
4038 return false;
4039 }
4040 }
4041
4042 // Windows does't provide a loadavg primitive so this is stubbed out for now.
4043 // It does have primitives (PDH API) to get CPU usage and run queue length.
4044 // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length"
4045 // If we wanted to implement loadavg on Windows, we have a few options:
4046 //
4047 // a) Query CPU usage and run queue length and "fake" an answer by
4048 // returning the CPU usage if it's under 100%, and the run queue
4049 // length otherwise. It turns out that querying is pretty slow
4050 // on Windows, on the order of 200 microseconds on a fast machine.
4051 // Note that on the Windows the CPU usage value is the % usage
4052 // since the last time the API was called (and the first call
4053 // returns 100%), so we'd have to deal with that as well.
4054 //
4055 // b) Sample the "fake" answer using a sampling thread and store
4056 // the answer in a global variable. The call to loadavg would
4057 // just return the value of the global, avoiding the slow query.
4058 //
4059 // c) Sample a better answer using exponential decay to smooth the
4060 // value. This is basically the algorithm used by UNIX kernels.
4061 //
4062 // Note that sampling thread starvation could affect both (b) and (c).
4063 int os::loadavg(double loadavg[], int nelem) {
4064 return -1;
4065 }
4066
4067
4068 // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield()
4069 bool os::dont_yield() {
4070 return DontYieldALot;
4071 }
4072
4073 // This method is a slightly reworked copy of JDK's sysOpen
4074 // from src/windows/hpi/src/sys_api_md.c
4075
4076 int os::open(const char *path, int oflag, int mode) {
4077 char pathbuf[MAX_PATH];
4078
4079 if (strlen(path) > MAX_PATH - 1) {
4080 errno = ENAMETOOLONG;
4081 return -1;
4082 }
4083 os::native_path(strcpy(pathbuf, path));
4084 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode);
4085 }
4086
4087 // Is a (classpath) directory empty?
4088 bool os::dir_is_empty(const char* path) {
4089 WIN32_FIND_DATA fd;
4090 HANDLE f = FindFirstFile(path, &fd);
4091 if (f == INVALID_HANDLE_VALUE) {
4092 return true;
4093 }
4094 FindClose(f);
4095 return false;
4096 }
4097
4098 // create binary file, rewriting existing file if required
4099 int os::create_binary_file(const char* path, bool rewrite_existing) {
4100 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY;
4101 if (!rewrite_existing) {
4102 oflags |= _O_EXCL;
4103 }
4104 return ::open(path, oflags, _S_IREAD | _S_IWRITE);
4105 }
4106
4107 // return current position of file pointer
4108 jlong os::current_file_offset(int fd) {
4109 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR);
4110 }
4111
4112 // move file pointer to the specified offset
4113 jlong os::seek_to_file_offset(int fd, jlong offset) {
4114 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET);
4115 }
4116
4117
4118 jlong os::lseek(int fd, jlong offset, int whence) {
4119 return (jlong) ::_lseeki64(fd, offset, whence);
4120 }
4121
4122 // This method is a slightly reworked copy of JDK's sysNativePath
4123 // from src/windows/hpi/src/path_md.c
4124
4125 /* Convert a pathname to native format. On win32, this involves forcing all
4126 separators to be '\\' rather than '/' (both are legal inputs, but Win95
4127 sometimes rejects '/') and removing redundant separators. The input path is
4128 assumed to have been converted into the character encoding used by the local
4129 system. Because this might be a double-byte encoding, care is taken to
4130 treat double-byte lead characters correctly.
4131
4132 This procedure modifies the given path in place, as the result is never
4133 longer than the original. There is no error return; this operation always
4134 succeeds. */
4135 char * os::native_path(char *path) {
4136 char *src = path, *dst = path, *end = path;
4137 char *colon = NULL; /* If a drive specifier is found, this will
4138 point to the colon following the drive
4139 letter */
4140
4141 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */
4142 assert(((!::IsDBCSLeadByte('/'))
4143 && (!::IsDBCSLeadByte('\\'))
4144 && (!::IsDBCSLeadByte(':'))),
4145 "Illegal lead byte");
4146
4147 /* Check for leading separators */
4148 #define isfilesep(c) ((c) == '/' || (c) == '\\')
4149 while (isfilesep(*src)) {
4150 src++;
4151 }
4152
4153 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') {
4154 /* Remove leading separators if followed by drive specifier. This
4155 hack is necessary to support file URLs containing drive
4156 specifiers (e.g., "file://c:/path"). As a side effect,
4157 "/c:/path" can be used as an alternative to "c:/path". */
4158 *dst++ = *src++;
4159 colon = dst;
4160 *dst++ = ':';
4161 src++;
4162 } else {
4163 src = path;
4164 if (isfilesep(src[0]) && isfilesep(src[1])) {
4165 /* UNC pathname: Retain first separator; leave src pointed at
4166 second separator so that further separators will be collapsed
4167 into the second separator. The result will be a pathname
4168 beginning with "\\\\" followed (most likely) by a host name. */
4169 src = dst = path + 1;
4170 path[0] = '\\'; /* Force first separator to '\\' */
4171 }
4172 }
4173
4174 end = dst;
4175
4176 /* Remove redundant separators from remainder of path, forcing all
4177 separators to be '\\' rather than '/'. Also, single byte space
4178 characters are removed from the end of the path because those
4179 are not legal ending characters on this operating system.
4180 */
4181 while (*src != '\0') {
4182 if (isfilesep(*src)) {
4183 *dst++ = '\\'; src++;
4184 while (isfilesep(*src)) src++;
4185 if (*src == '\0') {
4186 /* Check for trailing separator */
4187 end = dst;
4188 if (colon == dst - 2) break; /* "z:\\" */
4189 if (dst == path + 1) break; /* "\\" */
4190 if (dst == path + 2 && isfilesep(path[0])) {
4191 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the
4192 beginning of a UNC pathname. Even though it is not, by
4193 itself, a valid UNC pathname, we leave it as is in order
4194 to be consistent with the path canonicalizer as well
4195 as the win32 APIs, which treat this case as an invalid
4196 UNC pathname rather than as an alias for the root
4197 directory of the current drive. */
4198 break;
4199 }
4200 end = --dst; /* Path does not denote a root directory, so
4201 remove trailing separator */
4202 break;
4203 }
4204 end = dst;
4205 } else {
4206 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */
4207 *dst++ = *src++;
4208 if (*src) *dst++ = *src++;
4209 end = dst;
4210 } else { /* Copy a single-byte character */
4211 char c = *src++;
4212 *dst++ = c;
4213 /* Space is not a legal ending character */
4214 if (c != ' ') end = dst;
4215 }
4216 }
4217 }
4218
4219 *end = '\0';
4220
4221 /* For "z:", add "." to work around a bug in the C runtime library */
4222 if (colon == dst - 1) {
4223 path[2] = '.';
4224 path[3] = '\0';
4225 }
4226
4227 return path;
4228 }
4229
4230 // This code is a copy of JDK's sysSetLength
4231 // from src/windows/hpi/src/sys_api_md.c
4232
4233 int os::ftruncate(int fd, jlong length) {
4234 HANDLE h = (HANDLE)::_get_osfhandle(fd);
4235 long high = (long)(length >> 32);
4236 DWORD ret;
4237
4238 if (h == (HANDLE)(-1)) {
4239 return -1;
4240 }
4241
4242 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN);
4243 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) {
4244 return -1;
4245 }
4246
4247 if (::SetEndOfFile(h) == FALSE) {
4248 return -1;
4249 }
4250
4251 return 0;
4252 }
4253
4254
4255 // This code is a copy of JDK's sysSync
4256 // from src/windows/hpi/src/sys_api_md.c
4257 // except for the legacy workaround for a bug in Win 98
4258
4259 int os::fsync(int fd) {
4260 HANDLE handle = (HANDLE)::_get_osfhandle(fd);
4261
4262 if ( (!::FlushFileBuffers(handle)) &&
4263 (GetLastError() != ERROR_ACCESS_DENIED) ) {
4264 /* from winerror.h */
4265 return -1;
4266 }
4267 return 0;
4268 }
4269
4270 static int nonSeekAvailable(int, long *);
4271 static int stdinAvailable(int, long *);
4272
4273 #define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR)
4274 #define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO)
4275
4276 // This code is a copy of JDK's sysAvailable
4277 // from src/windows/hpi/src/sys_api_md.c
4278
4279 int os::available(int fd, jlong *bytes) {
4280 jlong cur, end;
4281 struct _stati64 stbuf64;
4282
4283 if (::_fstati64(fd, &stbuf64) >= 0) {
4284 int mode = stbuf64.st_mode;
4285 if (S_ISCHR(mode) || S_ISFIFO(mode)) {
4286 int ret;
4287 long lpbytes;
4288 if (fd == 0) {
4289 ret = stdinAvailable(fd, &lpbytes);
4290 } else {
4291 ret = nonSeekAvailable(fd, &lpbytes);
4292 }
4293 (*bytes) = (jlong)(lpbytes);
4294 return ret;
4295 }
4296 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) {
4297 return FALSE;
4298 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) {
4299 return FALSE;
4300 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) {
4301 return FALSE;
4302 }
4303 *bytes = end - cur;
4304 return TRUE;
4305 } else {
4306 return FALSE;
4307 }
4308 }
4309
4310 // This code is a copy of JDK's nonSeekAvailable
4311 // from src/windows/hpi/src/sys_api_md.c
4312
4313 static int nonSeekAvailable(int fd, long *pbytes) {
4314 /* This is used for available on non-seekable devices
4315 * (like both named and anonymous pipes, such as pipes
4316 * connected to an exec'd process).
4317 * Standard Input is a special case.
4318 *
4319 */
4320 HANDLE han;
4321
4322 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) {
4323 return FALSE;
4324 }
4325
4326 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) {
4327 /* PeekNamedPipe fails when at EOF. In that case we
4328 * simply make *pbytes = 0 which is consistent with the
4329 * behavior we get on Solaris when an fd is at EOF.
4330 * The only alternative is to raise an Exception,
4331 * which isn't really warranted.
4332 */
4333 if (::GetLastError() != ERROR_BROKEN_PIPE) {
4334 return FALSE;
4335 }
4336 *pbytes = 0;
4337 }
4338 return TRUE;
4339 }
4340
4341 #define MAX_INPUT_EVENTS 2000
4342
4343 // This code is a copy of JDK's stdinAvailable
4344 // from src/windows/hpi/src/sys_api_md.c
4345
4346 static int stdinAvailable(int fd, long *pbytes) {
4347 HANDLE han;
4348 DWORD numEventsRead = 0; /* Number of events read from buffer */
4349 DWORD numEvents = 0; /* Number of events in buffer */
4350 DWORD i = 0; /* Loop index */
4351 DWORD curLength = 0; /* Position marker */
4352 DWORD actualLength = 0; /* Number of bytes readable */
4353 BOOL error = FALSE; /* Error holder */
4354 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */
4355
4356 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
4357 return FALSE;
4358 }
4359
4360 /* Construct an array of input records in the console buffer */
4361 error = ::GetNumberOfConsoleInputEvents(han, &numEvents);
4362 if (error == 0) {
4363 return nonSeekAvailable(fd, pbytes);
4364 }
4365
4366 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */
4367 if (numEvents > MAX_INPUT_EVENTS) {
4368 numEvents = MAX_INPUT_EVENTS;
4369 }
4370
4371 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD), mtInternal);
4372 if (lpBuffer == NULL) {
4373 return FALSE;
4374 }
4375
4376 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead);
4377 if (error == 0) {
4378 os::free(lpBuffer, mtInternal);
4379 return FALSE;
4380 }
4381
4382 /* Examine input records for the number of bytes available */
4383 for(i=0; i<numEvents; i++) {
4384 if (lpBuffer[i].EventType == KEY_EVENT) {
4385
4386 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *)
4387 &(lpBuffer[i].Event);
4388 if (keyRecord->bKeyDown == TRUE) {
4389 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar);
4390 curLength++;
4391 if (*keyPressed == '\r') {
4392 actualLength = curLength;
4393 }
4394 }
4395 }
4396 }
4397
4398 if(lpBuffer != NULL) {
4399 os::free(lpBuffer, mtInternal);
4400 }
4401
4402 *pbytes = (long) actualLength;
4403 return TRUE;
4404 }
4405
4406 // Map a block of memory.
4407 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4408 char *addr, size_t bytes, bool read_only,
4409 bool allow_exec) {
4410 HANDLE hFile;
4411 char* base;
4412
4413 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
4414 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
4415 if (hFile == NULL) {
4416 if (PrintMiscellaneous && Verbose) {
4417 DWORD err = GetLastError();
4418 tty->print_cr("CreateFile() failed: GetLastError->%ld.", err);
4419 }
4420 return NULL;
4421 }
4422
4423 if (allow_exec) {
4424 // CreateFileMapping/MapViewOfFileEx can't map executable memory
4425 // unless it comes from a PE image (which the shared archive is not.)
4426 // Even VirtualProtect refuses to give execute access to mapped memory
4427 // that was not previously executable.
4428 //
4429 // Instead, stick the executable region in anonymous memory. Yuck.
4430 // Penalty is that ~4 pages will not be shareable - in the future
4431 // we might consider DLLizing the shared archive with a proper PE
4432 // header so that mapping executable + sharing is possible.
4433
4434 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE,
4435 PAGE_READWRITE);
4436 if (base == NULL) {
4437 if (PrintMiscellaneous && Verbose) {
4438 DWORD err = GetLastError();
4439 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err);
4440 }
4441 CloseHandle(hFile);
4442 return NULL;
4443 }
4444
4445 DWORD bytes_read;
4446 OVERLAPPED overlapped;
4447 overlapped.Offset = (DWORD)file_offset;
4448 overlapped.OffsetHigh = 0;
4449 overlapped.hEvent = NULL;
4450 // ReadFile guarantees that if the return value is true, the requested
4451 // number of bytes were read before returning.
4452 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0;
4453 if (!res) {
4454 if (PrintMiscellaneous && Verbose) {
4455 DWORD err = GetLastError();
4456 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err);
4457 }
4458 release_memory(base, bytes);
4459 CloseHandle(hFile);
4460 return NULL;
4461 }
4462 } else {
4463 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0,
4464 NULL /*file_name*/);
4465 if (hMap == NULL) {
4466 if (PrintMiscellaneous && Verbose) {
4467 DWORD err = GetLastError();
4468 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.", err);
4469 }
4470 CloseHandle(hFile);
4471 return NULL;
4472 }
4473
4474 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY;
4475 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset,
4476 (DWORD)bytes, addr);
4477 if (base == NULL) {
4478 if (PrintMiscellaneous && Verbose) {
4479 DWORD err = GetLastError();
4480 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err);
4481 }
4482 CloseHandle(hMap);
4483 CloseHandle(hFile);
4484 return NULL;
4485 }
4486
4487 if (CloseHandle(hMap) == 0) {
4488 if (PrintMiscellaneous && Verbose) {
4489 DWORD err = GetLastError();
4490 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err);
4491 }
4492 CloseHandle(hFile);
4493 return base;
4494 }
4495 }
4496
4497 if (allow_exec) {
4498 DWORD old_protect;
4499 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE;
4500 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0;
4501
4502 if (!res) {
4503 if (PrintMiscellaneous && Verbose) {
4504 DWORD err = GetLastError();
4505 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err);
4506 }
4507 // Don't consider this a hard error, on IA32 even if the
4508 // VirtualProtect fails, we should still be able to execute
4509 CloseHandle(hFile);
4510 return base;
4511 }
4512 }
4513
4514 if (CloseHandle(hFile) == 0) {
4515 if (PrintMiscellaneous && Verbose) {
4516 DWORD err = GetLastError();
4517 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err);
4518 }
4519 return base;
4520 }
4521
4522 return base;
4523 }
4524
4525
4526 // Remap a block of memory.
4527 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
4528 char *addr, size_t bytes, bool read_only,
4529 bool allow_exec) {
4530 // This OS does not allow existing memory maps to be remapped so we
4531 // have to unmap the memory before we remap it.
4532 if (!os::unmap_memory(addr, bytes)) {
4533 return NULL;
4534 }
4535
4536 // There is a very small theoretical window between the unmap_memory()
4537 // call above and the map_memory() call below where a thread in native
4538 // code may be able to access an address that is no longer mapped.
4539
4540 return os::map_memory(fd, file_name, file_offset, addr, bytes,
4541 read_only, allow_exec);
4542 }
4543
4544
4545 // Unmap a block of memory.
4546 // Returns true=success, otherwise false.
4547
4548 bool os::pd_unmap_memory(char* addr, size_t bytes) {
4549 BOOL result = UnmapViewOfFile(addr);
4550 if (result == 0) {
4551 if (PrintMiscellaneous && Verbose) {
4552 DWORD err = GetLastError();
4553 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err);
4554 }
4555 return false;
4556 }
4557 return true;
4558 }
4559
4560 void os::pause() {
4561 char filename[MAX_PATH];
4562 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
4563 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
4564 } else {
4565 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
4566 }
4567
4568 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
4569 if (fd != -1) {
4570 struct stat buf;
4571 ::close(fd);
4572 while (::stat(filename, &buf) == 0) {
4573 Sleep(100);
4574 }
4575 } else {
4576 jio_fprintf(stderr,
4577 "Could not open pause file '%s', continuing immediately.\n", filename);
4578 }
4579 }
4580
4581 // An Event wraps a win32 "CreateEvent" kernel handle.
4582 //
4583 // We have a number of choices regarding "CreateEvent" win32 handle leakage:
4584 //
4585 // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle
4586 // field, and call CloseHandle() on the win32 event handle. Unpark() would
4587 // need to be modified to tolerate finding a NULL (invalid) win32 event handle.
4588 // In addition, an unpark() operation might fetch the handle field, but the
4589 // event could recycle between the fetch and the SetEvent() operation.
4590 // SetEvent() would either fail because the handle was invalid, or inadvertently work,
4591 // as the win32 handle value had been recycled. In an ideal world calling SetEvent()
4592 // on an stale but recycled handle would be harmless, but in practice this might
4593 // confuse other non-Sun code, so it's not a viable approach.
4594 //
4595 // 2: Once a win32 event handle is associated with an Event, it remains associated
4596 // with the Event. The event handle is never closed. This could be construed
4597 // as handle leakage, but only up to the maximum # of threads that have been extant
4598 // at any one time. This shouldn't be an issue, as windows platforms typically
4599 // permit a process to have hundreds of thousands of open handles.
4600 //
4601 // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList
4602 // and release unused handles.
4603 //
4604 // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle.
4605 // It's not clear, however, that we wouldn't be trading one type of leak for another.
4606 //
4607 // 5. Use an RCU-like mechanism (Read-Copy Update).
4608 // Or perhaps something similar to Maged Michael's "Hazard pointers".
4609 //
4610 // We use (2).
4611 //
4612 // TODO-FIXME:
4613 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation.
4614 // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks
4615 // to recover from (or at least detect) the dreaded Windows 841176 bug.
4616 // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent
4617 // into a single win32 CreateEvent() handle.
4618 //
4619 // _Event transitions in park()
4620 // -1 => -1 : illegal
4621 // 1 => 0 : pass - return immediately
4622 // 0 => -1 : block
4623 //
4624 // _Event serves as a restricted-range semaphore :
4625 // -1 : thread is blocked
4626 // 0 : neutral - thread is running or ready
4627 // 1 : signaled - thread is running or ready
4628 //
4629 // Another possible encoding of _Event would be
4630 // with explicit "PARKED" and "SIGNALED" bits.
4631
4632 int os::PlatformEvent::park (jlong Millis) {
4633 guarantee (_ParkHandle != NULL , "Invariant") ;
4634 guarantee (Millis > 0 , "Invariant") ;
4635 int v ;
4636
4637 // CONSIDER: defer assigning a CreateEvent() handle to the Event until
4638 // the initial park() operation.
4639
4640 for (;;) {
4641 v = _Event ;
4642 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
4643 }
4644 guarantee ((v == 0) || (v == 1), "invariant") ;
4645 if (v != 0) return OS_OK ;
4646
4647 // Do this the hard way by blocking ...
4648 // TODO: consider a brief spin here, gated on the success of recent
4649 // spin attempts by this thread.
4650 //
4651 // We decompose long timeouts into series of shorter timed waits.
4652 // Evidently large timo values passed in WaitForSingleObject() are problematic on some
4653 // versions of Windows. See EventWait() for details. This may be superstition. Or not.
4654 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time
4655 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from
4656 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend
4657 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv ==
4658 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate
4659 // for the already waited time. This policy does not admit any new outcomes.
4660 // In the future, however, we might want to track the accumulated wait time and
4661 // adjust Millis accordingly if we encounter a spurious wakeup.
4662
4663 const int MAXTIMEOUT = 0x10000000 ;
4664 DWORD rv = WAIT_TIMEOUT ;
4665 while (_Event < 0 && Millis > 0) {
4666 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT)
4667 if (Millis > MAXTIMEOUT) {
4668 prd = MAXTIMEOUT ;
4669 }
4670 rv = ::WaitForSingleObject (_ParkHandle, prd) ;
4671 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ;
4672 if (rv == WAIT_TIMEOUT) {
4673 Millis -= prd ;
4674 }
4675 }
4676 v = _Event ;
4677 _Event = 0 ;
4678 // see comment at end of os::PlatformEvent::park() below:
4679 OrderAccess::fence() ;
4680 // If we encounter a nearly simultanous timeout expiry and unpark()
4681 // we return OS_OK indicating we awoke via unpark().
4682 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however.
4683 return (v >= 0) ? OS_OK : OS_TIMEOUT ;
4684 }
4685
4686 void os::PlatformEvent::park () {
4687 guarantee (_ParkHandle != NULL, "Invariant") ;
4688 // Invariant: Only the thread associated with the Event/PlatformEvent
4689 // may call park().
4690 int v ;
4691 for (;;) {
4692 v = _Event ;
4693 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
4694 }
4695 guarantee ((v == 0) || (v == 1), "invariant") ;
4696 if (v != 0) return ;
4697
4698 // Do this the hard way by blocking ...
4699 // TODO: consider a brief spin here, gated on the success of recent
4700 // spin attempts by this thread.
4701 while (_Event < 0) {
4702 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ;
4703 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ;
4704 }
4705
4706 // Usually we'll find _Event == 0 at this point, but as
4707 // an optional optimization we clear it, just in case can
4708 // multiple unpark() operations drove _Event up to 1.
4709 _Event = 0 ;
4710 OrderAccess::fence() ;
4711 guarantee (_Event >= 0, "invariant") ;
4712 }
4713
4714 void os::PlatformEvent::unpark() {
4715 guarantee (_ParkHandle != NULL, "Invariant") ;
4716
4717 // Transitions for _Event:
4718 // 0 :=> 1
4719 // 1 :=> 1
4720 // -1 :=> either 0 or 1; must signal target thread
4721 // That is, we can safely transition _Event from -1 to either
4722 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back
4723 // unpark() calls.
4724 // See also: "Semaphores in Plan 9" by Mullender & Cox
4725 //
4726 // Note: Forcing a transition from "-1" to "1" on an unpark() means
4727 // that it will take two back-to-back park() calls for the owning
4728 // thread to block. This has the benefit of forcing a spurious return
4729 // from the first park() call after an unpark() call which will help
4730 // shake out uses of park() and unpark() without condition variables.
4731
4732 if (Atomic::xchg(1, &_Event) >= 0) return;
4733
4734 ::SetEvent(_ParkHandle);
4735 }
4736
4737
4738 // JSR166
4739 // -------------------------------------------------------
4740
4741 /*
4742 * The Windows implementation of Park is very straightforward: Basic
4743 * operations on Win32 Events turn out to have the right semantics to
4744 * use them directly. We opportunistically resuse the event inherited
4745 * from Monitor.
4746 */
4747
4748
4749 void Parker::park(bool isAbsolute, jlong time) {
4750 guarantee (_ParkEvent != NULL, "invariant") ;
4751 // First, demultiplex/decode time arguments
4752 if (time < 0) { // don't wait
4753 return;
4754 }
4755 else if (time == 0 && !isAbsolute) {
4756 time = INFINITE;
4757 }
4758 else if (isAbsolute) {
4759 time -= os::javaTimeMillis(); // convert to relative time
4760 if (time <= 0) // already elapsed
4761 return;
4762 }
4763 else { // relative
4764 time /= 1000000; // Must coarsen from nanos to millis
4765 if (time == 0) // Wait for the minimal time unit if zero
4766 time = 1;
4767 }
4768
4769 JavaThread* thread = (JavaThread*)(Thread::current());
4770 assert(thread->is_Java_thread(), "Must be JavaThread");
4771 JavaThread *jt = (JavaThread *)thread;
4772
4773 // Don't wait if interrupted or already triggered
4774 if (Thread::is_interrupted(thread, false) ||
4775 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) {
4776 ResetEvent(_ParkEvent);
4777 return;
4778 }
4779 else {
4780 ThreadBlockInVM tbivm(jt);
4781 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
4782 jt->set_suspend_equivalent();
4783
4784 WaitForSingleObject(_ParkEvent, time);
4785 ResetEvent(_ParkEvent);
4786
4787 // If externally suspended while waiting, re-suspend
4788 if (jt->handle_special_suspend_equivalent_condition()) {
4789 jt->java_suspend_self();
4790 }
4791 }
4792 }
4793
4794 void Parker::unpark() {
4795 guarantee (_ParkEvent != NULL, "invariant") ;
4796 SetEvent(_ParkEvent);
4797 }
4798
4799 // Run the specified command in a separate process. Return its exit value,
4800 // or -1 on failure (e.g. can't create a new process).
4801 int os::fork_and_exec(char* cmd) {
4802 STARTUPINFO si;
4803 PROCESS_INFORMATION pi;
4804
4805 memset(&si, 0, sizeof(si));
4806 si.cb = sizeof(si);
4807 memset(&pi, 0, sizeof(pi));
4808 BOOL rslt = CreateProcess(NULL, // executable name - use command line
4809 cmd, // command line
4810 NULL, // process security attribute
4811 NULL, // thread security attribute
4812 TRUE, // inherits system handles
4813 0, // no creation flags
4814 NULL, // use parent's environment block
4815 NULL, // use parent's starting directory
4816 &si, // (in) startup information
4817 &pi); // (out) process information
4818
4819 if (rslt) {
4820 // Wait until child process exits.
4821 WaitForSingleObject(pi.hProcess, INFINITE);
4822
4823 DWORD exit_code;
4824 GetExitCodeProcess(pi.hProcess, &exit_code);
4825
4826 // Close process and thread handles.
4827 CloseHandle(pi.hProcess);
4828 CloseHandle(pi.hThread);
4829
4830 return (int)exit_code;
4831 } else {
4832 return -1;
4833 }
4834 }
4835
4836 //--------------------------------------------------------------------------------------------------
4837 // Non-product code
4838
4839 static int mallocDebugIntervalCounter = 0;
4840 static int mallocDebugCounter = 0;
4841 bool os::check_heap(bool force) {
4842 if (++mallocDebugCounter < MallocVerifyStart && !force) return true;
4843 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) {
4844 // Note: HeapValidate executes two hardware breakpoints when it finds something
4845 // wrong; at these points, eax contains the address of the offending block (I think).
4846 // To get to the exlicit error message(s) below, just continue twice.
4847 HANDLE heap = GetProcessHeap();
4848 { HeapLock(heap);
4849 PROCESS_HEAP_ENTRY phe;
4850 phe.lpData = NULL;
4851 while (HeapWalk(heap, &phe) != 0) {
4852 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) &&
4853 !HeapValidate(heap, 0, phe.lpData)) {
4854 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter);
4855 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData);
4856 fatal("corrupted C heap");
4857 }
4858 }
4859 DWORD err = GetLastError();
4860 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) {
4861 fatal(err_msg("heap walk aborted with error %d", err));
4862 }
4863 HeapUnlock(heap);
4864 }
4865 mallocDebugIntervalCounter = 0;
4866 }
4867 return true;
4868 }
4869
4870
4871 bool os::find(address addr, outputStream* st) {
4872 // Nothing yet
4873 return false;
4874 }
4875
4876 LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) {
4877 DWORD exception_code = e->ExceptionRecord->ExceptionCode;
4878
4879 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
4880 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow();
4881 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord;
4882 address addr = (address) exceptionRecord->ExceptionInformation[1];
4883
4884 if (os::is_memory_serialize_page(thread, addr))
4885 return EXCEPTION_CONTINUE_EXECUTION;
4886 }
4887
4888 return EXCEPTION_CONTINUE_SEARCH;
4889 }
4890
4891 // We don't build a headless jre for Windows
4892 bool os::is_headless_jre() { return false; }
4893
4894
4895 typedef CRITICAL_SECTION mutex_t;
4896 #define mutexInit(m) InitializeCriticalSection(m)
4897 #define mutexDestroy(m) DeleteCriticalSection(m)
4898 #define mutexLock(m) EnterCriticalSection(m)
4899 #define mutexUnlock(m) LeaveCriticalSection(m)
4900
4901 static bool sock_initialized = FALSE;
4902 static mutex_t sockFnTableMutex;
4903
4904 static void initSock() {
4905 WSADATA wsadata;
4906
4907 if (!os::WinSock2Dll::WinSock2Available()) {
4908 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n",
4909 ::GetLastError());
4910 return;
4911 }
4912 if (sock_initialized == TRUE) return;
4913
4914 ::mutexInit(&sockFnTableMutex);
4915 ::mutexLock(&sockFnTableMutex);
4916 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) {
4917 jio_fprintf(stderr, "Could not initialize Winsock\n");
4918 }
4919 sock_initialized = TRUE;
4920 ::mutexUnlock(&sockFnTableMutex);
4921 }
4922
4923 struct hostent* os::get_host_by_name(char* name) {
4924 if (!sock_initialized) {
4925 initSock();
4926 }
4927 if (!os::WinSock2Dll::WinSock2Available()) {
4928 return NULL;
4929 }
4930 return (struct hostent*)os::WinSock2Dll::gethostbyname(name);
4931 }
4932
4933 int os::socket_close(int fd) {
4934 return ::closesocket(fd);
4935 }
4936
4937 int os::socket_available(int fd, jint *pbytes) {
4938 int ret = ::ioctlsocket(fd, FIONREAD, (u_long*)pbytes);
4939 return (ret < 0) ? 0 : 1;
4940 }
4941
4942 int os::socket(int domain, int type, int protocol) {
4943 return ::socket(domain, type, protocol);
4944 }
4945
4946 int os::listen(int fd, int count) {
4947 return ::listen(fd, count);
4948 }
4949
4950 int os::connect(int fd, struct sockaddr* him, socklen_t len) {
4951 return ::connect(fd, him, len);
4952 }
4953
4954 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
4955 return ::accept(fd, him, len);
4956 }
4957
4958 int os::sendto(int fd, char* buf, size_t len, uint flags,
4959 struct sockaddr* to, socklen_t tolen) {
4960
4961 return ::sendto(fd, buf, (int)len, flags, to, tolen);
4962 }
4963
4964 int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags,
4965 sockaddr* from, socklen_t* fromlen) {
4966
4967 return ::recvfrom(fd, buf, (int)nBytes, flags, from, fromlen);
4968 }
4969
4970 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
4971 return ::recv(fd, buf, (int)nBytes, flags);
4972 }
4973
4974 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
4975 return ::send(fd, buf, (int)nBytes, flags);
4976 }
4977
4978 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
4979 return ::send(fd, buf, (int)nBytes, flags);
4980 }
4981
4982 int os::timeout(int fd, long timeout) {
4983 fd_set tbl;
4984 struct timeval t;
4985
4986 t.tv_sec = timeout / 1000;
4987 t.tv_usec = (timeout % 1000) * 1000;
4988
4989 tbl.fd_count = 1;
4990 tbl.fd_array[0] = fd;
4991
4992 return ::select(1, &tbl, 0, 0, &t);
4993 }
4994
4995 int os::get_host_name(char* name, int namelen) {
4996 return ::gethostname(name, namelen);
4997 }
4998
4999 int os::socket_shutdown(int fd, int howto) {
5000 return ::shutdown(fd, howto);
5001 }
5002
5003 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
5004 return ::bind(fd, him, len);
5005 }
5006
5007 int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
5008 return ::getsockname(fd, him, len);
5009 }
5010
5011 int os::get_sock_opt(int fd, int level, int optname,
5012 char* optval, socklen_t* optlen) {
5013 return ::getsockopt(fd, level, optname, optval, optlen);
5014 }
5015
5016 int os::set_sock_opt(int fd, int level, int optname,
5017 const char* optval, socklen_t optlen) {
5018 return ::setsockopt(fd, level, optname, optval, optlen);
5019 }
5020
5021
5022 // Kernel32 API
5023 typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void);
5024 typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD);
5025 typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG);
5026 typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG);
5027 typedef USHORT (WINAPI* RtlCaptureStackBackTrace_Fn)(ULONG, ULONG, PVOID*, PULONG);
5028
5029 GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL;
5030 VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL;
5031 GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL;
5032 GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL;
5033 RtlCaptureStackBackTrace_Fn os::Kernel32Dll::_RtlCaptureStackBackTrace = NULL;
5034
5035
5036 BOOL os::Kernel32Dll::initialized = FALSE;
5037 SIZE_T os::Kernel32Dll::GetLargePageMinimum() {
5038 assert(initialized && _GetLargePageMinimum != NULL,
5039 "GetLargePageMinimumAvailable() not yet called");
5040 return _GetLargePageMinimum();
5041 }
5042
5043 BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() {
5044 if (!initialized) {
5045 initialize();
5046 }
5047 return _GetLargePageMinimum != NULL;
5048 }
5049
5050 BOOL os::Kernel32Dll::NumaCallsAvailable() {
5051 if (!initialized) {
5052 initialize();
5053 }
5054 return _VirtualAllocExNuma != NULL;
5055 }
5056
5057 LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) {
5058 assert(initialized && _VirtualAllocExNuma != NULL,
5059 "NUMACallsAvailable() not yet called");
5060
5061 return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node);
5062 }
5063
5064 BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) {
5065 assert(initialized && _GetNumaHighestNodeNumber != NULL,
5066 "NUMACallsAvailable() not yet called");
5067
5068 return _GetNumaHighestNodeNumber(ptr_highest_node_number);
5069 }
5070
5071 BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) {
5072 assert(initialized && _GetNumaNodeProcessorMask != NULL,
5073 "NUMACallsAvailable() not yet called");
5074
5075 return _GetNumaNodeProcessorMask(node, proc_mask);
5076 }
5077
5078 USHORT os::Kernel32Dll::RtlCaptureStackBackTrace(ULONG FrameToSkip,
5079 ULONG FrameToCapture, PVOID* BackTrace, PULONG BackTraceHash) {
5080 if (!initialized) {
5081 initialize();
5082 }
5083
5084 if (_RtlCaptureStackBackTrace != NULL) {
5085 return _RtlCaptureStackBackTrace(FrameToSkip, FrameToCapture,
5086 BackTrace, BackTraceHash);
5087 } else {
5088 return 0;
5089 }
5090 }
5091
5092 void os::Kernel32Dll::initializeCommon() {
5093 if (!initialized) {
5094 HMODULE handle = ::GetModuleHandle("Kernel32.dll");
5095 assert(handle != NULL, "Just check");
5096 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum");
5097 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma");
5098 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber");
5099 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask");
5100 _RtlCaptureStackBackTrace = (RtlCaptureStackBackTrace_Fn)::GetProcAddress(handle, "RtlCaptureStackBackTrace");
5101 initialized = TRUE;
5102 }
5103 }
5104
5105
5106
5107 #ifndef JDK6_OR_EARLIER
5108
5109 void os::Kernel32Dll::initialize() {
5110 initializeCommon();
5111 }
5112
5113
5114 // Kernel32 API
5115 inline BOOL os::Kernel32Dll::SwitchToThread() {
5116 return ::SwitchToThread();
5117 }
5118
5119 inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
5120 return true;
5121 }
5122
5123 // Help tools
5124 inline BOOL os::Kernel32Dll::HelpToolsAvailable() {
5125 return true;
5126 }
5127
5128 inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
5129 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
5130 }
5131
5132 inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5133 return ::Module32First(hSnapshot, lpme);
5134 }
5135
5136 inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5137 return ::Module32Next(hSnapshot, lpme);
5138 }
5139
5140
5141 inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
5142 return true;
5143 }
5144
5145 inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
5146 ::GetNativeSystemInfo(lpSystemInfo);
5147 }
5148
5149 // PSAPI API
5150 inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
5151 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
5152 }
5153
5154 inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
5155 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
5156 }
5157
5158 inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
5159 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
5160 }
5161
5162 inline BOOL os::PSApiDll::PSApiAvailable() {
5163 return true;
5164 }
5165
5166
5167 // WinSock2 API
5168 inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
5169 return ::WSAStartup(wVersionRequested, lpWSAData);
5170 }
5171
5172 inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
5173 return ::gethostbyname(name);
5174 }
5175
5176 inline BOOL os::WinSock2Dll::WinSock2Available() {
5177 return true;
5178 }
5179
5180 // Advapi API
5181 inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
5182 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
5183 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
5184 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
5185 BufferLength, PreviousState, ReturnLength);
5186 }
5187
5188 inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
5189 PHANDLE TokenHandle) {
5190 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
5191 }
5192
5193 inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
5194 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
5195 }
5196
5197 inline BOOL os::Advapi32Dll::AdvapiAvailable() {
5198 return true;
5199 }
5200
5201 #else
5202 // Kernel32 API
5203 typedef BOOL (WINAPI* SwitchToThread_Fn)(void);
5204 typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD);
5205 typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32);
5206 typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32);
5207 typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO);
5208
5209 SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL;
5210 CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL;
5211 Module32First_Fn os::Kernel32Dll::_Module32First = NULL;
5212 Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL;
5213 GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL;
5214
5215 void os::Kernel32Dll::initialize() {
5216 if (!initialized) {
5217 HMODULE handle = ::GetModuleHandle("Kernel32.dll");
5218 assert(handle != NULL, "Just check");
5219
5220 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread");
5221 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn)
5222 ::GetProcAddress(handle, "CreateToolhelp32Snapshot");
5223 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First");
5224 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next");
5225 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo");
5226 initializeCommon(); // resolve the functions that always need resolving
5227
5228 initialized = TRUE;
5229 }
5230 }
5231
5232 BOOL os::Kernel32Dll::SwitchToThread() {
5233 assert(initialized && _SwitchToThread != NULL,
5234 "SwitchToThreadAvailable() not yet called");
5235 return _SwitchToThread();
5236 }
5237
5238
5239 BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
5240 if (!initialized) {
5241 initialize();
5242 }
5243 return _SwitchToThread != NULL;
5244 }
5245
5246 // Help tools
5247 BOOL os::Kernel32Dll::HelpToolsAvailable() {
5248 if (!initialized) {
5249 initialize();
5250 }
5251 return _CreateToolhelp32Snapshot != NULL &&
5252 _Module32First != NULL &&
5253 _Module32Next != NULL;
5254 }
5255
5256 HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
5257 assert(initialized && _CreateToolhelp32Snapshot != NULL,
5258 "HelpToolsAvailable() not yet called");
5259
5260 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
5261 }
5262
5263 BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5264 assert(initialized && _Module32First != NULL,
5265 "HelpToolsAvailable() not yet called");
5266
5267 return _Module32First(hSnapshot, lpme);
5268 }
5269
5270 inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5271 assert(initialized && _Module32Next != NULL,
5272 "HelpToolsAvailable() not yet called");
5273
5274 return _Module32Next(hSnapshot, lpme);
5275 }
5276
5277
5278 BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
5279 if (!initialized) {
5280 initialize();
5281 }
5282 return _GetNativeSystemInfo != NULL;
5283 }
5284
5285 void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
5286 assert(initialized && _GetNativeSystemInfo != NULL,
5287 "GetNativeSystemInfoAvailable() not yet called");
5288
5289 _GetNativeSystemInfo(lpSystemInfo);
5290 }
5291
5292 // PSAPI API
5293
5294
5295 typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD);
5296 typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);;
5297 typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD);
5298
5299 EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL;
5300 GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL;
5301 GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL;
5302 BOOL os::PSApiDll::initialized = FALSE;
5303
5304 void os::PSApiDll::initialize() {
5305 if (!initialized) {
5306 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0);
5307 if (handle != NULL) {
5308 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle,
5309 "EnumProcessModules");
5310 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle,
5311 "GetModuleFileNameExA");
5312 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle,
5313 "GetModuleInformation");
5314 }
5315 initialized = TRUE;
5316 }
5317 }
5318
5319
5320
5321 BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
5322 assert(initialized && _EnumProcessModules != NULL,
5323 "PSApiAvailable() not yet called");
5324 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
5325 }
5326
5327 DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
5328 assert(initialized && _GetModuleFileNameEx != NULL,
5329 "PSApiAvailable() not yet called");
5330 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
5331 }
5332
5333 BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
5334 assert(initialized && _GetModuleInformation != NULL,
5335 "PSApiAvailable() not yet called");
5336 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
5337 }
5338
5339 BOOL os::PSApiDll::PSApiAvailable() {
5340 if (!initialized) {
5341 initialize();
5342 }
5343 return _EnumProcessModules != NULL &&
5344 _GetModuleFileNameEx != NULL &&
5345 _GetModuleInformation != NULL;
5346 }
5347
5348
5349 // WinSock2 API
5350 typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA);
5351 typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...);
5352
5353 WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL;
5354 gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL;
5355 BOOL os::WinSock2Dll::initialized = FALSE;
5356
5357 void os::WinSock2Dll::initialize() {
5358 if (!initialized) {
5359 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0);
5360 if (handle != NULL) {
5361 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup");
5362 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname");
5363 }
5364 initialized = TRUE;
5365 }
5366 }
5367
5368
5369 BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
5370 assert(initialized && _WSAStartup != NULL,
5371 "WinSock2Available() not yet called");
5372 return _WSAStartup(wVersionRequested, lpWSAData);
5373 }
5374
5375 struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
5376 assert(initialized && _gethostbyname != NULL,
5377 "WinSock2Available() not yet called");
5378 return _gethostbyname(name);
5379 }
5380
5381 BOOL os::WinSock2Dll::WinSock2Available() {
5382 if (!initialized) {
5383 initialize();
5384 }
5385 return _WSAStartup != NULL &&
5386 _gethostbyname != NULL;
5387 }
5388
5389 typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
5390 typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE);
5391 typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID);
5392
5393 AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL;
5394 OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL;
5395 LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL;
5396 BOOL os::Advapi32Dll::initialized = FALSE;
5397
5398 void os::Advapi32Dll::initialize() {
5399 if (!initialized) {
5400 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0);
5401 if (handle != NULL) {
5402 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle,
5403 "AdjustTokenPrivileges");
5404 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle,
5405 "OpenProcessToken");
5406 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle,
5407 "LookupPrivilegeValueA");
5408 }
5409 initialized = TRUE;
5410 }
5411 }
5412
5413 BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
5414 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
5415 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
5416 assert(initialized && _AdjustTokenPrivileges != NULL,
5417 "AdvapiAvailable() not yet called");
5418 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
5419 BufferLength, PreviousState, ReturnLength);
5420 }
5421
5422 BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
5423 PHANDLE TokenHandle) {
5424 assert(initialized && _OpenProcessToken != NULL,
5425 "AdvapiAvailable() not yet called");
5426 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
5427 }
5428
5429 BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
5430 assert(initialized && _LookupPrivilegeValue != NULL,
5431 "AdvapiAvailable() not yet called");
5432 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
5433 }
5434
5435 BOOL os::Advapi32Dll::AdvapiAvailable() {
5436 if (!initialized) {
5437 initialize();
5438 }
5439 return _AdjustTokenPrivileges != NULL &&
5440 _OpenProcessToken != NULL &&
5441 _LookupPrivilegeValue != NULL;
5442 }
5443
5444 #endif