1 /*
2 * Copyright (c) 1997, 2011, 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 VectoredExceptions and 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 "interpreter/interpreter.hpp"
36 #include "jvm_windows.h"
37 #include "memory/allocation.inline.hpp"
38 #include "memory/filemap.hpp"
39 #include "mutex_windows.inline.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "os_share_windows.hpp"
42 #include "prims/jniFastGetField.hpp"
43 #include "prims/jvm.h"
44 #include "prims/jvm_misc.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/extendedPC.hpp"
47 #include "runtime/globals.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/java.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/mutexLocker.hpp"
52 #include "runtime/objectMonitor.hpp"
53 #include "runtime/osThread.hpp"
54 #include "runtime/perfMemory.hpp"
55 #include "runtime/sharedRuntime.hpp"
56 #include "runtime/statSampler.hpp"
57 #include "runtime/stubRoutines.hpp"
58 #include "runtime/threadCritical.hpp"
59 #include "runtime/timer.hpp"
60 #include "services/attachListener.hpp"
61 #include "services/runtimeService.hpp"
62 #include "thread_windows.inline.hpp"
63 #include "utilities/decoder.hpp"
64 #include "utilities/defaultStream.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/growableArray.hpp"
67 #include "utilities/vmError.hpp"
68 #ifdef TARGET_ARCH_x86
69 # include "assembler_x86.inline.hpp"
70 # include "nativeInst_x86.hpp"
71 #endif
72 #ifdef COMPILER1
73 #include "c1/c1_Runtime1.hpp"
74 #endif
75 #ifdef COMPILER2
76 #include "opto/runtime.hpp"
77 #endif
78
79 #ifdef _DEBUG
80 #include <crtdbg.h>
81 #endif
82
83
84 #include <windows.h>
85 #include <sys/types.h>
86 #include <sys/stat.h>
87 #include <sys/timeb.h>
88 #include <objidl.h>
89 #include <shlobj.h>
90
91 #include <malloc.h>
92 #include <signal.h>
93 #include <direct.h>
94 #include <errno.h>
95 #include <fcntl.h>
96 #include <io.h>
97 #include <process.h> // For _beginthreadex(), _endthreadex()
98 #include <imagehlp.h> // For os::dll_address_to_function_name
99
100 /* for enumerating dll libraries */
101 #include <vdmdbg.h>
102
103 // for timer info max values which include all bits
104 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
105
106 // For DLL loading/load error detection
107 // Values of PE COFF
108 #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c
109 #define IMAGE_FILE_SIGNATURE_LENGTH 4
110
111 static HANDLE main_process;
112 static HANDLE main_thread;
113 static int main_thread_id;
114
115 static FILETIME process_creation_time;
116 static FILETIME process_exit_time;
117 static FILETIME process_user_time;
118 static FILETIME process_kernel_time;
119
120 #ifdef _WIN64
121 PVOID topLevelVectoredExceptionHandler = NULL;
122 #endif
123
124 #ifdef _M_IA64
125 #define __CPU__ ia64
126 #elif _M_AMD64
127 #define __CPU__ amd64
128 #else
129 #define __CPU__ i486
130 #endif
131
132 // save DLL module handle, used by GetModuleFileName
133
134 HINSTANCE vm_lib_handle;
135
136 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
137 switch (reason) {
138 case DLL_PROCESS_ATTACH:
139 vm_lib_handle = hinst;
140 if(ForceTimeHighResolution)
141 timeBeginPeriod(1L);
142 break;
143 case DLL_PROCESS_DETACH:
144 if(ForceTimeHighResolution)
145 timeEndPeriod(1L);
146 #ifdef _WIN64
147 if (topLevelVectoredExceptionHandler != NULL) {
148 RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler);
149 topLevelVectoredExceptionHandler = NULL;
150 }
151 #endif
152 break;
153 default:
154 break;
155 }
156 return true;
157 }
158
159 static inline double fileTimeAsDouble(FILETIME* time) {
160 const double high = (double) ((unsigned int) ~0);
161 const double split = 10000000.0;
162 double result = (time->dwLowDateTime / split) +
163 time->dwHighDateTime * (high/split);
164 return result;
165 }
166
167 // Implementation of os
168
169 bool os::getenv(const char* name, char* buffer, int len) {
170 int result = GetEnvironmentVariable(name, buffer, len);
171 return result > 0 && result < len;
172 }
173
174
175 // No setuid programs under Windows.
176 bool os::have_special_privileges() {
177 return false;
178 }
179
180
181 // This method is a periodic task to check for misbehaving JNI applications
182 // under CheckJNI, we can add any periodic checks here.
183 // For Windows at the moment does nothing
184 void os::run_periodic_checks() {
185 return;
186 }
187
188 #ifndef _WIN64
189 // previous UnhandledExceptionFilter, if there is one
190 static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL;
191
192 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo);
193 #endif
194 void os::init_system_properties_values() {
195 /* sysclasspath, java_home, dll_dir */
196 {
197 char *home_path;
198 char *dll_path;
199 char *pslash;
200 char *bin = "\\bin";
201 char home_dir[MAX_PATH];
202
203 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) {
204 os::jvm_path(home_dir, sizeof(home_dir));
205 // Found the full path to jvm[_g].dll.
206 // Now cut the path to <java_home>/jre if we can.
207 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */
208 pslash = strrchr(home_dir, '\\');
209 if (pslash != NULL) {
210 *pslash = '\0'; /* get rid of \{client|server} */
211 pslash = strrchr(home_dir, '\\');
212 if (pslash != NULL)
213 *pslash = '\0'; /* get rid of \bin */
214 }
215 }
216
217 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1);
218 if (home_path == NULL)
219 return;
220 strcpy(home_path, home_dir);
221 Arguments::set_java_home(home_path);
222
223 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1);
224 if (dll_path == NULL)
225 return;
226 strcpy(dll_path, home_dir);
227 strcat(dll_path, bin);
228 Arguments::set_dll_dir(dll_path);
229
230 if (!set_boot_path('\\', ';'))
231 return;
232 }
233
234 /* library_path */
235 #define EXT_DIR "\\lib\\ext"
236 #define BIN_DIR "\\bin"
237 #define PACKAGE_DIR "\\Sun\\Java"
238 {
239 /* Win32 library search order (See the documentation for LoadLibrary):
240 *
241 * 1. The directory from which application is loaded.
242 * 2. The system wide Java Extensions directory (Java only)
243 * 3. System directory (GetSystemDirectory)
244 * 4. Windows directory (GetWindowsDirectory)
245 * 5. The PATH environment variable
246 * 6. The current directory
247 */
248
249 char *library_path;
250 char tmp[MAX_PATH];
251 char *path_str = ::getenv("PATH");
252
253 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) +
254 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10);
255
256 library_path[0] = '\0';
257
258 GetModuleFileName(NULL, tmp, sizeof(tmp));
259 *(strrchr(tmp, '\\')) = '\0';
260 strcat(library_path, tmp);
261
262 GetWindowsDirectory(tmp, sizeof(tmp));
263 strcat(library_path, ";");
264 strcat(library_path, tmp);
265 strcat(library_path, PACKAGE_DIR BIN_DIR);
266
267 GetSystemDirectory(tmp, sizeof(tmp));
268 strcat(library_path, ";");
269 strcat(library_path, tmp);
270
271 GetWindowsDirectory(tmp, sizeof(tmp));
272 strcat(library_path, ";");
273 strcat(library_path, tmp);
274
275 if (path_str) {
276 strcat(library_path, ";");
277 strcat(library_path, path_str);
278 }
279
280 strcat(library_path, ";.");
281
282 Arguments::set_library_path(library_path);
283 FREE_C_HEAP_ARRAY(char, library_path);
284 }
285
286 /* Default extensions directory */
287 {
288 char path[MAX_PATH];
289 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1];
290 GetWindowsDirectory(path, MAX_PATH);
291 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR,
292 path, PACKAGE_DIR, EXT_DIR);
293 Arguments::set_ext_dirs(buf);
294 }
295 #undef EXT_DIR
296 #undef BIN_DIR
297 #undef PACKAGE_DIR
298
299 /* Default endorsed standards directory. */
300 {
301 #define ENDORSED_DIR "\\lib\\endorsed"
302 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR);
303 char * buf = NEW_C_HEAP_ARRAY(char, len);
304 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR);
305 Arguments::set_endorsed_dirs(buf);
306 #undef ENDORSED_DIR
307 }
308
309 #ifndef _WIN64
310 // set our UnhandledExceptionFilter and save any previous one
311 prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception);
312 #endif
313
314 // Done
315 return;
316 }
317
318 void os::breakpoint() {
319 DebugBreak();
320 }
321
322 // Invoked from the BREAKPOINT Macro
323 extern "C" void breakpoint() {
324 os::breakpoint();
325 }
326
327 // Returns an estimate of the current stack pointer. Result must be guaranteed
328 // to point into the calling threads stack, and be no lower than the current
329 // stack pointer.
330
331 address os::current_stack_pointer() {
332 int dummy;
333 address sp = (address)&dummy;
334 return sp;
335 }
336
337 // os::current_stack_base()
338 //
339 // Returns the base of the stack, which is the stack's
340 // starting address. This function must be called
341 // while running on the stack of the thread being queried.
342
343 address os::current_stack_base() {
344 MEMORY_BASIC_INFORMATION minfo;
345 address stack_bottom;
346 size_t stack_size;
347
348 VirtualQuery(&minfo, &minfo, sizeof(minfo));
349 stack_bottom = (address)minfo.AllocationBase;
350 stack_size = minfo.RegionSize;
351
352 // Add up the sizes of all the regions with the same
353 // AllocationBase.
354 while( 1 )
355 {
356 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo));
357 if ( stack_bottom == (address)minfo.AllocationBase )
358 stack_size += minfo.RegionSize;
359 else
360 break;
361 }
362
363 #ifdef _M_IA64
364 // IA64 has memory and register stacks
365 stack_size = stack_size / 2;
366 #endif
367 return stack_bottom + stack_size;
368 }
369
370 size_t os::current_stack_size() {
371 size_t sz;
372 MEMORY_BASIC_INFORMATION minfo;
373 VirtualQuery(&minfo, &minfo, sizeof(minfo));
374 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
375 return sz;
376 }
377
378 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
379 const struct tm* time_struct_ptr = localtime(clock);
380 if (time_struct_ptr != NULL) {
381 *res = *time_struct_ptr;
382 return res;
383 }
384 return NULL;
385 }
386
387 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo);
388
389 // Thread start routine for all new Java threads
390 static unsigned __stdcall java_start(Thread* thread) {
391 // Try to randomize the cache line index of hot stack frames.
392 // This helps when threads of the same stack traces evict each other's
393 // cache lines. The threads can be either from the same JVM instance, or
394 // from different JVM instances. The benefit is especially true for
395 // processors with hyperthreading technology.
396 static int counter = 0;
397 int pid = os::current_process_id();
398 _alloca(((pid ^ counter++) & 7) * 128);
399
400 OSThread* osthr = thread->osthread();
401 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
402
403 if (UseNUMA) {
404 int lgrp_id = os::numa_get_group_id();
405 if (lgrp_id != -1) {
406 thread->set_lgrp_id(lgrp_id);
407 }
408 }
409
410
411 if (UseVectoredExceptions) {
412 // If we are using vectored exception we don't need to set a SEH
413 thread->run();
414 }
415 else {
416 // Install a win32 structured exception handler around every thread created
417 // by VM, so VM can genrate error dump when an exception occurred in non-
418 // Java thread (e.g. VM thread).
419 __try {
420 thread->run();
421 } __except(topLevelExceptionFilter(
422 (_EXCEPTION_POINTERS*)_exception_info())) {
423 // Nothing to do.
424 }
425 }
426
427 // One less thread is executing
428 // When the VMThread gets here, the main thread may have already exited
429 // which frees the CodeHeap containing the Atomic::add code
430 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
431 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count);
432 }
433
434 return 0;
435 }
436
437 static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) {
438 // Allocate the OSThread object
439 OSThread* osthread = new OSThread(NULL, NULL);
440 if (osthread == NULL) return NULL;
441
442 // Initialize support for Java interrupts
443 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
444 if (interrupt_event == NULL) {
445 delete osthread;
446 return NULL;
447 }
448 osthread->set_interrupt_event(interrupt_event);
449
450 // Store info on the Win32 thread into the OSThread
451 osthread->set_thread_handle(thread_handle);
452 osthread->set_thread_id(thread_id);
453
454 if (UseNUMA) {
455 int lgrp_id = os::numa_get_group_id();
456 if (lgrp_id != -1) {
457 thread->set_lgrp_id(lgrp_id);
458 }
459 }
460
461 // Initial thread state is INITIALIZED, not SUSPENDED
462 osthread->set_state(INITIALIZED);
463
464 return osthread;
465 }
466
467
468 bool os::create_attached_thread(JavaThread* thread) {
469 #ifdef ASSERT
470 thread->verify_not_published();
471 #endif
472 HANDLE thread_h;
473 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(),
474 &thread_h, THREAD_ALL_ACCESS, false, 0)) {
475 fatal("DuplicateHandle failed\n");
476 }
477 OSThread* osthread = create_os_thread(thread, thread_h,
478 (int)current_thread_id());
479 if (osthread == NULL) {
480 return false;
481 }
482
483 // Initial thread state is RUNNABLE
484 osthread->set_state(RUNNABLE);
485
486 thread->set_osthread(osthread);
487 return true;
488 }
489
490 bool os::create_main_thread(JavaThread* thread) {
491 #ifdef ASSERT
492 thread->verify_not_published();
493 #endif
494 if (_starting_thread == NULL) {
495 _starting_thread = create_os_thread(thread, main_thread, main_thread_id);
496 if (_starting_thread == NULL) {
497 return false;
498 }
499 }
500
501 // The primordial thread is runnable from the start)
502 _starting_thread->set_state(RUNNABLE);
503
504 thread->set_osthread(_starting_thread);
505 return true;
506 }
507
508 // Allocate and initialize a new OSThread
509 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
510 unsigned thread_id;
511
512 // Allocate the OSThread object
513 OSThread* osthread = new OSThread(NULL, NULL);
514 if (osthread == NULL) {
515 return false;
516 }
517
518 // Initialize support for Java interrupts
519 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
520 if (interrupt_event == NULL) {
521 delete osthread;
522 return NULL;
523 }
524 osthread->set_interrupt_event(interrupt_event);
525 osthread->set_interrupted(false);
526
527 thread->set_osthread(osthread);
528
529 if (stack_size == 0) {
530 switch (thr_type) {
531 case os::java_thread:
532 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
533 if (JavaThread::stack_size_at_create() > 0)
534 stack_size = JavaThread::stack_size_at_create();
535 break;
536 case os::compiler_thread:
537 if (CompilerThreadStackSize > 0) {
538 stack_size = (size_t)(CompilerThreadStackSize * K);
539 break;
540 } // else fall through:
541 // use VMThreadStackSize if CompilerThreadStackSize is not defined
542 case os::vm_thread:
543 case os::pgc_thread:
544 case os::cgc_thread:
545 case os::watcher_thread:
546 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
547 break;
548 }
549 }
550
551 // Create the Win32 thread
552 //
553 // Contrary to what MSDN document says, "stack_size" in _beginthreadex()
554 // does not specify stack size. Instead, it specifies the size of
555 // initially committed space. The stack size is determined by
556 // PE header in the executable. If the committed "stack_size" is larger
557 // than default value in the PE header, the stack is rounded up to the
558 // nearest multiple of 1MB. For example if the launcher has default
559 // stack size of 320k, specifying any size less than 320k does not
560 // affect the actual stack size at all, it only affects the initial
561 // commitment. On the other hand, specifying 'stack_size' larger than
562 // default value may cause significant increase in memory usage, because
563 // not only the stack space will be rounded up to MB, but also the
564 // entire space is committed upfront.
565 //
566 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION'
567 // for CreateThread() that can treat 'stack_size' as stack size. However we
568 // are not supposed to call CreateThread() directly according to MSDN
569 // document because JVM uses C runtime library. The good news is that the
570 // flag appears to work with _beginthredex() as well.
571
572 #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
573 #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000)
574 #endif
575
576 HANDLE thread_handle =
577 (HANDLE)_beginthreadex(NULL,
578 (unsigned)stack_size,
579 (unsigned (__stdcall *)(void*)) java_start,
580 thread,
581 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION,
582 &thread_id);
583 if (thread_handle == NULL) {
584 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again
585 // without the flag.
586 thread_handle =
587 (HANDLE)_beginthreadex(NULL,
588 (unsigned)stack_size,
589 (unsigned (__stdcall *)(void*)) java_start,
590 thread,
591 CREATE_SUSPENDED,
592 &thread_id);
593 }
594 if (thread_handle == NULL) {
595 // Need to clean up stuff we've allocated so far
596 CloseHandle(osthread->interrupt_event());
597 thread->set_osthread(NULL);
598 delete osthread;
599 return NULL;
600 }
601
602 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count);
603
604 // Store info on the Win32 thread into the OSThread
605 osthread->set_thread_handle(thread_handle);
606 osthread->set_thread_id(thread_id);
607
608 // Initial thread state is INITIALIZED, not SUSPENDED
609 osthread->set_state(INITIALIZED);
610
611 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
612 return true;
613 }
614
615
616 // Free Win32 resources related to the OSThread
617 void os::free_thread(OSThread* osthread) {
618 assert(osthread != NULL, "osthread not set");
619 CloseHandle(osthread->thread_handle());
620 CloseHandle(osthread->interrupt_event());
621 delete osthread;
622 }
623
624
625 static int has_performance_count = 0;
626 static jlong first_filetime;
627 static jlong initial_performance_count;
628 static jlong performance_frequency;
629
630
631 jlong as_long(LARGE_INTEGER x) {
632 jlong result = 0; // initialization to avoid warning
633 set_high(&result, x.HighPart);
634 set_low(&result, x.LowPart);
635 return result;
636 }
637
638
639 jlong os::elapsed_counter() {
640 LARGE_INTEGER count;
641 if (has_performance_count) {
642 QueryPerformanceCounter(&count);
643 return as_long(count) - initial_performance_count;
644 } else {
645 FILETIME wt;
646 GetSystemTimeAsFileTime(&wt);
647 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime);
648 }
649 }
650
651
652 jlong os::elapsed_frequency() {
653 if (has_performance_count) {
654 return performance_frequency;
655 } else {
656 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
657 return 10000000;
658 }
659 }
660
661
662 julong os::available_memory() {
663 return win32::available_memory();
664 }
665
666 julong os::win32::available_memory() {
667 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
668 // value if total memory is larger than 4GB
669 MEMORYSTATUSEX ms;
670 ms.dwLength = sizeof(ms);
671 GlobalMemoryStatusEx(&ms);
672
673 return (julong)ms.ullAvailPhys;
674 }
675
676 julong os::physical_memory() {
677 return win32::physical_memory();
678 }
679
680 julong os::allocatable_physical_memory(julong size) {
681 #ifdef _LP64
682 return size;
683 #else
684 // Limit to 1400m because of the 2gb address space wall
685 return MIN2(size, (julong)1400*M);
686 #endif
687 }
688
689 // VC6 lacks DWORD_PTR
690 #if _MSC_VER < 1300
691 typedef UINT_PTR DWORD_PTR;
692 #endif
693
694 int os::active_processor_count() {
695 DWORD_PTR lpProcessAffinityMask = 0;
696 DWORD_PTR lpSystemAffinityMask = 0;
697 int proc_count = processor_count();
698 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
699 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {
700 // Nof active processors is number of bits in process affinity mask
701 int bitcount = 0;
702 while (lpProcessAffinityMask != 0) {
703 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1);
704 bitcount++;
705 }
706 return bitcount;
707 } else {
708 return proc_count;
709 }
710 }
711
712 void os::set_native_thread_name(const char *name) {
713 // Not yet implemented.
714 return;
715 }
716
717 bool os::distribute_processes(uint length, uint* distribution) {
718 // Not yet implemented.
719 return false;
720 }
721
722 bool os::bind_to_processor(uint processor_id) {
723 // Not yet implemented.
724 return false;
725 }
726
727 static void initialize_performance_counter() {
728 LARGE_INTEGER count;
729 if (QueryPerformanceFrequency(&count)) {
730 has_performance_count = 1;
731 performance_frequency = as_long(count);
732 QueryPerformanceCounter(&count);
733 initial_performance_count = as_long(count);
734 } else {
735 has_performance_count = 0;
736 FILETIME wt;
737 GetSystemTimeAsFileTime(&wt);
738 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
739 }
740 }
741
742
743 double os::elapsedTime() {
744 return (double) elapsed_counter() / (double) elapsed_frequency();
745 }
746
747
748 // Windows format:
749 // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
750 // Java format:
751 // Java standards require the number of milliseconds since 1/1/1970
752
753 // Constant offset - calculated using offset()
754 static jlong _offset = 116444736000000000;
755 // Fake time counter for reproducible results when debugging
756 static jlong fake_time = 0;
757
758 #ifdef ASSERT
759 // Just to be safe, recalculate the offset in debug mode
760 static jlong _calculated_offset = 0;
761 static int _has_calculated_offset = 0;
762
763 jlong offset() {
764 if (_has_calculated_offset) return _calculated_offset;
765 SYSTEMTIME java_origin;
766 java_origin.wYear = 1970;
767 java_origin.wMonth = 1;
768 java_origin.wDayOfWeek = 0; // ignored
769 java_origin.wDay = 1;
770 java_origin.wHour = 0;
771 java_origin.wMinute = 0;
772 java_origin.wSecond = 0;
773 java_origin.wMilliseconds = 0;
774 FILETIME jot;
775 if (!SystemTimeToFileTime(&java_origin, &jot)) {
776 fatal(err_msg("Error = %d\nWindows error", GetLastError()));
777 }
778 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime);
779 _has_calculated_offset = 1;
780 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal");
781 return _calculated_offset;
782 }
783 #else
784 jlong offset() {
785 return _offset;
786 }
787 #endif
788
789 jlong windows_to_java_time(FILETIME wt) {
790 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
791 return (a - offset()) / 10000;
792 }
793
794 FILETIME java_to_windows_time(jlong l) {
795 jlong a = (l * 10000) + offset();
796 FILETIME result;
797 result.dwHighDateTime = high(a);
798 result.dwLowDateTime = low(a);
799 return result;
800 }
801
802 // For now, we say that Windows does not support vtime. I have no idea
803 // whether it can actually be made to (DLD, 9/13/05).
804
805 bool os::supports_vtime() { return false; }
806 bool os::enable_vtime() { return false; }
807 bool os::vtime_enabled() { return false; }
808 double os::elapsedVTime() {
809 // better than nothing, but not much
810 return elapsedTime();
811 }
812
813 jlong os::javaTimeMillis() {
814 if (UseFakeTimers) {
815 return fake_time++;
816 } else {
817 FILETIME wt;
818 GetSystemTimeAsFileTime(&wt);
819 return windows_to_java_time(wt);
820 }
821 }
822
823 jlong os::javaTimeNanos() {
824 if (!has_performance_count) {
825 return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do.
826 } else {
827 LARGE_INTEGER current_count;
828 QueryPerformanceCounter(¤t_count);
829 double current = as_long(current_count);
830 double freq = performance_frequency;
831 jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC);
832 return time;
833 }
834 }
835
836 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
837 if (!has_performance_count) {
838 // javaTimeMillis() doesn't have much percision,
839 // but it is not going to wrap -- so all 64 bits
840 info_ptr->max_value = ALL_64_BITS;
841
842 // this is a wall clock timer, so may skip
843 info_ptr->may_skip_backward = true;
844 info_ptr->may_skip_forward = true;
845 } else {
846 jlong freq = performance_frequency;
847 if (freq < NANOSECS_PER_SEC) {
848 // the performance counter is 64 bits and we will
849 // be multiplying it -- so no wrap in 64 bits
850 info_ptr->max_value = ALL_64_BITS;
851 } else if (freq > NANOSECS_PER_SEC) {
852 // use the max value the counter can reach to
853 // determine the max value which could be returned
854 julong max_counter = (julong)ALL_64_BITS;
855 info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC));
856 } else {
857 // the performance counter is 64 bits and we will
858 // be using it directly -- so no wrap in 64 bits
859 info_ptr->max_value = ALL_64_BITS;
860 }
861
862 // using a counter, so no skipping
863 info_ptr->may_skip_backward = false;
864 info_ptr->may_skip_forward = false;
865 }
866 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
867 }
868
869 char* os::local_time_string(char *buf, size_t buflen) {
870 SYSTEMTIME st;
871 GetLocalTime(&st);
872 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
873 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
874 return buf;
875 }
876
877 bool os::getTimesSecs(double* process_real_time,
878 double* process_user_time,
879 double* process_system_time) {
880 HANDLE h_process = GetCurrentProcess();
881 FILETIME create_time, exit_time, kernel_time, user_time;
882 BOOL result = GetProcessTimes(h_process,
883 &create_time,
884 &exit_time,
885 &kernel_time,
886 &user_time);
887 if (result != 0) {
888 FILETIME wt;
889 GetSystemTimeAsFileTime(&wt);
890 jlong rtc_millis = windows_to_java_time(wt);
891 jlong user_millis = windows_to_java_time(user_time);
892 jlong system_millis = windows_to_java_time(kernel_time);
893 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS);
894 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS);
895 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS);
896 return true;
897 } else {
898 return false;
899 }
900 }
901
902 void os::shutdown() {
903
904 // allow PerfMemory to attempt cleanup of any persistent resources
905 perfMemory_exit();
906
907 // flush buffered output, finish log files
908 ostream_abort();
909
910 // Check for abort hook
911 abort_hook_t abort_hook = Arguments::abort_hook();
912 if (abort_hook != NULL) {
913 abort_hook();
914 }
915 }
916
917
918 static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
919 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION);
920
921 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
922 HINSTANCE dbghelp;
923 EXCEPTION_POINTERS ep;
924 MINIDUMP_EXCEPTION_INFORMATION mei;
925 MINIDUMP_EXCEPTION_INFORMATION* pmei;
926
927 HANDLE hProcess = GetCurrentProcess();
928 DWORD processId = GetCurrentProcessId();
929 HANDLE dumpFile;
930 MINIDUMP_TYPE dumpType;
931 static const char* cwd;
932
933 // If running on a client version of Windows and user has not explicitly enabled dumping
934 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) {
935 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false);
936 return;
937 // If running on a server version of Windows and user has explictly disabled dumping
938 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) {
939 VMError::report_coredump_status("Minidump has been disabled from the command line", false);
940 return;
941 }
942
943 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0);
944
945 if (dbghelp == NULL) {
946 VMError::report_coredump_status("Failed to load dbghelp.dll", false);
947 return;
948 }
949
950 _MiniDumpWriteDump = CAST_TO_FN_PTR(
951 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
952 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION),
953 GetProcAddress(dbghelp, "MiniDumpWriteDump"));
954
955 if (_MiniDumpWriteDump == NULL) {
956 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false);
957 return;
958 }
959
960 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData);
961
962 // Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with
963 // API_VERSION_NUMBER 11 or higher contains the ones we want though
964 #if API_VERSION_NUMBER >= 11
965 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo |
966 MiniDumpWithUnloadedModules);
967 #endif
968
969 cwd = get_current_directory(NULL, 0);
970 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id());
971 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
972
973 if (dumpFile == INVALID_HANDLE_VALUE) {
974 VMError::report_coredump_status("Failed to create file for dumping", false);
975 return;
976 }
977 if (exceptionRecord != NULL && contextRecord != NULL) {
978 ep.ContextRecord = (PCONTEXT) contextRecord;
979 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord;
980
981 mei.ThreadId = GetCurrentThreadId();
982 mei.ExceptionPointers = &ep;
983 pmei = &mei;
984 } else {
985 pmei = NULL;
986 }
987
988
989 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all
990 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then.
991 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false &&
992 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) {
993 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false);
994 } else {
995 VMError::report_coredump_status(buffer, true);
996 }
997
998 CloseHandle(dumpFile);
999 }
1000
1001
1002
1003 void os::abort(bool dump_core)
1004 {
1005 os::shutdown();
1006 // no core dump on Windows
1007 ::exit(1);
1008 }
1009
1010 // Die immediately, no exit hook, no abort hook, no cleanup.
1011 void os::die() {
1012 _exit(-1);
1013 }
1014
1015 // Directory routines copied from src/win32/native/java/io/dirent_md.c
1016 // * dirent_md.c 1.15 00/02/02
1017 //
1018 // The declarations for DIR and struct dirent are in jvm_win32.h.
1019
1020 /* Caller must have already run dirname through JVM_NativePath, which removes
1021 duplicate slashes and converts all instances of '/' into '\\'. */
1022
1023 DIR *
1024 os::opendir(const char *dirname)
1025 {
1026 assert(dirname != NULL, "just checking"); // hotspot change
1027 DIR *dirp = (DIR *)malloc(sizeof(DIR));
1028 DWORD fattr; // hotspot change
1029 char alt_dirname[4] = { 0, 0, 0, 0 };
1030
1031 if (dirp == 0) {
1032 errno = ENOMEM;
1033 return 0;
1034 }
1035
1036 /*
1037 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it
1038 * as a directory in FindFirstFile(). We detect this case here and
1039 * prepend the current drive name.
1040 */
1041 if (dirname[1] == '\0' && dirname[0] == '\\') {
1042 alt_dirname[0] = _getdrive() + 'A' - 1;
1043 alt_dirname[1] = ':';
1044 alt_dirname[2] = '\\';
1045 alt_dirname[3] = '\0';
1046 dirname = alt_dirname;
1047 }
1048
1049 dirp->path = (char *)malloc(strlen(dirname) + 5);
1050 if (dirp->path == 0) {
1051 free(dirp);
1052 errno = ENOMEM;
1053 return 0;
1054 }
1055 strcpy(dirp->path, dirname);
1056
1057 fattr = GetFileAttributes(dirp->path);
1058 if (fattr == 0xffffffff) {
1059 free(dirp->path);
1060 free(dirp);
1061 errno = ENOENT;
1062 return 0;
1063 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
1064 free(dirp->path);
1065 free(dirp);
1066 errno = ENOTDIR;
1067 return 0;
1068 }
1069
1070 /* Append "*.*", or possibly "\\*.*", to path */
1071 if (dirp->path[1] == ':'
1072 && (dirp->path[2] == '\0'
1073 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) {
1074 /* No '\\' needed for cases like "Z:" or "Z:\" */
1075 strcat(dirp->path, "*.*");
1076 } else {
1077 strcat(dirp->path, "\\*.*");
1078 }
1079
1080 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data);
1081 if (dirp->handle == INVALID_HANDLE_VALUE) {
1082 if (GetLastError() != ERROR_FILE_NOT_FOUND) {
1083 free(dirp->path);
1084 free(dirp);
1085 errno = EACCES;
1086 return 0;
1087 }
1088 }
1089 return dirp;
1090 }
1091
1092 /* parameter dbuf unused on Windows */
1093
1094 struct dirent *
1095 os::readdir(DIR *dirp, dirent *dbuf)
1096 {
1097 assert(dirp != NULL, "just checking"); // hotspot change
1098 if (dirp->handle == INVALID_HANDLE_VALUE) {
1099 return 0;
1100 }
1101
1102 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName);
1103
1104 if (!FindNextFile(dirp->handle, &dirp->find_data)) {
1105 if (GetLastError() == ERROR_INVALID_HANDLE) {
1106 errno = EBADF;
1107 return 0;
1108 }
1109 FindClose(dirp->handle);
1110 dirp->handle = INVALID_HANDLE_VALUE;
1111 }
1112
1113 return &dirp->dirent;
1114 }
1115
1116 int
1117 os::closedir(DIR *dirp)
1118 {
1119 assert(dirp != NULL, "just checking"); // hotspot change
1120 if (dirp->handle != INVALID_HANDLE_VALUE) {
1121 if (!FindClose(dirp->handle)) {
1122 errno = EBADF;
1123 return -1;
1124 }
1125 dirp->handle = INVALID_HANDLE_VALUE;
1126 }
1127 free(dirp->path);
1128 free(dirp);
1129 return 0;
1130 }
1131
1132 // This must be hard coded because it's the system's temporary
1133 // directory not the java application's temp directory, ala java.io.tmpdir.
1134 const char* os::get_temp_directory() {
1135 static char path_buf[MAX_PATH];
1136 if (GetTempPath(MAX_PATH, path_buf)>0)
1137 return path_buf;
1138 else{
1139 path_buf[0]='\0';
1140 return path_buf;
1141 }
1142 }
1143
1144 static bool file_exists(const char* filename) {
1145 if (filename == NULL || strlen(filename) == 0) {
1146 return false;
1147 }
1148 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES;
1149 }
1150
1151 void os::dll_build_name(char *buffer, size_t buflen,
1152 const char* pname, const char* fname) {
1153 const size_t pnamelen = pname ? strlen(pname) : 0;
1154 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0;
1155
1156 // Quietly truncates on buffer overflow. Should be an error.
1157 if (pnamelen + strlen(fname) + 10 > buflen) {
1158 *buffer = '\0';
1159 return;
1160 }
1161
1162 if (pnamelen == 0) {
1163 jio_snprintf(buffer, buflen, "%s.dll", fname);
1164 } else if (c == ':' || c == '\\') {
1165 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname);
1166 } else if (strchr(pname, *os::path_separator()) != NULL) {
1167 int n;
1168 char** pelements = split_path(pname, &n);
1169 for (int i = 0 ; i < n ; i++) {
1170 char* path = pelements[i];
1171 // Really shouldn't be NULL, but check can't hurt
1172 size_t plen = (path == NULL) ? 0 : strlen(path);
1173 if (plen == 0) {
1174 continue; // skip the empty path values
1175 }
1176 const char lastchar = path[plen - 1];
1177 if (lastchar == ':' || lastchar == '\\') {
1178 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname);
1179 } else {
1180 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname);
1181 }
1182 if (file_exists(buffer)) {
1183 break;
1184 }
1185 }
1186 // release the storage
1187 for (int i = 0 ; i < n ; i++) {
1188 if (pelements[i] != NULL) {
1189 FREE_C_HEAP_ARRAY(char, pelements[i]);
1190 }
1191 }
1192 if (pelements != NULL) {
1193 FREE_C_HEAP_ARRAY(char*, pelements);
1194 }
1195 } else {
1196 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname);
1197 }
1198 }
1199
1200 // Needs to be in os specific directory because windows requires another
1201 // header file <direct.h>
1202 const char* os::get_current_directory(char *buf, int buflen) {
1203 return _getcwd(buf, buflen);
1204 }
1205
1206 //-----------------------------------------------------------
1207 // Helper functions for fatal error handler
1208 #ifdef _WIN64
1209 // Helper routine which returns true if address in
1210 // within the NTDLL address space.
1211 //
1212 static bool _addr_in_ntdll( address addr )
1213 {
1214 HMODULE hmod;
1215 MODULEINFO minfo;
1216
1217 hmod = GetModuleHandle("NTDLL.DLL");
1218 if ( hmod == NULL ) return false;
1219 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod,
1220 &minfo, sizeof(MODULEINFO)) )
1221 return false;
1222
1223 if ( (addr >= minfo.lpBaseOfDll) &&
1224 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage)))
1225 return true;
1226 else
1227 return false;
1228 }
1229 #endif
1230
1231
1232 // Enumerate all modules for a given process ID
1233 //
1234 // Notice that Windows 95/98/Me and Windows NT/2000/XP have
1235 // different API for doing this. We use PSAPI.DLL on NT based
1236 // Windows and ToolHelp on 95/98/Me.
1237
1238 // Callback function that is called by enumerate_modules() on
1239 // every DLL module.
1240 // Input parameters:
1241 // int pid,
1242 // char* module_file_name,
1243 // address module_base_addr,
1244 // unsigned module_size,
1245 // void* param
1246 typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *);
1247
1248 // enumerate_modules for Windows NT, using PSAPI
1249 static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param)
1250 {
1251 HANDLE hProcess ;
1252
1253 # define MAX_NUM_MODULES 128
1254 HMODULE modules[MAX_NUM_MODULES];
1255 static char filename[ MAX_PATH ];
1256 int result = 0;
1257
1258 if (!os::PSApiDll::PSApiAvailable()) {
1259 return 0;
1260 }
1261
1262 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
1263 FALSE, pid ) ;
1264 if (hProcess == NULL) return 0;
1265
1266 DWORD size_needed;
1267 if (!os::PSApiDll::EnumProcessModules(hProcess, modules,
1268 sizeof(modules), &size_needed)) {
1269 CloseHandle( hProcess );
1270 return 0;
1271 }
1272
1273 // number of modules that are currently loaded
1274 int num_modules = size_needed / sizeof(HMODULE);
1275
1276 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) {
1277 // Get Full pathname:
1278 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i],
1279 filename, sizeof(filename))) {
1280 filename[0] = '\0';
1281 }
1282
1283 MODULEINFO modinfo;
1284 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i],
1285 &modinfo, sizeof(modinfo))) {
1286 modinfo.lpBaseOfDll = NULL;
1287 modinfo.SizeOfImage = 0;
1288 }
1289
1290 // Invoke callback function
1291 result = func(pid, filename, (address)modinfo.lpBaseOfDll,
1292 modinfo.SizeOfImage, param);
1293 if (result) break;
1294 }
1295
1296 CloseHandle( hProcess ) ;
1297 return result;
1298 }
1299
1300
1301 // enumerate_modules for Windows 95/98/ME, using TOOLHELP
1302 static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param)
1303 {
1304 HANDLE hSnapShot ;
1305 static MODULEENTRY32 modentry ;
1306 int result = 0;
1307
1308 if (!os::Kernel32Dll::HelpToolsAvailable()) {
1309 return 0;
1310 }
1311
1312 // Get a handle to a Toolhelp snapshot of the system
1313 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ;
1314 if( hSnapShot == INVALID_HANDLE_VALUE ) {
1315 return FALSE ;
1316 }
1317
1318 // iterate through all modules
1319 modentry.dwSize = sizeof(MODULEENTRY32) ;
1320 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0;
1321
1322 while( not_done ) {
1323 // invoke the callback
1324 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr,
1325 modentry.modBaseSize, param);
1326 if (result) break;
1327
1328 modentry.dwSize = sizeof(MODULEENTRY32) ;
1329 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0;
1330 }
1331
1332 CloseHandle(hSnapShot);
1333 return result;
1334 }
1335
1336 int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param )
1337 {
1338 // Get current process ID if caller doesn't provide it.
1339 if (!pid) pid = os::current_process_id();
1340
1341 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param);
1342 else return _enumerate_modules_windows(pid, func, param);
1343 }
1344
1345 struct _modinfo {
1346 address addr;
1347 char* full_path; // point to a char buffer
1348 int buflen; // size of the buffer
1349 address base_addr;
1350 };
1351
1352 static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr,
1353 unsigned size, void * param) {
1354 struct _modinfo *pmod = (struct _modinfo *)param;
1355 if (!pmod) return -1;
1356
1357 if (base_addr <= pmod->addr &&
1358 base_addr+size > pmod->addr) {
1359 // if a buffer is provided, copy path name to the buffer
1360 if (pmod->full_path) {
1361 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname);
1362 }
1363 pmod->base_addr = base_addr;
1364 return 1;
1365 }
1366 return 0;
1367 }
1368
1369 bool os::dll_address_to_library_name(address addr, char* buf,
1370 int buflen, int* offset) {
1371 // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
1372 // return the full path to the DLL file, sometimes it returns path
1373 // to the corresponding PDB file (debug info); sometimes it only
1374 // returns partial path, which makes life painful.
1375
1376 struct _modinfo mi;
1377 mi.addr = addr;
1378 mi.full_path = buf;
1379 mi.buflen = buflen;
1380 int pid = os::current_process_id();
1381 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
1382 // buf already contains path name
1383 if (offset) *offset = addr - mi.base_addr;
1384 return true;
1385 } else {
1386 if (buf) buf[0] = '\0';
1387 if (offset) *offset = -1;
1388 return false;
1389 }
1390 }
1391
1392 bool os::dll_address_to_function_name(address addr, char *buf,
1393 int buflen, int *offset) {
1394 if (Decoder::decode(addr, buf, buflen, offset)) {
1395 return true;
1396 }
1397 if (offset != NULL) *offset = -1;
1398 if (buf != NULL) buf[0] = '\0';
1399 return false;
1400 }
1401
1402 // save the start and end address of jvm.dll into param[0] and param[1]
1403 static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr,
1404 unsigned size, void * param) {
1405 if (!param) return -1;
1406
1407 if (base_addr <= (address)_locate_jvm_dll &&
1408 base_addr+size > (address)_locate_jvm_dll) {
1409 ((address*)param)[0] = base_addr;
1410 ((address*)param)[1] = base_addr + size;
1411 return 1;
1412 }
1413 return 0;
1414 }
1415
1416 address vm_lib_location[2]; // start and end address of jvm.dll
1417
1418 // check if addr is inside jvm.dll
1419 bool os::address_is_in_vm(address addr) {
1420 if (!vm_lib_location[0] || !vm_lib_location[1]) {
1421 int pid = os::current_process_id();
1422 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) {
1423 assert(false, "Can't find jvm module.");
1424 return false;
1425 }
1426 }
1427
1428 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]);
1429 }
1430
1431 // print module info; param is outputStream*
1432 static int _print_module(int pid, char* fname, address base,
1433 unsigned size, void* param) {
1434 if (!param) return -1;
1435
1436 outputStream* st = (outputStream*)param;
1437
1438 address end_addr = base + size;
1439 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname);
1440 return 0;
1441 }
1442
1443 // Loads .dll/.so and
1444 // in case of error it checks if .dll/.so was built for the
1445 // same architecture as Hotspot is running on
1446 void * os::dll_load(const char *name, char *ebuf, int ebuflen)
1447 {
1448 void * result = LoadLibrary(name);
1449 if (result != NULL)
1450 {
1451 return result;
1452 }
1453
1454 DWORD errcode = GetLastError();
1455 if (errcode == ERROR_MOD_NOT_FOUND) {
1456 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
1457 ebuf[ebuflen-1]='\0';
1458 return NULL;
1459 }
1460
1461 // Parsing dll below
1462 // If we can read dll-info and find that dll was built
1463 // for an architecture other than Hotspot is running in
1464 // - then print to buffer "DLL was built for a different architecture"
1465 // else call os::lasterror to obtain system error message
1466
1467 // Read system error message into ebuf
1468 // It may or may not be overwritten below (in the for loop and just above)
1469 lasterror(ebuf, (size_t) ebuflen);
1470 ebuf[ebuflen-1]='\0';
1471 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0);
1472 if (file_descriptor<0)
1473 {
1474 return NULL;
1475 }
1476
1477 uint32_t signature_offset;
1478 uint16_t lib_arch=0;
1479 bool failed_to_get_lib_arch=
1480 (
1481 //Go to position 3c in the dll
1482 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0)
1483 ||
1484 // Read loacation of signature
1485 (sizeof(signature_offset)!=
1486 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset))))
1487 ||
1488 //Go to COFF File Header in dll
1489 //that is located after"signature" (4 bytes long)
1490 (os::seek_to_file_offset(file_descriptor,
1491 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0)
1492 ||
1493 //Read field that contains code of architecture
1494 // that dll was build for
1495 (sizeof(lib_arch)!=
1496 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch))))
1497 );
1498
1499 ::close(file_descriptor);
1500 if (failed_to_get_lib_arch)
1501 {
1502 // file i/o error - report os::lasterror(...) msg
1503 return NULL;
1504 }
1505
1506 typedef struct
1507 {
1508 uint16_t arch_code;
1509 char* arch_name;
1510 } arch_t;
1511
1512 static const arch_t arch_array[]={
1513 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"},
1514 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"},
1515 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"}
1516 };
1517 #if (defined _M_IA64)
1518 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64;
1519 #elif (defined _M_AMD64)
1520 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64;
1521 #elif (defined _M_IX86)
1522 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386;
1523 #else
1524 #error Method os::dll_load requires that one of following \
1525 is defined :_M_IA64,_M_AMD64 or _M_IX86
1526 #endif
1527
1528
1529 // Obtain a string for printf operation
1530 // lib_arch_str shall contain string what platform this .dll was built for
1531 // running_arch_str shall string contain what platform Hotspot was built for
1532 char *running_arch_str=NULL,*lib_arch_str=NULL;
1533 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++)
1534 {
1535 if (lib_arch==arch_array[i].arch_code)
1536 lib_arch_str=arch_array[i].arch_name;
1537 if (running_arch==arch_array[i].arch_code)
1538 running_arch_str=arch_array[i].arch_name;
1539 }
1540
1541 assert(running_arch_str,
1542 "Didn't find runing architecture code in arch_array");
1543
1544 // If the architure is right
1545 // but some other error took place - report os::lasterror(...) msg
1546 if (lib_arch == running_arch)
1547 {
1548 return NULL;
1549 }
1550
1551 if (lib_arch_str!=NULL)
1552 {
1553 ::_snprintf(ebuf, ebuflen-1,
1554 "Can't load %s-bit .dll on a %s-bit platform",
1555 lib_arch_str,running_arch_str);
1556 }
1557 else
1558 {
1559 // don't know what architecture this dll was build for
1560 ::_snprintf(ebuf, ebuflen-1,
1561 "Can't load this .dll (machine code=0x%x) on a %s-bit platform",
1562 lib_arch,running_arch_str);
1563 }
1564
1565 return NULL;
1566 }
1567
1568
1569 void os::print_dll_info(outputStream *st) {
1570 int pid = os::current_process_id();
1571 st->print_cr("Dynamic libraries:");
1572 enumerate_modules(pid, _print_module, (void *)st);
1573 }
1574
1575 void os::print_os_info(outputStream* st) {
1576 st->print("OS:");
1577
1578 OSVERSIONINFOEX osvi;
1579 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
1580 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
1581
1582 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) {
1583 st->print_cr("N/A");
1584 return;
1585 }
1586
1587 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
1588 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
1589 switch (os_vers) {
1590 case 3051: st->print(" Windows NT 3.51"); break;
1591 case 4000: st->print(" Windows NT 4.0"); break;
1592 case 5000: st->print(" Windows 2000"); break;
1593 case 5001: st->print(" Windows XP"); break;
1594 case 5002:
1595 case 6000:
1596 case 6001: {
1597 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
1598 // find out whether we are running on 64 bit processor or not.
1599 SYSTEM_INFO si;
1600 ZeroMemory(&si, sizeof(SYSTEM_INFO));
1601 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){
1602 GetSystemInfo(&si);
1603 } else {
1604 os::Kernel32Dll::GetNativeSystemInfo(&si);
1605 }
1606 if (os_vers == 5002) {
1607 if (osvi.wProductType == VER_NT_WORKSTATION &&
1608 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1609 st->print(" Windows XP x64 Edition");
1610 else
1611 st->print(" Windows Server 2003 family");
1612 } else if (os_vers == 6000) {
1613 if (osvi.wProductType == VER_NT_WORKSTATION)
1614 st->print(" Windows Vista");
1615 else
1616 st->print(" Windows Server 2008");
1617 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1618 st->print(" , 64 bit");
1619 } else if (os_vers == 6001) {
1620 if (osvi.wProductType == VER_NT_WORKSTATION) {
1621 st->print(" Windows 7");
1622 } else {
1623 // Unrecognized windows, print out its major and minor versions
1624 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1625 }
1626 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1627 st->print(" , 64 bit");
1628 } else { // future os
1629 // Unrecognized windows, print out its major and minor versions
1630 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1631 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1632 st->print(" , 64 bit");
1633 }
1634 break;
1635 }
1636 default: // future windows, print out its major and minor versions
1637 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1638 }
1639 } else {
1640 switch (os_vers) {
1641 case 4000: st->print(" Windows 95"); break;
1642 case 4010: st->print(" Windows 98"); break;
1643 case 4090: st->print(" Windows Me"); break;
1644 default: // future windows, print out its major and minor versions
1645 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1646 }
1647 }
1648 st->print(" Build %d", osvi.dwBuildNumber);
1649 st->print(" %s", osvi.szCSDVersion); // service pack
1650 st->cr();
1651 }
1652
1653 void os::pd_print_cpu_info(outputStream* st) {
1654 // Nothing to do for now.
1655 }
1656
1657 void os::print_memory_info(outputStream* st) {
1658 st->print("Memory:");
1659 st->print(" %dk page", os::vm_page_size()>>10);
1660
1661 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
1662 // value if total memory is larger than 4GB
1663 MEMORYSTATUSEX ms;
1664 ms.dwLength = sizeof(ms);
1665 GlobalMemoryStatusEx(&ms);
1666
1667 st->print(", physical %uk", os::physical_memory() >> 10);
1668 st->print("(%uk free)", os::available_memory() >> 10);
1669
1670 st->print(", swap %uk", ms.ullTotalPageFile >> 10);
1671 st->print("(%uk free)", ms.ullAvailPageFile >> 10);
1672 st->cr();
1673 }
1674
1675 void os::print_siginfo(outputStream *st, void *siginfo) {
1676 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo;
1677 st->print("siginfo:");
1678 st->print(" ExceptionCode=0x%x", er->ExceptionCode);
1679
1680 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
1681 er->NumberParameters >= 2) {
1682 switch (er->ExceptionInformation[0]) {
1683 case 0: st->print(", reading address"); break;
1684 case 1: st->print(", writing address"); break;
1685 default: st->print(", ExceptionInformation=" INTPTR_FORMAT,
1686 er->ExceptionInformation[0]);
1687 }
1688 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]);
1689 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR &&
1690 er->NumberParameters >= 2 && UseSharedSpaces) {
1691 FileMapInfo* mapinfo = FileMapInfo::current_info();
1692 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) {
1693 st->print("\n\nError accessing class data sharing archive." \
1694 " Mapped file inaccessible during execution, " \
1695 " possible disk/network problem.");
1696 }
1697 } else {
1698 int num = er->NumberParameters;
1699 if (num > 0) {
1700 st->print(", ExceptionInformation=");
1701 for (int i = 0; i < num; i++) {
1702 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]);
1703 }
1704 }
1705 }
1706 st->cr();
1707 }
1708
1709 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
1710 // do nothing
1711 }
1712
1713 static char saved_jvm_path[MAX_PATH] = {0};
1714
1715 // Find the full path to the current module, jvm.dll or jvm_g.dll
1716 void os::jvm_path(char *buf, jint buflen) {
1717 // Error checking.
1718 if (buflen < MAX_PATH) {
1719 assert(false, "must use a large-enough buffer");
1720 buf[0] = '\0';
1721 return;
1722 }
1723 // Lazy resolve the path to current module.
1724 if (saved_jvm_path[0] != 0) {
1725 strcpy(buf, saved_jvm_path);
1726 return;
1727 }
1728
1729 buf[0] = '\0';
1730 if (Arguments::created_by_gamma_launcher()) {
1731 // Support for the gamma launcher. Check for an
1732 // JAVA_HOME environment variable
1733 // and fix up the path so it looks like
1734 // libjvm.so is installed there (append a fake suffix
1735 // hotspot/libjvm.so).
1736 char* java_home_var = ::getenv("JAVA_HOME");
1737 if (java_home_var != NULL && java_home_var[0] != 0) {
1738
1739 strncpy(buf, java_home_var, buflen);
1740
1741 // determine if this is a legacy image or modules image
1742 // modules image doesn't have "jre" subdirectory
1743 size_t len = strlen(buf);
1744 char* jrebin_p = buf + len;
1745 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\");
1746 if (0 != _access(buf, 0)) {
1747 jio_snprintf(jrebin_p, buflen-len, "\\bin\\");
1748 }
1749 len = strlen(buf);
1750 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll");
1751 }
1752 }
1753
1754 if(buf[0] == '\0') {
1755 GetModuleFileName(vm_lib_handle, buf, buflen);
1756 }
1757 strcpy(saved_jvm_path, buf);
1758 }
1759
1760
1761 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
1762 #ifndef _WIN64
1763 st->print("_");
1764 #endif
1765 }
1766
1767
1768 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
1769 #ifndef _WIN64
1770 st->print("@%d", args_size * sizeof(int));
1771 #endif
1772 }
1773
1774 // This method is a copy of JDK's sysGetLastErrorString
1775 // from src/windows/hpi/src/system_md.c
1776
1777 size_t os::lasterror(char* buf, size_t len) {
1778 DWORD errval;
1779
1780 if ((errval = GetLastError()) != 0) {
1781 // DOS error
1782 size_t n = (size_t)FormatMessage(
1783 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
1784 NULL,
1785 errval,
1786 0,
1787 buf,
1788 (DWORD)len,
1789 NULL);
1790 if (n > 3) {
1791 // Drop final '.', CR, LF
1792 if (buf[n - 1] == '\n') n--;
1793 if (buf[n - 1] == '\r') n--;
1794 if (buf[n - 1] == '.') n--;
1795 buf[n] = '\0';
1796 }
1797 return n;
1798 }
1799
1800 if (errno != 0) {
1801 // C runtime error that has no corresponding DOS error code
1802 const char* s = strerror(errno);
1803 size_t n = strlen(s);
1804 if (n >= len) n = len - 1;
1805 strncpy(buf, s, n);
1806 buf[n] = '\0';
1807 return n;
1808 }
1809
1810 return 0;
1811 }
1812
1813 int os::get_last_error() {
1814 DWORD error = GetLastError();
1815 if (error == 0)
1816 error = errno;
1817 return (int)error;
1818 }
1819
1820 // sun.misc.Signal
1821 // NOTE that this is a workaround for an apparent kernel bug where if
1822 // a signal handler for SIGBREAK is installed then that signal handler
1823 // takes priority over the console control handler for CTRL_CLOSE_EVENT.
1824 // See bug 4416763.
1825 static void (*sigbreakHandler)(int) = NULL;
1826
1827 static void UserHandler(int sig, void *siginfo, void *context) {
1828 os::signal_notify(sig);
1829 // We need to reinstate the signal handler each time...
1830 os::signal(sig, (void*)UserHandler);
1831 }
1832
1833 void* os::user_handler() {
1834 return (void*) UserHandler;
1835 }
1836
1837 void* os::signal(int signal_number, void* handler) {
1838 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) {
1839 void (*oldHandler)(int) = sigbreakHandler;
1840 sigbreakHandler = (void (*)(int)) handler;
1841 return (void*) oldHandler;
1842 } else {
1843 return (void*)::signal(signal_number, (void (*)(int))handler);
1844 }
1845 }
1846
1847 void os::signal_raise(int signal_number) {
1848 raise(signal_number);
1849 }
1850
1851 // The Win32 C runtime library maps all console control events other than ^C
1852 // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close,
1853 // logoff, and shutdown events. We therefore install our own console handler
1854 // that raises SIGTERM for the latter cases.
1855 //
1856 static BOOL WINAPI consoleHandler(DWORD event) {
1857 switch(event) {
1858 case CTRL_C_EVENT:
1859 if (is_error_reported()) {
1860 // Ctrl-C is pressed during error reporting, likely because the error
1861 // handler fails to abort. Let VM die immediately.
1862 os::die();
1863 }
1864
1865 os::signal_raise(SIGINT);
1866 return TRUE;
1867 break;
1868 case CTRL_BREAK_EVENT:
1869 if (sigbreakHandler != NULL) {
1870 (*sigbreakHandler)(SIGBREAK);
1871 }
1872 return TRUE;
1873 break;
1874 case CTRL_CLOSE_EVENT:
1875 case CTRL_LOGOFF_EVENT:
1876 case CTRL_SHUTDOWN_EVENT:
1877 os::signal_raise(SIGTERM);
1878 return TRUE;
1879 break;
1880 default:
1881 break;
1882 }
1883 return FALSE;
1884 }
1885
1886 /*
1887 * The following code is moved from os.cpp for making this
1888 * code platform specific, which it is by its very nature.
1889 */
1890
1891 // Return maximum OS signal used + 1 for internal use only
1892 // Used as exit signal for signal_thread
1893 int os::sigexitnum_pd(){
1894 return NSIG;
1895 }
1896
1897 // a counter for each possible signal value, including signal_thread exit signal
1898 static volatile jint pending_signals[NSIG+1] = { 0 };
1899 static HANDLE sig_sem;
1900
1901 void os::signal_init_pd() {
1902 // Initialize signal structures
1903 memset((void*)pending_signals, 0, sizeof(pending_signals));
1904
1905 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL);
1906
1907 // Programs embedding the VM do not want it to attempt to receive
1908 // events like CTRL_LOGOFF_EVENT, which are used to implement the
1909 // shutdown hooks mechanism introduced in 1.3. For example, when
1910 // the VM is run as part of a Windows NT service (i.e., a servlet
1911 // engine in a web server), the correct behavior is for any console
1912 // control handler to return FALSE, not TRUE, because the OS's
1913 // "final" handler for such events allows the process to continue if
1914 // it is a service (while terminating it if it is not a service).
1915 // To make this behavior uniform and the mechanism simpler, we
1916 // completely disable the VM's usage of these console events if -Xrs
1917 // (=ReduceSignalUsage) is specified. This means, for example, that
1918 // the CTRL-BREAK thread dump mechanism is also disabled in this
1919 // case. See bugs 4323062, 4345157, and related bugs.
1920
1921 if (!ReduceSignalUsage) {
1922 // Add a CTRL-C handler
1923 SetConsoleCtrlHandler(consoleHandler, TRUE);
1924 }
1925 }
1926
1927 void os::signal_notify(int signal_number) {
1928 BOOL ret;
1929
1930 Atomic::inc(&pending_signals[signal_number]);
1931 ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
1932 assert(ret != 0, "ReleaseSemaphore() failed");
1933 }
1934
1935 static int check_pending_signals(bool wait_for_signal) {
1936 DWORD ret;
1937 while (true) {
1938 for (int i = 0; i < NSIG + 1; i++) {
1939 jint n = pending_signals[i];
1940 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
1941 return i;
1942 }
1943 }
1944 if (!wait_for_signal) {
1945 return -1;
1946 }
1947
1948 JavaThread *thread = JavaThread::current();
1949
1950 ThreadBlockInVM tbivm(thread);
1951
1952 bool threadIsSuspended;
1953 do {
1954 thread->set_suspend_equivalent();
1955 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
1956 ret = ::WaitForSingleObject(sig_sem, INFINITE);
1957 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed");
1958
1959 // were we externally suspended while we were waiting?
1960 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
1961 if (threadIsSuspended) {
1962 //
1963 // The semaphore has been incremented, but while we were waiting
1964 // another thread suspended us. We don't want to continue running
1965 // while suspended because that would surprise the thread that
1966 // suspended us.
1967 //
1968 ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
1969 assert(ret != 0, "ReleaseSemaphore() failed");
1970
1971 thread->java_suspend_self();
1972 }
1973 } while (threadIsSuspended);
1974 }
1975 }
1976
1977 int os::signal_lookup() {
1978 return check_pending_signals(false);
1979 }
1980
1981 int os::signal_wait() {
1982 return check_pending_signals(true);
1983 }
1984
1985 // Implicit OS exception handling
1986
1987 LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) {
1988 JavaThread* thread = JavaThread::current();
1989 // Save pc in thread
1990 #ifdef _M_IA64
1991 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP);
1992 // Set pc to handler
1993 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler;
1994 #elif _M_AMD64
1995 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip);
1996 // Set pc to handler
1997 exceptionInfo->ContextRecord->Rip = (DWORD64)handler;
1998 #else
1999 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip);
2000 // Set pc to handler
2001 exceptionInfo->ContextRecord->Eip = (LONG)handler;
2002 #endif
2003
2004 // Continue the execution
2005 return EXCEPTION_CONTINUE_EXECUTION;
2006 }
2007
2008
2009 // Used for PostMortemDump
2010 extern "C" void safepoints();
2011 extern "C" void find(int x);
2012 extern "C" void events();
2013
2014 // According to Windows API documentation, an illegal instruction sequence should generate
2015 // the 0xC000001C exception code. However, real world experience shows that occasionnaly
2016 // the execution of an illegal instruction can generate the exception code 0xC000001E. This
2017 // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems).
2018
2019 #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E
2020
2021 // From "Execution Protection in the Windows Operating System" draft 0.35
2022 // Once a system header becomes available, the "real" define should be
2023 // included or copied here.
2024 #define EXCEPTION_INFO_EXEC_VIOLATION 0x08
2025
2026 #define def_excpt(val) #val, val
2027
2028 struct siglabel {
2029 char *name;
2030 int number;
2031 };
2032
2033 // All Visual C++ exceptions thrown from code generated by the Microsoft Visual
2034 // C++ compiler contain this error code. Because this is a compiler-generated
2035 // error, the code is not listed in the Win32 API header files.
2036 // The code is actually a cryptic mnemonic device, with the initial "E"
2037 // standing for "exception" and the final 3 bytes (0x6D7363) representing the
2038 // ASCII values of "msc".
2039
2040 #define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363
2041
2042
2043 struct siglabel exceptlabels[] = {
2044 def_excpt(EXCEPTION_ACCESS_VIOLATION),
2045 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
2046 def_excpt(EXCEPTION_BREAKPOINT),
2047 def_excpt(EXCEPTION_SINGLE_STEP),
2048 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED),
2049 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND),
2050 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO),
2051 def_excpt(EXCEPTION_FLT_INEXACT_RESULT),
2052 def_excpt(EXCEPTION_FLT_INVALID_OPERATION),
2053 def_excpt(EXCEPTION_FLT_OVERFLOW),
2054 def_excpt(EXCEPTION_FLT_STACK_CHECK),
2055 def_excpt(EXCEPTION_FLT_UNDERFLOW),
2056 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO),
2057 def_excpt(EXCEPTION_INT_OVERFLOW),
2058 def_excpt(EXCEPTION_PRIV_INSTRUCTION),
2059 def_excpt(EXCEPTION_IN_PAGE_ERROR),
2060 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION),
2061 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2),
2062 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION),
2063 def_excpt(EXCEPTION_STACK_OVERFLOW),
2064 def_excpt(EXCEPTION_INVALID_DISPOSITION),
2065 def_excpt(EXCEPTION_GUARD_PAGE),
2066 def_excpt(EXCEPTION_INVALID_HANDLE),
2067 def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION),
2068 NULL, 0
2069 };
2070
2071 const char* os::exception_name(int exception_code, char *buf, size_t size) {
2072 for (int i = 0; exceptlabels[i].name != NULL; i++) {
2073 if (exceptlabels[i].number == exception_code) {
2074 jio_snprintf(buf, size, "%s", exceptlabels[i].name);
2075 return buf;
2076 }
2077 }
2078
2079 return NULL;
2080 }
2081
2082 //-----------------------------------------------------------------------------
2083 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2084 // handle exception caused by idiv; should only happen for -MinInt/-1
2085 // (division by zero is handled explicitly)
2086 #ifdef _M_IA64
2087 assert(0, "Fix Handle_IDiv_Exception");
2088 #elif _M_AMD64
2089 PCONTEXT ctx = exceptionInfo->ContextRecord;
2090 address pc = (address)ctx->Rip;
2091 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc));
2092 assert(pc[0] == 0xF7, "not an idiv opcode");
2093 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2094 assert(ctx->Rax == min_jint, "unexpected idiv exception");
2095 // set correct result values and continue after idiv instruction
2096 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2097 ctx->Rax = (DWORD)min_jint; // result
2098 ctx->Rdx = (DWORD)0; // remainder
2099 // Continue the execution
2100 #else
2101 PCONTEXT ctx = exceptionInfo->ContextRecord;
2102 address pc = (address)ctx->Eip;
2103 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc));
2104 assert(pc[0] == 0xF7, "not an idiv opcode");
2105 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2106 assert(ctx->Eax == min_jint, "unexpected idiv exception");
2107 // set correct result values and continue after idiv instruction
2108 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2109 ctx->Eax = (DWORD)min_jint; // result
2110 ctx->Edx = (DWORD)0; // remainder
2111 // Continue the execution
2112 #endif
2113 return EXCEPTION_CONTINUE_EXECUTION;
2114 }
2115
2116 #ifndef _WIN64
2117 //-----------------------------------------------------------------------------
2118 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2119 // handle exception caused by native method modifying control word
2120 PCONTEXT ctx = exceptionInfo->ContextRecord;
2121 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2122
2123 switch (exception_code) {
2124 case EXCEPTION_FLT_DENORMAL_OPERAND:
2125 case EXCEPTION_FLT_DIVIDE_BY_ZERO:
2126 case EXCEPTION_FLT_INEXACT_RESULT:
2127 case EXCEPTION_FLT_INVALID_OPERATION:
2128 case EXCEPTION_FLT_OVERFLOW:
2129 case EXCEPTION_FLT_STACK_CHECK:
2130 case EXCEPTION_FLT_UNDERFLOW:
2131 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std());
2132 if (fp_control_word != ctx->FloatSave.ControlWord) {
2133 // Restore FPCW and mask out FLT exceptions
2134 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0;
2135 // Mask out pending FLT exceptions
2136 ctx->FloatSave.StatusWord &= 0xffffff00;
2137 return EXCEPTION_CONTINUE_EXECUTION;
2138 }
2139 }
2140
2141 if (prev_uef_handler != NULL) {
2142 // We didn't handle this exception so pass it to the previous
2143 // UnhandledExceptionFilter.
2144 return (prev_uef_handler)(exceptionInfo);
2145 }
2146
2147 return EXCEPTION_CONTINUE_SEARCH;
2148 }
2149 #else //_WIN64
2150 /*
2151 On Windows, the mxcsr control bits are non-volatile across calls
2152 See also CR 6192333
2153 If EXCEPTION_FLT_* happened after some native method modified
2154 mxcsr - it is not a jvm fault.
2155 However should we decide to restore of mxcsr after a faulty
2156 native method we can uncomment following code
2157 jint MxCsr = INITIAL_MXCSR;
2158 // we can't use StubRoutines::addr_mxcsr_std()
2159 // because in Win64 mxcsr is not saved there
2160 if (MxCsr != ctx->MxCsr) {
2161 ctx->MxCsr = MxCsr;
2162 return EXCEPTION_CONTINUE_EXECUTION;
2163 }
2164
2165 */
2166 #endif //_WIN64
2167
2168
2169 // Fatal error reporting is single threaded so we can make this a
2170 // static and preallocated. If it's more than MAX_PATH silently ignore
2171 // it.
2172 static char saved_error_file[MAX_PATH] = {0};
2173
2174 void os::set_error_file(const char *logfile) {
2175 if (strlen(logfile) <= MAX_PATH) {
2176 strncpy(saved_error_file, logfile, MAX_PATH);
2177 }
2178 }
2179
2180 static inline void report_error(Thread* t, DWORD exception_code,
2181 address addr, void* siginfo, void* context) {
2182 VMError err(t, exception_code, addr, siginfo, context);
2183 err.report_and_die();
2184
2185 // If UseOsErrorReporting, this will return here and save the error file
2186 // somewhere where we can find it in the minidump.
2187 }
2188
2189 //-----------------------------------------------------------------------------
2190 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
2191 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH;
2192 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2193 #ifdef _M_IA64
2194 address pc = (address) exceptionInfo->ContextRecord->StIIP;
2195 #elif _M_AMD64
2196 address pc = (address) exceptionInfo->ContextRecord->Rip;
2197 #else
2198 address pc = (address) exceptionInfo->ContextRecord->Eip;
2199 #endif
2200 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady
2201
2202 #ifndef _WIN64
2203 // Execution protection violation - win32 running on AMD64 only
2204 // Handled first to avoid misdiagnosis as a "normal" access violation;
2205 // This is safe to do because we have a new/unique ExceptionInformation
2206 // code for this condition.
2207 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2208 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2209 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0];
2210 address addr = (address) exceptionRecord->ExceptionInformation[1];
2211
2212 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) {
2213 int page_size = os::vm_page_size();
2214
2215 // Make sure the pc and the faulting address are sane.
2216 //
2217 // If an instruction spans a page boundary, and the page containing
2218 // the beginning of the instruction is executable but the following
2219 // page is not, the pc and the faulting address might be slightly
2220 // different - we still want to unguard the 2nd page in this case.
2221 //
2222 // 15 bytes seems to be a (very) safe value for max instruction size.
2223 bool pc_is_near_addr =
2224 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
2225 bool instr_spans_page_boundary =
2226 (align_size_down((intptr_t) pc ^ (intptr_t) addr,
2227 (intptr_t) page_size) > 0);
2228
2229 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
2230 static volatile address last_addr =
2231 (address) os::non_memory_address_word();
2232
2233 // In conservative mode, don't unguard unless the address is in the VM
2234 if (UnguardOnExecutionViolation > 0 && addr != last_addr &&
2235 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
2236
2237 // Set memory to RWX and retry
2238 address page_start =
2239 (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
2240 bool res = os::protect_memory((char*) page_start, page_size,
2241 os::MEM_PROT_RWX);
2242
2243 if (PrintMiscellaneous && Verbose) {
2244 char buf[256];
2245 jio_snprintf(buf, sizeof(buf), "Execution protection violation "
2246 "at " INTPTR_FORMAT
2247 ", unguarding " INTPTR_FORMAT ": %s", addr,
2248 page_start, (res ? "success" : strerror(errno)));
2249 tty->print_raw_cr(buf);
2250 }
2251
2252 // Set last_addr so if we fault again at the same address, we don't
2253 // end up in an endless loop.
2254 //
2255 // There are two potential complications here. Two threads trapping
2256 // at the same address at the same time could cause one of the
2257 // threads to think it already unguarded, and abort the VM. Likely
2258 // very rare.
2259 //
2260 // The other race involves two threads alternately trapping at
2261 // different addresses and failing to unguard the page, resulting in
2262 // an endless loop. This condition is probably even more unlikely
2263 // than the first.
2264 //
2265 // Although both cases could be avoided by using locks or thread
2266 // local last_addr, these solutions are unnecessary complication:
2267 // this handler is a best-effort safety net, not a complete solution.
2268 // It is disabled by default and should only be used as a workaround
2269 // in case we missed any no-execute-unsafe VM code.
2270
2271 last_addr = addr;
2272
2273 return EXCEPTION_CONTINUE_EXECUTION;
2274 }
2275 }
2276
2277 // Last unguard failed or not unguarding
2278 tty->print_raw_cr("Execution protection violation");
2279 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord,
2280 exceptionInfo->ContextRecord);
2281 return EXCEPTION_CONTINUE_SEARCH;
2282 }
2283 }
2284 #endif // _WIN64
2285
2286 // Check to see if we caught the safepoint code in the
2287 // process of write protecting the memory serialization page.
2288 // It write enables the page immediately after protecting it
2289 // so just return.
2290 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
2291 JavaThread* thread = (JavaThread*) t;
2292 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2293 address addr = (address) exceptionRecord->ExceptionInformation[1];
2294 if ( os::is_memory_serialize_page(thread, addr) ) {
2295 // Block current thread until the memory serialize page permission restored.
2296 os::block_on_serialize_page_trap();
2297 return EXCEPTION_CONTINUE_EXECUTION;
2298 }
2299 }
2300
2301 if (t != NULL && t->is_Java_thread()) {
2302 JavaThread* thread = (JavaThread*) t;
2303 bool in_java = thread->thread_state() == _thread_in_Java;
2304
2305 // Handle potential stack overflows up front.
2306 if (exception_code == EXCEPTION_STACK_OVERFLOW) {
2307 if (os::uses_stack_guard_pages()) {
2308 #ifdef _M_IA64
2309 //
2310 // If it's a legal stack address continue, Windows will map it in.
2311 //
2312 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2313 address addr = (address) exceptionRecord->ExceptionInformation[1];
2314 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() )
2315 return EXCEPTION_CONTINUE_EXECUTION;
2316
2317 // The register save area is the same size as the memory stack
2318 // and starts at the page just above the start of the memory stack.
2319 // If we get a fault in this area, we've run out of register
2320 // stack. If we are in java, try throwing a stack overflow exception.
2321 if (addr > thread->stack_base() &&
2322 addr <= (thread->stack_base()+thread->stack_size()) ) {
2323 char buf[256];
2324 jio_snprintf(buf, sizeof(buf),
2325 "Register stack overflow, addr:%p, stack_base:%p\n",
2326 addr, thread->stack_base() );
2327 tty->print_raw_cr(buf);
2328 // If not in java code, return and hope for the best.
2329 return in_java ? Handle_Exception(exceptionInfo,
2330 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
2331 : EXCEPTION_CONTINUE_EXECUTION;
2332 }
2333 #endif
2334 if (thread->stack_yellow_zone_enabled()) {
2335 // Yellow zone violation. The o/s has unprotected the first yellow
2336 // zone page for us. Note: must call disable_stack_yellow_zone to
2337 // update the enabled status, even if the zone contains only one page.
2338 thread->disable_stack_yellow_zone();
2339 // If not in java code, return and hope for the best.
2340 return in_java ? Handle_Exception(exceptionInfo,
2341 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
2342 : EXCEPTION_CONTINUE_EXECUTION;
2343 } else {
2344 // Fatal red zone violation.
2345 thread->disable_stack_red_zone();
2346 tty->print_raw_cr("An unrecoverable stack overflow has occurred.");
2347 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2348 exceptionInfo->ContextRecord);
2349 return EXCEPTION_CONTINUE_SEARCH;
2350 }
2351 } else if (in_java) {
2352 // JVM-managed guard pages cannot be used on win95/98. The o/s provides
2353 // a one-time-only guard page, which it has released to us. The next
2354 // stack overflow on this thread will result in an ACCESS_VIOLATION.
2355 return Handle_Exception(exceptionInfo,
2356 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2357 } else {
2358 // Can only return and hope for the best. Further stack growth will
2359 // result in an ACCESS_VIOLATION.
2360 return EXCEPTION_CONTINUE_EXECUTION;
2361 }
2362 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2363 // Either stack overflow or null pointer exception.
2364 if (in_java) {
2365 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2366 address addr = (address) exceptionRecord->ExceptionInformation[1];
2367 address stack_end = thread->stack_base() - thread->stack_size();
2368 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) {
2369 // Stack overflow.
2370 assert(!os::uses_stack_guard_pages(),
2371 "should be caught by red zone code above.");
2372 return Handle_Exception(exceptionInfo,
2373 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2374 }
2375 //
2376 // Check for safepoint polling and implicit null
2377 // We only expect null pointers in the stubs (vtable)
2378 // the rest are checked explicitly now.
2379 //
2380 CodeBlob* cb = CodeCache::find_blob(pc);
2381 if (cb != NULL) {
2382 if (os::is_poll_address(addr)) {
2383 address stub = SharedRuntime::get_poll_stub(pc);
2384 return Handle_Exception(exceptionInfo, stub);
2385 }
2386 }
2387 {
2388 #ifdef _WIN64
2389 //
2390 // If it's a legal stack address map the entire region in
2391 //
2392 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2393 address addr = (address) exceptionRecord->ExceptionInformation[1];
2394 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
2395 addr = (address)((uintptr_t)addr &
2396 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
2397 os::commit_memory((char *)addr, thread->stack_base() - addr,
2398 false );
2399 return EXCEPTION_CONTINUE_EXECUTION;
2400 }
2401 else
2402 #endif
2403 {
2404 // Null pointer exception.
2405 #ifdef _M_IA64
2406 // We catch register stack overflows in compiled code by doing
2407 // an explicit compare and executing a st8(G0, G0) if the
2408 // BSP enters into our guard area. We test for the overflow
2409 // condition and fall into the normal null pointer exception
2410 // code if BSP hasn't overflowed.
2411 if ( in_java ) {
2412 if(thread->register_stack_overflow()) {
2413 assert((address)exceptionInfo->ContextRecord->IntS3 ==
2414 thread->register_stack_limit(),
2415 "GR7 doesn't contain register_stack_limit");
2416 // Disable the yellow zone which sets the state that
2417 // we've got a stack overflow problem.
2418 if (thread->stack_yellow_zone_enabled()) {
2419 thread->disable_stack_yellow_zone();
2420 }
2421 // Give us some room to process the exception
2422 thread->disable_register_stack_guard();
2423 // Update GR7 with the new limit so we can continue running
2424 // compiled code.
2425 exceptionInfo->ContextRecord->IntS3 =
2426 (ULONGLONG)thread->register_stack_limit();
2427 return Handle_Exception(exceptionInfo,
2428 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2429 } else {
2430 //
2431 // Check for implicit null
2432 // We only expect null pointers in the stubs (vtable)
2433 // the rest are checked explicitly now.
2434 //
2435 if (((uintptr_t)addr) < os::vm_page_size() ) {
2436 // an access to the first page of VM--assume it is a null pointer
2437 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
2438 if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
2439 }
2440 }
2441 } // in_java
2442
2443 // IA64 doesn't use implicit null checking yet. So we shouldn't
2444 // get here.
2445 tty->print_raw_cr("Access violation, possible null pointer exception");
2446 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2447 exceptionInfo->ContextRecord);
2448 return EXCEPTION_CONTINUE_SEARCH;
2449 #else /* !IA64 */
2450
2451 // Windows 98 reports faulting addresses incorrectly
2452 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) ||
2453 !os::win32::is_nt()) {
2454 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
2455 if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
2456 }
2457 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2458 exceptionInfo->ContextRecord);
2459 return EXCEPTION_CONTINUE_SEARCH;
2460 #endif
2461 }
2462 }
2463 }
2464
2465 #ifdef _WIN64
2466 // Special care for fast JNI field accessors.
2467 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks
2468 // in and the heap gets shrunk before the field access.
2469 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2470 address addr = JNI_FastGetField::find_slowcase_pc(pc);
2471 if (addr != (address)-1) {
2472 return Handle_Exception(exceptionInfo, addr);
2473 }
2474 }
2475 #endif
2476
2477 #ifdef _WIN64
2478 // Windows will sometimes generate an access violation
2479 // when we call malloc. Since we use VectoredExceptions
2480 // on 64 bit platforms, we see this exception. We must
2481 // pass this exception on so Windows can recover.
2482 // We check to see if the pc of the fault is in NTDLL.DLL
2483 // if so, we pass control on to Windows for handling.
2484 if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH;
2485 #endif
2486
2487 // Stack overflow or null pointer exception in native code.
2488 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2489 exceptionInfo->ContextRecord);
2490 return EXCEPTION_CONTINUE_SEARCH;
2491 }
2492
2493 if (in_java) {
2494 switch (exception_code) {
2495 case EXCEPTION_INT_DIVIDE_BY_ZERO:
2496 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO));
2497
2498 case EXCEPTION_INT_OVERFLOW:
2499 return Handle_IDiv_Exception(exceptionInfo);
2500
2501 } // switch
2502 }
2503 #ifndef _WIN64
2504 if (((thread->thread_state() == _thread_in_Java) ||
2505 (thread->thread_state() == _thread_in_native)) &&
2506 exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION)
2507 {
2508 LONG result=Handle_FLT_Exception(exceptionInfo);
2509 if (result==EXCEPTION_CONTINUE_EXECUTION) return result;
2510 }
2511 #endif //_WIN64
2512 }
2513
2514 if (exception_code != EXCEPTION_BREAKPOINT) {
2515 #ifndef _WIN64
2516 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2517 exceptionInfo->ContextRecord);
2518 #else
2519 // Itanium Windows uses a VectoredExceptionHandler
2520 // Which means that C++ programatic exception handlers (try/except)
2521 // will get here. Continue the search for the right except block if
2522 // the exception code is not a fatal code.
2523 switch ( exception_code ) {
2524 case EXCEPTION_ACCESS_VIOLATION:
2525 case EXCEPTION_STACK_OVERFLOW:
2526 case EXCEPTION_ILLEGAL_INSTRUCTION:
2527 case EXCEPTION_ILLEGAL_INSTRUCTION_2:
2528 case EXCEPTION_INT_OVERFLOW:
2529 case EXCEPTION_INT_DIVIDE_BY_ZERO:
2530 case EXCEPTION_UNCAUGHT_CXX_EXCEPTION:
2531 { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2532 exceptionInfo->ContextRecord);
2533 }
2534 break;
2535 default:
2536 break;
2537 }
2538 #endif
2539 }
2540 return EXCEPTION_CONTINUE_SEARCH;
2541 }
2542
2543 #ifndef _WIN64
2544 // Special care for fast JNI accessors.
2545 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and
2546 // the heap gets shrunk before the field access.
2547 // Need to install our own structured exception handler since native code may
2548 // install its own.
2549 LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
2550 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2551 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2552 address pc = (address) exceptionInfo->ContextRecord->Eip;
2553 address addr = JNI_FastGetField::find_slowcase_pc(pc);
2554 if (addr != (address)-1) {
2555 return Handle_Exception(exceptionInfo, addr);
2556 }
2557 }
2558 return EXCEPTION_CONTINUE_SEARCH;
2559 }
2560
2561 #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \
2562 Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \
2563 __try { \
2564 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \
2565 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \
2566 } \
2567 return 0; \
2568 }
2569
2570 DEFINE_FAST_GETFIELD(jboolean, bool, Boolean)
2571 DEFINE_FAST_GETFIELD(jbyte, byte, Byte)
2572 DEFINE_FAST_GETFIELD(jchar, char, Char)
2573 DEFINE_FAST_GETFIELD(jshort, short, Short)
2574 DEFINE_FAST_GETFIELD(jint, int, Int)
2575 DEFINE_FAST_GETFIELD(jlong, long, Long)
2576 DEFINE_FAST_GETFIELD(jfloat, float, Float)
2577 DEFINE_FAST_GETFIELD(jdouble, double, Double)
2578
2579 address os::win32::fast_jni_accessor_wrapper(BasicType type) {
2580 switch (type) {
2581 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper;
2582 case T_BYTE: return (address)jni_fast_GetByteField_wrapper;
2583 case T_CHAR: return (address)jni_fast_GetCharField_wrapper;
2584 case T_SHORT: return (address)jni_fast_GetShortField_wrapper;
2585 case T_INT: return (address)jni_fast_GetIntField_wrapper;
2586 case T_LONG: return (address)jni_fast_GetLongField_wrapper;
2587 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper;
2588 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper;
2589 default: ShouldNotReachHere();
2590 }
2591 return (address)-1;
2592 }
2593 #endif
2594
2595 // Virtual Memory
2596
2597 int os::vm_page_size() { return os::win32::vm_page_size(); }
2598 int os::vm_allocation_granularity() {
2599 return os::win32::vm_allocation_granularity();
2600 }
2601
2602 // Windows large page support is available on Windows 2003. In order to use
2603 // large page memory, the administrator must first assign additional privilege
2604 // to the user:
2605 // + select Control Panel -> Administrative Tools -> Local Security Policy
2606 // + select Local Policies -> User Rights Assignment
2607 // + double click "Lock pages in memory", add users and/or groups
2608 // + reboot
2609 // Note the above steps are needed for administrator as well, as administrators
2610 // by default do not have the privilege to lock pages in memory.
2611 //
2612 // Note about Windows 2003: although the API supports committing large page
2613 // memory on a page-by-page basis and VirtualAlloc() returns success under this
2614 // scenario, I found through experiment it only uses large page if the entire
2615 // memory region is reserved and committed in a single VirtualAlloc() call.
2616 // This makes Windows large page support more or less like Solaris ISM, in
2617 // that the entire heap must be committed upfront. This probably will change
2618 // in the future, if so the code below needs to be revisited.
2619
2620 #ifndef MEM_LARGE_PAGES
2621 #define MEM_LARGE_PAGES 0x20000000
2622 #endif
2623
2624 static HANDLE _hProcess;
2625 static HANDLE _hToken;
2626
2627 // Container for NUMA node list info
2628 class NUMANodeListHolder {
2629 private:
2630 int *_numa_used_node_list; // allocated below
2631 int _numa_used_node_count;
2632
2633 void free_node_list() {
2634 if (_numa_used_node_list != NULL) {
2635 FREE_C_HEAP_ARRAY(int, _numa_used_node_list);
2636 }
2637 }
2638
2639 public:
2640 NUMANodeListHolder() {
2641 _numa_used_node_count = 0;
2642 _numa_used_node_list = NULL;
2643 // do rest of initialization in build routine (after function pointers are set up)
2644 }
2645
2646 ~NUMANodeListHolder() {
2647 free_node_list();
2648 }
2649
2650 bool build() {
2651 DWORD_PTR proc_aff_mask;
2652 DWORD_PTR sys_aff_mask;
2653 if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false;
2654 ULONG highest_node_number;
2655 if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false;
2656 free_node_list();
2657 _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1);
2658 for (unsigned int i = 0; i <= highest_node_number; i++) {
2659 ULONGLONG proc_mask_numa_node;
2660 if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false;
2661 if ((proc_aff_mask & proc_mask_numa_node)!=0) {
2662 _numa_used_node_list[_numa_used_node_count++] = i;
2663 }
2664 }
2665 return (_numa_used_node_count > 1);
2666 }
2667
2668 int get_count() {return _numa_used_node_count;}
2669 int get_node_list_entry(int n) {
2670 // for indexes out of range, returns -1
2671 return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1);
2672 }
2673
2674 } numa_node_list_holder;
2675
2676
2677
2678 static size_t _large_page_size = 0;
2679
2680 static bool resolve_functions_for_large_page_init() {
2681 return os::Kernel32Dll::GetLargePageMinimumAvailable() &&
2682 os::Advapi32Dll::AdvapiAvailable();
2683 }
2684
2685 static bool request_lock_memory_privilege() {
2686 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE,
2687 os::current_process_id());
2688
2689 LUID luid;
2690 if (_hProcess != NULL &&
2691 os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) &&
2692 os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) {
2693
2694 TOKEN_PRIVILEGES tp;
2695 tp.PrivilegeCount = 1;
2696 tp.Privileges[0].Luid = luid;
2697 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
2698
2699 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the
2700 // privilege. Check GetLastError() too. See MSDN document.
2701 if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) &&
2702 (GetLastError() == ERROR_SUCCESS)) {
2703 return true;
2704 }
2705 }
2706
2707 return false;
2708 }
2709
2710 static void cleanup_after_large_page_init() {
2711 if (_hProcess) CloseHandle(_hProcess);
2712 _hProcess = NULL;
2713 if (_hToken) CloseHandle(_hToken);
2714 _hToken = NULL;
2715 }
2716
2717 static bool numa_interleaving_init() {
2718 bool success = false;
2719 bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving);
2720
2721 // print a warning if UseNUMAInterleaving flag is specified on command line
2722 bool warn_on_failure = use_numa_interleaving_specified;
2723 # define WARN(msg) if (warn_on_failure) { warning(msg); }
2724
2725 // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages)
2726 size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
2727 NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity);
2728
2729 if (os::Kernel32Dll::NumaCallsAvailable()) {
2730 if (numa_node_list_holder.build()) {
2731 if (PrintMiscellaneous && Verbose) {
2732 tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count());
2733 for (int i = 0; i < numa_node_list_holder.get_count(); i++) {
2734 tty->print("%d ", numa_node_list_holder.get_node_list_entry(i));
2735 }
2736 tty->print("\n");
2737 }
2738 success = true;
2739 } else {
2740 WARN("Process does not cover multiple NUMA nodes.");
2741 }
2742 } else {
2743 WARN("NUMA Interleaving is not supported by the operating system.");
2744 }
2745 if (!success) {
2746 if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag.");
2747 }
2748 return success;
2749 #undef WARN
2750 }
2751
2752 // this routine is used whenever we need to reserve a contiguous VA range
2753 // but we need to make separate VirtualAlloc calls for each piece of the range
2754 // Reasons for doing this:
2755 // * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise)
2756 // * UseNUMAInterleaving requires a separate node for each piece
2757 static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot,
2758 bool should_inject_error=false) {
2759 char * p_buf;
2760 // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size
2761 size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
2762 size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size;
2763
2764 // first reserve enough address space in advance since we want to be
2765 // able to break a single contiguous virtual address range into multiple
2766 // large page commits but WS2003 does not allow reserving large page space
2767 // so we just use 4K pages for reserve, this gives us a legal contiguous
2768 // address space. then we will deallocate that reservation, and re alloc
2769 // using large pages
2770 const size_t size_of_reserve = bytes + chunk_size;
2771 if (bytes > size_of_reserve) {
2772 // Overflowed.
2773 return NULL;
2774 }
2775 p_buf = (char *) VirtualAlloc(addr,
2776 size_of_reserve, // size of Reserve
2777 MEM_RESERVE,
2778 PAGE_READWRITE);
2779 // If reservation failed, return NULL
2780 if (p_buf == NULL) return NULL;
2781
2782 os::release_memory(p_buf, bytes + chunk_size);
2783
2784 // we still need to round up to a page boundary (in case we are using large pages)
2785 // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size)
2786 // instead we handle this in the bytes_to_rq computation below
2787 p_buf = (char *) align_size_up((size_t)p_buf, page_size);
2788
2789 // now go through and allocate one chunk at a time until all bytes are
2790 // allocated
2791 size_t bytes_remaining = bytes;
2792 // An overflow of align_size_up() would have been caught above
2793 // in the calculation of size_of_reserve.
2794 char * next_alloc_addr = p_buf;
2795 HANDLE hProc = GetCurrentProcess();
2796
2797 #ifdef ASSERT
2798 // Variable for the failure injection
2799 long ran_num = os::random();
2800 size_t fail_after = ran_num % bytes;
2801 #endif
2802
2803 int count=0;
2804 while (bytes_remaining) {
2805 // select bytes_to_rq to get to the next chunk_size boundary
2806
2807 size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size));
2808 // Note allocate and commit
2809 char * p_new;
2810
2811 #ifdef ASSERT
2812 bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after);
2813 #else
2814 const bool inject_error_now = false;
2815 #endif
2816
2817 if (inject_error_now) {
2818 p_new = NULL;
2819 } else {
2820 if (!UseNUMAInterleaving) {
2821 p_new = (char *) VirtualAlloc(next_alloc_addr,
2822 bytes_to_rq,
2823 flags,
2824 prot);
2825 } else {
2826 // get the next node to use from the used_node_list
2827 assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected");
2828 DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count());
2829 p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc,
2830 next_alloc_addr,
2831 bytes_to_rq,
2832 flags,
2833 prot,
2834 node);
2835 }
2836 }
2837
2838 if (p_new == NULL) {
2839 // Free any allocated pages
2840 if (next_alloc_addr > p_buf) {
2841 // Some memory was committed so release it.
2842 size_t bytes_to_release = bytes - bytes_remaining;
2843 os::release_memory(p_buf, bytes_to_release);
2844 }
2845 #ifdef ASSERT
2846 if (should_inject_error) {
2847 if (TracePageSizes && Verbose) {
2848 tty->print_cr("Reserving pages individually failed.");
2849 }
2850 }
2851 #endif
2852 return NULL;
2853 }
2854 bytes_remaining -= bytes_to_rq;
2855 next_alloc_addr += bytes_to_rq;
2856 count++;
2857 }
2858 // made it this far, success
2859 return p_buf;
2860 }
2861
2862
2863
2864 void os::large_page_init() {
2865 if (!UseLargePages) return;
2866
2867 // print a warning if any large page related flag is specified on command line
2868 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
2869 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
2870 bool success = false;
2871
2872 # define WARN(msg) if (warn_on_failure) { warning(msg); }
2873 if (resolve_functions_for_large_page_init()) {
2874 if (request_lock_memory_privilege()) {
2875 size_t s = os::Kernel32Dll::GetLargePageMinimum();
2876 if (s) {
2877 #if defined(IA32) || defined(AMD64)
2878 if (s > 4*M || LargePageSizeInBytes > 4*M) {
2879 WARN("JVM cannot use large pages bigger than 4mb.");
2880 } else {
2881 #endif
2882 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) {
2883 _large_page_size = LargePageSizeInBytes;
2884 } else {
2885 _large_page_size = s;
2886 }
2887 success = true;
2888 #if defined(IA32) || defined(AMD64)
2889 }
2890 #endif
2891 } else {
2892 WARN("Large page is not supported by the processor.");
2893 }
2894 } else {
2895 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.");
2896 }
2897 } else {
2898 WARN("Large page is not supported by the operating system.");
2899 }
2900 #undef WARN
2901
2902 const size_t default_page_size = (size_t) vm_page_size();
2903 if (success && _large_page_size > default_page_size) {
2904 _page_sizes[0] = _large_page_size;
2905 _page_sizes[1] = default_page_size;
2906 _page_sizes[2] = 0;
2907 }
2908
2909 cleanup_after_large_page_init();
2910 UseLargePages = success;
2911 }
2912
2913 // On win32, one cannot release just a part of reserved memory, it's an
2914 // all or nothing deal. When we split a reservation, we must break the
2915 // reservation into two reservations.
2916 void os::split_reserved_memory(char *base, size_t size, size_t split,
2917 bool realloc) {
2918 if (size > 0) {
2919 release_memory(base, size);
2920 if (realloc) {
2921 reserve_memory(split, base);
2922 }
2923 if (size != split) {
2924 reserve_memory(size - split, base + split);
2925 }
2926 }
2927 }
2928
2929 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) {
2930 assert((size_t)addr % os::vm_allocation_granularity() == 0,
2931 "reserve alignment");
2932 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
2933 char* res;
2934 // note that if UseLargePages is on, all the areas that require interleaving
2935 // will go thru reserve_memory_special rather than thru here.
2936 bool use_individual = (UseNUMAInterleaving && !UseLargePages);
2937 if (!use_individual) {
2938 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
2939 } else {
2940 elapsedTimer reserveTimer;
2941 if( Verbose && PrintMiscellaneous ) reserveTimer.start();
2942 // in numa interleaving, we have to allocate pages individually
2943 // (well really chunks of NUMAInterleaveGranularity size)
2944 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE);
2945 if (res == NULL) {
2946 warning("NUMA page allocation failed");
2947 }
2948 if( Verbose && PrintMiscellaneous ) {
2949 reserveTimer.stop();
2950 tty->print_cr("reserve_memory of %Ix bytes took %ld ms (%ld ticks)", bytes,
2951 reserveTimer.milliseconds(), reserveTimer.ticks());
2952 }
2953 }
2954 assert(res == NULL || addr == NULL || addr == res,
2955 "Unexpected address from reserve.");
2956
2957 return res;
2958 }
2959
2960 // Reserve memory at an arbitrary address, only if that area is
2961 // available (and not reserved for something else).
2962 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2963 // Windows os::reserve_memory() fails of the requested address range is
2964 // not avilable.
2965 return reserve_memory(bytes, requested_addr);
2966 }
2967
2968 size_t os::large_page_size() {
2969 return _large_page_size;
2970 }
2971
2972 bool os::can_commit_large_page_memory() {
2973 // Windows only uses large page memory when the entire region is reserved
2974 // and committed in a single VirtualAlloc() call. This may change in the
2975 // future, but with Windows 2003 it's not possible to commit on demand.
2976 return false;
2977 }
2978
2979 bool os::can_execute_large_page_memory() {
2980 return true;
2981 }
2982
2983 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
2984
2985 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
2986 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
2987
2988 // with large pages, there are two cases where we need to use Individual Allocation
2989 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003)
2990 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page
2991 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) {
2992 if (TracePageSizes && Verbose) {
2993 tty->print_cr("Reserving large pages individually.");
2994 }
2995 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError);
2996 if (p_buf == NULL) {
2997 // give an appropriate warning message
2998 if (UseNUMAInterleaving) {
2999 warning("NUMA large page allocation failed, UseLargePages flag ignored");
3000 }
3001 if (UseLargePagesIndividualAllocation) {
3002 warning("Individually allocated large pages failed, "
3003 "use -XX:-UseLargePagesIndividualAllocation to turn off");
3004 }
3005 return NULL;
3006 }
3007
3008 return p_buf;
3009
3010 } else {
3011 // normal policy just allocate it all at once
3012 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
3013 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot);
3014 return res;
3015 }
3016 }
3017
3018 bool os::release_memory_special(char* base, size_t bytes) {
3019 return release_memory(base, bytes);
3020 }
3021
3022 void os::print_statistics() {
3023 }
3024
3025 bool os::commit_memory(char* addr, size_t bytes, bool exec) {
3026 if (bytes == 0) {
3027 // Don't bother the OS with noops.
3028 return true;
3029 }
3030 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries");
3031 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
3032 // Don't attempt to print anything if the OS call fails. We're
3033 // probably low on resources, so the print itself may cause crashes.
3034
3035 // unless we have NUMAInterleaving enabled, the range of a commit
3036 // is always within a reserve covered by a single VirtualAlloc
3037 // in that case we can just do a single commit for the requested size
3038 if (!UseNUMAInterleaving) {
3039 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false;
3040 if (exec) {
3041 DWORD oldprot;
3042 // Windows doc says to use VirtualProtect to get execute permissions
3043 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false;
3044 }
3045 return true;
3046 } else {
3047
3048 // when NUMAInterleaving is enabled, the commit might cover a range that
3049 // came from multiple VirtualAlloc reserves (using allocate_pages_individually).
3050 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery
3051 // returns represents the number of bytes that can be committed in one step.
3052 size_t bytes_remaining = bytes;
3053 char * next_alloc_addr = addr;
3054 while (bytes_remaining > 0) {
3055 MEMORY_BASIC_INFORMATION alloc_info;
3056 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info));
3057 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize);
3058 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL)
3059 return false;
3060 if (exec) {
3061 DWORD oldprot;
3062 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot))
3063 return false;
3064 }
3065 bytes_remaining -= bytes_to_rq;
3066 next_alloc_addr += bytes_to_rq;
3067 }
3068 }
3069 // if we made it this far, return true
3070 return true;
3071 }
3072
3073 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
3074 bool exec) {
3075 return commit_memory(addr, size, exec);
3076 }
3077
3078 bool os::uncommit_memory(char* addr, size_t bytes) {
3079 if (bytes == 0) {
3080 // Don't bother the OS with noops.
3081 return true;
3082 }
3083 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries");
3084 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks");
3085 return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0;
3086 }
3087
3088 bool os::release_memory(char* addr, size_t bytes) {
3089 return VirtualFree(addr, 0, MEM_RELEASE) != 0;
3090 }
3091
3092 bool os::create_stack_guard_pages(char* addr, size_t size) {
3093 return os::commit_memory(addr, size);
3094 }
3095
3096 bool os::remove_stack_guard_pages(char* addr, size_t size) {
3097 return os::uncommit_memory(addr, size);
3098 }
3099
3100 // Set protections specified
3101 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3102 bool is_committed) {
3103 unsigned int p = 0;
3104 switch (prot) {
3105 case MEM_PROT_NONE: p = PAGE_NOACCESS; break;
3106 case MEM_PROT_READ: p = PAGE_READONLY; break;
3107 case MEM_PROT_RW: p = PAGE_READWRITE; break;
3108 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break;
3109 default:
3110 ShouldNotReachHere();
3111 }
3112
3113 DWORD old_status;
3114
3115 // Strange enough, but on Win32 one can change protection only for committed
3116 // memory, not a big deal anyway, as bytes less or equal than 64K
3117 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) {
3118 fatal("cannot commit protection page");
3119 }
3120 // One cannot use os::guard_memory() here, as on Win32 guard page
3121 // have different (one-shot) semantics, from MSDN on PAGE_GUARD:
3122 //
3123 // Pages in the region become guard pages. Any attempt to access a guard page
3124 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off
3125 // the guard page status. Guard pages thus act as a one-time access alarm.
3126 return VirtualProtect(addr, bytes, p, &old_status) != 0;
3127 }
3128
3129 bool os::guard_memory(char* addr, size_t bytes) {
3130 DWORD old_status;
3131 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0;
3132 }
3133
3134 bool os::unguard_memory(char* addr, size_t bytes) {
3135 DWORD old_status;
3136 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0;
3137 }
3138
3139 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
3140 void os::free_memory(char *addr, size_t bytes, size_t alignment_hint) { }
3141 void os::numa_make_global(char *addr, size_t bytes) { }
3142 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { }
3143 bool os::numa_topology_changed() { return false; }
3144 size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); }
3145 int os::numa_get_group_id() { return 0; }
3146 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
3147 if (numa_node_list_holder.get_count() == 0 && size > 0) {
3148 // Provide an answer for UMA systems
3149 ids[0] = 0;
3150 return 1;
3151 } else {
3152 // check for size bigger than actual groups_num
3153 size = MIN2(size, numa_get_groups_num());
3154 for (int i = 0; i < (int)size; i++) {
3155 ids[i] = numa_node_list_holder.get_node_list_entry(i);
3156 }
3157 return size;
3158 }
3159 }
3160
3161 bool os::get_page_info(char *start, page_info* info) {
3162 return false;
3163 }
3164
3165 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
3166 return end;
3167 }
3168
3169 char* os::non_memory_address_word() {
3170 // Must never look like an address returned by reserve_memory,
3171 // even in its subfields (as defined by the CPU immediate fields,
3172 // if the CPU splits constants across multiple instructions).
3173 return (char*)-1;
3174 }
3175
3176 #define MAX_ERROR_COUNT 100
3177 #define SYS_THREAD_ERROR 0xffffffffUL
3178
3179 void os::pd_start_thread(Thread* thread) {
3180 DWORD ret = ResumeThread(thread->osthread()->thread_handle());
3181 // Returns previous suspend state:
3182 // 0: Thread was not suspended
3183 // 1: Thread is running now
3184 // >1: Thread is still suspended.
3185 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back
3186 }
3187
3188 class HighResolutionInterval {
3189 // The default timer resolution seems to be 10 milliseconds.
3190 // (Where is this written down?)
3191 // If someone wants to sleep for only a fraction of the default,
3192 // then we set the timer resolution down to 1 millisecond for
3193 // the duration of their interval.
3194 // We carefully set the resolution back, since otherwise we
3195 // seem to incur an overhead (3%?) that we don't need.
3196 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time.
3197 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod().
3198 // Alternatively, we could compute the relative error (503/500 = .6%) and only use
3199 // timeBeginPeriod() if the relative error exceeded some threshold.
3200 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and
3201 // to decreased efficiency related to increased timer "tick" rates. We want to minimize
3202 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high
3203 // resolution timers running.
3204 private:
3205 jlong resolution;
3206 public:
3207 HighResolutionInterval(jlong ms) {
3208 resolution = ms % 10L;
3209 if (resolution != 0) {
3210 MMRESULT result = timeBeginPeriod(1L);
3211 }
3212 }
3213 ~HighResolutionInterval() {
3214 if (resolution != 0) {
3215 MMRESULT result = timeEndPeriod(1L);
3216 }
3217 resolution = 0L;
3218 }
3219 };
3220
3221 int os::sleep(Thread* thread, jlong ms, bool interruptable) {
3222 jlong limit = (jlong) MAXDWORD;
3223
3224 while(ms > limit) {
3225 int res;
3226 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT)
3227 return res;
3228 ms -= limit;
3229 }
3230
3231 assert(thread == Thread::current(), "thread consistency check");
3232 OSThread* osthread = thread->osthread();
3233 OSThreadWaitState osts(osthread, false /* not Object.wait() */);
3234 int result;
3235 if (interruptable) {
3236 assert(thread->is_Java_thread(), "must be java thread");
3237 JavaThread *jt = (JavaThread *) thread;
3238 ThreadBlockInVM tbivm(jt);
3239
3240 jt->set_suspend_equivalent();
3241 // cleared by handle_special_suspend_equivalent_condition() or
3242 // java_suspend_self() via check_and_wait_while_suspended()
3243
3244 HANDLE events[1];
3245 events[0] = osthread->interrupt_event();
3246 HighResolutionInterval *phri=NULL;
3247 if(!ForceTimeHighResolution)
3248 phri = new HighResolutionInterval( ms );
3249 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) {
3250 result = OS_TIMEOUT;
3251 } else {
3252 ResetEvent(osthread->interrupt_event());
3253 osthread->set_interrupted(false);
3254 result = OS_INTRPT;
3255 }
3256 delete phri; //if it is NULL, harmless
3257
3258 // were we externally suspended while we were waiting?
3259 jt->check_and_wait_while_suspended();
3260 } else {
3261 assert(!thread->is_Java_thread(), "must not be java thread");
3262 Sleep((long) ms);
3263 result = OS_TIMEOUT;
3264 }
3265 return result;
3266 }
3267
3268 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3269 void os::infinite_sleep() {
3270 while (true) { // sleep forever ...
3271 Sleep(100000); // ... 100 seconds at a time
3272 }
3273 }
3274
3275 typedef BOOL (WINAPI * STTSignature)(void) ;
3276
3277 os::YieldResult os::NakedYield() {
3278 // Use either SwitchToThread() or Sleep(0)
3279 // Consider passing back the return value from SwitchToThread().
3280 if (os::Kernel32Dll::SwitchToThreadAvailable()) {
3281 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ;
3282 } else {
3283 Sleep(0);
3284 }
3285 return os::YIELD_UNKNOWN ;
3286 }
3287
3288 void os::yield() { os::NakedYield(); }
3289
3290 void os::yield_all(int attempts) {
3291 // Yields to all threads, including threads with lower priorities
3292 Sleep(1);
3293 }
3294
3295 // Win32 only gives you access to seven real priorities at a time,
3296 // so we compress Java's ten down to seven. It would be better
3297 // if we dynamically adjusted relative priorities.
3298
3299 int os::java_to_os_priority[CriticalPriority + 1] = {
3300 THREAD_PRIORITY_IDLE, // 0 Entry should never be used
3301 THREAD_PRIORITY_LOWEST, // 1 MinPriority
3302 THREAD_PRIORITY_LOWEST, // 2
3303 THREAD_PRIORITY_BELOW_NORMAL, // 3
3304 THREAD_PRIORITY_BELOW_NORMAL, // 4
3305 THREAD_PRIORITY_NORMAL, // 5 NormPriority
3306 THREAD_PRIORITY_NORMAL, // 6
3307 THREAD_PRIORITY_ABOVE_NORMAL, // 7
3308 THREAD_PRIORITY_ABOVE_NORMAL, // 8
3309 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
3310 THREAD_PRIORITY_HIGHEST // 10 MaxPriority
3311 THREAD_PRIORITY_HIGHEST // 11 CriticalPriority
3312 };
3313
3314 int prio_policy1[CriticalPriority + 1] = {
3315 THREAD_PRIORITY_IDLE, // 0 Entry should never be used
3316 THREAD_PRIORITY_LOWEST, // 1 MinPriority
3317 THREAD_PRIORITY_LOWEST, // 2
3318 THREAD_PRIORITY_BELOW_NORMAL, // 3
3319 THREAD_PRIORITY_BELOW_NORMAL, // 4
3320 THREAD_PRIORITY_NORMAL, // 5 NormPriority
3321 THREAD_PRIORITY_ABOVE_NORMAL, // 6
3322 THREAD_PRIORITY_ABOVE_NORMAL, // 7
3323 THREAD_PRIORITY_HIGHEST, // 8
3324 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
3325 THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority
3326 THREAD_PRIORITY_TIME_CRITICAL // 11 CriticalPriority
3327 };
3328
3329 static int prio_init() {
3330 // If ThreadPriorityPolicy is 1, switch tables
3331 if (ThreadPriorityPolicy == 1) {
3332 int i;
3333 for (i = 0; i < MaxPriority + 1; i++) {
3334 os::java_to_os_priority[i] = prio_policy1[i];
3335 }
3336 }
3337 return 0;
3338 }
3339
3340 OSReturn os::set_native_priority(Thread* thread, int priority) {
3341 if (!UseThreadPriorities) return OS_OK;
3342 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0;
3343 return ret ? OS_OK : OS_ERR;
3344 }
3345
3346 OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) {
3347 if ( !UseThreadPriorities ) {
3348 *priority_ptr = java_to_os_priority[NormPriority];
3349 return OS_OK;
3350 }
3351 int os_prio = GetThreadPriority(thread->osthread()->thread_handle());
3352 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) {
3353 assert(false, "GetThreadPriority failed");
3354 return OS_ERR;
3355 }
3356 *priority_ptr = os_prio;
3357 return OS_OK;
3358 }
3359
3360
3361 // Hint to the underlying OS that a task switch would not be good.
3362 // Void return because it's a hint and can fail.
3363 void os::hint_no_preempt() {}
3364
3365 void os::interrupt(Thread* thread) {
3366 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
3367 "possibility of dangling Thread pointer");
3368
3369 OSThread* osthread = thread->osthread();
3370 osthread->set_interrupted(true);
3371 // More than one thread can get here with the same value of osthread,
3372 // resulting in multiple notifications. We do, however, want the store
3373 // to interrupted() to be visible to other threads before we post
3374 // the interrupt event.
3375 OrderAccess::release();
3376 SetEvent(osthread->interrupt_event());
3377 // For JSR166: unpark after setting status
3378 if (thread->is_Java_thread())
3379 ((JavaThread*)thread)->parker()->unpark();
3380
3381 ParkEvent * ev = thread->_ParkEvent ;
3382 if (ev != NULL) ev->unpark() ;
3383
3384 }
3385
3386
3387 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
3388 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
3389 "possibility of dangling Thread pointer");
3390
3391 OSThread* osthread = thread->osthread();
3392 bool interrupted = osthread->interrupted();
3393 // There is no synchronization between the setting of the interrupt
3394 // and it being cleared here. It is critical - see 6535709 - that
3395 // we only clear the interrupt state, and reset the interrupt event,
3396 // if we are going to report that we were indeed interrupted - else
3397 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups
3398 // depending on the timing
3399 if (interrupted && clear_interrupted) {
3400 osthread->set_interrupted(false);
3401 ResetEvent(osthread->interrupt_event());
3402 } // Otherwise leave the interrupted state alone
3403
3404 return interrupted;
3405 }
3406
3407 // Get's a pc (hint) for a running thread. Currently used only for profiling.
3408 ExtendedPC os::get_thread_pc(Thread* thread) {
3409 CONTEXT context;
3410 context.ContextFlags = CONTEXT_CONTROL;
3411 HANDLE handle = thread->osthread()->thread_handle();
3412 #ifdef _M_IA64
3413 assert(0, "Fix get_thread_pc");
3414 return ExtendedPC(NULL);
3415 #else
3416 if (GetThreadContext(handle, &context)) {
3417 #ifdef _M_AMD64
3418 return ExtendedPC((address) context.Rip);
3419 #else
3420 return ExtendedPC((address) context.Eip);
3421 #endif
3422 } else {
3423 return ExtendedPC(NULL);
3424 }
3425 #endif
3426 }
3427
3428 // GetCurrentThreadId() returns DWORD
3429 intx os::current_thread_id() { return GetCurrentThreadId(); }
3430
3431 static int _initial_pid = 0;
3432
3433 int os::current_process_id()
3434 {
3435 return (_initial_pid ? _initial_pid : _getpid());
3436 }
3437
3438 int os::win32::_vm_page_size = 0;
3439 int os::win32::_vm_allocation_granularity = 0;
3440 int os::win32::_processor_type = 0;
3441 // Processor level is not available on non-NT systems, use vm_version instead
3442 int os::win32::_processor_level = 0;
3443 julong os::win32::_physical_memory = 0;
3444 size_t os::win32::_default_stack_size = 0;
3445
3446 intx os::win32::_os_thread_limit = 0;
3447 volatile intx os::win32::_os_thread_count = 0;
3448
3449 bool os::win32::_is_nt = false;
3450 bool os::win32::_is_windows_2003 = false;
3451 bool os::win32::_is_windows_server = false;
3452
3453 void os::win32::initialize_system_info() {
3454 SYSTEM_INFO si;
3455 GetSystemInfo(&si);
3456 _vm_page_size = si.dwPageSize;
3457 _vm_allocation_granularity = si.dwAllocationGranularity;
3458 _processor_type = si.dwProcessorType;
3459 _processor_level = si.wProcessorLevel;
3460 set_processor_count(si.dwNumberOfProcessors);
3461
3462 MEMORYSTATUSEX ms;
3463 ms.dwLength = sizeof(ms);
3464
3465 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual,
3466 // dwMemoryLoad (% of memory in use)
3467 GlobalMemoryStatusEx(&ms);
3468 _physical_memory = ms.ullTotalPhys;
3469
3470 OSVERSIONINFOEX oi;
3471 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
3472 GetVersionEx((OSVERSIONINFO*)&oi);
3473 switch(oi.dwPlatformId) {
3474 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break;
3475 case VER_PLATFORM_WIN32_NT:
3476 _is_nt = true;
3477 {
3478 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion;
3479 if (os_vers == 5002) {
3480 _is_windows_2003 = true;
3481 }
3482 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER ||
3483 oi.wProductType == VER_NT_SERVER) {
3484 _is_windows_server = true;
3485 }
3486 }
3487 break;
3488 default: fatal("Unknown platform");
3489 }
3490
3491 _default_stack_size = os::current_stack_size();
3492 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size");
3493 assert((_default_stack_size & (_vm_page_size - 1)) == 0,
3494 "stack size not a multiple of page size");
3495
3496 initialize_performance_counter();
3497
3498 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is
3499 // known to deadlock the system, if the VM issues to thread operations with
3500 // a too high frequency, e.g., such as changing the priorities.
3501 // The 6000 seems to work well - no deadlocks has been notices on the test
3502 // programs that we have seen experience this problem.
3503 if (!os::win32::is_nt()) {
3504 StarvationMonitorInterval = 6000;
3505 }
3506 }
3507
3508
3509 HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) {
3510 char path[MAX_PATH];
3511 DWORD size;
3512 DWORD pathLen = (DWORD)sizeof(path);
3513 HINSTANCE result = NULL;
3514
3515 // only allow library name without path component
3516 assert(strchr(name, '\\') == NULL, "path not allowed");
3517 assert(strchr(name, ':') == NULL, "path not allowed");
3518 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) {
3519 jio_snprintf(ebuf, ebuflen,
3520 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name);
3521 return NULL;
3522 }
3523
3524 // search system directory
3525 if ((size = GetSystemDirectory(path, pathLen)) > 0) {
3526 strcat(path, "\\");
3527 strcat(path, name);
3528 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
3529 return result;
3530 }
3531 }
3532
3533 // try Windows directory
3534 if ((size = GetWindowsDirectory(path, pathLen)) > 0) {
3535 strcat(path, "\\");
3536 strcat(path, name);
3537 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
3538 return result;
3539 }
3540 }
3541
3542 jio_snprintf(ebuf, ebuflen,
3543 "os::win32::load_windows_dll() cannot load %s from system directories.", name);
3544 return NULL;
3545 }
3546
3547 void os::win32::setmode_streams() {
3548 _setmode(_fileno(stdin), _O_BINARY);
3549 _setmode(_fileno(stdout), _O_BINARY);
3550 _setmode(_fileno(stderr), _O_BINARY);
3551 }
3552
3553
3554 bool os::is_debugger_attached() {
3555 return IsDebuggerPresent() ? true : false;
3556 }
3557
3558
3559 void os::wait_for_keypress_at_exit(void) {
3560 if (PauseAtExit) {
3561 fprintf(stderr, "Press any key to continue...\n");
3562 fgetc(stdin);
3563 }
3564 }
3565
3566
3567 int os::message_box(const char* title, const char* message) {
3568 int result = MessageBox(NULL, message, title,
3569 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY);
3570 return result == IDYES;
3571 }
3572
3573 int os::allocate_thread_local_storage() {
3574 return TlsAlloc();
3575 }
3576
3577
3578 void os::free_thread_local_storage(int index) {
3579 TlsFree(index);
3580 }
3581
3582
3583 void os::thread_local_storage_at_put(int index, void* value) {
3584 TlsSetValue(index, value);
3585 assert(thread_local_storage_at(index) == value, "Just checking");
3586 }
3587
3588
3589 void* os::thread_local_storage_at(int index) {
3590 return TlsGetValue(index);
3591 }
3592
3593
3594 #ifndef PRODUCT
3595 #ifndef _WIN64
3596 // Helpers to check whether NX protection is enabled
3597 int nx_exception_filter(_EXCEPTION_POINTERS *pex) {
3598 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
3599 pex->ExceptionRecord->NumberParameters > 0 &&
3600 pex->ExceptionRecord->ExceptionInformation[0] ==
3601 EXCEPTION_INFO_EXEC_VIOLATION) {
3602 return EXCEPTION_EXECUTE_HANDLER;
3603 }
3604 return EXCEPTION_CONTINUE_SEARCH;
3605 }
3606
3607 void nx_check_protection() {
3608 // If NX is enabled we'll get an exception calling into code on the stack
3609 char code[] = { (char)0xC3 }; // ret
3610 void *code_ptr = (void *)code;
3611 __try {
3612 __asm call code_ptr
3613 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) {
3614 tty->print_raw_cr("NX protection detected.");
3615 }
3616 }
3617 #endif // _WIN64
3618 #endif // PRODUCT
3619
3620 // this is called _before_ the global arguments have been parsed
3621 void os::init(void) {
3622 _initial_pid = _getpid();
3623
3624 init_random(1234567);
3625
3626 win32::initialize_system_info();
3627 win32::setmode_streams();
3628 init_page_sizes((size_t) win32::vm_page_size());
3629
3630 // For better scalability on MP systems (must be called after initialize_system_info)
3631 #ifndef PRODUCT
3632 if (is_MP()) {
3633 NoYieldsInMicrolock = true;
3634 }
3635 #endif
3636 // This may be overridden later when argument processing is done.
3637 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation,
3638 os::win32::is_windows_2003());
3639
3640 // Initialize main_process and main_thread
3641 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle
3642 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process,
3643 &main_thread, THREAD_ALL_ACCESS, false, 0)) {
3644 fatal("DuplicateHandle failed\n");
3645 }
3646 main_thread_id = (int) GetCurrentThreadId();
3647 }
3648
3649 // To install functions for atexit processing
3650 extern "C" {
3651 static void perfMemory_exit_helper() {
3652 perfMemory_exit();
3653 }
3654 }
3655
3656 // this is called _after_ the global arguments have been parsed
3657 jint os::init_2(void) {
3658 // Allocate a single page and mark it as readable for safepoint polling
3659 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY);
3660 guarantee( polling_page != NULL, "Reserve Failed for polling page");
3661
3662 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY);
3663 guarantee( return_page != NULL, "Commit Failed for polling page");
3664
3665 os::set_polling_page( polling_page );
3666
3667 #ifndef PRODUCT
3668 if( Verbose && PrintMiscellaneous )
3669 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
3670 #endif
3671
3672 if (!UseMembar) {
3673 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
3674 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
3675
3676 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
3677 guarantee( return_page != NULL, "Commit Failed for memory serialize page");
3678
3679 os::set_memory_serialize_page( mem_serialize_page );
3680
3681 #ifndef PRODUCT
3682 if(Verbose && PrintMiscellaneous)
3683 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
3684 #endif
3685 }
3686
3687 os::large_page_init();
3688
3689 // Setup Windows Exceptions
3690
3691 // On Itanium systems, Structured Exception Handling does not
3692 // work since stack frames must be walkable by the OS. Since
3693 // much of our code is dynamically generated, and we do not have
3694 // proper unwind .xdata sections, the system simply exits
3695 // rather than delivering the exception. To work around
3696 // this we use VectorExceptions instead.
3697 #ifdef _WIN64
3698 if (UseVectoredExceptions) {
3699 topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter);
3700 }
3701 #endif
3702
3703 // for debugging float code generation bugs
3704 if (ForceFloatExceptions) {
3705 #ifndef _WIN64
3706 static long fp_control_word = 0;
3707 __asm { fstcw fp_control_word }
3708 // see Intel PPro Manual, Vol. 2, p 7-16
3709 const long precision = 0x20;
3710 const long underflow = 0x10;
3711 const long overflow = 0x08;
3712 const long zero_div = 0x04;
3713 const long denorm = 0x02;
3714 const long invalid = 0x01;
3715 fp_control_word |= invalid;
3716 __asm { fldcw fp_control_word }
3717 #endif
3718 }
3719
3720 // If stack_commit_size is 0, windows will reserve the default size,
3721 // but only commit a small portion of it.
3722 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size());
3723 size_t default_reserve_size = os::win32::default_stack_size();
3724 size_t actual_reserve_size = stack_commit_size;
3725 if (stack_commit_size < default_reserve_size) {
3726 // If stack_commit_size == 0, we want this too
3727 actual_reserve_size = default_reserve_size;
3728 }
3729
3730 // Check minimum allowable stack size for thread creation and to initialize
3731 // the java system classes, including StackOverflowError - depends on page
3732 // size. Add a page for compiler2 recursion in main thread.
3733 // Add in 2*BytesPerWord times page size to account for VM stack during
3734 // class initialization depending on 32 or 64 bit VM.
3735 size_t min_stack_allowed =
3736 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
3737 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size();
3738 if (actual_reserve_size < min_stack_allowed) {
3739 tty->print_cr("\nThe stack size specified is too small, "
3740 "Specify at least %dk",
3741 min_stack_allowed / K);
3742 return JNI_ERR;
3743 }
3744
3745 JavaThread::set_stack_size_at_create(stack_commit_size);
3746
3747 // Calculate theoretical max. size of Threads to guard gainst artifical
3748 // out-of-memory situations, where all available address-space has been
3749 // reserved by thread stacks.
3750 assert(actual_reserve_size != 0, "Must have a stack");
3751
3752 // Calculate the thread limit when we should start doing Virtual Memory
3753 // banging. Currently when the threads will have used all but 200Mb of space.
3754 //
3755 // TODO: consider performing a similar calculation for commit size instead
3756 // as reserve size, since on a 64-bit platform we'll run into that more
3757 // often than running out of virtual memory space. We can use the
3758 // lower value of the two calculations as the os_thread_limit.
3759 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K);
3760 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size);
3761
3762 // at exit methods are called in the reverse order of their registration.
3763 // there is no limit to the number of functions registered. atexit does
3764 // not set errno.
3765
3766 if (PerfAllowAtExitRegistration) {
3767 // only register atexit functions if PerfAllowAtExitRegistration is set.
3768 // atexit functions can be delayed until process exit time, which
3769 // can be problematic for embedded VM situations. Embedded VMs should
3770 // call DestroyJavaVM() to assure that VM resources are released.
3771
3772 // note: perfMemory_exit_helper atexit function may be removed in
3773 // the future if the appropriate cleanup code can be added to the
3774 // VM_Exit VMOperation's doit method.
3775 if (atexit(perfMemory_exit_helper) != 0) {
3776 warning("os::init_2 atexit(perfMemory_exit_helper) failed");
3777 }
3778 }
3779
3780 #ifndef _WIN64
3781 // Print something if NX is enabled (win32 on AMD64)
3782 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection());
3783 #endif
3784
3785 // initialize thread priority policy
3786 prio_init();
3787
3788 if (UseNUMA && !ForceNUMA) {
3789 UseNUMA = false; // We don't fully support this yet
3790 }
3791
3792 if (UseNUMAInterleaving) {
3793 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag
3794 bool success = numa_interleaving_init();
3795 if (!success) UseNUMAInterleaving = false;
3796 }
3797
3798 return JNI_OK;
3799 }
3800
3801 void os::init_3(void) {
3802 return;
3803 }
3804
3805 // Mark the polling page as unreadable
3806 void os::make_polling_page_unreadable(void) {
3807 DWORD old_status;
3808 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) )
3809 fatal("Could not disable polling page");
3810 };
3811
3812 // Mark the polling page as readable
3813 void os::make_polling_page_readable(void) {
3814 DWORD old_status;
3815 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) )
3816 fatal("Could not enable polling page");
3817 };
3818
3819
3820 int os::stat(const char *path, struct stat *sbuf) {
3821 char pathbuf[MAX_PATH];
3822 if (strlen(path) > MAX_PATH - 1) {
3823 errno = ENAMETOOLONG;
3824 return -1;
3825 }
3826 os::native_path(strcpy(pathbuf, path));
3827 int ret = ::stat(pathbuf, sbuf);
3828 if (sbuf != NULL && UseUTCFileTimestamp) {
3829 // Fix for 6539723. st_mtime returned from stat() is dependent on
3830 // the system timezone and so can return different values for the
3831 // same file if/when daylight savings time changes. This adjustment
3832 // makes sure the same timestamp is returned regardless of the TZ.
3833 //
3834 // See:
3835 // http://msdn.microsoft.com/library/
3836 // default.asp?url=/library/en-us/sysinfo/base/
3837 // time_zone_information_str.asp
3838 // and
3839 // http://msdn.microsoft.com/library/default.asp?url=
3840 // /library/en-us/sysinfo/base/settimezoneinformation.asp
3841 //
3842 // NOTE: there is a insidious bug here: If the timezone is changed
3843 // after the call to stat() but before 'GetTimeZoneInformation()', then
3844 // the adjustment we do here will be wrong and we'll return the wrong
3845 // value (which will likely end up creating an invalid class data
3846 // archive). Absent a better API for this, or some time zone locking
3847 // mechanism, we'll have to live with this risk.
3848 TIME_ZONE_INFORMATION tz;
3849 DWORD tzid = GetTimeZoneInformation(&tz);
3850 int daylightBias =
3851 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias;
3852 sbuf->st_mtime += (tz.Bias + daylightBias) * 60;
3853 }
3854 return ret;
3855 }
3856
3857
3858 #define FT2INT64(ft) \
3859 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime))
3860
3861
3862 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
3863 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
3864 // of a thread.
3865 //
3866 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns
3867 // the fast estimate available on the platform.
3868
3869 // current_thread_cpu_time() is not optimized for Windows yet
3870 jlong os::current_thread_cpu_time() {
3871 // return user + sys since the cost is the same
3872 return os::thread_cpu_time(Thread::current(), true /* user+sys */);
3873 }
3874
3875 jlong os::thread_cpu_time(Thread* thread) {
3876 // consistent with what current_thread_cpu_time() returns.
3877 return os::thread_cpu_time(thread, true /* user+sys */);
3878 }
3879
3880 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
3881 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
3882 }
3883
3884 jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) {
3885 // This code is copy from clasic VM -> hpi::sysThreadCPUTime
3886 // If this function changes, os::is_thread_cpu_time_supported() should too
3887 if (os::win32::is_nt()) {
3888 FILETIME CreationTime;
3889 FILETIME ExitTime;
3890 FILETIME KernelTime;
3891 FILETIME UserTime;
3892
3893 if ( GetThreadTimes(thread->osthread()->thread_handle(),
3894 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
3895 return -1;
3896 else
3897 if (user_sys_cpu_time) {
3898 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100;
3899 } else {
3900 return FT2INT64(UserTime) * 100;
3901 }
3902 } else {
3903 return (jlong) timeGetTime() * 1000000;
3904 }
3905 }
3906
3907 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
3908 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
3909 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
3910 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
3911 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
3912 }
3913
3914 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
3915 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
3916 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
3917 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
3918 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
3919 }
3920
3921 bool os::is_thread_cpu_time_supported() {
3922 // see os::thread_cpu_time
3923 if (os::win32::is_nt()) {
3924 FILETIME CreationTime;
3925 FILETIME ExitTime;
3926 FILETIME KernelTime;
3927 FILETIME UserTime;
3928
3929 if ( GetThreadTimes(GetCurrentThread(),
3930 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
3931 return false;
3932 else
3933 return true;
3934 } else {
3935 return false;
3936 }
3937 }
3938
3939 // Windows does't provide a loadavg primitive so this is stubbed out for now.
3940 // It does have primitives (PDH API) to get CPU usage and run queue length.
3941 // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length"
3942 // If we wanted to implement loadavg on Windows, we have a few options:
3943 //
3944 // a) Query CPU usage and run queue length and "fake" an answer by
3945 // returning the CPU usage if it's under 100%, and the run queue
3946 // length otherwise. It turns out that querying is pretty slow
3947 // on Windows, on the order of 200 microseconds on a fast machine.
3948 // Note that on the Windows the CPU usage value is the % usage
3949 // since the last time the API was called (and the first call
3950 // returns 100%), so we'd have to deal with that as well.
3951 //
3952 // b) Sample the "fake" answer using a sampling thread and store
3953 // the answer in a global variable. The call to loadavg would
3954 // just return the value of the global, avoiding the slow query.
3955 //
3956 // c) Sample a better answer using exponential decay to smooth the
3957 // value. This is basically the algorithm used by UNIX kernels.
3958 //
3959 // Note that sampling thread starvation could affect both (b) and (c).
3960 int os::loadavg(double loadavg[], int nelem) {
3961 return -1;
3962 }
3963
3964
3965 // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield()
3966 bool os::dont_yield() {
3967 return DontYieldALot;
3968 }
3969
3970 // This method is a slightly reworked copy of JDK's sysOpen
3971 // from src/windows/hpi/src/sys_api_md.c
3972
3973 int os::open(const char *path, int oflag, int mode) {
3974 char pathbuf[MAX_PATH];
3975
3976 if (strlen(path) > MAX_PATH - 1) {
3977 errno = ENAMETOOLONG;
3978 return -1;
3979 }
3980 os::native_path(strcpy(pathbuf, path));
3981 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode);
3982 }
3983
3984 // Is a (classpath) directory empty?
3985 bool os::dir_is_empty(const char* path) {
3986 WIN32_FIND_DATA fd;
3987 HANDLE f = FindFirstFile(path, &fd);
3988 if (f == INVALID_HANDLE_VALUE) {
3989 return true;
3990 }
3991 FindClose(f);
3992 return false;
3993 }
3994
3995 // create binary file, rewriting existing file if required
3996 int os::create_binary_file(const char* path, bool rewrite_existing) {
3997 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY;
3998 if (!rewrite_existing) {
3999 oflags |= _O_EXCL;
4000 }
4001 return ::open(path, oflags, _S_IREAD | _S_IWRITE);
4002 }
4003
4004 // return current position of file pointer
4005 jlong os::current_file_offset(int fd) {
4006 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR);
4007 }
4008
4009 // move file pointer to the specified offset
4010 jlong os::seek_to_file_offset(int fd, jlong offset) {
4011 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET);
4012 }
4013
4014
4015 jlong os::lseek(int fd, jlong offset, int whence) {
4016 return (jlong) ::_lseeki64(fd, offset, whence);
4017 }
4018
4019 // This method is a slightly reworked copy of JDK's sysNativePath
4020 // from src/windows/hpi/src/path_md.c
4021
4022 /* Convert a pathname to native format. On win32, this involves forcing all
4023 separators to be '\\' rather than '/' (both are legal inputs, but Win95
4024 sometimes rejects '/') and removing redundant separators. The input path is
4025 assumed to have been converted into the character encoding used by the local
4026 system. Because this might be a double-byte encoding, care is taken to
4027 treat double-byte lead characters correctly.
4028
4029 This procedure modifies the given path in place, as the result is never
4030 longer than the original. There is no error return; this operation always
4031 succeeds. */
4032 char * os::native_path(char *path) {
4033 char *src = path, *dst = path, *end = path;
4034 char *colon = NULL; /* If a drive specifier is found, this will
4035 point to the colon following the drive
4036 letter */
4037
4038 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */
4039 assert(((!::IsDBCSLeadByte('/'))
4040 && (!::IsDBCSLeadByte('\\'))
4041 && (!::IsDBCSLeadByte(':'))),
4042 "Illegal lead byte");
4043
4044 /* Check for leading separators */
4045 #define isfilesep(c) ((c) == '/' || (c) == '\\')
4046 while (isfilesep(*src)) {
4047 src++;
4048 }
4049
4050 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') {
4051 /* Remove leading separators if followed by drive specifier. This
4052 hack is necessary to support file URLs containing drive
4053 specifiers (e.g., "file://c:/path"). As a side effect,
4054 "/c:/path" can be used as an alternative to "c:/path". */
4055 *dst++ = *src++;
4056 colon = dst;
4057 *dst++ = ':';
4058 src++;
4059 } else {
4060 src = path;
4061 if (isfilesep(src[0]) && isfilesep(src[1])) {
4062 /* UNC pathname: Retain first separator; leave src pointed at
4063 second separator so that further separators will be collapsed
4064 into the second separator. The result will be a pathname
4065 beginning with "\\\\" followed (most likely) by a host name. */
4066 src = dst = path + 1;
4067 path[0] = '\\'; /* Force first separator to '\\' */
4068 }
4069 }
4070
4071 end = dst;
4072
4073 /* Remove redundant separators from remainder of path, forcing all
4074 separators to be '\\' rather than '/'. Also, single byte space
4075 characters are removed from the end of the path because those
4076 are not legal ending characters on this operating system.
4077 */
4078 while (*src != '\0') {
4079 if (isfilesep(*src)) {
4080 *dst++ = '\\'; src++;
4081 while (isfilesep(*src)) src++;
4082 if (*src == '\0') {
4083 /* Check for trailing separator */
4084 end = dst;
4085 if (colon == dst - 2) break; /* "z:\\" */
4086 if (dst == path + 1) break; /* "\\" */
4087 if (dst == path + 2 && isfilesep(path[0])) {
4088 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the
4089 beginning of a UNC pathname. Even though it is not, by
4090 itself, a valid UNC pathname, we leave it as is in order
4091 to be consistent with the path canonicalizer as well
4092 as the win32 APIs, which treat this case as an invalid
4093 UNC pathname rather than as an alias for the root
4094 directory of the current drive. */
4095 break;
4096 }
4097 end = --dst; /* Path does not denote a root directory, so
4098 remove trailing separator */
4099 break;
4100 }
4101 end = dst;
4102 } else {
4103 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */
4104 *dst++ = *src++;
4105 if (*src) *dst++ = *src++;
4106 end = dst;
4107 } else { /* Copy a single-byte character */
4108 char c = *src++;
4109 *dst++ = c;
4110 /* Space is not a legal ending character */
4111 if (c != ' ') end = dst;
4112 }
4113 }
4114 }
4115
4116 *end = '\0';
4117
4118 /* For "z:", add "." to work around a bug in the C runtime library */
4119 if (colon == dst - 1) {
4120 path[2] = '.';
4121 path[3] = '\0';
4122 }
4123
4124 #ifdef DEBUG
4125 jio_fprintf(stderr, "sysNativePath: %s\n", path);
4126 #endif DEBUG
4127 return path;
4128 }
4129
4130 // This code is a copy of JDK's sysSetLength
4131 // from src/windows/hpi/src/sys_api_md.c
4132
4133 int os::ftruncate(int fd, jlong length) {
4134 HANDLE h = (HANDLE)::_get_osfhandle(fd);
4135 long high = (long)(length >> 32);
4136 DWORD ret;
4137
4138 if (h == (HANDLE)(-1)) {
4139 return -1;
4140 }
4141
4142 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN);
4143 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) {
4144 return -1;
4145 }
4146
4147 if (::SetEndOfFile(h) == FALSE) {
4148 return -1;
4149 }
4150
4151 return 0;
4152 }
4153
4154
4155 // This code is a copy of JDK's sysSync
4156 // from src/windows/hpi/src/sys_api_md.c
4157 // except for the legacy workaround for a bug in Win 98
4158
4159 int os::fsync(int fd) {
4160 HANDLE handle = (HANDLE)::_get_osfhandle(fd);
4161
4162 if ( (!::FlushFileBuffers(handle)) &&
4163 (GetLastError() != ERROR_ACCESS_DENIED) ) {
4164 /* from winerror.h */
4165 return -1;
4166 }
4167 return 0;
4168 }
4169
4170 static int nonSeekAvailable(int, long *);
4171 static int stdinAvailable(int, long *);
4172
4173 #define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR)
4174 #define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO)
4175
4176 // This code is a copy of JDK's sysAvailable
4177 // from src/windows/hpi/src/sys_api_md.c
4178
4179 int os::available(int fd, jlong *bytes) {
4180 jlong cur, end;
4181 struct _stati64 stbuf64;
4182
4183 if (::_fstati64(fd, &stbuf64) >= 0) {
4184 int mode = stbuf64.st_mode;
4185 if (S_ISCHR(mode) || S_ISFIFO(mode)) {
4186 int ret;
4187 long lpbytes;
4188 if (fd == 0) {
4189 ret = stdinAvailable(fd, &lpbytes);
4190 } else {
4191 ret = nonSeekAvailable(fd, &lpbytes);
4192 }
4193 (*bytes) = (jlong)(lpbytes);
4194 return ret;
4195 }
4196 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) {
4197 return FALSE;
4198 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) {
4199 return FALSE;
4200 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) {
4201 return FALSE;
4202 }
4203 *bytes = end - cur;
4204 return TRUE;
4205 } else {
4206 return FALSE;
4207 }
4208 }
4209
4210 // This code is a copy of JDK's nonSeekAvailable
4211 // from src/windows/hpi/src/sys_api_md.c
4212
4213 static int nonSeekAvailable(int fd, long *pbytes) {
4214 /* This is used for available on non-seekable devices
4215 * (like both named and anonymous pipes, such as pipes
4216 * connected to an exec'd process).
4217 * Standard Input is a special case.
4218 *
4219 */
4220 HANDLE han;
4221
4222 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) {
4223 return FALSE;
4224 }
4225
4226 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) {
4227 /* PeekNamedPipe fails when at EOF. In that case we
4228 * simply make *pbytes = 0 which is consistent with the
4229 * behavior we get on Solaris when an fd is at EOF.
4230 * The only alternative is to raise an Exception,
4231 * which isn't really warranted.
4232 */
4233 if (::GetLastError() != ERROR_BROKEN_PIPE) {
4234 return FALSE;
4235 }
4236 *pbytes = 0;
4237 }
4238 return TRUE;
4239 }
4240
4241 #define MAX_INPUT_EVENTS 2000
4242
4243 // This code is a copy of JDK's stdinAvailable
4244 // from src/windows/hpi/src/sys_api_md.c
4245
4246 static int stdinAvailable(int fd, long *pbytes) {
4247 HANDLE han;
4248 DWORD numEventsRead = 0; /* Number of events read from buffer */
4249 DWORD numEvents = 0; /* Number of events in buffer */
4250 DWORD i = 0; /* Loop index */
4251 DWORD curLength = 0; /* Position marker */
4252 DWORD actualLength = 0; /* Number of bytes readable */
4253 BOOL error = FALSE; /* Error holder */
4254 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */
4255
4256 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
4257 return FALSE;
4258 }
4259
4260 /* Construct an array of input records in the console buffer */
4261 error = ::GetNumberOfConsoleInputEvents(han, &numEvents);
4262 if (error == 0) {
4263 return nonSeekAvailable(fd, pbytes);
4264 }
4265
4266 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */
4267 if (numEvents > MAX_INPUT_EVENTS) {
4268 numEvents = MAX_INPUT_EVENTS;
4269 }
4270
4271 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD));
4272 if (lpBuffer == NULL) {
4273 return FALSE;
4274 }
4275
4276 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead);
4277 if (error == 0) {
4278 os::free(lpBuffer);
4279 return FALSE;
4280 }
4281
4282 /* Examine input records for the number of bytes available */
4283 for(i=0; i<numEvents; i++) {
4284 if (lpBuffer[i].EventType == KEY_EVENT) {
4285
4286 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *)
4287 &(lpBuffer[i].Event);
4288 if (keyRecord->bKeyDown == TRUE) {
4289 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar);
4290 curLength++;
4291 if (*keyPressed == '\r') {
4292 actualLength = curLength;
4293 }
4294 }
4295 }
4296 }
4297
4298 if(lpBuffer != NULL) {
4299 os::free(lpBuffer);
4300 }
4301
4302 *pbytes = (long) actualLength;
4303 return TRUE;
4304 }
4305
4306 // Map a block of memory.
4307 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
4308 char *addr, size_t bytes, bool read_only,
4309 bool allow_exec) {
4310 HANDLE hFile;
4311 char* base;
4312
4313 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
4314 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
4315 if (hFile == NULL) {
4316 if (PrintMiscellaneous && Verbose) {
4317 DWORD err = GetLastError();
4318 tty->print_cr("CreateFile() failed: GetLastError->%ld.");
4319 }
4320 return NULL;
4321 }
4322
4323 if (allow_exec) {
4324 // CreateFileMapping/MapViewOfFileEx can't map executable memory
4325 // unless it comes from a PE image (which the shared archive is not.)
4326 // Even VirtualProtect refuses to give execute access to mapped memory
4327 // that was not previously executable.
4328 //
4329 // Instead, stick the executable region in anonymous memory. Yuck.
4330 // Penalty is that ~4 pages will not be shareable - in the future
4331 // we might consider DLLizing the shared archive with a proper PE
4332 // header so that mapping executable + sharing is possible.
4333
4334 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE,
4335 PAGE_READWRITE);
4336 if (base == NULL) {
4337 if (PrintMiscellaneous && Verbose) {
4338 DWORD err = GetLastError();
4339 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err);
4340 }
4341 CloseHandle(hFile);
4342 return NULL;
4343 }
4344
4345 DWORD bytes_read;
4346 OVERLAPPED overlapped;
4347 overlapped.Offset = (DWORD)file_offset;
4348 overlapped.OffsetHigh = 0;
4349 overlapped.hEvent = NULL;
4350 // ReadFile guarantees that if the return value is true, the requested
4351 // number of bytes were read before returning.
4352 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0;
4353 if (!res) {
4354 if (PrintMiscellaneous && Verbose) {
4355 DWORD err = GetLastError();
4356 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err);
4357 }
4358 release_memory(base, bytes);
4359 CloseHandle(hFile);
4360 return NULL;
4361 }
4362 } else {
4363 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0,
4364 NULL /*file_name*/);
4365 if (hMap == NULL) {
4366 if (PrintMiscellaneous && Verbose) {
4367 DWORD err = GetLastError();
4368 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.");
4369 }
4370 CloseHandle(hFile);
4371 return NULL;
4372 }
4373
4374 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY;
4375 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset,
4376 (DWORD)bytes, addr);
4377 if (base == NULL) {
4378 if (PrintMiscellaneous && Verbose) {
4379 DWORD err = GetLastError();
4380 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err);
4381 }
4382 CloseHandle(hMap);
4383 CloseHandle(hFile);
4384 return NULL;
4385 }
4386
4387 if (CloseHandle(hMap) == 0) {
4388 if (PrintMiscellaneous && Verbose) {
4389 DWORD err = GetLastError();
4390 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err);
4391 }
4392 CloseHandle(hFile);
4393 return base;
4394 }
4395 }
4396
4397 if (allow_exec) {
4398 DWORD old_protect;
4399 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE;
4400 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0;
4401
4402 if (!res) {
4403 if (PrintMiscellaneous && Verbose) {
4404 DWORD err = GetLastError();
4405 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err);
4406 }
4407 // Don't consider this a hard error, on IA32 even if the
4408 // VirtualProtect fails, we should still be able to execute
4409 CloseHandle(hFile);
4410 return base;
4411 }
4412 }
4413
4414 if (CloseHandle(hFile) == 0) {
4415 if (PrintMiscellaneous && Verbose) {
4416 DWORD err = GetLastError();
4417 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err);
4418 }
4419 return base;
4420 }
4421
4422 return base;
4423 }
4424
4425
4426 // Remap a block of memory.
4427 char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
4428 char *addr, size_t bytes, bool read_only,
4429 bool allow_exec) {
4430 // This OS does not allow existing memory maps to be remapped so we
4431 // have to unmap the memory before we remap it.
4432 if (!os::unmap_memory(addr, bytes)) {
4433 return NULL;
4434 }
4435
4436 // There is a very small theoretical window between the unmap_memory()
4437 // call above and the map_memory() call below where a thread in native
4438 // code may be able to access an address that is no longer mapped.
4439
4440 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
4441 allow_exec);
4442 }
4443
4444
4445 // Unmap a block of memory.
4446 // Returns true=success, otherwise false.
4447
4448 bool os::unmap_memory(char* addr, size_t bytes) {
4449 BOOL result = UnmapViewOfFile(addr);
4450 if (result == 0) {
4451 if (PrintMiscellaneous && Verbose) {
4452 DWORD err = GetLastError();
4453 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err);
4454 }
4455 return false;
4456 }
4457 return true;
4458 }
4459
4460 void os::pause() {
4461 char filename[MAX_PATH];
4462 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
4463 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
4464 } else {
4465 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
4466 }
4467
4468 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
4469 if (fd != -1) {
4470 struct stat buf;
4471 ::close(fd);
4472 while (::stat(filename, &buf) == 0) {
4473 Sleep(100);
4474 }
4475 } else {
4476 jio_fprintf(stderr,
4477 "Could not open pause file '%s', continuing immediately.\n", filename);
4478 }
4479 }
4480
4481 // An Event wraps a win32 "CreateEvent" kernel handle.
4482 //
4483 // We have a number of choices regarding "CreateEvent" win32 handle leakage:
4484 //
4485 // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle
4486 // field, and call CloseHandle() on the win32 event handle. Unpark() would
4487 // need to be modified to tolerate finding a NULL (invalid) win32 event handle.
4488 // In addition, an unpark() operation might fetch the handle field, but the
4489 // event could recycle between the fetch and the SetEvent() operation.
4490 // SetEvent() would either fail because the handle was invalid, or inadvertently work,
4491 // as the win32 handle value had been recycled. In an ideal world calling SetEvent()
4492 // on an stale but recycled handle would be harmless, but in practice this might
4493 // confuse other non-Sun code, so it's not a viable approach.
4494 //
4495 // 2: Once a win32 event handle is associated with an Event, it remains associated
4496 // with the Event. The event handle is never closed. This could be construed
4497 // as handle leakage, but only up to the maximum # of threads that have been extant
4498 // at any one time. This shouldn't be an issue, as windows platforms typically
4499 // permit a process to have hundreds of thousands of open handles.
4500 //
4501 // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList
4502 // and release unused handles.
4503 //
4504 // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle.
4505 // It's not clear, however, that we wouldn't be trading one type of leak for another.
4506 //
4507 // 5. Use an RCU-like mechanism (Read-Copy Update).
4508 // Or perhaps something similar to Maged Michael's "Hazard pointers".
4509 //
4510 // We use (2).
4511 //
4512 // TODO-FIXME:
4513 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation.
4514 // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks
4515 // to recover from (or at least detect) the dreaded Windows 841176 bug.
4516 // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent
4517 // into a single win32 CreateEvent() handle.
4518 //
4519 // _Event transitions in park()
4520 // -1 => -1 : illegal
4521 // 1 => 0 : pass - return immediately
4522 // 0 => -1 : block
4523 //
4524 // _Event serves as a restricted-range semaphore :
4525 // -1 : thread is blocked
4526 // 0 : neutral - thread is running or ready
4527 // 1 : signaled - thread is running or ready
4528 //
4529 // Another possible encoding of _Event would be
4530 // with explicit "PARKED" and "SIGNALED" bits.
4531
4532 int os::PlatformEvent::park (jlong Millis) {
4533 guarantee (_ParkHandle != NULL , "Invariant") ;
4534 guarantee (Millis > 0 , "Invariant") ;
4535 int v ;
4536
4537 // CONSIDER: defer assigning a CreateEvent() handle to the Event until
4538 // the initial park() operation.
4539
4540 for (;;) {
4541 v = _Event ;
4542 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
4543 }
4544 guarantee ((v == 0) || (v == 1), "invariant") ;
4545 if (v != 0) return OS_OK ;
4546
4547 // Do this the hard way by blocking ...
4548 // TODO: consider a brief spin here, gated on the success of recent
4549 // spin attempts by this thread.
4550 //
4551 // We decompose long timeouts into series of shorter timed waits.
4552 // Evidently large timo values passed in WaitForSingleObject() are problematic on some
4553 // versions of Windows. See EventWait() for details. This may be superstition. Or not.
4554 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time
4555 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from
4556 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend
4557 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv ==
4558 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate
4559 // for the already waited time. This policy does not admit any new outcomes.
4560 // In the future, however, we might want to track the accumulated wait time and
4561 // adjust Millis accordingly if we encounter a spurious wakeup.
4562
4563 const int MAXTIMEOUT = 0x10000000 ;
4564 DWORD rv = WAIT_TIMEOUT ;
4565 while (_Event < 0 && Millis > 0) {
4566 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT)
4567 if (Millis > MAXTIMEOUT) {
4568 prd = MAXTIMEOUT ;
4569 }
4570 rv = ::WaitForSingleObject (_ParkHandle, prd) ;
4571 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ;
4572 if (rv == WAIT_TIMEOUT) {
4573 Millis -= prd ;
4574 }
4575 }
4576 v = _Event ;
4577 _Event = 0 ;
4578 OrderAccess::fence() ;
4579 // If we encounter a nearly simultanous timeout expiry and unpark()
4580 // we return OS_OK indicating we awoke via unpark().
4581 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however.
4582 return (v >= 0) ? OS_OK : OS_TIMEOUT ;
4583 }
4584
4585 void os::PlatformEvent::park () {
4586 guarantee (_ParkHandle != NULL, "Invariant") ;
4587 // Invariant: Only the thread associated with the Event/PlatformEvent
4588 // may call park().
4589 int v ;
4590 for (;;) {
4591 v = _Event ;
4592 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
4593 }
4594 guarantee ((v == 0) || (v == 1), "invariant") ;
4595 if (v != 0) return ;
4596
4597 // Do this the hard way by blocking ...
4598 // TODO: consider a brief spin here, gated on the success of recent
4599 // spin attempts by this thread.
4600 while (_Event < 0) {
4601 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ;
4602 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ;
4603 }
4604
4605 // Usually we'll find _Event == 0 at this point, but as
4606 // an optional optimization we clear it, just in case can
4607 // multiple unpark() operations drove _Event up to 1.
4608 _Event = 0 ;
4609 OrderAccess::fence() ;
4610 guarantee (_Event >= 0, "invariant") ;
4611 }
4612
4613 void os::PlatformEvent::unpark() {
4614 guarantee (_ParkHandle != NULL, "Invariant") ;
4615 int v ;
4616 for (;;) {
4617 v = _Event ; // Increment _Event if it's < 1.
4618 if (v > 0) {
4619 // If it's already signaled just return.
4620 // The LD of _Event could have reordered or be satisfied
4621 // by a read-aside from this processor's write buffer.
4622 // To avoid problems execute a barrier and then
4623 // ratify the value. A degenerate CAS() would also work.
4624 // Viz., CAS (v+0, &_Event, v) == v).
4625 OrderAccess::fence() ;
4626 if (_Event == v) return ;
4627 continue ;
4628 }
4629 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
4630 }
4631 if (v < 0) {
4632 ::SetEvent (_ParkHandle) ;
4633 }
4634 }
4635
4636
4637 // JSR166
4638 // -------------------------------------------------------
4639
4640 /*
4641 * The Windows implementation of Park is very straightforward: Basic
4642 * operations on Win32 Events turn out to have the right semantics to
4643 * use them directly. We opportunistically resuse the event inherited
4644 * from Monitor.
4645 */
4646
4647
4648 void Parker::park(bool isAbsolute, jlong time) {
4649 guarantee (_ParkEvent != NULL, "invariant") ;
4650 // First, demultiplex/decode time arguments
4651 if (time < 0) { // don't wait
4652 return;
4653 }
4654 else if (time == 0 && !isAbsolute) {
4655 time = INFINITE;
4656 }
4657 else if (isAbsolute) {
4658 time -= os::javaTimeMillis(); // convert to relative time
4659 if (time <= 0) // already elapsed
4660 return;
4661 }
4662 else { // relative
4663 time /= 1000000; // Must coarsen from nanos to millis
4664 if (time == 0) // Wait for the minimal time unit if zero
4665 time = 1;
4666 }
4667
4668 JavaThread* thread = (JavaThread*)(Thread::current());
4669 assert(thread->is_Java_thread(), "Must be JavaThread");
4670 JavaThread *jt = (JavaThread *)thread;
4671
4672 // Don't wait if interrupted or already triggered
4673 if (Thread::is_interrupted(thread, false) ||
4674 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) {
4675 ResetEvent(_ParkEvent);
4676 return;
4677 }
4678 else {
4679 ThreadBlockInVM tbivm(jt);
4680 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
4681 jt->set_suspend_equivalent();
4682
4683 WaitForSingleObject(_ParkEvent, time);
4684 ResetEvent(_ParkEvent);
4685
4686 // If externally suspended while waiting, re-suspend
4687 if (jt->handle_special_suspend_equivalent_condition()) {
4688 jt->java_suspend_self();
4689 }
4690 }
4691 }
4692
4693 void Parker::unpark() {
4694 guarantee (_ParkEvent != NULL, "invariant") ;
4695 SetEvent(_ParkEvent);
4696 }
4697
4698 // Run the specified command in a separate process. Return its exit value,
4699 // or -1 on failure (e.g. can't create a new process).
4700 int os::fork_and_exec(char* cmd) {
4701 STARTUPINFO si;
4702 PROCESS_INFORMATION pi;
4703
4704 memset(&si, 0, sizeof(si));
4705 si.cb = sizeof(si);
4706 memset(&pi, 0, sizeof(pi));
4707 BOOL rslt = CreateProcess(NULL, // executable name - use command line
4708 cmd, // command line
4709 NULL, // process security attribute
4710 NULL, // thread security attribute
4711 TRUE, // inherits system handles
4712 0, // no creation flags
4713 NULL, // use parent's environment block
4714 NULL, // use parent's starting directory
4715 &si, // (in) startup information
4716 &pi); // (out) process information
4717
4718 if (rslt) {
4719 // Wait until child process exits.
4720 WaitForSingleObject(pi.hProcess, INFINITE);
4721
4722 DWORD exit_code;
4723 GetExitCodeProcess(pi.hProcess, &exit_code);
4724
4725 // Close process and thread handles.
4726 CloseHandle(pi.hProcess);
4727 CloseHandle(pi.hThread);
4728
4729 return (int)exit_code;
4730 } else {
4731 return -1;
4732 }
4733 }
4734
4735 //--------------------------------------------------------------------------------------------------
4736 // Non-product code
4737
4738 static int mallocDebugIntervalCounter = 0;
4739 static int mallocDebugCounter = 0;
4740 bool os::check_heap(bool force) {
4741 if (++mallocDebugCounter < MallocVerifyStart && !force) return true;
4742 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) {
4743 // Note: HeapValidate executes two hardware breakpoints when it finds something
4744 // wrong; at these points, eax contains the address of the offending block (I think).
4745 // To get to the exlicit error message(s) below, just continue twice.
4746 HANDLE heap = GetProcessHeap();
4747 { HeapLock(heap);
4748 PROCESS_HEAP_ENTRY phe;
4749 phe.lpData = NULL;
4750 while (HeapWalk(heap, &phe) != 0) {
4751 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) &&
4752 !HeapValidate(heap, 0, phe.lpData)) {
4753 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter);
4754 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData);
4755 fatal("corrupted C heap");
4756 }
4757 }
4758 DWORD err = GetLastError();
4759 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) {
4760 fatal(err_msg("heap walk aborted with error %d", err));
4761 }
4762 HeapUnlock(heap);
4763 }
4764 mallocDebugIntervalCounter = 0;
4765 }
4766 return true;
4767 }
4768
4769
4770 bool os::find(address addr, outputStream* st) {
4771 // Nothing yet
4772 return false;
4773 }
4774
4775 LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) {
4776 DWORD exception_code = e->ExceptionRecord->ExceptionCode;
4777
4778 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
4779 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow();
4780 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord;
4781 address addr = (address) exceptionRecord->ExceptionInformation[1];
4782
4783 if (os::is_memory_serialize_page(thread, addr))
4784 return EXCEPTION_CONTINUE_EXECUTION;
4785 }
4786
4787 return EXCEPTION_CONTINUE_SEARCH;
4788 }
4789
4790 // We don't build a headless jre for Windows
4791 bool os::is_headless_jre() { return false; }
4792
4793
4794 typedef CRITICAL_SECTION mutex_t;
4795 #define mutexInit(m) InitializeCriticalSection(m)
4796 #define mutexDestroy(m) DeleteCriticalSection(m)
4797 #define mutexLock(m) EnterCriticalSection(m)
4798 #define mutexUnlock(m) LeaveCriticalSection(m)
4799
4800 static bool sock_initialized = FALSE;
4801 static mutex_t sockFnTableMutex;
4802
4803 static void initSock() {
4804 WSADATA wsadata;
4805
4806 if (!os::WinSock2Dll::WinSock2Available()) {
4807 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n",
4808 ::GetLastError());
4809 return;
4810 }
4811 if (sock_initialized == TRUE) return;
4812
4813 ::mutexInit(&sockFnTableMutex);
4814 ::mutexLock(&sockFnTableMutex);
4815 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) {
4816 jio_fprintf(stderr, "Could not initialize Winsock\n");
4817 }
4818 sock_initialized = TRUE;
4819 ::mutexUnlock(&sockFnTableMutex);
4820 }
4821
4822 struct hostent* os::get_host_by_name(char* name) {
4823 if (!sock_initialized) {
4824 initSock();
4825 }
4826 if (!os::WinSock2Dll::WinSock2Available()) {
4827 return NULL;
4828 }
4829 return (struct hostent*)os::WinSock2Dll::gethostbyname(name);
4830 }
4831
4832
4833 int os::socket_close(int fd) {
4834 ShouldNotReachHere();
4835 return 0;
4836 }
4837
4838 int os::socket_available(int fd, jint *pbytes) {
4839 ShouldNotReachHere();
4840 return 0;
4841 }
4842
4843 int os::socket(int domain, int type, int protocol) {
4844 ShouldNotReachHere();
4845 return 0;
4846 }
4847
4848 int os::listen(int fd, int count) {
4849 ShouldNotReachHere();
4850 return 0;
4851 }
4852
4853 int os::connect(int fd, struct sockaddr* him, socklen_t len) {
4854 ShouldNotReachHere();
4855 return 0;
4856 }
4857
4858 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
4859 ShouldNotReachHere();
4860 return 0;
4861 }
4862
4863 int os::sendto(int fd, char* buf, size_t len, uint flags,
4864 struct sockaddr* to, socklen_t tolen) {
4865 ShouldNotReachHere();
4866 return 0;
4867 }
4868
4869 int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags,
4870 sockaddr* from, socklen_t* fromlen) {
4871 ShouldNotReachHere();
4872 return 0;
4873 }
4874
4875 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
4876 ShouldNotReachHere();
4877 return 0;
4878 }
4879
4880 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
4881 ShouldNotReachHere();
4882 return 0;
4883 }
4884
4885 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
4886 ShouldNotReachHere();
4887 return 0;
4888 }
4889
4890 int os::timeout(int fd, long timeout) {
4891 ShouldNotReachHere();
4892 return 0;
4893 }
4894
4895 int os::get_host_name(char* name, int namelen) {
4896 ShouldNotReachHere();
4897 return 0;
4898 }
4899
4900 int os::socket_shutdown(int fd, int howto) {
4901 ShouldNotReachHere();
4902 return 0;
4903 }
4904
4905 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
4906 ShouldNotReachHere();
4907 return 0;
4908 }
4909
4910 int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
4911 ShouldNotReachHere();
4912 return 0;
4913 }
4914
4915 int os::get_sock_opt(int fd, int level, int optname,
4916 char* optval, socklen_t* optlen) {
4917 ShouldNotReachHere();
4918 return 0;
4919 }
4920
4921 int os::set_sock_opt(int fd, int level, int optname,
4922 const char* optval, socklen_t optlen) {
4923 ShouldNotReachHere();
4924 return 0;
4925 }
4926
4927
4928 // Kernel32 API
4929 typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void);
4930 typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD);
4931 typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG);
4932 typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG);
4933
4934 GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL;
4935 VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL;
4936 GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL;
4937 GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL;
4938 BOOL os::Kernel32Dll::initialized = FALSE;
4939 SIZE_T os::Kernel32Dll::GetLargePageMinimum() {
4940 assert(initialized && _GetLargePageMinimum != NULL,
4941 "GetLargePageMinimumAvailable() not yet called");
4942 return _GetLargePageMinimum();
4943 }
4944
4945 BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() {
4946 if (!initialized) {
4947 initialize();
4948 }
4949 return _GetLargePageMinimum != NULL;
4950 }
4951
4952 BOOL os::Kernel32Dll::NumaCallsAvailable() {
4953 if (!initialized) {
4954 initialize();
4955 }
4956 return _VirtualAllocExNuma != NULL;
4957 }
4958
4959 LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) {
4960 assert(initialized && _VirtualAllocExNuma != NULL,
4961 "NUMACallsAvailable() not yet called");
4962
4963 return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node);
4964 }
4965
4966 BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) {
4967 assert(initialized && _GetNumaHighestNodeNumber != NULL,
4968 "NUMACallsAvailable() not yet called");
4969
4970 return _GetNumaHighestNodeNumber(ptr_highest_node_number);
4971 }
4972
4973 BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) {
4974 assert(initialized && _GetNumaNodeProcessorMask != NULL,
4975 "NUMACallsAvailable() not yet called");
4976
4977 return _GetNumaNodeProcessorMask(node, proc_mask);
4978 }
4979
4980
4981 void os::Kernel32Dll::initializeCommon() {
4982 if (!initialized) {
4983 HMODULE handle = ::GetModuleHandle("Kernel32.dll");
4984 assert(handle != NULL, "Just check");
4985 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum");
4986 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma");
4987 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber");
4988 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask");
4989 initialized = TRUE;
4990 }
4991 }
4992
4993
4994
4995 #ifndef JDK6_OR_EARLIER
4996
4997 void os::Kernel32Dll::initialize() {
4998 initializeCommon();
4999 }
5000
5001
5002 // Kernel32 API
5003 inline BOOL os::Kernel32Dll::SwitchToThread() {
5004 return ::SwitchToThread();
5005 }
5006
5007 inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
5008 return true;
5009 }
5010
5011 // Help tools
5012 inline BOOL os::Kernel32Dll::HelpToolsAvailable() {
5013 return true;
5014 }
5015
5016 inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
5017 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
5018 }
5019
5020 inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5021 return ::Module32First(hSnapshot, lpme);
5022 }
5023
5024 inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5025 return ::Module32Next(hSnapshot, lpme);
5026 }
5027
5028
5029 inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
5030 return true;
5031 }
5032
5033 inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
5034 ::GetNativeSystemInfo(lpSystemInfo);
5035 }
5036
5037 // PSAPI API
5038 inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
5039 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
5040 }
5041
5042 inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
5043 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
5044 }
5045
5046 inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
5047 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
5048 }
5049
5050 inline BOOL os::PSApiDll::PSApiAvailable() {
5051 return true;
5052 }
5053
5054
5055 // WinSock2 API
5056 inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
5057 return ::WSAStartup(wVersionRequested, lpWSAData);
5058 }
5059
5060 inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
5061 return ::gethostbyname(name);
5062 }
5063
5064 inline BOOL os::WinSock2Dll::WinSock2Available() {
5065 return true;
5066 }
5067
5068 // Advapi API
5069 inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
5070 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
5071 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
5072 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
5073 BufferLength, PreviousState, ReturnLength);
5074 }
5075
5076 inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
5077 PHANDLE TokenHandle) {
5078 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
5079 }
5080
5081 inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
5082 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
5083 }
5084
5085 inline BOOL os::Advapi32Dll::AdvapiAvailable() {
5086 return true;
5087 }
5088
5089 #else
5090 // Kernel32 API
5091 typedef BOOL (WINAPI* SwitchToThread_Fn)(void);
5092 typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD);
5093 typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32);
5094 typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32);
5095 typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO);
5096
5097 SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL;
5098 CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL;
5099 Module32First_Fn os::Kernel32Dll::_Module32First = NULL;
5100 Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL;
5101 GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL;
5102
5103
5104 void os::Kernel32Dll::initialize() {
5105 if (!initialized) {
5106 HMODULE handle = ::GetModuleHandle("Kernel32.dll");
5107 assert(handle != NULL, "Just check");
5108
5109 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread");
5110 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn)
5111 ::GetProcAddress(handle, "CreateToolhelp32Snapshot");
5112 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First");
5113 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next");
5114 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo");
5115 initializeCommon(); // resolve the functions that always need resolving
5116
5117 initialized = TRUE;
5118 }
5119 }
5120
5121 BOOL os::Kernel32Dll::SwitchToThread() {
5122 assert(initialized && _SwitchToThread != NULL,
5123 "SwitchToThreadAvailable() not yet called");
5124 return _SwitchToThread();
5125 }
5126
5127
5128 BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
5129 if (!initialized) {
5130 initialize();
5131 }
5132 return _SwitchToThread != NULL;
5133 }
5134
5135 // Help tools
5136 BOOL os::Kernel32Dll::HelpToolsAvailable() {
5137 if (!initialized) {
5138 initialize();
5139 }
5140 return _CreateToolhelp32Snapshot != NULL &&
5141 _Module32First != NULL &&
5142 _Module32Next != NULL;
5143 }
5144
5145 HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
5146 assert(initialized && _CreateToolhelp32Snapshot != NULL,
5147 "HelpToolsAvailable() not yet called");
5148
5149 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
5150 }
5151
5152 BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5153 assert(initialized && _Module32First != NULL,
5154 "HelpToolsAvailable() not yet called");
5155
5156 return _Module32First(hSnapshot, lpme);
5157 }
5158
5159 inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5160 assert(initialized && _Module32Next != NULL,
5161 "HelpToolsAvailable() not yet called");
5162
5163 return _Module32Next(hSnapshot, lpme);
5164 }
5165
5166
5167 BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
5168 if (!initialized) {
5169 initialize();
5170 }
5171 return _GetNativeSystemInfo != NULL;
5172 }
5173
5174 void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
5175 assert(initialized && _GetNativeSystemInfo != NULL,
5176 "GetNativeSystemInfoAvailable() not yet called");
5177
5178 _GetNativeSystemInfo(lpSystemInfo);
5179 }
5180
5181
5182
5183 // PSAPI API
5184
5185
5186 typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD);
5187 typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);;
5188 typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD);
5189
5190 EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL;
5191 GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL;
5192 GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL;
5193 BOOL os::PSApiDll::initialized = FALSE;
5194
5195 void os::PSApiDll::initialize() {
5196 if (!initialized) {
5197 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0);
5198 if (handle != NULL) {
5199 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle,
5200 "EnumProcessModules");
5201 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle,
5202 "GetModuleFileNameExA");
5203 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle,
5204 "GetModuleInformation");
5205 }
5206 initialized = TRUE;
5207 }
5208 }
5209
5210
5211
5212 BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
5213 assert(initialized && _EnumProcessModules != NULL,
5214 "PSApiAvailable() not yet called");
5215 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
5216 }
5217
5218 DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
5219 assert(initialized && _GetModuleFileNameEx != NULL,
5220 "PSApiAvailable() not yet called");
5221 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
5222 }
5223
5224 BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
5225 assert(initialized && _GetModuleInformation != NULL,
5226 "PSApiAvailable() not yet called");
5227 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
5228 }
5229
5230 BOOL os::PSApiDll::PSApiAvailable() {
5231 if (!initialized) {
5232 initialize();
5233 }
5234 return _EnumProcessModules != NULL &&
5235 _GetModuleFileNameEx != NULL &&
5236 _GetModuleInformation != NULL;
5237 }
5238
5239
5240 // WinSock2 API
5241 typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA);
5242 typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...);
5243
5244 WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL;
5245 gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL;
5246 BOOL os::WinSock2Dll::initialized = FALSE;
5247
5248 void os::WinSock2Dll::initialize() {
5249 if (!initialized) {
5250 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0);
5251 if (handle != NULL) {
5252 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup");
5253 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname");
5254 }
5255 initialized = TRUE;
5256 }
5257 }
5258
5259
5260 BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
5261 assert(initialized && _WSAStartup != NULL,
5262 "WinSock2Available() not yet called");
5263 return _WSAStartup(wVersionRequested, lpWSAData);
5264 }
5265
5266 struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
5267 assert(initialized && _gethostbyname != NULL,
5268 "WinSock2Available() not yet called");
5269 return _gethostbyname(name);
5270 }
5271
5272 BOOL os::WinSock2Dll::WinSock2Available() {
5273 if (!initialized) {
5274 initialize();
5275 }
5276 return _WSAStartup != NULL &&
5277 _gethostbyname != NULL;
5278 }
5279
5280 typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
5281 typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE);
5282 typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID);
5283
5284 AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL;
5285 OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL;
5286 LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL;
5287 BOOL os::Advapi32Dll::initialized = FALSE;
5288
5289 void os::Advapi32Dll::initialize() {
5290 if (!initialized) {
5291 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0);
5292 if (handle != NULL) {
5293 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle,
5294 "AdjustTokenPrivileges");
5295 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle,
5296 "OpenProcessToken");
5297 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle,
5298 "LookupPrivilegeValueA");
5299 }
5300 initialized = TRUE;
5301 }
5302 }
5303
5304 BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
5305 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
5306 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
5307 assert(initialized && _AdjustTokenPrivileges != NULL,
5308 "AdvapiAvailable() not yet called");
5309 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
5310 BufferLength, PreviousState, ReturnLength);
5311 }
5312
5313 BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
5314 PHANDLE TokenHandle) {
5315 assert(initialized && _OpenProcessToken != NULL,
5316 "AdvapiAvailable() not yet called");
5317 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
5318 }
5319
5320 BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
5321 assert(initialized && _LookupPrivilegeValue != NULL,
5322 "AdvapiAvailable() not yet called");
5323 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
5324 }
5325
5326 BOOL os::Advapi32Dll::AdvapiAvailable() {
5327 if (!initialized) {
5328 initialize();
5329 }
5330 return _AdjustTokenPrivileges != NULL &&
5331 _OpenProcessToken != NULL &&
5332 _LookupPrivilegeValue != NULL;
5333 }
5334
5335 #endif
5336