1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // Must be at least Windows 2000 or XP to use IsDebuggerPresent
26 #define _WIN32_WINNT 0x500
27
28 // no precompiled headers
29 #include "classfile/classLoader.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/icBuffer.hpp"
33 #include "code/vtableStubs.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/disassembler.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "jvm_windows.h"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/filemap.hpp"
40 #include "mutex_windows.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "os_share_windows.hpp"
43 #include "prims/jniFastGetField.hpp"
44 #include "prims/jvm.h"
45 #include "prims/jvm_misc.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/extendedPC.hpp"
48 #include "runtime/globals.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/mutexLocker.hpp"
53 #include "runtime/objectMonitor.hpp"
54 #include "runtime/osThread.hpp"
55 #include "runtime/perfMemory.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/statSampler.hpp"
58 #include "runtime/stubRoutines.hpp"
59 #include "runtime/thread.inline.hpp"
60 #include "runtime/threadCritical.hpp"
61 #include "runtime/timer.hpp"
62 #include "services/attachListener.hpp"
63 #include "services/runtimeService.hpp"
64 #include "utilities/decoder.hpp"
65 #include "utilities/defaultStream.hpp"
66 #include "utilities/events.hpp"
67 #include "utilities/growableArray.hpp"
68 #include "utilities/vmError.hpp"
69
70 #ifdef _DEBUG
71 #include <crtdbg.h>
72 #endif
73
74
75 #include <windows.h>
76 #include <sys/types.h>
77 #include <sys/stat.h>
78 #include <sys/timeb.h>
79 #include <objidl.h>
80 #include <shlobj.h>
81
82 #include <malloc.h>
83 #include <signal.h>
84 #include <direct.h>
85 #include <errno.h>
86 #include <fcntl.h>
87 #include <io.h>
88 #include <process.h> // For _beginthreadex(), _endthreadex()
89 #include <imagehlp.h> // For os::dll_address_to_function_name
90 /* for enumerating dll libraries */
91 #include <vdmdbg.h>
92
93 // for timer info max values which include all bits
94 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
95
96 // For DLL loading/load error detection
97 // Values of PE COFF
98 #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c
99 #define IMAGE_FILE_SIGNATURE_LENGTH 4
100
101 static HANDLE main_process;
102 static HANDLE main_thread;
103 static int main_thread_id;
104
105 static FILETIME process_creation_time;
106 static FILETIME process_exit_time;
107 static FILETIME process_user_time;
108 static FILETIME process_kernel_time;
109
110 #ifdef _M_IA64
111 #define __CPU__ ia64
112 #elif _M_AMD64
113 #define __CPU__ amd64
114 #else
115 #define __CPU__ i486
116 #endif
117
118 // save DLL module handle, used by GetModuleFileName
119
120 HINSTANCE vm_lib_handle;
121
122 BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
123 switch (reason) {
124 case DLL_PROCESS_ATTACH:
125 vm_lib_handle = hinst;
126 if(ForceTimeHighResolution)
127 timeBeginPeriod(1L);
128 break;
129 case DLL_PROCESS_DETACH:
130 if(ForceTimeHighResolution)
131 timeEndPeriod(1L);
132 break;
133 default:
134 break;
135 }
136 return true;
137 }
138
139 static inline double fileTimeAsDouble(FILETIME* time) {
140 const double high = (double) ((unsigned int) ~0);
141 const double split = 10000000.0;
142 double result = (time->dwLowDateTime / split) +
143 time->dwHighDateTime * (high/split);
144 return result;
145 }
146
147 // Implementation of os
148
149 bool os::getenv(const char* name, char* buffer, int len) {
150 int result = GetEnvironmentVariable(name, buffer, len);
151 return result > 0 && result < len;
152 }
153
154
155 // No setuid programs under Windows.
156 bool os::have_special_privileges() {
157 return false;
158 }
159
160
161 // This method is a periodic task to check for misbehaving JNI applications
162 // under CheckJNI, we can add any periodic checks here.
163 // For Windows at the moment does nothing
164 void os::run_periodic_checks() {
165 return;
166 }
167
168 #ifndef _WIN64
169 // previous UnhandledExceptionFilter, if there is one
170 static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL;
171
172 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo);
173 #endif
174 void os::init_system_properties_values() {
175 /* sysclasspath, java_home, dll_dir */
176 {
177 char *home_path;
178 char *dll_path;
179 char *pslash;
180 char *bin = "\\bin";
181 char home_dir[MAX_PATH];
182
183 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) {
184 os::jvm_path(home_dir, sizeof(home_dir));
185 // Found the full path to jvm[_g].dll.
186 // Now cut the path to <java_home>/jre if we can.
187 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */
188 pslash = strrchr(home_dir, '\\');
189 if (pslash != NULL) {
190 *pslash = '\0'; /* get rid of \{client|server} */
191 pslash = strrchr(home_dir, '\\');
192 if (pslash != NULL)
193 *pslash = '\0'; /* get rid of \bin */
194 }
195 }
196
197 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1, mtInternal);
198 if (home_path == NULL)
199 return;
200 strcpy(home_path, home_dir);
201 Arguments::set_java_home(home_path);
202
203 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1, mtInternal);
204 if (dll_path == NULL)
205 return;
206 strcpy(dll_path, home_dir);
207 strcat(dll_path, bin);
208 Arguments::set_dll_dir(dll_path);
209
210 if (!set_boot_path('\\', ';'))
211 return;
212 }
213
214 /* library_path */
215 #define EXT_DIR "\\lib\\ext"
216 #define BIN_DIR "\\bin"
217 #define PACKAGE_DIR "\\Sun\\Java"
218 {
219 /* Win32 library search order (See the documentation for LoadLibrary):
220 *
221 * 1. The directory from which application is loaded.
222 * 2. The system wide Java Extensions directory (Java only)
223 * 3. System directory (GetSystemDirectory)
224 * 4. Windows directory (GetWindowsDirectory)
225 * 5. The PATH environment variable
226 * 6. The current directory
227 */
228
229 char *library_path;
230 char tmp[MAX_PATH];
231 char *path_str = ::getenv("PATH");
232
233 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) +
234 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10, mtInternal);
235
236 library_path[0] = '\0';
237
238 GetModuleFileName(NULL, tmp, sizeof(tmp));
239 *(strrchr(tmp, '\\')) = '\0';
240 strcat(library_path, tmp);
241
242 GetWindowsDirectory(tmp, sizeof(tmp));
243 strcat(library_path, ";");
244 strcat(library_path, tmp);
245 strcat(library_path, PACKAGE_DIR BIN_DIR);
246
247 GetSystemDirectory(tmp, sizeof(tmp));
248 strcat(library_path, ";");
249 strcat(library_path, tmp);
250
251 GetWindowsDirectory(tmp, sizeof(tmp));
252 strcat(library_path, ";");
253 strcat(library_path, tmp);
254
255 if (path_str) {
256 strcat(library_path, ";");
257 strcat(library_path, path_str);
258 }
259
260 strcat(library_path, ";.");
261
262 Arguments::set_library_path(library_path);
263 FREE_C_HEAP_ARRAY(char, library_path, mtInternal);
264 }
265
266 /* Default extensions directory */
267 {
268 char path[MAX_PATH];
269 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1];
270 GetWindowsDirectory(path, MAX_PATH);
271 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR,
272 path, PACKAGE_DIR, EXT_DIR);
273 Arguments::set_ext_dirs(buf);
274 }
275 #undef EXT_DIR
276 #undef BIN_DIR
277 #undef PACKAGE_DIR
278
279 /* Default endorsed standards directory. */
280 {
281 #define ENDORSED_DIR "\\lib\\endorsed"
282 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR);
283 char * buf = NEW_C_HEAP_ARRAY(char, len, mtInternal);
284 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR);
285 Arguments::set_endorsed_dirs(buf);
286 #undef ENDORSED_DIR
287 }
288
289 #ifndef _WIN64
290 // set our UnhandledExceptionFilter and save any previous one
291 prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception);
292 #endif
293
294 // Done
295 return;
296 }
297
298 void os::breakpoint() {
299 DebugBreak();
300 }
301
302 // Invoked from the BREAKPOINT Macro
303 extern "C" void breakpoint() {
304 os::breakpoint();
305 }
306
307 /*
308 * RtlCaptureStackBackTrace Windows API may not exist prior to Windows XP.
309 * So far, this method is only used by Native Memory Tracking, which is
310 * only supported on Windows XP or later.
311 */
312 address os::get_caller_pc(int n) {
313 #ifdef _NMT_NOINLINE_
314 n ++;
315 #endif
316 address pc;
317 if (os::Kernel32Dll::RtlCaptureStackBackTrace(n + 1, 1, (PVOID*)&pc, NULL) == 1) {
318 return pc;
319 }
320 return NULL;
321 }
322
323
324 // os::current_stack_base()
325 //
326 // Returns the base of the stack, which is the stack's
327 // starting address. This function must be called
328 // while running on the stack of the thread being queried.
329
330 address os::current_stack_base() {
331 MEMORY_BASIC_INFORMATION minfo;
332 address stack_bottom;
333 size_t stack_size;
334
335 VirtualQuery(&minfo, &minfo, sizeof(minfo));
336 stack_bottom = (address)minfo.AllocationBase;
337 stack_size = minfo.RegionSize;
338
339 // Add up the sizes of all the regions with the same
340 // AllocationBase.
341 while( 1 )
342 {
343 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo));
344 if ( stack_bottom == (address)minfo.AllocationBase )
345 stack_size += minfo.RegionSize;
346 else
347 break;
348 }
349
350 #ifdef _M_IA64
351 // IA64 has memory and register stacks
352 stack_size = stack_size / 2;
353 #endif
354 return stack_bottom + stack_size;
355 }
356
357 size_t os::current_stack_size() {
358 size_t sz;
359 MEMORY_BASIC_INFORMATION minfo;
360 VirtualQuery(&minfo, &minfo, sizeof(minfo));
361 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
362 return sz;
363 }
364
365 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
366 const struct tm* time_struct_ptr = localtime(clock);
367 if (time_struct_ptr != NULL) {
368 *res = *time_struct_ptr;
369 return res;
370 }
371 return NULL;
372 }
373
374 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo);
375
376 // Thread start routine for all new Java threads
377 static unsigned __stdcall java_start(Thread* thread) {
378 // Try to randomize the cache line index of hot stack frames.
379 // This helps when threads of the same stack traces evict each other's
380 // cache lines. The threads can be either from the same JVM instance, or
381 // from different JVM instances. The benefit is especially true for
382 // processors with hyperthreading technology.
383 static int counter = 0;
384 int pid = os::current_process_id();
385 _alloca(((pid ^ counter++) & 7) * 128);
386
387 OSThread* osthr = thread->osthread();
388 assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
389
390 if (UseNUMA) {
391 int lgrp_id = os::numa_get_group_id();
392 if (lgrp_id != -1) {
393 thread->set_lgrp_id(lgrp_id);
394 }
395 }
396
397
398 // Install a win32 structured exception handler around every thread created
399 // by VM, so VM can genrate error dump when an exception occurred in non-
400 // Java thread (e.g. VM thread).
401 __try {
402 thread->run();
403 } __except(topLevelExceptionFilter(
404 (_EXCEPTION_POINTERS*)_exception_info())) {
405 // Nothing to do.
406 }
407
408 // One less thread is executing
409 // When the VMThread gets here, the main thread may have already exited
410 // which frees the CodeHeap containing the Atomic::add code
411 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
412 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count);
413 }
414
415 return 0;
416 }
417
418 static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) {
419 // Allocate the OSThread object
420 OSThread* osthread = new OSThread(NULL, NULL);
421 if (osthread == NULL) return NULL;
422
423 // Initialize support for Java interrupts
424 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
425 if (interrupt_event == NULL) {
426 delete osthread;
427 return NULL;
428 }
429 osthread->set_interrupt_event(interrupt_event);
430
431 // Store info on the Win32 thread into the OSThread
432 osthread->set_thread_handle(thread_handle);
433 osthread->set_thread_id(thread_id);
434
435 if (UseNUMA) {
436 int lgrp_id = os::numa_get_group_id();
437 if (lgrp_id != -1) {
438 thread->set_lgrp_id(lgrp_id);
439 }
440 }
441
442 // Initial thread state is INITIALIZED, not SUSPENDED
443 osthread->set_state(INITIALIZED);
444
445 return osthread;
446 }
447
448
449 bool os::create_attached_thread(JavaThread* thread) {
450 #ifdef ASSERT
451 thread->verify_not_published();
452 #endif
453 HANDLE thread_h;
454 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(),
455 &thread_h, THREAD_ALL_ACCESS, false, 0)) {
456 fatal("DuplicateHandle failed\n");
457 }
458 OSThread* osthread = create_os_thread(thread, thread_h,
459 (int)current_thread_id());
460 if (osthread == NULL) {
461 return false;
462 }
463
464 // Initial thread state is RUNNABLE
465 osthread->set_state(RUNNABLE);
466
467 thread->set_osthread(osthread);
468 return true;
469 }
470
471 bool os::create_main_thread(JavaThread* thread) {
472 #ifdef ASSERT
473 thread->verify_not_published();
474 #endif
475 if (_starting_thread == NULL) {
476 _starting_thread = create_os_thread(thread, main_thread, main_thread_id);
477 if (_starting_thread == NULL) {
478 return false;
479 }
480 }
481
482 // The primordial thread is runnable from the start)
483 _starting_thread->set_state(RUNNABLE);
484
485 thread->set_osthread(_starting_thread);
486 return true;
487 }
488
489 // Allocate and initialize a new OSThread
490 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
491 unsigned thread_id;
492
493 // Allocate the OSThread object
494 OSThread* osthread = new OSThread(NULL, NULL);
495 if (osthread == NULL) {
496 return false;
497 }
498
499 // Initialize support for Java interrupts
500 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
501 if (interrupt_event == NULL) {
502 delete osthread;
503 return NULL;
504 }
505 osthread->set_interrupt_event(interrupt_event);
506 osthread->set_interrupted(false);
507
508 thread->set_osthread(osthread);
509
510 if (stack_size == 0) {
511 switch (thr_type) {
512 case os::java_thread:
513 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
514 if (JavaThread::stack_size_at_create() > 0)
515 stack_size = JavaThread::stack_size_at_create();
516 break;
517 case os::compiler_thread:
518 if (CompilerThreadStackSize > 0) {
519 stack_size = (size_t)(CompilerThreadStackSize * K);
520 break;
521 } // else fall through:
522 // use VMThreadStackSize if CompilerThreadStackSize is not defined
523 case os::vm_thread:
524 case os::pgc_thread:
525 case os::cgc_thread:
526 case os::watcher_thread:
527 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
528 break;
529 }
530 }
531
532 // Create the Win32 thread
533 //
534 // Contrary to what MSDN document says, "stack_size" in _beginthreadex()
535 // does not specify stack size. Instead, it specifies the size of
536 // initially committed space. The stack size is determined by
537 // PE header in the executable. If the committed "stack_size" is larger
538 // than default value in the PE header, the stack is rounded up to the
539 // nearest multiple of 1MB. For example if the launcher has default
540 // stack size of 320k, specifying any size less than 320k does not
541 // affect the actual stack size at all, it only affects the initial
542 // commitment. On the other hand, specifying 'stack_size' larger than
543 // default value may cause significant increase in memory usage, because
544 // not only the stack space will be rounded up to MB, but also the
545 // entire space is committed upfront.
546 //
547 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION'
548 // for CreateThread() that can treat 'stack_size' as stack size. However we
549 // are not supposed to call CreateThread() directly according to MSDN
550 // document because JVM uses C runtime library. The good news is that the
551 // flag appears to work with _beginthredex() as well.
552
553 #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
554 #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000)
555 #endif
556
557 HANDLE thread_handle =
558 (HANDLE)_beginthreadex(NULL,
559 (unsigned)stack_size,
560 (unsigned (__stdcall *)(void*)) java_start,
561 thread,
562 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION,
563 &thread_id);
564 if (thread_handle == NULL) {
565 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again
566 // without the flag.
567 thread_handle =
568 (HANDLE)_beginthreadex(NULL,
569 (unsigned)stack_size,
570 (unsigned (__stdcall *)(void*)) java_start,
571 thread,
572 CREATE_SUSPENDED,
573 &thread_id);
574 }
575 if (thread_handle == NULL) {
576 // Need to clean up stuff we've allocated so far
577 CloseHandle(osthread->interrupt_event());
578 thread->set_osthread(NULL);
579 delete osthread;
580 return NULL;
581 }
582
583 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count);
584
585 // Store info on the Win32 thread into the OSThread
586 osthread->set_thread_handle(thread_handle);
587 osthread->set_thread_id(thread_id);
588
589 // Initial thread state is INITIALIZED, not SUSPENDED
590 osthread->set_state(INITIALIZED);
591
592 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
593 return true;
594 }
595
596
597 // Free Win32 resources related to the OSThread
598 void os::free_thread(OSThread* osthread) {
599 assert(osthread != NULL, "osthread not set");
600 CloseHandle(osthread->thread_handle());
601 CloseHandle(osthread->interrupt_event());
602 delete osthread;
603 }
604
605
606 static int has_performance_count = 0;
607 static jlong first_filetime;
608 static jlong initial_performance_count;
609 static jlong performance_frequency;
610
611
612 jlong as_long(LARGE_INTEGER x) {
613 jlong result = 0; // initialization to avoid warning
614 set_high(&result, x.HighPart);
615 set_low(&result, x.LowPart);
616 return result;
617 }
618
619
620 jlong os::elapsed_counter() {
621 LARGE_INTEGER count;
622 if (has_performance_count) {
623 QueryPerformanceCounter(&count);
624 return as_long(count) - initial_performance_count;
625 } else {
626 FILETIME wt;
627 GetSystemTimeAsFileTime(&wt);
628 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime);
629 }
630 }
631
632
633 jlong os::elapsed_frequency() {
634 if (has_performance_count) {
635 return performance_frequency;
636 } else {
637 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
638 return 10000000;
639 }
640 }
641
642
643 julong os::available_memory() {
644 return win32::available_memory();
645 }
646
647 julong os::win32::available_memory() {
648 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
649 // value if total memory is larger than 4GB
650 MEMORYSTATUSEX ms;
651 ms.dwLength = sizeof(ms);
652 GlobalMemoryStatusEx(&ms);
653
654 return (julong)ms.ullAvailPhys;
655 }
656
657 julong os::physical_memory() {
658 return win32::physical_memory();
659 }
660
661 julong os::allocatable_physical_memory(julong size) {
662 #ifdef _LP64
663 return size;
664 #else
665 // Limit to 1400m because of the 2gb address space wall
666 return MIN2(size, (julong)1400*M);
667 #endif
668 }
669
670 // VC6 lacks DWORD_PTR
671 #if _MSC_VER < 1300
672 typedef UINT_PTR DWORD_PTR;
673 #endif
674
675 int os::active_processor_count() {
676 DWORD_PTR lpProcessAffinityMask = 0;
677 DWORD_PTR lpSystemAffinityMask = 0;
678 int proc_count = processor_count();
679 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
680 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {
681 // Nof active processors is number of bits in process affinity mask
682 int bitcount = 0;
683 while (lpProcessAffinityMask != 0) {
684 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1);
685 bitcount++;
686 }
687 return bitcount;
688 } else {
689 return proc_count;
690 }
691 }
692
693 void os::set_native_thread_name(const char *name) {
694 // Not yet implemented.
695 return;
696 }
697
698 bool os::distribute_processes(uint length, uint* distribution) {
699 // Not yet implemented.
700 return false;
701 }
702
703 bool os::bind_to_processor(uint processor_id) {
704 // Not yet implemented.
705 return false;
706 }
707
708 static void initialize_performance_counter() {
709 LARGE_INTEGER count;
710 if (QueryPerformanceFrequency(&count)) {
711 has_performance_count = 1;
712 performance_frequency = as_long(count);
713 QueryPerformanceCounter(&count);
714 initial_performance_count = as_long(count);
715 } else {
716 has_performance_count = 0;
717 FILETIME wt;
718 GetSystemTimeAsFileTime(&wt);
719 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
720 }
721 }
722
723
724 double os::elapsedTime() {
725 return (double) elapsed_counter() / (double) elapsed_frequency();
726 }
727
728
729 // Windows format:
730 // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
731 // Java format:
732 // Java standards require the number of milliseconds since 1/1/1970
733
734 // Constant offset - calculated using offset()
735 static jlong _offset = 116444736000000000;
736 // Fake time counter for reproducible results when debugging
737 static jlong fake_time = 0;
738
739 #ifdef ASSERT
740 // Just to be safe, recalculate the offset in debug mode
741 static jlong _calculated_offset = 0;
742 static int _has_calculated_offset = 0;
743
744 jlong offset() {
745 if (_has_calculated_offset) return _calculated_offset;
746 SYSTEMTIME java_origin;
747 java_origin.wYear = 1970;
748 java_origin.wMonth = 1;
749 java_origin.wDayOfWeek = 0; // ignored
750 java_origin.wDay = 1;
751 java_origin.wHour = 0;
752 java_origin.wMinute = 0;
753 java_origin.wSecond = 0;
754 java_origin.wMilliseconds = 0;
755 FILETIME jot;
756 if (!SystemTimeToFileTime(&java_origin, &jot)) {
757 fatal(err_msg("Error = %d\nWindows error", GetLastError()));
758 }
759 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime);
760 _has_calculated_offset = 1;
761 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal");
762 return _calculated_offset;
763 }
764 #else
765 jlong offset() {
766 return _offset;
767 }
768 #endif
769
770 jlong windows_to_java_time(FILETIME wt) {
771 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
772 return (a - offset()) / 10000;
773 }
774
775 FILETIME java_to_windows_time(jlong l) {
776 jlong a = (l * 10000) + offset();
777 FILETIME result;
778 result.dwHighDateTime = high(a);
779 result.dwLowDateTime = low(a);
780 return result;
781 }
782
783 // For now, we say that Windows does not support vtime. I have no idea
784 // whether it can actually be made to (DLD, 9/13/05).
785
786 bool os::supports_vtime() { return false; }
787 bool os::enable_vtime() { return false; }
788 bool os::vtime_enabled() { return false; }
789 double os::elapsedVTime() {
790 // better than nothing, but not much
791 return elapsedTime();
792 }
793
794 jlong os::javaTimeMillis() {
795 if (UseFakeTimers) {
796 return fake_time++;
797 } else {
798 FILETIME wt;
799 GetSystemTimeAsFileTime(&wt);
800 return windows_to_java_time(wt);
801 }
802 }
803
804 jlong os::javaTimeNanos() {
805 if (!has_performance_count) {
806 return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do.
807 } else {
808 LARGE_INTEGER current_count;
809 QueryPerformanceCounter(¤t_count);
810 double current = as_long(current_count);
811 double freq = performance_frequency;
812 jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC);
813 return time;
814 }
815 }
816
817 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
818 if (!has_performance_count) {
819 // javaTimeMillis() doesn't have much percision,
820 // but it is not going to wrap -- so all 64 bits
821 info_ptr->max_value = ALL_64_BITS;
822
823 // this is a wall clock timer, so may skip
824 info_ptr->may_skip_backward = true;
825 info_ptr->may_skip_forward = true;
826 } else {
827 jlong freq = performance_frequency;
828 if (freq < NANOSECS_PER_SEC) {
829 // the performance counter is 64 bits and we will
830 // be multiplying it -- so no wrap in 64 bits
831 info_ptr->max_value = ALL_64_BITS;
832 } else if (freq > NANOSECS_PER_SEC) {
833 // use the max value the counter can reach to
834 // determine the max value which could be returned
835 julong max_counter = (julong)ALL_64_BITS;
836 info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC));
837 } else {
838 // the performance counter is 64 bits and we will
839 // be using it directly -- so no wrap in 64 bits
840 info_ptr->max_value = ALL_64_BITS;
841 }
842
843 // using a counter, so no skipping
844 info_ptr->may_skip_backward = false;
845 info_ptr->may_skip_forward = false;
846 }
847 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
848 }
849
850 char* os::local_time_string(char *buf, size_t buflen) {
851 SYSTEMTIME st;
852 GetLocalTime(&st);
853 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
854 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
855 return buf;
856 }
857
858 bool os::getTimesSecs(double* process_real_time,
859 double* process_user_time,
860 double* process_system_time) {
861 HANDLE h_process = GetCurrentProcess();
862 FILETIME create_time, exit_time, kernel_time, user_time;
863 BOOL result = GetProcessTimes(h_process,
864 &create_time,
865 &exit_time,
866 &kernel_time,
867 &user_time);
868 if (result != 0) {
869 FILETIME wt;
870 GetSystemTimeAsFileTime(&wt);
871 jlong rtc_millis = windows_to_java_time(wt);
872 jlong user_millis = windows_to_java_time(user_time);
873 jlong system_millis = windows_to_java_time(kernel_time);
874 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS);
875 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS);
876 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS);
877 return true;
878 } else {
879 return false;
880 }
881 }
882
883 void os::shutdown() {
884
885 // allow PerfMemory to attempt cleanup of any persistent resources
886 perfMemory_exit();
887
888 // flush buffered output, finish log files
889 ostream_abort();
890
891 // Check for abort hook
892 abort_hook_t abort_hook = Arguments::abort_hook();
893 if (abort_hook != NULL) {
894 abort_hook();
895 }
896 }
897
898
899 static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
900 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION);
901
902 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
903 HINSTANCE dbghelp;
904 EXCEPTION_POINTERS ep;
905 MINIDUMP_EXCEPTION_INFORMATION mei;
906 MINIDUMP_EXCEPTION_INFORMATION* pmei;
907
908 HANDLE hProcess = GetCurrentProcess();
909 DWORD processId = GetCurrentProcessId();
910 HANDLE dumpFile;
911 MINIDUMP_TYPE dumpType;
912 static const char* cwd;
913
914 // If running on a client version of Windows and user has not explicitly enabled dumping
915 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) {
916 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false);
917 return;
918 // If running on a server version of Windows and user has explictly disabled dumping
919 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) {
920 VMError::report_coredump_status("Minidump has been disabled from the command line", false);
921 return;
922 }
923
924 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0);
925
926 if (dbghelp == NULL) {
927 VMError::report_coredump_status("Failed to load dbghelp.dll", false);
928 return;
929 }
930
931 _MiniDumpWriteDump = CAST_TO_FN_PTR(
932 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
933 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION),
934 GetProcAddress(dbghelp, "MiniDumpWriteDump"));
935
936 if (_MiniDumpWriteDump == NULL) {
937 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false);
938 return;
939 }
940
941 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData);
942
943 // Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with
944 // API_VERSION_NUMBER 11 or higher contains the ones we want though
945 #if API_VERSION_NUMBER >= 11
946 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo |
947 MiniDumpWithUnloadedModules);
948 #endif
949
950 cwd = get_current_directory(NULL, 0);
951 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id());
952 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
953
954 if (dumpFile == INVALID_HANDLE_VALUE) {
955 VMError::report_coredump_status("Failed to create file for dumping", false);
956 return;
957 }
958 if (exceptionRecord != NULL && contextRecord != NULL) {
959 ep.ContextRecord = (PCONTEXT) contextRecord;
960 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord;
961
962 mei.ThreadId = GetCurrentThreadId();
963 mei.ExceptionPointers = &ep;
964 pmei = &mei;
965 } else {
966 pmei = NULL;
967 }
968
969
970 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all
971 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then.
972 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false &&
973 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) {
974 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false);
975 } else {
976 VMError::report_coredump_status(buffer, true);
977 }
978
979 CloseHandle(dumpFile);
980 }
981
982
983
984 void os::abort(bool dump_core)
985 {
986 os::shutdown();
987 // no core dump on Windows
988 ::exit(1);
989 }
990
991 // Die immediately, no exit hook, no abort hook, no cleanup.
992 void os::die() {
993 _exit(-1);
994 }
995
996 // Directory routines copied from src/win32/native/java/io/dirent_md.c
997 // * dirent_md.c 1.15 00/02/02
998 //
999 // The declarations for DIR and struct dirent are in jvm_win32.h.
1000
1001 /* Caller must have already run dirname through JVM_NativePath, which removes
1002 duplicate slashes and converts all instances of '/' into '\\'. */
1003
1004 DIR *
1005 os::opendir(const char *dirname)
1006 {
1007 assert(dirname != NULL, "just checking"); // hotspot change
1008 DIR *dirp = (DIR *)malloc(sizeof(DIR), mtInternal);
1009 DWORD fattr; // hotspot change
1010 char alt_dirname[4] = { 0, 0, 0, 0 };
1011
1012 if (dirp == 0) {
1013 errno = ENOMEM;
1014 return 0;
1015 }
1016
1017 /*
1018 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it
1019 * as a directory in FindFirstFile(). We detect this case here and
1020 * prepend the current drive name.
1021 */
1022 if (dirname[1] == '\0' && dirname[0] == '\\') {
1023 alt_dirname[0] = _getdrive() + 'A' - 1;
1024 alt_dirname[1] = ':';
1025 alt_dirname[2] = '\\';
1026 alt_dirname[3] = '\0';
1027 dirname = alt_dirname;
1028 }
1029
1030 dirp->path = (char *)malloc(strlen(dirname) + 5, mtInternal);
1031 if (dirp->path == 0) {
1032 free(dirp, mtInternal);
1033 errno = ENOMEM;
1034 return 0;
1035 }
1036 strcpy(dirp->path, dirname);
1037
1038 fattr = GetFileAttributes(dirp->path);
1039 if (fattr == 0xffffffff) {
1040 free(dirp->path, mtInternal);
1041 free(dirp, mtInternal);
1042 errno = ENOENT;
1043 return 0;
1044 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
1045 free(dirp->path, mtInternal);
1046 free(dirp, mtInternal);
1047 errno = ENOTDIR;
1048 return 0;
1049 }
1050
1051 /* Append "*.*", or possibly "\\*.*", to path */
1052 if (dirp->path[1] == ':'
1053 && (dirp->path[2] == '\0'
1054 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) {
1055 /* No '\\' needed for cases like "Z:" or "Z:\" */
1056 strcat(dirp->path, "*.*");
1057 } else {
1058 strcat(dirp->path, "\\*.*");
1059 }
1060
1061 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data);
1062 if (dirp->handle == INVALID_HANDLE_VALUE) {
1063 if (GetLastError() != ERROR_FILE_NOT_FOUND) {
1064 free(dirp->path, mtInternal);
1065 free(dirp, mtInternal);
1066 errno = EACCES;
1067 return 0;
1068 }
1069 }
1070 return dirp;
1071 }
1072
1073 /* parameter dbuf unused on Windows */
1074
1075 struct dirent *
1076 os::readdir(DIR *dirp, dirent *dbuf)
1077 {
1078 assert(dirp != NULL, "just checking"); // hotspot change
1079 if (dirp->handle == INVALID_HANDLE_VALUE) {
1080 return 0;
1081 }
1082
1083 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName);
1084
1085 if (!FindNextFile(dirp->handle, &dirp->find_data)) {
1086 if (GetLastError() == ERROR_INVALID_HANDLE) {
1087 errno = EBADF;
1088 return 0;
1089 }
1090 FindClose(dirp->handle);
1091 dirp->handle = INVALID_HANDLE_VALUE;
1092 }
1093
1094 return &dirp->dirent;
1095 }
1096
1097 int
1098 os::closedir(DIR *dirp)
1099 {
1100 assert(dirp != NULL, "just checking"); // hotspot change
1101 if (dirp->handle != INVALID_HANDLE_VALUE) {
1102 if (!FindClose(dirp->handle)) {
1103 errno = EBADF;
1104 return -1;
1105 }
1106 dirp->handle = INVALID_HANDLE_VALUE;
1107 }
1108 free(dirp->path, mtInternal);
1109 free(dirp, mtInternal);
1110 return 0;
1111 }
1112
1113 // This must be hard coded because it's the system's temporary
1114 // directory not the java application's temp directory, ala java.io.tmpdir.
1115 const char* os::get_temp_directory() {
1116 static char path_buf[MAX_PATH];
1117 if (GetTempPath(MAX_PATH, path_buf)>0)
1118 return path_buf;
1119 else{
1120 path_buf[0]='\0';
1121 return path_buf;
1122 }
1123 }
1124
1125 static bool file_exists(const char* filename) {
1126 if (filename == NULL || strlen(filename) == 0) {
1127 return false;
1128 }
1129 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES;
1130 }
1131
1132 bool os::dll_build_name(char *buffer, size_t buflen,
1133 const char* pname, const char* fname) {
1134 bool retval = false;
1135 const size_t pnamelen = pname ? strlen(pname) : 0;
1136 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0;
1137
1138 // Return error on buffer overflow.
1139 if (pnamelen + strlen(fname) + 10 > buflen) {
1140 return retval;
1141 }
1142
1143 if (pnamelen == 0) {
1144 jio_snprintf(buffer, buflen, "%s.dll", fname);
1145 retval = true;
1146 } else if (c == ':' || c == '\\') {
1147 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname);
1148 retval = true;
1149 } else if (strchr(pname, *os::path_separator()) != NULL) {
1150 int n;
1151 char** pelements = split_path(pname, &n);
1152 for (int i = 0 ; i < n ; i++) {
1153 char* path = pelements[i];
1154 // Really shouldn't be NULL, but check can't hurt
1155 size_t plen = (path == NULL) ? 0 : strlen(path);
1156 if (plen == 0) {
1157 continue; // skip the empty path values
1158 }
1159 const char lastchar = path[plen - 1];
1160 if (lastchar == ':' || lastchar == '\\') {
1161 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname);
1162 } else {
1163 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname);
1164 }
1165 if (file_exists(buffer)) {
1166 retval = true;
1167 break;
1168 }
1169 }
1170 // release the storage
1171 for (int i = 0 ; i < n ; i++) {
1172 if (pelements[i] != NULL) {
1173 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
1174 }
1175 }
1176 if (pelements != NULL) {
1177 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
1178 }
1179 } else {
1180 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname);
1181 retval = true;
1182 }
1183 return retval;
1184 }
1185
1186 // Needs to be in os specific directory because windows requires another
1187 // header file <direct.h>
1188 const char* os::get_current_directory(char *buf, int buflen) {
1189 return _getcwd(buf, buflen);
1190 }
1191
1192 //-----------------------------------------------------------
1193 // Helper functions for fatal error handler
1194 #ifdef _WIN64
1195 // Helper routine which returns true if address in
1196 // within the NTDLL address space.
1197 //
1198 static bool _addr_in_ntdll( address addr )
1199 {
1200 HMODULE hmod;
1201 MODULEINFO minfo;
1202
1203 hmod = GetModuleHandle("NTDLL.DLL");
1204 if ( hmod == NULL ) return false;
1205 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod,
1206 &minfo, sizeof(MODULEINFO)) )
1207 return false;
1208
1209 if ( (addr >= minfo.lpBaseOfDll) &&
1210 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage)))
1211 return true;
1212 else
1213 return false;
1214 }
1215 #endif
1216
1217
1218 // Enumerate all modules for a given process ID
1219 //
1220 // Notice that Windows 95/98/Me and Windows NT/2000/XP have
1221 // different API for doing this. We use PSAPI.DLL on NT based
1222 // Windows and ToolHelp on 95/98/Me.
1223
1224 // Callback function that is called by enumerate_modules() on
1225 // every DLL module.
1226 // Input parameters:
1227 // int pid,
1228 // char* module_file_name,
1229 // address module_base_addr,
1230 // unsigned module_size,
1231 // void* param
1232 typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *);
1233
1234 // enumerate_modules for Windows NT, using PSAPI
1235 static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param)
1236 {
1237 HANDLE hProcess ;
1238
1239 # define MAX_NUM_MODULES 128
1240 HMODULE modules[MAX_NUM_MODULES];
1241 static char filename[ MAX_PATH ];
1242 int result = 0;
1243
1244 if (!os::PSApiDll::PSApiAvailable()) {
1245 return 0;
1246 }
1247
1248 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
1249 FALSE, pid ) ;
1250 if (hProcess == NULL) return 0;
1251
1252 DWORD size_needed;
1253 if (!os::PSApiDll::EnumProcessModules(hProcess, modules,
1254 sizeof(modules), &size_needed)) {
1255 CloseHandle( hProcess );
1256 return 0;
1257 }
1258
1259 // number of modules that are currently loaded
1260 int num_modules = size_needed / sizeof(HMODULE);
1261
1262 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) {
1263 // Get Full pathname:
1264 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i],
1265 filename, sizeof(filename))) {
1266 filename[0] = '\0';
1267 }
1268
1269 MODULEINFO modinfo;
1270 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i],
1271 &modinfo, sizeof(modinfo))) {
1272 modinfo.lpBaseOfDll = NULL;
1273 modinfo.SizeOfImage = 0;
1274 }
1275
1276 // Invoke callback function
1277 result = func(pid, filename, (address)modinfo.lpBaseOfDll,
1278 modinfo.SizeOfImage, param);
1279 if (result) break;
1280 }
1281
1282 CloseHandle( hProcess ) ;
1283 return result;
1284 }
1285
1286
1287 // enumerate_modules for Windows 95/98/ME, using TOOLHELP
1288 static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param)
1289 {
1290 HANDLE hSnapShot ;
1291 static MODULEENTRY32 modentry ;
1292 int result = 0;
1293
1294 if (!os::Kernel32Dll::HelpToolsAvailable()) {
1295 return 0;
1296 }
1297
1298 // Get a handle to a Toolhelp snapshot of the system
1299 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ;
1300 if( hSnapShot == INVALID_HANDLE_VALUE ) {
1301 return FALSE ;
1302 }
1303
1304 // iterate through all modules
1305 modentry.dwSize = sizeof(MODULEENTRY32) ;
1306 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0;
1307
1308 while( not_done ) {
1309 // invoke the callback
1310 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr,
1311 modentry.modBaseSize, param);
1312 if (result) break;
1313
1314 modentry.dwSize = sizeof(MODULEENTRY32) ;
1315 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0;
1316 }
1317
1318 CloseHandle(hSnapShot);
1319 return result;
1320 }
1321
1322 int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param )
1323 {
1324 // Get current process ID if caller doesn't provide it.
1325 if (!pid) pid = os::current_process_id();
1326
1327 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param);
1328 else return _enumerate_modules_windows(pid, func, param);
1329 }
1330
1331 struct _modinfo {
1332 address addr;
1333 char* full_path; // point to a char buffer
1334 int buflen; // size of the buffer
1335 address base_addr;
1336 };
1337
1338 static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr,
1339 unsigned size, void * param) {
1340 struct _modinfo *pmod = (struct _modinfo *)param;
1341 if (!pmod) return -1;
1342
1343 if (base_addr <= pmod->addr &&
1344 base_addr+size > pmod->addr) {
1345 // if a buffer is provided, copy path name to the buffer
1346 if (pmod->full_path) {
1347 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname);
1348 }
1349 pmod->base_addr = base_addr;
1350 return 1;
1351 }
1352 return 0;
1353 }
1354
1355 bool os::dll_address_to_library_name(address addr, char* buf,
1356 int buflen, int* offset) {
1357 // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
1358 // return the full path to the DLL file, sometimes it returns path
1359 // to the corresponding PDB file (debug info); sometimes it only
1360 // returns partial path, which makes life painful.
1361
1362 struct _modinfo mi;
1363 mi.addr = addr;
1364 mi.full_path = buf;
1365 mi.buflen = buflen;
1366 int pid = os::current_process_id();
1367 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
1368 // buf already contains path name
1369 if (offset) *offset = addr - mi.base_addr;
1370 return true;
1371 } else {
1372 if (buf) buf[0] = '\0';
1373 if (offset) *offset = -1;
1374 return false;
1375 }
1376 }
1377
1378 bool os::dll_address_to_function_name(address addr, char *buf,
1379 int buflen, int *offset) {
1380 if (Decoder::decode(addr, buf, buflen, offset)) {
1381 return true;
1382 }
1383 if (offset != NULL) *offset = -1;
1384 if (buf != NULL) buf[0] = '\0';
1385 return false;
1386 }
1387
1388 // save the start and end address of jvm.dll into param[0] and param[1]
1389 static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr,
1390 unsigned size, void * param) {
1391 if (!param) return -1;
1392
1393 if (base_addr <= (address)_locate_jvm_dll &&
1394 base_addr+size > (address)_locate_jvm_dll) {
1395 ((address*)param)[0] = base_addr;
1396 ((address*)param)[1] = base_addr + size;
1397 return 1;
1398 }
1399 return 0;
1400 }
1401
1402 address vm_lib_location[2]; // start and end address of jvm.dll
1403
1404 // check if addr is inside jvm.dll
1405 bool os::address_is_in_vm(address addr) {
1406 if (!vm_lib_location[0] || !vm_lib_location[1]) {
1407 int pid = os::current_process_id();
1408 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) {
1409 assert(false, "Can't find jvm module.");
1410 return false;
1411 }
1412 }
1413
1414 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]);
1415 }
1416
1417 // print module info; param is outputStream*
1418 static int _print_module(int pid, char* fname, address base,
1419 unsigned size, void* param) {
1420 if (!param) return -1;
1421
1422 outputStream* st = (outputStream*)param;
1423
1424 address end_addr = base + size;
1425 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname);
1426 return 0;
1427 }
1428
1429 // Loads .dll/.so and
1430 // in case of error it checks if .dll/.so was built for the
1431 // same architecture as Hotspot is running on
1432 void * os::dll_load(const char *name, char *ebuf, int ebuflen)
1433 {
1434 void * result = LoadLibrary(name);
1435 if (result != NULL)
1436 {
1437 return result;
1438 }
1439
1440 DWORD errcode = GetLastError();
1441 if (errcode == ERROR_MOD_NOT_FOUND) {
1442 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
1443 ebuf[ebuflen-1]='\0';
1444 return NULL;
1445 }
1446
1447 // Parsing dll below
1448 // If we can read dll-info and find that dll was built
1449 // for an architecture other than Hotspot is running in
1450 // - then print to buffer "DLL was built for a different architecture"
1451 // else call os::lasterror to obtain system error message
1452
1453 // Read system error message into ebuf
1454 // It may or may not be overwritten below (in the for loop and just above)
1455 lasterror(ebuf, (size_t) ebuflen);
1456 ebuf[ebuflen-1]='\0';
1457 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0);
1458 if (file_descriptor<0)
1459 {
1460 return NULL;
1461 }
1462
1463 uint32_t signature_offset;
1464 uint16_t lib_arch=0;
1465 bool failed_to_get_lib_arch=
1466 (
1467 //Go to position 3c in the dll
1468 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0)
1469 ||
1470 // Read loacation of signature
1471 (sizeof(signature_offset)!=
1472 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset))))
1473 ||
1474 //Go to COFF File Header in dll
1475 //that is located after"signature" (4 bytes long)
1476 (os::seek_to_file_offset(file_descriptor,
1477 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0)
1478 ||
1479 //Read field that contains code of architecture
1480 // that dll was build for
1481 (sizeof(lib_arch)!=
1482 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch))))
1483 );
1484
1485 ::close(file_descriptor);
1486 if (failed_to_get_lib_arch)
1487 {
1488 // file i/o error - report os::lasterror(...) msg
1489 return NULL;
1490 }
1491
1492 typedef struct
1493 {
1494 uint16_t arch_code;
1495 char* arch_name;
1496 } arch_t;
1497
1498 static const arch_t arch_array[]={
1499 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"},
1500 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"},
1501 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"}
1502 };
1503 #if (defined _M_IA64)
1504 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64;
1505 #elif (defined _M_AMD64)
1506 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64;
1507 #elif (defined _M_IX86)
1508 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386;
1509 #else
1510 #error Method os::dll_load requires that one of following \
1511 is defined :_M_IA64,_M_AMD64 or _M_IX86
1512 #endif
1513
1514
1515 // Obtain a string for printf operation
1516 // lib_arch_str shall contain string what platform this .dll was built for
1517 // running_arch_str shall string contain what platform Hotspot was built for
1518 char *running_arch_str=NULL,*lib_arch_str=NULL;
1519 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++)
1520 {
1521 if (lib_arch==arch_array[i].arch_code)
1522 lib_arch_str=arch_array[i].arch_name;
1523 if (running_arch==arch_array[i].arch_code)
1524 running_arch_str=arch_array[i].arch_name;
1525 }
1526
1527 assert(running_arch_str,
1528 "Didn't find runing architecture code in arch_array");
1529
1530 // If the architure is right
1531 // but some other error took place - report os::lasterror(...) msg
1532 if (lib_arch == running_arch)
1533 {
1534 return NULL;
1535 }
1536
1537 if (lib_arch_str!=NULL)
1538 {
1539 ::_snprintf(ebuf, ebuflen-1,
1540 "Can't load %s-bit .dll on a %s-bit platform",
1541 lib_arch_str,running_arch_str);
1542 }
1543 else
1544 {
1545 // don't know what architecture this dll was build for
1546 ::_snprintf(ebuf, ebuflen-1,
1547 "Can't load this .dll (machine code=0x%x) on a %s-bit platform",
1548 lib_arch,running_arch_str);
1549 }
1550
1551 return NULL;
1552 }
1553
1554
1555 void os::print_dll_info(outputStream *st) {
1556 int pid = os::current_process_id();
1557 st->print_cr("Dynamic libraries:");
1558 enumerate_modules(pid, _print_module, (void *)st);
1559 }
1560
1561 void os::print_os_info_brief(outputStream* st) {
1562 os::print_os_info(st);
1563 }
1564
1565 void os::print_os_info(outputStream* st) {
1566 st->print("OS:");
1567
1568 os::win32::print_windows_version(st);
1569 }
1570
1571 void os::win32::print_windows_version(outputStream* st) {
1572 OSVERSIONINFOEX osvi;
1573 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
1574 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
1575
1576 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) {
1577 st->print_cr("N/A");
1578 return;
1579 }
1580
1581 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
1582 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
1583 switch (os_vers) {
1584 case 3051: st->print(" Windows NT 3.51"); break;
1585 case 4000: st->print(" Windows NT 4.0"); break;
1586 case 5000: st->print(" Windows 2000"); break;
1587 case 5001: st->print(" Windows XP"); break;
1588 case 5002:
1589 case 6000:
1590 case 6001:
1591 case 6002: {
1592 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
1593 // find out whether we are running on 64 bit processor or not.
1594 SYSTEM_INFO si;
1595 ZeroMemory(&si, sizeof(SYSTEM_INFO));
1596 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){
1597 GetSystemInfo(&si);
1598 } else {
1599 os::Kernel32Dll::GetNativeSystemInfo(&si);
1600 }
1601 if (os_vers == 5002) {
1602 if (osvi.wProductType == VER_NT_WORKSTATION &&
1603 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1604 st->print(" Windows XP x64 Edition");
1605 else
1606 st->print(" Windows Server 2003 family");
1607 } else if (os_vers == 6000) {
1608 if (osvi.wProductType == VER_NT_WORKSTATION)
1609 st->print(" Windows Vista");
1610 else
1611 st->print(" Windows Server 2008");
1612 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1613 st->print(" , 64 bit");
1614 } else if (os_vers == 6001) {
1615 if (osvi.wProductType == VER_NT_WORKSTATION) {
1616 st->print(" Windows 7");
1617 } else {
1618 // Unrecognized windows, print out its major and minor versions
1619 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1620 }
1621 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1622 st->print(" , 64 bit");
1623 } else if (os_vers == 6002) {
1624 if (osvi.wProductType == VER_NT_WORKSTATION) {
1625 st->print(" Windows 8");
1626 } else {
1627 st->print(" Windows Server 2012");
1628 }
1629 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1630 st->print(" , 64 bit");
1631 } else { // future os
1632 // Unrecognized windows, print out its major and minor versions
1633 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1634 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
1635 st->print(" , 64 bit");
1636 }
1637 break;
1638 }
1639 default: // future windows, print out its major and minor versions
1640 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1641 }
1642 } else {
1643 switch (os_vers) {
1644 case 4000: st->print(" Windows 95"); break;
1645 case 4010: st->print(" Windows 98"); break;
1646 case 4090: st->print(" Windows Me"); break;
1647 default: // future windows, print out its major and minor versions
1648 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
1649 }
1650 }
1651 st->print(" Build %d", osvi.dwBuildNumber);
1652 st->print(" %s", osvi.szCSDVersion); // service pack
1653 st->cr();
1654 }
1655
1656 void os::pd_print_cpu_info(outputStream* st) {
1657 // Nothing to do for now.
1658 }
1659
1660 void os::print_memory_info(outputStream* st) {
1661 st->print("Memory:");
1662 st->print(" %dk page", os::vm_page_size()>>10);
1663
1664 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
1665 // value if total memory is larger than 4GB
1666 MEMORYSTATUSEX ms;
1667 ms.dwLength = sizeof(ms);
1668 GlobalMemoryStatusEx(&ms);
1669
1670 st->print(", physical %uk", os::physical_memory() >> 10);
1671 st->print("(%uk free)", os::available_memory() >> 10);
1672
1673 st->print(", swap %uk", ms.ullTotalPageFile >> 10);
1674 st->print("(%uk free)", ms.ullAvailPageFile >> 10);
1675 st->cr();
1676 }
1677
1678 void os::print_siginfo(outputStream *st, void *siginfo) {
1679 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo;
1680 st->print("siginfo:");
1681 st->print(" ExceptionCode=0x%x", er->ExceptionCode);
1682
1683 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
1684 er->NumberParameters >= 2) {
1685 switch (er->ExceptionInformation[0]) {
1686 case 0: st->print(", reading address"); break;
1687 case 1: st->print(", writing address"); break;
1688 default: st->print(", ExceptionInformation=" INTPTR_FORMAT,
1689 er->ExceptionInformation[0]);
1690 }
1691 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]);
1692 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR &&
1693 er->NumberParameters >= 2 && UseSharedSpaces) {
1694 FileMapInfo* mapinfo = FileMapInfo::current_info();
1695 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) {
1696 st->print("\n\nError accessing class data sharing archive." \
1697 " Mapped file inaccessible during execution, " \
1698 " possible disk/network problem.");
1699 }
1700 } else {
1701 int num = er->NumberParameters;
1702 if (num > 0) {
1703 st->print(", ExceptionInformation=");
1704 for (int i = 0; i < num; i++) {
1705 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]);
1706 }
1707 }
1708 }
1709 st->cr();
1710 }
1711
1712 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
1713 // do nothing
1714 }
1715
1716 static char saved_jvm_path[MAX_PATH] = {0};
1717
1718 // Find the full path to the current module, jvm.dll or jvm_g.dll
1719 void os::jvm_path(char *buf, jint buflen) {
1720 // Error checking.
1721 if (buflen < MAX_PATH) {
1722 assert(false, "must use a large-enough buffer");
1723 buf[0] = '\0';
1724 return;
1725 }
1726 // Lazy resolve the path to current module.
1727 if (saved_jvm_path[0] != 0) {
1728 strcpy(buf, saved_jvm_path);
1729 return;
1730 }
1731
1732 buf[0] = '\0';
1733 if (Arguments::created_by_gamma_launcher()) {
1734 // Support for the gamma launcher. Check for an
1735 // JAVA_HOME environment variable
1736 // and fix up the path so it looks like
1737 // libjvm.so is installed there (append a fake suffix
1738 // hotspot/libjvm.so).
1739 char* java_home_var = ::getenv("JAVA_HOME");
1740 if (java_home_var != NULL && java_home_var[0] != 0) {
1741
1742 strncpy(buf, java_home_var, buflen);
1743
1744 // determine if this is a legacy image or modules image
1745 // modules image doesn't have "jre" subdirectory
1746 size_t len = strlen(buf);
1747 char* jrebin_p = buf + len;
1748 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\");
1749 if (0 != _access(buf, 0)) {
1750 jio_snprintf(jrebin_p, buflen-len, "\\bin\\");
1751 }
1752 len = strlen(buf);
1753 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll");
1754 }
1755 }
1756
1757 if(buf[0] == '\0') {
1758 GetModuleFileName(vm_lib_handle, buf, buflen);
1759 }
1760 strcpy(saved_jvm_path, buf);
1761 }
1762
1763
1764 void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
1765 #ifndef _WIN64
1766 st->print("_");
1767 #endif
1768 }
1769
1770
1771 void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
1772 #ifndef _WIN64
1773 st->print("@%d", args_size * sizeof(int));
1774 #endif
1775 }
1776
1777 // This method is a copy of JDK's sysGetLastErrorString
1778 // from src/windows/hpi/src/system_md.c
1779
1780 size_t os::lasterror(char* buf, size_t len) {
1781 DWORD errval;
1782
1783 if ((errval = GetLastError()) != 0) {
1784 // DOS error
1785 size_t n = (size_t)FormatMessage(
1786 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
1787 NULL,
1788 errval,
1789 0,
1790 buf,
1791 (DWORD)len,
1792 NULL);
1793 if (n > 3) {
1794 // Drop final '.', CR, LF
1795 if (buf[n - 1] == '\n') n--;
1796 if (buf[n - 1] == '\r') n--;
1797 if (buf[n - 1] == '.') n--;
1798 buf[n] = '\0';
1799 }
1800 return n;
1801 }
1802
1803 if (errno != 0) {
1804 // C runtime error that has no corresponding DOS error code
1805 const char* s = strerror(errno);
1806 size_t n = strlen(s);
1807 if (n >= len) n = len - 1;
1808 strncpy(buf, s, n);
1809 buf[n] = '\0';
1810 return n;
1811 }
1812
1813 return 0;
1814 }
1815
1816 int os::get_last_error() {
1817 DWORD error = GetLastError();
1818 if (error == 0)
1819 error = errno;
1820 return (int)error;
1821 }
1822
1823 // sun.misc.Signal
1824 // NOTE that this is a workaround for an apparent kernel bug where if
1825 // a signal handler for SIGBREAK is installed then that signal handler
1826 // takes priority over the console control handler for CTRL_CLOSE_EVENT.
1827 // See bug 4416763.
1828 static void (*sigbreakHandler)(int) = NULL;
1829
1830 static void UserHandler(int sig, void *siginfo, void *context) {
1831 os::signal_notify(sig);
1832 // We need to reinstate the signal handler each time...
1833 os::signal(sig, (void*)UserHandler);
1834 }
1835
1836 void* os::user_handler() {
1837 return (void*) UserHandler;
1838 }
1839
1840 void* os::signal(int signal_number, void* handler) {
1841 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) {
1842 void (*oldHandler)(int) = sigbreakHandler;
1843 sigbreakHandler = (void (*)(int)) handler;
1844 return (void*) oldHandler;
1845 } else {
1846 return (void*)::signal(signal_number, (void (*)(int))handler);
1847 }
1848 }
1849
1850 void os::signal_raise(int signal_number) {
1851 raise(signal_number);
1852 }
1853
1854 // The Win32 C runtime library maps all console control events other than ^C
1855 // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close,
1856 // logoff, and shutdown events. We therefore install our own console handler
1857 // that raises SIGTERM for the latter cases.
1858 //
1859 static BOOL WINAPI consoleHandler(DWORD event) {
1860 switch(event) {
1861 case CTRL_C_EVENT:
1862 if (is_error_reported()) {
1863 // Ctrl-C is pressed during error reporting, likely because the error
1864 // handler fails to abort. Let VM die immediately.
1865 os::die();
1866 }
1867
1868 os::signal_raise(SIGINT);
1869 return TRUE;
1870 break;
1871 case CTRL_BREAK_EVENT:
1872 if (sigbreakHandler != NULL) {
1873 (*sigbreakHandler)(SIGBREAK);
1874 }
1875 return TRUE;
1876 break;
1877 case CTRL_CLOSE_EVENT:
1878 case CTRL_LOGOFF_EVENT:
1879 case CTRL_SHUTDOWN_EVENT:
1880 os::signal_raise(SIGTERM);
1881 return TRUE;
1882 break;
1883 default:
1884 break;
1885 }
1886 return FALSE;
1887 }
1888
1889 /*
1890 * The following code is moved from os.cpp for making this
1891 * code platform specific, which it is by its very nature.
1892 */
1893
1894 // Return maximum OS signal used + 1 for internal use only
1895 // Used as exit signal for signal_thread
1896 int os::sigexitnum_pd(){
1897 return NSIG;
1898 }
1899
1900 // a counter for each possible signal value, including signal_thread exit signal
1901 static volatile jint pending_signals[NSIG+1] = { 0 };
1902 static HANDLE sig_sem;
1903
1904 void os::signal_init_pd() {
1905 // Initialize signal structures
1906 memset((void*)pending_signals, 0, sizeof(pending_signals));
1907
1908 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL);
1909
1910 // Programs embedding the VM do not want it to attempt to receive
1911 // events like CTRL_LOGOFF_EVENT, which are used to implement the
1912 // shutdown hooks mechanism introduced in 1.3. For example, when
1913 // the VM is run as part of a Windows NT service (i.e., a servlet
1914 // engine in a web server), the correct behavior is for any console
1915 // control handler to return FALSE, not TRUE, because the OS's
1916 // "final" handler for such events allows the process to continue if
1917 // it is a service (while terminating it if it is not a service).
1918 // To make this behavior uniform and the mechanism simpler, we
1919 // completely disable the VM's usage of these console events if -Xrs
1920 // (=ReduceSignalUsage) is specified. This means, for example, that
1921 // the CTRL-BREAK thread dump mechanism is also disabled in this
1922 // case. See bugs 4323062, 4345157, and related bugs.
1923
1924 if (!ReduceSignalUsage) {
1925 // Add a CTRL-C handler
1926 SetConsoleCtrlHandler(consoleHandler, TRUE);
1927 }
1928 }
1929
1930 void os::signal_notify(int signal_number) {
1931 BOOL ret;
1932
1933 Atomic::inc(&pending_signals[signal_number]);
1934 ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
1935 assert(ret != 0, "ReleaseSemaphore() failed");
1936 }
1937
1938 static int check_pending_signals(bool wait_for_signal) {
1939 DWORD ret;
1940 while (true) {
1941 for (int i = 0; i < NSIG + 1; i++) {
1942 jint n = pending_signals[i];
1943 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
1944 return i;
1945 }
1946 }
1947 if (!wait_for_signal) {
1948 return -1;
1949 }
1950
1951 JavaThread *thread = JavaThread::current();
1952
1953 ThreadBlockInVM tbivm(thread);
1954
1955 bool threadIsSuspended;
1956 do {
1957 thread->set_suspend_equivalent();
1958 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
1959 ret = ::WaitForSingleObject(sig_sem, INFINITE);
1960 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed");
1961
1962 // were we externally suspended while we were waiting?
1963 threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
1964 if (threadIsSuspended) {
1965 //
1966 // The semaphore has been incremented, but while we were waiting
1967 // another thread suspended us. We don't want to continue running
1968 // while suspended because that would surprise the thread that
1969 // suspended us.
1970 //
1971 ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
1972 assert(ret != 0, "ReleaseSemaphore() failed");
1973
1974 thread->java_suspend_self();
1975 }
1976 } while (threadIsSuspended);
1977 }
1978 }
1979
1980 int os::signal_lookup() {
1981 return check_pending_signals(false);
1982 }
1983
1984 int os::signal_wait() {
1985 return check_pending_signals(true);
1986 }
1987
1988 // Implicit OS exception handling
1989
1990 LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) {
1991 JavaThread* thread = JavaThread::current();
1992 // Save pc in thread
1993 #ifdef _M_IA64
1994 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP);
1995 // Set pc to handler
1996 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler;
1997 #elif _M_AMD64
1998 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip);
1999 // Set pc to handler
2000 exceptionInfo->ContextRecord->Rip = (DWORD64)handler;
2001 #else
2002 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip);
2003 // Set pc to handler
2004 exceptionInfo->ContextRecord->Eip = (LONG)handler;
2005 #endif
2006
2007 // Continue the execution
2008 return EXCEPTION_CONTINUE_EXECUTION;
2009 }
2010
2011
2012 // Used for PostMortemDump
2013 extern "C" void safepoints();
2014 extern "C" void find(int x);
2015 extern "C" void events();
2016
2017 // According to Windows API documentation, an illegal instruction sequence should generate
2018 // the 0xC000001C exception code. However, real world experience shows that occasionnaly
2019 // the execution of an illegal instruction can generate the exception code 0xC000001E. This
2020 // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems).
2021
2022 #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E
2023
2024 // From "Execution Protection in the Windows Operating System" draft 0.35
2025 // Once a system header becomes available, the "real" define should be
2026 // included or copied here.
2027 #define EXCEPTION_INFO_EXEC_VIOLATION 0x08
2028
2029 #define def_excpt(val) #val, val
2030
2031 struct siglabel {
2032 char *name;
2033 int number;
2034 };
2035
2036 // All Visual C++ exceptions thrown from code generated by the Microsoft Visual
2037 // C++ compiler contain this error code. Because this is a compiler-generated
2038 // error, the code is not listed in the Win32 API header files.
2039 // The code is actually a cryptic mnemonic device, with the initial "E"
2040 // standing for "exception" and the final 3 bytes (0x6D7363) representing the
2041 // ASCII values of "msc".
2042
2043 #define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363
2044
2045
2046 struct siglabel exceptlabels[] = {
2047 def_excpt(EXCEPTION_ACCESS_VIOLATION),
2048 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
2049 def_excpt(EXCEPTION_BREAKPOINT),
2050 def_excpt(EXCEPTION_SINGLE_STEP),
2051 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED),
2052 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND),
2053 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO),
2054 def_excpt(EXCEPTION_FLT_INEXACT_RESULT),
2055 def_excpt(EXCEPTION_FLT_INVALID_OPERATION),
2056 def_excpt(EXCEPTION_FLT_OVERFLOW),
2057 def_excpt(EXCEPTION_FLT_STACK_CHECK),
2058 def_excpt(EXCEPTION_FLT_UNDERFLOW),
2059 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO),
2060 def_excpt(EXCEPTION_INT_OVERFLOW),
2061 def_excpt(EXCEPTION_PRIV_INSTRUCTION),
2062 def_excpt(EXCEPTION_IN_PAGE_ERROR),
2063 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION),
2064 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2),
2065 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION),
2066 def_excpt(EXCEPTION_STACK_OVERFLOW),
2067 def_excpt(EXCEPTION_INVALID_DISPOSITION),
2068 def_excpt(EXCEPTION_GUARD_PAGE),
2069 def_excpt(EXCEPTION_INVALID_HANDLE),
2070 def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION),
2071 NULL, 0
2072 };
2073
2074 const char* os::exception_name(int exception_code, char *buf, size_t size) {
2075 for (int i = 0; exceptlabels[i].name != NULL; i++) {
2076 if (exceptlabels[i].number == exception_code) {
2077 jio_snprintf(buf, size, "%s", exceptlabels[i].name);
2078 return buf;
2079 }
2080 }
2081
2082 return NULL;
2083 }
2084
2085 //-----------------------------------------------------------------------------
2086 LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2087 // handle exception caused by idiv; should only happen for -MinInt/-1
2088 // (division by zero is handled explicitly)
2089 #ifdef _M_IA64
2090 assert(0, "Fix Handle_IDiv_Exception");
2091 #elif _M_AMD64
2092 PCONTEXT ctx = exceptionInfo->ContextRecord;
2093 address pc = (address)ctx->Rip;
2094 assert(pc[0] == 0xF7, "not an idiv opcode");
2095 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2096 assert(ctx->Rax == min_jint, "unexpected idiv exception");
2097 // set correct result values and continue after idiv instruction
2098 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2099 ctx->Rax = (DWORD)min_jint; // result
2100 ctx->Rdx = (DWORD)0; // remainder
2101 // Continue the execution
2102 #else
2103 PCONTEXT ctx = exceptionInfo->ContextRecord;
2104 address pc = (address)ctx->Eip;
2105 assert(pc[0] == 0xF7, "not an idiv opcode");
2106 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2107 assert(ctx->Eax == min_jint, "unexpected idiv exception");
2108 // set correct result values and continue after idiv instruction
2109 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2110 ctx->Eax = (DWORD)min_jint; // result
2111 ctx->Edx = (DWORD)0; // remainder
2112 // Continue the execution
2113 #endif
2114 return EXCEPTION_CONTINUE_EXECUTION;
2115 }
2116
2117 #ifndef _WIN64
2118 //-----------------------------------------------------------------------------
2119 LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
2120 // handle exception caused by native method modifying control word
2121 PCONTEXT ctx = exceptionInfo->ContextRecord;
2122 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2123
2124 switch (exception_code) {
2125 case EXCEPTION_FLT_DENORMAL_OPERAND:
2126 case EXCEPTION_FLT_DIVIDE_BY_ZERO:
2127 case EXCEPTION_FLT_INEXACT_RESULT:
2128 case EXCEPTION_FLT_INVALID_OPERATION:
2129 case EXCEPTION_FLT_OVERFLOW:
2130 case EXCEPTION_FLT_STACK_CHECK:
2131 case EXCEPTION_FLT_UNDERFLOW:
2132 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std());
2133 if (fp_control_word != ctx->FloatSave.ControlWord) {
2134 // Restore FPCW and mask out FLT exceptions
2135 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0;
2136 // Mask out pending FLT exceptions
2137 ctx->FloatSave.StatusWord &= 0xffffff00;
2138 return EXCEPTION_CONTINUE_EXECUTION;
2139 }
2140 }
2141
2142 if (prev_uef_handler != NULL) {
2143 // We didn't handle this exception so pass it to the previous
2144 // UnhandledExceptionFilter.
2145 return (prev_uef_handler)(exceptionInfo);
2146 }
2147
2148 return EXCEPTION_CONTINUE_SEARCH;
2149 }
2150 #else //_WIN64
2151 /*
2152 On Windows, the mxcsr control bits are non-volatile across calls
2153 See also CR 6192333
2154 If EXCEPTION_FLT_* happened after some native method modified
2155 mxcsr - it is not a jvm fault.
2156 However should we decide to restore of mxcsr after a faulty
2157 native method we can uncomment following code
2158 jint MxCsr = INITIAL_MXCSR;
2159 // we can't use StubRoutines::addr_mxcsr_std()
2160 // because in Win64 mxcsr is not saved there
2161 if (MxCsr != ctx->MxCsr) {
2162 ctx->MxCsr = MxCsr;
2163 return EXCEPTION_CONTINUE_EXECUTION;
2164 }
2165
2166 */
2167 #endif //_WIN64
2168
2169
2170 // Fatal error reporting is single threaded so we can make this a
2171 // static and preallocated. If it's more than MAX_PATH silently ignore
2172 // it.
2173 static char saved_error_file[MAX_PATH] = {0};
2174
2175 void os::set_error_file(const char *logfile) {
2176 if (strlen(logfile) <= MAX_PATH) {
2177 strncpy(saved_error_file, logfile, MAX_PATH);
2178 }
2179 }
2180
2181 static inline void report_error(Thread* t, DWORD exception_code,
2182 address addr, void* siginfo, void* context) {
2183 VMError err(t, exception_code, addr, siginfo, context);
2184 err.report_and_die();
2185
2186 // If UseOsErrorReporting, this will return here and save the error file
2187 // somewhere where we can find it in the minidump.
2188 }
2189
2190 //-----------------------------------------------------------------------------
2191 LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
2192 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH;
2193 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2194 #ifdef _M_IA64
2195 address pc = (address) exceptionInfo->ContextRecord->StIIP;
2196 #elif _M_AMD64
2197 address pc = (address) exceptionInfo->ContextRecord->Rip;
2198 #else
2199 address pc = (address) exceptionInfo->ContextRecord->Eip;
2200 #endif
2201 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady
2202
2203 #ifndef _WIN64
2204 // Execution protection violation - win32 running on AMD64 only
2205 // Handled first to avoid misdiagnosis as a "normal" access violation;
2206 // This is safe to do because we have a new/unique ExceptionInformation
2207 // code for this condition.
2208 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2209 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2210 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0];
2211 address addr = (address) exceptionRecord->ExceptionInformation[1];
2212
2213 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) {
2214 int page_size = os::vm_page_size();
2215
2216 // Make sure the pc and the faulting address are sane.
2217 //
2218 // If an instruction spans a page boundary, and the page containing
2219 // the beginning of the instruction is executable but the following
2220 // page is not, the pc and the faulting address might be slightly
2221 // different - we still want to unguard the 2nd page in this case.
2222 //
2223 // 15 bytes seems to be a (very) safe value for max instruction size.
2224 bool pc_is_near_addr =
2225 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
2226 bool instr_spans_page_boundary =
2227 (align_size_down((intptr_t) pc ^ (intptr_t) addr,
2228 (intptr_t) page_size) > 0);
2229
2230 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
2231 static volatile address last_addr =
2232 (address) os::non_memory_address_word();
2233
2234 // In conservative mode, don't unguard unless the address is in the VM
2235 if (UnguardOnExecutionViolation > 0 && addr != last_addr &&
2236 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
2237
2238 // Set memory to RWX and retry
2239 address page_start =
2240 (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
2241 bool res = os::protect_memory((char*) page_start, page_size,
2242 os::MEM_PROT_RWX);
2243
2244 if (PrintMiscellaneous && Verbose) {
2245 char buf[256];
2246 jio_snprintf(buf, sizeof(buf), "Execution protection violation "
2247 "at " INTPTR_FORMAT
2248 ", unguarding " INTPTR_FORMAT ": %s", addr,
2249 page_start, (res ? "success" : strerror(errno)));
2250 tty->print_raw_cr(buf);
2251 }
2252
2253 // Set last_addr so if we fault again at the same address, we don't
2254 // end up in an endless loop.
2255 //
2256 // There are two potential complications here. Two threads trapping
2257 // at the same address at the same time could cause one of the
2258 // threads to think it already unguarded, and abort the VM. Likely
2259 // very rare.
2260 //
2261 // The other race involves two threads alternately trapping at
2262 // different addresses and failing to unguard the page, resulting in
2263 // an endless loop. This condition is probably even more unlikely
2264 // than the first.
2265 //
2266 // Although both cases could be avoided by using locks or thread
2267 // local last_addr, these solutions are unnecessary complication:
2268 // this handler is a best-effort safety net, not a complete solution.
2269 // It is disabled by default and should only be used as a workaround
2270 // in case we missed any no-execute-unsafe VM code.
2271
2272 last_addr = addr;
2273
2274 return EXCEPTION_CONTINUE_EXECUTION;
2275 }
2276 }
2277
2278 // Last unguard failed or not unguarding
2279 tty->print_raw_cr("Execution protection violation");
2280 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord,
2281 exceptionInfo->ContextRecord);
2282 return EXCEPTION_CONTINUE_SEARCH;
2283 }
2284 }
2285 #endif // _WIN64
2286
2287 // Check to see if we caught the safepoint code in the
2288 // process of write protecting the memory serialization page.
2289 // It write enables the page immediately after protecting it
2290 // so just return.
2291 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
2292 JavaThread* thread = (JavaThread*) t;
2293 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2294 address addr = (address) exceptionRecord->ExceptionInformation[1];
2295 if ( os::is_memory_serialize_page(thread, addr) ) {
2296 // Block current thread until the memory serialize page permission restored.
2297 os::block_on_serialize_page_trap();
2298 return EXCEPTION_CONTINUE_EXECUTION;
2299 }
2300 }
2301
2302 if (t != NULL && t->is_Java_thread()) {
2303 JavaThread* thread = (JavaThread*) t;
2304 bool in_java = thread->thread_state() == _thread_in_Java;
2305
2306 // Handle potential stack overflows up front.
2307 if (exception_code == EXCEPTION_STACK_OVERFLOW) {
2308 if (os::uses_stack_guard_pages()) {
2309 #ifdef _M_IA64
2310 //
2311 // If it's a legal stack address continue, Windows will map it in.
2312 //
2313 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2314 address addr = (address) exceptionRecord->ExceptionInformation[1];
2315 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() )
2316 return EXCEPTION_CONTINUE_EXECUTION;
2317
2318 // The register save area is the same size as the memory stack
2319 // and starts at the page just above the start of the memory stack.
2320 // If we get a fault in this area, we've run out of register
2321 // stack. If we are in java, try throwing a stack overflow exception.
2322 if (addr > thread->stack_base() &&
2323 addr <= (thread->stack_base()+thread->stack_size()) ) {
2324 char buf[256];
2325 jio_snprintf(buf, sizeof(buf),
2326 "Register stack overflow, addr:%p, stack_base:%p\n",
2327 addr, thread->stack_base() );
2328 tty->print_raw_cr(buf);
2329 // If not in java code, return and hope for the best.
2330 return in_java ? Handle_Exception(exceptionInfo,
2331 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
2332 : EXCEPTION_CONTINUE_EXECUTION;
2333 }
2334 #endif
2335 if (thread->stack_yellow_zone_enabled()) {
2336 // Yellow zone violation. The o/s has unprotected the first yellow
2337 // zone page for us. Note: must call disable_stack_yellow_zone to
2338 // update the enabled status, even if the zone contains only one page.
2339 thread->disable_stack_yellow_zone();
2340 // If not in java code, return and hope for the best.
2341 return in_java ? Handle_Exception(exceptionInfo,
2342 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
2343 : EXCEPTION_CONTINUE_EXECUTION;
2344 } else {
2345 // Fatal red zone violation.
2346 thread->disable_stack_red_zone();
2347 tty->print_raw_cr("An unrecoverable stack overflow has occurred.");
2348 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2349 exceptionInfo->ContextRecord);
2350 return EXCEPTION_CONTINUE_SEARCH;
2351 }
2352 } else if (in_java) {
2353 // JVM-managed guard pages cannot be used on win95/98. The o/s provides
2354 // a one-time-only guard page, which it has released to us. The next
2355 // stack overflow on this thread will result in an ACCESS_VIOLATION.
2356 return Handle_Exception(exceptionInfo,
2357 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2358 } else {
2359 // Can only return and hope for the best. Further stack growth will
2360 // result in an ACCESS_VIOLATION.
2361 return EXCEPTION_CONTINUE_EXECUTION;
2362 }
2363 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2364 // Either stack overflow or null pointer exception.
2365 if (in_java) {
2366 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2367 address addr = (address) exceptionRecord->ExceptionInformation[1];
2368 address stack_end = thread->stack_base() - thread->stack_size();
2369 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) {
2370 // Stack overflow.
2371 assert(!os::uses_stack_guard_pages(),
2372 "should be caught by red zone code above.");
2373 return Handle_Exception(exceptionInfo,
2374 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2375 }
2376 //
2377 // Check for safepoint polling and implicit null
2378 // We only expect null pointers in the stubs (vtable)
2379 // the rest are checked explicitly now.
2380 //
2381 CodeBlob* cb = CodeCache::find_blob(pc);
2382 if (cb != NULL) {
2383 if (os::is_poll_address(addr)) {
2384 address stub = SharedRuntime::get_poll_stub(pc);
2385 return Handle_Exception(exceptionInfo, stub);
2386 }
2387 }
2388 {
2389 #ifdef _WIN64
2390 //
2391 // If it's a legal stack address map the entire region in
2392 //
2393 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
2394 address addr = (address) exceptionRecord->ExceptionInformation[1];
2395 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
2396 addr = (address)((uintptr_t)addr &
2397 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
2398 os::commit_memory((char *)addr, thread->stack_base() - addr,
2399 false );
2400 return EXCEPTION_CONTINUE_EXECUTION;
2401 }
2402 else
2403 #endif
2404 {
2405 // Null pointer exception.
2406 #ifdef _M_IA64
2407 // We catch register stack overflows in compiled code by doing
2408 // an explicit compare and executing a st8(G0, G0) if the
2409 // BSP enters into our guard area. We test for the overflow
2410 // condition and fall into the normal null pointer exception
2411 // code if BSP hasn't overflowed.
2412 if ( in_java ) {
2413 if(thread->register_stack_overflow()) {
2414 assert((address)exceptionInfo->ContextRecord->IntS3 ==
2415 thread->register_stack_limit(),
2416 "GR7 doesn't contain register_stack_limit");
2417 // Disable the yellow zone which sets the state that
2418 // we've got a stack overflow problem.
2419 if (thread->stack_yellow_zone_enabled()) {
2420 thread->disable_stack_yellow_zone();
2421 }
2422 // Give us some room to process the exception
2423 thread->disable_register_stack_guard();
2424 // Update GR7 with the new limit so we can continue running
2425 // compiled code.
2426 exceptionInfo->ContextRecord->IntS3 =
2427 (ULONGLONG)thread->register_stack_limit();
2428 return Handle_Exception(exceptionInfo,
2429 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
2430 } else {
2431 //
2432 // Check for implicit null
2433 // We only expect null pointers in the stubs (vtable)
2434 // the rest are checked explicitly now.
2435 //
2436 if (((uintptr_t)addr) < os::vm_page_size() ) {
2437 // an access to the first page of VM--assume it is a null pointer
2438 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
2439 if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
2440 }
2441 }
2442 } // in_java
2443
2444 // IA64 doesn't use implicit null checking yet. So we shouldn't
2445 // get here.
2446 tty->print_raw_cr("Access violation, possible null pointer exception");
2447 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2448 exceptionInfo->ContextRecord);
2449 return EXCEPTION_CONTINUE_SEARCH;
2450 #else /* !IA64 */
2451
2452 // Windows 98 reports faulting addresses incorrectly
2453 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) ||
2454 !os::win32::is_nt()) {
2455 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
2456 if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
2457 }
2458 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2459 exceptionInfo->ContextRecord);
2460 return EXCEPTION_CONTINUE_SEARCH;
2461 #endif
2462 }
2463 }
2464 }
2465
2466 #ifdef _WIN64
2467 // Special care for fast JNI field accessors.
2468 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks
2469 // in and the heap gets shrunk before the field access.
2470 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2471 address addr = JNI_FastGetField::find_slowcase_pc(pc);
2472 if (addr != (address)-1) {
2473 return Handle_Exception(exceptionInfo, addr);
2474 }
2475 }
2476 #endif
2477
2478 // Stack overflow or null pointer exception in native code.
2479 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2480 exceptionInfo->ContextRecord);
2481 return EXCEPTION_CONTINUE_SEARCH;
2482 }
2483
2484 if (in_java) {
2485 switch (exception_code) {
2486 case EXCEPTION_INT_DIVIDE_BY_ZERO:
2487 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO));
2488
2489 case EXCEPTION_INT_OVERFLOW:
2490 return Handle_IDiv_Exception(exceptionInfo);
2491
2492 } // switch
2493 }
2494 #ifndef _WIN64
2495 if (((thread->thread_state() == _thread_in_Java) ||
2496 (thread->thread_state() == _thread_in_native)) &&
2497 exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION)
2498 {
2499 LONG result=Handle_FLT_Exception(exceptionInfo);
2500 if (result==EXCEPTION_CONTINUE_EXECUTION) return result;
2501 }
2502 #endif //_WIN64
2503 }
2504
2505 if (exception_code != EXCEPTION_BREAKPOINT) {
2506 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
2507 exceptionInfo->ContextRecord);
2508 }
2509 return EXCEPTION_CONTINUE_SEARCH;
2510 }
2511
2512 #ifndef _WIN64
2513 // Special care for fast JNI accessors.
2514 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and
2515 // the heap gets shrunk before the field access.
2516 // Need to install our own structured exception handler since native code may
2517 // install its own.
2518 LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
2519 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
2520 if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
2521 address pc = (address) exceptionInfo->ContextRecord->Eip;
2522 address addr = JNI_FastGetField::find_slowcase_pc(pc);
2523 if (addr != (address)-1) {
2524 return Handle_Exception(exceptionInfo, addr);
2525 }
2526 }
2527 return EXCEPTION_CONTINUE_SEARCH;
2528 }
2529
2530 #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \
2531 Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \
2532 __try { \
2533 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \
2534 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \
2535 } \
2536 return 0; \
2537 }
2538
2539 DEFINE_FAST_GETFIELD(jboolean, bool, Boolean)
2540 DEFINE_FAST_GETFIELD(jbyte, byte, Byte)
2541 DEFINE_FAST_GETFIELD(jchar, char, Char)
2542 DEFINE_FAST_GETFIELD(jshort, short, Short)
2543 DEFINE_FAST_GETFIELD(jint, int, Int)
2544 DEFINE_FAST_GETFIELD(jlong, long, Long)
2545 DEFINE_FAST_GETFIELD(jfloat, float, Float)
2546 DEFINE_FAST_GETFIELD(jdouble, double, Double)
2547
2548 address os::win32::fast_jni_accessor_wrapper(BasicType type) {
2549 switch (type) {
2550 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper;
2551 case T_BYTE: return (address)jni_fast_GetByteField_wrapper;
2552 case T_CHAR: return (address)jni_fast_GetCharField_wrapper;
2553 case T_SHORT: return (address)jni_fast_GetShortField_wrapper;
2554 case T_INT: return (address)jni_fast_GetIntField_wrapper;
2555 case T_LONG: return (address)jni_fast_GetLongField_wrapper;
2556 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper;
2557 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper;
2558 default: ShouldNotReachHere();
2559 }
2560 return (address)-1;
2561 }
2562 #endif
2563
2564 // Virtual Memory
2565
2566 int os::vm_page_size() { return os::win32::vm_page_size(); }
2567 int os::vm_allocation_granularity() {
2568 return os::win32::vm_allocation_granularity();
2569 }
2570
2571 // Windows large page support is available on Windows 2003. In order to use
2572 // large page memory, the administrator must first assign additional privilege
2573 // to the user:
2574 // + select Control Panel -> Administrative Tools -> Local Security Policy
2575 // + select Local Policies -> User Rights Assignment
2576 // + double click "Lock pages in memory", add users and/or groups
2577 // + reboot
2578 // Note the above steps are needed for administrator as well, as administrators
2579 // by default do not have the privilege to lock pages in memory.
2580 //
2581 // Note about Windows 2003: although the API supports committing large page
2582 // memory on a page-by-page basis and VirtualAlloc() returns success under this
2583 // scenario, I found through experiment it only uses large page if the entire
2584 // memory region is reserved and committed in a single VirtualAlloc() call.
2585 // This makes Windows large page support more or less like Solaris ISM, in
2586 // that the entire heap must be committed upfront. This probably will change
2587 // in the future, if so the code below needs to be revisited.
2588
2589 #ifndef MEM_LARGE_PAGES
2590 #define MEM_LARGE_PAGES 0x20000000
2591 #endif
2592
2593 static HANDLE _hProcess;
2594 static HANDLE _hToken;
2595
2596 // Container for NUMA node list info
2597 class NUMANodeListHolder {
2598 private:
2599 int *_numa_used_node_list; // allocated below
2600 int _numa_used_node_count;
2601
2602 void free_node_list() {
2603 if (_numa_used_node_list != NULL) {
2604 FREE_C_HEAP_ARRAY(int, _numa_used_node_list, mtInternal);
2605 }
2606 }
2607
2608 public:
2609 NUMANodeListHolder() {
2610 _numa_used_node_count = 0;
2611 _numa_used_node_list = NULL;
2612 // do rest of initialization in build routine (after function pointers are set up)
2613 }
2614
2615 ~NUMANodeListHolder() {
2616 free_node_list();
2617 }
2618
2619 bool build() {
2620 DWORD_PTR proc_aff_mask;
2621 DWORD_PTR sys_aff_mask;
2622 if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false;
2623 ULONG highest_node_number;
2624 if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false;
2625 free_node_list();
2626 _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1, mtInternal);
2627 for (unsigned int i = 0; i <= highest_node_number; i++) {
2628 ULONGLONG proc_mask_numa_node;
2629 if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false;
2630 if ((proc_aff_mask & proc_mask_numa_node)!=0) {
2631 _numa_used_node_list[_numa_used_node_count++] = i;
2632 }
2633 }
2634 return (_numa_used_node_count > 1);
2635 }
2636
2637 int get_count() {return _numa_used_node_count;}
2638 int get_node_list_entry(int n) {
2639 // for indexes out of range, returns -1
2640 return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1);
2641 }
2642
2643 } numa_node_list_holder;
2644
2645
2646
2647 static size_t _large_page_size = 0;
2648
2649 static bool resolve_functions_for_large_page_init() {
2650 return os::Kernel32Dll::GetLargePageMinimumAvailable() &&
2651 os::Advapi32Dll::AdvapiAvailable();
2652 }
2653
2654 static bool request_lock_memory_privilege() {
2655 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE,
2656 os::current_process_id());
2657
2658 LUID luid;
2659 if (_hProcess != NULL &&
2660 os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) &&
2661 os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) {
2662
2663 TOKEN_PRIVILEGES tp;
2664 tp.PrivilegeCount = 1;
2665 tp.Privileges[0].Luid = luid;
2666 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
2667
2668 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the
2669 // privilege. Check GetLastError() too. See MSDN document.
2670 if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) &&
2671 (GetLastError() == ERROR_SUCCESS)) {
2672 return true;
2673 }
2674 }
2675
2676 return false;
2677 }
2678
2679 static void cleanup_after_large_page_init() {
2680 if (_hProcess) CloseHandle(_hProcess);
2681 _hProcess = NULL;
2682 if (_hToken) CloseHandle(_hToken);
2683 _hToken = NULL;
2684 }
2685
2686 static bool numa_interleaving_init() {
2687 bool success = false;
2688 bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving);
2689
2690 // print a warning if UseNUMAInterleaving flag is specified on command line
2691 bool warn_on_failure = use_numa_interleaving_specified;
2692 # define WARN(msg) if (warn_on_failure) { warning(msg); }
2693
2694 // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages)
2695 size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
2696 NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity);
2697
2698 if (os::Kernel32Dll::NumaCallsAvailable()) {
2699 if (numa_node_list_holder.build()) {
2700 if (PrintMiscellaneous && Verbose) {
2701 tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count());
2702 for (int i = 0; i < numa_node_list_holder.get_count(); i++) {
2703 tty->print("%d ", numa_node_list_holder.get_node_list_entry(i));
2704 }
2705 tty->print("\n");
2706 }
2707 success = true;
2708 } else {
2709 WARN("Process does not cover multiple NUMA nodes.");
2710 }
2711 } else {
2712 WARN("NUMA Interleaving is not supported by the operating system.");
2713 }
2714 if (!success) {
2715 if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag.");
2716 }
2717 return success;
2718 #undef WARN
2719 }
2720
2721 // this routine is used whenever we need to reserve a contiguous VA range
2722 // but we need to make separate VirtualAlloc calls for each piece of the range
2723 // Reasons for doing this:
2724 // * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise)
2725 // * UseNUMAInterleaving requires a separate node for each piece
2726 static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot,
2727 bool should_inject_error=false) {
2728 char * p_buf;
2729 // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size
2730 size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
2731 size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size;
2732
2733 // first reserve enough address space in advance since we want to be
2734 // able to break a single contiguous virtual address range into multiple
2735 // large page commits but WS2003 does not allow reserving large page space
2736 // so we just use 4K pages for reserve, this gives us a legal contiguous
2737 // address space. then we will deallocate that reservation, and re alloc
2738 // using large pages
2739 const size_t size_of_reserve = bytes + chunk_size;
2740 if (bytes > size_of_reserve) {
2741 // Overflowed.
2742 return NULL;
2743 }
2744 p_buf = (char *) VirtualAlloc(addr,
2745 size_of_reserve, // size of Reserve
2746 MEM_RESERVE,
2747 PAGE_READWRITE);
2748 // If reservation failed, return NULL
2749 if (p_buf == NULL) return NULL;
2750
2751 os::release_memory(p_buf, bytes + chunk_size);
2752
2753 // we still need to round up to a page boundary (in case we are using large pages)
2754 // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size)
2755 // instead we handle this in the bytes_to_rq computation below
2756 p_buf = (char *) align_size_up((size_t)p_buf, page_size);
2757
2758 // now go through and allocate one chunk at a time until all bytes are
2759 // allocated
2760 size_t bytes_remaining = bytes;
2761 // An overflow of align_size_up() would have been caught above
2762 // in the calculation of size_of_reserve.
2763 char * next_alloc_addr = p_buf;
2764 HANDLE hProc = GetCurrentProcess();
2765
2766 #ifdef ASSERT
2767 // Variable for the failure injection
2768 long ran_num = os::random();
2769 size_t fail_after = ran_num % bytes;
2770 #endif
2771
2772 int count=0;
2773 while (bytes_remaining) {
2774 // select bytes_to_rq to get to the next chunk_size boundary
2775
2776 size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size));
2777 // Note allocate and commit
2778 char * p_new;
2779
2780 #ifdef ASSERT
2781 bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after);
2782 #else
2783 const bool inject_error_now = false;
2784 #endif
2785
2786 if (inject_error_now) {
2787 p_new = NULL;
2788 } else {
2789 if (!UseNUMAInterleaving) {
2790 p_new = (char *) VirtualAlloc(next_alloc_addr,
2791 bytes_to_rq,
2792 flags,
2793 prot);
2794 } else {
2795 // get the next node to use from the used_node_list
2796 assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected");
2797 DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count());
2798 p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc,
2799 next_alloc_addr,
2800 bytes_to_rq,
2801 flags,
2802 prot,
2803 node);
2804 }
2805 }
2806
2807 if (p_new == NULL) {
2808 // Free any allocated pages
2809 if (next_alloc_addr > p_buf) {
2810 // Some memory was committed so release it.
2811 size_t bytes_to_release = bytes - bytes_remaining;
2812 os::release_memory(p_buf, bytes_to_release);
2813 }
2814 #ifdef ASSERT
2815 if (should_inject_error) {
2816 if (TracePageSizes && Verbose) {
2817 tty->print_cr("Reserving pages individually failed.");
2818 }
2819 }
2820 #endif
2821 return NULL;
2822 }
2823 bytes_remaining -= bytes_to_rq;
2824 next_alloc_addr += bytes_to_rq;
2825 count++;
2826 }
2827 // made it this far, success
2828 return p_buf;
2829 }
2830
2831
2832
2833 void os::large_page_init() {
2834 if (!UseLargePages) return;
2835
2836 // print a warning if any large page related flag is specified on command line
2837 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
2838 !FLAG_IS_DEFAULT(LargePageSizeInBytes);
2839 bool success = false;
2840
2841 # define WARN(msg) if (warn_on_failure) { warning(msg); }
2842 if (resolve_functions_for_large_page_init()) {
2843 if (request_lock_memory_privilege()) {
2844 size_t s = os::Kernel32Dll::GetLargePageMinimum();
2845 if (s) {
2846 #if defined(IA32) || defined(AMD64)
2847 if (s > 4*M || LargePageSizeInBytes > 4*M) {
2848 WARN("JVM cannot use large pages bigger than 4mb.");
2849 } else {
2850 #endif
2851 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) {
2852 _large_page_size = LargePageSizeInBytes;
2853 } else {
2854 _large_page_size = s;
2855 }
2856 success = true;
2857 #if defined(IA32) || defined(AMD64)
2858 }
2859 #endif
2860 } else {
2861 WARN("Large page is not supported by the processor.");
2862 }
2863 } else {
2864 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.");
2865 }
2866 } else {
2867 WARN("Large page is not supported by the operating system.");
2868 }
2869 #undef WARN
2870
2871 const size_t default_page_size = (size_t) vm_page_size();
2872 if (success && _large_page_size > default_page_size) {
2873 _page_sizes[0] = _large_page_size;
2874 _page_sizes[1] = default_page_size;
2875 _page_sizes[2] = 0;
2876 }
2877
2878 cleanup_after_large_page_init();
2879 UseLargePages = success;
2880 }
2881
2882 // On win32, one cannot release just a part of reserved memory, it's an
2883 // all or nothing deal. When we split a reservation, we must break the
2884 // reservation into two reservations.
2885 void os::pd_split_reserved_memory(char *base, size_t size, size_t split,
2886 bool realloc) {
2887 if (size > 0) {
2888 release_memory(base, size);
2889 if (realloc) {
2890 reserve_memory(split, base);
2891 }
2892 if (size != split) {
2893 reserve_memory(size - split, base + split);
2894 }
2895 }
2896 }
2897
2898 char* os::reserve_memory_aligned(size_t size, size_t alignment) {
2899 assert((alignment & (os::vm_allocation_granularity() - 1)) == 0,
2900 "Alignment must be a multiple of allocation granularity (page size)");
2901 assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned");
2902
2903 size_t extra_size = size + alignment;
2904 assert(extra_size >= size, "overflow, size is too large to allow alignment");
2905
2906 char* aligned_base = NULL;
2907
2908 do {
2909 char* extra_base = os::reserve_memory(extra_size, NULL, alignment);
2910 if (extra_base == NULL) {
2911 return NULL;
2912 }
2913 // Do manual alignment
2914 aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment);
2915
2916 os::release_memory(extra_base, extra_size);
2917
2918 aligned_base = os::reserve_memory(size, aligned_base);
2919
2920 } while (aligned_base == NULL);
2921
2922 return aligned_base;
2923 }
2924
2925 char* os::pd_reserve_memory(size_t bytes, char* addr, size_t alignment_hint) {
2926 assert((size_t)addr % os::vm_allocation_granularity() == 0,
2927 "reserve alignment");
2928 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
2929 char* res;
2930 // note that if UseLargePages is on, all the areas that require interleaving
2931 // will go thru reserve_memory_special rather than thru here.
2932 bool use_individual = (UseNUMAInterleaving && !UseLargePages);
2933 if (!use_individual) {
2934 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
2935 } else {
2936 elapsedTimer reserveTimer;
2937 if( Verbose && PrintMiscellaneous ) reserveTimer.start();
2938 // in numa interleaving, we have to allocate pages individually
2939 // (well really chunks of NUMAInterleaveGranularity size)
2940 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE);
2941 if (res == NULL) {
2942 warning("NUMA page allocation failed");
2943 }
2944 if( Verbose && PrintMiscellaneous ) {
2945 reserveTimer.stop();
2946 tty->print_cr("reserve_memory of %Ix bytes took %ld ms (%ld ticks)", bytes,
2947 reserveTimer.milliseconds(), reserveTimer.ticks());
2948 }
2949 }
2950 assert(res == NULL || addr == NULL || addr == res,
2951 "Unexpected address from reserve.");
2952
2953 return res;
2954 }
2955
2956 // Reserve memory at an arbitrary address, only if that area is
2957 // available (and not reserved for something else).
2958 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
2959 // Windows os::reserve_memory() fails of the requested address range is
2960 // not avilable.
2961 return reserve_memory(bytes, requested_addr);
2962 }
2963
2964 size_t os::large_page_size() {
2965 return _large_page_size;
2966 }
2967
2968 bool os::can_commit_large_page_memory() {
2969 // Windows only uses large page memory when the entire region is reserved
2970 // and committed in a single VirtualAlloc() call. This may change in the
2971 // future, but with Windows 2003 it's not possible to commit on demand.
2972 return false;
2973 }
2974
2975 bool os::can_execute_large_page_memory() {
2976 return true;
2977 }
2978
2979 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
2980
2981 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
2982 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
2983
2984 // with large pages, there are two cases where we need to use Individual Allocation
2985 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003)
2986 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page
2987 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) {
2988 if (TracePageSizes && Verbose) {
2989 tty->print_cr("Reserving large pages individually.");
2990 }
2991 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError);
2992 if (p_buf == NULL) {
2993 // give an appropriate warning message
2994 if (UseNUMAInterleaving) {
2995 warning("NUMA large page allocation failed, UseLargePages flag ignored");
2996 }
2997 if (UseLargePagesIndividualAllocation) {
2998 warning("Individually allocated large pages failed, "
2999 "use -XX:-UseLargePagesIndividualAllocation to turn off");
3000 }
3001 return NULL;
3002 }
3003
3004 return p_buf;
3005
3006 } else {
3007 // normal policy just allocate it all at once
3008 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
3009 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot);
3010 return res;
3011 }
3012 }
3013
3014 bool os::release_memory_special(char* base, size_t bytes) {
3015 return release_memory(base, bytes);
3016 }
3017
3018 void os::print_statistics() {
3019 }
3020
3021 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
3022 if (bytes == 0) {
3023 // Don't bother the OS with noops.
3024 return true;
3025 }
3026 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries");
3027 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
3028 // Don't attempt to print anything if the OS call fails. We're
3029 // probably low on resources, so the print itself may cause crashes.
3030
3031 // unless we have NUMAInterleaving enabled, the range of a commit
3032 // is always within a reserve covered by a single VirtualAlloc
3033 // in that case we can just do a single commit for the requested size
3034 if (!UseNUMAInterleaving) {
3035 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false;
3036 if (exec) {
3037 DWORD oldprot;
3038 // Windows doc says to use VirtualProtect to get execute permissions
3039 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false;
3040 }
3041 return true;
3042 } else {
3043
3044 // when NUMAInterleaving is enabled, the commit might cover a range that
3045 // came from multiple VirtualAlloc reserves (using allocate_pages_individually).
3046 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery
3047 // returns represents the number of bytes that can be committed in one step.
3048 size_t bytes_remaining = bytes;
3049 char * next_alloc_addr = addr;
3050 while (bytes_remaining > 0) {
3051 MEMORY_BASIC_INFORMATION alloc_info;
3052 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info));
3053 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize);
3054 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL)
3055 return false;
3056 if (exec) {
3057 DWORD oldprot;
3058 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot))
3059 return false;
3060 }
3061 bytes_remaining -= bytes_to_rq;
3062 next_alloc_addr += bytes_to_rq;
3063 }
3064 }
3065 // if we made it this far, return true
3066 return true;
3067 }
3068
3069 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint,
3070 bool exec) {
3071 return commit_memory(addr, size, exec);
3072 }
3073
3074 bool os::pd_uncommit_memory(char* addr, size_t bytes) {
3075 if (bytes == 0) {
3076 // Don't bother the OS with noops.
3077 return true;
3078 }
3079 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries");
3080 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks");
3081 return (VirtualFree(addr, bytes, MEM_DECOMMIT) != 0);
3082 }
3083
3084 bool os::pd_release_memory(char* addr, size_t bytes) {
3085 return VirtualFree(addr, 0, MEM_RELEASE) != 0;
3086 }
3087
3088 bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
3089 return os::commit_memory(addr, size);
3090 }
3091
3092 bool os::remove_stack_guard_pages(char* addr, size_t size) {
3093 return os::uncommit_memory(addr, size);
3094 }
3095
3096 // Set protections specified
3097 bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
3098 bool is_committed) {
3099 unsigned int p = 0;
3100 switch (prot) {
3101 case MEM_PROT_NONE: p = PAGE_NOACCESS; break;
3102 case MEM_PROT_READ: p = PAGE_READONLY; break;
3103 case MEM_PROT_RW: p = PAGE_READWRITE; break;
3104 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break;
3105 default:
3106 ShouldNotReachHere();
3107 }
3108
3109 DWORD old_status;
3110
3111 // Strange enough, but on Win32 one can change protection only for committed
3112 // memory, not a big deal anyway, as bytes less or equal than 64K
3113 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) {
3114 fatal("cannot commit protection page");
3115 }
3116 // One cannot use os::guard_memory() here, as on Win32 guard page
3117 // have different (one-shot) semantics, from MSDN on PAGE_GUARD:
3118 //
3119 // Pages in the region become guard pages. Any attempt to access a guard page
3120 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off
3121 // the guard page status. Guard pages thus act as a one-time access alarm.
3122 return VirtualProtect(addr, bytes, p, &old_status) != 0;
3123 }
3124
3125 bool os::guard_memory(char* addr, size_t bytes) {
3126 DWORD old_status;
3127 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0;
3128 }
3129
3130 bool os::unguard_memory(char* addr, size_t bytes) {
3131 DWORD old_status;
3132 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0;
3133 }
3134
3135 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
3136 void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { }
3137 void os::numa_make_global(char *addr, size_t bytes) { }
3138 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { }
3139 bool os::numa_topology_changed() { return false; }
3140 size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); }
3141 int os::numa_get_group_id() { return 0; }
3142 size_t os::numa_get_leaf_groups(int *ids, size_t size) {
3143 if (numa_node_list_holder.get_count() == 0 && size > 0) {
3144 // Provide an answer for UMA systems
3145 ids[0] = 0;
3146 return 1;
3147 } else {
3148 // check for size bigger than actual groups_num
3149 size = MIN2(size, numa_get_groups_num());
3150 for (int i = 0; i < (int)size; i++) {
3151 ids[i] = numa_node_list_holder.get_node_list_entry(i);
3152 }
3153 return size;
3154 }
3155 }
3156
3157 bool os::get_page_info(char *start, page_info* info) {
3158 return false;
3159 }
3160
3161 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
3162 return end;
3163 }
3164
3165 char* os::non_memory_address_word() {
3166 // Must never look like an address returned by reserve_memory,
3167 // even in its subfields (as defined by the CPU immediate fields,
3168 // if the CPU splits constants across multiple instructions).
3169 return (char*)-1;
3170 }
3171
3172 #define MAX_ERROR_COUNT 100
3173 #define SYS_THREAD_ERROR 0xffffffffUL
3174
3175 void os::pd_start_thread(Thread* thread) {
3176 DWORD ret = ResumeThread(thread->osthread()->thread_handle());
3177 // Returns previous suspend state:
3178 // 0: Thread was not suspended
3179 // 1: Thread is running now
3180 // >1: Thread is still suspended.
3181 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back
3182 }
3183
3184 class HighResolutionInterval {
3185 // The default timer resolution seems to be 10 milliseconds.
3186 // (Where is this written down?)
3187 // If someone wants to sleep for only a fraction of the default,
3188 // then we set the timer resolution down to 1 millisecond for
3189 // the duration of their interval.
3190 // We carefully set the resolution back, since otherwise we
3191 // seem to incur an overhead (3%?) that we don't need.
3192 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time.
3193 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod().
3194 // Alternatively, we could compute the relative error (503/500 = .6%) and only use
3195 // timeBeginPeriod() if the relative error exceeded some threshold.
3196 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and
3197 // to decreased efficiency related to increased timer "tick" rates. We want to minimize
3198 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high
3199 // resolution timers running.
3200 private:
3201 jlong resolution;
3202 public:
3203 HighResolutionInterval(jlong ms) {
3204 resolution = ms % 10L;
3205 if (resolution != 0) {
3206 MMRESULT result = timeBeginPeriod(1L);
3207 }
3208 }
3209 ~HighResolutionInterval() {
3210 if (resolution != 0) {
3211 MMRESULT result = timeEndPeriod(1L);
3212 }
3213 resolution = 0L;
3214 }
3215 };
3216
3217 int os::sleep(Thread* thread, jlong ms, bool interruptable) {
3218 jlong limit = (jlong) MAXDWORD;
3219
3220 while(ms > limit) {
3221 int res;
3222 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT)
3223 return res;
3224 ms -= limit;
3225 }
3226
3227 assert(thread == Thread::current(), "thread consistency check");
3228 OSThread* osthread = thread->osthread();
3229 OSThreadWaitState osts(osthread, false /* not Object.wait() */);
3230 int result;
3231 if (interruptable) {
3232 assert(thread->is_Java_thread(), "must be java thread");
3233 JavaThread *jt = (JavaThread *) thread;
3234 ThreadBlockInVM tbivm(jt);
3235
3236 jt->set_suspend_equivalent();
3237 // cleared by handle_special_suspend_equivalent_condition() or
3238 // java_suspend_self() via check_and_wait_while_suspended()
3239
3240 HANDLE events[1];
3241 events[0] = osthread->interrupt_event();
3242 HighResolutionInterval *phri=NULL;
3243 if(!ForceTimeHighResolution)
3244 phri = new HighResolutionInterval( ms );
3245 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) {
3246 result = OS_TIMEOUT;
3247 } else {
3248 ResetEvent(osthread->interrupt_event());
3249 osthread->set_interrupted(false);
3250 result = OS_INTRPT;
3251 }
3252 delete phri; //if it is NULL, harmless
3253
3254 // were we externally suspended while we were waiting?
3255 jt->check_and_wait_while_suspended();
3256 } else {
3257 assert(!thread->is_Java_thread(), "must not be java thread");
3258 Sleep((long) ms);
3259 result = OS_TIMEOUT;
3260 }
3261 return result;
3262 }
3263
3264 // Sleep forever; naked call to OS-specific sleep; use with CAUTION
3265 void os::infinite_sleep() {
3266 while (true) { // sleep forever ...
3267 Sleep(100000); // ... 100 seconds at a time
3268 }
3269 }
3270
3271 typedef BOOL (WINAPI * STTSignature)(void) ;
3272
3273 os::YieldResult os::NakedYield() {
3274 // Use either SwitchToThread() or Sleep(0)
3275 // Consider passing back the return value from SwitchToThread().
3276 if (os::Kernel32Dll::SwitchToThreadAvailable()) {
3277 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ;
3278 } else {
3279 Sleep(0);
3280 }
3281 return os::YIELD_UNKNOWN ;
3282 }
3283
3284 void os::yield() { os::NakedYield(); }
3285
3286 void os::yield_all(int attempts) {
3287 // Yields to all threads, including threads with lower priorities
3288 Sleep(1);
3289 }
3290
3291 // Win32 only gives you access to seven real priorities at a time,
3292 // so we compress Java's ten down to seven. It would be better
3293 // if we dynamically adjusted relative priorities.
3294
3295 int os::java_to_os_priority[CriticalPriority + 1] = {
3296 THREAD_PRIORITY_IDLE, // 0 Entry should never be used
3297 THREAD_PRIORITY_LOWEST, // 1 MinPriority
3298 THREAD_PRIORITY_LOWEST, // 2
3299 THREAD_PRIORITY_BELOW_NORMAL, // 3
3300 THREAD_PRIORITY_BELOW_NORMAL, // 4
3301 THREAD_PRIORITY_NORMAL, // 5 NormPriority
3302 THREAD_PRIORITY_NORMAL, // 6
3303 THREAD_PRIORITY_ABOVE_NORMAL, // 7
3304 THREAD_PRIORITY_ABOVE_NORMAL, // 8
3305 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
3306 THREAD_PRIORITY_HIGHEST, // 10 MaxPriority
3307 THREAD_PRIORITY_HIGHEST // 11 CriticalPriority
3308 };
3309
3310 int prio_policy1[CriticalPriority + 1] = {
3311 THREAD_PRIORITY_IDLE, // 0 Entry should never be used
3312 THREAD_PRIORITY_LOWEST, // 1 MinPriority
3313 THREAD_PRIORITY_LOWEST, // 2
3314 THREAD_PRIORITY_BELOW_NORMAL, // 3
3315 THREAD_PRIORITY_BELOW_NORMAL, // 4
3316 THREAD_PRIORITY_NORMAL, // 5 NormPriority
3317 THREAD_PRIORITY_ABOVE_NORMAL, // 6
3318 THREAD_PRIORITY_ABOVE_NORMAL, // 7
3319 THREAD_PRIORITY_HIGHEST, // 8
3320 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
3321 THREAD_PRIORITY_TIME_CRITICAL, // 10 MaxPriority
3322 THREAD_PRIORITY_TIME_CRITICAL // 11 CriticalPriority
3323 };
3324
3325 static int prio_init() {
3326 // If ThreadPriorityPolicy is 1, switch tables
3327 if (ThreadPriorityPolicy == 1) {
3328 int i;
3329 for (i = 0; i < CriticalPriority + 1; i++) {
3330 os::java_to_os_priority[i] = prio_policy1[i];
3331 }
3332 }
3333 if (UseCriticalJavaThreadPriority) {
3334 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority] ;
3335 }
3336 return 0;
3337 }
3338
3339 OSReturn os::set_native_priority(Thread* thread, int priority) {
3340 if (!UseThreadPriorities) return OS_OK;
3341 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0;
3342 return ret ? OS_OK : OS_ERR;
3343 }
3344
3345 OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) {
3346 if ( !UseThreadPriorities ) {
3347 *priority_ptr = java_to_os_priority[NormPriority];
3348 return OS_OK;
3349 }
3350 int os_prio = GetThreadPriority(thread->osthread()->thread_handle());
3351 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) {
3352 assert(false, "GetThreadPriority failed");
3353 return OS_ERR;
3354 }
3355 *priority_ptr = os_prio;
3356 return OS_OK;
3357 }
3358
3359
3360 // Hint to the underlying OS that a task switch would not be good.
3361 // Void return because it's a hint and can fail.
3362 void os::hint_no_preempt() {}
3363
3364 void os::interrupt(Thread* thread) {
3365 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
3366 "possibility of dangling Thread pointer");
3367
3368 OSThread* osthread = thread->osthread();
3369 osthread->set_interrupted(true);
3370 // More than one thread can get here with the same value of osthread,
3371 // resulting in multiple notifications. We do, however, want the store
3372 // to interrupted() to be visible to other threads before we post
3373 // the interrupt event.
3374 OrderAccess::release();
3375 SetEvent(osthread->interrupt_event());
3376 // For JSR166: unpark after setting status
3377 if (thread->is_Java_thread())
3378 ((JavaThread*)thread)->parker()->unpark();
3379
3380 ParkEvent * ev = thread->_ParkEvent ;
3381 if (ev != NULL) ev->unpark() ;
3382
3383 }
3384
3385
3386 bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
3387 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
3388 "possibility of dangling Thread pointer");
3389
3390 OSThread* osthread = thread->osthread();
3391 bool interrupted = osthread->interrupted();
3392 // There is no synchronization between the setting of the interrupt
3393 // and it being cleared here. It is critical - see 6535709 - that
3394 // we only clear the interrupt state, and reset the interrupt event,
3395 // if we are going to report that we were indeed interrupted - else
3396 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups
3397 // depending on the timing
3398 if (interrupted && clear_interrupted) {
3399 osthread->set_interrupted(false);
3400 ResetEvent(osthread->interrupt_event());
3401 } // Otherwise leave the interrupted state alone
3402
3403 return interrupted;
3404 }
3405
3406 // Get's a pc (hint) for a running thread. Currently used only for profiling.
3407 ExtendedPC os::get_thread_pc(Thread* thread) {
3408 CONTEXT context;
3409 context.ContextFlags = CONTEXT_CONTROL;
3410 HANDLE handle = thread->osthread()->thread_handle();
3411 #ifdef _M_IA64
3412 assert(0, "Fix get_thread_pc");
3413 return ExtendedPC(NULL);
3414 #else
3415 if (GetThreadContext(handle, &context)) {
3416 #ifdef _M_AMD64
3417 return ExtendedPC((address) context.Rip);
3418 #else
3419 return ExtendedPC((address) context.Eip);
3420 #endif
3421 } else {
3422 return ExtendedPC(NULL);
3423 }
3424 #endif
3425 }
3426
3427 // GetCurrentThreadId() returns DWORD
3428 intx os::current_thread_id() { return GetCurrentThreadId(); }
3429
3430 static int _initial_pid = 0;
3431
3432 int os::current_process_id()
3433 {
3434 return (_initial_pid ? _initial_pid : _getpid());
3435 }
3436
3437 int os::win32::_vm_page_size = 0;
3438 int os::win32::_vm_allocation_granularity = 0;
3439 int os::win32::_processor_type = 0;
3440 // Processor level is not available on non-NT systems, use vm_version instead
3441 int os::win32::_processor_level = 0;
3442 julong os::win32::_physical_memory = 0;
3443 size_t os::win32::_default_stack_size = 0;
3444
3445 intx os::win32::_os_thread_limit = 0;
3446 volatile intx os::win32::_os_thread_count = 0;
3447
3448 bool os::win32::_is_nt = false;
3449 bool os::win32::_is_windows_2003 = false;
3450 bool os::win32::_is_windows_server = false;
3451
3452 void os::win32::initialize_system_info() {
3453 SYSTEM_INFO si;
3454 GetSystemInfo(&si);
3455 _vm_page_size = si.dwPageSize;
3456 _vm_allocation_granularity = si.dwAllocationGranularity;
3457 _processor_type = si.dwProcessorType;
3458 _processor_level = si.wProcessorLevel;
3459 set_processor_count(si.dwNumberOfProcessors);
3460
3461 MEMORYSTATUSEX ms;
3462 ms.dwLength = sizeof(ms);
3463
3464 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual,
3465 // dwMemoryLoad (% of memory in use)
3466 GlobalMemoryStatusEx(&ms);
3467 _physical_memory = ms.ullTotalPhys;
3468
3469 OSVERSIONINFOEX oi;
3470 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
3471 GetVersionEx((OSVERSIONINFO*)&oi);
3472 switch(oi.dwPlatformId) {
3473 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break;
3474 case VER_PLATFORM_WIN32_NT:
3475 _is_nt = true;
3476 {
3477 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion;
3478 if (os_vers == 5002) {
3479 _is_windows_2003 = true;
3480 }
3481 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER ||
3482 oi.wProductType == VER_NT_SERVER) {
3483 _is_windows_server = true;
3484 }
3485 }
3486 break;
3487 default: fatal("Unknown platform");
3488 }
3489
3490 _default_stack_size = os::current_stack_size();
3491 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size");
3492 assert((_default_stack_size & (_vm_page_size - 1)) == 0,
3493 "stack size not a multiple of page size");
3494
3495 initialize_performance_counter();
3496
3497 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is
3498 // known to deadlock the system, if the VM issues to thread operations with
3499 // a too high frequency, e.g., such as changing the priorities.
3500 // The 6000 seems to work well - no deadlocks has been notices on the test
3501 // programs that we have seen experience this problem.
3502 if (!os::win32::is_nt()) {
3503 StarvationMonitorInterval = 6000;
3504 }
3505 }
3506
3507
3508 HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) {
3509 char path[MAX_PATH];
3510 DWORD size;
3511 DWORD pathLen = (DWORD)sizeof(path);
3512 HINSTANCE result = NULL;
3513
3514 // only allow library name without path component
3515 assert(strchr(name, '\\') == NULL, "path not allowed");
3516 assert(strchr(name, ':') == NULL, "path not allowed");
3517 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) {
3518 jio_snprintf(ebuf, ebuflen,
3519 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name);
3520 return NULL;
3521 }
3522
3523 // search system directory
3524 if ((size = GetSystemDirectory(path, pathLen)) > 0) {
3525 strcat(path, "\\");
3526 strcat(path, name);
3527 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
3528 return result;
3529 }
3530 }
3531
3532 // try Windows directory
3533 if ((size = GetWindowsDirectory(path, pathLen)) > 0) {
3534 strcat(path, "\\");
3535 strcat(path, name);
3536 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
3537 return result;
3538 }
3539 }
3540
3541 jio_snprintf(ebuf, ebuflen,
3542 "os::win32::load_windows_dll() cannot load %s from system directories.", name);
3543 return NULL;
3544 }
3545
3546 void os::win32::setmode_streams() {
3547 _setmode(_fileno(stdin), _O_BINARY);
3548 _setmode(_fileno(stdout), _O_BINARY);
3549 _setmode(_fileno(stderr), _O_BINARY);
3550 }
3551
3552
3553 bool os::is_debugger_attached() {
3554 return IsDebuggerPresent() ? true : false;
3555 }
3556
3557
3558 void os::wait_for_keypress_at_exit(void) {
3559 if (PauseAtExit) {
3560 fprintf(stderr, "Press any key to continue...\n");
3561 fgetc(stdin);
3562 }
3563 }
3564
3565
3566 int os::message_box(const char* title, const char* message) {
3567 int result = MessageBox(NULL, message, title,
3568 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY);
3569 return result == IDYES;
3570 }
3571
3572 int os::allocate_thread_local_storage() {
3573 return TlsAlloc();
3574 }
3575
3576
3577 void os::free_thread_local_storage(int index) {
3578 TlsFree(index);
3579 }
3580
3581
3582 void os::thread_local_storage_at_put(int index, void* value) {
3583 TlsSetValue(index, value);
3584 assert(thread_local_storage_at(index) == value, "Just checking");
3585 }
3586
3587
3588 void* os::thread_local_storage_at(int index) {
3589 return TlsGetValue(index);
3590 }
3591
3592
3593 #ifndef PRODUCT
3594 #ifndef _WIN64
3595 // Helpers to check whether NX protection is enabled
3596 int nx_exception_filter(_EXCEPTION_POINTERS *pex) {
3597 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
3598 pex->ExceptionRecord->NumberParameters > 0 &&
3599 pex->ExceptionRecord->ExceptionInformation[0] ==
3600 EXCEPTION_INFO_EXEC_VIOLATION) {
3601 return EXCEPTION_EXECUTE_HANDLER;
3602 }
3603 return EXCEPTION_CONTINUE_SEARCH;
3604 }
3605
3606 void nx_check_protection() {
3607 // If NX is enabled we'll get an exception calling into code on the stack
3608 char code[] = { (char)0xC3 }; // ret
3609 void *code_ptr = (void *)code;
3610 __try {
3611 __asm call code_ptr
3612 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) {
3613 tty->print_raw_cr("NX protection detected.");
3614 }
3615 }
3616 #endif // _WIN64
3617 #endif // PRODUCT
3618
3619 // this is called _before_ the global arguments have been parsed
3620 void os::init(void) {
3621 _initial_pid = _getpid();
3622
3623 init_random(1234567);
3624
3625 win32::initialize_system_info();
3626 win32::setmode_streams();
3627 init_page_sizes((size_t) win32::vm_page_size());
3628
3629 // For better scalability on MP systems (must be called after initialize_system_info)
3630 #ifndef PRODUCT
3631 if (is_MP()) {
3632 NoYieldsInMicrolock = true;
3633 }
3634 #endif
3635 // This may be overridden later when argument processing is done.
3636 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation,
3637 os::win32::is_windows_2003());
3638
3639 // Initialize main_process and main_thread
3640 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle
3641 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process,
3642 &main_thread, THREAD_ALL_ACCESS, false, 0)) {
3643 fatal("DuplicateHandle failed\n");
3644 }
3645 main_thread_id = (int) GetCurrentThreadId();
3646 }
3647
3648 // To install functions for atexit processing
3649 extern "C" {
3650 static void perfMemory_exit_helper() {
3651 perfMemory_exit();
3652 }
3653 }
3654
3655 // this is called _after_ the global arguments have been parsed
3656 jint os::init_2(void) {
3657 // Allocate a single page and mark it as readable for safepoint polling
3658 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY);
3659 guarantee( polling_page != NULL, "Reserve Failed for polling page");
3660
3661 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY);
3662 guarantee( return_page != NULL, "Commit Failed for polling page");
3663
3664 os::set_polling_page( polling_page );
3665
3666 #ifndef PRODUCT
3667 if( Verbose && PrintMiscellaneous )
3668 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
3669 #endif
3670
3671 if (!UseMembar) {
3672 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
3673 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
3674
3675 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
3676 guarantee( return_page != NULL, "Commit Failed for memory serialize page");
3677
3678 os::set_memory_serialize_page( mem_serialize_page );
3679
3680 #ifndef PRODUCT
3681 if(Verbose && PrintMiscellaneous)
3682 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
3683 #endif
3684 }
3685
3686 os::large_page_init();
3687
3688 // Setup Windows Exceptions
3689
3690 // for debugging float code generation bugs
3691 if (ForceFloatExceptions) {
3692 #ifndef _WIN64
3693 static long fp_control_word = 0;
3694 __asm { fstcw fp_control_word }
3695 // see Intel PPro Manual, Vol. 2, p 7-16
3696 const long precision = 0x20;
3697 const long underflow = 0x10;
3698 const long overflow = 0x08;
3699 const long zero_div = 0x04;
3700 const long denorm = 0x02;
3701 const long invalid = 0x01;
3702 fp_control_word |= invalid;
3703 __asm { fldcw fp_control_word }
3704 #endif
3705 }
3706
3707 // If stack_commit_size is 0, windows will reserve the default size,
3708 // but only commit a small portion of it.
3709 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size());
3710 size_t default_reserve_size = os::win32::default_stack_size();
3711 size_t actual_reserve_size = stack_commit_size;
3712 if (stack_commit_size < default_reserve_size) {
3713 // If stack_commit_size == 0, we want this too
3714 actual_reserve_size = default_reserve_size;
3715 }
3716
3717 // Check minimum allowable stack size for thread creation and to initialize
3718 // the java system classes, including StackOverflowError - depends on page
3719 // size. Add a page for compiler2 recursion in main thread.
3720 // Add in 2*BytesPerWord times page size to account for VM stack during
3721 // class initialization depending on 32 or 64 bit VM.
3722 size_t min_stack_allowed =
3723 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
3724 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size();
3725 if (actual_reserve_size < min_stack_allowed) {
3726 tty->print_cr("\nThe stack size specified is too small, "
3727 "Specify at least %dk",
3728 min_stack_allowed / K);
3729 return JNI_ERR;
3730 }
3731
3732 JavaThread::set_stack_size_at_create(stack_commit_size);
3733
3734 // Calculate theoretical max. size of Threads to guard gainst artifical
3735 // out-of-memory situations, where all available address-space has been
3736 // reserved by thread stacks.
3737 assert(actual_reserve_size != 0, "Must have a stack");
3738
3739 // Calculate the thread limit when we should start doing Virtual Memory
3740 // banging. Currently when the threads will have used all but 200Mb of space.
3741 //
3742 // TODO: consider performing a similar calculation for commit size instead
3743 // as reserve size, since on a 64-bit platform we'll run into that more
3744 // often than running out of virtual memory space. We can use the
3745 // lower value of the two calculations as the os_thread_limit.
3746 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K);
3747 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size);
3748
3749 // at exit methods are called in the reverse order of their registration.
3750 // there is no limit to the number of functions registered. atexit does
3751 // not set errno.
3752
3753 if (PerfAllowAtExitRegistration) {
3754 // only register atexit functions if PerfAllowAtExitRegistration is set.
3755 // atexit functions can be delayed until process exit time, which
3756 // can be problematic for embedded VM situations. Embedded VMs should
3757 // call DestroyJavaVM() to assure that VM resources are released.
3758
3759 // note: perfMemory_exit_helper atexit function may be removed in
3760 // the future if the appropriate cleanup code can be added to the
3761 // VM_Exit VMOperation's doit method.
3762 if (atexit(perfMemory_exit_helper) != 0) {
3763 warning("os::init_2 atexit(perfMemory_exit_helper) failed");
3764 }
3765 }
3766
3767 #ifndef _WIN64
3768 // Print something if NX is enabled (win32 on AMD64)
3769 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection());
3770 #endif
3771
3772 // initialize thread priority policy
3773 prio_init();
3774
3775 if (UseNUMA && !ForceNUMA) {
3776 UseNUMA = false; // We don't fully support this yet
3777 }
3778
3779 if (UseNUMAInterleaving) {
3780 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag
3781 bool success = numa_interleaving_init();
3782 if (!success) UseNUMAInterleaving = false;
3783 }
3784
3785 return JNI_OK;
3786 }
3787
3788 void os::init_3(void) {
3789 return;
3790 }
3791
3792 // Mark the polling page as unreadable
3793 void os::make_polling_page_unreadable(void) {
3794 DWORD old_status;
3795 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) )
3796 fatal("Could not disable polling page");
3797 };
3798
3799 // Mark the polling page as readable
3800 void os::make_polling_page_readable(void) {
3801 DWORD old_status;
3802 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) )
3803 fatal("Could not enable polling page");
3804 };
3805
3806
3807 int os::stat(const char *path, struct stat *sbuf) {
3808 char pathbuf[MAX_PATH];
3809 if (strlen(path) > MAX_PATH - 1) {
3810 errno = ENAMETOOLONG;
3811 return -1;
3812 }
3813 os::native_path(strcpy(pathbuf, path));
3814 int ret = ::stat(pathbuf, sbuf);
3815 if (sbuf != NULL && UseUTCFileTimestamp) {
3816 // Fix for 6539723. st_mtime returned from stat() is dependent on
3817 // the system timezone and so can return different values for the
3818 // same file if/when daylight savings time changes. This adjustment
3819 // makes sure the same timestamp is returned regardless of the TZ.
3820 //
3821 // See:
3822 // http://msdn.microsoft.com/library/
3823 // default.asp?url=/library/en-us/sysinfo/base/
3824 // time_zone_information_str.asp
3825 // and
3826 // http://msdn.microsoft.com/library/default.asp?url=
3827 // /library/en-us/sysinfo/base/settimezoneinformation.asp
3828 //
3829 // NOTE: there is a insidious bug here: If the timezone is changed
3830 // after the call to stat() but before 'GetTimeZoneInformation()', then
3831 // the adjustment we do here will be wrong and we'll return the wrong
3832 // value (which will likely end up creating an invalid class data
3833 // archive). Absent a better API for this, or some time zone locking
3834 // mechanism, we'll have to live with this risk.
3835 TIME_ZONE_INFORMATION tz;
3836 DWORD tzid = GetTimeZoneInformation(&tz);
3837 int daylightBias =
3838 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias;
3839 sbuf->st_mtime += (tz.Bias + daylightBias) * 60;
3840 }
3841 return ret;
3842 }
3843
3844
3845 #define FT2INT64(ft) \
3846 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime))
3847
3848
3849 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
3850 // are used by JVM M&M and JVMTI to get user+sys or user CPU time
3851 // of a thread.
3852 //
3853 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns
3854 // the fast estimate available on the platform.
3855
3856 // current_thread_cpu_time() is not optimized for Windows yet
3857 jlong os::current_thread_cpu_time() {
3858 // return user + sys since the cost is the same
3859 return os::thread_cpu_time(Thread::current(), true /* user+sys */);
3860 }
3861
3862 jlong os::thread_cpu_time(Thread* thread) {
3863 // consistent with what current_thread_cpu_time() returns.
3864 return os::thread_cpu_time(thread, true /* user+sys */);
3865 }
3866
3867 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
3868 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
3869 }
3870
3871 jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) {
3872 // This code is copy from clasic VM -> hpi::sysThreadCPUTime
3873 // If this function changes, os::is_thread_cpu_time_supported() should too
3874 if (os::win32::is_nt()) {
3875 FILETIME CreationTime;
3876 FILETIME ExitTime;
3877 FILETIME KernelTime;
3878 FILETIME UserTime;
3879
3880 if ( GetThreadTimes(thread->osthread()->thread_handle(),
3881 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
3882 return -1;
3883 else
3884 if (user_sys_cpu_time) {
3885 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100;
3886 } else {
3887 return FT2INT64(UserTime) * 100;
3888 }
3889 } else {
3890 return (jlong) timeGetTime() * 1000000;
3891 }
3892 }
3893
3894 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
3895 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
3896 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
3897 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
3898 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
3899 }
3900
3901 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
3902 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
3903 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
3904 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
3905 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
3906 }
3907
3908 bool os::is_thread_cpu_time_supported() {
3909 // see os::thread_cpu_time
3910 if (os::win32::is_nt()) {
3911 FILETIME CreationTime;
3912 FILETIME ExitTime;
3913 FILETIME KernelTime;
3914 FILETIME UserTime;
3915
3916 if ( GetThreadTimes(GetCurrentThread(),
3917 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
3918 return false;
3919 else
3920 return true;
3921 } else {
3922 return false;
3923 }
3924 }
3925
3926 // Windows does't provide a loadavg primitive so this is stubbed out for now.
3927 // It does have primitives (PDH API) to get CPU usage and run queue length.
3928 // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length"
3929 // If we wanted to implement loadavg on Windows, we have a few options:
3930 //
3931 // a) Query CPU usage and run queue length and "fake" an answer by
3932 // returning the CPU usage if it's under 100%, and the run queue
3933 // length otherwise. It turns out that querying is pretty slow
3934 // on Windows, on the order of 200 microseconds on a fast machine.
3935 // Note that on the Windows the CPU usage value is the % usage
3936 // since the last time the API was called (and the first call
3937 // returns 100%), so we'd have to deal with that as well.
3938 //
3939 // b) Sample the "fake" answer using a sampling thread and store
3940 // the answer in a global variable. The call to loadavg would
3941 // just return the value of the global, avoiding the slow query.
3942 //
3943 // c) Sample a better answer using exponential decay to smooth the
3944 // value. This is basically the algorithm used by UNIX kernels.
3945 //
3946 // Note that sampling thread starvation could affect both (b) and (c).
3947 int os::loadavg(double loadavg[], int nelem) {
3948 return -1;
3949 }
3950
3951
3952 // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield()
3953 bool os::dont_yield() {
3954 return DontYieldALot;
3955 }
3956
3957 // This method is a slightly reworked copy of JDK's sysOpen
3958 // from src/windows/hpi/src/sys_api_md.c
3959
3960 int os::open(const char *path, int oflag, int mode) {
3961 char pathbuf[MAX_PATH];
3962
3963 if (strlen(path) > MAX_PATH - 1) {
3964 errno = ENAMETOOLONG;
3965 return -1;
3966 }
3967 os::native_path(strcpy(pathbuf, path));
3968 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode);
3969 }
3970
3971 // Is a (classpath) directory empty?
3972 bool os::dir_is_empty(const char* path) {
3973 WIN32_FIND_DATA fd;
3974 HANDLE f = FindFirstFile(path, &fd);
3975 if (f == INVALID_HANDLE_VALUE) {
3976 return true;
3977 }
3978 FindClose(f);
3979 return false;
3980 }
3981
3982 // create binary file, rewriting existing file if required
3983 int os::create_binary_file(const char* path, bool rewrite_existing) {
3984 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY;
3985 if (!rewrite_existing) {
3986 oflags |= _O_EXCL;
3987 }
3988 return ::open(path, oflags, _S_IREAD | _S_IWRITE);
3989 }
3990
3991 // return current position of file pointer
3992 jlong os::current_file_offset(int fd) {
3993 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR);
3994 }
3995
3996 // move file pointer to the specified offset
3997 jlong os::seek_to_file_offset(int fd, jlong offset) {
3998 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET);
3999 }
4000
4001
4002 jlong os::lseek(int fd, jlong offset, int whence) {
4003 return (jlong) ::_lseeki64(fd, offset, whence);
4004 }
4005
4006 // This method is a slightly reworked copy of JDK's sysNativePath
4007 // from src/windows/hpi/src/path_md.c
4008
4009 /* Convert a pathname to native format. On win32, this involves forcing all
4010 separators to be '\\' rather than '/' (both are legal inputs, but Win95
4011 sometimes rejects '/') and removing redundant separators. The input path is
4012 assumed to have been converted into the character encoding used by the local
4013 system. Because this might be a double-byte encoding, care is taken to
4014 treat double-byte lead characters correctly.
4015
4016 This procedure modifies the given path in place, as the result is never
4017 longer than the original. There is no error return; this operation always
4018 succeeds. */
4019 char * os::native_path(char *path) {
4020 char *src = path, *dst = path, *end = path;
4021 char *colon = NULL; /* If a drive specifier is found, this will
4022 point to the colon following the drive
4023 letter */
4024
4025 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */
4026 assert(((!::IsDBCSLeadByte('/'))
4027 && (!::IsDBCSLeadByte('\\'))
4028 && (!::IsDBCSLeadByte(':'))),
4029 "Illegal lead byte");
4030
4031 /* Check for leading separators */
4032 #define isfilesep(c) ((c) == '/' || (c) == '\\')
4033 while (isfilesep(*src)) {
4034 src++;
4035 }
4036
4037 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') {
4038 /* Remove leading separators if followed by drive specifier. This
4039 hack is necessary to support file URLs containing drive
4040 specifiers (e.g., "file://c:/path"). As a side effect,
4041 "/c:/path" can be used as an alternative to "c:/path". */
4042 *dst++ = *src++;
4043 colon = dst;
4044 *dst++ = ':';
4045 src++;
4046 } else {
4047 src = path;
4048 if (isfilesep(src[0]) && isfilesep(src[1])) {
4049 /* UNC pathname: Retain first separator; leave src pointed at
4050 second separator so that further separators will be collapsed
4051 into the second separator. The result will be a pathname
4052 beginning with "\\\\" followed (most likely) by a host name. */
4053 src = dst = path + 1;
4054 path[0] = '\\'; /* Force first separator to '\\' */
4055 }
4056 }
4057
4058 end = dst;
4059
4060 /* Remove redundant separators from remainder of path, forcing all
4061 separators to be '\\' rather than '/'. Also, single byte space
4062 characters are removed from the end of the path because those
4063 are not legal ending characters on this operating system.
4064 */
4065 while (*src != '\0') {
4066 if (isfilesep(*src)) {
4067 *dst++ = '\\'; src++;
4068 while (isfilesep(*src)) src++;
4069 if (*src == '\0') {
4070 /* Check for trailing separator */
4071 end = dst;
4072 if (colon == dst - 2) break; /* "z:\\" */
4073 if (dst == path + 1) break; /* "\\" */
4074 if (dst == path + 2 && isfilesep(path[0])) {
4075 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the
4076 beginning of a UNC pathname. Even though it is not, by
4077 itself, a valid UNC pathname, we leave it as is in order
4078 to be consistent with the path canonicalizer as well
4079 as the win32 APIs, which treat this case as an invalid
4080 UNC pathname rather than as an alias for the root
4081 directory of the current drive. */
4082 break;
4083 }
4084 end = --dst; /* Path does not denote a root directory, so
4085 remove trailing separator */
4086 break;
4087 }
4088 end = dst;
4089 } else {
4090 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */
4091 *dst++ = *src++;
4092 if (*src) *dst++ = *src++;
4093 end = dst;
4094 } else { /* Copy a single-byte character */
4095 char c = *src++;
4096 *dst++ = c;
4097 /* Space is not a legal ending character */
4098 if (c != ' ') end = dst;
4099 }
4100 }
4101 }
4102
4103 *end = '\0';
4104
4105 /* For "z:", add "." to work around a bug in the C runtime library */
4106 if (colon == dst - 1) {
4107 path[2] = '.';
4108 path[3] = '\0';
4109 }
4110
4111 #ifdef DEBUG
4112 jio_fprintf(stderr, "sysNativePath: %s\n", path);
4113 #endif DEBUG
4114 return path;
4115 }
4116
4117 // This code is a copy of JDK's sysSetLength
4118 // from src/windows/hpi/src/sys_api_md.c
4119
4120 int os::ftruncate(int fd, jlong length) {
4121 HANDLE h = (HANDLE)::_get_osfhandle(fd);
4122 long high = (long)(length >> 32);
4123 DWORD ret;
4124
4125 if (h == (HANDLE)(-1)) {
4126 return -1;
4127 }
4128
4129 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN);
4130 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) {
4131 return -1;
4132 }
4133
4134 if (::SetEndOfFile(h) == FALSE) {
4135 return -1;
4136 }
4137
4138 return 0;
4139 }
4140
4141
4142 // This code is a copy of JDK's sysSync
4143 // from src/windows/hpi/src/sys_api_md.c
4144 // except for the legacy workaround for a bug in Win 98
4145
4146 int os::fsync(int fd) {
4147 HANDLE handle = (HANDLE)::_get_osfhandle(fd);
4148
4149 if ( (!::FlushFileBuffers(handle)) &&
4150 (GetLastError() != ERROR_ACCESS_DENIED) ) {
4151 /* from winerror.h */
4152 return -1;
4153 }
4154 return 0;
4155 }
4156
4157 static int nonSeekAvailable(int, long *);
4158 static int stdinAvailable(int, long *);
4159
4160 #define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR)
4161 #define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO)
4162
4163 // This code is a copy of JDK's sysAvailable
4164 // from src/windows/hpi/src/sys_api_md.c
4165
4166 int os::available(int fd, jlong *bytes) {
4167 jlong cur, end;
4168 struct _stati64 stbuf64;
4169
4170 if (::_fstati64(fd, &stbuf64) >= 0) {
4171 int mode = stbuf64.st_mode;
4172 if (S_ISCHR(mode) || S_ISFIFO(mode)) {
4173 int ret;
4174 long lpbytes;
4175 if (fd == 0) {
4176 ret = stdinAvailable(fd, &lpbytes);
4177 } else {
4178 ret = nonSeekAvailable(fd, &lpbytes);
4179 }
4180 (*bytes) = (jlong)(lpbytes);
4181 return ret;
4182 }
4183 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) {
4184 return FALSE;
4185 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) {
4186 return FALSE;
4187 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) {
4188 return FALSE;
4189 }
4190 *bytes = end - cur;
4191 return TRUE;
4192 } else {
4193 return FALSE;
4194 }
4195 }
4196
4197 // This code is a copy of JDK's nonSeekAvailable
4198 // from src/windows/hpi/src/sys_api_md.c
4199
4200 static int nonSeekAvailable(int fd, long *pbytes) {
4201 /* This is used for available on non-seekable devices
4202 * (like both named and anonymous pipes, such as pipes
4203 * connected to an exec'd process).
4204 * Standard Input is a special case.
4205 *
4206 */
4207 HANDLE han;
4208
4209 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) {
4210 return FALSE;
4211 }
4212
4213 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) {
4214 /* PeekNamedPipe fails when at EOF. In that case we
4215 * simply make *pbytes = 0 which is consistent with the
4216 * behavior we get on Solaris when an fd is at EOF.
4217 * The only alternative is to raise an Exception,
4218 * which isn't really warranted.
4219 */
4220 if (::GetLastError() != ERROR_BROKEN_PIPE) {
4221 return FALSE;
4222 }
4223 *pbytes = 0;
4224 }
4225 return TRUE;
4226 }
4227
4228 #define MAX_INPUT_EVENTS 2000
4229
4230 // This code is a copy of JDK's stdinAvailable
4231 // from src/windows/hpi/src/sys_api_md.c
4232
4233 static int stdinAvailable(int fd, long *pbytes) {
4234 HANDLE han;
4235 DWORD numEventsRead = 0; /* Number of events read from buffer */
4236 DWORD numEvents = 0; /* Number of events in buffer */
4237 DWORD i = 0; /* Loop index */
4238 DWORD curLength = 0; /* Position marker */
4239 DWORD actualLength = 0; /* Number of bytes readable */
4240 BOOL error = FALSE; /* Error holder */
4241 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */
4242
4243 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
4244 return FALSE;
4245 }
4246
4247 /* Construct an array of input records in the console buffer */
4248 error = ::GetNumberOfConsoleInputEvents(han, &numEvents);
4249 if (error == 0) {
4250 return nonSeekAvailable(fd, pbytes);
4251 }
4252
4253 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */
4254 if (numEvents > MAX_INPUT_EVENTS) {
4255 numEvents = MAX_INPUT_EVENTS;
4256 }
4257
4258 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD), mtInternal);
4259 if (lpBuffer == NULL) {
4260 return FALSE;
4261 }
4262
4263 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead);
4264 if (error == 0) {
4265 os::free(lpBuffer, mtInternal);
4266 return FALSE;
4267 }
4268
4269 /* Examine input records for the number of bytes available */
4270 for(i=0; i<numEvents; i++) {
4271 if (lpBuffer[i].EventType == KEY_EVENT) {
4272
4273 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *)
4274 &(lpBuffer[i].Event);
4275 if (keyRecord->bKeyDown == TRUE) {
4276 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar);
4277 curLength++;
4278 if (*keyPressed == '\r') {
4279 actualLength = curLength;
4280 }
4281 }
4282 }
4283 }
4284
4285 if(lpBuffer != NULL) {
4286 os::free(lpBuffer, mtInternal);
4287 }
4288
4289 *pbytes = (long) actualLength;
4290 return TRUE;
4291 }
4292
4293 // Map a block of memory.
4294 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
4295 char *addr, size_t bytes, bool read_only,
4296 bool allow_exec) {
4297 HANDLE hFile;
4298 char* base;
4299
4300 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
4301 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
4302 if (hFile == NULL) {
4303 if (PrintMiscellaneous && Verbose) {
4304 DWORD err = GetLastError();
4305 tty->print_cr("CreateFile() failed: GetLastError->%ld.");
4306 }
4307 return NULL;
4308 }
4309
4310 if (allow_exec) {
4311 // CreateFileMapping/MapViewOfFileEx can't map executable memory
4312 // unless it comes from a PE image (which the shared archive is not.)
4313 // Even VirtualProtect refuses to give execute access to mapped memory
4314 // that was not previously executable.
4315 //
4316 // Instead, stick the executable region in anonymous memory. Yuck.
4317 // Penalty is that ~4 pages will not be shareable - in the future
4318 // we might consider DLLizing the shared archive with a proper PE
4319 // header so that mapping executable + sharing is possible.
4320
4321 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE,
4322 PAGE_READWRITE);
4323 if (base == NULL) {
4324 if (PrintMiscellaneous && Verbose) {
4325 DWORD err = GetLastError();
4326 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err);
4327 }
4328 CloseHandle(hFile);
4329 return NULL;
4330 }
4331
4332 DWORD bytes_read;
4333 OVERLAPPED overlapped;
4334 overlapped.Offset = (DWORD)file_offset;
4335 overlapped.OffsetHigh = 0;
4336 overlapped.hEvent = NULL;
4337 // ReadFile guarantees that if the return value is true, the requested
4338 // number of bytes were read before returning.
4339 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0;
4340 if (!res) {
4341 if (PrintMiscellaneous && Verbose) {
4342 DWORD err = GetLastError();
4343 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err);
4344 }
4345 release_memory(base, bytes);
4346 CloseHandle(hFile);
4347 return NULL;
4348 }
4349 } else {
4350 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0,
4351 NULL /*file_name*/);
4352 if (hMap == NULL) {
4353 if (PrintMiscellaneous && Verbose) {
4354 DWORD err = GetLastError();
4355 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.");
4356 }
4357 CloseHandle(hFile);
4358 return NULL;
4359 }
4360
4361 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY;
4362 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset,
4363 (DWORD)bytes, addr);
4364 if (base == NULL) {
4365 if (PrintMiscellaneous && Verbose) {
4366 DWORD err = GetLastError();
4367 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err);
4368 }
4369 CloseHandle(hMap);
4370 CloseHandle(hFile);
4371 return NULL;
4372 }
4373
4374 if (CloseHandle(hMap) == 0) {
4375 if (PrintMiscellaneous && Verbose) {
4376 DWORD err = GetLastError();
4377 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err);
4378 }
4379 CloseHandle(hFile);
4380 return base;
4381 }
4382 }
4383
4384 if (allow_exec) {
4385 DWORD old_protect;
4386 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE;
4387 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0;
4388
4389 if (!res) {
4390 if (PrintMiscellaneous && Verbose) {
4391 DWORD err = GetLastError();
4392 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err);
4393 }
4394 // Don't consider this a hard error, on IA32 even if the
4395 // VirtualProtect fails, we should still be able to execute
4396 CloseHandle(hFile);
4397 return base;
4398 }
4399 }
4400
4401 if (CloseHandle(hFile) == 0) {
4402 if (PrintMiscellaneous && Verbose) {
4403 DWORD err = GetLastError();
4404 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err);
4405 }
4406 return base;
4407 }
4408
4409 return base;
4410 }
4411
4412
4413 // Remap a block of memory.
4414 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
4415 char *addr, size_t bytes, bool read_only,
4416 bool allow_exec) {
4417 // This OS does not allow existing memory maps to be remapped so we
4418 // have to unmap the memory before we remap it.
4419 if (!os::unmap_memory(addr, bytes)) {
4420 return NULL;
4421 }
4422
4423 // There is a very small theoretical window between the unmap_memory()
4424 // call above and the map_memory() call below where a thread in native
4425 // code may be able to access an address that is no longer mapped.
4426
4427 return os::map_memory(fd, file_name, file_offset, addr, bytes,
4428 read_only, allow_exec);
4429 }
4430
4431
4432 // Unmap a block of memory.
4433 // Returns true=success, otherwise false.
4434
4435 bool os::pd_unmap_memory(char* addr, size_t bytes) {
4436 BOOL result = UnmapViewOfFile(addr);
4437 if (result == 0) {
4438 if (PrintMiscellaneous && Verbose) {
4439 DWORD err = GetLastError();
4440 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err);
4441 }
4442 return false;
4443 }
4444 return true;
4445 }
4446
4447 void os::pause() {
4448 char filename[MAX_PATH];
4449 if (PauseAtStartupFile && PauseAtStartupFile[0]) {
4450 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
4451 } else {
4452 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
4453 }
4454
4455 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
4456 if (fd != -1) {
4457 struct stat buf;
4458 ::close(fd);
4459 while (::stat(filename, &buf) == 0) {
4460 Sleep(100);
4461 }
4462 } else {
4463 jio_fprintf(stderr,
4464 "Could not open pause file '%s', continuing immediately.\n", filename);
4465 }
4466 }
4467
4468 // An Event wraps a win32 "CreateEvent" kernel handle.
4469 //
4470 // We have a number of choices regarding "CreateEvent" win32 handle leakage:
4471 //
4472 // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle
4473 // field, and call CloseHandle() on the win32 event handle. Unpark() would
4474 // need to be modified to tolerate finding a NULL (invalid) win32 event handle.
4475 // In addition, an unpark() operation might fetch the handle field, but the
4476 // event could recycle between the fetch and the SetEvent() operation.
4477 // SetEvent() would either fail because the handle was invalid, or inadvertently work,
4478 // as the win32 handle value had been recycled. In an ideal world calling SetEvent()
4479 // on an stale but recycled handle would be harmless, but in practice this might
4480 // confuse other non-Sun code, so it's not a viable approach.
4481 //
4482 // 2: Once a win32 event handle is associated with an Event, it remains associated
4483 // with the Event. The event handle is never closed. This could be construed
4484 // as handle leakage, but only up to the maximum # of threads that have been extant
4485 // at any one time. This shouldn't be an issue, as windows platforms typically
4486 // permit a process to have hundreds of thousands of open handles.
4487 //
4488 // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList
4489 // and release unused handles.
4490 //
4491 // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle.
4492 // It's not clear, however, that we wouldn't be trading one type of leak for another.
4493 //
4494 // 5. Use an RCU-like mechanism (Read-Copy Update).
4495 // Or perhaps something similar to Maged Michael's "Hazard pointers".
4496 //
4497 // We use (2).
4498 //
4499 // TODO-FIXME:
4500 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation.
4501 // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks
4502 // to recover from (or at least detect) the dreaded Windows 841176 bug.
4503 // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent
4504 // into a single win32 CreateEvent() handle.
4505 //
4506 // _Event transitions in park()
4507 // -1 => -1 : illegal
4508 // 1 => 0 : pass - return immediately
4509 // 0 => -1 : block
4510 //
4511 // _Event serves as a restricted-range semaphore :
4512 // -1 : thread is blocked
4513 // 0 : neutral - thread is running or ready
4514 // 1 : signaled - thread is running or ready
4515 //
4516 // Another possible encoding of _Event would be
4517 // with explicit "PARKED" and "SIGNALED" bits.
4518
4519 int os::PlatformEvent::park (jlong Millis) {
4520 guarantee (_ParkHandle != NULL , "Invariant") ;
4521 guarantee (Millis > 0 , "Invariant") ;
4522 int v ;
4523
4524 // CONSIDER: defer assigning a CreateEvent() handle to the Event until
4525 // the initial park() operation.
4526
4527 for (;;) {
4528 v = _Event ;
4529 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
4530 }
4531 guarantee ((v == 0) || (v == 1), "invariant") ;
4532 if (v != 0) return OS_OK ;
4533
4534 // Do this the hard way by blocking ...
4535 // TODO: consider a brief spin here, gated on the success of recent
4536 // spin attempts by this thread.
4537 //
4538 // We decompose long timeouts into series of shorter timed waits.
4539 // Evidently large timo values passed in WaitForSingleObject() are problematic on some
4540 // versions of Windows. See EventWait() for details. This may be superstition. Or not.
4541 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time
4542 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from
4543 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend
4544 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv ==
4545 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate
4546 // for the already waited time. This policy does not admit any new outcomes.
4547 // In the future, however, we might want to track the accumulated wait time and
4548 // adjust Millis accordingly if we encounter a spurious wakeup.
4549
4550 const int MAXTIMEOUT = 0x10000000 ;
4551 DWORD rv = WAIT_TIMEOUT ;
4552 while (_Event < 0 && Millis > 0) {
4553 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT)
4554 if (Millis > MAXTIMEOUT) {
4555 prd = MAXTIMEOUT ;
4556 }
4557 rv = ::WaitForSingleObject (_ParkHandle, prd) ;
4558 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ;
4559 if (rv == WAIT_TIMEOUT) {
4560 Millis -= prd ;
4561 }
4562 }
4563 v = _Event ;
4564 _Event = 0 ;
4565 OrderAccess::fence() ;
4566 // If we encounter a nearly simultanous timeout expiry and unpark()
4567 // we return OS_OK indicating we awoke via unpark().
4568 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however.
4569 return (v >= 0) ? OS_OK : OS_TIMEOUT ;
4570 }
4571
4572 void os::PlatformEvent::park () {
4573 guarantee (_ParkHandle != NULL, "Invariant") ;
4574 // Invariant: Only the thread associated with the Event/PlatformEvent
4575 // may call park().
4576 int v ;
4577 for (;;) {
4578 v = _Event ;
4579 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
4580 }
4581 guarantee ((v == 0) || (v == 1), "invariant") ;
4582 if (v != 0) return ;
4583
4584 // Do this the hard way by blocking ...
4585 // TODO: consider a brief spin here, gated on the success of recent
4586 // spin attempts by this thread.
4587 while (_Event < 0) {
4588 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ;
4589 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ;
4590 }
4591
4592 // Usually we'll find _Event == 0 at this point, but as
4593 // an optional optimization we clear it, just in case can
4594 // multiple unpark() operations drove _Event up to 1.
4595 _Event = 0 ;
4596 OrderAccess::fence() ;
4597 guarantee (_Event >= 0, "invariant") ;
4598 }
4599
4600 void os::PlatformEvent::unpark() {
4601 guarantee (_ParkHandle != NULL, "Invariant") ;
4602 int v ;
4603 for (;;) {
4604 v = _Event ; // Increment _Event if it's < 1.
4605 if (v > 0) {
4606 // If it's already signaled just return.
4607 // The LD of _Event could have reordered or be satisfied
4608 // by a read-aside from this processor's write buffer.
4609 // To avoid problems execute a barrier and then
4610 // ratify the value. A degenerate CAS() would also work.
4611 // Viz., CAS (v+0, &_Event, v) == v).
4612 OrderAccess::fence() ;
4613 if (_Event == v) return ;
4614 continue ;
4615 }
4616 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
4617 }
4618 if (v < 0) {
4619 ::SetEvent (_ParkHandle) ;
4620 }
4621 }
4622
4623
4624 // JSR166
4625 // -------------------------------------------------------
4626
4627 /*
4628 * The Windows implementation of Park is very straightforward: Basic
4629 * operations on Win32 Events turn out to have the right semantics to
4630 * use them directly. We opportunistically resuse the event inherited
4631 * from Monitor.
4632 */
4633
4634
4635 void Parker::park(bool isAbsolute, jlong time) {
4636 guarantee (_ParkEvent != NULL, "invariant") ;
4637 // First, demultiplex/decode time arguments
4638 if (time < 0) { // don't wait
4639 return;
4640 }
4641 else if (time == 0 && !isAbsolute) {
4642 time = INFINITE;
4643 }
4644 else if (isAbsolute) {
4645 time -= os::javaTimeMillis(); // convert to relative time
4646 if (time <= 0) // already elapsed
4647 return;
4648 }
4649 else { // relative
4650 time /= 1000000; // Must coarsen from nanos to millis
4651 if (time == 0) // Wait for the minimal time unit if zero
4652 time = 1;
4653 }
4654
4655 JavaThread* thread = (JavaThread*)(Thread::current());
4656 assert(thread->is_Java_thread(), "Must be JavaThread");
4657 JavaThread *jt = (JavaThread *)thread;
4658
4659 // Don't wait if interrupted or already triggered
4660 if (Thread::is_interrupted(thread, false) ||
4661 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) {
4662 ResetEvent(_ParkEvent);
4663 return;
4664 }
4665 else {
4666 ThreadBlockInVM tbivm(jt);
4667 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
4668 jt->set_suspend_equivalent();
4669
4670 WaitForSingleObject(_ParkEvent, time);
4671 ResetEvent(_ParkEvent);
4672
4673 // If externally suspended while waiting, re-suspend
4674 if (jt->handle_special_suspend_equivalent_condition()) {
4675 jt->java_suspend_self();
4676 }
4677 }
4678 }
4679
4680 void Parker::unpark() {
4681 guarantee (_ParkEvent != NULL, "invariant") ;
4682 SetEvent(_ParkEvent);
4683 }
4684
4685 // Run the specified command in a separate process. Return its exit value,
4686 // or -1 on failure (e.g. can't create a new process).
4687 int os::fork_and_exec(char* cmd) {
4688 STARTUPINFO si;
4689 PROCESS_INFORMATION pi;
4690
4691 memset(&si, 0, sizeof(si));
4692 si.cb = sizeof(si);
4693 memset(&pi, 0, sizeof(pi));
4694 BOOL rslt = CreateProcess(NULL, // executable name - use command line
4695 cmd, // command line
4696 NULL, // process security attribute
4697 NULL, // thread security attribute
4698 TRUE, // inherits system handles
4699 0, // no creation flags
4700 NULL, // use parent's environment block
4701 NULL, // use parent's starting directory
4702 &si, // (in) startup information
4703 &pi); // (out) process information
4704
4705 if (rslt) {
4706 // Wait until child process exits.
4707 WaitForSingleObject(pi.hProcess, INFINITE);
4708
4709 DWORD exit_code;
4710 GetExitCodeProcess(pi.hProcess, &exit_code);
4711
4712 // Close process and thread handles.
4713 CloseHandle(pi.hProcess);
4714 CloseHandle(pi.hThread);
4715
4716 return (int)exit_code;
4717 } else {
4718 return -1;
4719 }
4720 }
4721
4722 //--------------------------------------------------------------------------------------------------
4723 // Non-product code
4724
4725 static int mallocDebugIntervalCounter = 0;
4726 static int mallocDebugCounter = 0;
4727 bool os::check_heap(bool force) {
4728 if (++mallocDebugCounter < MallocVerifyStart && !force) return true;
4729 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) {
4730 // Note: HeapValidate executes two hardware breakpoints when it finds something
4731 // wrong; at these points, eax contains the address of the offending block (I think).
4732 // To get to the exlicit error message(s) below, just continue twice.
4733 HANDLE heap = GetProcessHeap();
4734 { HeapLock(heap);
4735 PROCESS_HEAP_ENTRY phe;
4736 phe.lpData = NULL;
4737 while (HeapWalk(heap, &phe) != 0) {
4738 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) &&
4739 !HeapValidate(heap, 0, phe.lpData)) {
4740 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter);
4741 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData);
4742 fatal("corrupted C heap");
4743 }
4744 }
4745 DWORD err = GetLastError();
4746 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) {
4747 fatal(err_msg("heap walk aborted with error %d", err));
4748 }
4749 HeapUnlock(heap);
4750 }
4751 mallocDebugIntervalCounter = 0;
4752 }
4753 return true;
4754 }
4755
4756
4757 bool os::find(address addr, outputStream* st) {
4758 // Nothing yet
4759 return false;
4760 }
4761
4762 LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) {
4763 DWORD exception_code = e->ExceptionRecord->ExceptionCode;
4764
4765 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
4766 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow();
4767 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord;
4768 address addr = (address) exceptionRecord->ExceptionInformation[1];
4769
4770 if (os::is_memory_serialize_page(thread, addr))
4771 return EXCEPTION_CONTINUE_EXECUTION;
4772 }
4773
4774 return EXCEPTION_CONTINUE_SEARCH;
4775 }
4776
4777 // We don't build a headless jre for Windows
4778 bool os::is_headless_jre() { return false; }
4779
4780
4781 typedef CRITICAL_SECTION mutex_t;
4782 #define mutexInit(m) InitializeCriticalSection(m)
4783 #define mutexDestroy(m) DeleteCriticalSection(m)
4784 #define mutexLock(m) EnterCriticalSection(m)
4785 #define mutexUnlock(m) LeaveCriticalSection(m)
4786
4787 static bool sock_initialized = FALSE;
4788 static mutex_t sockFnTableMutex;
4789
4790 static void initSock() {
4791 WSADATA wsadata;
4792
4793 if (!os::WinSock2Dll::WinSock2Available()) {
4794 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n",
4795 ::GetLastError());
4796 return;
4797 }
4798 if (sock_initialized == TRUE) return;
4799
4800 ::mutexInit(&sockFnTableMutex);
4801 ::mutexLock(&sockFnTableMutex);
4802 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) {
4803 jio_fprintf(stderr, "Could not initialize Winsock\n");
4804 }
4805 sock_initialized = TRUE;
4806 ::mutexUnlock(&sockFnTableMutex);
4807 }
4808
4809 struct hostent* os::get_host_by_name(char* name) {
4810 if (!sock_initialized) {
4811 initSock();
4812 }
4813 if (!os::WinSock2Dll::WinSock2Available()) {
4814 return NULL;
4815 }
4816 return (struct hostent*)os::WinSock2Dll::gethostbyname(name);
4817 }
4818
4819 int os::socket_close(int fd) {
4820 return ::closesocket(fd);
4821 }
4822
4823 int os::socket_available(int fd, jint *pbytes) {
4824 int ret = ::ioctlsocket(fd, FIONREAD, (u_long*)pbytes);
4825 return (ret < 0) ? 0 : 1;
4826 }
4827
4828 int os::socket(int domain, int type, int protocol) {
4829 return ::socket(domain, type, protocol);
4830 }
4831
4832 int os::listen(int fd, int count) {
4833 return ::listen(fd, count);
4834 }
4835
4836 int os::connect(int fd, struct sockaddr* him, socklen_t len) {
4837 return ::connect(fd, him, len);
4838 }
4839
4840 int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
4841 return ::accept(fd, him, len);
4842 }
4843
4844 int os::sendto(int fd, char* buf, size_t len, uint flags,
4845 struct sockaddr* to, socklen_t tolen) {
4846
4847 return ::sendto(fd, buf, (int)len, flags, to, tolen);
4848 }
4849
4850 int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags,
4851 sockaddr* from, socklen_t* fromlen) {
4852
4853 return ::recvfrom(fd, buf, (int)nBytes, flags, from, fromlen);
4854 }
4855
4856 int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
4857 return ::recv(fd, buf, (int)nBytes, flags);
4858 }
4859
4860 int os::send(int fd, char* buf, size_t nBytes, uint flags) {
4861 return ::send(fd, buf, (int)nBytes, flags);
4862 }
4863
4864 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
4865 return ::send(fd, buf, (int)nBytes, flags);
4866 }
4867
4868 int os::timeout(int fd, long timeout) {
4869 fd_set tbl;
4870 struct timeval t;
4871
4872 t.tv_sec = timeout / 1000;
4873 t.tv_usec = (timeout % 1000) * 1000;
4874
4875 tbl.fd_count = 1;
4876 tbl.fd_array[0] = fd;
4877
4878 return ::select(1, &tbl, 0, 0, &t);
4879 }
4880
4881 int os::get_host_name(char* name, int namelen) {
4882 return ::gethostname(name, namelen);
4883 }
4884
4885 int os::socket_shutdown(int fd, int howto) {
4886 return ::shutdown(fd, howto);
4887 }
4888
4889 int os::bind(int fd, struct sockaddr* him, socklen_t len) {
4890 return ::bind(fd, him, len);
4891 }
4892
4893 int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
4894 return ::getsockname(fd, him, len);
4895 }
4896
4897 int os::get_sock_opt(int fd, int level, int optname,
4898 char* optval, socklen_t* optlen) {
4899 return ::getsockopt(fd, level, optname, optval, optlen);
4900 }
4901
4902 int os::set_sock_opt(int fd, int level, int optname,
4903 const char* optval, socklen_t optlen) {
4904 return ::setsockopt(fd, level, optname, optval, optlen);
4905 }
4906
4907
4908 // Kernel32 API
4909 typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void);
4910 typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD);
4911 typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG);
4912 typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG);
4913 typedef USHORT (WINAPI* RtlCaptureStackBackTrace_Fn)(ULONG, ULONG, PVOID*, PULONG);
4914
4915 GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL;
4916 VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL;
4917 GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL;
4918 GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL;
4919 RtlCaptureStackBackTrace_Fn os::Kernel32Dll::_RtlCaptureStackBackTrace = NULL;
4920
4921
4922 BOOL os::Kernel32Dll::initialized = FALSE;
4923 SIZE_T os::Kernel32Dll::GetLargePageMinimum() {
4924 assert(initialized && _GetLargePageMinimum != NULL,
4925 "GetLargePageMinimumAvailable() not yet called");
4926 return _GetLargePageMinimum();
4927 }
4928
4929 BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() {
4930 if (!initialized) {
4931 initialize();
4932 }
4933 return _GetLargePageMinimum != NULL;
4934 }
4935
4936 BOOL os::Kernel32Dll::NumaCallsAvailable() {
4937 if (!initialized) {
4938 initialize();
4939 }
4940 return _VirtualAllocExNuma != NULL;
4941 }
4942
4943 LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) {
4944 assert(initialized && _VirtualAllocExNuma != NULL,
4945 "NUMACallsAvailable() not yet called");
4946
4947 return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node);
4948 }
4949
4950 BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) {
4951 assert(initialized && _GetNumaHighestNodeNumber != NULL,
4952 "NUMACallsAvailable() not yet called");
4953
4954 return _GetNumaHighestNodeNumber(ptr_highest_node_number);
4955 }
4956
4957 BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) {
4958 assert(initialized && _GetNumaNodeProcessorMask != NULL,
4959 "NUMACallsAvailable() not yet called");
4960
4961 return _GetNumaNodeProcessorMask(node, proc_mask);
4962 }
4963
4964 USHORT os::Kernel32Dll::RtlCaptureStackBackTrace(ULONG FrameToSkip,
4965 ULONG FrameToCapture, PVOID* BackTrace, PULONG BackTraceHash) {
4966 if (!initialized) {
4967 initialize();
4968 }
4969
4970 if (_RtlCaptureStackBackTrace != NULL) {
4971 return _RtlCaptureStackBackTrace(FrameToSkip, FrameToCapture,
4972 BackTrace, BackTraceHash);
4973 } else {
4974 return 0;
4975 }
4976 }
4977
4978 void os::Kernel32Dll::initializeCommon() {
4979 if (!initialized) {
4980 HMODULE handle = ::GetModuleHandle("Kernel32.dll");
4981 assert(handle != NULL, "Just check");
4982 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum");
4983 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma");
4984 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber");
4985 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask");
4986 _RtlCaptureStackBackTrace = (RtlCaptureStackBackTrace_Fn)::GetProcAddress(handle, "RtlCaptureStackBackTrace");
4987 initialized = TRUE;
4988 }
4989 }
4990
4991
4992
4993 #ifndef JDK6_OR_EARLIER
4994
4995 void os::Kernel32Dll::initialize() {
4996 initializeCommon();
4997 }
4998
4999
5000 // Kernel32 API
5001 inline BOOL os::Kernel32Dll::SwitchToThread() {
5002 return ::SwitchToThread();
5003 }
5004
5005 inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
5006 return true;
5007 }
5008
5009 // Help tools
5010 inline BOOL os::Kernel32Dll::HelpToolsAvailable() {
5011 return true;
5012 }
5013
5014 inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
5015 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
5016 }
5017
5018 inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5019 return ::Module32First(hSnapshot, lpme);
5020 }
5021
5022 inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5023 return ::Module32Next(hSnapshot, lpme);
5024 }
5025
5026
5027 inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
5028 return true;
5029 }
5030
5031 inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
5032 ::GetNativeSystemInfo(lpSystemInfo);
5033 }
5034
5035 // PSAPI API
5036 inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
5037 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
5038 }
5039
5040 inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
5041 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
5042 }
5043
5044 inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
5045 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
5046 }
5047
5048 inline BOOL os::PSApiDll::PSApiAvailable() {
5049 return true;
5050 }
5051
5052
5053 // WinSock2 API
5054 inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
5055 return ::WSAStartup(wVersionRequested, lpWSAData);
5056 }
5057
5058 inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
5059 return ::gethostbyname(name);
5060 }
5061
5062 inline BOOL os::WinSock2Dll::WinSock2Available() {
5063 return true;
5064 }
5065
5066 // Advapi API
5067 inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
5068 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
5069 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
5070 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
5071 BufferLength, PreviousState, ReturnLength);
5072 }
5073
5074 inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
5075 PHANDLE TokenHandle) {
5076 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
5077 }
5078
5079 inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
5080 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
5081 }
5082
5083 inline BOOL os::Advapi32Dll::AdvapiAvailable() {
5084 return true;
5085 }
5086
5087 #else
5088 // Kernel32 API
5089 typedef BOOL (WINAPI* SwitchToThread_Fn)(void);
5090 typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD);
5091 typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32);
5092 typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32);
5093 typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO);
5094
5095 SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL;
5096 CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL;
5097 Module32First_Fn os::Kernel32Dll::_Module32First = NULL;
5098 Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL;
5099 GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL;
5100
5101 void os::Kernel32Dll::initialize() {
5102 if (!initialized) {
5103 HMODULE handle = ::GetModuleHandle("Kernel32.dll");
5104 assert(handle != NULL, "Just check");
5105
5106 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread");
5107 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn)
5108 ::GetProcAddress(handle, "CreateToolhelp32Snapshot");
5109 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First");
5110 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next");
5111 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo");
5112 initializeCommon(); // resolve the functions that always need resolving
5113
5114 initialized = TRUE;
5115 }
5116 }
5117
5118 BOOL os::Kernel32Dll::SwitchToThread() {
5119 assert(initialized && _SwitchToThread != NULL,
5120 "SwitchToThreadAvailable() not yet called");
5121 return _SwitchToThread();
5122 }
5123
5124
5125 BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
5126 if (!initialized) {
5127 initialize();
5128 }
5129 return _SwitchToThread != NULL;
5130 }
5131
5132 // Help tools
5133 BOOL os::Kernel32Dll::HelpToolsAvailable() {
5134 if (!initialized) {
5135 initialize();
5136 }
5137 return _CreateToolhelp32Snapshot != NULL &&
5138 _Module32First != NULL &&
5139 _Module32Next != NULL;
5140 }
5141
5142 HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
5143 assert(initialized && _CreateToolhelp32Snapshot != NULL,
5144 "HelpToolsAvailable() not yet called");
5145
5146 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
5147 }
5148
5149 BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5150 assert(initialized && _Module32First != NULL,
5151 "HelpToolsAvailable() not yet called");
5152
5153 return _Module32First(hSnapshot, lpme);
5154 }
5155
5156 inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
5157 assert(initialized && _Module32Next != NULL,
5158 "HelpToolsAvailable() not yet called");
5159
5160 return _Module32Next(hSnapshot, lpme);
5161 }
5162
5163
5164 BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
5165 if (!initialized) {
5166 initialize();
5167 }
5168 return _GetNativeSystemInfo != NULL;
5169 }
5170
5171 void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
5172 assert(initialized && _GetNativeSystemInfo != NULL,
5173 "GetNativeSystemInfoAvailable() not yet called");
5174
5175 _GetNativeSystemInfo(lpSystemInfo);
5176 }
5177
5178 // PSAPI API
5179
5180
5181 typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD);
5182 typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);;
5183 typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD);
5184
5185 EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL;
5186 GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL;
5187 GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL;
5188 BOOL os::PSApiDll::initialized = FALSE;
5189
5190 void os::PSApiDll::initialize() {
5191 if (!initialized) {
5192 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0);
5193 if (handle != NULL) {
5194 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle,
5195 "EnumProcessModules");
5196 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle,
5197 "GetModuleFileNameExA");
5198 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle,
5199 "GetModuleInformation");
5200 }
5201 initialized = TRUE;
5202 }
5203 }
5204
5205
5206
5207 BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
5208 assert(initialized && _EnumProcessModules != NULL,
5209 "PSApiAvailable() not yet called");
5210 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
5211 }
5212
5213 DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
5214 assert(initialized && _GetModuleFileNameEx != NULL,
5215 "PSApiAvailable() not yet called");
5216 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
5217 }
5218
5219 BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
5220 assert(initialized && _GetModuleInformation != NULL,
5221 "PSApiAvailable() not yet called");
5222 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
5223 }
5224
5225 BOOL os::PSApiDll::PSApiAvailable() {
5226 if (!initialized) {
5227 initialize();
5228 }
5229 return _EnumProcessModules != NULL &&
5230 _GetModuleFileNameEx != NULL &&
5231 _GetModuleInformation != NULL;
5232 }
5233
5234
5235 // WinSock2 API
5236 typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA);
5237 typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...);
5238
5239 WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL;
5240 gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL;
5241 BOOL os::WinSock2Dll::initialized = FALSE;
5242
5243 void os::WinSock2Dll::initialize() {
5244 if (!initialized) {
5245 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0);
5246 if (handle != NULL) {
5247 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup");
5248 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname");
5249 }
5250 initialized = TRUE;
5251 }
5252 }
5253
5254
5255 BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
5256 assert(initialized && _WSAStartup != NULL,
5257 "WinSock2Available() not yet called");
5258 return _WSAStartup(wVersionRequested, lpWSAData);
5259 }
5260
5261 struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
5262 assert(initialized && _gethostbyname != NULL,
5263 "WinSock2Available() not yet called");
5264 return _gethostbyname(name);
5265 }
5266
5267 BOOL os::WinSock2Dll::WinSock2Available() {
5268 if (!initialized) {
5269 initialize();
5270 }
5271 return _WSAStartup != NULL &&
5272 _gethostbyname != NULL;
5273 }
5274
5275 typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
5276 typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE);
5277 typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID);
5278
5279 AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL;
5280 OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL;
5281 LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL;
5282 BOOL os::Advapi32Dll::initialized = FALSE;
5283
5284 void os::Advapi32Dll::initialize() {
5285 if (!initialized) {
5286 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0);
5287 if (handle != NULL) {
5288 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle,
5289 "AdjustTokenPrivileges");
5290 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle,
5291 "OpenProcessToken");
5292 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle,
5293 "LookupPrivilegeValueA");
5294 }
5295 initialized = TRUE;
5296 }
5297 }
5298
5299 BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
5300 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
5301 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
5302 assert(initialized && _AdjustTokenPrivileges != NULL,
5303 "AdvapiAvailable() not yet called");
5304 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
5305 BufferLength, PreviousState, ReturnLength);
5306 }
5307
5308 BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
5309 PHANDLE TokenHandle) {
5310 assert(initialized && _OpenProcessToken != NULL,
5311 "AdvapiAvailable() not yet called");
5312 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
5313 }
5314
5315 BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
5316 assert(initialized && _LookupPrivilegeValue != NULL,
5317 "AdvapiAvailable() not yet called");
5318 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
5319 }
5320
5321 BOOL os::Advapi32Dll::AdvapiAvailable() {
5322 if (!initialized) {
5323 initialize();
5324 }
5325 return _AdjustTokenPrivileges != NULL &&
5326 _OpenProcessToken != NULL &&
5327 _LookupPrivilegeValue != NULL;
5328 }
5329
5330 #endif