os_windows.cpp revision 3312:ec15e8f6e4f1
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 VectoredExceptions and IsDebuggerPresent 26#define _WIN32_WINNT 0x500 27 28// no precompiled headers 29#include "classfile/classLoader.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "code/icBuffer.hpp" 33#include "code/vtableStubs.hpp" 34#include "compiler/compileBroker.hpp" 35#include "interpreter/interpreter.hpp" 36#include "jvm_windows.h" 37#include "memory/allocation.inline.hpp" 38#include "memory/filemap.hpp" 39#include "mutex_windows.inline.hpp" 40#include "oops/oop.inline.hpp" 41#include "os_share_windows.hpp" 42#include "prims/jniFastGetField.hpp" 43#include "prims/jvm.h" 44#include "prims/jvm_misc.hpp" 45#include "runtime/arguments.hpp" 46#include "runtime/extendedPC.hpp" 47#include "runtime/globals.hpp" 48#include "runtime/interfaceSupport.hpp" 49#include "runtime/java.hpp" 50#include "runtime/javaCalls.hpp" 51#include "runtime/mutexLocker.hpp" 52#include "runtime/objectMonitor.hpp" 53#include "runtime/osThread.hpp" 54#include "runtime/perfMemory.hpp" 55#include "runtime/sharedRuntime.hpp" 56#include "runtime/statSampler.hpp" 57#include "runtime/stubRoutines.hpp" 58#include "runtime/threadCritical.hpp" 59#include "runtime/timer.hpp" 60#include "services/attachListener.hpp" 61#include "services/runtimeService.hpp" 62#include "thread_windows.inline.hpp" 63#include "utilities/decoder.hpp" 64#include "utilities/defaultStream.hpp" 65#include "utilities/events.hpp" 66#include "utilities/growableArray.hpp" 67#include "utilities/vmError.hpp" 68#ifdef TARGET_ARCH_x86 69# include "assembler_x86.inline.hpp" 70# include "nativeInst_x86.hpp" 71#endif 72#ifdef COMPILER1 73#include "c1/c1_Runtime1.hpp" 74#endif 75#ifdef COMPILER2 76#include "opto/runtime.hpp" 77#endif 78 79#ifdef _DEBUG 80#include <crtdbg.h> 81#endif 82 83 84#include <windows.h> 85#include <sys/types.h> 86#include <sys/stat.h> 87#include <sys/timeb.h> 88#include <objidl.h> 89#include <shlobj.h> 90 91#include <malloc.h> 92#include <signal.h> 93#include <direct.h> 94#include <errno.h> 95#include <fcntl.h> 96#include <io.h> 97#include <process.h> // For _beginthreadex(), _endthreadex() 98#include <imagehlp.h> // For os::dll_address_to_function_name 99 100/* for enumerating dll libraries */ 101#include <vdmdbg.h> 102 103// for timer info max values which include all bits 104#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 105 106// For DLL loading/load error detection 107// Values of PE COFF 108#define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c 109#define IMAGE_FILE_SIGNATURE_LENGTH 4 110 111static HANDLE main_process; 112static HANDLE main_thread; 113static int main_thread_id; 114 115static FILETIME process_creation_time; 116static FILETIME process_exit_time; 117static FILETIME process_user_time; 118static FILETIME process_kernel_time; 119 120#ifdef _WIN64 121PVOID topLevelVectoredExceptionHandler = NULL; 122#endif 123 124#ifdef _M_IA64 125#define __CPU__ ia64 126#elif _M_AMD64 127#define __CPU__ amd64 128#else 129#define __CPU__ i486 130#endif 131 132// save DLL module handle, used by GetModuleFileName 133 134HINSTANCE vm_lib_handle; 135 136BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { 137 switch (reason) { 138 case DLL_PROCESS_ATTACH: 139 vm_lib_handle = hinst; 140 if(ForceTimeHighResolution) 141 timeBeginPeriod(1L); 142 break; 143 case DLL_PROCESS_DETACH: 144 if(ForceTimeHighResolution) 145 timeEndPeriod(1L); 146#ifdef _WIN64 147 if (topLevelVectoredExceptionHandler != NULL) { 148 RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler); 149 topLevelVectoredExceptionHandler = NULL; 150 } 151#endif 152 break; 153 default: 154 break; 155 } 156 return true; 157} 158 159static inline double fileTimeAsDouble(FILETIME* time) { 160 const double high = (double) ((unsigned int) ~0); 161 const double split = 10000000.0; 162 double result = (time->dwLowDateTime / split) + 163 time->dwHighDateTime * (high/split); 164 return result; 165} 166 167// Implementation of os 168 169bool os::getenv(const char* name, char* buffer, int len) { 170 int result = GetEnvironmentVariable(name, buffer, len); 171 return result > 0 && result < len; 172} 173 174 175// No setuid programs under Windows. 176bool os::have_special_privileges() { 177 return false; 178} 179 180 181// This method is a periodic task to check for misbehaving JNI applications 182// under CheckJNI, we can add any periodic checks here. 183// For Windows at the moment does nothing 184void os::run_periodic_checks() { 185 return; 186} 187 188#ifndef _WIN64 189// previous UnhandledExceptionFilter, if there is one 190static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL; 191 192LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); 193#endif 194void os::init_system_properties_values() { 195 /* sysclasspath, java_home, dll_dir */ 196 { 197 char *home_path; 198 char *dll_path; 199 char *pslash; 200 char *bin = "\\bin"; 201 char home_dir[MAX_PATH]; 202 203 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { 204 os::jvm_path(home_dir, sizeof(home_dir)); 205 // Found the full path to jvm[_g].dll. 206 // Now cut the path to <java_home>/jre if we can. 207 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ 208 pslash = strrchr(home_dir, '\\'); 209 if (pslash != NULL) { 210 *pslash = '\0'; /* get rid of \{client|server} */ 211 pslash = strrchr(home_dir, '\\'); 212 if (pslash != NULL) 213 *pslash = '\0'; /* get rid of \bin */ 214 } 215 } 216 217 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1); 218 if (home_path == NULL) 219 return; 220 strcpy(home_path, home_dir); 221 Arguments::set_java_home(home_path); 222 223 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1); 224 if (dll_path == NULL) 225 return; 226 strcpy(dll_path, home_dir); 227 strcat(dll_path, bin); 228 Arguments::set_dll_dir(dll_path); 229 230 if (!set_boot_path('\\', ';')) 231 return; 232 } 233 234 /* library_path */ 235 #define EXT_DIR "\\lib\\ext" 236 #define BIN_DIR "\\bin" 237 #define PACKAGE_DIR "\\Sun\\Java" 238 { 239 /* Win32 library search order (See the documentation for LoadLibrary): 240 * 241 * 1. The directory from which application is loaded. 242 * 2. The system wide Java Extensions directory (Java only) 243 * 3. System directory (GetSystemDirectory) 244 * 4. Windows directory (GetWindowsDirectory) 245 * 5. The PATH environment variable 246 * 6. The current directory 247 */ 248 249 char *library_path; 250 char tmp[MAX_PATH]; 251 char *path_str = ::getenv("PATH"); 252 253 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + 254 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10); 255 256 library_path[0] = '\0'; 257 258 GetModuleFileName(NULL, tmp, sizeof(tmp)); 259 *(strrchr(tmp, '\\')) = '\0'; 260 strcat(library_path, tmp); 261 262 GetWindowsDirectory(tmp, sizeof(tmp)); 263 strcat(library_path, ";"); 264 strcat(library_path, tmp); 265 strcat(library_path, PACKAGE_DIR BIN_DIR); 266 267 GetSystemDirectory(tmp, sizeof(tmp)); 268 strcat(library_path, ";"); 269 strcat(library_path, tmp); 270 271 GetWindowsDirectory(tmp, sizeof(tmp)); 272 strcat(library_path, ";"); 273 strcat(library_path, tmp); 274 275 if (path_str) { 276 strcat(library_path, ";"); 277 strcat(library_path, path_str); 278 } 279 280 strcat(library_path, ";."); 281 282 Arguments::set_library_path(library_path); 283 FREE_C_HEAP_ARRAY(char, library_path); 284 } 285 286 /* Default extensions directory */ 287 { 288 char path[MAX_PATH]; 289 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; 290 GetWindowsDirectory(path, MAX_PATH); 291 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, 292 path, PACKAGE_DIR, EXT_DIR); 293 Arguments::set_ext_dirs(buf); 294 } 295 #undef EXT_DIR 296 #undef BIN_DIR 297 #undef PACKAGE_DIR 298 299 /* Default endorsed standards directory. */ 300 { 301 #define ENDORSED_DIR "\\lib\\endorsed" 302 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); 303 char * buf = NEW_C_HEAP_ARRAY(char, len); 304 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); 305 Arguments::set_endorsed_dirs(buf); 306 #undef ENDORSED_DIR 307 } 308 309#ifndef _WIN64 310 // set our UnhandledExceptionFilter and save any previous one 311 prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception); 312#endif 313 314 // Done 315 return; 316} 317 318void os::breakpoint() { 319 DebugBreak(); 320} 321 322// Invoked from the BREAKPOINT Macro 323extern "C" void breakpoint() { 324 os::breakpoint(); 325} 326 327// os::current_stack_base() 328// 329// Returns the base of the stack, which is the stack's 330// starting address. This function must be called 331// while running on the stack of the thread being queried. 332 333address os::current_stack_base() { 334 MEMORY_BASIC_INFORMATION minfo; 335 address stack_bottom; 336 size_t stack_size; 337 338 VirtualQuery(&minfo, &minfo, sizeof(minfo)); 339 stack_bottom = (address)minfo.AllocationBase; 340 stack_size = minfo.RegionSize; 341 342 // Add up the sizes of all the regions with the same 343 // AllocationBase. 344 while( 1 ) 345 { 346 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); 347 if ( stack_bottom == (address)minfo.AllocationBase ) 348 stack_size += minfo.RegionSize; 349 else 350 break; 351 } 352 353#ifdef _M_IA64 354 // IA64 has memory and register stacks 355 stack_size = stack_size / 2; 356#endif 357 return stack_bottom + stack_size; 358} 359 360size_t os::current_stack_size() { 361 size_t sz; 362 MEMORY_BASIC_INFORMATION minfo; 363 VirtualQuery(&minfo, &minfo, sizeof(minfo)); 364 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; 365 return sz; 366} 367 368struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 369 const struct tm* time_struct_ptr = localtime(clock); 370 if (time_struct_ptr != NULL) { 371 *res = *time_struct_ptr; 372 return res; 373 } 374 return NULL; 375} 376 377LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); 378 379// Thread start routine for all new Java threads 380static unsigned __stdcall java_start(Thread* thread) { 381 // Try to randomize the cache line index of hot stack frames. 382 // This helps when threads of the same stack traces evict each other's 383 // cache lines. The threads can be either from the same JVM instance, or 384 // from different JVM instances. The benefit is especially true for 385 // processors with hyperthreading technology. 386 static int counter = 0; 387 int pid = os::current_process_id(); 388 _alloca(((pid ^ counter++) & 7) * 128); 389 390 OSThread* osthr = thread->osthread(); 391 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 392 393 if (UseNUMA) { 394 int lgrp_id = os::numa_get_group_id(); 395 if (lgrp_id != -1) { 396 thread->set_lgrp_id(lgrp_id); 397 } 398 } 399 400 401 if (UseVectoredExceptions) { 402 // If we are using vectored exception we don't need to set a SEH 403 thread->run(); 404 } 405 else { 406 // Install a win32 structured exception handler around every thread created 407 // by VM, so VM can genrate error dump when an exception occurred in non- 408 // Java thread (e.g. VM thread). 409 __try { 410 thread->run(); 411 } __except(topLevelExceptionFilter( 412 (_EXCEPTION_POINTERS*)_exception_info())) { 413 // Nothing to do. 414 } 415 } 416 417 // One less thread is executing 418 // When the VMThread gets here, the main thread may have already exited 419 // which frees the CodeHeap containing the Atomic::add code 420 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 421 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); 422 } 423 424 return 0; 425} 426 427static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { 428 // Allocate the OSThread object 429 OSThread* osthread = new OSThread(NULL, NULL); 430 if (osthread == NULL) return NULL; 431 432 // Initialize support for Java interrupts 433 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 434 if (interrupt_event == NULL) { 435 delete osthread; 436 return NULL; 437 } 438 osthread->set_interrupt_event(interrupt_event); 439 440 // Store info on the Win32 thread into the OSThread 441 osthread->set_thread_handle(thread_handle); 442 osthread->set_thread_id(thread_id); 443 444 if (UseNUMA) { 445 int lgrp_id = os::numa_get_group_id(); 446 if (lgrp_id != -1) { 447 thread->set_lgrp_id(lgrp_id); 448 } 449 } 450 451 // Initial thread state is INITIALIZED, not SUSPENDED 452 osthread->set_state(INITIALIZED); 453 454 return osthread; 455} 456 457 458bool os::create_attached_thread(JavaThread* thread) { 459#ifdef ASSERT 460 thread->verify_not_published(); 461#endif 462 HANDLE thread_h; 463 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), 464 &thread_h, THREAD_ALL_ACCESS, false, 0)) { 465 fatal("DuplicateHandle failed\n"); 466 } 467 OSThread* osthread = create_os_thread(thread, thread_h, 468 (int)current_thread_id()); 469 if (osthread == NULL) { 470 return false; 471 } 472 473 // Initial thread state is RUNNABLE 474 osthread->set_state(RUNNABLE); 475 476 thread->set_osthread(osthread); 477 return true; 478} 479 480bool os::create_main_thread(JavaThread* thread) { 481#ifdef ASSERT 482 thread->verify_not_published(); 483#endif 484 if (_starting_thread == NULL) { 485 _starting_thread = create_os_thread(thread, main_thread, main_thread_id); 486 if (_starting_thread == NULL) { 487 return false; 488 } 489 } 490 491 // The primordial thread is runnable from the start) 492 _starting_thread->set_state(RUNNABLE); 493 494 thread->set_osthread(_starting_thread); 495 return true; 496} 497 498// Allocate and initialize a new OSThread 499bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 500 unsigned thread_id; 501 502 // Allocate the OSThread object 503 OSThread* osthread = new OSThread(NULL, NULL); 504 if (osthread == NULL) { 505 return false; 506 } 507 508 // Initialize support for Java interrupts 509 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 510 if (interrupt_event == NULL) { 511 delete osthread; 512 return NULL; 513 } 514 osthread->set_interrupt_event(interrupt_event); 515 osthread->set_interrupted(false); 516 517 thread->set_osthread(osthread); 518 519 if (stack_size == 0) { 520 switch (thr_type) { 521 case os::java_thread: 522 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 523 if (JavaThread::stack_size_at_create() > 0) 524 stack_size = JavaThread::stack_size_at_create(); 525 break; 526 case os::compiler_thread: 527 if (CompilerThreadStackSize > 0) { 528 stack_size = (size_t)(CompilerThreadStackSize * K); 529 break; 530 } // else fall through: 531 // use VMThreadStackSize if CompilerThreadStackSize is not defined 532 case os::vm_thread: 533 case os::pgc_thread: 534 case os::cgc_thread: 535 case os::watcher_thread: 536 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 537 break; 538 } 539 } 540 541 // Create the Win32 thread 542 // 543 // Contrary to what MSDN document says, "stack_size" in _beginthreadex() 544 // does not specify stack size. Instead, it specifies the size of 545 // initially committed space. The stack size is determined by 546 // PE header in the executable. If the committed "stack_size" is larger 547 // than default value in the PE header, the stack is rounded up to the 548 // nearest multiple of 1MB. For example if the launcher has default 549 // stack size of 320k, specifying any size less than 320k does not 550 // affect the actual stack size at all, it only affects the initial 551 // commitment. On the other hand, specifying 'stack_size' larger than 552 // default value may cause significant increase in memory usage, because 553 // not only the stack space will be rounded up to MB, but also the 554 // entire space is committed upfront. 555 // 556 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' 557 // for CreateThread() that can treat 'stack_size' as stack size. However we 558 // are not supposed to call CreateThread() directly according to MSDN 559 // document because JVM uses C runtime library. The good news is that the 560 // flag appears to work with _beginthredex() as well. 561 562#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION 563#define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) 564#endif 565 566 HANDLE thread_handle = 567 (HANDLE)_beginthreadex(NULL, 568 (unsigned)stack_size, 569 (unsigned (__stdcall *)(void*)) java_start, 570 thread, 571 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, 572 &thread_id); 573 if (thread_handle == NULL) { 574 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again 575 // without the flag. 576 thread_handle = 577 (HANDLE)_beginthreadex(NULL, 578 (unsigned)stack_size, 579 (unsigned (__stdcall *)(void*)) java_start, 580 thread, 581 CREATE_SUSPENDED, 582 &thread_id); 583 } 584 if (thread_handle == NULL) { 585 // Need to clean up stuff we've allocated so far 586 CloseHandle(osthread->interrupt_event()); 587 thread->set_osthread(NULL); 588 delete osthread; 589 return NULL; 590 } 591 592 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); 593 594 // Store info on the Win32 thread into the OSThread 595 osthread->set_thread_handle(thread_handle); 596 osthread->set_thread_id(thread_id); 597 598 // Initial thread state is INITIALIZED, not SUSPENDED 599 osthread->set_state(INITIALIZED); 600 601 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 602 return true; 603} 604 605 606// Free Win32 resources related to the OSThread 607void os::free_thread(OSThread* osthread) { 608 assert(osthread != NULL, "osthread not set"); 609 CloseHandle(osthread->thread_handle()); 610 CloseHandle(osthread->interrupt_event()); 611 delete osthread; 612} 613 614 615static int has_performance_count = 0; 616static jlong first_filetime; 617static jlong initial_performance_count; 618static jlong performance_frequency; 619 620 621jlong as_long(LARGE_INTEGER x) { 622 jlong result = 0; // initialization to avoid warning 623 set_high(&result, x.HighPart); 624 set_low(&result, x.LowPart); 625 return result; 626} 627 628 629jlong os::elapsed_counter() { 630 LARGE_INTEGER count; 631 if (has_performance_count) { 632 QueryPerformanceCounter(&count); 633 return as_long(count) - initial_performance_count; 634 } else { 635 FILETIME wt; 636 GetSystemTimeAsFileTime(&wt); 637 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); 638 } 639} 640 641 642jlong os::elapsed_frequency() { 643 if (has_performance_count) { 644 return performance_frequency; 645 } else { 646 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. 647 return 10000000; 648 } 649} 650 651 652julong os::available_memory() { 653 return win32::available_memory(); 654} 655 656julong os::win32::available_memory() { 657 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 658 // value if total memory is larger than 4GB 659 MEMORYSTATUSEX ms; 660 ms.dwLength = sizeof(ms); 661 GlobalMemoryStatusEx(&ms); 662 663 return (julong)ms.ullAvailPhys; 664} 665 666julong os::physical_memory() { 667 return win32::physical_memory(); 668} 669 670julong os::allocatable_physical_memory(julong size) { 671#ifdef _LP64 672 return size; 673#else 674 // Limit to 1400m because of the 2gb address space wall 675 return MIN2(size, (julong)1400*M); 676#endif 677} 678 679// VC6 lacks DWORD_PTR 680#if _MSC_VER < 1300 681typedef UINT_PTR DWORD_PTR; 682#endif 683 684int os::active_processor_count() { 685 DWORD_PTR lpProcessAffinityMask = 0; 686 DWORD_PTR lpSystemAffinityMask = 0; 687 int proc_count = processor_count(); 688 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && 689 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { 690 // Nof active processors is number of bits in process affinity mask 691 int bitcount = 0; 692 while (lpProcessAffinityMask != 0) { 693 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); 694 bitcount++; 695 } 696 return bitcount; 697 } else { 698 return proc_count; 699 } 700} 701 702void os::set_native_thread_name(const char *name) { 703 // Not yet implemented. 704 return; 705} 706 707bool os::distribute_processes(uint length, uint* distribution) { 708 // Not yet implemented. 709 return false; 710} 711 712bool os::bind_to_processor(uint processor_id) { 713 // Not yet implemented. 714 return false; 715} 716 717static void initialize_performance_counter() { 718 LARGE_INTEGER count; 719 if (QueryPerformanceFrequency(&count)) { 720 has_performance_count = 1; 721 performance_frequency = as_long(count); 722 QueryPerformanceCounter(&count); 723 initial_performance_count = as_long(count); 724 } else { 725 has_performance_count = 0; 726 FILETIME wt; 727 GetSystemTimeAsFileTime(&wt); 728 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 729 } 730} 731 732 733double os::elapsedTime() { 734 return (double) elapsed_counter() / (double) elapsed_frequency(); 735} 736 737 738// Windows format: 739// The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. 740// Java format: 741// Java standards require the number of milliseconds since 1/1/1970 742 743// Constant offset - calculated using offset() 744static jlong _offset = 116444736000000000; 745// Fake time counter for reproducible results when debugging 746static jlong fake_time = 0; 747 748#ifdef ASSERT 749// Just to be safe, recalculate the offset in debug mode 750static jlong _calculated_offset = 0; 751static int _has_calculated_offset = 0; 752 753jlong offset() { 754 if (_has_calculated_offset) return _calculated_offset; 755 SYSTEMTIME java_origin; 756 java_origin.wYear = 1970; 757 java_origin.wMonth = 1; 758 java_origin.wDayOfWeek = 0; // ignored 759 java_origin.wDay = 1; 760 java_origin.wHour = 0; 761 java_origin.wMinute = 0; 762 java_origin.wSecond = 0; 763 java_origin.wMilliseconds = 0; 764 FILETIME jot; 765 if (!SystemTimeToFileTime(&java_origin, &jot)) { 766 fatal(err_msg("Error = %d\nWindows error", GetLastError())); 767 } 768 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); 769 _has_calculated_offset = 1; 770 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); 771 return _calculated_offset; 772} 773#else 774jlong offset() { 775 return _offset; 776} 777#endif 778 779jlong windows_to_java_time(FILETIME wt) { 780 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 781 return (a - offset()) / 10000; 782} 783 784FILETIME java_to_windows_time(jlong l) { 785 jlong a = (l * 10000) + offset(); 786 FILETIME result; 787 result.dwHighDateTime = high(a); 788 result.dwLowDateTime = low(a); 789 return result; 790} 791 792// For now, we say that Windows does not support vtime. I have no idea 793// whether it can actually be made to (DLD, 9/13/05). 794 795bool os::supports_vtime() { return false; } 796bool os::enable_vtime() { return false; } 797bool os::vtime_enabled() { return false; } 798double os::elapsedVTime() { 799 // better than nothing, but not much 800 return elapsedTime(); 801} 802 803jlong os::javaTimeMillis() { 804 if (UseFakeTimers) { 805 return fake_time++; 806 } else { 807 FILETIME wt; 808 GetSystemTimeAsFileTime(&wt); 809 return windows_to_java_time(wt); 810 } 811} 812 813jlong os::javaTimeNanos() { 814 if (!has_performance_count) { 815 return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do. 816 } else { 817 LARGE_INTEGER current_count; 818 QueryPerformanceCounter(¤t_count); 819 double current = as_long(current_count); 820 double freq = performance_frequency; 821 jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC); 822 return time; 823 } 824} 825 826void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 827 if (!has_performance_count) { 828 // javaTimeMillis() doesn't have much percision, 829 // but it is not going to wrap -- so all 64 bits 830 info_ptr->max_value = ALL_64_BITS; 831 832 // this is a wall clock timer, so may skip 833 info_ptr->may_skip_backward = true; 834 info_ptr->may_skip_forward = true; 835 } else { 836 jlong freq = performance_frequency; 837 if (freq < NANOSECS_PER_SEC) { 838 // the performance counter is 64 bits and we will 839 // be multiplying it -- so no wrap in 64 bits 840 info_ptr->max_value = ALL_64_BITS; 841 } else if (freq > NANOSECS_PER_SEC) { 842 // use the max value the counter can reach to 843 // determine the max value which could be returned 844 julong max_counter = (julong)ALL_64_BITS; 845 info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC)); 846 } else { 847 // the performance counter is 64 bits and we will 848 // be using it directly -- so no wrap in 64 bits 849 info_ptr->max_value = ALL_64_BITS; 850 } 851 852 // using a counter, so no skipping 853 info_ptr->may_skip_backward = false; 854 info_ptr->may_skip_forward = false; 855 } 856 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 857} 858 859char* os::local_time_string(char *buf, size_t buflen) { 860 SYSTEMTIME st; 861 GetLocalTime(&st); 862 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 863 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); 864 return buf; 865} 866 867bool os::getTimesSecs(double* process_real_time, 868 double* process_user_time, 869 double* process_system_time) { 870 HANDLE h_process = GetCurrentProcess(); 871 FILETIME create_time, exit_time, kernel_time, user_time; 872 BOOL result = GetProcessTimes(h_process, 873 &create_time, 874 &exit_time, 875 &kernel_time, 876 &user_time); 877 if (result != 0) { 878 FILETIME wt; 879 GetSystemTimeAsFileTime(&wt); 880 jlong rtc_millis = windows_to_java_time(wt); 881 jlong user_millis = windows_to_java_time(user_time); 882 jlong system_millis = windows_to_java_time(kernel_time); 883 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); 884 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); 885 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); 886 return true; 887 } else { 888 return false; 889 } 890} 891 892void os::shutdown() { 893 894 // allow PerfMemory to attempt cleanup of any persistent resources 895 perfMemory_exit(); 896 897 // flush buffered output, finish log files 898 ostream_abort(); 899 900 // Check for abort hook 901 abort_hook_t abort_hook = Arguments::abort_hook(); 902 if (abort_hook != NULL) { 903 abort_hook(); 904 } 905} 906 907 908static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 909 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION); 910 911void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) { 912 HINSTANCE dbghelp; 913 EXCEPTION_POINTERS ep; 914 MINIDUMP_EXCEPTION_INFORMATION mei; 915 MINIDUMP_EXCEPTION_INFORMATION* pmei; 916 917 HANDLE hProcess = GetCurrentProcess(); 918 DWORD processId = GetCurrentProcessId(); 919 HANDLE dumpFile; 920 MINIDUMP_TYPE dumpType; 921 static const char* cwd; 922 923 // If running on a client version of Windows and user has not explicitly enabled dumping 924 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) { 925 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false); 926 return; 927 // If running on a server version of Windows and user has explictly disabled dumping 928 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) { 929 VMError::report_coredump_status("Minidump has been disabled from the command line", false); 930 return; 931 } 932 933 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0); 934 935 if (dbghelp == NULL) { 936 VMError::report_coredump_status("Failed to load dbghelp.dll", false); 937 return; 938 } 939 940 _MiniDumpWriteDump = CAST_TO_FN_PTR( 941 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 942 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION), 943 GetProcAddress(dbghelp, "MiniDumpWriteDump")); 944 945 if (_MiniDumpWriteDump == NULL) { 946 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false); 947 return; 948 } 949 950 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData); 951 952// Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with 953// API_VERSION_NUMBER 11 or higher contains the ones we want though 954#if API_VERSION_NUMBER >= 11 955 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo | 956 MiniDumpWithUnloadedModules); 957#endif 958 959 cwd = get_current_directory(NULL, 0); 960 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id()); 961 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 962 963 if (dumpFile == INVALID_HANDLE_VALUE) { 964 VMError::report_coredump_status("Failed to create file for dumping", false); 965 return; 966 } 967 if (exceptionRecord != NULL && contextRecord != NULL) { 968 ep.ContextRecord = (PCONTEXT) contextRecord; 969 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord; 970 971 mei.ThreadId = GetCurrentThreadId(); 972 mei.ExceptionPointers = &ep; 973 pmei = &mei; 974 } else { 975 pmei = NULL; 976 } 977 978 979 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all 980 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then. 981 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false && 982 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) { 983 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false); 984 } else { 985 VMError::report_coredump_status(buffer, true); 986 } 987 988 CloseHandle(dumpFile); 989} 990 991 992 993void os::abort(bool dump_core) 994{ 995 os::shutdown(); 996 // no core dump on Windows 997 ::exit(1); 998} 999 1000// Die immediately, no exit hook, no abort hook, no cleanup. 1001void os::die() { 1002 _exit(-1); 1003} 1004 1005// Directory routines copied from src/win32/native/java/io/dirent_md.c 1006// * dirent_md.c 1.15 00/02/02 1007// 1008// The declarations for DIR and struct dirent are in jvm_win32.h. 1009 1010/* Caller must have already run dirname through JVM_NativePath, which removes 1011 duplicate slashes and converts all instances of '/' into '\\'. */ 1012 1013DIR * 1014os::opendir(const char *dirname) 1015{ 1016 assert(dirname != NULL, "just checking"); // hotspot change 1017 DIR *dirp = (DIR *)malloc(sizeof(DIR)); 1018 DWORD fattr; // hotspot change 1019 char alt_dirname[4] = { 0, 0, 0, 0 }; 1020 1021 if (dirp == 0) { 1022 errno = ENOMEM; 1023 return 0; 1024 } 1025 1026 /* 1027 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it 1028 * as a directory in FindFirstFile(). We detect this case here and 1029 * prepend the current drive name. 1030 */ 1031 if (dirname[1] == '\0' && dirname[0] == '\\') { 1032 alt_dirname[0] = _getdrive() + 'A' - 1; 1033 alt_dirname[1] = ':'; 1034 alt_dirname[2] = '\\'; 1035 alt_dirname[3] = '\0'; 1036 dirname = alt_dirname; 1037 } 1038 1039 dirp->path = (char *)malloc(strlen(dirname) + 5); 1040 if (dirp->path == 0) { 1041 free(dirp); 1042 errno = ENOMEM; 1043 return 0; 1044 } 1045 strcpy(dirp->path, dirname); 1046 1047 fattr = GetFileAttributes(dirp->path); 1048 if (fattr == 0xffffffff) { 1049 free(dirp->path); 1050 free(dirp); 1051 errno = ENOENT; 1052 return 0; 1053 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { 1054 free(dirp->path); 1055 free(dirp); 1056 errno = ENOTDIR; 1057 return 0; 1058 } 1059 1060 /* Append "*.*", or possibly "\\*.*", to path */ 1061 if (dirp->path[1] == ':' 1062 && (dirp->path[2] == '\0' 1063 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { 1064 /* No '\\' needed for cases like "Z:" or "Z:\" */ 1065 strcat(dirp->path, "*.*"); 1066 } else { 1067 strcat(dirp->path, "\\*.*"); 1068 } 1069 1070 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); 1071 if (dirp->handle == INVALID_HANDLE_VALUE) { 1072 if (GetLastError() != ERROR_FILE_NOT_FOUND) { 1073 free(dirp->path); 1074 free(dirp); 1075 errno = EACCES; 1076 return 0; 1077 } 1078 } 1079 return dirp; 1080} 1081 1082/* parameter dbuf unused on Windows */ 1083 1084struct dirent * 1085os::readdir(DIR *dirp, dirent *dbuf) 1086{ 1087 assert(dirp != NULL, "just checking"); // hotspot change 1088 if (dirp->handle == INVALID_HANDLE_VALUE) { 1089 return 0; 1090 } 1091 1092 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); 1093 1094 if (!FindNextFile(dirp->handle, &dirp->find_data)) { 1095 if (GetLastError() == ERROR_INVALID_HANDLE) { 1096 errno = EBADF; 1097 return 0; 1098 } 1099 FindClose(dirp->handle); 1100 dirp->handle = INVALID_HANDLE_VALUE; 1101 } 1102 1103 return &dirp->dirent; 1104} 1105 1106int 1107os::closedir(DIR *dirp) 1108{ 1109 assert(dirp != NULL, "just checking"); // hotspot change 1110 if (dirp->handle != INVALID_HANDLE_VALUE) { 1111 if (!FindClose(dirp->handle)) { 1112 errno = EBADF; 1113 return -1; 1114 } 1115 dirp->handle = INVALID_HANDLE_VALUE; 1116 } 1117 free(dirp->path); 1118 free(dirp); 1119 return 0; 1120} 1121 1122// This must be hard coded because it's the system's temporary 1123// directory not the java application's temp directory, ala java.io.tmpdir. 1124const char* os::get_temp_directory() { 1125 static char path_buf[MAX_PATH]; 1126 if (GetTempPath(MAX_PATH, path_buf)>0) 1127 return path_buf; 1128 else{ 1129 path_buf[0]='\0'; 1130 return path_buf; 1131 } 1132} 1133 1134static bool file_exists(const char* filename) { 1135 if (filename == NULL || strlen(filename) == 0) { 1136 return false; 1137 } 1138 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; 1139} 1140 1141void os::dll_build_name(char *buffer, size_t buflen, 1142 const char* pname, const char* fname) { 1143 const size_t pnamelen = pname ? strlen(pname) : 0; 1144 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; 1145 1146 // Quietly truncates on buffer overflow. Should be an error. 1147 if (pnamelen + strlen(fname) + 10 > buflen) { 1148 *buffer = '\0'; 1149 return; 1150 } 1151 1152 if (pnamelen == 0) { 1153 jio_snprintf(buffer, buflen, "%s.dll", fname); 1154 } else if (c == ':' || c == '\\') { 1155 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); 1156 } else if (strchr(pname, *os::path_separator()) != NULL) { 1157 int n; 1158 char** pelements = split_path(pname, &n); 1159 for (int i = 0 ; i < n ; i++) { 1160 char* path = pelements[i]; 1161 // Really shouldn't be NULL, but check can't hurt 1162 size_t plen = (path == NULL) ? 0 : strlen(path); 1163 if (plen == 0) { 1164 continue; // skip the empty path values 1165 } 1166 const char lastchar = path[plen - 1]; 1167 if (lastchar == ':' || lastchar == '\\') { 1168 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); 1169 } else { 1170 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); 1171 } 1172 if (file_exists(buffer)) { 1173 break; 1174 } 1175 } 1176 // release the storage 1177 for (int i = 0 ; i < n ; i++) { 1178 if (pelements[i] != NULL) { 1179 FREE_C_HEAP_ARRAY(char, pelements[i]); 1180 } 1181 } 1182 if (pelements != NULL) { 1183 FREE_C_HEAP_ARRAY(char*, pelements); 1184 } 1185 } else { 1186 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); 1187 } 1188} 1189 1190// Needs to be in os specific directory because windows requires another 1191// header file <direct.h> 1192const char* os::get_current_directory(char *buf, int buflen) { 1193 return _getcwd(buf, buflen); 1194} 1195 1196//----------------------------------------------------------- 1197// Helper functions for fatal error handler 1198#ifdef _WIN64 1199// Helper routine which returns true if address in 1200// within the NTDLL address space. 1201// 1202static bool _addr_in_ntdll( address addr ) 1203{ 1204 HMODULE hmod; 1205 MODULEINFO minfo; 1206 1207 hmod = GetModuleHandle("NTDLL.DLL"); 1208 if ( hmod == NULL ) return false; 1209 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod, 1210 &minfo, sizeof(MODULEINFO)) ) 1211 return false; 1212 1213 if ( (addr >= minfo.lpBaseOfDll) && 1214 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) 1215 return true; 1216 else 1217 return false; 1218} 1219#endif 1220 1221 1222// Enumerate all modules for a given process ID 1223// 1224// Notice that Windows 95/98/Me and Windows NT/2000/XP have 1225// different API for doing this. We use PSAPI.DLL on NT based 1226// Windows and ToolHelp on 95/98/Me. 1227 1228// Callback function that is called by enumerate_modules() on 1229// every DLL module. 1230// Input parameters: 1231// int pid, 1232// char* module_file_name, 1233// address module_base_addr, 1234// unsigned module_size, 1235// void* param 1236typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); 1237 1238// enumerate_modules for Windows NT, using PSAPI 1239static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) 1240{ 1241 HANDLE hProcess ; 1242 1243# define MAX_NUM_MODULES 128 1244 HMODULE modules[MAX_NUM_MODULES]; 1245 static char filename[ MAX_PATH ]; 1246 int result = 0; 1247 1248 if (!os::PSApiDll::PSApiAvailable()) { 1249 return 0; 1250 } 1251 1252 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 1253 FALSE, pid ) ; 1254 if (hProcess == NULL) return 0; 1255 1256 DWORD size_needed; 1257 if (!os::PSApiDll::EnumProcessModules(hProcess, modules, 1258 sizeof(modules), &size_needed)) { 1259 CloseHandle( hProcess ); 1260 return 0; 1261 } 1262 1263 // number of modules that are currently loaded 1264 int num_modules = size_needed / sizeof(HMODULE); 1265 1266 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { 1267 // Get Full pathname: 1268 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i], 1269 filename, sizeof(filename))) { 1270 filename[0] = '\0'; 1271 } 1272 1273 MODULEINFO modinfo; 1274 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i], 1275 &modinfo, sizeof(modinfo))) { 1276 modinfo.lpBaseOfDll = NULL; 1277 modinfo.SizeOfImage = 0; 1278 } 1279 1280 // Invoke callback function 1281 result = func(pid, filename, (address)modinfo.lpBaseOfDll, 1282 modinfo.SizeOfImage, param); 1283 if (result) break; 1284 } 1285 1286 CloseHandle( hProcess ) ; 1287 return result; 1288} 1289 1290 1291// enumerate_modules for Windows 95/98/ME, using TOOLHELP 1292static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) 1293{ 1294 HANDLE hSnapShot ; 1295 static MODULEENTRY32 modentry ; 1296 int result = 0; 1297 1298 if (!os::Kernel32Dll::HelpToolsAvailable()) { 1299 return 0; 1300 } 1301 1302 // Get a handle to a Toolhelp snapshot of the system 1303 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; 1304 if( hSnapShot == INVALID_HANDLE_VALUE ) { 1305 return FALSE ; 1306 } 1307 1308 // iterate through all modules 1309 modentry.dwSize = sizeof(MODULEENTRY32) ; 1310 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0; 1311 1312 while( not_done ) { 1313 // invoke the callback 1314 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, 1315 modentry.modBaseSize, param); 1316 if (result) break; 1317 1318 modentry.dwSize = sizeof(MODULEENTRY32) ; 1319 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0; 1320 } 1321 1322 CloseHandle(hSnapShot); 1323 return result; 1324} 1325 1326int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) 1327{ 1328 // Get current process ID if caller doesn't provide it. 1329 if (!pid) pid = os::current_process_id(); 1330 1331 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); 1332 else return _enumerate_modules_windows(pid, func, param); 1333} 1334 1335struct _modinfo { 1336 address addr; 1337 char* full_path; // point to a char buffer 1338 int buflen; // size of the buffer 1339 address base_addr; 1340}; 1341 1342static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, 1343 unsigned size, void * param) { 1344 struct _modinfo *pmod = (struct _modinfo *)param; 1345 if (!pmod) return -1; 1346 1347 if (base_addr <= pmod->addr && 1348 base_addr+size > pmod->addr) { 1349 // if a buffer is provided, copy path name to the buffer 1350 if (pmod->full_path) { 1351 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); 1352 } 1353 pmod->base_addr = base_addr; 1354 return 1; 1355 } 1356 return 0; 1357} 1358 1359bool os::dll_address_to_library_name(address addr, char* buf, 1360 int buflen, int* offset) { 1361// NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always 1362// return the full path to the DLL file, sometimes it returns path 1363// to the corresponding PDB file (debug info); sometimes it only 1364// returns partial path, which makes life painful. 1365 1366 struct _modinfo mi; 1367 mi.addr = addr; 1368 mi.full_path = buf; 1369 mi.buflen = buflen; 1370 int pid = os::current_process_id(); 1371 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { 1372 // buf already contains path name 1373 if (offset) *offset = addr - mi.base_addr; 1374 return true; 1375 } else { 1376 if (buf) buf[0] = '\0'; 1377 if (offset) *offset = -1; 1378 return false; 1379 } 1380} 1381 1382bool os::dll_address_to_function_name(address addr, char *buf, 1383 int buflen, int *offset) { 1384 if (Decoder::decode(addr, buf, buflen, offset)) { 1385 return true; 1386 } 1387 if (offset != NULL) *offset = -1; 1388 if (buf != NULL) buf[0] = '\0'; 1389 return false; 1390} 1391 1392// save the start and end address of jvm.dll into param[0] and param[1] 1393static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, 1394 unsigned size, void * param) { 1395 if (!param) return -1; 1396 1397 if (base_addr <= (address)_locate_jvm_dll && 1398 base_addr+size > (address)_locate_jvm_dll) { 1399 ((address*)param)[0] = base_addr; 1400 ((address*)param)[1] = base_addr + size; 1401 return 1; 1402 } 1403 return 0; 1404} 1405 1406address vm_lib_location[2]; // start and end address of jvm.dll 1407 1408// check if addr is inside jvm.dll 1409bool os::address_is_in_vm(address addr) { 1410 if (!vm_lib_location[0] || !vm_lib_location[1]) { 1411 int pid = os::current_process_id(); 1412 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { 1413 assert(false, "Can't find jvm module."); 1414 return false; 1415 } 1416 } 1417 1418 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); 1419} 1420 1421// print module info; param is outputStream* 1422static int _print_module(int pid, char* fname, address base, 1423 unsigned size, void* param) { 1424 if (!param) return -1; 1425 1426 outputStream* st = (outputStream*)param; 1427 1428 address end_addr = base + size; 1429 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); 1430 return 0; 1431} 1432 1433// Loads .dll/.so and 1434// in case of error it checks if .dll/.so was built for the 1435// same architecture as Hotspot is running on 1436void * os::dll_load(const char *name, char *ebuf, int ebuflen) 1437{ 1438 void * result = LoadLibrary(name); 1439 if (result != NULL) 1440 { 1441 return result; 1442 } 1443 1444 DWORD errcode = GetLastError(); 1445 if (errcode == ERROR_MOD_NOT_FOUND) { 1446 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); 1447 ebuf[ebuflen-1]='\0'; 1448 return NULL; 1449 } 1450 1451 // Parsing dll below 1452 // If we can read dll-info and find that dll was built 1453 // for an architecture other than Hotspot is running in 1454 // - then print to buffer "DLL was built for a different architecture" 1455 // else call os::lasterror to obtain system error message 1456 1457 // Read system error message into ebuf 1458 // It may or may not be overwritten below (in the for loop and just above) 1459 lasterror(ebuf, (size_t) ebuflen); 1460 ebuf[ebuflen-1]='\0'; 1461 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); 1462 if (file_descriptor<0) 1463 { 1464 return NULL; 1465 } 1466 1467 uint32_t signature_offset; 1468 uint16_t lib_arch=0; 1469 bool failed_to_get_lib_arch= 1470 ( 1471 //Go to position 3c in the dll 1472 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) 1473 || 1474 // Read loacation of signature 1475 (sizeof(signature_offset)!= 1476 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) 1477 || 1478 //Go to COFF File Header in dll 1479 //that is located after"signature" (4 bytes long) 1480 (os::seek_to_file_offset(file_descriptor, 1481 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) 1482 || 1483 //Read field that contains code of architecture 1484 // that dll was build for 1485 (sizeof(lib_arch)!= 1486 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) 1487 ); 1488 1489 ::close(file_descriptor); 1490 if (failed_to_get_lib_arch) 1491 { 1492 // file i/o error - report os::lasterror(...) msg 1493 return NULL; 1494 } 1495 1496 typedef struct 1497 { 1498 uint16_t arch_code; 1499 char* arch_name; 1500 } arch_t; 1501 1502 static const arch_t arch_array[]={ 1503 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, 1504 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, 1505 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} 1506 }; 1507 #if (defined _M_IA64) 1508 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; 1509 #elif (defined _M_AMD64) 1510 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; 1511 #elif (defined _M_IX86) 1512 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; 1513 #else 1514 #error Method os::dll_load requires that one of following \ 1515 is defined :_M_IA64,_M_AMD64 or _M_IX86 1516 #endif 1517 1518 1519 // Obtain a string for printf operation 1520 // lib_arch_str shall contain string what platform this .dll was built for 1521 // running_arch_str shall string contain what platform Hotspot was built for 1522 char *running_arch_str=NULL,*lib_arch_str=NULL; 1523 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) 1524 { 1525 if (lib_arch==arch_array[i].arch_code) 1526 lib_arch_str=arch_array[i].arch_name; 1527 if (running_arch==arch_array[i].arch_code) 1528 running_arch_str=arch_array[i].arch_name; 1529 } 1530 1531 assert(running_arch_str, 1532 "Didn't find runing architecture code in arch_array"); 1533 1534 // If the architure is right 1535 // but some other error took place - report os::lasterror(...) msg 1536 if (lib_arch == running_arch) 1537 { 1538 return NULL; 1539 } 1540 1541 if (lib_arch_str!=NULL) 1542 { 1543 ::_snprintf(ebuf, ebuflen-1, 1544 "Can't load %s-bit .dll on a %s-bit platform", 1545 lib_arch_str,running_arch_str); 1546 } 1547 else 1548 { 1549 // don't know what architecture this dll was build for 1550 ::_snprintf(ebuf, ebuflen-1, 1551 "Can't load this .dll (machine code=0x%x) on a %s-bit platform", 1552 lib_arch,running_arch_str); 1553 } 1554 1555 return NULL; 1556} 1557 1558 1559void os::print_dll_info(outputStream *st) { 1560 int pid = os::current_process_id(); 1561 st->print_cr("Dynamic libraries:"); 1562 enumerate_modules(pid, _print_module, (void *)st); 1563} 1564 1565void os::print_os_info(outputStream* st) { 1566 st->print("OS:"); 1567 1568 OSVERSIONINFOEX osvi; 1569 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); 1570 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 1571 1572 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { 1573 st->print_cr("N/A"); 1574 return; 1575 } 1576 1577 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; 1578 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { 1579 switch (os_vers) { 1580 case 3051: st->print(" Windows NT 3.51"); break; 1581 case 4000: st->print(" Windows NT 4.0"); break; 1582 case 5000: st->print(" Windows 2000"); break; 1583 case 5001: st->print(" Windows XP"); break; 1584 case 5002: 1585 case 6000: 1586 case 6001: { 1587 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could 1588 // find out whether we are running on 64 bit processor or not. 1589 SYSTEM_INFO si; 1590 ZeroMemory(&si, sizeof(SYSTEM_INFO)); 1591 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){ 1592 GetSystemInfo(&si); 1593 } else { 1594 os::Kernel32Dll::GetNativeSystemInfo(&si); 1595 } 1596 if (os_vers == 5002) { 1597 if (osvi.wProductType == VER_NT_WORKSTATION && 1598 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1599 st->print(" Windows XP x64 Edition"); 1600 else 1601 st->print(" Windows Server 2003 family"); 1602 } else if (os_vers == 6000) { 1603 if (osvi.wProductType == VER_NT_WORKSTATION) 1604 st->print(" Windows Vista"); 1605 else 1606 st->print(" Windows Server 2008"); 1607 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1608 st->print(" , 64 bit"); 1609 } else if (os_vers == 6001) { 1610 if (osvi.wProductType == VER_NT_WORKSTATION) { 1611 st->print(" Windows 7"); 1612 } else { 1613 // Unrecognized windows, print out its major and minor versions 1614 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1615 } 1616 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1617 st->print(" , 64 bit"); 1618 } else { // future os 1619 // Unrecognized windows, print out its major and minor versions 1620 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1621 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1622 st->print(" , 64 bit"); 1623 } 1624 break; 1625 } 1626 default: // future windows, print out its major and minor versions 1627 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1628 } 1629 } else { 1630 switch (os_vers) { 1631 case 4000: st->print(" Windows 95"); break; 1632 case 4010: st->print(" Windows 98"); break; 1633 case 4090: st->print(" Windows Me"); break; 1634 default: // future windows, print out its major and minor versions 1635 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1636 } 1637 } 1638 st->print(" Build %d", osvi.dwBuildNumber); 1639 st->print(" %s", osvi.szCSDVersion); // service pack 1640 st->cr(); 1641} 1642 1643void os::pd_print_cpu_info(outputStream* st) { 1644 // Nothing to do for now. 1645} 1646 1647void os::print_memory_info(outputStream* st) { 1648 st->print("Memory:"); 1649 st->print(" %dk page", os::vm_page_size()>>10); 1650 1651 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 1652 // value if total memory is larger than 4GB 1653 MEMORYSTATUSEX ms; 1654 ms.dwLength = sizeof(ms); 1655 GlobalMemoryStatusEx(&ms); 1656 1657 st->print(", physical %uk", os::physical_memory() >> 10); 1658 st->print("(%uk free)", os::available_memory() >> 10); 1659 1660 st->print(", swap %uk", ms.ullTotalPageFile >> 10); 1661 st->print("(%uk free)", ms.ullAvailPageFile >> 10); 1662 st->cr(); 1663} 1664 1665void os::print_siginfo(outputStream *st, void *siginfo) { 1666 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; 1667 st->print("siginfo:"); 1668 st->print(" ExceptionCode=0x%x", er->ExceptionCode); 1669 1670 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 1671 er->NumberParameters >= 2) { 1672 switch (er->ExceptionInformation[0]) { 1673 case 0: st->print(", reading address"); break; 1674 case 1: st->print(", writing address"); break; 1675 default: st->print(", ExceptionInformation=" INTPTR_FORMAT, 1676 er->ExceptionInformation[0]); 1677 } 1678 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); 1679 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && 1680 er->NumberParameters >= 2 && UseSharedSpaces) { 1681 FileMapInfo* mapinfo = FileMapInfo::current_info(); 1682 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { 1683 st->print("\n\nError accessing class data sharing archive." \ 1684 " Mapped file inaccessible during execution, " \ 1685 " possible disk/network problem."); 1686 } 1687 } else { 1688 int num = er->NumberParameters; 1689 if (num > 0) { 1690 st->print(", ExceptionInformation="); 1691 for (int i = 0; i < num; i++) { 1692 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); 1693 } 1694 } 1695 } 1696 st->cr(); 1697} 1698 1699void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 1700 // do nothing 1701} 1702 1703static char saved_jvm_path[MAX_PATH] = {0}; 1704 1705// Find the full path to the current module, jvm.dll or jvm_g.dll 1706void os::jvm_path(char *buf, jint buflen) { 1707 // Error checking. 1708 if (buflen < MAX_PATH) { 1709 assert(false, "must use a large-enough buffer"); 1710 buf[0] = '\0'; 1711 return; 1712 } 1713 // Lazy resolve the path to current module. 1714 if (saved_jvm_path[0] != 0) { 1715 strcpy(buf, saved_jvm_path); 1716 return; 1717 } 1718 1719 buf[0] = '\0'; 1720 if (Arguments::created_by_gamma_launcher()) { 1721 // Support for the gamma launcher. Check for an 1722 // JAVA_HOME environment variable 1723 // and fix up the path so it looks like 1724 // libjvm.so is installed there (append a fake suffix 1725 // hotspot/libjvm.so). 1726 char* java_home_var = ::getenv("JAVA_HOME"); 1727 if (java_home_var != NULL && java_home_var[0] != 0) { 1728 1729 strncpy(buf, java_home_var, buflen); 1730 1731 // determine if this is a legacy image or modules image 1732 // modules image doesn't have "jre" subdirectory 1733 size_t len = strlen(buf); 1734 char* jrebin_p = buf + len; 1735 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\"); 1736 if (0 != _access(buf, 0)) { 1737 jio_snprintf(jrebin_p, buflen-len, "\\bin\\"); 1738 } 1739 len = strlen(buf); 1740 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll"); 1741 } 1742 } 1743 1744 if(buf[0] == '\0') { 1745 GetModuleFileName(vm_lib_handle, buf, buflen); 1746 } 1747 strcpy(saved_jvm_path, buf); 1748} 1749 1750 1751void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 1752#ifndef _WIN64 1753 st->print("_"); 1754#endif 1755} 1756 1757 1758void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 1759#ifndef _WIN64 1760 st->print("@%d", args_size * sizeof(int)); 1761#endif 1762} 1763 1764// This method is a copy of JDK's sysGetLastErrorString 1765// from src/windows/hpi/src/system_md.c 1766 1767size_t os::lasterror(char* buf, size_t len) { 1768 DWORD errval; 1769 1770 if ((errval = GetLastError()) != 0) { 1771 // DOS error 1772 size_t n = (size_t)FormatMessage( 1773 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, 1774 NULL, 1775 errval, 1776 0, 1777 buf, 1778 (DWORD)len, 1779 NULL); 1780 if (n > 3) { 1781 // Drop final '.', CR, LF 1782 if (buf[n - 1] == '\n') n--; 1783 if (buf[n - 1] == '\r') n--; 1784 if (buf[n - 1] == '.') n--; 1785 buf[n] = '\0'; 1786 } 1787 return n; 1788 } 1789 1790 if (errno != 0) { 1791 // C runtime error that has no corresponding DOS error code 1792 const char* s = strerror(errno); 1793 size_t n = strlen(s); 1794 if (n >= len) n = len - 1; 1795 strncpy(buf, s, n); 1796 buf[n] = '\0'; 1797 return n; 1798 } 1799 1800 return 0; 1801} 1802 1803int os::get_last_error() { 1804 DWORD error = GetLastError(); 1805 if (error == 0) 1806 error = errno; 1807 return (int)error; 1808} 1809 1810// sun.misc.Signal 1811// NOTE that this is a workaround for an apparent kernel bug where if 1812// a signal handler for SIGBREAK is installed then that signal handler 1813// takes priority over the console control handler for CTRL_CLOSE_EVENT. 1814// See bug 4416763. 1815static void (*sigbreakHandler)(int) = NULL; 1816 1817static void UserHandler(int sig, void *siginfo, void *context) { 1818 os::signal_notify(sig); 1819 // We need to reinstate the signal handler each time... 1820 os::signal(sig, (void*)UserHandler); 1821} 1822 1823void* os::user_handler() { 1824 return (void*) UserHandler; 1825} 1826 1827void* os::signal(int signal_number, void* handler) { 1828 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { 1829 void (*oldHandler)(int) = sigbreakHandler; 1830 sigbreakHandler = (void (*)(int)) handler; 1831 return (void*) oldHandler; 1832 } else { 1833 return (void*)::signal(signal_number, (void (*)(int))handler); 1834 } 1835} 1836 1837void os::signal_raise(int signal_number) { 1838 raise(signal_number); 1839} 1840 1841// The Win32 C runtime library maps all console control events other than ^C 1842// into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, 1843// logoff, and shutdown events. We therefore install our own console handler 1844// that raises SIGTERM for the latter cases. 1845// 1846static BOOL WINAPI consoleHandler(DWORD event) { 1847 switch(event) { 1848 case CTRL_C_EVENT: 1849 if (is_error_reported()) { 1850 // Ctrl-C is pressed during error reporting, likely because the error 1851 // handler fails to abort. Let VM die immediately. 1852 os::die(); 1853 } 1854 1855 os::signal_raise(SIGINT); 1856 return TRUE; 1857 break; 1858 case CTRL_BREAK_EVENT: 1859 if (sigbreakHandler != NULL) { 1860 (*sigbreakHandler)(SIGBREAK); 1861 } 1862 return TRUE; 1863 break; 1864 case CTRL_CLOSE_EVENT: 1865 case CTRL_LOGOFF_EVENT: 1866 case CTRL_SHUTDOWN_EVENT: 1867 os::signal_raise(SIGTERM); 1868 return TRUE; 1869 break; 1870 default: 1871 break; 1872 } 1873 return FALSE; 1874} 1875 1876/* 1877 * The following code is moved from os.cpp for making this 1878 * code platform specific, which it is by its very nature. 1879 */ 1880 1881// Return maximum OS signal used + 1 for internal use only 1882// Used as exit signal for signal_thread 1883int os::sigexitnum_pd(){ 1884 return NSIG; 1885} 1886 1887// a counter for each possible signal value, including signal_thread exit signal 1888static volatile jint pending_signals[NSIG+1] = { 0 }; 1889static HANDLE sig_sem; 1890 1891void os::signal_init_pd() { 1892 // Initialize signal structures 1893 memset((void*)pending_signals, 0, sizeof(pending_signals)); 1894 1895 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); 1896 1897 // Programs embedding the VM do not want it to attempt to receive 1898 // events like CTRL_LOGOFF_EVENT, which are used to implement the 1899 // shutdown hooks mechanism introduced in 1.3. For example, when 1900 // the VM is run as part of a Windows NT service (i.e., a servlet 1901 // engine in a web server), the correct behavior is for any console 1902 // control handler to return FALSE, not TRUE, because the OS's 1903 // "final" handler for such events allows the process to continue if 1904 // it is a service (while terminating it if it is not a service). 1905 // To make this behavior uniform and the mechanism simpler, we 1906 // completely disable the VM's usage of these console events if -Xrs 1907 // (=ReduceSignalUsage) is specified. This means, for example, that 1908 // the CTRL-BREAK thread dump mechanism is also disabled in this 1909 // case. See bugs 4323062, 4345157, and related bugs. 1910 1911 if (!ReduceSignalUsage) { 1912 // Add a CTRL-C handler 1913 SetConsoleCtrlHandler(consoleHandler, TRUE); 1914 } 1915} 1916 1917void os::signal_notify(int signal_number) { 1918 BOOL ret; 1919 1920 Atomic::inc(&pending_signals[signal_number]); 1921 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); 1922 assert(ret != 0, "ReleaseSemaphore() failed"); 1923} 1924 1925static int check_pending_signals(bool wait_for_signal) { 1926 DWORD ret; 1927 while (true) { 1928 for (int i = 0; i < NSIG + 1; i++) { 1929 jint n = pending_signals[i]; 1930 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 1931 return i; 1932 } 1933 } 1934 if (!wait_for_signal) { 1935 return -1; 1936 } 1937 1938 JavaThread *thread = JavaThread::current(); 1939 1940 ThreadBlockInVM tbivm(thread); 1941 1942 bool threadIsSuspended; 1943 do { 1944 thread->set_suspend_equivalent(); 1945 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 1946 ret = ::WaitForSingleObject(sig_sem, INFINITE); 1947 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); 1948 1949 // were we externally suspended while we were waiting? 1950 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 1951 if (threadIsSuspended) { 1952 // 1953 // The semaphore has been incremented, but while we were waiting 1954 // another thread suspended us. We don't want to continue running 1955 // while suspended because that would surprise the thread that 1956 // suspended us. 1957 // 1958 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); 1959 assert(ret != 0, "ReleaseSemaphore() failed"); 1960 1961 thread->java_suspend_self(); 1962 } 1963 } while (threadIsSuspended); 1964 } 1965} 1966 1967int os::signal_lookup() { 1968 return check_pending_signals(false); 1969} 1970 1971int os::signal_wait() { 1972 return check_pending_signals(true); 1973} 1974 1975// Implicit OS exception handling 1976 1977LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { 1978 JavaThread* thread = JavaThread::current(); 1979 // Save pc in thread 1980#ifdef _M_IA64 1981 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); 1982 // Set pc to handler 1983 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; 1984#elif _M_AMD64 1985 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); 1986 // Set pc to handler 1987 exceptionInfo->ContextRecord->Rip = (DWORD64)handler; 1988#else 1989 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); 1990 // Set pc to handler 1991 exceptionInfo->ContextRecord->Eip = (LONG)handler; 1992#endif 1993 1994 // Continue the execution 1995 return EXCEPTION_CONTINUE_EXECUTION; 1996} 1997 1998 1999// Used for PostMortemDump 2000extern "C" void safepoints(); 2001extern "C" void find(int x); 2002extern "C" void events(); 2003 2004// According to Windows API documentation, an illegal instruction sequence should generate 2005// the 0xC000001C exception code. However, real world experience shows that occasionnaly 2006// the execution of an illegal instruction can generate the exception code 0xC000001E. This 2007// seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). 2008 2009#define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E 2010 2011// From "Execution Protection in the Windows Operating System" draft 0.35 2012// Once a system header becomes available, the "real" define should be 2013// included or copied here. 2014#define EXCEPTION_INFO_EXEC_VIOLATION 0x08 2015 2016#define def_excpt(val) #val, val 2017 2018struct siglabel { 2019 char *name; 2020 int number; 2021}; 2022 2023// All Visual C++ exceptions thrown from code generated by the Microsoft Visual 2024// C++ compiler contain this error code. Because this is a compiler-generated 2025// error, the code is not listed in the Win32 API header files. 2026// The code is actually a cryptic mnemonic device, with the initial "E" 2027// standing for "exception" and the final 3 bytes (0x6D7363) representing the 2028// ASCII values of "msc". 2029 2030#define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363 2031 2032 2033struct siglabel exceptlabels[] = { 2034 def_excpt(EXCEPTION_ACCESS_VIOLATION), 2035 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), 2036 def_excpt(EXCEPTION_BREAKPOINT), 2037 def_excpt(EXCEPTION_SINGLE_STEP), 2038 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), 2039 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), 2040 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), 2041 def_excpt(EXCEPTION_FLT_INEXACT_RESULT), 2042 def_excpt(EXCEPTION_FLT_INVALID_OPERATION), 2043 def_excpt(EXCEPTION_FLT_OVERFLOW), 2044 def_excpt(EXCEPTION_FLT_STACK_CHECK), 2045 def_excpt(EXCEPTION_FLT_UNDERFLOW), 2046 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), 2047 def_excpt(EXCEPTION_INT_OVERFLOW), 2048 def_excpt(EXCEPTION_PRIV_INSTRUCTION), 2049 def_excpt(EXCEPTION_IN_PAGE_ERROR), 2050 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), 2051 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), 2052 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), 2053 def_excpt(EXCEPTION_STACK_OVERFLOW), 2054 def_excpt(EXCEPTION_INVALID_DISPOSITION), 2055 def_excpt(EXCEPTION_GUARD_PAGE), 2056 def_excpt(EXCEPTION_INVALID_HANDLE), 2057 def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION), 2058 NULL, 0 2059}; 2060 2061const char* os::exception_name(int exception_code, char *buf, size_t size) { 2062 for (int i = 0; exceptlabels[i].name != NULL; i++) { 2063 if (exceptlabels[i].number == exception_code) { 2064 jio_snprintf(buf, size, "%s", exceptlabels[i].name); 2065 return buf; 2066 } 2067 } 2068 2069 return NULL; 2070} 2071 2072//----------------------------------------------------------------------------- 2073LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { 2074 // handle exception caused by idiv; should only happen for -MinInt/-1 2075 // (division by zero is handled explicitly) 2076#ifdef _M_IA64 2077 assert(0, "Fix Handle_IDiv_Exception"); 2078#elif _M_AMD64 2079 PCONTEXT ctx = exceptionInfo->ContextRecord; 2080 address pc = (address)ctx->Rip; 2081 assert(pc[0] == 0xF7, "not an idiv opcode"); 2082 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2083 assert(ctx->Rax == min_jint, "unexpected idiv exception"); 2084 // set correct result values and continue after idiv instruction 2085 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2086 ctx->Rax = (DWORD)min_jint; // result 2087 ctx->Rdx = (DWORD)0; // remainder 2088 // Continue the execution 2089#else 2090 PCONTEXT ctx = exceptionInfo->ContextRecord; 2091 address pc = (address)ctx->Eip; 2092 assert(pc[0] == 0xF7, "not an idiv opcode"); 2093 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2094 assert(ctx->Eax == min_jint, "unexpected idiv exception"); 2095 // set correct result values and continue after idiv instruction 2096 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2097 ctx->Eax = (DWORD)min_jint; // result 2098 ctx->Edx = (DWORD)0; // remainder 2099 // Continue the execution 2100#endif 2101 return EXCEPTION_CONTINUE_EXECUTION; 2102} 2103 2104#ifndef _WIN64 2105//----------------------------------------------------------------------------- 2106LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { 2107 // handle exception caused by native method modifying control word 2108 PCONTEXT ctx = exceptionInfo->ContextRecord; 2109 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2110 2111 switch (exception_code) { 2112 case EXCEPTION_FLT_DENORMAL_OPERAND: 2113 case EXCEPTION_FLT_DIVIDE_BY_ZERO: 2114 case EXCEPTION_FLT_INEXACT_RESULT: 2115 case EXCEPTION_FLT_INVALID_OPERATION: 2116 case EXCEPTION_FLT_OVERFLOW: 2117 case EXCEPTION_FLT_STACK_CHECK: 2118 case EXCEPTION_FLT_UNDERFLOW: 2119 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); 2120 if (fp_control_word != ctx->FloatSave.ControlWord) { 2121 // Restore FPCW and mask out FLT exceptions 2122 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; 2123 // Mask out pending FLT exceptions 2124 ctx->FloatSave.StatusWord &= 0xffffff00; 2125 return EXCEPTION_CONTINUE_EXECUTION; 2126 } 2127 } 2128 2129 if (prev_uef_handler != NULL) { 2130 // We didn't handle this exception so pass it to the previous 2131 // UnhandledExceptionFilter. 2132 return (prev_uef_handler)(exceptionInfo); 2133 } 2134 2135 return EXCEPTION_CONTINUE_SEARCH; 2136} 2137#else //_WIN64 2138/* 2139 On Windows, the mxcsr control bits are non-volatile across calls 2140 See also CR 6192333 2141 If EXCEPTION_FLT_* happened after some native method modified 2142 mxcsr - it is not a jvm fault. 2143 However should we decide to restore of mxcsr after a faulty 2144 native method we can uncomment following code 2145 jint MxCsr = INITIAL_MXCSR; 2146 // we can't use StubRoutines::addr_mxcsr_std() 2147 // because in Win64 mxcsr is not saved there 2148 if (MxCsr != ctx->MxCsr) { 2149 ctx->MxCsr = MxCsr; 2150 return EXCEPTION_CONTINUE_EXECUTION; 2151 } 2152 2153*/ 2154#endif //_WIN64 2155 2156 2157// Fatal error reporting is single threaded so we can make this a 2158// static and preallocated. If it's more than MAX_PATH silently ignore 2159// it. 2160static char saved_error_file[MAX_PATH] = {0}; 2161 2162void os::set_error_file(const char *logfile) { 2163 if (strlen(logfile) <= MAX_PATH) { 2164 strncpy(saved_error_file, logfile, MAX_PATH); 2165 } 2166} 2167 2168static inline void report_error(Thread* t, DWORD exception_code, 2169 address addr, void* siginfo, void* context) { 2170 VMError err(t, exception_code, addr, siginfo, context); 2171 err.report_and_die(); 2172 2173 // If UseOsErrorReporting, this will return here and save the error file 2174 // somewhere where we can find it in the minidump. 2175} 2176 2177//----------------------------------------------------------------------------- 2178LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { 2179 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; 2180 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2181#ifdef _M_IA64 2182 address pc = (address) exceptionInfo->ContextRecord->StIIP; 2183#elif _M_AMD64 2184 address pc = (address) exceptionInfo->ContextRecord->Rip; 2185#else 2186 address pc = (address) exceptionInfo->ContextRecord->Eip; 2187#endif 2188 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady 2189 2190#ifndef _WIN64 2191 // Execution protection violation - win32 running on AMD64 only 2192 // Handled first to avoid misdiagnosis as a "normal" access violation; 2193 // This is safe to do because we have a new/unique ExceptionInformation 2194 // code for this condition. 2195 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2196 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2197 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; 2198 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2199 2200 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { 2201 int page_size = os::vm_page_size(); 2202 2203 // Make sure the pc and the faulting address are sane. 2204 // 2205 // If an instruction spans a page boundary, and the page containing 2206 // the beginning of the instruction is executable but the following 2207 // page is not, the pc and the faulting address might be slightly 2208 // different - we still want to unguard the 2nd page in this case. 2209 // 2210 // 15 bytes seems to be a (very) safe value for max instruction size. 2211 bool pc_is_near_addr = 2212 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); 2213 bool instr_spans_page_boundary = 2214 (align_size_down((intptr_t) pc ^ (intptr_t) addr, 2215 (intptr_t) page_size) > 0); 2216 2217 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { 2218 static volatile address last_addr = 2219 (address) os::non_memory_address_word(); 2220 2221 // In conservative mode, don't unguard unless the address is in the VM 2222 if (UnguardOnExecutionViolation > 0 && addr != last_addr && 2223 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { 2224 2225 // Set memory to RWX and retry 2226 address page_start = 2227 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); 2228 bool res = os::protect_memory((char*) page_start, page_size, 2229 os::MEM_PROT_RWX); 2230 2231 if (PrintMiscellaneous && Verbose) { 2232 char buf[256]; 2233 jio_snprintf(buf, sizeof(buf), "Execution protection violation " 2234 "at " INTPTR_FORMAT 2235 ", unguarding " INTPTR_FORMAT ": %s", addr, 2236 page_start, (res ? "success" : strerror(errno))); 2237 tty->print_raw_cr(buf); 2238 } 2239 2240 // Set last_addr so if we fault again at the same address, we don't 2241 // end up in an endless loop. 2242 // 2243 // There are two potential complications here. Two threads trapping 2244 // at the same address at the same time could cause one of the 2245 // threads to think it already unguarded, and abort the VM. Likely 2246 // very rare. 2247 // 2248 // The other race involves two threads alternately trapping at 2249 // different addresses and failing to unguard the page, resulting in 2250 // an endless loop. This condition is probably even more unlikely 2251 // than the first. 2252 // 2253 // Although both cases could be avoided by using locks or thread 2254 // local last_addr, these solutions are unnecessary complication: 2255 // this handler is a best-effort safety net, not a complete solution. 2256 // It is disabled by default and should only be used as a workaround 2257 // in case we missed any no-execute-unsafe VM code. 2258 2259 last_addr = addr; 2260 2261 return EXCEPTION_CONTINUE_EXECUTION; 2262 } 2263 } 2264 2265 // Last unguard failed or not unguarding 2266 tty->print_raw_cr("Execution protection violation"); 2267 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, 2268 exceptionInfo->ContextRecord); 2269 return EXCEPTION_CONTINUE_SEARCH; 2270 } 2271 } 2272#endif // _WIN64 2273 2274 // Check to see if we caught the safepoint code in the 2275 // process of write protecting the memory serialization page. 2276 // It write enables the page immediately after protecting it 2277 // so just return. 2278 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 2279 JavaThread* thread = (JavaThread*) t; 2280 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2281 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2282 if ( os::is_memory_serialize_page(thread, addr) ) { 2283 // Block current thread until the memory serialize page permission restored. 2284 os::block_on_serialize_page_trap(); 2285 return EXCEPTION_CONTINUE_EXECUTION; 2286 } 2287 } 2288 2289 if (t != NULL && t->is_Java_thread()) { 2290 JavaThread* thread = (JavaThread*) t; 2291 bool in_java = thread->thread_state() == _thread_in_Java; 2292 2293 // Handle potential stack overflows up front. 2294 if (exception_code == EXCEPTION_STACK_OVERFLOW) { 2295 if (os::uses_stack_guard_pages()) { 2296#ifdef _M_IA64 2297 // 2298 // If it's a legal stack address continue, Windows will map it in. 2299 // 2300 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2301 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2302 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) 2303 return EXCEPTION_CONTINUE_EXECUTION; 2304 2305 // The register save area is the same size as the memory stack 2306 // and starts at the page just above the start of the memory stack. 2307 // If we get a fault in this area, we've run out of register 2308 // stack. If we are in java, try throwing a stack overflow exception. 2309 if (addr > thread->stack_base() && 2310 addr <= (thread->stack_base()+thread->stack_size()) ) { 2311 char buf[256]; 2312 jio_snprintf(buf, sizeof(buf), 2313 "Register stack overflow, addr:%p, stack_base:%p\n", 2314 addr, thread->stack_base() ); 2315 tty->print_raw_cr(buf); 2316 // If not in java code, return and hope for the best. 2317 return in_java ? Handle_Exception(exceptionInfo, 2318 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) 2319 : EXCEPTION_CONTINUE_EXECUTION; 2320 } 2321#endif 2322 if (thread->stack_yellow_zone_enabled()) { 2323 // Yellow zone violation. The o/s has unprotected the first yellow 2324 // zone page for us. Note: must call disable_stack_yellow_zone to 2325 // update the enabled status, even if the zone contains only one page. 2326 thread->disable_stack_yellow_zone(); 2327 // If not in java code, return and hope for the best. 2328 return in_java ? Handle_Exception(exceptionInfo, 2329 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) 2330 : EXCEPTION_CONTINUE_EXECUTION; 2331 } else { 2332 // Fatal red zone violation. 2333 thread->disable_stack_red_zone(); 2334 tty->print_raw_cr("An unrecoverable stack overflow has occurred."); 2335 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2336 exceptionInfo->ContextRecord); 2337 return EXCEPTION_CONTINUE_SEARCH; 2338 } 2339 } else if (in_java) { 2340 // JVM-managed guard pages cannot be used on win95/98. The o/s provides 2341 // a one-time-only guard page, which it has released to us. The next 2342 // stack overflow on this thread will result in an ACCESS_VIOLATION. 2343 return Handle_Exception(exceptionInfo, 2344 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2345 } else { 2346 // Can only return and hope for the best. Further stack growth will 2347 // result in an ACCESS_VIOLATION. 2348 return EXCEPTION_CONTINUE_EXECUTION; 2349 } 2350 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2351 // Either stack overflow or null pointer exception. 2352 if (in_java) { 2353 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2354 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2355 address stack_end = thread->stack_base() - thread->stack_size(); 2356 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { 2357 // Stack overflow. 2358 assert(!os::uses_stack_guard_pages(), 2359 "should be caught by red zone code above."); 2360 return Handle_Exception(exceptionInfo, 2361 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2362 } 2363 // 2364 // Check for safepoint polling and implicit null 2365 // We only expect null pointers in the stubs (vtable) 2366 // the rest are checked explicitly now. 2367 // 2368 CodeBlob* cb = CodeCache::find_blob(pc); 2369 if (cb != NULL) { 2370 if (os::is_poll_address(addr)) { 2371 address stub = SharedRuntime::get_poll_stub(pc); 2372 return Handle_Exception(exceptionInfo, stub); 2373 } 2374 } 2375 { 2376#ifdef _WIN64 2377 // 2378 // If it's a legal stack address map the entire region in 2379 // 2380 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2381 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2382 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { 2383 addr = (address)((uintptr_t)addr & 2384 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); 2385 os::commit_memory((char *)addr, thread->stack_base() - addr, 2386 false ); 2387 return EXCEPTION_CONTINUE_EXECUTION; 2388 } 2389 else 2390#endif 2391 { 2392 // Null pointer exception. 2393#ifdef _M_IA64 2394 // We catch register stack overflows in compiled code by doing 2395 // an explicit compare and executing a st8(G0, G0) if the 2396 // BSP enters into our guard area. We test for the overflow 2397 // condition and fall into the normal null pointer exception 2398 // code if BSP hasn't overflowed. 2399 if ( in_java ) { 2400 if(thread->register_stack_overflow()) { 2401 assert((address)exceptionInfo->ContextRecord->IntS3 == 2402 thread->register_stack_limit(), 2403 "GR7 doesn't contain register_stack_limit"); 2404 // Disable the yellow zone which sets the state that 2405 // we've got a stack overflow problem. 2406 if (thread->stack_yellow_zone_enabled()) { 2407 thread->disable_stack_yellow_zone(); 2408 } 2409 // Give us some room to process the exception 2410 thread->disable_register_stack_guard(); 2411 // Update GR7 with the new limit so we can continue running 2412 // compiled code. 2413 exceptionInfo->ContextRecord->IntS3 = 2414 (ULONGLONG)thread->register_stack_limit(); 2415 return Handle_Exception(exceptionInfo, 2416 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2417 } else { 2418 // 2419 // Check for implicit null 2420 // We only expect null pointers in the stubs (vtable) 2421 // the rest are checked explicitly now. 2422 // 2423 if (((uintptr_t)addr) < os::vm_page_size() ) { 2424 // an access to the first page of VM--assume it is a null pointer 2425 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 2426 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); 2427 } 2428 } 2429 } // in_java 2430 2431 // IA64 doesn't use implicit null checking yet. So we shouldn't 2432 // get here. 2433 tty->print_raw_cr("Access violation, possible null pointer exception"); 2434 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2435 exceptionInfo->ContextRecord); 2436 return EXCEPTION_CONTINUE_SEARCH; 2437#else /* !IA64 */ 2438 2439 // Windows 98 reports faulting addresses incorrectly 2440 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || 2441 !os::win32::is_nt()) { 2442 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 2443 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); 2444 } 2445 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2446 exceptionInfo->ContextRecord); 2447 return EXCEPTION_CONTINUE_SEARCH; 2448#endif 2449 } 2450 } 2451 } 2452 2453#ifdef _WIN64 2454 // Special care for fast JNI field accessors. 2455 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks 2456 // in and the heap gets shrunk before the field access. 2457 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2458 address addr = JNI_FastGetField::find_slowcase_pc(pc); 2459 if (addr != (address)-1) { 2460 return Handle_Exception(exceptionInfo, addr); 2461 } 2462 } 2463#endif 2464 2465#ifdef _WIN64 2466 // Windows will sometimes generate an access violation 2467 // when we call malloc. Since we use VectoredExceptions 2468 // on 64 bit platforms, we see this exception. We must 2469 // pass this exception on so Windows can recover. 2470 // We check to see if the pc of the fault is in NTDLL.DLL 2471 // if so, we pass control on to Windows for handling. 2472 if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH; 2473#endif 2474 2475 // Stack overflow or null pointer exception in native code. 2476 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2477 exceptionInfo->ContextRecord); 2478 return EXCEPTION_CONTINUE_SEARCH; 2479 } 2480 2481 if (in_java) { 2482 switch (exception_code) { 2483 case EXCEPTION_INT_DIVIDE_BY_ZERO: 2484 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); 2485 2486 case EXCEPTION_INT_OVERFLOW: 2487 return Handle_IDiv_Exception(exceptionInfo); 2488 2489 } // switch 2490 } 2491#ifndef _WIN64 2492 if (((thread->thread_state() == _thread_in_Java) || 2493 (thread->thread_state() == _thread_in_native)) && 2494 exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION) 2495 { 2496 LONG result=Handle_FLT_Exception(exceptionInfo); 2497 if (result==EXCEPTION_CONTINUE_EXECUTION) return result; 2498 } 2499#endif //_WIN64 2500 } 2501 2502 if (exception_code != EXCEPTION_BREAKPOINT) { 2503#ifndef _WIN64 2504 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2505 exceptionInfo->ContextRecord); 2506#else 2507 // Itanium Windows uses a VectoredExceptionHandler 2508 // Which means that C++ programatic exception handlers (try/except) 2509 // will get here. Continue the search for the right except block if 2510 // the exception code is not a fatal code. 2511 switch ( exception_code ) { 2512 case EXCEPTION_ACCESS_VIOLATION: 2513 case EXCEPTION_STACK_OVERFLOW: 2514 case EXCEPTION_ILLEGAL_INSTRUCTION: 2515 case EXCEPTION_ILLEGAL_INSTRUCTION_2: 2516 case EXCEPTION_INT_OVERFLOW: 2517 case EXCEPTION_INT_DIVIDE_BY_ZERO: 2518 case EXCEPTION_UNCAUGHT_CXX_EXCEPTION: 2519 { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2520 exceptionInfo->ContextRecord); 2521 } 2522 break; 2523 default: 2524 break; 2525 } 2526#endif 2527 } 2528 return EXCEPTION_CONTINUE_SEARCH; 2529} 2530 2531#ifndef _WIN64 2532// Special care for fast JNI accessors. 2533// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and 2534// the heap gets shrunk before the field access. 2535// Need to install our own structured exception handler since native code may 2536// install its own. 2537LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { 2538 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2539 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2540 address pc = (address) exceptionInfo->ContextRecord->Eip; 2541 address addr = JNI_FastGetField::find_slowcase_pc(pc); 2542 if (addr != (address)-1) { 2543 return Handle_Exception(exceptionInfo, addr); 2544 } 2545 } 2546 return EXCEPTION_CONTINUE_SEARCH; 2547} 2548 2549#define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ 2550Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ 2551 __try { \ 2552 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ 2553 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ 2554 } \ 2555 return 0; \ 2556} 2557 2558DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) 2559DEFINE_FAST_GETFIELD(jbyte, byte, Byte) 2560DEFINE_FAST_GETFIELD(jchar, char, Char) 2561DEFINE_FAST_GETFIELD(jshort, short, Short) 2562DEFINE_FAST_GETFIELD(jint, int, Int) 2563DEFINE_FAST_GETFIELD(jlong, long, Long) 2564DEFINE_FAST_GETFIELD(jfloat, float, Float) 2565DEFINE_FAST_GETFIELD(jdouble, double, Double) 2566 2567address os::win32::fast_jni_accessor_wrapper(BasicType type) { 2568 switch (type) { 2569 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; 2570 case T_BYTE: return (address)jni_fast_GetByteField_wrapper; 2571 case T_CHAR: return (address)jni_fast_GetCharField_wrapper; 2572 case T_SHORT: return (address)jni_fast_GetShortField_wrapper; 2573 case T_INT: return (address)jni_fast_GetIntField_wrapper; 2574 case T_LONG: return (address)jni_fast_GetLongField_wrapper; 2575 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; 2576 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; 2577 default: ShouldNotReachHere(); 2578 } 2579 return (address)-1; 2580} 2581#endif 2582 2583// Virtual Memory 2584 2585int os::vm_page_size() { return os::win32::vm_page_size(); } 2586int os::vm_allocation_granularity() { 2587 return os::win32::vm_allocation_granularity(); 2588} 2589 2590// Windows large page support is available on Windows 2003. In order to use 2591// large page memory, the administrator must first assign additional privilege 2592// to the user: 2593// + select Control Panel -> Administrative Tools -> Local Security Policy 2594// + select Local Policies -> User Rights Assignment 2595// + double click "Lock pages in memory", add users and/or groups 2596// + reboot 2597// Note the above steps are needed for administrator as well, as administrators 2598// by default do not have the privilege to lock pages in memory. 2599// 2600// Note about Windows 2003: although the API supports committing large page 2601// memory on a page-by-page basis and VirtualAlloc() returns success under this 2602// scenario, I found through experiment it only uses large page if the entire 2603// memory region is reserved and committed in a single VirtualAlloc() call. 2604// This makes Windows large page support more or less like Solaris ISM, in 2605// that the entire heap must be committed upfront. This probably will change 2606// in the future, if so the code below needs to be revisited. 2607 2608#ifndef MEM_LARGE_PAGES 2609#define MEM_LARGE_PAGES 0x20000000 2610#endif 2611 2612static HANDLE _hProcess; 2613static HANDLE _hToken; 2614 2615// Container for NUMA node list info 2616class NUMANodeListHolder { 2617private: 2618 int *_numa_used_node_list; // allocated below 2619 int _numa_used_node_count; 2620 2621 void free_node_list() { 2622 if (_numa_used_node_list != NULL) { 2623 FREE_C_HEAP_ARRAY(int, _numa_used_node_list); 2624 } 2625 } 2626 2627public: 2628 NUMANodeListHolder() { 2629 _numa_used_node_count = 0; 2630 _numa_used_node_list = NULL; 2631 // do rest of initialization in build routine (after function pointers are set up) 2632 } 2633 2634 ~NUMANodeListHolder() { 2635 free_node_list(); 2636 } 2637 2638 bool build() { 2639 DWORD_PTR proc_aff_mask; 2640 DWORD_PTR sys_aff_mask; 2641 if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false; 2642 ULONG highest_node_number; 2643 if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false; 2644 free_node_list(); 2645 _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1); 2646 for (unsigned int i = 0; i <= highest_node_number; i++) { 2647 ULONGLONG proc_mask_numa_node; 2648 if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false; 2649 if ((proc_aff_mask & proc_mask_numa_node)!=0) { 2650 _numa_used_node_list[_numa_used_node_count++] = i; 2651 } 2652 } 2653 return (_numa_used_node_count > 1); 2654 } 2655 2656 int get_count() {return _numa_used_node_count;} 2657 int get_node_list_entry(int n) { 2658 // for indexes out of range, returns -1 2659 return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1); 2660 } 2661 2662} numa_node_list_holder; 2663 2664 2665 2666static size_t _large_page_size = 0; 2667 2668static bool resolve_functions_for_large_page_init() { 2669 return os::Kernel32Dll::GetLargePageMinimumAvailable() && 2670 os::Advapi32Dll::AdvapiAvailable(); 2671} 2672 2673static bool request_lock_memory_privilege() { 2674 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, 2675 os::current_process_id()); 2676 2677 LUID luid; 2678 if (_hProcess != NULL && 2679 os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && 2680 os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { 2681 2682 TOKEN_PRIVILEGES tp; 2683 tp.PrivilegeCount = 1; 2684 tp.Privileges[0].Luid = luid; 2685 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 2686 2687 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the 2688 // privilege. Check GetLastError() too. See MSDN document. 2689 if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && 2690 (GetLastError() == ERROR_SUCCESS)) { 2691 return true; 2692 } 2693 } 2694 2695 return false; 2696} 2697 2698static void cleanup_after_large_page_init() { 2699 if (_hProcess) CloseHandle(_hProcess); 2700 _hProcess = NULL; 2701 if (_hToken) CloseHandle(_hToken); 2702 _hToken = NULL; 2703} 2704 2705static bool numa_interleaving_init() { 2706 bool success = false; 2707 bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving); 2708 2709 // print a warning if UseNUMAInterleaving flag is specified on command line 2710 bool warn_on_failure = use_numa_interleaving_specified; 2711# define WARN(msg) if (warn_on_failure) { warning(msg); } 2712 2713 // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages) 2714 size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity(); 2715 NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity); 2716 2717 if (os::Kernel32Dll::NumaCallsAvailable()) { 2718 if (numa_node_list_holder.build()) { 2719 if (PrintMiscellaneous && Verbose) { 2720 tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count()); 2721 for (int i = 0; i < numa_node_list_holder.get_count(); i++) { 2722 tty->print("%d ", numa_node_list_holder.get_node_list_entry(i)); 2723 } 2724 tty->print("\n"); 2725 } 2726 success = true; 2727 } else { 2728 WARN("Process does not cover multiple NUMA nodes."); 2729 } 2730 } else { 2731 WARN("NUMA Interleaving is not supported by the operating system."); 2732 } 2733 if (!success) { 2734 if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag."); 2735 } 2736 return success; 2737#undef WARN 2738} 2739 2740// this routine is used whenever we need to reserve a contiguous VA range 2741// but we need to make separate VirtualAlloc calls for each piece of the range 2742// Reasons for doing this: 2743// * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise) 2744// * UseNUMAInterleaving requires a separate node for each piece 2745static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot, 2746 bool should_inject_error=false) { 2747 char * p_buf; 2748 // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size 2749 size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity(); 2750 size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size; 2751 2752 // first reserve enough address space in advance since we want to be 2753 // able to break a single contiguous virtual address range into multiple 2754 // large page commits but WS2003 does not allow reserving large page space 2755 // so we just use 4K pages for reserve, this gives us a legal contiguous 2756 // address space. then we will deallocate that reservation, and re alloc 2757 // using large pages 2758 const size_t size_of_reserve = bytes + chunk_size; 2759 if (bytes > size_of_reserve) { 2760 // Overflowed. 2761 return NULL; 2762 } 2763 p_buf = (char *) VirtualAlloc(addr, 2764 size_of_reserve, // size of Reserve 2765 MEM_RESERVE, 2766 PAGE_READWRITE); 2767 // If reservation failed, return NULL 2768 if (p_buf == NULL) return NULL; 2769 2770 os::release_memory(p_buf, bytes + chunk_size); 2771 2772 // we still need to round up to a page boundary (in case we are using large pages) 2773 // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size) 2774 // instead we handle this in the bytes_to_rq computation below 2775 p_buf = (char *) align_size_up((size_t)p_buf, page_size); 2776 2777 // now go through and allocate one chunk at a time until all bytes are 2778 // allocated 2779 size_t bytes_remaining = bytes; 2780 // An overflow of align_size_up() would have been caught above 2781 // in the calculation of size_of_reserve. 2782 char * next_alloc_addr = p_buf; 2783 HANDLE hProc = GetCurrentProcess(); 2784 2785#ifdef ASSERT 2786 // Variable for the failure injection 2787 long ran_num = os::random(); 2788 size_t fail_after = ran_num % bytes; 2789#endif 2790 2791 int count=0; 2792 while (bytes_remaining) { 2793 // select bytes_to_rq to get to the next chunk_size boundary 2794 2795 size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size)); 2796 // Note allocate and commit 2797 char * p_new; 2798 2799#ifdef ASSERT 2800 bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after); 2801#else 2802 const bool inject_error_now = false; 2803#endif 2804 2805 if (inject_error_now) { 2806 p_new = NULL; 2807 } else { 2808 if (!UseNUMAInterleaving) { 2809 p_new = (char *) VirtualAlloc(next_alloc_addr, 2810 bytes_to_rq, 2811 flags, 2812 prot); 2813 } else { 2814 // get the next node to use from the used_node_list 2815 assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected"); 2816 DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count()); 2817 p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc, 2818 next_alloc_addr, 2819 bytes_to_rq, 2820 flags, 2821 prot, 2822 node); 2823 } 2824 } 2825 2826 if (p_new == NULL) { 2827 // Free any allocated pages 2828 if (next_alloc_addr > p_buf) { 2829 // Some memory was committed so release it. 2830 size_t bytes_to_release = bytes - bytes_remaining; 2831 os::release_memory(p_buf, bytes_to_release); 2832 } 2833#ifdef ASSERT 2834 if (should_inject_error) { 2835 if (TracePageSizes && Verbose) { 2836 tty->print_cr("Reserving pages individually failed."); 2837 } 2838 } 2839#endif 2840 return NULL; 2841 } 2842 bytes_remaining -= bytes_to_rq; 2843 next_alloc_addr += bytes_to_rq; 2844 count++; 2845 } 2846 // made it this far, success 2847 return p_buf; 2848} 2849 2850 2851 2852void os::large_page_init() { 2853 if (!UseLargePages) return; 2854 2855 // print a warning if any large page related flag is specified on command line 2856 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2857 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2858 bool success = false; 2859 2860# define WARN(msg) if (warn_on_failure) { warning(msg); } 2861 if (resolve_functions_for_large_page_init()) { 2862 if (request_lock_memory_privilege()) { 2863 size_t s = os::Kernel32Dll::GetLargePageMinimum(); 2864 if (s) { 2865#if defined(IA32) || defined(AMD64) 2866 if (s > 4*M || LargePageSizeInBytes > 4*M) { 2867 WARN("JVM cannot use large pages bigger than 4mb."); 2868 } else { 2869#endif 2870 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { 2871 _large_page_size = LargePageSizeInBytes; 2872 } else { 2873 _large_page_size = s; 2874 } 2875 success = true; 2876#if defined(IA32) || defined(AMD64) 2877 } 2878#endif 2879 } else { 2880 WARN("Large page is not supported by the processor."); 2881 } 2882 } else { 2883 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); 2884 } 2885 } else { 2886 WARN("Large page is not supported by the operating system."); 2887 } 2888#undef WARN 2889 2890 const size_t default_page_size = (size_t) vm_page_size(); 2891 if (success && _large_page_size > default_page_size) { 2892 _page_sizes[0] = _large_page_size; 2893 _page_sizes[1] = default_page_size; 2894 _page_sizes[2] = 0; 2895 } 2896 2897 cleanup_after_large_page_init(); 2898 UseLargePages = success; 2899} 2900 2901// On win32, one cannot release just a part of reserved memory, it's an 2902// all or nothing deal. When we split a reservation, we must break the 2903// reservation into two reservations. 2904void os::split_reserved_memory(char *base, size_t size, size_t split, 2905 bool realloc) { 2906 if (size > 0) { 2907 release_memory(base, size); 2908 if (realloc) { 2909 reserve_memory(split, base); 2910 } 2911 if (size != split) { 2912 reserve_memory(size - split, base + split); 2913 } 2914 } 2915} 2916 2917char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { 2918 assert((size_t)addr % os::vm_allocation_granularity() == 0, 2919 "reserve alignment"); 2920 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); 2921 char* res; 2922 // note that if UseLargePages is on, all the areas that require interleaving 2923 // will go thru reserve_memory_special rather than thru here. 2924 bool use_individual = (UseNUMAInterleaving && !UseLargePages); 2925 if (!use_individual) { 2926 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); 2927 } else { 2928 elapsedTimer reserveTimer; 2929 if( Verbose && PrintMiscellaneous ) reserveTimer.start(); 2930 // in numa interleaving, we have to allocate pages individually 2931 // (well really chunks of NUMAInterleaveGranularity size) 2932 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE); 2933 if (res == NULL) { 2934 warning("NUMA page allocation failed"); 2935 } 2936 if( Verbose && PrintMiscellaneous ) { 2937 reserveTimer.stop(); 2938 tty->print_cr("reserve_memory of %Ix bytes took %ld ms (%ld ticks)", bytes, 2939 reserveTimer.milliseconds(), reserveTimer.ticks()); 2940 } 2941 } 2942 assert(res == NULL || addr == NULL || addr == res, 2943 "Unexpected address from reserve."); 2944 2945 return res; 2946} 2947 2948// Reserve memory at an arbitrary address, only if that area is 2949// available (and not reserved for something else). 2950char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2951 // Windows os::reserve_memory() fails of the requested address range is 2952 // not avilable. 2953 return reserve_memory(bytes, requested_addr); 2954} 2955 2956size_t os::large_page_size() { 2957 return _large_page_size; 2958} 2959 2960bool os::can_commit_large_page_memory() { 2961 // Windows only uses large page memory when the entire region is reserved 2962 // and committed in a single VirtualAlloc() call. This may change in the 2963 // future, but with Windows 2003 it's not possible to commit on demand. 2964 return false; 2965} 2966 2967bool os::can_execute_large_page_memory() { 2968 return true; 2969} 2970 2971char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { 2972 2973 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; 2974 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 2975 2976 // with large pages, there are two cases where we need to use Individual Allocation 2977 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003) 2978 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page 2979 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) { 2980 if (TracePageSizes && Verbose) { 2981 tty->print_cr("Reserving large pages individually."); 2982 } 2983 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError); 2984 if (p_buf == NULL) { 2985 // give an appropriate warning message 2986 if (UseNUMAInterleaving) { 2987 warning("NUMA large page allocation failed, UseLargePages flag ignored"); 2988 } 2989 if (UseLargePagesIndividualAllocation) { 2990 warning("Individually allocated large pages failed, " 2991 "use -XX:-UseLargePagesIndividualAllocation to turn off"); 2992 } 2993 return NULL; 2994 } 2995 2996 return p_buf; 2997 2998 } else { 2999 // normal policy just allocate it all at once 3000 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 3001 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); 3002 return res; 3003 } 3004} 3005 3006bool os::release_memory_special(char* base, size_t bytes) { 3007 return release_memory(base, bytes); 3008} 3009 3010void os::print_statistics() { 3011} 3012 3013bool os::commit_memory(char* addr, size_t bytes, bool exec) { 3014 if (bytes == 0) { 3015 // Don't bother the OS with noops. 3016 return true; 3017 } 3018 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); 3019 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); 3020 // Don't attempt to print anything if the OS call fails. We're 3021 // probably low on resources, so the print itself may cause crashes. 3022 3023 // unless we have NUMAInterleaving enabled, the range of a commit 3024 // is always within a reserve covered by a single VirtualAlloc 3025 // in that case we can just do a single commit for the requested size 3026 if (!UseNUMAInterleaving) { 3027 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false; 3028 if (exec) { 3029 DWORD oldprot; 3030 // Windows doc says to use VirtualProtect to get execute permissions 3031 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false; 3032 } 3033 return true; 3034 } else { 3035 3036 // when NUMAInterleaving is enabled, the commit might cover a range that 3037 // came from multiple VirtualAlloc reserves (using allocate_pages_individually). 3038 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery 3039 // returns represents the number of bytes that can be committed in one step. 3040 size_t bytes_remaining = bytes; 3041 char * next_alloc_addr = addr; 3042 while (bytes_remaining > 0) { 3043 MEMORY_BASIC_INFORMATION alloc_info; 3044 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info)); 3045 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize); 3046 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL) 3047 return false; 3048 if (exec) { 3049 DWORD oldprot; 3050 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot)) 3051 return false; 3052 } 3053 bytes_remaining -= bytes_to_rq; 3054 next_alloc_addr += bytes_to_rq; 3055 } 3056 } 3057 // if we made it this far, return true 3058 return true; 3059} 3060 3061bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, 3062 bool exec) { 3063 return commit_memory(addr, size, exec); 3064} 3065 3066bool os::uncommit_memory(char* addr, size_t bytes) { 3067 if (bytes == 0) { 3068 // Don't bother the OS with noops. 3069 return true; 3070 } 3071 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); 3072 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); 3073 return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0; 3074} 3075 3076bool os::release_memory(char* addr, size_t bytes) { 3077 return VirtualFree(addr, 0, MEM_RELEASE) != 0; 3078} 3079 3080bool os::create_stack_guard_pages(char* addr, size_t size) { 3081 return os::commit_memory(addr, size); 3082} 3083 3084bool os::remove_stack_guard_pages(char* addr, size_t size) { 3085 return os::uncommit_memory(addr, size); 3086} 3087 3088// Set protections specified 3089bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3090 bool is_committed) { 3091 unsigned int p = 0; 3092 switch (prot) { 3093 case MEM_PROT_NONE: p = PAGE_NOACCESS; break; 3094 case MEM_PROT_READ: p = PAGE_READONLY; break; 3095 case MEM_PROT_RW: p = PAGE_READWRITE; break; 3096 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; 3097 default: 3098 ShouldNotReachHere(); 3099 } 3100 3101 DWORD old_status; 3102 3103 // Strange enough, but on Win32 one can change protection only for committed 3104 // memory, not a big deal anyway, as bytes less or equal than 64K 3105 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { 3106 fatal("cannot commit protection page"); 3107 } 3108 // One cannot use os::guard_memory() here, as on Win32 guard page 3109 // have different (one-shot) semantics, from MSDN on PAGE_GUARD: 3110 // 3111 // Pages in the region become guard pages. Any attempt to access a guard page 3112 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off 3113 // the guard page status. Guard pages thus act as a one-time access alarm. 3114 return VirtualProtect(addr, bytes, p, &old_status) != 0; 3115} 3116 3117bool os::guard_memory(char* addr, size_t bytes) { 3118 DWORD old_status; 3119 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; 3120} 3121 3122bool os::unguard_memory(char* addr, size_t bytes) { 3123 DWORD old_status; 3124 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; 3125} 3126 3127void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3128void os::free_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3129void os::numa_make_global(char *addr, size_t bytes) { } 3130void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } 3131bool os::numa_topology_changed() { return false; } 3132size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); } 3133int os::numa_get_group_id() { return 0; } 3134size_t os::numa_get_leaf_groups(int *ids, size_t size) { 3135 if (numa_node_list_holder.get_count() == 0 && size > 0) { 3136 // Provide an answer for UMA systems 3137 ids[0] = 0; 3138 return 1; 3139 } else { 3140 // check for size bigger than actual groups_num 3141 size = MIN2(size, numa_get_groups_num()); 3142 for (int i = 0; i < (int)size; i++) { 3143 ids[i] = numa_node_list_holder.get_node_list_entry(i); 3144 } 3145 return size; 3146 } 3147} 3148 3149bool os::get_page_info(char *start, page_info* info) { 3150 return false; 3151} 3152 3153char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 3154 return end; 3155} 3156 3157char* os::non_memory_address_word() { 3158 // Must never look like an address returned by reserve_memory, 3159 // even in its subfields (as defined by the CPU immediate fields, 3160 // if the CPU splits constants across multiple instructions). 3161 return (char*)-1; 3162} 3163 3164#define MAX_ERROR_COUNT 100 3165#define SYS_THREAD_ERROR 0xffffffffUL 3166 3167void os::pd_start_thread(Thread* thread) { 3168 DWORD ret = ResumeThread(thread->osthread()->thread_handle()); 3169 // Returns previous suspend state: 3170 // 0: Thread was not suspended 3171 // 1: Thread is running now 3172 // >1: Thread is still suspended. 3173 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back 3174} 3175 3176class HighResolutionInterval { 3177 // The default timer resolution seems to be 10 milliseconds. 3178 // (Where is this written down?) 3179 // If someone wants to sleep for only a fraction of the default, 3180 // then we set the timer resolution down to 1 millisecond for 3181 // the duration of their interval. 3182 // We carefully set the resolution back, since otherwise we 3183 // seem to incur an overhead (3%?) that we don't need. 3184 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. 3185 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). 3186 // Alternatively, we could compute the relative error (503/500 = .6%) and only use 3187 // timeBeginPeriod() if the relative error exceeded some threshold. 3188 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and 3189 // to decreased efficiency related to increased timer "tick" rates. We want to minimize 3190 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high 3191 // resolution timers running. 3192private: 3193 jlong resolution; 3194public: 3195 HighResolutionInterval(jlong ms) { 3196 resolution = ms % 10L; 3197 if (resolution != 0) { 3198 MMRESULT result = timeBeginPeriod(1L); 3199 } 3200 } 3201 ~HighResolutionInterval() { 3202 if (resolution != 0) { 3203 MMRESULT result = timeEndPeriod(1L); 3204 } 3205 resolution = 0L; 3206 } 3207}; 3208 3209int os::sleep(Thread* thread, jlong ms, bool interruptable) { 3210 jlong limit = (jlong) MAXDWORD; 3211 3212 while(ms > limit) { 3213 int res; 3214 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) 3215 return res; 3216 ms -= limit; 3217 } 3218 3219 assert(thread == Thread::current(), "thread consistency check"); 3220 OSThread* osthread = thread->osthread(); 3221 OSThreadWaitState osts(osthread, false /* not Object.wait() */); 3222 int result; 3223 if (interruptable) { 3224 assert(thread->is_Java_thread(), "must be java thread"); 3225 JavaThread *jt = (JavaThread *) thread; 3226 ThreadBlockInVM tbivm(jt); 3227 3228 jt->set_suspend_equivalent(); 3229 // cleared by handle_special_suspend_equivalent_condition() or 3230 // java_suspend_self() via check_and_wait_while_suspended() 3231 3232 HANDLE events[1]; 3233 events[0] = osthread->interrupt_event(); 3234 HighResolutionInterval *phri=NULL; 3235 if(!ForceTimeHighResolution) 3236 phri = new HighResolutionInterval( ms ); 3237 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { 3238 result = OS_TIMEOUT; 3239 } else { 3240 ResetEvent(osthread->interrupt_event()); 3241 osthread->set_interrupted(false); 3242 result = OS_INTRPT; 3243 } 3244 delete phri; //if it is NULL, harmless 3245 3246 // were we externally suspended while we were waiting? 3247 jt->check_and_wait_while_suspended(); 3248 } else { 3249 assert(!thread->is_Java_thread(), "must not be java thread"); 3250 Sleep((long) ms); 3251 result = OS_TIMEOUT; 3252 } 3253 return result; 3254} 3255 3256// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3257void os::infinite_sleep() { 3258 while (true) { // sleep forever ... 3259 Sleep(100000); // ... 100 seconds at a time 3260 } 3261} 3262 3263typedef BOOL (WINAPI * STTSignature)(void) ; 3264 3265os::YieldResult os::NakedYield() { 3266 // Use either SwitchToThread() or Sleep(0) 3267 // Consider passing back the return value from SwitchToThread(). 3268 if (os::Kernel32Dll::SwitchToThreadAvailable()) { 3269 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; 3270 } else { 3271 Sleep(0); 3272 } 3273 return os::YIELD_UNKNOWN ; 3274} 3275 3276void os::yield() { os::NakedYield(); } 3277 3278void os::yield_all(int attempts) { 3279 // Yields to all threads, including threads with lower priorities 3280 Sleep(1); 3281} 3282 3283// Win32 only gives you access to seven real priorities at a time, 3284// so we compress Java's ten down to seven. It would be better 3285// if we dynamically adjusted relative priorities. 3286 3287int os::java_to_os_priority[CriticalPriority + 1] = { 3288 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3289 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3290 THREAD_PRIORITY_LOWEST, // 2 3291 THREAD_PRIORITY_BELOW_NORMAL, // 3 3292 THREAD_PRIORITY_BELOW_NORMAL, // 4 3293 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3294 THREAD_PRIORITY_NORMAL, // 6 3295 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3296 THREAD_PRIORITY_ABOVE_NORMAL, // 8 3297 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3298 THREAD_PRIORITY_HIGHEST, // 10 MaxPriority 3299 THREAD_PRIORITY_HIGHEST // 11 CriticalPriority 3300}; 3301 3302int prio_policy1[CriticalPriority + 1] = { 3303 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3304 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3305 THREAD_PRIORITY_LOWEST, // 2 3306 THREAD_PRIORITY_BELOW_NORMAL, // 3 3307 THREAD_PRIORITY_BELOW_NORMAL, // 4 3308 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3309 THREAD_PRIORITY_ABOVE_NORMAL, // 6 3310 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3311 THREAD_PRIORITY_HIGHEST, // 8 3312 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3313 THREAD_PRIORITY_TIME_CRITICAL, // 10 MaxPriority 3314 THREAD_PRIORITY_TIME_CRITICAL // 11 CriticalPriority 3315}; 3316 3317static int prio_init() { 3318 // If ThreadPriorityPolicy is 1, switch tables 3319 if (ThreadPriorityPolicy == 1) { 3320 int i; 3321 for (i = 0; i < CriticalPriority + 1; i++) { 3322 os::java_to_os_priority[i] = prio_policy1[i]; 3323 } 3324 } 3325 if (UseCriticalJavaThreadPriority) { 3326 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority] ; 3327 } 3328 return 0; 3329} 3330 3331OSReturn os::set_native_priority(Thread* thread, int priority) { 3332 if (!UseThreadPriorities) return OS_OK; 3333 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; 3334 return ret ? OS_OK : OS_ERR; 3335} 3336 3337OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { 3338 if ( !UseThreadPriorities ) { 3339 *priority_ptr = java_to_os_priority[NormPriority]; 3340 return OS_OK; 3341 } 3342 int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); 3343 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { 3344 assert(false, "GetThreadPriority failed"); 3345 return OS_ERR; 3346 } 3347 *priority_ptr = os_prio; 3348 return OS_OK; 3349} 3350 3351 3352// Hint to the underlying OS that a task switch would not be good. 3353// Void return because it's a hint and can fail. 3354void os::hint_no_preempt() {} 3355 3356void os::interrupt(Thread* thread) { 3357 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3358 "possibility of dangling Thread pointer"); 3359 3360 OSThread* osthread = thread->osthread(); 3361 osthread->set_interrupted(true); 3362 // More than one thread can get here with the same value of osthread, 3363 // resulting in multiple notifications. We do, however, want the store 3364 // to interrupted() to be visible to other threads before we post 3365 // the interrupt event. 3366 OrderAccess::release(); 3367 SetEvent(osthread->interrupt_event()); 3368 // For JSR166: unpark after setting status 3369 if (thread->is_Java_thread()) 3370 ((JavaThread*)thread)->parker()->unpark(); 3371 3372 ParkEvent * ev = thread->_ParkEvent ; 3373 if (ev != NULL) ev->unpark() ; 3374 3375} 3376 3377 3378bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3379 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3380 "possibility of dangling Thread pointer"); 3381 3382 OSThread* osthread = thread->osthread(); 3383 bool interrupted = osthread->interrupted(); 3384 // There is no synchronization between the setting of the interrupt 3385 // and it being cleared here. It is critical - see 6535709 - that 3386 // we only clear the interrupt state, and reset the interrupt event, 3387 // if we are going to report that we were indeed interrupted - else 3388 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups 3389 // depending on the timing 3390 if (interrupted && clear_interrupted) { 3391 osthread->set_interrupted(false); 3392 ResetEvent(osthread->interrupt_event()); 3393 } // Otherwise leave the interrupted state alone 3394 3395 return interrupted; 3396} 3397 3398// Get's a pc (hint) for a running thread. Currently used only for profiling. 3399ExtendedPC os::get_thread_pc(Thread* thread) { 3400 CONTEXT context; 3401 context.ContextFlags = CONTEXT_CONTROL; 3402 HANDLE handle = thread->osthread()->thread_handle(); 3403#ifdef _M_IA64 3404 assert(0, "Fix get_thread_pc"); 3405 return ExtendedPC(NULL); 3406#else 3407 if (GetThreadContext(handle, &context)) { 3408#ifdef _M_AMD64 3409 return ExtendedPC((address) context.Rip); 3410#else 3411 return ExtendedPC((address) context.Eip); 3412#endif 3413 } else { 3414 return ExtendedPC(NULL); 3415 } 3416#endif 3417} 3418 3419// GetCurrentThreadId() returns DWORD 3420intx os::current_thread_id() { return GetCurrentThreadId(); } 3421 3422static int _initial_pid = 0; 3423 3424int os::current_process_id() 3425{ 3426 return (_initial_pid ? _initial_pid : _getpid()); 3427} 3428 3429int os::win32::_vm_page_size = 0; 3430int os::win32::_vm_allocation_granularity = 0; 3431int os::win32::_processor_type = 0; 3432// Processor level is not available on non-NT systems, use vm_version instead 3433int os::win32::_processor_level = 0; 3434julong os::win32::_physical_memory = 0; 3435size_t os::win32::_default_stack_size = 0; 3436 3437 intx os::win32::_os_thread_limit = 0; 3438volatile intx os::win32::_os_thread_count = 0; 3439 3440bool os::win32::_is_nt = false; 3441bool os::win32::_is_windows_2003 = false; 3442bool os::win32::_is_windows_server = false; 3443 3444void os::win32::initialize_system_info() { 3445 SYSTEM_INFO si; 3446 GetSystemInfo(&si); 3447 _vm_page_size = si.dwPageSize; 3448 _vm_allocation_granularity = si.dwAllocationGranularity; 3449 _processor_type = si.dwProcessorType; 3450 _processor_level = si.wProcessorLevel; 3451 set_processor_count(si.dwNumberOfProcessors); 3452 3453 MEMORYSTATUSEX ms; 3454 ms.dwLength = sizeof(ms); 3455 3456 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, 3457 // dwMemoryLoad (% of memory in use) 3458 GlobalMemoryStatusEx(&ms); 3459 _physical_memory = ms.ullTotalPhys; 3460 3461 OSVERSIONINFOEX oi; 3462 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 3463 GetVersionEx((OSVERSIONINFO*)&oi); 3464 switch(oi.dwPlatformId) { 3465 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; 3466 case VER_PLATFORM_WIN32_NT: 3467 _is_nt = true; 3468 { 3469 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; 3470 if (os_vers == 5002) { 3471 _is_windows_2003 = true; 3472 } 3473 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER || 3474 oi.wProductType == VER_NT_SERVER) { 3475 _is_windows_server = true; 3476 } 3477 } 3478 break; 3479 default: fatal("Unknown platform"); 3480 } 3481 3482 _default_stack_size = os::current_stack_size(); 3483 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); 3484 assert((_default_stack_size & (_vm_page_size - 1)) == 0, 3485 "stack size not a multiple of page size"); 3486 3487 initialize_performance_counter(); 3488 3489 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is 3490 // known to deadlock the system, if the VM issues to thread operations with 3491 // a too high frequency, e.g., such as changing the priorities. 3492 // The 6000 seems to work well - no deadlocks has been notices on the test 3493 // programs that we have seen experience this problem. 3494 if (!os::win32::is_nt()) { 3495 StarvationMonitorInterval = 6000; 3496 } 3497} 3498 3499 3500HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) { 3501 char path[MAX_PATH]; 3502 DWORD size; 3503 DWORD pathLen = (DWORD)sizeof(path); 3504 HINSTANCE result = NULL; 3505 3506 // only allow library name without path component 3507 assert(strchr(name, '\\') == NULL, "path not allowed"); 3508 assert(strchr(name, ':') == NULL, "path not allowed"); 3509 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) { 3510 jio_snprintf(ebuf, ebuflen, 3511 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name); 3512 return NULL; 3513 } 3514 3515 // search system directory 3516 if ((size = GetSystemDirectory(path, pathLen)) > 0) { 3517 strcat(path, "\\"); 3518 strcat(path, name); 3519 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3520 return result; 3521 } 3522 } 3523 3524 // try Windows directory 3525 if ((size = GetWindowsDirectory(path, pathLen)) > 0) { 3526 strcat(path, "\\"); 3527 strcat(path, name); 3528 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3529 return result; 3530 } 3531 } 3532 3533 jio_snprintf(ebuf, ebuflen, 3534 "os::win32::load_windows_dll() cannot load %s from system directories.", name); 3535 return NULL; 3536} 3537 3538void os::win32::setmode_streams() { 3539 _setmode(_fileno(stdin), _O_BINARY); 3540 _setmode(_fileno(stdout), _O_BINARY); 3541 _setmode(_fileno(stderr), _O_BINARY); 3542} 3543 3544 3545bool os::is_debugger_attached() { 3546 return IsDebuggerPresent() ? true : false; 3547} 3548 3549 3550void os::wait_for_keypress_at_exit(void) { 3551 if (PauseAtExit) { 3552 fprintf(stderr, "Press any key to continue...\n"); 3553 fgetc(stdin); 3554 } 3555} 3556 3557 3558int os::message_box(const char* title, const char* message) { 3559 int result = MessageBox(NULL, message, title, 3560 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); 3561 return result == IDYES; 3562} 3563 3564int os::allocate_thread_local_storage() { 3565 return TlsAlloc(); 3566} 3567 3568 3569void os::free_thread_local_storage(int index) { 3570 TlsFree(index); 3571} 3572 3573 3574void os::thread_local_storage_at_put(int index, void* value) { 3575 TlsSetValue(index, value); 3576 assert(thread_local_storage_at(index) == value, "Just checking"); 3577} 3578 3579 3580void* os::thread_local_storage_at(int index) { 3581 return TlsGetValue(index); 3582} 3583 3584 3585#ifndef PRODUCT 3586#ifndef _WIN64 3587// Helpers to check whether NX protection is enabled 3588int nx_exception_filter(_EXCEPTION_POINTERS *pex) { 3589 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 3590 pex->ExceptionRecord->NumberParameters > 0 && 3591 pex->ExceptionRecord->ExceptionInformation[0] == 3592 EXCEPTION_INFO_EXEC_VIOLATION) { 3593 return EXCEPTION_EXECUTE_HANDLER; 3594 } 3595 return EXCEPTION_CONTINUE_SEARCH; 3596} 3597 3598void nx_check_protection() { 3599 // If NX is enabled we'll get an exception calling into code on the stack 3600 char code[] = { (char)0xC3 }; // ret 3601 void *code_ptr = (void *)code; 3602 __try { 3603 __asm call code_ptr 3604 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { 3605 tty->print_raw_cr("NX protection detected."); 3606 } 3607} 3608#endif // _WIN64 3609#endif // PRODUCT 3610 3611// this is called _before_ the global arguments have been parsed 3612void os::init(void) { 3613 _initial_pid = _getpid(); 3614 3615 init_random(1234567); 3616 3617 win32::initialize_system_info(); 3618 win32::setmode_streams(); 3619 init_page_sizes((size_t) win32::vm_page_size()); 3620 3621 // For better scalability on MP systems (must be called after initialize_system_info) 3622#ifndef PRODUCT 3623 if (is_MP()) { 3624 NoYieldsInMicrolock = true; 3625 } 3626#endif 3627 // This may be overridden later when argument processing is done. 3628 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, 3629 os::win32::is_windows_2003()); 3630 3631 // Initialize main_process and main_thread 3632 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle 3633 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, 3634 &main_thread, THREAD_ALL_ACCESS, false, 0)) { 3635 fatal("DuplicateHandle failed\n"); 3636 } 3637 main_thread_id = (int) GetCurrentThreadId(); 3638} 3639 3640// To install functions for atexit processing 3641extern "C" { 3642 static void perfMemory_exit_helper() { 3643 perfMemory_exit(); 3644 } 3645} 3646 3647// this is called _after_ the global arguments have been parsed 3648jint os::init_2(void) { 3649 // Allocate a single page and mark it as readable for safepoint polling 3650 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); 3651 guarantee( polling_page != NULL, "Reserve Failed for polling page"); 3652 3653 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); 3654 guarantee( return_page != NULL, "Commit Failed for polling page"); 3655 3656 os::set_polling_page( polling_page ); 3657 3658#ifndef PRODUCT 3659 if( Verbose && PrintMiscellaneous ) 3660 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 3661#endif 3662 3663 if (!UseMembar) { 3664 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); 3665 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); 3666 3667 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); 3668 guarantee( return_page != NULL, "Commit Failed for memory serialize page"); 3669 3670 os::set_memory_serialize_page( mem_serialize_page ); 3671 3672#ifndef PRODUCT 3673 if(Verbose && PrintMiscellaneous) 3674 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 3675#endif 3676 } 3677 3678 os::large_page_init(); 3679 3680 // Setup Windows Exceptions 3681 3682 // On Itanium systems, Structured Exception Handling does not 3683 // work since stack frames must be walkable by the OS. Since 3684 // much of our code is dynamically generated, and we do not have 3685 // proper unwind .xdata sections, the system simply exits 3686 // rather than delivering the exception. To work around 3687 // this we use VectorExceptions instead. 3688#ifdef _WIN64 3689 if (UseVectoredExceptions) { 3690 topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter); 3691 } 3692#endif 3693 3694 // for debugging float code generation bugs 3695 if (ForceFloatExceptions) { 3696#ifndef _WIN64 3697 static long fp_control_word = 0; 3698 __asm { fstcw fp_control_word } 3699 // see Intel PPro Manual, Vol. 2, p 7-16 3700 const long precision = 0x20; 3701 const long underflow = 0x10; 3702 const long overflow = 0x08; 3703 const long zero_div = 0x04; 3704 const long denorm = 0x02; 3705 const long invalid = 0x01; 3706 fp_control_word |= invalid; 3707 __asm { fldcw fp_control_word } 3708#endif 3709 } 3710 3711 // If stack_commit_size is 0, windows will reserve the default size, 3712 // but only commit a small portion of it. 3713 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); 3714 size_t default_reserve_size = os::win32::default_stack_size(); 3715 size_t actual_reserve_size = stack_commit_size; 3716 if (stack_commit_size < default_reserve_size) { 3717 // If stack_commit_size == 0, we want this too 3718 actual_reserve_size = default_reserve_size; 3719 } 3720 3721 // Check minimum allowable stack size for thread creation and to initialize 3722 // the java system classes, including StackOverflowError - depends on page 3723 // size. Add a page for compiler2 recursion in main thread. 3724 // Add in 2*BytesPerWord times page size to account for VM stack during 3725 // class initialization depending on 32 or 64 bit VM. 3726 size_t min_stack_allowed = 3727 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 3728 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size(); 3729 if (actual_reserve_size < min_stack_allowed) { 3730 tty->print_cr("\nThe stack size specified is too small, " 3731 "Specify at least %dk", 3732 min_stack_allowed / K); 3733 return JNI_ERR; 3734 } 3735 3736 JavaThread::set_stack_size_at_create(stack_commit_size); 3737 3738 // Calculate theoretical max. size of Threads to guard gainst artifical 3739 // out-of-memory situations, where all available address-space has been 3740 // reserved by thread stacks. 3741 assert(actual_reserve_size != 0, "Must have a stack"); 3742 3743 // Calculate the thread limit when we should start doing Virtual Memory 3744 // banging. Currently when the threads will have used all but 200Mb of space. 3745 // 3746 // TODO: consider performing a similar calculation for commit size instead 3747 // as reserve size, since on a 64-bit platform we'll run into that more 3748 // often than running out of virtual memory space. We can use the 3749 // lower value of the two calculations as the os_thread_limit. 3750 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); 3751 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); 3752 3753 // at exit methods are called in the reverse order of their registration. 3754 // there is no limit to the number of functions registered. atexit does 3755 // not set errno. 3756 3757 if (PerfAllowAtExitRegistration) { 3758 // only register atexit functions if PerfAllowAtExitRegistration is set. 3759 // atexit functions can be delayed until process exit time, which 3760 // can be problematic for embedded VM situations. Embedded VMs should 3761 // call DestroyJavaVM() to assure that VM resources are released. 3762 3763 // note: perfMemory_exit_helper atexit function may be removed in 3764 // the future if the appropriate cleanup code can be added to the 3765 // VM_Exit VMOperation's doit method. 3766 if (atexit(perfMemory_exit_helper) != 0) { 3767 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); 3768 } 3769 } 3770 3771#ifndef _WIN64 3772 // Print something if NX is enabled (win32 on AMD64) 3773 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); 3774#endif 3775 3776 // initialize thread priority policy 3777 prio_init(); 3778 3779 if (UseNUMA && !ForceNUMA) { 3780 UseNUMA = false; // We don't fully support this yet 3781 } 3782 3783 if (UseNUMAInterleaving) { 3784 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag 3785 bool success = numa_interleaving_init(); 3786 if (!success) UseNUMAInterleaving = false; 3787 } 3788 3789 return JNI_OK; 3790} 3791 3792void os::init_3(void) { 3793 return; 3794} 3795 3796// Mark the polling page as unreadable 3797void os::make_polling_page_unreadable(void) { 3798 DWORD old_status; 3799 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) 3800 fatal("Could not disable polling page"); 3801}; 3802 3803// Mark the polling page as readable 3804void os::make_polling_page_readable(void) { 3805 DWORD old_status; 3806 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) 3807 fatal("Could not enable polling page"); 3808}; 3809 3810 3811int os::stat(const char *path, struct stat *sbuf) { 3812 char pathbuf[MAX_PATH]; 3813 if (strlen(path) > MAX_PATH - 1) { 3814 errno = ENAMETOOLONG; 3815 return -1; 3816 } 3817 os::native_path(strcpy(pathbuf, path)); 3818 int ret = ::stat(pathbuf, sbuf); 3819 if (sbuf != NULL && UseUTCFileTimestamp) { 3820 // Fix for 6539723. st_mtime returned from stat() is dependent on 3821 // the system timezone and so can return different values for the 3822 // same file if/when daylight savings time changes. This adjustment 3823 // makes sure the same timestamp is returned regardless of the TZ. 3824 // 3825 // See: 3826 // http://msdn.microsoft.com/library/ 3827 // default.asp?url=/library/en-us/sysinfo/base/ 3828 // time_zone_information_str.asp 3829 // and 3830 // http://msdn.microsoft.com/library/default.asp?url= 3831 // /library/en-us/sysinfo/base/settimezoneinformation.asp 3832 // 3833 // NOTE: there is a insidious bug here: If the timezone is changed 3834 // after the call to stat() but before 'GetTimeZoneInformation()', then 3835 // the adjustment we do here will be wrong and we'll return the wrong 3836 // value (which will likely end up creating an invalid class data 3837 // archive). Absent a better API for this, or some time zone locking 3838 // mechanism, we'll have to live with this risk. 3839 TIME_ZONE_INFORMATION tz; 3840 DWORD tzid = GetTimeZoneInformation(&tz); 3841 int daylightBias = 3842 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; 3843 sbuf->st_mtime += (tz.Bias + daylightBias) * 60; 3844 } 3845 return ret; 3846} 3847 3848 3849#define FT2INT64(ft) \ 3850 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) 3851 3852 3853// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 3854// are used by JVM M&M and JVMTI to get user+sys or user CPU time 3855// of a thread. 3856// 3857// current_thread_cpu_time() and thread_cpu_time(Thread*) returns 3858// the fast estimate available on the platform. 3859 3860// current_thread_cpu_time() is not optimized for Windows yet 3861jlong os::current_thread_cpu_time() { 3862 // return user + sys since the cost is the same 3863 return os::thread_cpu_time(Thread::current(), true /* user+sys */); 3864} 3865 3866jlong os::thread_cpu_time(Thread* thread) { 3867 // consistent with what current_thread_cpu_time() returns. 3868 return os::thread_cpu_time(thread, true /* user+sys */); 3869} 3870 3871jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 3872 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 3873} 3874 3875jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { 3876 // This code is copy from clasic VM -> hpi::sysThreadCPUTime 3877 // If this function changes, os::is_thread_cpu_time_supported() should too 3878 if (os::win32::is_nt()) { 3879 FILETIME CreationTime; 3880 FILETIME ExitTime; 3881 FILETIME KernelTime; 3882 FILETIME UserTime; 3883 3884 if ( GetThreadTimes(thread->osthread()->thread_handle(), 3885 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3886 return -1; 3887 else 3888 if (user_sys_cpu_time) { 3889 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; 3890 } else { 3891 return FT2INT64(UserTime) * 100; 3892 } 3893 } else { 3894 return (jlong) timeGetTime() * 1000000; 3895 } 3896} 3897 3898void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3899 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3900 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3901 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3902 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3903} 3904 3905void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3906 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3907 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3908 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3909 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3910} 3911 3912bool os::is_thread_cpu_time_supported() { 3913 // see os::thread_cpu_time 3914 if (os::win32::is_nt()) { 3915 FILETIME CreationTime; 3916 FILETIME ExitTime; 3917 FILETIME KernelTime; 3918 FILETIME UserTime; 3919 3920 if ( GetThreadTimes(GetCurrentThread(), 3921 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3922 return false; 3923 else 3924 return true; 3925 } else { 3926 return false; 3927 } 3928} 3929 3930// Windows does't provide a loadavg primitive so this is stubbed out for now. 3931// It does have primitives (PDH API) to get CPU usage and run queue length. 3932// "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" 3933// If we wanted to implement loadavg on Windows, we have a few options: 3934// 3935// a) Query CPU usage and run queue length and "fake" an answer by 3936// returning the CPU usage if it's under 100%, and the run queue 3937// length otherwise. It turns out that querying is pretty slow 3938// on Windows, on the order of 200 microseconds on a fast machine. 3939// Note that on the Windows the CPU usage value is the % usage 3940// since the last time the API was called (and the first call 3941// returns 100%), so we'd have to deal with that as well. 3942// 3943// b) Sample the "fake" answer using a sampling thread and store 3944// the answer in a global variable. The call to loadavg would 3945// just return the value of the global, avoiding the slow query. 3946// 3947// c) Sample a better answer using exponential decay to smooth the 3948// value. This is basically the algorithm used by UNIX kernels. 3949// 3950// Note that sampling thread starvation could affect both (b) and (c). 3951int os::loadavg(double loadavg[], int nelem) { 3952 return -1; 3953} 3954 3955 3956// DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() 3957bool os::dont_yield() { 3958 return DontYieldALot; 3959} 3960 3961// This method is a slightly reworked copy of JDK's sysOpen 3962// from src/windows/hpi/src/sys_api_md.c 3963 3964int os::open(const char *path, int oflag, int mode) { 3965 char pathbuf[MAX_PATH]; 3966 3967 if (strlen(path) > MAX_PATH - 1) { 3968 errno = ENAMETOOLONG; 3969 return -1; 3970 } 3971 os::native_path(strcpy(pathbuf, path)); 3972 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode); 3973} 3974 3975// Is a (classpath) directory empty? 3976bool os::dir_is_empty(const char* path) { 3977 WIN32_FIND_DATA fd; 3978 HANDLE f = FindFirstFile(path, &fd); 3979 if (f == INVALID_HANDLE_VALUE) { 3980 return true; 3981 } 3982 FindClose(f); 3983 return false; 3984} 3985 3986// create binary file, rewriting existing file if required 3987int os::create_binary_file(const char* path, bool rewrite_existing) { 3988 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; 3989 if (!rewrite_existing) { 3990 oflags |= _O_EXCL; 3991 } 3992 return ::open(path, oflags, _S_IREAD | _S_IWRITE); 3993} 3994 3995// return current position of file pointer 3996jlong os::current_file_offset(int fd) { 3997 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); 3998} 3999 4000// move file pointer to the specified offset 4001jlong os::seek_to_file_offset(int fd, jlong offset) { 4002 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); 4003} 4004 4005 4006jlong os::lseek(int fd, jlong offset, int whence) { 4007 return (jlong) ::_lseeki64(fd, offset, whence); 4008} 4009 4010// This method is a slightly reworked copy of JDK's sysNativePath 4011// from src/windows/hpi/src/path_md.c 4012 4013/* Convert a pathname to native format. On win32, this involves forcing all 4014 separators to be '\\' rather than '/' (both are legal inputs, but Win95 4015 sometimes rejects '/') and removing redundant separators. The input path is 4016 assumed to have been converted into the character encoding used by the local 4017 system. Because this might be a double-byte encoding, care is taken to 4018 treat double-byte lead characters correctly. 4019 4020 This procedure modifies the given path in place, as the result is never 4021 longer than the original. There is no error return; this operation always 4022 succeeds. */ 4023char * os::native_path(char *path) { 4024 char *src = path, *dst = path, *end = path; 4025 char *colon = NULL; /* If a drive specifier is found, this will 4026 point to the colon following the drive 4027 letter */ 4028 4029 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */ 4030 assert(((!::IsDBCSLeadByte('/')) 4031 && (!::IsDBCSLeadByte('\\')) 4032 && (!::IsDBCSLeadByte(':'))), 4033 "Illegal lead byte"); 4034 4035 /* Check for leading separators */ 4036#define isfilesep(c) ((c) == '/' || (c) == '\\') 4037 while (isfilesep(*src)) { 4038 src++; 4039 } 4040 4041 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') { 4042 /* Remove leading separators if followed by drive specifier. This 4043 hack is necessary to support file URLs containing drive 4044 specifiers (e.g., "file://c:/path"). As a side effect, 4045 "/c:/path" can be used as an alternative to "c:/path". */ 4046 *dst++ = *src++; 4047 colon = dst; 4048 *dst++ = ':'; 4049 src++; 4050 } else { 4051 src = path; 4052 if (isfilesep(src[0]) && isfilesep(src[1])) { 4053 /* UNC pathname: Retain first separator; leave src pointed at 4054 second separator so that further separators will be collapsed 4055 into the second separator. The result will be a pathname 4056 beginning with "\\\\" followed (most likely) by a host name. */ 4057 src = dst = path + 1; 4058 path[0] = '\\'; /* Force first separator to '\\' */ 4059 } 4060 } 4061 4062 end = dst; 4063 4064 /* Remove redundant separators from remainder of path, forcing all 4065 separators to be '\\' rather than '/'. Also, single byte space 4066 characters are removed from the end of the path because those 4067 are not legal ending characters on this operating system. 4068 */ 4069 while (*src != '\0') { 4070 if (isfilesep(*src)) { 4071 *dst++ = '\\'; src++; 4072 while (isfilesep(*src)) src++; 4073 if (*src == '\0') { 4074 /* Check for trailing separator */ 4075 end = dst; 4076 if (colon == dst - 2) break; /* "z:\\" */ 4077 if (dst == path + 1) break; /* "\\" */ 4078 if (dst == path + 2 && isfilesep(path[0])) { 4079 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the 4080 beginning of a UNC pathname. Even though it is not, by 4081 itself, a valid UNC pathname, we leave it as is in order 4082 to be consistent with the path canonicalizer as well 4083 as the win32 APIs, which treat this case as an invalid 4084 UNC pathname rather than as an alias for the root 4085 directory of the current drive. */ 4086 break; 4087 } 4088 end = --dst; /* Path does not denote a root directory, so 4089 remove trailing separator */ 4090 break; 4091 } 4092 end = dst; 4093 } else { 4094 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */ 4095 *dst++ = *src++; 4096 if (*src) *dst++ = *src++; 4097 end = dst; 4098 } else { /* Copy a single-byte character */ 4099 char c = *src++; 4100 *dst++ = c; 4101 /* Space is not a legal ending character */ 4102 if (c != ' ') end = dst; 4103 } 4104 } 4105 } 4106 4107 *end = '\0'; 4108 4109 /* For "z:", add "." to work around a bug in the C runtime library */ 4110 if (colon == dst - 1) { 4111 path[2] = '.'; 4112 path[3] = '\0'; 4113 } 4114 4115 #ifdef DEBUG 4116 jio_fprintf(stderr, "sysNativePath: %s\n", path); 4117 #endif DEBUG 4118 return path; 4119} 4120 4121// This code is a copy of JDK's sysSetLength 4122// from src/windows/hpi/src/sys_api_md.c 4123 4124int os::ftruncate(int fd, jlong length) { 4125 HANDLE h = (HANDLE)::_get_osfhandle(fd); 4126 long high = (long)(length >> 32); 4127 DWORD ret; 4128 4129 if (h == (HANDLE)(-1)) { 4130 return -1; 4131 } 4132 4133 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN); 4134 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) { 4135 return -1; 4136 } 4137 4138 if (::SetEndOfFile(h) == FALSE) { 4139 return -1; 4140 } 4141 4142 return 0; 4143} 4144 4145 4146// This code is a copy of JDK's sysSync 4147// from src/windows/hpi/src/sys_api_md.c 4148// except for the legacy workaround for a bug in Win 98 4149 4150int os::fsync(int fd) { 4151 HANDLE handle = (HANDLE)::_get_osfhandle(fd); 4152 4153 if ( (!::FlushFileBuffers(handle)) && 4154 (GetLastError() != ERROR_ACCESS_DENIED) ) { 4155 /* from winerror.h */ 4156 return -1; 4157 } 4158 return 0; 4159} 4160 4161static int nonSeekAvailable(int, long *); 4162static int stdinAvailable(int, long *); 4163 4164#define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR) 4165#define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO) 4166 4167// This code is a copy of JDK's sysAvailable 4168// from src/windows/hpi/src/sys_api_md.c 4169 4170int os::available(int fd, jlong *bytes) { 4171 jlong cur, end; 4172 struct _stati64 stbuf64; 4173 4174 if (::_fstati64(fd, &stbuf64) >= 0) { 4175 int mode = stbuf64.st_mode; 4176 if (S_ISCHR(mode) || S_ISFIFO(mode)) { 4177 int ret; 4178 long lpbytes; 4179 if (fd == 0) { 4180 ret = stdinAvailable(fd, &lpbytes); 4181 } else { 4182 ret = nonSeekAvailable(fd, &lpbytes); 4183 } 4184 (*bytes) = (jlong)(lpbytes); 4185 return ret; 4186 } 4187 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) { 4188 return FALSE; 4189 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) { 4190 return FALSE; 4191 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) { 4192 return FALSE; 4193 } 4194 *bytes = end - cur; 4195 return TRUE; 4196 } else { 4197 return FALSE; 4198 } 4199} 4200 4201// This code is a copy of JDK's nonSeekAvailable 4202// from src/windows/hpi/src/sys_api_md.c 4203 4204static int nonSeekAvailable(int fd, long *pbytes) { 4205 /* This is used for available on non-seekable devices 4206 * (like both named and anonymous pipes, such as pipes 4207 * connected to an exec'd process). 4208 * Standard Input is a special case. 4209 * 4210 */ 4211 HANDLE han; 4212 4213 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) { 4214 return FALSE; 4215 } 4216 4217 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) { 4218 /* PeekNamedPipe fails when at EOF. In that case we 4219 * simply make *pbytes = 0 which is consistent with the 4220 * behavior we get on Solaris when an fd is at EOF. 4221 * The only alternative is to raise an Exception, 4222 * which isn't really warranted. 4223 */ 4224 if (::GetLastError() != ERROR_BROKEN_PIPE) { 4225 return FALSE; 4226 } 4227 *pbytes = 0; 4228 } 4229 return TRUE; 4230} 4231 4232#define MAX_INPUT_EVENTS 2000 4233 4234// This code is a copy of JDK's stdinAvailable 4235// from src/windows/hpi/src/sys_api_md.c 4236 4237static int stdinAvailable(int fd, long *pbytes) { 4238 HANDLE han; 4239 DWORD numEventsRead = 0; /* Number of events read from buffer */ 4240 DWORD numEvents = 0; /* Number of events in buffer */ 4241 DWORD i = 0; /* Loop index */ 4242 DWORD curLength = 0; /* Position marker */ 4243 DWORD actualLength = 0; /* Number of bytes readable */ 4244 BOOL error = FALSE; /* Error holder */ 4245 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */ 4246 4247 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) { 4248 return FALSE; 4249 } 4250 4251 /* Construct an array of input records in the console buffer */ 4252 error = ::GetNumberOfConsoleInputEvents(han, &numEvents); 4253 if (error == 0) { 4254 return nonSeekAvailable(fd, pbytes); 4255 } 4256 4257 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */ 4258 if (numEvents > MAX_INPUT_EVENTS) { 4259 numEvents = MAX_INPUT_EVENTS; 4260 } 4261 4262 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD)); 4263 if (lpBuffer == NULL) { 4264 return FALSE; 4265 } 4266 4267 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead); 4268 if (error == 0) { 4269 os::free(lpBuffer); 4270 return FALSE; 4271 } 4272 4273 /* Examine input records for the number of bytes available */ 4274 for(i=0; i<numEvents; i++) { 4275 if (lpBuffer[i].EventType == KEY_EVENT) { 4276 4277 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *) 4278 &(lpBuffer[i].Event); 4279 if (keyRecord->bKeyDown == TRUE) { 4280 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar); 4281 curLength++; 4282 if (*keyPressed == '\r') { 4283 actualLength = curLength; 4284 } 4285 } 4286 } 4287 } 4288 4289 if(lpBuffer != NULL) { 4290 os::free(lpBuffer); 4291 } 4292 4293 *pbytes = (long) actualLength; 4294 return TRUE; 4295} 4296 4297// Map a block of memory. 4298char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4299 char *addr, size_t bytes, bool read_only, 4300 bool allow_exec) { 4301 HANDLE hFile; 4302 char* base; 4303 4304 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, 4305 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 4306 if (hFile == NULL) { 4307 if (PrintMiscellaneous && Verbose) { 4308 DWORD err = GetLastError(); 4309 tty->print_cr("CreateFile() failed: GetLastError->%ld."); 4310 } 4311 return NULL; 4312 } 4313 4314 if (allow_exec) { 4315 // CreateFileMapping/MapViewOfFileEx can't map executable memory 4316 // unless it comes from a PE image (which the shared archive is not.) 4317 // Even VirtualProtect refuses to give execute access to mapped memory 4318 // that was not previously executable. 4319 // 4320 // Instead, stick the executable region in anonymous memory. Yuck. 4321 // Penalty is that ~4 pages will not be shareable - in the future 4322 // we might consider DLLizing the shared archive with a proper PE 4323 // header so that mapping executable + sharing is possible. 4324 4325 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, 4326 PAGE_READWRITE); 4327 if (base == NULL) { 4328 if (PrintMiscellaneous && Verbose) { 4329 DWORD err = GetLastError(); 4330 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); 4331 } 4332 CloseHandle(hFile); 4333 return NULL; 4334 } 4335 4336 DWORD bytes_read; 4337 OVERLAPPED overlapped; 4338 overlapped.Offset = (DWORD)file_offset; 4339 overlapped.OffsetHigh = 0; 4340 overlapped.hEvent = NULL; 4341 // ReadFile guarantees that if the return value is true, the requested 4342 // number of bytes were read before returning. 4343 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; 4344 if (!res) { 4345 if (PrintMiscellaneous && Verbose) { 4346 DWORD err = GetLastError(); 4347 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); 4348 } 4349 release_memory(base, bytes); 4350 CloseHandle(hFile); 4351 return NULL; 4352 } 4353 } else { 4354 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, 4355 NULL /*file_name*/); 4356 if (hMap == NULL) { 4357 if (PrintMiscellaneous && Verbose) { 4358 DWORD err = GetLastError(); 4359 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld."); 4360 } 4361 CloseHandle(hFile); 4362 return NULL; 4363 } 4364 4365 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; 4366 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, 4367 (DWORD)bytes, addr); 4368 if (base == NULL) { 4369 if (PrintMiscellaneous && Verbose) { 4370 DWORD err = GetLastError(); 4371 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); 4372 } 4373 CloseHandle(hMap); 4374 CloseHandle(hFile); 4375 return NULL; 4376 } 4377 4378 if (CloseHandle(hMap) == 0) { 4379 if (PrintMiscellaneous && Verbose) { 4380 DWORD err = GetLastError(); 4381 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); 4382 } 4383 CloseHandle(hFile); 4384 return base; 4385 } 4386 } 4387 4388 if (allow_exec) { 4389 DWORD old_protect; 4390 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; 4391 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; 4392 4393 if (!res) { 4394 if (PrintMiscellaneous && Verbose) { 4395 DWORD err = GetLastError(); 4396 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); 4397 } 4398 // Don't consider this a hard error, on IA32 even if the 4399 // VirtualProtect fails, we should still be able to execute 4400 CloseHandle(hFile); 4401 return base; 4402 } 4403 } 4404 4405 if (CloseHandle(hFile) == 0) { 4406 if (PrintMiscellaneous && Verbose) { 4407 DWORD err = GetLastError(); 4408 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); 4409 } 4410 return base; 4411 } 4412 4413 return base; 4414} 4415 4416 4417// Remap a block of memory. 4418char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 4419 char *addr, size_t bytes, bool read_only, 4420 bool allow_exec) { 4421 // This OS does not allow existing memory maps to be remapped so we 4422 // have to unmap the memory before we remap it. 4423 if (!os::unmap_memory(addr, bytes)) { 4424 return NULL; 4425 } 4426 4427 // There is a very small theoretical window between the unmap_memory() 4428 // call above and the map_memory() call below where a thread in native 4429 // code may be able to access an address that is no longer mapped. 4430 4431 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4432 allow_exec); 4433} 4434 4435 4436// Unmap a block of memory. 4437// Returns true=success, otherwise false. 4438 4439bool os::unmap_memory(char* addr, size_t bytes) { 4440 BOOL result = UnmapViewOfFile(addr); 4441 if (result == 0) { 4442 if (PrintMiscellaneous && Verbose) { 4443 DWORD err = GetLastError(); 4444 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); 4445 } 4446 return false; 4447 } 4448 return true; 4449} 4450 4451void os::pause() { 4452 char filename[MAX_PATH]; 4453 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4454 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4455 } else { 4456 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4457 } 4458 4459 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4460 if (fd != -1) { 4461 struct stat buf; 4462 ::close(fd); 4463 while (::stat(filename, &buf) == 0) { 4464 Sleep(100); 4465 } 4466 } else { 4467 jio_fprintf(stderr, 4468 "Could not open pause file '%s', continuing immediately.\n", filename); 4469 } 4470} 4471 4472// An Event wraps a win32 "CreateEvent" kernel handle. 4473// 4474// We have a number of choices regarding "CreateEvent" win32 handle leakage: 4475// 4476// 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle 4477// field, and call CloseHandle() on the win32 event handle. Unpark() would 4478// need to be modified to tolerate finding a NULL (invalid) win32 event handle. 4479// In addition, an unpark() operation might fetch the handle field, but the 4480// event could recycle between the fetch and the SetEvent() operation. 4481// SetEvent() would either fail because the handle was invalid, or inadvertently work, 4482// as the win32 handle value had been recycled. In an ideal world calling SetEvent() 4483// on an stale but recycled handle would be harmless, but in practice this might 4484// confuse other non-Sun code, so it's not a viable approach. 4485// 4486// 2: Once a win32 event handle is associated with an Event, it remains associated 4487// with the Event. The event handle is never closed. This could be construed 4488// as handle leakage, but only up to the maximum # of threads that have been extant 4489// at any one time. This shouldn't be an issue, as windows platforms typically 4490// permit a process to have hundreds of thousands of open handles. 4491// 4492// 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList 4493// and release unused handles. 4494// 4495// 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. 4496// It's not clear, however, that we wouldn't be trading one type of leak for another. 4497// 4498// 5. Use an RCU-like mechanism (Read-Copy Update). 4499// Or perhaps something similar to Maged Michael's "Hazard pointers". 4500// 4501// We use (2). 4502// 4503// TODO-FIXME: 4504// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. 4505// 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks 4506// to recover from (or at least detect) the dreaded Windows 841176 bug. 4507// 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent 4508// into a single win32 CreateEvent() handle. 4509// 4510// _Event transitions in park() 4511// -1 => -1 : illegal 4512// 1 => 0 : pass - return immediately 4513// 0 => -1 : block 4514// 4515// _Event serves as a restricted-range semaphore : 4516// -1 : thread is blocked 4517// 0 : neutral - thread is running or ready 4518// 1 : signaled - thread is running or ready 4519// 4520// Another possible encoding of _Event would be 4521// with explicit "PARKED" and "SIGNALED" bits. 4522 4523int os::PlatformEvent::park (jlong Millis) { 4524 guarantee (_ParkHandle != NULL , "Invariant") ; 4525 guarantee (Millis > 0 , "Invariant") ; 4526 int v ; 4527 4528 // CONSIDER: defer assigning a CreateEvent() handle to the Event until 4529 // the initial park() operation. 4530 4531 for (;;) { 4532 v = _Event ; 4533 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4534 } 4535 guarantee ((v == 0) || (v == 1), "invariant") ; 4536 if (v != 0) return OS_OK ; 4537 4538 // Do this the hard way by blocking ... 4539 // TODO: consider a brief spin here, gated on the success of recent 4540 // spin attempts by this thread. 4541 // 4542 // We decompose long timeouts into series of shorter timed waits. 4543 // Evidently large timo values passed in WaitForSingleObject() are problematic on some 4544 // versions of Windows. See EventWait() for details. This may be superstition. Or not. 4545 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time 4546 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from 4547 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend 4548 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == 4549 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate 4550 // for the already waited time. This policy does not admit any new outcomes. 4551 // In the future, however, we might want to track the accumulated wait time and 4552 // adjust Millis accordingly if we encounter a spurious wakeup. 4553 4554 const int MAXTIMEOUT = 0x10000000 ; 4555 DWORD rv = WAIT_TIMEOUT ; 4556 while (_Event < 0 && Millis > 0) { 4557 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) 4558 if (Millis > MAXTIMEOUT) { 4559 prd = MAXTIMEOUT ; 4560 } 4561 rv = ::WaitForSingleObject (_ParkHandle, prd) ; 4562 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; 4563 if (rv == WAIT_TIMEOUT) { 4564 Millis -= prd ; 4565 } 4566 } 4567 v = _Event ; 4568 _Event = 0 ; 4569 OrderAccess::fence() ; 4570 // If we encounter a nearly simultanous timeout expiry and unpark() 4571 // we return OS_OK indicating we awoke via unpark(). 4572 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. 4573 return (v >= 0) ? OS_OK : OS_TIMEOUT ; 4574} 4575 4576void os::PlatformEvent::park () { 4577 guarantee (_ParkHandle != NULL, "Invariant") ; 4578 // Invariant: Only the thread associated with the Event/PlatformEvent 4579 // may call park(). 4580 int v ; 4581 for (;;) { 4582 v = _Event ; 4583 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4584 } 4585 guarantee ((v == 0) || (v == 1), "invariant") ; 4586 if (v != 0) return ; 4587 4588 // Do this the hard way by blocking ... 4589 // TODO: consider a brief spin here, gated on the success of recent 4590 // spin attempts by this thread. 4591 while (_Event < 0) { 4592 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; 4593 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; 4594 } 4595 4596 // Usually we'll find _Event == 0 at this point, but as 4597 // an optional optimization we clear it, just in case can 4598 // multiple unpark() operations drove _Event up to 1. 4599 _Event = 0 ; 4600 OrderAccess::fence() ; 4601 guarantee (_Event >= 0, "invariant") ; 4602} 4603 4604void os::PlatformEvent::unpark() { 4605 guarantee (_ParkHandle != NULL, "Invariant") ; 4606 int v ; 4607 for (;;) { 4608 v = _Event ; // Increment _Event if it's < 1. 4609 if (v > 0) { 4610 // If it's already signaled just return. 4611 // The LD of _Event could have reordered or be satisfied 4612 // by a read-aside from this processor's write buffer. 4613 // To avoid problems execute a barrier and then 4614 // ratify the value. A degenerate CAS() would also work. 4615 // Viz., CAS (v+0, &_Event, v) == v). 4616 OrderAccess::fence() ; 4617 if (_Event == v) return ; 4618 continue ; 4619 } 4620 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 4621 } 4622 if (v < 0) { 4623 ::SetEvent (_ParkHandle) ; 4624 } 4625} 4626 4627 4628// JSR166 4629// ------------------------------------------------------- 4630 4631/* 4632 * The Windows implementation of Park is very straightforward: Basic 4633 * operations on Win32 Events turn out to have the right semantics to 4634 * use them directly. We opportunistically resuse the event inherited 4635 * from Monitor. 4636 */ 4637 4638 4639void Parker::park(bool isAbsolute, jlong time) { 4640 guarantee (_ParkEvent != NULL, "invariant") ; 4641 // First, demultiplex/decode time arguments 4642 if (time < 0) { // don't wait 4643 return; 4644 } 4645 else if (time == 0 && !isAbsolute) { 4646 time = INFINITE; 4647 } 4648 else if (isAbsolute) { 4649 time -= os::javaTimeMillis(); // convert to relative time 4650 if (time <= 0) // already elapsed 4651 return; 4652 } 4653 else { // relative 4654 time /= 1000000; // Must coarsen from nanos to millis 4655 if (time == 0) // Wait for the minimal time unit if zero 4656 time = 1; 4657 } 4658 4659 JavaThread* thread = (JavaThread*)(Thread::current()); 4660 assert(thread->is_Java_thread(), "Must be JavaThread"); 4661 JavaThread *jt = (JavaThread *)thread; 4662 4663 // Don't wait if interrupted or already triggered 4664 if (Thread::is_interrupted(thread, false) || 4665 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { 4666 ResetEvent(_ParkEvent); 4667 return; 4668 } 4669 else { 4670 ThreadBlockInVM tbivm(jt); 4671 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 4672 jt->set_suspend_equivalent(); 4673 4674 WaitForSingleObject(_ParkEvent, time); 4675 ResetEvent(_ParkEvent); 4676 4677 // If externally suspended while waiting, re-suspend 4678 if (jt->handle_special_suspend_equivalent_condition()) { 4679 jt->java_suspend_self(); 4680 } 4681 } 4682} 4683 4684void Parker::unpark() { 4685 guarantee (_ParkEvent != NULL, "invariant") ; 4686 SetEvent(_ParkEvent); 4687} 4688 4689// Run the specified command in a separate process. Return its exit value, 4690// or -1 on failure (e.g. can't create a new process). 4691int os::fork_and_exec(char* cmd) { 4692 STARTUPINFO si; 4693 PROCESS_INFORMATION pi; 4694 4695 memset(&si, 0, sizeof(si)); 4696 si.cb = sizeof(si); 4697 memset(&pi, 0, sizeof(pi)); 4698 BOOL rslt = CreateProcess(NULL, // executable name - use command line 4699 cmd, // command line 4700 NULL, // process security attribute 4701 NULL, // thread security attribute 4702 TRUE, // inherits system handles 4703 0, // no creation flags 4704 NULL, // use parent's environment block 4705 NULL, // use parent's starting directory 4706 &si, // (in) startup information 4707 &pi); // (out) process information 4708 4709 if (rslt) { 4710 // Wait until child process exits. 4711 WaitForSingleObject(pi.hProcess, INFINITE); 4712 4713 DWORD exit_code; 4714 GetExitCodeProcess(pi.hProcess, &exit_code); 4715 4716 // Close process and thread handles. 4717 CloseHandle(pi.hProcess); 4718 CloseHandle(pi.hThread); 4719 4720 return (int)exit_code; 4721 } else { 4722 return -1; 4723 } 4724} 4725 4726//-------------------------------------------------------------------------------------------------- 4727// Non-product code 4728 4729static int mallocDebugIntervalCounter = 0; 4730static int mallocDebugCounter = 0; 4731bool os::check_heap(bool force) { 4732 if (++mallocDebugCounter < MallocVerifyStart && !force) return true; 4733 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { 4734 // Note: HeapValidate executes two hardware breakpoints when it finds something 4735 // wrong; at these points, eax contains the address of the offending block (I think). 4736 // To get to the exlicit error message(s) below, just continue twice. 4737 HANDLE heap = GetProcessHeap(); 4738 { HeapLock(heap); 4739 PROCESS_HEAP_ENTRY phe; 4740 phe.lpData = NULL; 4741 while (HeapWalk(heap, &phe) != 0) { 4742 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && 4743 !HeapValidate(heap, 0, phe.lpData)) { 4744 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); 4745 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); 4746 fatal("corrupted C heap"); 4747 } 4748 } 4749 DWORD err = GetLastError(); 4750 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { 4751 fatal(err_msg("heap walk aborted with error %d", err)); 4752 } 4753 HeapUnlock(heap); 4754 } 4755 mallocDebugIntervalCounter = 0; 4756 } 4757 return true; 4758} 4759 4760 4761bool os::find(address addr, outputStream* st) { 4762 // Nothing yet 4763 return false; 4764} 4765 4766LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { 4767 DWORD exception_code = e->ExceptionRecord->ExceptionCode; 4768 4769 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 4770 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); 4771 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; 4772 address addr = (address) exceptionRecord->ExceptionInformation[1]; 4773 4774 if (os::is_memory_serialize_page(thread, addr)) 4775 return EXCEPTION_CONTINUE_EXECUTION; 4776 } 4777 4778 return EXCEPTION_CONTINUE_SEARCH; 4779} 4780 4781// We don't build a headless jre for Windows 4782bool os::is_headless_jre() { return false; } 4783 4784 4785typedef CRITICAL_SECTION mutex_t; 4786#define mutexInit(m) InitializeCriticalSection(m) 4787#define mutexDestroy(m) DeleteCriticalSection(m) 4788#define mutexLock(m) EnterCriticalSection(m) 4789#define mutexUnlock(m) LeaveCriticalSection(m) 4790 4791static bool sock_initialized = FALSE; 4792static mutex_t sockFnTableMutex; 4793 4794static void initSock() { 4795 WSADATA wsadata; 4796 4797 if (!os::WinSock2Dll::WinSock2Available()) { 4798 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n", 4799 ::GetLastError()); 4800 return; 4801 } 4802 if (sock_initialized == TRUE) return; 4803 4804 ::mutexInit(&sockFnTableMutex); 4805 ::mutexLock(&sockFnTableMutex); 4806 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) { 4807 jio_fprintf(stderr, "Could not initialize Winsock\n"); 4808 } 4809 sock_initialized = TRUE; 4810 ::mutexUnlock(&sockFnTableMutex); 4811} 4812 4813struct hostent* os::get_host_by_name(char* name) { 4814 if (!sock_initialized) { 4815 initSock(); 4816 } 4817 if (!os::WinSock2Dll::WinSock2Available()) { 4818 return NULL; 4819 } 4820 return (struct hostent*)os::WinSock2Dll::gethostbyname(name); 4821} 4822 4823int os::socket_close(int fd) { 4824 return ::closesocket(fd); 4825} 4826 4827int os::socket_available(int fd, jint *pbytes) { 4828 int ret = ::ioctlsocket(fd, FIONREAD, (u_long*)pbytes); 4829 return (ret < 0) ? 0 : 1; 4830} 4831 4832int os::socket(int domain, int type, int protocol) { 4833 return ::socket(domain, type, protocol); 4834} 4835 4836int os::listen(int fd, int count) { 4837 return ::listen(fd, count); 4838} 4839 4840int os::connect(int fd, struct sockaddr* him, socklen_t len) { 4841 return ::connect(fd, him, len); 4842} 4843 4844int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 4845 return ::accept(fd, him, len); 4846} 4847 4848int os::sendto(int fd, char* buf, size_t len, uint flags, 4849 struct sockaddr* to, socklen_t tolen) { 4850 4851 return ::sendto(fd, buf, (int)len, flags, to, tolen); 4852} 4853 4854int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags, 4855 sockaddr* from, socklen_t* fromlen) { 4856 4857 return ::recvfrom(fd, buf, (int)nBytes, flags, from, fromlen); 4858} 4859 4860int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 4861 return ::recv(fd, buf, (int)nBytes, flags); 4862} 4863 4864int os::send(int fd, char* buf, size_t nBytes, uint flags) { 4865 return ::send(fd, buf, (int)nBytes, flags); 4866} 4867 4868int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 4869 return ::send(fd, buf, (int)nBytes, flags); 4870} 4871 4872int os::timeout(int fd, long timeout) { 4873 fd_set tbl; 4874 struct timeval t; 4875 4876 t.tv_sec = timeout / 1000; 4877 t.tv_usec = (timeout % 1000) * 1000; 4878 4879 tbl.fd_count = 1; 4880 tbl.fd_array[0] = fd; 4881 4882 return ::select(1, &tbl, 0, 0, &t); 4883} 4884 4885int os::get_host_name(char* name, int namelen) { 4886 return ::gethostname(name, namelen); 4887} 4888 4889int os::socket_shutdown(int fd, int howto) { 4890 return ::shutdown(fd, howto); 4891} 4892 4893int os::bind(int fd, struct sockaddr* him, socklen_t len) { 4894 return ::bind(fd, him, len); 4895} 4896 4897int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 4898 return ::getsockname(fd, him, len); 4899} 4900 4901int os::get_sock_opt(int fd, int level, int optname, 4902 char* optval, socklen_t* optlen) { 4903 return ::getsockopt(fd, level, optname, optval, optlen); 4904} 4905 4906int os::set_sock_opt(int fd, int level, int optname, 4907 const char* optval, socklen_t optlen) { 4908 return ::setsockopt(fd, level, optname, optval, optlen); 4909} 4910 4911 4912// Kernel32 API 4913typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void); 4914typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 4915typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG); 4916typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG); 4917 4918GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL; 4919VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL; 4920GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL; 4921GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL; 4922BOOL os::Kernel32Dll::initialized = FALSE; 4923SIZE_T os::Kernel32Dll::GetLargePageMinimum() { 4924 assert(initialized && _GetLargePageMinimum != NULL, 4925 "GetLargePageMinimumAvailable() not yet called"); 4926 return _GetLargePageMinimum(); 4927} 4928 4929BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() { 4930 if (!initialized) { 4931 initialize(); 4932 } 4933 return _GetLargePageMinimum != NULL; 4934} 4935 4936BOOL os::Kernel32Dll::NumaCallsAvailable() { 4937 if (!initialized) { 4938 initialize(); 4939 } 4940 return _VirtualAllocExNuma != NULL; 4941} 4942 4943LPVOID 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 4950BOOL 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 4957BOOL 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 4965void os::Kernel32Dll::initializeCommon() { 4966 if (!initialized) { 4967 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 4968 assert(handle != NULL, "Just check"); 4969 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum"); 4970 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma"); 4971 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber"); 4972 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask"); 4973 initialized = TRUE; 4974 } 4975} 4976 4977 4978 4979#ifndef JDK6_OR_EARLIER 4980 4981void os::Kernel32Dll::initialize() { 4982 initializeCommon(); 4983} 4984 4985 4986// Kernel32 API 4987inline BOOL os::Kernel32Dll::SwitchToThread() { 4988 return ::SwitchToThread(); 4989} 4990 4991inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 4992 return true; 4993} 4994 4995 // Help tools 4996inline BOOL os::Kernel32Dll::HelpToolsAvailable() { 4997 return true; 4998} 4999 5000inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5001 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5002} 5003 5004inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5005 return ::Module32First(hSnapshot, lpme); 5006} 5007 5008inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5009 return ::Module32Next(hSnapshot, lpme); 5010} 5011 5012 5013inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5014 return true; 5015} 5016 5017inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5018 ::GetNativeSystemInfo(lpSystemInfo); 5019} 5020 5021// PSAPI API 5022inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5023 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5024} 5025 5026inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5027 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5028} 5029 5030inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5031 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5032} 5033 5034inline BOOL os::PSApiDll::PSApiAvailable() { 5035 return true; 5036} 5037 5038 5039// WinSock2 API 5040inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5041 return ::WSAStartup(wVersionRequested, lpWSAData); 5042} 5043 5044inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5045 return ::gethostbyname(name); 5046} 5047 5048inline BOOL os::WinSock2Dll::WinSock2Available() { 5049 return true; 5050} 5051 5052// Advapi API 5053inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5054 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5055 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5056 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5057 BufferLength, PreviousState, ReturnLength); 5058} 5059 5060inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5061 PHANDLE TokenHandle) { 5062 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5063} 5064 5065inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5066 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5067} 5068 5069inline BOOL os::Advapi32Dll::AdvapiAvailable() { 5070 return true; 5071} 5072 5073#else 5074// Kernel32 API 5075typedef BOOL (WINAPI* SwitchToThread_Fn)(void); 5076typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD); 5077typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32); 5078typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32); 5079typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO); 5080 5081SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL; 5082CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL; 5083Module32First_Fn os::Kernel32Dll::_Module32First = NULL; 5084Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL; 5085GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL; 5086 5087 5088void os::Kernel32Dll::initialize() { 5089 if (!initialized) { 5090 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 5091 assert(handle != NULL, "Just check"); 5092 5093 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread"); 5094 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn) 5095 ::GetProcAddress(handle, "CreateToolhelp32Snapshot"); 5096 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First"); 5097 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next"); 5098 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo"); 5099 initializeCommon(); // resolve the functions that always need resolving 5100 5101 initialized = TRUE; 5102 } 5103} 5104 5105BOOL os::Kernel32Dll::SwitchToThread() { 5106 assert(initialized && _SwitchToThread != NULL, 5107 "SwitchToThreadAvailable() not yet called"); 5108 return _SwitchToThread(); 5109} 5110 5111 5112BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5113 if (!initialized) { 5114 initialize(); 5115 } 5116 return _SwitchToThread != NULL; 5117} 5118 5119// Help tools 5120BOOL os::Kernel32Dll::HelpToolsAvailable() { 5121 if (!initialized) { 5122 initialize(); 5123 } 5124 return _CreateToolhelp32Snapshot != NULL && 5125 _Module32First != NULL && 5126 _Module32Next != NULL; 5127} 5128 5129HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5130 assert(initialized && _CreateToolhelp32Snapshot != NULL, 5131 "HelpToolsAvailable() not yet called"); 5132 5133 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5134} 5135 5136BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5137 assert(initialized && _Module32First != NULL, 5138 "HelpToolsAvailable() not yet called"); 5139 5140 return _Module32First(hSnapshot, lpme); 5141} 5142 5143inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5144 assert(initialized && _Module32Next != NULL, 5145 "HelpToolsAvailable() not yet called"); 5146 5147 return _Module32Next(hSnapshot, lpme); 5148} 5149 5150 5151BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5152 if (!initialized) { 5153 initialize(); 5154 } 5155 return _GetNativeSystemInfo != NULL; 5156} 5157 5158void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5159 assert(initialized && _GetNativeSystemInfo != NULL, 5160 "GetNativeSystemInfoAvailable() not yet called"); 5161 5162 _GetNativeSystemInfo(lpSystemInfo); 5163} 5164 5165 5166 5167// PSAPI API 5168 5169 5170typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD); 5171typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);; 5172typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD); 5173 5174EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL; 5175GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL; 5176GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL; 5177BOOL os::PSApiDll::initialized = FALSE; 5178 5179void os::PSApiDll::initialize() { 5180 if (!initialized) { 5181 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0); 5182 if (handle != NULL) { 5183 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle, 5184 "EnumProcessModules"); 5185 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle, 5186 "GetModuleFileNameExA"); 5187 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle, 5188 "GetModuleInformation"); 5189 } 5190 initialized = TRUE; 5191 } 5192} 5193 5194 5195 5196BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5197 assert(initialized && _EnumProcessModules != NULL, 5198 "PSApiAvailable() not yet called"); 5199 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5200} 5201 5202DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5203 assert(initialized && _GetModuleFileNameEx != NULL, 5204 "PSApiAvailable() not yet called"); 5205 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5206} 5207 5208BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5209 assert(initialized && _GetModuleInformation != NULL, 5210 "PSApiAvailable() not yet called"); 5211 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5212} 5213 5214BOOL os::PSApiDll::PSApiAvailable() { 5215 if (!initialized) { 5216 initialize(); 5217 } 5218 return _EnumProcessModules != NULL && 5219 _GetModuleFileNameEx != NULL && 5220 _GetModuleInformation != NULL; 5221} 5222 5223 5224// WinSock2 API 5225typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA); 5226typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...); 5227 5228WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL; 5229gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL; 5230BOOL os::WinSock2Dll::initialized = FALSE; 5231 5232void os::WinSock2Dll::initialize() { 5233 if (!initialized) { 5234 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0); 5235 if (handle != NULL) { 5236 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup"); 5237 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname"); 5238 } 5239 initialized = TRUE; 5240 } 5241} 5242 5243 5244BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5245 assert(initialized && _WSAStartup != NULL, 5246 "WinSock2Available() not yet called"); 5247 return _WSAStartup(wVersionRequested, lpWSAData); 5248} 5249 5250struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5251 assert(initialized && _gethostbyname != NULL, 5252 "WinSock2Available() not yet called"); 5253 return _gethostbyname(name); 5254} 5255 5256BOOL os::WinSock2Dll::WinSock2Available() { 5257 if (!initialized) { 5258 initialize(); 5259 } 5260 return _WSAStartup != NULL && 5261 _gethostbyname != NULL; 5262} 5263 5264typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 5265typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE); 5266typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID); 5267 5268AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL; 5269OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL; 5270LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL; 5271BOOL os::Advapi32Dll::initialized = FALSE; 5272 5273void os::Advapi32Dll::initialize() { 5274 if (!initialized) { 5275 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0); 5276 if (handle != NULL) { 5277 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle, 5278 "AdjustTokenPrivileges"); 5279 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle, 5280 "OpenProcessToken"); 5281 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle, 5282 "LookupPrivilegeValueA"); 5283 } 5284 initialized = TRUE; 5285 } 5286} 5287 5288BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5289 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5290 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5291 assert(initialized && _AdjustTokenPrivileges != NULL, 5292 "AdvapiAvailable() not yet called"); 5293 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5294 BufferLength, PreviousState, ReturnLength); 5295} 5296 5297BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5298 PHANDLE TokenHandle) { 5299 assert(initialized && _OpenProcessToken != NULL, 5300 "AdvapiAvailable() not yet called"); 5301 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5302} 5303 5304BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5305 assert(initialized && _LookupPrivilegeValue != NULL, 5306 "AdvapiAvailable() not yet called"); 5307 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5308} 5309 5310BOOL os::Advapi32Dll::AdvapiAvailable() { 5311 if (!initialized) { 5312 initialize(); 5313 } 5314 return _AdjustTokenPrivileges != NULL && 5315 _OpenProcessToken != NULL && 5316 _LookupPrivilegeValue != NULL; 5317} 5318 5319#endif 5320