os_windows.cpp revision 4039:2ef7061f13b4
1/* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// Must be at least Windows 2000 or XP to use IsDebuggerPresent 26#define _WIN32_WINNT 0x500 27 28// no precompiled headers 29#include "classfile/classLoader.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "code/icBuffer.hpp" 33#include "code/vtableStubs.hpp" 34#include "compiler/compileBroker.hpp" 35#include "compiler/disassembler.hpp" 36#include "interpreter/interpreter.hpp" 37#include "jvm_windows.h" 38#include "memory/allocation.inline.hpp" 39#include "memory/filemap.hpp" 40#include "mutex_windows.inline.hpp" 41#include "oops/oop.inline.hpp" 42#include "os_share_windows.hpp" 43#include "prims/jniFastGetField.hpp" 44#include "prims/jvm.h" 45#include "prims/jvm_misc.hpp" 46#include "runtime/arguments.hpp" 47#include "runtime/extendedPC.hpp" 48#include "runtime/globals.hpp" 49#include "runtime/interfaceSupport.hpp" 50#include "runtime/java.hpp" 51#include "runtime/javaCalls.hpp" 52#include "runtime/mutexLocker.hpp" 53#include "runtime/objectMonitor.hpp" 54#include "runtime/osThread.hpp" 55#include "runtime/perfMemory.hpp" 56#include "runtime/sharedRuntime.hpp" 57#include "runtime/statSampler.hpp" 58#include "runtime/stubRoutines.hpp" 59#include "runtime/thread.inline.hpp" 60#include "runtime/threadCritical.hpp" 61#include "runtime/timer.hpp" 62#include "services/attachListener.hpp" 63#include "services/runtimeService.hpp" 64#include "utilities/decoder.hpp" 65#include "utilities/defaultStream.hpp" 66#include "utilities/events.hpp" 67#include "utilities/growableArray.hpp" 68#include "utilities/vmError.hpp" 69 70#ifdef _DEBUG 71#include <crtdbg.h> 72#endif 73 74 75#include <windows.h> 76#include <sys/types.h> 77#include <sys/stat.h> 78#include <sys/timeb.h> 79#include <objidl.h> 80#include <shlobj.h> 81 82#include <malloc.h> 83#include <signal.h> 84#include <direct.h> 85#include <errno.h> 86#include <fcntl.h> 87#include <io.h> 88#include <process.h> // For _beginthreadex(), _endthreadex() 89#include <imagehlp.h> // For os::dll_address_to_function_name 90/* for enumerating dll libraries */ 91#include <vdmdbg.h> 92 93// for timer info max values which include all bits 94#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 95 96// For DLL loading/load error detection 97// Values of PE COFF 98#define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c 99#define IMAGE_FILE_SIGNATURE_LENGTH 4 100 101static HANDLE main_process; 102static HANDLE main_thread; 103static int main_thread_id; 104 105static FILETIME process_creation_time; 106static FILETIME process_exit_time; 107static FILETIME process_user_time; 108static FILETIME process_kernel_time; 109 110#ifdef _M_IA64 111#define __CPU__ ia64 112#elif _M_AMD64 113#define __CPU__ amd64 114#else 115#define __CPU__ i486 116#endif 117 118// save DLL module handle, used by GetModuleFileName 119 120HINSTANCE vm_lib_handle; 121 122BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { 123 switch (reason) { 124 case DLL_PROCESS_ATTACH: 125 vm_lib_handle = hinst; 126 if(ForceTimeHighResolution) 127 timeBeginPeriod(1L); 128 break; 129 case DLL_PROCESS_DETACH: 130 if(ForceTimeHighResolution) 131 timeEndPeriod(1L); 132 break; 133 default: 134 break; 135 } 136 return true; 137} 138 139static inline double fileTimeAsDouble(FILETIME* time) { 140 const double high = (double) ((unsigned int) ~0); 141 const double split = 10000000.0; 142 double result = (time->dwLowDateTime / split) + 143 time->dwHighDateTime * (high/split); 144 return result; 145} 146 147// Implementation of os 148 149bool os::getenv(const char* name, char* buffer, int len) { 150 int result = GetEnvironmentVariable(name, buffer, len); 151 return result > 0 && result < len; 152} 153 154 155// No setuid programs under Windows. 156bool os::have_special_privileges() { 157 return false; 158} 159 160 161// This method is a periodic task to check for misbehaving JNI applications 162// under CheckJNI, we can add any periodic checks here. 163// For Windows at the moment does nothing 164void os::run_periodic_checks() { 165 return; 166} 167 168#ifndef _WIN64 169// previous UnhandledExceptionFilter, if there is one 170static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL; 171 172LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); 173#endif 174void os::init_system_properties_values() { 175 /* sysclasspath, java_home, dll_dir */ 176 { 177 char *home_path; 178 char *dll_path; 179 char *pslash; 180 char *bin = "\\bin"; 181 char home_dir[MAX_PATH]; 182 183 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { 184 os::jvm_path(home_dir, sizeof(home_dir)); 185 // Found the full path to jvm.dll. 186 // Now cut the path to <java_home>/jre if we can. 187 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ 188 pslash = strrchr(home_dir, '\\'); 189 if (pslash != NULL) { 190 *pslash = '\0'; /* get rid of \{client|server} */ 191 pslash = strrchr(home_dir, '\\'); 192 if (pslash != NULL) 193 *pslash = '\0'; /* get rid of \bin */ 194 } 195 } 196 197 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1, mtInternal); 198 if (home_path == NULL) 199 return; 200 strcpy(home_path, home_dir); 201 Arguments::set_java_home(home_path); 202 203 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1, mtInternal); 204 if (dll_path == NULL) 205 return; 206 strcpy(dll_path, home_dir); 207 strcat(dll_path, bin); 208 Arguments::set_dll_dir(dll_path); 209 210 if (!set_boot_path('\\', ';')) 211 return; 212 } 213 214 /* library_path */ 215 #define EXT_DIR "\\lib\\ext" 216 #define BIN_DIR "\\bin" 217 #define PACKAGE_DIR "\\Sun\\Java" 218 { 219 /* Win32 library search order (See the documentation for LoadLibrary): 220 * 221 * 1. The directory from which application is loaded. 222 * 2. The system wide Java Extensions directory (Java only) 223 * 3. System directory (GetSystemDirectory) 224 * 4. Windows directory (GetWindowsDirectory) 225 * 5. The PATH environment variable 226 * 6. The current directory 227 */ 228 229 char *library_path; 230 char tmp[MAX_PATH]; 231 char *path_str = ::getenv("PATH"); 232 233 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + 234 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10, mtInternal); 235 236 library_path[0] = '\0'; 237 238 GetModuleFileName(NULL, tmp, sizeof(tmp)); 239 *(strrchr(tmp, '\\')) = '\0'; 240 strcat(library_path, tmp); 241 242 GetWindowsDirectory(tmp, sizeof(tmp)); 243 strcat(library_path, ";"); 244 strcat(library_path, tmp); 245 strcat(library_path, PACKAGE_DIR BIN_DIR); 246 247 GetSystemDirectory(tmp, sizeof(tmp)); 248 strcat(library_path, ";"); 249 strcat(library_path, tmp); 250 251 GetWindowsDirectory(tmp, sizeof(tmp)); 252 strcat(library_path, ";"); 253 strcat(library_path, tmp); 254 255 if (path_str) { 256 strcat(library_path, ";"); 257 strcat(library_path, path_str); 258 } 259 260 strcat(library_path, ";."); 261 262 Arguments::set_library_path(library_path); 263 FREE_C_HEAP_ARRAY(char, library_path, mtInternal); 264 } 265 266 /* Default extensions directory */ 267 { 268 char path[MAX_PATH]; 269 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; 270 GetWindowsDirectory(path, MAX_PATH); 271 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, 272 path, PACKAGE_DIR, EXT_DIR); 273 Arguments::set_ext_dirs(buf); 274 } 275 #undef EXT_DIR 276 #undef BIN_DIR 277 #undef PACKAGE_DIR 278 279 /* Default endorsed standards directory. */ 280 { 281 #define ENDORSED_DIR "\\lib\\endorsed" 282 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); 283 char * buf = NEW_C_HEAP_ARRAY(char, len, mtInternal); 284 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); 285 Arguments::set_endorsed_dirs(buf); 286 #undef ENDORSED_DIR 287 } 288 289#ifndef _WIN64 290 // set our UnhandledExceptionFilter and save any previous one 291 prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception); 292#endif 293 294 // Done 295 return; 296} 297 298void os::breakpoint() { 299 DebugBreak(); 300} 301 302// Invoked from the BREAKPOINT Macro 303extern "C" void breakpoint() { 304 os::breakpoint(); 305} 306 307/* 308 * RtlCaptureStackBackTrace Windows API may not exist prior to Windows XP. 309 * So far, this method is only used by Native Memory Tracking, which is 310 * only supported on Windows XP or later. 311 */ 312address os::get_caller_pc(int n) { 313#ifdef _NMT_NOINLINE_ 314 n ++; 315#endif 316 address pc; 317 if (os::Kernel32Dll::RtlCaptureStackBackTrace(n + 1, 1, (PVOID*)&pc, NULL) == 1) { 318 return pc; 319 } 320 return NULL; 321} 322 323 324// os::current_stack_base() 325// 326// Returns the base of the stack, which is the stack's 327// starting address. This function must be called 328// while running on the stack of the thread being queried. 329 330address os::current_stack_base() { 331 MEMORY_BASIC_INFORMATION minfo; 332 address stack_bottom; 333 size_t stack_size; 334 335 VirtualQuery(&minfo, &minfo, sizeof(minfo)); 336 stack_bottom = (address)minfo.AllocationBase; 337 stack_size = minfo.RegionSize; 338 339 // Add up the sizes of all the regions with the same 340 // AllocationBase. 341 while( 1 ) 342 { 343 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); 344 if ( stack_bottom == (address)minfo.AllocationBase ) 345 stack_size += minfo.RegionSize; 346 else 347 break; 348 } 349 350#ifdef _M_IA64 351 // IA64 has memory and register stacks 352 stack_size = stack_size / 2; 353#endif 354 return stack_bottom + stack_size; 355} 356 357size_t os::current_stack_size() { 358 size_t sz; 359 MEMORY_BASIC_INFORMATION minfo; 360 VirtualQuery(&minfo, &minfo, sizeof(minfo)); 361 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; 362 return sz; 363} 364 365struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 366 const struct tm* time_struct_ptr = localtime(clock); 367 if (time_struct_ptr != NULL) { 368 *res = *time_struct_ptr; 369 return res; 370 } 371 return NULL; 372} 373 374LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); 375 376// Thread start routine for all new Java threads 377static unsigned __stdcall java_start(Thread* thread) { 378 // Try to randomize the cache line index of hot stack frames. 379 // This helps when threads of the same stack traces evict each other's 380 // cache lines. The threads can be either from the same JVM instance, or 381 // from different JVM instances. The benefit is especially true for 382 // processors with hyperthreading technology. 383 static int counter = 0; 384 int pid = os::current_process_id(); 385 _alloca(((pid ^ counter++) & 7) * 128); 386 387 OSThread* osthr = thread->osthread(); 388 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 389 390 if (UseNUMA) { 391 int lgrp_id = os::numa_get_group_id(); 392 if (lgrp_id != -1) { 393 thread->set_lgrp_id(lgrp_id); 394 } 395 } 396 397 398 // Install a win32 structured exception handler around every thread created 399 // by VM, so VM can genrate error dump when an exception occurred in non- 400 // Java thread (e.g. VM thread). 401 __try { 402 thread->run(); 403 } __except(topLevelExceptionFilter( 404 (_EXCEPTION_POINTERS*)_exception_info())) { 405 // Nothing to do. 406 } 407 408 // One less thread is executing 409 // When the VMThread gets here, the main thread may have already exited 410 // which frees the CodeHeap containing the Atomic::add code 411 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 412 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); 413 } 414 415 return 0; 416} 417 418static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { 419 // Allocate the OSThread object 420 OSThread* osthread = new OSThread(NULL, NULL); 421 if (osthread == NULL) return NULL; 422 423 // Initialize support for Java interrupts 424 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 425 if (interrupt_event == NULL) { 426 delete osthread; 427 return NULL; 428 } 429 osthread->set_interrupt_event(interrupt_event); 430 431 // Store info on the Win32 thread into the OSThread 432 osthread->set_thread_handle(thread_handle); 433 osthread->set_thread_id(thread_id); 434 435 if (UseNUMA) { 436 int lgrp_id = os::numa_get_group_id(); 437 if (lgrp_id != -1) { 438 thread->set_lgrp_id(lgrp_id); 439 } 440 } 441 442 // Initial thread state is INITIALIZED, not SUSPENDED 443 osthread->set_state(INITIALIZED); 444 445 return osthread; 446} 447 448 449bool os::create_attached_thread(JavaThread* thread) { 450#ifdef ASSERT 451 thread->verify_not_published(); 452#endif 453 HANDLE thread_h; 454 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), 455 &thread_h, THREAD_ALL_ACCESS, false, 0)) { 456 fatal("DuplicateHandle failed\n"); 457 } 458 OSThread* osthread = create_os_thread(thread, thread_h, 459 (int)current_thread_id()); 460 if (osthread == NULL) { 461 return false; 462 } 463 464 // Initial thread state is RUNNABLE 465 osthread->set_state(RUNNABLE); 466 467 thread->set_osthread(osthread); 468 return true; 469} 470 471bool os::create_main_thread(JavaThread* thread) { 472#ifdef ASSERT 473 thread->verify_not_published(); 474#endif 475 if (_starting_thread == NULL) { 476 _starting_thread = create_os_thread(thread, main_thread, main_thread_id); 477 if (_starting_thread == NULL) { 478 return false; 479 } 480 } 481 482 // The primordial thread is runnable from the start) 483 _starting_thread->set_state(RUNNABLE); 484 485 thread->set_osthread(_starting_thread); 486 return true; 487} 488 489// Allocate and initialize a new OSThread 490bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 491 unsigned thread_id; 492 493 // Allocate the OSThread object 494 OSThread* osthread = new OSThread(NULL, NULL); 495 if (osthread == NULL) { 496 return false; 497 } 498 499 // Initialize support for Java interrupts 500 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 501 if (interrupt_event == NULL) { 502 delete osthread; 503 return NULL; 504 } 505 osthread->set_interrupt_event(interrupt_event); 506 osthread->set_interrupted(false); 507 508 thread->set_osthread(osthread); 509 510 if (stack_size == 0) { 511 switch (thr_type) { 512 case os::java_thread: 513 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 514 if (JavaThread::stack_size_at_create() > 0) 515 stack_size = JavaThread::stack_size_at_create(); 516 break; 517 case os::compiler_thread: 518 if (CompilerThreadStackSize > 0) { 519 stack_size = (size_t)(CompilerThreadStackSize * K); 520 break; 521 } // else fall through: 522 // use VMThreadStackSize if CompilerThreadStackSize is not defined 523 case os::vm_thread: 524 case os::pgc_thread: 525 case os::cgc_thread: 526 case os::watcher_thread: 527 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 528 break; 529 } 530 } 531 532 // Create the Win32 thread 533 // 534 // Contrary to what MSDN document says, "stack_size" in _beginthreadex() 535 // does not specify stack size. Instead, it specifies the size of 536 // initially committed space. The stack size is determined by 537 // PE header in the executable. If the committed "stack_size" is larger 538 // than default value in the PE header, the stack is rounded up to the 539 // nearest multiple of 1MB. For example if the launcher has default 540 // stack size of 320k, specifying any size less than 320k does not 541 // affect the actual stack size at all, it only affects the initial 542 // commitment. On the other hand, specifying 'stack_size' larger than 543 // default value may cause significant increase in memory usage, because 544 // not only the stack space will be rounded up to MB, but also the 545 // entire space is committed upfront. 546 // 547 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' 548 // for CreateThread() that can treat 'stack_size' as stack size. However we 549 // are not supposed to call CreateThread() directly according to MSDN 550 // document because JVM uses C runtime library. The good news is that the 551 // flag appears to work with _beginthredex() as well. 552 553#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION 554#define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) 555#endif 556 557 HANDLE thread_handle = 558 (HANDLE)_beginthreadex(NULL, 559 (unsigned)stack_size, 560 (unsigned (__stdcall *)(void*)) java_start, 561 thread, 562 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, 563 &thread_id); 564 if (thread_handle == NULL) { 565 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again 566 // without the flag. 567 thread_handle = 568 (HANDLE)_beginthreadex(NULL, 569 (unsigned)stack_size, 570 (unsigned (__stdcall *)(void*)) java_start, 571 thread, 572 CREATE_SUSPENDED, 573 &thread_id); 574 } 575 if (thread_handle == NULL) { 576 // Need to clean up stuff we've allocated so far 577 CloseHandle(osthread->interrupt_event()); 578 thread->set_osthread(NULL); 579 delete osthread; 580 return NULL; 581 } 582 583 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); 584 585 // Store info on the Win32 thread into the OSThread 586 osthread->set_thread_handle(thread_handle); 587 osthread->set_thread_id(thread_id); 588 589 // Initial thread state is INITIALIZED, not SUSPENDED 590 osthread->set_state(INITIALIZED); 591 592 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 593 return true; 594} 595 596 597// Free Win32 resources related to the OSThread 598void os::free_thread(OSThread* osthread) { 599 assert(osthread != NULL, "osthread not set"); 600 CloseHandle(osthread->thread_handle()); 601 CloseHandle(osthread->interrupt_event()); 602 delete osthread; 603} 604 605 606static int has_performance_count = 0; 607static jlong first_filetime; 608static jlong initial_performance_count; 609static jlong performance_frequency; 610 611 612jlong as_long(LARGE_INTEGER x) { 613 jlong result = 0; // initialization to avoid warning 614 set_high(&result, x.HighPart); 615 set_low(&result, x.LowPart); 616 return result; 617} 618 619 620jlong os::elapsed_counter() { 621 LARGE_INTEGER count; 622 if (has_performance_count) { 623 QueryPerformanceCounter(&count); 624 return as_long(count) - initial_performance_count; 625 } else { 626 FILETIME wt; 627 GetSystemTimeAsFileTime(&wt); 628 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); 629 } 630} 631 632 633jlong os::elapsed_frequency() { 634 if (has_performance_count) { 635 return performance_frequency; 636 } else { 637 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. 638 return 10000000; 639 } 640} 641 642 643julong os::available_memory() { 644 return win32::available_memory(); 645} 646 647julong os::win32::available_memory() { 648 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 649 // value if total memory is larger than 4GB 650 MEMORYSTATUSEX ms; 651 ms.dwLength = sizeof(ms); 652 GlobalMemoryStatusEx(&ms); 653 654 return (julong)ms.ullAvailPhys; 655} 656 657julong os::physical_memory() { 658 return win32::physical_memory(); 659} 660 661julong os::allocatable_physical_memory(julong size) { 662#ifdef _LP64 663 return size; 664#else 665 // Limit to 1400m because of the 2gb address space wall 666 return MIN2(size, (julong)1400*M); 667#endif 668} 669 670// VC6 lacks DWORD_PTR 671#if _MSC_VER < 1300 672typedef UINT_PTR DWORD_PTR; 673#endif 674 675int os::active_processor_count() { 676 DWORD_PTR lpProcessAffinityMask = 0; 677 DWORD_PTR lpSystemAffinityMask = 0; 678 int proc_count = processor_count(); 679 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && 680 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { 681 // Nof active processors is number of bits in process affinity mask 682 int bitcount = 0; 683 while (lpProcessAffinityMask != 0) { 684 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); 685 bitcount++; 686 } 687 return bitcount; 688 } else { 689 return proc_count; 690 } 691} 692 693void os::set_native_thread_name(const char *name) { 694 // Not yet implemented. 695 return; 696} 697 698bool os::distribute_processes(uint length, uint* distribution) { 699 // Not yet implemented. 700 return false; 701} 702 703bool os::bind_to_processor(uint processor_id) { 704 // Not yet implemented. 705 return false; 706} 707 708static void initialize_performance_counter() { 709 LARGE_INTEGER count; 710 if (QueryPerformanceFrequency(&count)) { 711 has_performance_count = 1; 712 performance_frequency = as_long(count); 713 QueryPerformanceCounter(&count); 714 initial_performance_count = as_long(count); 715 } else { 716 has_performance_count = 0; 717 FILETIME wt; 718 GetSystemTimeAsFileTime(&wt); 719 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 720 } 721} 722 723 724double os::elapsedTime() { 725 return (double) elapsed_counter() / (double) elapsed_frequency(); 726} 727 728 729// Windows format: 730// The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. 731// Java format: 732// Java standards require the number of milliseconds since 1/1/1970 733 734// Constant offset - calculated using offset() 735static jlong _offset = 116444736000000000; 736// Fake time counter for reproducible results when debugging 737static jlong fake_time = 0; 738 739#ifdef ASSERT 740// Just to be safe, recalculate the offset in debug mode 741static jlong _calculated_offset = 0; 742static int _has_calculated_offset = 0; 743 744jlong offset() { 745 if (_has_calculated_offset) return _calculated_offset; 746 SYSTEMTIME java_origin; 747 java_origin.wYear = 1970; 748 java_origin.wMonth = 1; 749 java_origin.wDayOfWeek = 0; // ignored 750 java_origin.wDay = 1; 751 java_origin.wHour = 0; 752 java_origin.wMinute = 0; 753 java_origin.wSecond = 0; 754 java_origin.wMilliseconds = 0; 755 FILETIME jot; 756 if (!SystemTimeToFileTime(&java_origin, &jot)) { 757 fatal(err_msg("Error = %d\nWindows error", GetLastError())); 758 } 759 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); 760 _has_calculated_offset = 1; 761 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); 762 return _calculated_offset; 763} 764#else 765jlong offset() { 766 return _offset; 767} 768#endif 769 770jlong windows_to_java_time(FILETIME wt) { 771 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 772 return (a - offset()) / 10000; 773} 774 775FILETIME java_to_windows_time(jlong l) { 776 jlong a = (l * 10000) + offset(); 777 FILETIME result; 778 result.dwHighDateTime = high(a); 779 result.dwLowDateTime = low(a); 780 return result; 781} 782 783// For now, we say that Windows does not support vtime. I have no idea 784// whether it can actually be made to (DLD, 9/13/05). 785 786bool os::supports_vtime() { return false; } 787bool os::enable_vtime() { return false; } 788bool os::vtime_enabled() { return false; } 789double os::elapsedVTime() { 790 // better than nothing, but not much 791 return elapsedTime(); 792} 793 794jlong os::javaTimeMillis() { 795 if (UseFakeTimers) { 796 return fake_time++; 797 } else { 798 FILETIME wt; 799 GetSystemTimeAsFileTime(&wt); 800 return windows_to_java_time(wt); 801 } 802} 803 804jlong os::javaTimeNanos() { 805 if (!has_performance_count) { 806 return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do. 807 } else { 808 LARGE_INTEGER current_count; 809 QueryPerformanceCounter(¤t_count); 810 double current = as_long(current_count); 811 double freq = performance_frequency; 812 jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC); 813 return time; 814 } 815} 816 817void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 818 if (!has_performance_count) { 819 // javaTimeMillis() doesn't have much percision, 820 // but it is not going to wrap -- so all 64 bits 821 info_ptr->max_value = ALL_64_BITS; 822 823 // this is a wall clock timer, so may skip 824 info_ptr->may_skip_backward = true; 825 info_ptr->may_skip_forward = true; 826 } else { 827 jlong freq = performance_frequency; 828 if (freq < NANOSECS_PER_SEC) { 829 // the performance counter is 64 bits and we will 830 // be multiplying it -- so no wrap in 64 bits 831 info_ptr->max_value = ALL_64_BITS; 832 } else if (freq > NANOSECS_PER_SEC) { 833 // use the max value the counter can reach to 834 // determine the max value which could be returned 835 julong max_counter = (julong)ALL_64_BITS; 836 info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC)); 837 } else { 838 // the performance counter is 64 bits and we will 839 // be using it directly -- so no wrap in 64 bits 840 info_ptr->max_value = ALL_64_BITS; 841 } 842 843 // using a counter, so no skipping 844 info_ptr->may_skip_backward = false; 845 info_ptr->may_skip_forward = false; 846 } 847 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 848} 849 850char* os::local_time_string(char *buf, size_t buflen) { 851 SYSTEMTIME st; 852 GetLocalTime(&st); 853 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 854 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); 855 return buf; 856} 857 858bool os::getTimesSecs(double* process_real_time, 859 double* process_user_time, 860 double* process_system_time) { 861 HANDLE h_process = GetCurrentProcess(); 862 FILETIME create_time, exit_time, kernel_time, user_time; 863 BOOL result = GetProcessTimes(h_process, 864 &create_time, 865 &exit_time, 866 &kernel_time, 867 &user_time); 868 if (result != 0) { 869 FILETIME wt; 870 GetSystemTimeAsFileTime(&wt); 871 jlong rtc_millis = windows_to_java_time(wt); 872 jlong user_millis = windows_to_java_time(user_time); 873 jlong system_millis = windows_to_java_time(kernel_time); 874 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); 875 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); 876 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); 877 return true; 878 } else { 879 return false; 880 } 881} 882 883void os::shutdown() { 884 885 // allow PerfMemory to attempt cleanup of any persistent resources 886 perfMemory_exit(); 887 888 // flush buffered output, finish log files 889 ostream_abort(); 890 891 // Check for abort hook 892 abort_hook_t abort_hook = Arguments::abort_hook(); 893 if (abort_hook != NULL) { 894 abort_hook(); 895 } 896} 897 898 899static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 900 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION); 901 902void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) { 903 HINSTANCE dbghelp; 904 EXCEPTION_POINTERS ep; 905 MINIDUMP_EXCEPTION_INFORMATION mei; 906 MINIDUMP_EXCEPTION_INFORMATION* pmei; 907 908 HANDLE hProcess = GetCurrentProcess(); 909 DWORD processId = GetCurrentProcessId(); 910 HANDLE dumpFile; 911 MINIDUMP_TYPE dumpType; 912 static const char* cwd; 913 914 // If running on a client version of Windows and user has not explicitly enabled dumping 915 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) { 916 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false); 917 return; 918 // If running on a server version of Windows and user has explictly disabled dumping 919 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) { 920 VMError::report_coredump_status("Minidump has been disabled from the command line", false); 921 return; 922 } 923 924 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0); 925 926 if (dbghelp == NULL) { 927 VMError::report_coredump_status("Failed to load dbghelp.dll", false); 928 return; 929 } 930 931 _MiniDumpWriteDump = CAST_TO_FN_PTR( 932 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 933 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION), 934 GetProcAddress(dbghelp, "MiniDumpWriteDump")); 935 936 if (_MiniDumpWriteDump == NULL) { 937 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false); 938 return; 939 } 940 941 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData); 942 943// Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with 944// API_VERSION_NUMBER 11 or higher contains the ones we want though 945#if API_VERSION_NUMBER >= 11 946 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo | 947 MiniDumpWithUnloadedModules); 948#endif 949 950 cwd = get_current_directory(NULL, 0); 951 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id()); 952 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 953 954 if (dumpFile == INVALID_HANDLE_VALUE) { 955 VMError::report_coredump_status("Failed to create file for dumping", false); 956 return; 957 } 958 if (exceptionRecord != NULL && contextRecord != NULL) { 959 ep.ContextRecord = (PCONTEXT) contextRecord; 960 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord; 961 962 mei.ThreadId = GetCurrentThreadId(); 963 mei.ExceptionPointers = &ep; 964 pmei = &mei; 965 } else { 966 pmei = NULL; 967 } 968 969 970 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all 971 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then. 972 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false && 973 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) { 974 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false); 975 } else { 976 VMError::report_coredump_status(buffer, true); 977 } 978 979 CloseHandle(dumpFile); 980} 981 982 983 984void os::abort(bool dump_core) 985{ 986 os::shutdown(); 987 // no core dump on Windows 988 ::exit(1); 989} 990 991// Die immediately, no exit hook, no abort hook, no cleanup. 992void os::die() { 993 _exit(-1); 994} 995 996// Directory routines copied from src/win32/native/java/io/dirent_md.c 997// * dirent_md.c 1.15 00/02/02 998// 999// The declarations for DIR and struct dirent are in jvm_win32.h. 1000 1001/* Caller must have already run dirname through JVM_NativePath, which removes 1002 duplicate slashes and converts all instances of '/' into '\\'. */ 1003 1004DIR * 1005os::opendir(const char *dirname) 1006{ 1007 assert(dirname != NULL, "just checking"); // hotspot change 1008 DIR *dirp = (DIR *)malloc(sizeof(DIR), mtInternal); 1009 DWORD fattr; // hotspot change 1010 char alt_dirname[4] = { 0, 0, 0, 0 }; 1011 1012 if (dirp == 0) { 1013 errno = ENOMEM; 1014 return 0; 1015 } 1016 1017 /* 1018 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it 1019 * as a directory in FindFirstFile(). We detect this case here and 1020 * prepend the current drive name. 1021 */ 1022 if (dirname[1] == '\0' && dirname[0] == '\\') { 1023 alt_dirname[0] = _getdrive() + 'A' - 1; 1024 alt_dirname[1] = ':'; 1025 alt_dirname[2] = '\\'; 1026 alt_dirname[3] = '\0'; 1027 dirname = alt_dirname; 1028 } 1029 1030 dirp->path = (char *)malloc(strlen(dirname) + 5, mtInternal); 1031 if (dirp->path == 0) { 1032 free(dirp, mtInternal); 1033 errno = ENOMEM; 1034 return 0; 1035 } 1036 strcpy(dirp->path, dirname); 1037 1038 fattr = GetFileAttributes(dirp->path); 1039 if (fattr == 0xffffffff) { 1040 free(dirp->path, mtInternal); 1041 free(dirp, mtInternal); 1042 errno = ENOENT; 1043 return 0; 1044 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { 1045 free(dirp->path, mtInternal); 1046 free(dirp, mtInternal); 1047 errno = ENOTDIR; 1048 return 0; 1049 } 1050 1051 /* Append "*.*", or possibly "\\*.*", to path */ 1052 if (dirp->path[1] == ':' 1053 && (dirp->path[2] == '\0' 1054 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { 1055 /* No '\\' needed for cases like "Z:" or "Z:\" */ 1056 strcat(dirp->path, "*.*"); 1057 } else { 1058 strcat(dirp->path, "\\*.*"); 1059 } 1060 1061 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); 1062 if (dirp->handle == INVALID_HANDLE_VALUE) { 1063 if (GetLastError() != ERROR_FILE_NOT_FOUND) { 1064 free(dirp->path, mtInternal); 1065 free(dirp, mtInternal); 1066 errno = EACCES; 1067 return 0; 1068 } 1069 } 1070 return dirp; 1071} 1072 1073/* parameter dbuf unused on Windows */ 1074 1075struct dirent * 1076os::readdir(DIR *dirp, dirent *dbuf) 1077{ 1078 assert(dirp != NULL, "just checking"); // hotspot change 1079 if (dirp->handle == INVALID_HANDLE_VALUE) { 1080 return 0; 1081 } 1082 1083 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); 1084 1085 if (!FindNextFile(dirp->handle, &dirp->find_data)) { 1086 if (GetLastError() == ERROR_INVALID_HANDLE) { 1087 errno = EBADF; 1088 return 0; 1089 } 1090 FindClose(dirp->handle); 1091 dirp->handle = INVALID_HANDLE_VALUE; 1092 } 1093 1094 return &dirp->dirent; 1095} 1096 1097int 1098os::closedir(DIR *dirp) 1099{ 1100 assert(dirp != NULL, "just checking"); // hotspot change 1101 if (dirp->handle != INVALID_HANDLE_VALUE) { 1102 if (!FindClose(dirp->handle)) { 1103 errno = EBADF; 1104 return -1; 1105 } 1106 dirp->handle = INVALID_HANDLE_VALUE; 1107 } 1108 free(dirp->path, mtInternal); 1109 free(dirp, mtInternal); 1110 return 0; 1111} 1112 1113// This must be hard coded because it's the system's temporary 1114// directory not the java application's temp directory, ala java.io.tmpdir. 1115const char* os::get_temp_directory() { 1116 static char path_buf[MAX_PATH]; 1117 if (GetTempPath(MAX_PATH, path_buf)>0) 1118 return path_buf; 1119 else{ 1120 path_buf[0]='\0'; 1121 return path_buf; 1122 } 1123} 1124 1125static bool file_exists(const char* filename) { 1126 if (filename == NULL || strlen(filename) == 0) { 1127 return false; 1128 } 1129 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; 1130} 1131 1132bool os::dll_build_name(char *buffer, size_t buflen, 1133 const char* pname, const char* fname) { 1134 bool retval = false; 1135 const size_t pnamelen = pname ? strlen(pname) : 0; 1136 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; 1137 1138 // Return error on buffer overflow. 1139 if (pnamelen + strlen(fname) + 10 > buflen) { 1140 return retval; 1141 } 1142 1143 if (pnamelen == 0) { 1144 jio_snprintf(buffer, buflen, "%s.dll", fname); 1145 retval = true; 1146 } else if (c == ':' || c == '\\') { 1147 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); 1148 retval = true; 1149 } else if (strchr(pname, *os::path_separator()) != NULL) { 1150 int n; 1151 char** pelements = split_path(pname, &n); 1152 for (int i = 0 ; i < n ; i++) { 1153 char* path = pelements[i]; 1154 // Really shouldn't be NULL, but check can't hurt 1155 size_t plen = (path == NULL) ? 0 : strlen(path); 1156 if (plen == 0) { 1157 continue; // skip the empty path values 1158 } 1159 const char lastchar = path[plen - 1]; 1160 if (lastchar == ':' || lastchar == '\\') { 1161 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); 1162 } else { 1163 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); 1164 } 1165 if (file_exists(buffer)) { 1166 retval = true; 1167 break; 1168 } 1169 } 1170 // release the storage 1171 for (int i = 0 ; i < n ; i++) { 1172 if (pelements[i] != NULL) { 1173 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1174 } 1175 } 1176 if (pelements != NULL) { 1177 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1178 } 1179 } else { 1180 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); 1181 retval = true; 1182 } 1183 return retval; 1184} 1185 1186// Needs to be in os specific directory because windows requires another 1187// header file <direct.h> 1188const char* os::get_current_directory(char *buf, int buflen) { 1189 return _getcwd(buf, buflen); 1190} 1191 1192//----------------------------------------------------------- 1193// Helper functions for fatal error handler 1194#ifdef _WIN64 1195// Helper routine which returns true if address in 1196// within the NTDLL address space. 1197// 1198static bool _addr_in_ntdll( address addr ) 1199{ 1200 HMODULE hmod; 1201 MODULEINFO minfo; 1202 1203 hmod = GetModuleHandle("NTDLL.DLL"); 1204 if ( hmod == NULL ) return false; 1205 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod, 1206 &minfo, sizeof(MODULEINFO)) ) 1207 return false; 1208 1209 if ( (addr >= minfo.lpBaseOfDll) && 1210 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) 1211 return true; 1212 else 1213 return false; 1214} 1215#endif 1216 1217 1218// Enumerate all modules for a given process ID 1219// 1220// Notice that Windows 95/98/Me and Windows NT/2000/XP have 1221// different API for doing this. We use PSAPI.DLL on NT based 1222// Windows and ToolHelp on 95/98/Me. 1223 1224// Callback function that is called by enumerate_modules() on 1225// every DLL module. 1226// Input parameters: 1227// int pid, 1228// char* module_file_name, 1229// address module_base_addr, 1230// unsigned module_size, 1231// void* param 1232typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); 1233 1234// enumerate_modules for Windows NT, using PSAPI 1235static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) 1236{ 1237 HANDLE hProcess ; 1238 1239# define MAX_NUM_MODULES 128 1240 HMODULE modules[MAX_NUM_MODULES]; 1241 static char filename[ MAX_PATH ]; 1242 int result = 0; 1243 1244 if (!os::PSApiDll::PSApiAvailable()) { 1245 return 0; 1246 } 1247 1248 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 1249 FALSE, pid ) ; 1250 if (hProcess == NULL) return 0; 1251 1252 DWORD size_needed; 1253 if (!os::PSApiDll::EnumProcessModules(hProcess, modules, 1254 sizeof(modules), &size_needed)) { 1255 CloseHandle( hProcess ); 1256 return 0; 1257 } 1258 1259 // number of modules that are currently loaded 1260 int num_modules = size_needed / sizeof(HMODULE); 1261 1262 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { 1263 // Get Full pathname: 1264 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i], 1265 filename, sizeof(filename))) { 1266 filename[0] = '\0'; 1267 } 1268 1269 MODULEINFO modinfo; 1270 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i], 1271 &modinfo, sizeof(modinfo))) { 1272 modinfo.lpBaseOfDll = NULL; 1273 modinfo.SizeOfImage = 0; 1274 } 1275 1276 // Invoke callback function 1277 result = func(pid, filename, (address)modinfo.lpBaseOfDll, 1278 modinfo.SizeOfImage, param); 1279 if (result) break; 1280 } 1281 1282 CloseHandle( hProcess ) ; 1283 return result; 1284} 1285 1286 1287// enumerate_modules for Windows 95/98/ME, using TOOLHELP 1288static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) 1289{ 1290 HANDLE hSnapShot ; 1291 static MODULEENTRY32 modentry ; 1292 int result = 0; 1293 1294 if (!os::Kernel32Dll::HelpToolsAvailable()) { 1295 return 0; 1296 } 1297 1298 // Get a handle to a Toolhelp snapshot of the system 1299 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; 1300 if( hSnapShot == INVALID_HANDLE_VALUE ) { 1301 return FALSE ; 1302 } 1303 1304 // iterate through all modules 1305 modentry.dwSize = sizeof(MODULEENTRY32) ; 1306 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0; 1307 1308 while( not_done ) { 1309 // invoke the callback 1310 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, 1311 modentry.modBaseSize, param); 1312 if (result) break; 1313 1314 modentry.dwSize = sizeof(MODULEENTRY32) ; 1315 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0; 1316 } 1317 1318 CloseHandle(hSnapShot); 1319 return result; 1320} 1321 1322int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) 1323{ 1324 // Get current process ID if caller doesn't provide it. 1325 if (!pid) pid = os::current_process_id(); 1326 1327 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); 1328 else return _enumerate_modules_windows(pid, func, param); 1329} 1330 1331struct _modinfo { 1332 address addr; 1333 char* full_path; // point to a char buffer 1334 int buflen; // size of the buffer 1335 address base_addr; 1336}; 1337 1338static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, 1339 unsigned size, void * param) { 1340 struct _modinfo *pmod = (struct _modinfo *)param; 1341 if (!pmod) return -1; 1342 1343 if (base_addr <= pmod->addr && 1344 base_addr+size > pmod->addr) { 1345 // if a buffer is provided, copy path name to the buffer 1346 if (pmod->full_path) { 1347 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); 1348 } 1349 pmod->base_addr = base_addr; 1350 return 1; 1351 } 1352 return 0; 1353} 1354 1355bool os::dll_address_to_library_name(address addr, char* buf, 1356 int buflen, int* offset) { 1357// NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always 1358// return the full path to the DLL file, sometimes it returns path 1359// to the corresponding PDB file (debug info); sometimes it only 1360// returns partial path, which makes life painful. 1361 1362 struct _modinfo mi; 1363 mi.addr = addr; 1364 mi.full_path = buf; 1365 mi.buflen = buflen; 1366 int pid = os::current_process_id(); 1367 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { 1368 // buf already contains path name 1369 if (offset) *offset = addr - mi.base_addr; 1370 return true; 1371 } else { 1372 if (buf) buf[0] = '\0'; 1373 if (offset) *offset = -1; 1374 return false; 1375 } 1376} 1377 1378bool os::dll_address_to_function_name(address addr, char *buf, 1379 int buflen, int *offset) { 1380 if (Decoder::decode(addr, buf, buflen, offset)) { 1381 return true; 1382 } 1383 if (offset != NULL) *offset = -1; 1384 if (buf != NULL) buf[0] = '\0'; 1385 return false; 1386} 1387 1388// save the start and end address of jvm.dll into param[0] and param[1] 1389static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, 1390 unsigned size, void * param) { 1391 if (!param) return -1; 1392 1393 if (base_addr <= (address)_locate_jvm_dll && 1394 base_addr+size > (address)_locate_jvm_dll) { 1395 ((address*)param)[0] = base_addr; 1396 ((address*)param)[1] = base_addr + size; 1397 return 1; 1398 } 1399 return 0; 1400} 1401 1402address vm_lib_location[2]; // start and end address of jvm.dll 1403 1404// check if addr is inside jvm.dll 1405bool os::address_is_in_vm(address addr) { 1406 if (!vm_lib_location[0] || !vm_lib_location[1]) { 1407 int pid = os::current_process_id(); 1408 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { 1409 assert(false, "Can't find jvm module."); 1410 return false; 1411 } 1412 } 1413 1414 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); 1415} 1416 1417// print module info; param is outputStream* 1418static int _print_module(int pid, char* fname, address base, 1419 unsigned size, void* param) { 1420 if (!param) return -1; 1421 1422 outputStream* st = (outputStream*)param; 1423 1424 address end_addr = base + size; 1425 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); 1426 return 0; 1427} 1428 1429// Loads .dll/.so and 1430// in case of error it checks if .dll/.so was built for the 1431// same architecture as Hotspot is running on 1432void * os::dll_load(const char *name, char *ebuf, int ebuflen) 1433{ 1434 void * result = LoadLibrary(name); 1435 if (result != NULL) 1436 { 1437 return result; 1438 } 1439 1440 DWORD errcode = GetLastError(); 1441 if (errcode == ERROR_MOD_NOT_FOUND) { 1442 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); 1443 ebuf[ebuflen-1]='\0'; 1444 return NULL; 1445 } 1446 1447 // Parsing dll below 1448 // If we can read dll-info and find that dll was built 1449 // for an architecture other than Hotspot is running in 1450 // - then print to buffer "DLL was built for a different architecture" 1451 // else call os::lasterror to obtain system error message 1452 1453 // Read system error message into ebuf 1454 // It may or may not be overwritten below (in the for loop and just above) 1455 lasterror(ebuf, (size_t) ebuflen); 1456 ebuf[ebuflen-1]='\0'; 1457 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); 1458 if (file_descriptor<0) 1459 { 1460 return NULL; 1461 } 1462 1463 uint32_t signature_offset; 1464 uint16_t lib_arch=0; 1465 bool failed_to_get_lib_arch= 1466 ( 1467 //Go to position 3c in the dll 1468 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) 1469 || 1470 // Read loacation of signature 1471 (sizeof(signature_offset)!= 1472 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) 1473 || 1474 //Go to COFF File Header in dll 1475 //that is located after"signature" (4 bytes long) 1476 (os::seek_to_file_offset(file_descriptor, 1477 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) 1478 || 1479 //Read field that contains code of architecture 1480 // that dll was build for 1481 (sizeof(lib_arch)!= 1482 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) 1483 ); 1484 1485 ::close(file_descriptor); 1486 if (failed_to_get_lib_arch) 1487 { 1488 // file i/o error - report os::lasterror(...) msg 1489 return NULL; 1490 } 1491 1492 typedef struct 1493 { 1494 uint16_t arch_code; 1495 char* arch_name; 1496 } arch_t; 1497 1498 static const arch_t arch_array[]={ 1499 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, 1500 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, 1501 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} 1502 }; 1503 #if (defined _M_IA64) 1504 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; 1505 #elif (defined _M_AMD64) 1506 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; 1507 #elif (defined _M_IX86) 1508 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; 1509 #else 1510 #error Method os::dll_load requires that one of following \ 1511 is defined :_M_IA64,_M_AMD64 or _M_IX86 1512 #endif 1513 1514 1515 // Obtain a string for printf operation 1516 // lib_arch_str shall contain string what platform this .dll was built for 1517 // running_arch_str shall string contain what platform Hotspot was built for 1518 char *running_arch_str=NULL,*lib_arch_str=NULL; 1519 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) 1520 { 1521 if (lib_arch==arch_array[i].arch_code) 1522 lib_arch_str=arch_array[i].arch_name; 1523 if (running_arch==arch_array[i].arch_code) 1524 running_arch_str=arch_array[i].arch_name; 1525 } 1526 1527 assert(running_arch_str, 1528 "Didn't find runing architecture code in arch_array"); 1529 1530 // If the architure is right 1531 // but some other error took place - report os::lasterror(...) msg 1532 if (lib_arch == running_arch) 1533 { 1534 return NULL; 1535 } 1536 1537 if (lib_arch_str!=NULL) 1538 { 1539 ::_snprintf(ebuf, ebuflen-1, 1540 "Can't load %s-bit .dll on a %s-bit platform", 1541 lib_arch_str,running_arch_str); 1542 } 1543 else 1544 { 1545 // don't know what architecture this dll was build for 1546 ::_snprintf(ebuf, ebuflen-1, 1547 "Can't load this .dll (machine code=0x%x) on a %s-bit platform", 1548 lib_arch,running_arch_str); 1549 } 1550 1551 return NULL; 1552} 1553 1554 1555void os::print_dll_info(outputStream *st) { 1556 int pid = os::current_process_id(); 1557 st->print_cr("Dynamic libraries:"); 1558 enumerate_modules(pid, _print_module, (void *)st); 1559} 1560 1561void os::print_os_info_brief(outputStream* st) { 1562 os::print_os_info(st); 1563} 1564 1565void os::print_os_info(outputStream* st) { 1566 st->print("OS:"); 1567 1568 os::win32::print_windows_version(st); 1569} 1570 1571void os::win32::print_windows_version(outputStream* st) { 1572 OSVERSIONINFOEX osvi; 1573 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); 1574 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 1575 1576 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { 1577 st->print_cr("N/A"); 1578 return; 1579 } 1580 1581 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; 1582 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { 1583 switch (os_vers) { 1584 case 3051: st->print(" Windows NT 3.51"); break; 1585 case 4000: st->print(" Windows NT 4.0"); break; 1586 case 5000: st->print(" Windows 2000"); break; 1587 case 5001: st->print(" Windows XP"); break; 1588 case 5002: 1589 case 6000: 1590 case 6001: 1591 case 6002: { 1592 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could 1593 // find out whether we are running on 64 bit processor or not. 1594 SYSTEM_INFO si; 1595 ZeroMemory(&si, sizeof(SYSTEM_INFO)); 1596 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){ 1597 GetSystemInfo(&si); 1598 } else { 1599 os::Kernel32Dll::GetNativeSystemInfo(&si); 1600 } 1601 if (os_vers == 5002) { 1602 if (osvi.wProductType == VER_NT_WORKSTATION && 1603 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1604 st->print(" Windows XP x64 Edition"); 1605 else 1606 st->print(" Windows Server 2003 family"); 1607 } else if (os_vers == 6000) { 1608 if (osvi.wProductType == VER_NT_WORKSTATION) 1609 st->print(" Windows Vista"); 1610 else 1611 st->print(" Windows Server 2008"); 1612 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1613 st->print(" , 64 bit"); 1614 } else if (os_vers == 6001) { 1615 if (osvi.wProductType == VER_NT_WORKSTATION) { 1616 st->print(" Windows 7"); 1617 } else { 1618 // Unrecognized windows, print out its major and minor versions 1619 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1620 } 1621 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1622 st->print(" , 64 bit"); 1623 } else if (os_vers == 6002) { 1624 if (osvi.wProductType == VER_NT_WORKSTATION) { 1625 st->print(" Windows 8"); 1626 } else { 1627 st->print(" Windows Server 2012"); 1628 } 1629 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1630 st->print(" , 64 bit"); 1631 } else { // future os 1632 // Unrecognized windows, print out its major and minor versions 1633 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1634 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1635 st->print(" , 64 bit"); 1636 } 1637 break; 1638 } 1639 default: // future windows, print out its major and minor versions 1640 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1641 } 1642 } else { 1643 switch (os_vers) { 1644 case 4000: st->print(" Windows 95"); break; 1645 case 4010: st->print(" Windows 98"); break; 1646 case 4090: st->print(" Windows Me"); break; 1647 default: // future windows, print out its major and minor versions 1648 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1649 } 1650 } 1651 st->print(" Build %d", osvi.dwBuildNumber); 1652 st->print(" %s", osvi.szCSDVersion); // service pack 1653 st->cr(); 1654} 1655 1656void os::pd_print_cpu_info(outputStream* st) { 1657 // Nothing to do for now. 1658} 1659 1660void os::print_memory_info(outputStream* st) { 1661 st->print("Memory:"); 1662 st->print(" %dk page", os::vm_page_size()>>10); 1663 1664 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 1665 // value if total memory is larger than 4GB 1666 MEMORYSTATUSEX ms; 1667 ms.dwLength = sizeof(ms); 1668 GlobalMemoryStatusEx(&ms); 1669 1670 st->print(", physical %uk", os::physical_memory() >> 10); 1671 st->print("(%uk free)", os::available_memory() >> 10); 1672 1673 st->print(", swap %uk", ms.ullTotalPageFile >> 10); 1674 st->print("(%uk free)", ms.ullAvailPageFile >> 10); 1675 st->cr(); 1676} 1677 1678void os::print_siginfo(outputStream *st, void *siginfo) { 1679 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; 1680 st->print("siginfo:"); 1681 st->print(" ExceptionCode=0x%x", er->ExceptionCode); 1682 1683 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 1684 er->NumberParameters >= 2) { 1685 switch (er->ExceptionInformation[0]) { 1686 case 0: st->print(", reading address"); break; 1687 case 1: st->print(", writing address"); break; 1688 default: st->print(", ExceptionInformation=" INTPTR_FORMAT, 1689 er->ExceptionInformation[0]); 1690 } 1691 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); 1692 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && 1693 er->NumberParameters >= 2 && UseSharedSpaces) { 1694 FileMapInfo* mapinfo = FileMapInfo::current_info(); 1695 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { 1696 st->print("\n\nError accessing class data sharing archive." \ 1697 " Mapped file inaccessible during execution, " \ 1698 " possible disk/network problem."); 1699 } 1700 } else { 1701 int num = er->NumberParameters; 1702 if (num > 0) { 1703 st->print(", ExceptionInformation="); 1704 for (int i = 0; i < num; i++) { 1705 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); 1706 } 1707 } 1708 } 1709 st->cr(); 1710} 1711 1712void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 1713 // do nothing 1714} 1715 1716static char saved_jvm_path[MAX_PATH] = {0}; 1717 1718// Find the full path to the current module, jvm.dll 1719void os::jvm_path(char *buf, jint buflen) { 1720 // Error checking. 1721 if (buflen < MAX_PATH) { 1722 assert(false, "must use a large-enough buffer"); 1723 buf[0] = '\0'; 1724 return; 1725 } 1726 // Lazy resolve the path to current module. 1727 if (saved_jvm_path[0] != 0) { 1728 strcpy(buf, saved_jvm_path); 1729 return; 1730 } 1731 1732 buf[0] = '\0'; 1733 if (Arguments::created_by_gamma_launcher()) { 1734 // Support for the gamma launcher. Check for an 1735 // JAVA_HOME environment variable 1736 // and fix up the path so it looks like 1737 // libjvm.so is installed there (append a fake suffix 1738 // hotspot/libjvm.so). 1739 char* java_home_var = ::getenv("JAVA_HOME"); 1740 if (java_home_var != NULL && java_home_var[0] != 0) { 1741 1742 strncpy(buf, java_home_var, buflen); 1743 1744 // determine if this is a legacy image or modules image 1745 // modules image doesn't have "jre" subdirectory 1746 size_t len = strlen(buf); 1747 char* jrebin_p = buf + len; 1748 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\"); 1749 if (0 != _access(buf, 0)) { 1750 jio_snprintf(jrebin_p, buflen-len, "\\bin\\"); 1751 } 1752 len = strlen(buf); 1753 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll"); 1754 } 1755 } 1756 1757 if(buf[0] == '\0') { 1758 GetModuleFileName(vm_lib_handle, buf, buflen); 1759 } 1760 strcpy(saved_jvm_path, buf); 1761} 1762 1763 1764void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 1765#ifndef _WIN64 1766 st->print("_"); 1767#endif 1768} 1769 1770 1771void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 1772#ifndef _WIN64 1773 st->print("@%d", args_size * sizeof(int)); 1774#endif 1775} 1776 1777// This method is a copy of JDK's sysGetLastErrorString 1778// from src/windows/hpi/src/system_md.c 1779 1780size_t os::lasterror(char* buf, size_t len) { 1781 DWORD errval; 1782 1783 if ((errval = GetLastError()) != 0) { 1784 // DOS error 1785 size_t n = (size_t)FormatMessage( 1786 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, 1787 NULL, 1788 errval, 1789 0, 1790 buf, 1791 (DWORD)len, 1792 NULL); 1793 if (n > 3) { 1794 // Drop final '.', CR, LF 1795 if (buf[n - 1] == '\n') n--; 1796 if (buf[n - 1] == '\r') n--; 1797 if (buf[n - 1] == '.') n--; 1798 buf[n] = '\0'; 1799 } 1800 return n; 1801 } 1802 1803 if (errno != 0) { 1804 // C runtime error that has no corresponding DOS error code 1805 const char* s = strerror(errno); 1806 size_t n = strlen(s); 1807 if (n >= len) n = len - 1; 1808 strncpy(buf, s, n); 1809 buf[n] = '\0'; 1810 return n; 1811 } 1812 1813 return 0; 1814} 1815 1816int os::get_last_error() { 1817 DWORD error = GetLastError(); 1818 if (error == 0) 1819 error = errno; 1820 return (int)error; 1821} 1822 1823// sun.misc.Signal 1824// NOTE that this is a workaround for an apparent kernel bug where if 1825// a signal handler for SIGBREAK is installed then that signal handler 1826// takes priority over the console control handler for CTRL_CLOSE_EVENT. 1827// See bug 4416763. 1828static void (*sigbreakHandler)(int) = NULL; 1829 1830static void UserHandler(int sig, void *siginfo, void *context) { 1831 os::signal_notify(sig); 1832 // We need to reinstate the signal handler each time... 1833 os::signal(sig, (void*)UserHandler); 1834} 1835 1836void* os::user_handler() { 1837 return (void*) UserHandler; 1838} 1839 1840void* os::signal(int signal_number, void* handler) { 1841 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { 1842 void (*oldHandler)(int) = sigbreakHandler; 1843 sigbreakHandler = (void (*)(int)) handler; 1844 return (void*) oldHandler; 1845 } else { 1846 return (void*)::signal(signal_number, (void (*)(int))handler); 1847 } 1848} 1849 1850void os::signal_raise(int signal_number) { 1851 raise(signal_number); 1852} 1853 1854// The Win32 C runtime library maps all console control events other than ^C 1855// into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, 1856// logoff, and shutdown events. We therefore install our own console handler 1857// that raises SIGTERM for the latter cases. 1858// 1859static BOOL WINAPI consoleHandler(DWORD event) { 1860 switch(event) { 1861 case CTRL_C_EVENT: 1862 if (is_error_reported()) { 1863 // Ctrl-C is pressed during error reporting, likely because the error 1864 // handler fails to abort. Let VM die immediately. 1865 os::die(); 1866 } 1867 1868 os::signal_raise(SIGINT); 1869 return TRUE; 1870 break; 1871 case CTRL_BREAK_EVENT: 1872 if (sigbreakHandler != NULL) { 1873 (*sigbreakHandler)(SIGBREAK); 1874 } 1875 return TRUE; 1876 break; 1877 case CTRL_LOGOFF_EVENT: { 1878 // Don't terminate JVM if it is running in a non-interactive session, 1879 // such as a service process. 1880 USEROBJECTFLAGS flags; 1881 HANDLE handle = GetProcessWindowStation(); 1882 if (handle != NULL && 1883 GetUserObjectInformation(handle, UOI_FLAGS, &flags, 1884 sizeof( USEROBJECTFLAGS), NULL)) { 1885 // If it is a non-interactive session, let next handler to deal 1886 // with it. 1887 if ((flags.dwFlags & WSF_VISIBLE) == 0) { 1888 return FALSE; 1889 } 1890 } 1891 } 1892 case CTRL_CLOSE_EVENT: 1893 case CTRL_SHUTDOWN_EVENT: 1894 os::signal_raise(SIGTERM); 1895 return TRUE; 1896 break; 1897 default: 1898 break; 1899 } 1900 return FALSE; 1901} 1902 1903/* 1904 * The following code is moved from os.cpp for making this 1905 * code platform specific, which it is by its very nature. 1906 */ 1907 1908// Return maximum OS signal used + 1 for internal use only 1909// Used as exit signal for signal_thread 1910int os::sigexitnum_pd(){ 1911 return NSIG; 1912} 1913 1914// a counter for each possible signal value, including signal_thread exit signal 1915static volatile jint pending_signals[NSIG+1] = { 0 }; 1916static HANDLE sig_sem; 1917 1918void os::signal_init_pd() { 1919 // Initialize signal structures 1920 memset((void*)pending_signals, 0, sizeof(pending_signals)); 1921 1922 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); 1923 1924 // Programs embedding the VM do not want it to attempt to receive 1925 // events like CTRL_LOGOFF_EVENT, which are used to implement the 1926 // shutdown hooks mechanism introduced in 1.3. For example, when 1927 // the VM is run as part of a Windows NT service (i.e., a servlet 1928 // engine in a web server), the correct behavior is for any console 1929 // control handler to return FALSE, not TRUE, because the OS's 1930 // "final" handler for such events allows the process to continue if 1931 // it is a service (while terminating it if it is not a service). 1932 // To make this behavior uniform and the mechanism simpler, we 1933 // completely disable the VM's usage of these console events if -Xrs 1934 // (=ReduceSignalUsage) is specified. This means, for example, that 1935 // the CTRL-BREAK thread dump mechanism is also disabled in this 1936 // case. See bugs 4323062, 4345157, and related bugs. 1937 1938 if (!ReduceSignalUsage) { 1939 // Add a CTRL-C handler 1940 SetConsoleCtrlHandler(consoleHandler, TRUE); 1941 } 1942} 1943 1944void os::signal_notify(int signal_number) { 1945 BOOL ret; 1946 1947 Atomic::inc(&pending_signals[signal_number]); 1948 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); 1949 assert(ret != 0, "ReleaseSemaphore() failed"); 1950} 1951 1952static int check_pending_signals(bool wait_for_signal) { 1953 DWORD ret; 1954 while (true) { 1955 for (int i = 0; i < NSIG + 1; i++) { 1956 jint n = pending_signals[i]; 1957 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 1958 return i; 1959 } 1960 } 1961 if (!wait_for_signal) { 1962 return -1; 1963 } 1964 1965 JavaThread *thread = JavaThread::current(); 1966 1967 ThreadBlockInVM tbivm(thread); 1968 1969 bool threadIsSuspended; 1970 do { 1971 thread->set_suspend_equivalent(); 1972 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 1973 ret = ::WaitForSingleObject(sig_sem, INFINITE); 1974 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); 1975 1976 // were we externally suspended while we were waiting? 1977 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 1978 if (threadIsSuspended) { 1979 // 1980 // The semaphore has been incremented, but while we were waiting 1981 // another thread suspended us. We don't want to continue running 1982 // while suspended because that would surprise the thread that 1983 // suspended us. 1984 // 1985 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); 1986 assert(ret != 0, "ReleaseSemaphore() failed"); 1987 1988 thread->java_suspend_self(); 1989 } 1990 } while (threadIsSuspended); 1991 } 1992} 1993 1994int os::signal_lookup() { 1995 return check_pending_signals(false); 1996} 1997 1998int os::signal_wait() { 1999 return check_pending_signals(true); 2000} 2001 2002// Implicit OS exception handling 2003 2004LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { 2005 JavaThread* thread = JavaThread::current(); 2006 // Save pc in thread 2007#ifdef _M_IA64 2008 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); 2009 // Set pc to handler 2010 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; 2011#elif _M_AMD64 2012 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); 2013 // Set pc to handler 2014 exceptionInfo->ContextRecord->Rip = (DWORD64)handler; 2015#else 2016 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); 2017 // Set pc to handler 2018 exceptionInfo->ContextRecord->Eip = (LONG)handler; 2019#endif 2020 2021 // Continue the execution 2022 return EXCEPTION_CONTINUE_EXECUTION; 2023} 2024 2025 2026// Used for PostMortemDump 2027extern "C" void safepoints(); 2028extern "C" void find(int x); 2029extern "C" void events(); 2030 2031// According to Windows API documentation, an illegal instruction sequence should generate 2032// the 0xC000001C exception code. However, real world experience shows that occasionnaly 2033// the execution of an illegal instruction can generate the exception code 0xC000001E. This 2034// seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). 2035 2036#define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E 2037 2038// From "Execution Protection in the Windows Operating System" draft 0.35 2039// Once a system header becomes available, the "real" define should be 2040// included or copied here. 2041#define EXCEPTION_INFO_EXEC_VIOLATION 0x08 2042 2043#define def_excpt(val) #val, val 2044 2045struct siglabel { 2046 char *name; 2047 int number; 2048}; 2049 2050// All Visual C++ exceptions thrown from code generated by the Microsoft Visual 2051// C++ compiler contain this error code. Because this is a compiler-generated 2052// error, the code is not listed in the Win32 API header files. 2053// The code is actually a cryptic mnemonic device, with the initial "E" 2054// standing for "exception" and the final 3 bytes (0x6D7363) representing the 2055// ASCII values of "msc". 2056 2057#define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363 2058 2059 2060struct siglabel exceptlabels[] = { 2061 def_excpt(EXCEPTION_ACCESS_VIOLATION), 2062 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), 2063 def_excpt(EXCEPTION_BREAKPOINT), 2064 def_excpt(EXCEPTION_SINGLE_STEP), 2065 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), 2066 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), 2067 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), 2068 def_excpt(EXCEPTION_FLT_INEXACT_RESULT), 2069 def_excpt(EXCEPTION_FLT_INVALID_OPERATION), 2070 def_excpt(EXCEPTION_FLT_OVERFLOW), 2071 def_excpt(EXCEPTION_FLT_STACK_CHECK), 2072 def_excpt(EXCEPTION_FLT_UNDERFLOW), 2073 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), 2074 def_excpt(EXCEPTION_INT_OVERFLOW), 2075 def_excpt(EXCEPTION_PRIV_INSTRUCTION), 2076 def_excpt(EXCEPTION_IN_PAGE_ERROR), 2077 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), 2078 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), 2079 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), 2080 def_excpt(EXCEPTION_STACK_OVERFLOW), 2081 def_excpt(EXCEPTION_INVALID_DISPOSITION), 2082 def_excpt(EXCEPTION_GUARD_PAGE), 2083 def_excpt(EXCEPTION_INVALID_HANDLE), 2084 def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION), 2085 NULL, 0 2086}; 2087 2088const char* os::exception_name(int exception_code, char *buf, size_t size) { 2089 for (int i = 0; exceptlabels[i].name != NULL; i++) { 2090 if (exceptlabels[i].number == exception_code) { 2091 jio_snprintf(buf, size, "%s", exceptlabels[i].name); 2092 return buf; 2093 } 2094 } 2095 2096 return NULL; 2097} 2098 2099//----------------------------------------------------------------------------- 2100LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { 2101 // handle exception caused by idiv; should only happen for -MinInt/-1 2102 // (division by zero is handled explicitly) 2103#ifdef _M_IA64 2104 assert(0, "Fix Handle_IDiv_Exception"); 2105#elif _M_AMD64 2106 PCONTEXT ctx = exceptionInfo->ContextRecord; 2107 address pc = (address)ctx->Rip; 2108 assert(pc[0] == 0xF7, "not an idiv opcode"); 2109 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2110 assert(ctx->Rax == min_jint, "unexpected idiv exception"); 2111 // set correct result values and continue after idiv instruction 2112 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2113 ctx->Rax = (DWORD)min_jint; // result 2114 ctx->Rdx = (DWORD)0; // remainder 2115 // Continue the execution 2116#else 2117 PCONTEXT ctx = exceptionInfo->ContextRecord; 2118 address pc = (address)ctx->Eip; 2119 assert(pc[0] == 0xF7, "not an idiv opcode"); 2120 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2121 assert(ctx->Eax == min_jint, "unexpected idiv exception"); 2122 // set correct result values and continue after idiv instruction 2123 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2124 ctx->Eax = (DWORD)min_jint; // result 2125 ctx->Edx = (DWORD)0; // remainder 2126 // Continue the execution 2127#endif 2128 return EXCEPTION_CONTINUE_EXECUTION; 2129} 2130 2131#ifndef _WIN64 2132//----------------------------------------------------------------------------- 2133LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { 2134 // handle exception caused by native method modifying control word 2135 PCONTEXT ctx = exceptionInfo->ContextRecord; 2136 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2137 2138 switch (exception_code) { 2139 case EXCEPTION_FLT_DENORMAL_OPERAND: 2140 case EXCEPTION_FLT_DIVIDE_BY_ZERO: 2141 case EXCEPTION_FLT_INEXACT_RESULT: 2142 case EXCEPTION_FLT_INVALID_OPERATION: 2143 case EXCEPTION_FLT_OVERFLOW: 2144 case EXCEPTION_FLT_STACK_CHECK: 2145 case EXCEPTION_FLT_UNDERFLOW: 2146 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); 2147 if (fp_control_word != ctx->FloatSave.ControlWord) { 2148 // Restore FPCW and mask out FLT exceptions 2149 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; 2150 // Mask out pending FLT exceptions 2151 ctx->FloatSave.StatusWord &= 0xffffff00; 2152 return EXCEPTION_CONTINUE_EXECUTION; 2153 } 2154 } 2155 2156 if (prev_uef_handler != NULL) { 2157 // We didn't handle this exception so pass it to the previous 2158 // UnhandledExceptionFilter. 2159 return (prev_uef_handler)(exceptionInfo); 2160 } 2161 2162 return EXCEPTION_CONTINUE_SEARCH; 2163} 2164#else //_WIN64 2165/* 2166 On Windows, the mxcsr control bits are non-volatile across calls 2167 See also CR 6192333 2168 If EXCEPTION_FLT_* happened after some native method modified 2169 mxcsr - it is not a jvm fault. 2170 However should we decide to restore of mxcsr after a faulty 2171 native method we can uncomment following code 2172 jint MxCsr = INITIAL_MXCSR; 2173 // we can't use StubRoutines::addr_mxcsr_std() 2174 // because in Win64 mxcsr is not saved there 2175 if (MxCsr != ctx->MxCsr) { 2176 ctx->MxCsr = MxCsr; 2177 return EXCEPTION_CONTINUE_EXECUTION; 2178 } 2179 2180*/ 2181#endif //_WIN64 2182 2183 2184// Fatal error reporting is single threaded so we can make this a 2185// static and preallocated. If it's more than MAX_PATH silently ignore 2186// it. 2187static char saved_error_file[MAX_PATH] = {0}; 2188 2189void os::set_error_file(const char *logfile) { 2190 if (strlen(logfile) <= MAX_PATH) { 2191 strncpy(saved_error_file, logfile, MAX_PATH); 2192 } 2193} 2194 2195static inline void report_error(Thread* t, DWORD exception_code, 2196 address addr, void* siginfo, void* context) { 2197 VMError err(t, exception_code, addr, siginfo, context); 2198 err.report_and_die(); 2199 2200 // If UseOsErrorReporting, this will return here and save the error file 2201 // somewhere where we can find it in the minidump. 2202} 2203 2204//----------------------------------------------------------------------------- 2205LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { 2206 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; 2207 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2208#ifdef _M_IA64 2209 address pc = (address) exceptionInfo->ContextRecord->StIIP; 2210#elif _M_AMD64 2211 address pc = (address) exceptionInfo->ContextRecord->Rip; 2212#else 2213 address pc = (address) exceptionInfo->ContextRecord->Eip; 2214#endif 2215 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady 2216 2217#ifndef _WIN64 2218 // Execution protection violation - win32 running on AMD64 only 2219 // Handled first to avoid misdiagnosis as a "normal" access violation; 2220 // This is safe to do because we have a new/unique ExceptionInformation 2221 // code for this condition. 2222 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2223 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2224 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; 2225 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2226 2227 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { 2228 int page_size = os::vm_page_size(); 2229 2230 // Make sure the pc and the faulting address are sane. 2231 // 2232 // If an instruction spans a page boundary, and the page containing 2233 // the beginning of the instruction is executable but the following 2234 // page is not, the pc and the faulting address might be slightly 2235 // different - we still want to unguard the 2nd page in this case. 2236 // 2237 // 15 bytes seems to be a (very) safe value for max instruction size. 2238 bool pc_is_near_addr = 2239 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); 2240 bool instr_spans_page_boundary = 2241 (align_size_down((intptr_t) pc ^ (intptr_t) addr, 2242 (intptr_t) page_size) > 0); 2243 2244 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { 2245 static volatile address last_addr = 2246 (address) os::non_memory_address_word(); 2247 2248 // In conservative mode, don't unguard unless the address is in the VM 2249 if (UnguardOnExecutionViolation > 0 && addr != last_addr && 2250 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { 2251 2252 // Set memory to RWX and retry 2253 address page_start = 2254 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); 2255 bool res = os::protect_memory((char*) page_start, page_size, 2256 os::MEM_PROT_RWX); 2257 2258 if (PrintMiscellaneous && Verbose) { 2259 char buf[256]; 2260 jio_snprintf(buf, sizeof(buf), "Execution protection violation " 2261 "at " INTPTR_FORMAT 2262 ", unguarding " INTPTR_FORMAT ": %s", addr, 2263 page_start, (res ? "success" : strerror(errno))); 2264 tty->print_raw_cr(buf); 2265 } 2266 2267 // Set last_addr so if we fault again at the same address, we don't 2268 // end up in an endless loop. 2269 // 2270 // There are two potential complications here. Two threads trapping 2271 // at the same address at the same time could cause one of the 2272 // threads to think it already unguarded, and abort the VM. Likely 2273 // very rare. 2274 // 2275 // The other race involves two threads alternately trapping at 2276 // different addresses and failing to unguard the page, resulting in 2277 // an endless loop. This condition is probably even more unlikely 2278 // than the first. 2279 // 2280 // Although both cases could be avoided by using locks or thread 2281 // local last_addr, these solutions are unnecessary complication: 2282 // this handler is a best-effort safety net, not a complete solution. 2283 // It is disabled by default and should only be used as a workaround 2284 // in case we missed any no-execute-unsafe VM code. 2285 2286 last_addr = addr; 2287 2288 return EXCEPTION_CONTINUE_EXECUTION; 2289 } 2290 } 2291 2292 // Last unguard failed or not unguarding 2293 tty->print_raw_cr("Execution protection violation"); 2294 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, 2295 exceptionInfo->ContextRecord); 2296 return EXCEPTION_CONTINUE_SEARCH; 2297 } 2298 } 2299#endif // _WIN64 2300 2301 // Check to see if we caught the safepoint code in the 2302 // process of write protecting the memory serialization page. 2303 // It write enables the page immediately after protecting it 2304 // so just return. 2305 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 2306 JavaThread* thread = (JavaThread*) t; 2307 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2308 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2309 if ( os::is_memory_serialize_page(thread, addr) ) { 2310 // Block current thread until the memory serialize page permission restored. 2311 os::block_on_serialize_page_trap(); 2312 return EXCEPTION_CONTINUE_EXECUTION; 2313 } 2314 } 2315 2316 if (t != NULL && t->is_Java_thread()) { 2317 JavaThread* thread = (JavaThread*) t; 2318 bool in_java = thread->thread_state() == _thread_in_Java; 2319 2320 // Handle potential stack overflows up front. 2321 if (exception_code == EXCEPTION_STACK_OVERFLOW) { 2322 if (os::uses_stack_guard_pages()) { 2323#ifdef _M_IA64 2324 // 2325 // If it's a legal stack address continue, Windows will map it in. 2326 // 2327 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2328 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2329 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) 2330 return EXCEPTION_CONTINUE_EXECUTION; 2331 2332 // The register save area is the same size as the memory stack 2333 // and starts at the page just above the start of the memory stack. 2334 // If we get a fault in this area, we've run out of register 2335 // stack. If we are in java, try throwing a stack overflow exception. 2336 if (addr > thread->stack_base() && 2337 addr <= (thread->stack_base()+thread->stack_size()) ) { 2338 char buf[256]; 2339 jio_snprintf(buf, sizeof(buf), 2340 "Register stack overflow, addr:%p, stack_base:%p\n", 2341 addr, thread->stack_base() ); 2342 tty->print_raw_cr(buf); 2343 // If not in java code, return and hope for the best. 2344 return in_java ? Handle_Exception(exceptionInfo, 2345 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) 2346 : EXCEPTION_CONTINUE_EXECUTION; 2347 } 2348#endif 2349 if (thread->stack_yellow_zone_enabled()) { 2350 // Yellow zone violation. The o/s has unprotected the first yellow 2351 // zone page for us. Note: must call disable_stack_yellow_zone to 2352 // update the enabled status, even if the zone contains only one page. 2353 thread->disable_stack_yellow_zone(); 2354 // If not in java code, return and hope for the best. 2355 return in_java ? Handle_Exception(exceptionInfo, 2356 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) 2357 : EXCEPTION_CONTINUE_EXECUTION; 2358 } else { 2359 // Fatal red zone violation. 2360 thread->disable_stack_red_zone(); 2361 tty->print_raw_cr("An unrecoverable stack overflow has occurred."); 2362 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2363 exceptionInfo->ContextRecord); 2364 return EXCEPTION_CONTINUE_SEARCH; 2365 } 2366 } else if (in_java) { 2367 // JVM-managed guard pages cannot be used on win95/98. The o/s provides 2368 // a one-time-only guard page, which it has released to us. The next 2369 // stack overflow on this thread will result in an ACCESS_VIOLATION. 2370 return Handle_Exception(exceptionInfo, 2371 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2372 } else { 2373 // Can only return and hope for the best. Further stack growth will 2374 // result in an ACCESS_VIOLATION. 2375 return EXCEPTION_CONTINUE_EXECUTION; 2376 } 2377 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2378 // Either stack overflow or null pointer exception. 2379 if (in_java) { 2380 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2381 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2382 address stack_end = thread->stack_base() - thread->stack_size(); 2383 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { 2384 // Stack overflow. 2385 assert(!os::uses_stack_guard_pages(), 2386 "should be caught by red zone code above."); 2387 return Handle_Exception(exceptionInfo, 2388 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2389 } 2390 // 2391 // Check for safepoint polling and implicit null 2392 // We only expect null pointers in the stubs (vtable) 2393 // the rest are checked explicitly now. 2394 // 2395 CodeBlob* cb = CodeCache::find_blob(pc); 2396 if (cb != NULL) { 2397 if (os::is_poll_address(addr)) { 2398 address stub = SharedRuntime::get_poll_stub(pc); 2399 return Handle_Exception(exceptionInfo, stub); 2400 } 2401 } 2402 { 2403#ifdef _WIN64 2404 // 2405 // If it's a legal stack address map the entire region in 2406 // 2407 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2408 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2409 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { 2410 addr = (address)((uintptr_t)addr & 2411 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); 2412 os::commit_memory((char *)addr, thread->stack_base() - addr, 2413 false ); 2414 return EXCEPTION_CONTINUE_EXECUTION; 2415 } 2416 else 2417#endif 2418 { 2419 // Null pointer exception. 2420#ifdef _M_IA64 2421 // We catch register stack overflows in compiled code by doing 2422 // an explicit compare and executing a st8(G0, G0) if the 2423 // BSP enters into our guard area. We test for the overflow 2424 // condition and fall into the normal null pointer exception 2425 // code if BSP hasn't overflowed. 2426 if ( in_java ) { 2427 if(thread->register_stack_overflow()) { 2428 assert((address)exceptionInfo->ContextRecord->IntS3 == 2429 thread->register_stack_limit(), 2430 "GR7 doesn't contain register_stack_limit"); 2431 // Disable the yellow zone which sets the state that 2432 // we've got a stack overflow problem. 2433 if (thread->stack_yellow_zone_enabled()) { 2434 thread->disable_stack_yellow_zone(); 2435 } 2436 // Give us some room to process the exception 2437 thread->disable_register_stack_guard(); 2438 // Update GR7 with the new limit so we can continue running 2439 // compiled code. 2440 exceptionInfo->ContextRecord->IntS3 = 2441 (ULONGLONG)thread->register_stack_limit(); 2442 return Handle_Exception(exceptionInfo, 2443 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2444 } else { 2445 // 2446 // Check for implicit null 2447 // We only expect null pointers in the stubs (vtable) 2448 // the rest are checked explicitly now. 2449 // 2450 if (((uintptr_t)addr) < os::vm_page_size() ) { 2451 // an access to the first page of VM--assume it is a null pointer 2452 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 2453 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); 2454 } 2455 } 2456 } // in_java 2457 2458 // IA64 doesn't use implicit null checking yet. So we shouldn't 2459 // get here. 2460 tty->print_raw_cr("Access violation, possible null pointer exception"); 2461 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2462 exceptionInfo->ContextRecord); 2463 return EXCEPTION_CONTINUE_SEARCH; 2464#else /* !IA64 */ 2465 2466 // Windows 98 reports faulting addresses incorrectly 2467 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || 2468 !os::win32::is_nt()) { 2469 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 2470 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); 2471 } 2472 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2473 exceptionInfo->ContextRecord); 2474 return EXCEPTION_CONTINUE_SEARCH; 2475#endif 2476 } 2477 } 2478 } 2479 2480#ifdef _WIN64 2481 // Special care for fast JNI field accessors. 2482 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks 2483 // in and the heap gets shrunk before the field access. 2484 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2485 address addr = JNI_FastGetField::find_slowcase_pc(pc); 2486 if (addr != (address)-1) { 2487 return Handle_Exception(exceptionInfo, addr); 2488 } 2489 } 2490#endif 2491 2492 // Stack overflow or null pointer exception in native code. 2493 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2494 exceptionInfo->ContextRecord); 2495 return EXCEPTION_CONTINUE_SEARCH; 2496 } 2497 2498 if (in_java) { 2499 switch (exception_code) { 2500 case EXCEPTION_INT_DIVIDE_BY_ZERO: 2501 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); 2502 2503 case EXCEPTION_INT_OVERFLOW: 2504 return Handle_IDiv_Exception(exceptionInfo); 2505 2506 } // switch 2507 } 2508#ifndef _WIN64 2509 if (((thread->thread_state() == _thread_in_Java) || 2510 (thread->thread_state() == _thread_in_native)) && 2511 exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION) 2512 { 2513 LONG result=Handle_FLT_Exception(exceptionInfo); 2514 if (result==EXCEPTION_CONTINUE_EXECUTION) return result; 2515 } 2516#endif //_WIN64 2517 } 2518 2519 if (exception_code != EXCEPTION_BREAKPOINT) { 2520 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2521 exceptionInfo->ContextRecord); 2522 } 2523 return EXCEPTION_CONTINUE_SEARCH; 2524} 2525 2526#ifndef _WIN64 2527// Special care for fast JNI accessors. 2528// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and 2529// the heap gets shrunk before the field access. 2530// Need to install our own structured exception handler since native code may 2531// install its own. 2532LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { 2533 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2534 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2535 address pc = (address) exceptionInfo->ContextRecord->Eip; 2536 address addr = JNI_FastGetField::find_slowcase_pc(pc); 2537 if (addr != (address)-1) { 2538 return Handle_Exception(exceptionInfo, addr); 2539 } 2540 } 2541 return EXCEPTION_CONTINUE_SEARCH; 2542} 2543 2544#define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ 2545Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ 2546 __try { \ 2547 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ 2548 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ 2549 } \ 2550 return 0; \ 2551} 2552 2553DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) 2554DEFINE_FAST_GETFIELD(jbyte, byte, Byte) 2555DEFINE_FAST_GETFIELD(jchar, char, Char) 2556DEFINE_FAST_GETFIELD(jshort, short, Short) 2557DEFINE_FAST_GETFIELD(jint, int, Int) 2558DEFINE_FAST_GETFIELD(jlong, long, Long) 2559DEFINE_FAST_GETFIELD(jfloat, float, Float) 2560DEFINE_FAST_GETFIELD(jdouble, double, Double) 2561 2562address os::win32::fast_jni_accessor_wrapper(BasicType type) { 2563 switch (type) { 2564 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; 2565 case T_BYTE: return (address)jni_fast_GetByteField_wrapper; 2566 case T_CHAR: return (address)jni_fast_GetCharField_wrapper; 2567 case T_SHORT: return (address)jni_fast_GetShortField_wrapper; 2568 case T_INT: return (address)jni_fast_GetIntField_wrapper; 2569 case T_LONG: return (address)jni_fast_GetLongField_wrapper; 2570 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; 2571 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; 2572 default: ShouldNotReachHere(); 2573 } 2574 return (address)-1; 2575} 2576#endif 2577 2578// Virtual Memory 2579 2580int os::vm_page_size() { return os::win32::vm_page_size(); } 2581int os::vm_allocation_granularity() { 2582 return os::win32::vm_allocation_granularity(); 2583} 2584 2585// Windows large page support is available on Windows 2003. In order to use 2586// large page memory, the administrator must first assign additional privilege 2587// to the user: 2588// + select Control Panel -> Administrative Tools -> Local Security Policy 2589// + select Local Policies -> User Rights Assignment 2590// + double click "Lock pages in memory", add users and/or groups 2591// + reboot 2592// Note the above steps are needed for administrator as well, as administrators 2593// by default do not have the privilege to lock pages in memory. 2594// 2595// Note about Windows 2003: although the API supports committing large page 2596// memory on a page-by-page basis and VirtualAlloc() returns success under this 2597// scenario, I found through experiment it only uses large page if the entire 2598// memory region is reserved and committed in a single VirtualAlloc() call. 2599// This makes Windows large page support more or less like Solaris ISM, in 2600// that the entire heap must be committed upfront. This probably will change 2601// in the future, if so the code below needs to be revisited. 2602 2603#ifndef MEM_LARGE_PAGES 2604#define MEM_LARGE_PAGES 0x20000000 2605#endif 2606 2607static HANDLE _hProcess; 2608static HANDLE _hToken; 2609 2610// Container for NUMA node list info 2611class NUMANodeListHolder { 2612private: 2613 int *_numa_used_node_list; // allocated below 2614 int _numa_used_node_count; 2615 2616 void free_node_list() { 2617 if (_numa_used_node_list != NULL) { 2618 FREE_C_HEAP_ARRAY(int, _numa_used_node_list, mtInternal); 2619 } 2620 } 2621 2622public: 2623 NUMANodeListHolder() { 2624 _numa_used_node_count = 0; 2625 _numa_used_node_list = NULL; 2626 // do rest of initialization in build routine (after function pointers are set up) 2627 } 2628 2629 ~NUMANodeListHolder() { 2630 free_node_list(); 2631 } 2632 2633 bool build() { 2634 DWORD_PTR proc_aff_mask; 2635 DWORD_PTR sys_aff_mask; 2636 if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false; 2637 ULONG highest_node_number; 2638 if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false; 2639 free_node_list(); 2640 _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1, mtInternal); 2641 for (unsigned int i = 0; i <= highest_node_number; i++) { 2642 ULONGLONG proc_mask_numa_node; 2643 if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false; 2644 if ((proc_aff_mask & proc_mask_numa_node)!=0) { 2645 _numa_used_node_list[_numa_used_node_count++] = i; 2646 } 2647 } 2648 return (_numa_used_node_count > 1); 2649 } 2650 2651 int get_count() {return _numa_used_node_count;} 2652 int get_node_list_entry(int n) { 2653 // for indexes out of range, returns -1 2654 return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1); 2655 } 2656 2657} numa_node_list_holder; 2658 2659 2660 2661static size_t _large_page_size = 0; 2662 2663static bool resolve_functions_for_large_page_init() { 2664 return os::Kernel32Dll::GetLargePageMinimumAvailable() && 2665 os::Advapi32Dll::AdvapiAvailable(); 2666} 2667 2668static bool request_lock_memory_privilege() { 2669 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, 2670 os::current_process_id()); 2671 2672 LUID luid; 2673 if (_hProcess != NULL && 2674 os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && 2675 os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { 2676 2677 TOKEN_PRIVILEGES tp; 2678 tp.PrivilegeCount = 1; 2679 tp.Privileges[0].Luid = luid; 2680 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 2681 2682 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the 2683 // privilege. Check GetLastError() too. See MSDN document. 2684 if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && 2685 (GetLastError() == ERROR_SUCCESS)) { 2686 return true; 2687 } 2688 } 2689 2690 return false; 2691} 2692 2693static void cleanup_after_large_page_init() { 2694 if (_hProcess) CloseHandle(_hProcess); 2695 _hProcess = NULL; 2696 if (_hToken) CloseHandle(_hToken); 2697 _hToken = NULL; 2698} 2699 2700static bool numa_interleaving_init() { 2701 bool success = false; 2702 bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving); 2703 2704 // print a warning if UseNUMAInterleaving flag is specified on command line 2705 bool warn_on_failure = use_numa_interleaving_specified; 2706# define WARN(msg) if (warn_on_failure) { warning(msg); } 2707 2708 // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages) 2709 size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity(); 2710 NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity); 2711 2712 if (os::Kernel32Dll::NumaCallsAvailable()) { 2713 if (numa_node_list_holder.build()) { 2714 if (PrintMiscellaneous && Verbose) { 2715 tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count()); 2716 for (int i = 0; i < numa_node_list_holder.get_count(); i++) { 2717 tty->print("%d ", numa_node_list_holder.get_node_list_entry(i)); 2718 } 2719 tty->print("\n"); 2720 } 2721 success = true; 2722 } else { 2723 WARN("Process does not cover multiple NUMA nodes."); 2724 } 2725 } else { 2726 WARN("NUMA Interleaving is not supported by the operating system."); 2727 } 2728 if (!success) { 2729 if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag."); 2730 } 2731 return success; 2732#undef WARN 2733} 2734 2735// this routine is used whenever we need to reserve a contiguous VA range 2736// but we need to make separate VirtualAlloc calls for each piece of the range 2737// Reasons for doing this: 2738// * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise) 2739// * UseNUMAInterleaving requires a separate node for each piece 2740static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot, 2741 bool should_inject_error=false) { 2742 char * p_buf; 2743 // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size 2744 size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity(); 2745 size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size; 2746 2747 // first reserve enough address space in advance since we want to be 2748 // able to break a single contiguous virtual address range into multiple 2749 // large page commits but WS2003 does not allow reserving large page space 2750 // so we just use 4K pages for reserve, this gives us a legal contiguous 2751 // address space. then we will deallocate that reservation, and re alloc 2752 // using large pages 2753 const size_t size_of_reserve = bytes + chunk_size; 2754 if (bytes > size_of_reserve) { 2755 // Overflowed. 2756 return NULL; 2757 } 2758 p_buf = (char *) VirtualAlloc(addr, 2759 size_of_reserve, // size of Reserve 2760 MEM_RESERVE, 2761 PAGE_READWRITE); 2762 // If reservation failed, return NULL 2763 if (p_buf == NULL) return NULL; 2764 2765 os::release_memory(p_buf, bytes + chunk_size); 2766 2767 // we still need to round up to a page boundary (in case we are using large pages) 2768 // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size) 2769 // instead we handle this in the bytes_to_rq computation below 2770 p_buf = (char *) align_size_up((size_t)p_buf, page_size); 2771 2772 // now go through and allocate one chunk at a time until all bytes are 2773 // allocated 2774 size_t bytes_remaining = bytes; 2775 // An overflow of align_size_up() would have been caught above 2776 // in the calculation of size_of_reserve. 2777 char * next_alloc_addr = p_buf; 2778 HANDLE hProc = GetCurrentProcess(); 2779 2780#ifdef ASSERT 2781 // Variable for the failure injection 2782 long ran_num = os::random(); 2783 size_t fail_after = ran_num % bytes; 2784#endif 2785 2786 int count=0; 2787 while (bytes_remaining) { 2788 // select bytes_to_rq to get to the next chunk_size boundary 2789 2790 size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size)); 2791 // Note allocate and commit 2792 char * p_new; 2793 2794#ifdef ASSERT 2795 bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after); 2796#else 2797 const bool inject_error_now = false; 2798#endif 2799 2800 if (inject_error_now) { 2801 p_new = NULL; 2802 } else { 2803 if (!UseNUMAInterleaving) { 2804 p_new = (char *) VirtualAlloc(next_alloc_addr, 2805 bytes_to_rq, 2806 flags, 2807 prot); 2808 } else { 2809 // get the next node to use from the used_node_list 2810 assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected"); 2811 DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count()); 2812 p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc, 2813 next_alloc_addr, 2814 bytes_to_rq, 2815 flags, 2816 prot, 2817 node); 2818 } 2819 } 2820 2821 if (p_new == NULL) { 2822 // Free any allocated pages 2823 if (next_alloc_addr > p_buf) { 2824 // Some memory was committed so release it. 2825 size_t bytes_to_release = bytes - bytes_remaining; 2826 os::release_memory(p_buf, bytes_to_release); 2827 } 2828#ifdef ASSERT 2829 if (should_inject_error) { 2830 if (TracePageSizes && Verbose) { 2831 tty->print_cr("Reserving pages individually failed."); 2832 } 2833 } 2834#endif 2835 return NULL; 2836 } 2837 bytes_remaining -= bytes_to_rq; 2838 next_alloc_addr += bytes_to_rq; 2839 count++; 2840 } 2841 // made it this far, success 2842 return p_buf; 2843} 2844 2845 2846 2847void os::large_page_init() { 2848 if (!UseLargePages) return; 2849 2850 // print a warning if any large page related flag is specified on command line 2851 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2852 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2853 bool success = false; 2854 2855# define WARN(msg) if (warn_on_failure) { warning(msg); } 2856 if (resolve_functions_for_large_page_init()) { 2857 if (request_lock_memory_privilege()) { 2858 size_t s = os::Kernel32Dll::GetLargePageMinimum(); 2859 if (s) { 2860#if defined(IA32) || defined(AMD64) 2861 if (s > 4*M || LargePageSizeInBytes > 4*M) { 2862 WARN("JVM cannot use large pages bigger than 4mb."); 2863 } else { 2864#endif 2865 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { 2866 _large_page_size = LargePageSizeInBytes; 2867 } else { 2868 _large_page_size = s; 2869 } 2870 success = true; 2871#if defined(IA32) || defined(AMD64) 2872 } 2873#endif 2874 } else { 2875 WARN("Large page is not supported by the processor."); 2876 } 2877 } else { 2878 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); 2879 } 2880 } else { 2881 WARN("Large page is not supported by the operating system."); 2882 } 2883#undef WARN 2884 2885 const size_t default_page_size = (size_t) vm_page_size(); 2886 if (success && _large_page_size > default_page_size) { 2887 _page_sizes[0] = _large_page_size; 2888 _page_sizes[1] = default_page_size; 2889 _page_sizes[2] = 0; 2890 } 2891 2892 cleanup_after_large_page_init(); 2893 UseLargePages = success; 2894} 2895 2896// On win32, one cannot release just a part of reserved memory, it's an 2897// all or nothing deal. When we split a reservation, we must break the 2898// reservation into two reservations. 2899void os::pd_split_reserved_memory(char *base, size_t size, size_t split, 2900 bool realloc) { 2901 if (size > 0) { 2902 release_memory(base, size); 2903 if (realloc) { 2904 reserve_memory(split, base); 2905 } 2906 if (size != split) { 2907 reserve_memory(size - split, base + split); 2908 } 2909 } 2910} 2911 2912// Multiple threads can race in this code but it's not possible to unmap small sections of 2913// virtual space to get requested alignment, like posix-like os's. 2914// Windows prevents multiple thread from remapping over each other so this loop is thread-safe. 2915char* os::reserve_memory_aligned(size_t size, size_t alignment) { 2916 assert((alignment & (os::vm_allocation_granularity() - 1)) == 0, 2917 "Alignment must be a multiple of allocation granularity (page size)"); 2918 assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned"); 2919 2920 size_t extra_size = size + alignment; 2921 assert(extra_size >= size, "overflow, size is too large to allow alignment"); 2922 2923 char* aligned_base = NULL; 2924 2925 do { 2926 char* extra_base = os::reserve_memory(extra_size, NULL, alignment); 2927 if (extra_base == NULL) { 2928 return NULL; 2929 } 2930 // Do manual alignment 2931 aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment); 2932 2933 os::release_memory(extra_base, extra_size); 2934 2935 aligned_base = os::reserve_memory(size, aligned_base); 2936 2937 } while (aligned_base == NULL); 2938 2939 return aligned_base; 2940} 2941 2942char* os::pd_reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { 2943 assert((size_t)addr % os::vm_allocation_granularity() == 0, 2944 "reserve alignment"); 2945 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); 2946 char* res; 2947 // note that if UseLargePages is on, all the areas that require interleaving 2948 // will go thru reserve_memory_special rather than thru here. 2949 bool use_individual = (UseNUMAInterleaving && !UseLargePages); 2950 if (!use_individual) { 2951 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); 2952 } else { 2953 elapsedTimer reserveTimer; 2954 if( Verbose && PrintMiscellaneous ) reserveTimer.start(); 2955 // in numa interleaving, we have to allocate pages individually 2956 // (well really chunks of NUMAInterleaveGranularity size) 2957 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE); 2958 if (res == NULL) { 2959 warning("NUMA page allocation failed"); 2960 } 2961 if( Verbose && PrintMiscellaneous ) { 2962 reserveTimer.stop(); 2963 tty->print_cr("reserve_memory of %Ix bytes took " JLONG_FORMAT " ms (" JLONG_FORMAT " ticks)", bytes, 2964 reserveTimer.milliseconds(), reserveTimer.ticks()); 2965 } 2966 } 2967 assert(res == NULL || addr == NULL || addr == res, 2968 "Unexpected address from reserve."); 2969 2970 return res; 2971} 2972 2973// Reserve memory at an arbitrary address, only if that area is 2974// available (and not reserved for something else). 2975char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2976 // Windows os::reserve_memory() fails of the requested address range is 2977 // not avilable. 2978 return reserve_memory(bytes, requested_addr); 2979} 2980 2981size_t os::large_page_size() { 2982 return _large_page_size; 2983} 2984 2985bool os::can_commit_large_page_memory() { 2986 // Windows only uses large page memory when the entire region is reserved 2987 // and committed in a single VirtualAlloc() call. This may change in the 2988 // future, but with Windows 2003 it's not possible to commit on demand. 2989 return false; 2990} 2991 2992bool os::can_execute_large_page_memory() { 2993 return true; 2994} 2995 2996char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { 2997 2998 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; 2999 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 3000 3001 // with large pages, there are two cases where we need to use Individual Allocation 3002 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003) 3003 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page 3004 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) { 3005 if (TracePageSizes && Verbose) { 3006 tty->print_cr("Reserving large pages individually."); 3007 } 3008 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError); 3009 if (p_buf == NULL) { 3010 // give an appropriate warning message 3011 if (UseNUMAInterleaving) { 3012 warning("NUMA large page allocation failed, UseLargePages flag ignored"); 3013 } 3014 if (UseLargePagesIndividualAllocation) { 3015 warning("Individually allocated large pages failed, " 3016 "use -XX:-UseLargePagesIndividualAllocation to turn off"); 3017 } 3018 return NULL; 3019 } 3020 3021 return p_buf; 3022 3023 } else { 3024 // normal policy just allocate it all at once 3025 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 3026 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); 3027 return res; 3028 } 3029} 3030 3031bool os::release_memory_special(char* base, size_t bytes) { 3032 return release_memory(base, bytes); 3033} 3034 3035void os::print_statistics() { 3036} 3037 3038bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 3039 if (bytes == 0) { 3040 // Don't bother the OS with noops. 3041 return true; 3042 } 3043 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); 3044 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); 3045 // Don't attempt to print anything if the OS call fails. We're 3046 // probably low on resources, so the print itself may cause crashes. 3047 3048 // unless we have NUMAInterleaving enabled, the range of a commit 3049 // is always within a reserve covered by a single VirtualAlloc 3050 // in that case we can just do a single commit for the requested size 3051 if (!UseNUMAInterleaving) { 3052 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false; 3053 if (exec) { 3054 DWORD oldprot; 3055 // Windows doc says to use VirtualProtect to get execute permissions 3056 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false; 3057 } 3058 return true; 3059 } else { 3060 3061 // when NUMAInterleaving is enabled, the commit might cover a range that 3062 // came from multiple VirtualAlloc reserves (using allocate_pages_individually). 3063 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery 3064 // returns represents the number of bytes that can be committed in one step. 3065 size_t bytes_remaining = bytes; 3066 char * next_alloc_addr = addr; 3067 while (bytes_remaining > 0) { 3068 MEMORY_BASIC_INFORMATION alloc_info; 3069 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info)); 3070 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize); 3071 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL) 3072 return false; 3073 if (exec) { 3074 DWORD oldprot; 3075 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot)) 3076 return false; 3077 } 3078 bytes_remaining -= bytes_to_rq; 3079 next_alloc_addr += bytes_to_rq; 3080 } 3081 } 3082 // if we made it this far, return true 3083 return true; 3084} 3085 3086bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, 3087 bool exec) { 3088 return commit_memory(addr, size, exec); 3089} 3090 3091bool os::pd_uncommit_memory(char* addr, size_t bytes) { 3092 if (bytes == 0) { 3093 // Don't bother the OS with noops. 3094 return true; 3095 } 3096 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); 3097 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); 3098 return (VirtualFree(addr, bytes, MEM_DECOMMIT) != 0); 3099} 3100 3101bool os::pd_release_memory(char* addr, size_t bytes) { 3102 return VirtualFree(addr, 0, MEM_RELEASE) != 0; 3103} 3104 3105bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 3106 return os::commit_memory(addr, size); 3107} 3108 3109bool os::remove_stack_guard_pages(char* addr, size_t size) { 3110 return os::uncommit_memory(addr, size); 3111} 3112 3113// Set protections specified 3114bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3115 bool is_committed) { 3116 unsigned int p = 0; 3117 switch (prot) { 3118 case MEM_PROT_NONE: p = PAGE_NOACCESS; break; 3119 case MEM_PROT_READ: p = PAGE_READONLY; break; 3120 case MEM_PROT_RW: p = PAGE_READWRITE; break; 3121 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; 3122 default: 3123 ShouldNotReachHere(); 3124 } 3125 3126 DWORD old_status; 3127 3128 // Strange enough, but on Win32 one can change protection only for committed 3129 // memory, not a big deal anyway, as bytes less or equal than 64K 3130 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { 3131 fatal("cannot commit protection page"); 3132 } 3133 // One cannot use os::guard_memory() here, as on Win32 guard page 3134 // have different (one-shot) semantics, from MSDN on PAGE_GUARD: 3135 // 3136 // Pages in the region become guard pages. Any attempt to access a guard page 3137 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off 3138 // the guard page status. Guard pages thus act as a one-time access alarm. 3139 return VirtualProtect(addr, bytes, p, &old_status) != 0; 3140} 3141 3142bool os::guard_memory(char* addr, size_t bytes) { 3143 DWORD old_status; 3144 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; 3145} 3146 3147bool os::unguard_memory(char* addr, size_t bytes) { 3148 DWORD old_status; 3149 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; 3150} 3151 3152void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3153void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3154void os::numa_make_global(char *addr, size_t bytes) { } 3155void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } 3156bool os::numa_topology_changed() { return false; } 3157size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); } 3158int os::numa_get_group_id() { return 0; } 3159size_t os::numa_get_leaf_groups(int *ids, size_t size) { 3160 if (numa_node_list_holder.get_count() == 0 && size > 0) { 3161 // Provide an answer for UMA systems 3162 ids[0] = 0; 3163 return 1; 3164 } else { 3165 // check for size bigger than actual groups_num 3166 size = MIN2(size, numa_get_groups_num()); 3167 for (int i = 0; i < (int)size; i++) { 3168 ids[i] = numa_node_list_holder.get_node_list_entry(i); 3169 } 3170 return size; 3171 } 3172} 3173 3174bool os::get_page_info(char *start, page_info* info) { 3175 return false; 3176} 3177 3178char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 3179 return end; 3180} 3181 3182char* os::non_memory_address_word() { 3183 // Must never look like an address returned by reserve_memory, 3184 // even in its subfields (as defined by the CPU immediate fields, 3185 // if the CPU splits constants across multiple instructions). 3186 return (char*)-1; 3187} 3188 3189#define MAX_ERROR_COUNT 100 3190#define SYS_THREAD_ERROR 0xffffffffUL 3191 3192void os::pd_start_thread(Thread* thread) { 3193 DWORD ret = ResumeThread(thread->osthread()->thread_handle()); 3194 // Returns previous suspend state: 3195 // 0: Thread was not suspended 3196 // 1: Thread is running now 3197 // >1: Thread is still suspended. 3198 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back 3199} 3200 3201class HighResolutionInterval { 3202 // The default timer resolution seems to be 10 milliseconds. 3203 // (Where is this written down?) 3204 // If someone wants to sleep for only a fraction of the default, 3205 // then we set the timer resolution down to 1 millisecond for 3206 // the duration of their interval. 3207 // We carefully set the resolution back, since otherwise we 3208 // seem to incur an overhead (3%?) that we don't need. 3209 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. 3210 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). 3211 // Alternatively, we could compute the relative error (503/500 = .6%) and only use 3212 // timeBeginPeriod() if the relative error exceeded some threshold. 3213 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and 3214 // to decreased efficiency related to increased timer "tick" rates. We want to minimize 3215 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high 3216 // resolution timers running. 3217private: 3218 jlong resolution; 3219public: 3220 HighResolutionInterval(jlong ms) { 3221 resolution = ms % 10L; 3222 if (resolution != 0) { 3223 MMRESULT result = timeBeginPeriod(1L); 3224 } 3225 } 3226 ~HighResolutionInterval() { 3227 if (resolution != 0) { 3228 MMRESULT result = timeEndPeriod(1L); 3229 } 3230 resolution = 0L; 3231 } 3232}; 3233 3234int os::sleep(Thread* thread, jlong ms, bool interruptable) { 3235 jlong limit = (jlong) MAXDWORD; 3236 3237 while(ms > limit) { 3238 int res; 3239 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) 3240 return res; 3241 ms -= limit; 3242 } 3243 3244 assert(thread == Thread::current(), "thread consistency check"); 3245 OSThread* osthread = thread->osthread(); 3246 OSThreadWaitState osts(osthread, false /* not Object.wait() */); 3247 int result; 3248 if (interruptable) { 3249 assert(thread->is_Java_thread(), "must be java thread"); 3250 JavaThread *jt = (JavaThread *) thread; 3251 ThreadBlockInVM tbivm(jt); 3252 3253 jt->set_suspend_equivalent(); 3254 // cleared by handle_special_suspend_equivalent_condition() or 3255 // java_suspend_self() via check_and_wait_while_suspended() 3256 3257 HANDLE events[1]; 3258 events[0] = osthread->interrupt_event(); 3259 HighResolutionInterval *phri=NULL; 3260 if(!ForceTimeHighResolution) 3261 phri = new HighResolutionInterval( ms ); 3262 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { 3263 result = OS_TIMEOUT; 3264 } else { 3265 ResetEvent(osthread->interrupt_event()); 3266 osthread->set_interrupted(false); 3267 result = OS_INTRPT; 3268 } 3269 delete phri; //if it is NULL, harmless 3270 3271 // were we externally suspended while we were waiting? 3272 jt->check_and_wait_while_suspended(); 3273 } else { 3274 assert(!thread->is_Java_thread(), "must not be java thread"); 3275 Sleep((long) ms); 3276 result = OS_TIMEOUT; 3277 } 3278 return result; 3279} 3280 3281// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3282void os::infinite_sleep() { 3283 while (true) { // sleep forever ... 3284 Sleep(100000); // ... 100 seconds at a time 3285 } 3286} 3287 3288typedef BOOL (WINAPI * STTSignature)(void) ; 3289 3290os::YieldResult os::NakedYield() { 3291 // Use either SwitchToThread() or Sleep(0) 3292 // Consider passing back the return value from SwitchToThread(). 3293 if (os::Kernel32Dll::SwitchToThreadAvailable()) { 3294 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; 3295 } else { 3296 Sleep(0); 3297 } 3298 return os::YIELD_UNKNOWN ; 3299} 3300 3301void os::yield() { os::NakedYield(); } 3302 3303void os::yield_all(int attempts) { 3304 // Yields to all threads, including threads with lower priorities 3305 Sleep(1); 3306} 3307 3308// Win32 only gives you access to seven real priorities at a time, 3309// so we compress Java's ten down to seven. It would be better 3310// if we dynamically adjusted relative priorities. 3311 3312int os::java_to_os_priority[CriticalPriority + 1] = { 3313 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3314 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3315 THREAD_PRIORITY_LOWEST, // 2 3316 THREAD_PRIORITY_BELOW_NORMAL, // 3 3317 THREAD_PRIORITY_BELOW_NORMAL, // 4 3318 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3319 THREAD_PRIORITY_NORMAL, // 6 3320 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3321 THREAD_PRIORITY_ABOVE_NORMAL, // 8 3322 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3323 THREAD_PRIORITY_HIGHEST, // 10 MaxPriority 3324 THREAD_PRIORITY_HIGHEST // 11 CriticalPriority 3325}; 3326 3327int prio_policy1[CriticalPriority + 1] = { 3328 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3329 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3330 THREAD_PRIORITY_LOWEST, // 2 3331 THREAD_PRIORITY_BELOW_NORMAL, // 3 3332 THREAD_PRIORITY_BELOW_NORMAL, // 4 3333 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3334 THREAD_PRIORITY_ABOVE_NORMAL, // 6 3335 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3336 THREAD_PRIORITY_HIGHEST, // 8 3337 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3338 THREAD_PRIORITY_TIME_CRITICAL, // 10 MaxPriority 3339 THREAD_PRIORITY_TIME_CRITICAL // 11 CriticalPriority 3340}; 3341 3342static int prio_init() { 3343 // If ThreadPriorityPolicy is 1, switch tables 3344 if (ThreadPriorityPolicy == 1) { 3345 int i; 3346 for (i = 0; i < CriticalPriority + 1; i++) { 3347 os::java_to_os_priority[i] = prio_policy1[i]; 3348 } 3349 } 3350 if (UseCriticalJavaThreadPriority) { 3351 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority] ; 3352 } 3353 return 0; 3354} 3355 3356OSReturn os::set_native_priority(Thread* thread, int priority) { 3357 if (!UseThreadPriorities) return OS_OK; 3358 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; 3359 return ret ? OS_OK : OS_ERR; 3360} 3361 3362OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { 3363 if ( !UseThreadPriorities ) { 3364 *priority_ptr = java_to_os_priority[NormPriority]; 3365 return OS_OK; 3366 } 3367 int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); 3368 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { 3369 assert(false, "GetThreadPriority failed"); 3370 return OS_ERR; 3371 } 3372 *priority_ptr = os_prio; 3373 return OS_OK; 3374} 3375 3376 3377// Hint to the underlying OS that a task switch would not be good. 3378// Void return because it's a hint and can fail. 3379void os::hint_no_preempt() {} 3380 3381void os::interrupt(Thread* thread) { 3382 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3383 "possibility of dangling Thread pointer"); 3384 3385 OSThread* osthread = thread->osthread(); 3386 osthread->set_interrupted(true); 3387 // More than one thread can get here with the same value of osthread, 3388 // resulting in multiple notifications. We do, however, want the store 3389 // to interrupted() to be visible to other threads before we post 3390 // the interrupt event. 3391 OrderAccess::release(); 3392 SetEvent(osthread->interrupt_event()); 3393 // For JSR166: unpark after setting status 3394 if (thread->is_Java_thread()) 3395 ((JavaThread*)thread)->parker()->unpark(); 3396 3397 ParkEvent * ev = thread->_ParkEvent ; 3398 if (ev != NULL) ev->unpark() ; 3399 3400} 3401 3402 3403bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3404 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3405 "possibility of dangling Thread pointer"); 3406 3407 OSThread* osthread = thread->osthread(); 3408 bool interrupted = osthread->interrupted(); 3409 // There is no synchronization between the setting of the interrupt 3410 // and it being cleared here. It is critical - see 6535709 - that 3411 // we only clear the interrupt state, and reset the interrupt event, 3412 // if we are going to report that we were indeed interrupted - else 3413 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups 3414 // depending on the timing 3415 if (interrupted && clear_interrupted) { 3416 osthread->set_interrupted(false); 3417 ResetEvent(osthread->interrupt_event()); 3418 } // Otherwise leave the interrupted state alone 3419 3420 return interrupted; 3421} 3422 3423// Get's a pc (hint) for a running thread. Currently used only for profiling. 3424ExtendedPC os::get_thread_pc(Thread* thread) { 3425 CONTEXT context; 3426 context.ContextFlags = CONTEXT_CONTROL; 3427 HANDLE handle = thread->osthread()->thread_handle(); 3428#ifdef _M_IA64 3429 assert(0, "Fix get_thread_pc"); 3430 return ExtendedPC(NULL); 3431#else 3432 if (GetThreadContext(handle, &context)) { 3433#ifdef _M_AMD64 3434 return ExtendedPC((address) context.Rip); 3435#else 3436 return ExtendedPC((address) context.Eip); 3437#endif 3438 } else { 3439 return ExtendedPC(NULL); 3440 } 3441#endif 3442} 3443 3444// GetCurrentThreadId() returns DWORD 3445intx os::current_thread_id() { return GetCurrentThreadId(); } 3446 3447static int _initial_pid = 0; 3448 3449int os::current_process_id() 3450{ 3451 return (_initial_pid ? _initial_pid : _getpid()); 3452} 3453 3454int os::win32::_vm_page_size = 0; 3455int os::win32::_vm_allocation_granularity = 0; 3456int os::win32::_processor_type = 0; 3457// Processor level is not available on non-NT systems, use vm_version instead 3458int os::win32::_processor_level = 0; 3459julong os::win32::_physical_memory = 0; 3460size_t os::win32::_default_stack_size = 0; 3461 3462 intx os::win32::_os_thread_limit = 0; 3463volatile intx os::win32::_os_thread_count = 0; 3464 3465bool os::win32::_is_nt = false; 3466bool os::win32::_is_windows_2003 = false; 3467bool os::win32::_is_windows_server = false; 3468 3469void os::win32::initialize_system_info() { 3470 SYSTEM_INFO si; 3471 GetSystemInfo(&si); 3472 _vm_page_size = si.dwPageSize; 3473 _vm_allocation_granularity = si.dwAllocationGranularity; 3474 _processor_type = si.dwProcessorType; 3475 _processor_level = si.wProcessorLevel; 3476 set_processor_count(si.dwNumberOfProcessors); 3477 3478 MEMORYSTATUSEX ms; 3479 ms.dwLength = sizeof(ms); 3480 3481 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, 3482 // dwMemoryLoad (% of memory in use) 3483 GlobalMemoryStatusEx(&ms); 3484 _physical_memory = ms.ullTotalPhys; 3485 3486 OSVERSIONINFOEX oi; 3487 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 3488 GetVersionEx((OSVERSIONINFO*)&oi); 3489 switch(oi.dwPlatformId) { 3490 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; 3491 case VER_PLATFORM_WIN32_NT: 3492 _is_nt = true; 3493 { 3494 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; 3495 if (os_vers == 5002) { 3496 _is_windows_2003 = true; 3497 } 3498 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER || 3499 oi.wProductType == VER_NT_SERVER) { 3500 _is_windows_server = true; 3501 } 3502 } 3503 break; 3504 default: fatal("Unknown platform"); 3505 } 3506 3507 _default_stack_size = os::current_stack_size(); 3508 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); 3509 assert((_default_stack_size & (_vm_page_size - 1)) == 0, 3510 "stack size not a multiple of page size"); 3511 3512 initialize_performance_counter(); 3513 3514 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is 3515 // known to deadlock the system, if the VM issues to thread operations with 3516 // a too high frequency, e.g., such as changing the priorities. 3517 // The 6000 seems to work well - no deadlocks has been notices on the test 3518 // programs that we have seen experience this problem. 3519 if (!os::win32::is_nt()) { 3520 StarvationMonitorInterval = 6000; 3521 } 3522} 3523 3524 3525HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) { 3526 char path[MAX_PATH]; 3527 DWORD size; 3528 DWORD pathLen = (DWORD)sizeof(path); 3529 HINSTANCE result = NULL; 3530 3531 // only allow library name without path component 3532 assert(strchr(name, '\\') == NULL, "path not allowed"); 3533 assert(strchr(name, ':') == NULL, "path not allowed"); 3534 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) { 3535 jio_snprintf(ebuf, ebuflen, 3536 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name); 3537 return NULL; 3538 } 3539 3540 // search system directory 3541 if ((size = GetSystemDirectory(path, pathLen)) > 0) { 3542 strcat(path, "\\"); 3543 strcat(path, name); 3544 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3545 return result; 3546 } 3547 } 3548 3549 // try Windows directory 3550 if ((size = GetWindowsDirectory(path, pathLen)) > 0) { 3551 strcat(path, "\\"); 3552 strcat(path, name); 3553 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3554 return result; 3555 } 3556 } 3557 3558 jio_snprintf(ebuf, ebuflen, 3559 "os::win32::load_windows_dll() cannot load %s from system directories.", name); 3560 return NULL; 3561} 3562 3563void os::win32::setmode_streams() { 3564 _setmode(_fileno(stdin), _O_BINARY); 3565 _setmode(_fileno(stdout), _O_BINARY); 3566 _setmode(_fileno(stderr), _O_BINARY); 3567} 3568 3569 3570bool os::is_debugger_attached() { 3571 return IsDebuggerPresent() ? true : false; 3572} 3573 3574 3575void os::wait_for_keypress_at_exit(void) { 3576 if (PauseAtExit) { 3577 fprintf(stderr, "Press any key to continue...\n"); 3578 fgetc(stdin); 3579 } 3580} 3581 3582 3583int os::message_box(const char* title, const char* message) { 3584 int result = MessageBox(NULL, message, title, 3585 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); 3586 return result == IDYES; 3587} 3588 3589int os::allocate_thread_local_storage() { 3590 return TlsAlloc(); 3591} 3592 3593 3594void os::free_thread_local_storage(int index) { 3595 TlsFree(index); 3596} 3597 3598 3599void os::thread_local_storage_at_put(int index, void* value) { 3600 TlsSetValue(index, value); 3601 assert(thread_local_storage_at(index) == value, "Just checking"); 3602} 3603 3604 3605void* os::thread_local_storage_at(int index) { 3606 return TlsGetValue(index); 3607} 3608 3609 3610#ifndef PRODUCT 3611#ifndef _WIN64 3612// Helpers to check whether NX protection is enabled 3613int nx_exception_filter(_EXCEPTION_POINTERS *pex) { 3614 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 3615 pex->ExceptionRecord->NumberParameters > 0 && 3616 pex->ExceptionRecord->ExceptionInformation[0] == 3617 EXCEPTION_INFO_EXEC_VIOLATION) { 3618 return EXCEPTION_EXECUTE_HANDLER; 3619 } 3620 return EXCEPTION_CONTINUE_SEARCH; 3621} 3622 3623void nx_check_protection() { 3624 // If NX is enabled we'll get an exception calling into code on the stack 3625 char code[] = { (char)0xC3 }; // ret 3626 void *code_ptr = (void *)code; 3627 __try { 3628 __asm call code_ptr 3629 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { 3630 tty->print_raw_cr("NX protection detected."); 3631 } 3632} 3633#endif // _WIN64 3634#endif // PRODUCT 3635 3636// this is called _before_ the global arguments have been parsed 3637void os::init(void) { 3638 _initial_pid = _getpid(); 3639 3640 init_random(1234567); 3641 3642 win32::initialize_system_info(); 3643 win32::setmode_streams(); 3644 init_page_sizes((size_t) win32::vm_page_size()); 3645 3646 // For better scalability on MP systems (must be called after initialize_system_info) 3647#ifndef PRODUCT 3648 if (is_MP()) { 3649 NoYieldsInMicrolock = true; 3650 } 3651#endif 3652 // This may be overridden later when argument processing is done. 3653 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, 3654 os::win32::is_windows_2003()); 3655 3656 // Initialize main_process and main_thread 3657 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle 3658 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, 3659 &main_thread, THREAD_ALL_ACCESS, false, 0)) { 3660 fatal("DuplicateHandle failed\n"); 3661 } 3662 main_thread_id = (int) GetCurrentThreadId(); 3663} 3664 3665// To install functions for atexit processing 3666extern "C" { 3667 static void perfMemory_exit_helper() { 3668 perfMemory_exit(); 3669 } 3670} 3671 3672// this is called _after_ the global arguments have been parsed 3673jint os::init_2(void) { 3674 // Allocate a single page and mark it as readable for safepoint polling 3675 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); 3676 guarantee( polling_page != NULL, "Reserve Failed for polling page"); 3677 3678 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); 3679 guarantee( return_page != NULL, "Commit Failed for polling page"); 3680 3681 os::set_polling_page( polling_page ); 3682 3683#ifndef PRODUCT 3684 if( Verbose && PrintMiscellaneous ) 3685 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 3686#endif 3687 3688 if (!UseMembar) { 3689 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); 3690 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); 3691 3692 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); 3693 guarantee( return_page != NULL, "Commit Failed for memory serialize page"); 3694 3695 os::set_memory_serialize_page( mem_serialize_page ); 3696 3697#ifndef PRODUCT 3698 if(Verbose && PrintMiscellaneous) 3699 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 3700#endif 3701 } 3702 3703 os::large_page_init(); 3704 3705 // Setup Windows Exceptions 3706 3707 // for debugging float code generation bugs 3708 if (ForceFloatExceptions) { 3709#ifndef _WIN64 3710 static long fp_control_word = 0; 3711 __asm { fstcw fp_control_word } 3712 // see Intel PPro Manual, Vol. 2, p 7-16 3713 const long precision = 0x20; 3714 const long underflow = 0x10; 3715 const long overflow = 0x08; 3716 const long zero_div = 0x04; 3717 const long denorm = 0x02; 3718 const long invalid = 0x01; 3719 fp_control_word |= invalid; 3720 __asm { fldcw fp_control_word } 3721#endif 3722 } 3723 3724 // If stack_commit_size is 0, windows will reserve the default size, 3725 // but only commit a small portion of it. 3726 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); 3727 size_t default_reserve_size = os::win32::default_stack_size(); 3728 size_t actual_reserve_size = stack_commit_size; 3729 if (stack_commit_size < default_reserve_size) { 3730 // If stack_commit_size == 0, we want this too 3731 actual_reserve_size = default_reserve_size; 3732 } 3733 3734 // Check minimum allowable stack size for thread creation and to initialize 3735 // the java system classes, including StackOverflowError - depends on page 3736 // size. Add a page for compiler2 recursion in main thread. 3737 // Add in 2*BytesPerWord times page size to account for VM stack during 3738 // class initialization depending on 32 or 64 bit VM. 3739 size_t min_stack_allowed = 3740 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 3741 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size(); 3742 if (actual_reserve_size < min_stack_allowed) { 3743 tty->print_cr("\nThe stack size specified is too small, " 3744 "Specify at least %dk", 3745 min_stack_allowed / K); 3746 return JNI_ERR; 3747 } 3748 3749 JavaThread::set_stack_size_at_create(stack_commit_size); 3750 3751 // Calculate theoretical max. size of Threads to guard gainst artifical 3752 // out-of-memory situations, where all available address-space has been 3753 // reserved by thread stacks. 3754 assert(actual_reserve_size != 0, "Must have a stack"); 3755 3756 // Calculate the thread limit when we should start doing Virtual Memory 3757 // banging. Currently when the threads will have used all but 200Mb of space. 3758 // 3759 // TODO: consider performing a similar calculation for commit size instead 3760 // as reserve size, since on a 64-bit platform we'll run into that more 3761 // often than running out of virtual memory space. We can use the 3762 // lower value of the two calculations as the os_thread_limit. 3763 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); 3764 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); 3765 3766 // at exit methods are called in the reverse order of their registration. 3767 // there is no limit to the number of functions registered. atexit does 3768 // not set errno. 3769 3770 if (PerfAllowAtExitRegistration) { 3771 // only register atexit functions if PerfAllowAtExitRegistration is set. 3772 // atexit functions can be delayed until process exit time, which 3773 // can be problematic for embedded VM situations. Embedded VMs should 3774 // call DestroyJavaVM() to assure that VM resources are released. 3775 3776 // note: perfMemory_exit_helper atexit function may be removed in 3777 // the future if the appropriate cleanup code can be added to the 3778 // VM_Exit VMOperation's doit method. 3779 if (atexit(perfMemory_exit_helper) != 0) { 3780 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); 3781 } 3782 } 3783 3784#ifndef _WIN64 3785 // Print something if NX is enabled (win32 on AMD64) 3786 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); 3787#endif 3788 3789 // initialize thread priority policy 3790 prio_init(); 3791 3792 if (UseNUMA && !ForceNUMA) { 3793 UseNUMA = false; // We don't fully support this yet 3794 } 3795 3796 if (UseNUMAInterleaving) { 3797 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag 3798 bool success = numa_interleaving_init(); 3799 if (!success) UseNUMAInterleaving = false; 3800 } 3801 3802 return JNI_OK; 3803} 3804 3805void os::init_3(void) { 3806 return; 3807} 3808 3809// Mark the polling page as unreadable 3810void os::make_polling_page_unreadable(void) { 3811 DWORD old_status; 3812 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) 3813 fatal("Could not disable polling page"); 3814}; 3815 3816// Mark the polling page as readable 3817void os::make_polling_page_readable(void) { 3818 DWORD old_status; 3819 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) 3820 fatal("Could not enable polling page"); 3821}; 3822 3823 3824int os::stat(const char *path, struct stat *sbuf) { 3825 char pathbuf[MAX_PATH]; 3826 if (strlen(path) > MAX_PATH - 1) { 3827 errno = ENAMETOOLONG; 3828 return -1; 3829 } 3830 os::native_path(strcpy(pathbuf, path)); 3831 int ret = ::stat(pathbuf, sbuf); 3832 if (sbuf != NULL && UseUTCFileTimestamp) { 3833 // Fix for 6539723. st_mtime returned from stat() is dependent on 3834 // the system timezone and so can return different values for the 3835 // same file if/when daylight savings time changes. This adjustment 3836 // makes sure the same timestamp is returned regardless of the TZ. 3837 // 3838 // See: 3839 // http://msdn.microsoft.com/library/ 3840 // default.asp?url=/library/en-us/sysinfo/base/ 3841 // time_zone_information_str.asp 3842 // and 3843 // http://msdn.microsoft.com/library/default.asp?url= 3844 // /library/en-us/sysinfo/base/settimezoneinformation.asp 3845 // 3846 // NOTE: there is a insidious bug here: If the timezone is changed 3847 // after the call to stat() but before 'GetTimeZoneInformation()', then 3848 // the adjustment we do here will be wrong and we'll return the wrong 3849 // value (which will likely end up creating an invalid class data 3850 // archive). Absent a better API for this, or some time zone locking 3851 // mechanism, we'll have to live with this risk. 3852 TIME_ZONE_INFORMATION tz; 3853 DWORD tzid = GetTimeZoneInformation(&tz); 3854 int daylightBias = 3855 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; 3856 sbuf->st_mtime += (tz.Bias + daylightBias) * 60; 3857 } 3858 return ret; 3859} 3860 3861 3862#define FT2INT64(ft) \ 3863 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) 3864 3865 3866// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 3867// are used by JVM M&M and JVMTI to get user+sys or user CPU time 3868// of a thread. 3869// 3870// current_thread_cpu_time() and thread_cpu_time(Thread*) returns 3871// the fast estimate available on the platform. 3872 3873// current_thread_cpu_time() is not optimized for Windows yet 3874jlong os::current_thread_cpu_time() { 3875 // return user + sys since the cost is the same 3876 return os::thread_cpu_time(Thread::current(), true /* user+sys */); 3877} 3878 3879jlong os::thread_cpu_time(Thread* thread) { 3880 // consistent with what current_thread_cpu_time() returns. 3881 return os::thread_cpu_time(thread, true /* user+sys */); 3882} 3883 3884jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 3885 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 3886} 3887 3888jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { 3889 // This code is copy from clasic VM -> hpi::sysThreadCPUTime 3890 // If this function changes, os::is_thread_cpu_time_supported() should too 3891 if (os::win32::is_nt()) { 3892 FILETIME CreationTime; 3893 FILETIME ExitTime; 3894 FILETIME KernelTime; 3895 FILETIME UserTime; 3896 3897 if ( GetThreadTimes(thread->osthread()->thread_handle(), 3898 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3899 return -1; 3900 else 3901 if (user_sys_cpu_time) { 3902 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; 3903 } else { 3904 return FT2INT64(UserTime) * 100; 3905 } 3906 } else { 3907 return (jlong) timeGetTime() * 1000000; 3908 } 3909} 3910 3911void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3912 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3913 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3914 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3915 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3916} 3917 3918void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3919 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3920 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3921 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3922 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3923} 3924 3925bool os::is_thread_cpu_time_supported() { 3926 // see os::thread_cpu_time 3927 if (os::win32::is_nt()) { 3928 FILETIME CreationTime; 3929 FILETIME ExitTime; 3930 FILETIME KernelTime; 3931 FILETIME UserTime; 3932 3933 if ( GetThreadTimes(GetCurrentThread(), 3934 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3935 return false; 3936 else 3937 return true; 3938 } else { 3939 return false; 3940 } 3941} 3942 3943// Windows does't provide a loadavg primitive so this is stubbed out for now. 3944// It does have primitives (PDH API) to get CPU usage and run queue length. 3945// "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" 3946// If we wanted to implement loadavg on Windows, we have a few options: 3947// 3948// a) Query CPU usage and run queue length and "fake" an answer by 3949// returning the CPU usage if it's under 100%, and the run queue 3950// length otherwise. It turns out that querying is pretty slow 3951// on Windows, on the order of 200 microseconds on a fast machine. 3952// Note that on the Windows the CPU usage value is the % usage 3953// since the last time the API was called (and the first call 3954// returns 100%), so we'd have to deal with that as well. 3955// 3956// b) Sample the "fake" answer using a sampling thread and store 3957// the answer in a global variable. The call to loadavg would 3958// just return the value of the global, avoiding the slow query. 3959// 3960// c) Sample a better answer using exponential decay to smooth the 3961// value. This is basically the algorithm used by UNIX kernels. 3962// 3963// Note that sampling thread starvation could affect both (b) and (c). 3964int os::loadavg(double loadavg[], int nelem) { 3965 return -1; 3966} 3967 3968 3969// DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() 3970bool os::dont_yield() { 3971 return DontYieldALot; 3972} 3973 3974// This method is a slightly reworked copy of JDK's sysOpen 3975// from src/windows/hpi/src/sys_api_md.c 3976 3977int os::open(const char *path, int oflag, int mode) { 3978 char pathbuf[MAX_PATH]; 3979 3980 if (strlen(path) > MAX_PATH - 1) { 3981 errno = ENAMETOOLONG; 3982 return -1; 3983 } 3984 os::native_path(strcpy(pathbuf, path)); 3985 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode); 3986} 3987 3988// Is a (classpath) directory empty? 3989bool os::dir_is_empty(const char* path) { 3990 WIN32_FIND_DATA fd; 3991 HANDLE f = FindFirstFile(path, &fd); 3992 if (f == INVALID_HANDLE_VALUE) { 3993 return true; 3994 } 3995 FindClose(f); 3996 return false; 3997} 3998 3999// create binary file, rewriting existing file if required 4000int os::create_binary_file(const char* path, bool rewrite_existing) { 4001 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; 4002 if (!rewrite_existing) { 4003 oflags |= _O_EXCL; 4004 } 4005 return ::open(path, oflags, _S_IREAD | _S_IWRITE); 4006} 4007 4008// return current position of file pointer 4009jlong os::current_file_offset(int fd) { 4010 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); 4011} 4012 4013// move file pointer to the specified offset 4014jlong os::seek_to_file_offset(int fd, jlong offset) { 4015 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); 4016} 4017 4018 4019jlong os::lseek(int fd, jlong offset, int whence) { 4020 return (jlong) ::_lseeki64(fd, offset, whence); 4021} 4022 4023// This method is a slightly reworked copy of JDK's sysNativePath 4024// from src/windows/hpi/src/path_md.c 4025 4026/* Convert a pathname to native format. On win32, this involves forcing all 4027 separators to be '\\' rather than '/' (both are legal inputs, but Win95 4028 sometimes rejects '/') and removing redundant separators. The input path is 4029 assumed to have been converted into the character encoding used by the local 4030 system. Because this might be a double-byte encoding, care is taken to 4031 treat double-byte lead characters correctly. 4032 4033 This procedure modifies the given path in place, as the result is never 4034 longer than the original. There is no error return; this operation always 4035 succeeds. */ 4036char * os::native_path(char *path) { 4037 char *src = path, *dst = path, *end = path; 4038 char *colon = NULL; /* If a drive specifier is found, this will 4039 point to the colon following the drive 4040 letter */ 4041 4042 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */ 4043 assert(((!::IsDBCSLeadByte('/')) 4044 && (!::IsDBCSLeadByte('\\')) 4045 && (!::IsDBCSLeadByte(':'))), 4046 "Illegal lead byte"); 4047 4048 /* Check for leading separators */ 4049#define isfilesep(c) ((c) == '/' || (c) == '\\') 4050 while (isfilesep(*src)) { 4051 src++; 4052 } 4053 4054 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') { 4055 /* Remove leading separators if followed by drive specifier. This 4056 hack is necessary to support file URLs containing drive 4057 specifiers (e.g., "file://c:/path"). As a side effect, 4058 "/c:/path" can be used as an alternative to "c:/path". */ 4059 *dst++ = *src++; 4060 colon = dst; 4061 *dst++ = ':'; 4062 src++; 4063 } else { 4064 src = path; 4065 if (isfilesep(src[0]) && isfilesep(src[1])) { 4066 /* UNC pathname: Retain first separator; leave src pointed at 4067 second separator so that further separators will be collapsed 4068 into the second separator. The result will be a pathname 4069 beginning with "\\\\" followed (most likely) by a host name. */ 4070 src = dst = path + 1; 4071 path[0] = '\\'; /* Force first separator to '\\' */ 4072 } 4073 } 4074 4075 end = dst; 4076 4077 /* Remove redundant separators from remainder of path, forcing all 4078 separators to be '\\' rather than '/'. Also, single byte space 4079 characters are removed from the end of the path because those 4080 are not legal ending characters on this operating system. 4081 */ 4082 while (*src != '\0') { 4083 if (isfilesep(*src)) { 4084 *dst++ = '\\'; src++; 4085 while (isfilesep(*src)) src++; 4086 if (*src == '\0') { 4087 /* Check for trailing separator */ 4088 end = dst; 4089 if (colon == dst - 2) break; /* "z:\\" */ 4090 if (dst == path + 1) break; /* "\\" */ 4091 if (dst == path + 2 && isfilesep(path[0])) { 4092 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the 4093 beginning of a UNC pathname. Even though it is not, by 4094 itself, a valid UNC pathname, we leave it as is in order 4095 to be consistent with the path canonicalizer as well 4096 as the win32 APIs, which treat this case as an invalid 4097 UNC pathname rather than as an alias for the root 4098 directory of the current drive. */ 4099 break; 4100 } 4101 end = --dst; /* Path does not denote a root directory, so 4102 remove trailing separator */ 4103 break; 4104 } 4105 end = dst; 4106 } else { 4107 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */ 4108 *dst++ = *src++; 4109 if (*src) *dst++ = *src++; 4110 end = dst; 4111 } else { /* Copy a single-byte character */ 4112 char c = *src++; 4113 *dst++ = c; 4114 /* Space is not a legal ending character */ 4115 if (c != ' ') end = dst; 4116 } 4117 } 4118 } 4119 4120 *end = '\0'; 4121 4122 /* For "z:", add "." to work around a bug in the C runtime library */ 4123 if (colon == dst - 1) { 4124 path[2] = '.'; 4125 path[3] = '\0'; 4126 } 4127 4128 #ifdef DEBUG 4129 jio_fprintf(stderr, "sysNativePath: %s\n", path); 4130 #endif DEBUG 4131 return path; 4132} 4133 4134// This code is a copy of JDK's sysSetLength 4135// from src/windows/hpi/src/sys_api_md.c 4136 4137int os::ftruncate(int fd, jlong length) { 4138 HANDLE h = (HANDLE)::_get_osfhandle(fd); 4139 long high = (long)(length >> 32); 4140 DWORD ret; 4141 4142 if (h == (HANDLE)(-1)) { 4143 return -1; 4144 } 4145 4146 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN); 4147 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) { 4148 return -1; 4149 } 4150 4151 if (::SetEndOfFile(h) == FALSE) { 4152 return -1; 4153 } 4154 4155 return 0; 4156} 4157 4158 4159// This code is a copy of JDK's sysSync 4160// from src/windows/hpi/src/sys_api_md.c 4161// except for the legacy workaround for a bug in Win 98 4162 4163int os::fsync(int fd) { 4164 HANDLE handle = (HANDLE)::_get_osfhandle(fd); 4165 4166 if ( (!::FlushFileBuffers(handle)) && 4167 (GetLastError() != ERROR_ACCESS_DENIED) ) { 4168 /* from winerror.h */ 4169 return -1; 4170 } 4171 return 0; 4172} 4173 4174static int nonSeekAvailable(int, long *); 4175static int stdinAvailable(int, long *); 4176 4177#define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR) 4178#define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO) 4179 4180// This code is a copy of JDK's sysAvailable 4181// from src/windows/hpi/src/sys_api_md.c 4182 4183int os::available(int fd, jlong *bytes) { 4184 jlong cur, end; 4185 struct _stati64 stbuf64; 4186 4187 if (::_fstati64(fd, &stbuf64) >= 0) { 4188 int mode = stbuf64.st_mode; 4189 if (S_ISCHR(mode) || S_ISFIFO(mode)) { 4190 int ret; 4191 long lpbytes; 4192 if (fd == 0) { 4193 ret = stdinAvailable(fd, &lpbytes); 4194 } else { 4195 ret = nonSeekAvailable(fd, &lpbytes); 4196 } 4197 (*bytes) = (jlong)(lpbytes); 4198 return ret; 4199 } 4200 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) { 4201 return FALSE; 4202 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) { 4203 return FALSE; 4204 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) { 4205 return FALSE; 4206 } 4207 *bytes = end - cur; 4208 return TRUE; 4209 } else { 4210 return FALSE; 4211 } 4212} 4213 4214// This code is a copy of JDK's nonSeekAvailable 4215// from src/windows/hpi/src/sys_api_md.c 4216 4217static int nonSeekAvailable(int fd, long *pbytes) { 4218 /* This is used for available on non-seekable devices 4219 * (like both named and anonymous pipes, such as pipes 4220 * connected to an exec'd process). 4221 * Standard Input is a special case. 4222 * 4223 */ 4224 HANDLE han; 4225 4226 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) { 4227 return FALSE; 4228 } 4229 4230 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) { 4231 /* PeekNamedPipe fails when at EOF. In that case we 4232 * simply make *pbytes = 0 which is consistent with the 4233 * behavior we get on Solaris when an fd is at EOF. 4234 * The only alternative is to raise an Exception, 4235 * which isn't really warranted. 4236 */ 4237 if (::GetLastError() != ERROR_BROKEN_PIPE) { 4238 return FALSE; 4239 } 4240 *pbytes = 0; 4241 } 4242 return TRUE; 4243} 4244 4245#define MAX_INPUT_EVENTS 2000 4246 4247// This code is a copy of JDK's stdinAvailable 4248// from src/windows/hpi/src/sys_api_md.c 4249 4250static int stdinAvailable(int fd, long *pbytes) { 4251 HANDLE han; 4252 DWORD numEventsRead = 0; /* Number of events read from buffer */ 4253 DWORD numEvents = 0; /* Number of events in buffer */ 4254 DWORD i = 0; /* Loop index */ 4255 DWORD curLength = 0; /* Position marker */ 4256 DWORD actualLength = 0; /* Number of bytes readable */ 4257 BOOL error = FALSE; /* Error holder */ 4258 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */ 4259 4260 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) { 4261 return FALSE; 4262 } 4263 4264 /* Construct an array of input records in the console buffer */ 4265 error = ::GetNumberOfConsoleInputEvents(han, &numEvents); 4266 if (error == 0) { 4267 return nonSeekAvailable(fd, pbytes); 4268 } 4269 4270 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */ 4271 if (numEvents > MAX_INPUT_EVENTS) { 4272 numEvents = MAX_INPUT_EVENTS; 4273 } 4274 4275 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD), mtInternal); 4276 if (lpBuffer == NULL) { 4277 return FALSE; 4278 } 4279 4280 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead); 4281 if (error == 0) { 4282 os::free(lpBuffer, mtInternal); 4283 return FALSE; 4284 } 4285 4286 /* Examine input records for the number of bytes available */ 4287 for(i=0; i<numEvents; i++) { 4288 if (lpBuffer[i].EventType == KEY_EVENT) { 4289 4290 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *) 4291 &(lpBuffer[i].Event); 4292 if (keyRecord->bKeyDown == TRUE) { 4293 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar); 4294 curLength++; 4295 if (*keyPressed == '\r') { 4296 actualLength = curLength; 4297 } 4298 } 4299 } 4300 } 4301 4302 if(lpBuffer != NULL) { 4303 os::free(lpBuffer, mtInternal); 4304 } 4305 4306 *pbytes = (long) actualLength; 4307 return TRUE; 4308} 4309 4310// Map a block of memory. 4311char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4312 char *addr, size_t bytes, bool read_only, 4313 bool allow_exec) { 4314 HANDLE hFile; 4315 char* base; 4316 4317 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, 4318 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 4319 if (hFile == NULL) { 4320 if (PrintMiscellaneous && Verbose) { 4321 DWORD err = GetLastError(); 4322 tty->print_cr("CreateFile() failed: GetLastError->%ld.", err); 4323 } 4324 return NULL; 4325 } 4326 4327 if (allow_exec) { 4328 // CreateFileMapping/MapViewOfFileEx can't map executable memory 4329 // unless it comes from a PE image (which the shared archive is not.) 4330 // Even VirtualProtect refuses to give execute access to mapped memory 4331 // that was not previously executable. 4332 // 4333 // Instead, stick the executable region in anonymous memory. Yuck. 4334 // Penalty is that ~4 pages will not be shareable - in the future 4335 // we might consider DLLizing the shared archive with a proper PE 4336 // header so that mapping executable + sharing is possible. 4337 4338 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, 4339 PAGE_READWRITE); 4340 if (base == NULL) { 4341 if (PrintMiscellaneous && Verbose) { 4342 DWORD err = GetLastError(); 4343 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); 4344 } 4345 CloseHandle(hFile); 4346 return NULL; 4347 } 4348 4349 DWORD bytes_read; 4350 OVERLAPPED overlapped; 4351 overlapped.Offset = (DWORD)file_offset; 4352 overlapped.OffsetHigh = 0; 4353 overlapped.hEvent = NULL; 4354 // ReadFile guarantees that if the return value is true, the requested 4355 // number of bytes were read before returning. 4356 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; 4357 if (!res) { 4358 if (PrintMiscellaneous && Verbose) { 4359 DWORD err = GetLastError(); 4360 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); 4361 } 4362 release_memory(base, bytes); 4363 CloseHandle(hFile); 4364 return NULL; 4365 } 4366 } else { 4367 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, 4368 NULL /*file_name*/); 4369 if (hMap == NULL) { 4370 if (PrintMiscellaneous && Verbose) { 4371 DWORD err = GetLastError(); 4372 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.", err); 4373 } 4374 CloseHandle(hFile); 4375 return NULL; 4376 } 4377 4378 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; 4379 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, 4380 (DWORD)bytes, addr); 4381 if (base == NULL) { 4382 if (PrintMiscellaneous && Verbose) { 4383 DWORD err = GetLastError(); 4384 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); 4385 } 4386 CloseHandle(hMap); 4387 CloseHandle(hFile); 4388 return NULL; 4389 } 4390 4391 if (CloseHandle(hMap) == 0) { 4392 if (PrintMiscellaneous && Verbose) { 4393 DWORD err = GetLastError(); 4394 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); 4395 } 4396 CloseHandle(hFile); 4397 return base; 4398 } 4399 } 4400 4401 if (allow_exec) { 4402 DWORD old_protect; 4403 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; 4404 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; 4405 4406 if (!res) { 4407 if (PrintMiscellaneous && Verbose) { 4408 DWORD err = GetLastError(); 4409 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); 4410 } 4411 // Don't consider this a hard error, on IA32 even if the 4412 // VirtualProtect fails, we should still be able to execute 4413 CloseHandle(hFile); 4414 return base; 4415 } 4416 } 4417 4418 if (CloseHandle(hFile) == 0) { 4419 if (PrintMiscellaneous && Verbose) { 4420 DWORD err = GetLastError(); 4421 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); 4422 } 4423 return base; 4424 } 4425 4426 return base; 4427} 4428 4429 4430// Remap a block of memory. 4431char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4432 char *addr, size_t bytes, bool read_only, 4433 bool allow_exec) { 4434 // This OS does not allow existing memory maps to be remapped so we 4435 // have to unmap the memory before we remap it. 4436 if (!os::unmap_memory(addr, bytes)) { 4437 return NULL; 4438 } 4439 4440 // There is a very small theoretical window between the unmap_memory() 4441 // call above and the map_memory() call below where a thread in native 4442 // code may be able to access an address that is no longer mapped. 4443 4444 return os::map_memory(fd, file_name, file_offset, addr, bytes, 4445 read_only, allow_exec); 4446} 4447 4448 4449// Unmap a block of memory. 4450// Returns true=success, otherwise false. 4451 4452bool os::pd_unmap_memory(char* addr, size_t bytes) { 4453 BOOL result = UnmapViewOfFile(addr); 4454 if (result == 0) { 4455 if (PrintMiscellaneous && Verbose) { 4456 DWORD err = GetLastError(); 4457 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); 4458 } 4459 return false; 4460 } 4461 return true; 4462} 4463 4464void os::pause() { 4465 char filename[MAX_PATH]; 4466 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4467 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4468 } else { 4469 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4470 } 4471 4472 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4473 if (fd != -1) { 4474 struct stat buf; 4475 ::close(fd); 4476 while (::stat(filename, &buf) == 0) { 4477 Sleep(100); 4478 } 4479 } else { 4480 jio_fprintf(stderr, 4481 "Could not open pause file '%s', continuing immediately.\n", filename); 4482 } 4483} 4484 4485// An Event wraps a win32 "CreateEvent" kernel handle. 4486// 4487// We have a number of choices regarding "CreateEvent" win32 handle leakage: 4488// 4489// 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle 4490// field, and call CloseHandle() on the win32 event handle. Unpark() would 4491// need to be modified to tolerate finding a NULL (invalid) win32 event handle. 4492// In addition, an unpark() operation might fetch the handle field, but the 4493// event could recycle between the fetch and the SetEvent() operation. 4494// SetEvent() would either fail because the handle was invalid, or inadvertently work, 4495// as the win32 handle value had been recycled. In an ideal world calling SetEvent() 4496// on an stale but recycled handle would be harmless, but in practice this might 4497// confuse other non-Sun code, so it's not a viable approach. 4498// 4499// 2: Once a win32 event handle is associated with an Event, it remains associated 4500// with the Event. The event handle is never closed. This could be construed 4501// as handle leakage, but only up to the maximum # of threads that have been extant 4502// at any one time. This shouldn't be an issue, as windows platforms typically 4503// permit a process to have hundreds of thousands of open handles. 4504// 4505// 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList 4506// and release unused handles. 4507// 4508// 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. 4509// It's not clear, however, that we wouldn't be trading one type of leak for another. 4510// 4511// 5. Use an RCU-like mechanism (Read-Copy Update). 4512// Or perhaps something similar to Maged Michael's "Hazard pointers". 4513// 4514// We use (2). 4515// 4516// TODO-FIXME: 4517// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. 4518// 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks 4519// to recover from (or at least detect) the dreaded Windows 841176 bug. 4520// 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent 4521// into a single win32 CreateEvent() handle. 4522// 4523// _Event transitions in park() 4524// -1 => -1 : illegal 4525// 1 => 0 : pass - return immediately 4526// 0 => -1 : block 4527// 4528// _Event serves as a restricted-range semaphore : 4529// -1 : thread is blocked 4530// 0 : neutral - thread is running or ready 4531// 1 : signaled - thread is running or ready 4532// 4533// Another possible encoding of _Event would be 4534// with explicit "PARKED" and "SIGNALED" bits. 4535 4536int os::PlatformEvent::park (jlong Millis) { 4537 guarantee (_ParkHandle != NULL , "Invariant") ; 4538 guarantee (Millis > 0 , "Invariant") ; 4539 int v ; 4540 4541 // CONSIDER: defer assigning a CreateEvent() handle to the Event until 4542 // the initial park() operation. 4543 4544 for (;;) { 4545 v = _Event ; 4546 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4547 } 4548 guarantee ((v == 0) || (v == 1), "invariant") ; 4549 if (v != 0) return OS_OK ; 4550 4551 // Do this the hard way by blocking ... 4552 // TODO: consider a brief spin here, gated on the success of recent 4553 // spin attempts by this thread. 4554 // 4555 // We decompose long timeouts into series of shorter timed waits. 4556 // Evidently large timo values passed in WaitForSingleObject() are problematic on some 4557 // versions of Windows. See EventWait() for details. This may be superstition. Or not. 4558 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time 4559 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from 4560 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend 4561 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == 4562 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate 4563 // for the already waited time. This policy does not admit any new outcomes. 4564 // In the future, however, we might want to track the accumulated wait time and 4565 // adjust Millis accordingly if we encounter a spurious wakeup. 4566 4567 const int MAXTIMEOUT = 0x10000000 ; 4568 DWORD rv = WAIT_TIMEOUT ; 4569 while (_Event < 0 && Millis > 0) { 4570 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) 4571 if (Millis > MAXTIMEOUT) { 4572 prd = MAXTIMEOUT ; 4573 } 4574 rv = ::WaitForSingleObject (_ParkHandle, prd) ; 4575 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; 4576 if (rv == WAIT_TIMEOUT) { 4577 Millis -= prd ; 4578 } 4579 } 4580 v = _Event ; 4581 _Event = 0 ; 4582 // see comment at end of os::PlatformEvent::park() below: 4583 OrderAccess::fence() ; 4584 // If we encounter a nearly simultanous timeout expiry and unpark() 4585 // we return OS_OK indicating we awoke via unpark(). 4586 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. 4587 return (v >= 0) ? OS_OK : OS_TIMEOUT ; 4588} 4589 4590void os::PlatformEvent::park () { 4591 guarantee (_ParkHandle != NULL, "Invariant") ; 4592 // Invariant: Only the thread associated with the Event/PlatformEvent 4593 // may call park(). 4594 int v ; 4595 for (;;) { 4596 v = _Event ; 4597 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4598 } 4599 guarantee ((v == 0) || (v == 1), "invariant") ; 4600 if (v != 0) return ; 4601 4602 // Do this the hard way by blocking ... 4603 // TODO: consider a brief spin here, gated on the success of recent 4604 // spin attempts by this thread. 4605 while (_Event < 0) { 4606 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; 4607 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; 4608 } 4609 4610 // Usually we'll find _Event == 0 at this point, but as 4611 // an optional optimization we clear it, just in case can 4612 // multiple unpark() operations drove _Event up to 1. 4613 _Event = 0 ; 4614 OrderAccess::fence() ; 4615 guarantee (_Event >= 0, "invariant") ; 4616} 4617 4618void os::PlatformEvent::unpark() { 4619 guarantee (_ParkHandle != NULL, "Invariant") ; 4620 4621 // Transitions for _Event: 4622 // 0 :=> 1 4623 // 1 :=> 1 4624 // -1 :=> either 0 or 1; must signal target thread 4625 // That is, we can safely transition _Event from -1 to either 4626 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back 4627 // unpark() calls. 4628 // See also: "Semaphores in Plan 9" by Mullender & Cox 4629 // 4630 // Note: Forcing a transition from "-1" to "1" on an unpark() means 4631 // that it will take two back-to-back park() calls for the owning 4632 // thread to block. This has the benefit of forcing a spurious return 4633 // from the first park() call after an unpark() call which will help 4634 // shake out uses of park() and unpark() without condition variables. 4635 4636 if (Atomic::xchg(1, &_Event) >= 0) return; 4637 4638 ::SetEvent(_ParkHandle); 4639} 4640 4641 4642// JSR166 4643// ------------------------------------------------------- 4644 4645/* 4646 * The Windows implementation of Park is very straightforward: Basic 4647 * operations on Win32 Events turn out to have the right semantics to 4648 * use them directly. We opportunistically resuse the event inherited 4649 * from Monitor. 4650 */ 4651 4652 4653void Parker::park(bool isAbsolute, jlong time) { 4654 guarantee (_ParkEvent != NULL, "invariant") ; 4655 // First, demultiplex/decode time arguments 4656 if (time < 0) { // don't wait 4657 return; 4658 } 4659 else if (time == 0 && !isAbsolute) { 4660 time = INFINITE; 4661 } 4662 else if (isAbsolute) { 4663 time -= os::javaTimeMillis(); // convert to relative time 4664 if (time <= 0) // already elapsed 4665 return; 4666 } 4667 else { // relative 4668 time /= 1000000; // Must coarsen from nanos to millis 4669 if (time == 0) // Wait for the minimal time unit if zero 4670 time = 1; 4671 } 4672 4673 JavaThread* thread = (JavaThread*)(Thread::current()); 4674 assert(thread->is_Java_thread(), "Must be JavaThread"); 4675 JavaThread *jt = (JavaThread *)thread; 4676 4677 // Don't wait if interrupted or already triggered 4678 if (Thread::is_interrupted(thread, false) || 4679 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { 4680 ResetEvent(_ParkEvent); 4681 return; 4682 } 4683 else { 4684 ThreadBlockInVM tbivm(jt); 4685 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 4686 jt->set_suspend_equivalent(); 4687 4688 WaitForSingleObject(_ParkEvent, time); 4689 ResetEvent(_ParkEvent); 4690 4691 // If externally suspended while waiting, re-suspend 4692 if (jt->handle_special_suspend_equivalent_condition()) { 4693 jt->java_suspend_self(); 4694 } 4695 } 4696} 4697 4698void Parker::unpark() { 4699 guarantee (_ParkEvent != NULL, "invariant") ; 4700 SetEvent(_ParkEvent); 4701} 4702 4703// Run the specified command in a separate process. Return its exit value, 4704// or -1 on failure (e.g. can't create a new process). 4705int os::fork_and_exec(char* cmd) { 4706 STARTUPINFO si; 4707 PROCESS_INFORMATION pi; 4708 4709 memset(&si, 0, sizeof(si)); 4710 si.cb = sizeof(si); 4711 memset(&pi, 0, sizeof(pi)); 4712 BOOL rslt = CreateProcess(NULL, // executable name - use command line 4713 cmd, // command line 4714 NULL, // process security attribute 4715 NULL, // thread security attribute 4716 TRUE, // inherits system handles 4717 0, // no creation flags 4718 NULL, // use parent's environment block 4719 NULL, // use parent's starting directory 4720 &si, // (in) startup information 4721 &pi); // (out) process information 4722 4723 if (rslt) { 4724 // Wait until child process exits. 4725 WaitForSingleObject(pi.hProcess, INFINITE); 4726 4727 DWORD exit_code; 4728 GetExitCodeProcess(pi.hProcess, &exit_code); 4729 4730 // Close process and thread handles. 4731 CloseHandle(pi.hProcess); 4732 CloseHandle(pi.hThread); 4733 4734 return (int)exit_code; 4735 } else { 4736 return -1; 4737 } 4738} 4739 4740//-------------------------------------------------------------------------------------------------- 4741// Non-product code 4742 4743static int mallocDebugIntervalCounter = 0; 4744static int mallocDebugCounter = 0; 4745bool os::check_heap(bool force) { 4746 if (++mallocDebugCounter < MallocVerifyStart && !force) return true; 4747 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { 4748 // Note: HeapValidate executes two hardware breakpoints when it finds something 4749 // wrong; at these points, eax contains the address of the offending block (I think). 4750 // To get to the exlicit error message(s) below, just continue twice. 4751 HANDLE heap = GetProcessHeap(); 4752 { HeapLock(heap); 4753 PROCESS_HEAP_ENTRY phe; 4754 phe.lpData = NULL; 4755 while (HeapWalk(heap, &phe) != 0) { 4756 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && 4757 !HeapValidate(heap, 0, phe.lpData)) { 4758 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); 4759 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); 4760 fatal("corrupted C heap"); 4761 } 4762 } 4763 DWORD err = GetLastError(); 4764 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { 4765 fatal(err_msg("heap walk aborted with error %d", err)); 4766 } 4767 HeapUnlock(heap); 4768 } 4769 mallocDebugIntervalCounter = 0; 4770 } 4771 return true; 4772} 4773 4774 4775bool os::find(address addr, outputStream* st) { 4776 // Nothing yet 4777 return false; 4778} 4779 4780LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { 4781 DWORD exception_code = e->ExceptionRecord->ExceptionCode; 4782 4783 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 4784 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); 4785 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; 4786 address addr = (address) exceptionRecord->ExceptionInformation[1]; 4787 4788 if (os::is_memory_serialize_page(thread, addr)) 4789 return EXCEPTION_CONTINUE_EXECUTION; 4790 } 4791 4792 return EXCEPTION_CONTINUE_SEARCH; 4793} 4794 4795// We don't build a headless jre for Windows 4796bool os::is_headless_jre() { return false; } 4797 4798 4799typedef CRITICAL_SECTION mutex_t; 4800#define mutexInit(m) InitializeCriticalSection(m) 4801#define mutexDestroy(m) DeleteCriticalSection(m) 4802#define mutexLock(m) EnterCriticalSection(m) 4803#define mutexUnlock(m) LeaveCriticalSection(m) 4804 4805static bool sock_initialized = FALSE; 4806static mutex_t sockFnTableMutex; 4807 4808static void initSock() { 4809 WSADATA wsadata; 4810 4811 if (!os::WinSock2Dll::WinSock2Available()) { 4812 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n", 4813 ::GetLastError()); 4814 return; 4815 } 4816 if (sock_initialized == TRUE) return; 4817 4818 ::mutexInit(&sockFnTableMutex); 4819 ::mutexLock(&sockFnTableMutex); 4820 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) { 4821 jio_fprintf(stderr, "Could not initialize Winsock\n"); 4822 } 4823 sock_initialized = TRUE; 4824 ::mutexUnlock(&sockFnTableMutex); 4825} 4826 4827struct hostent* os::get_host_by_name(char* name) { 4828 if (!sock_initialized) { 4829 initSock(); 4830 } 4831 if (!os::WinSock2Dll::WinSock2Available()) { 4832 return NULL; 4833 } 4834 return (struct hostent*)os::WinSock2Dll::gethostbyname(name); 4835} 4836 4837int os::socket_close(int fd) { 4838 return ::closesocket(fd); 4839} 4840 4841int os::socket_available(int fd, jint *pbytes) { 4842 int ret = ::ioctlsocket(fd, FIONREAD, (u_long*)pbytes); 4843 return (ret < 0) ? 0 : 1; 4844} 4845 4846int os::socket(int domain, int type, int protocol) { 4847 return ::socket(domain, type, protocol); 4848} 4849 4850int os::listen(int fd, int count) { 4851 return ::listen(fd, count); 4852} 4853 4854int os::connect(int fd, struct sockaddr* him, socklen_t len) { 4855 return ::connect(fd, him, len); 4856} 4857 4858int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 4859 return ::accept(fd, him, len); 4860} 4861 4862int os::sendto(int fd, char* buf, size_t len, uint flags, 4863 struct sockaddr* to, socklen_t tolen) { 4864 4865 return ::sendto(fd, buf, (int)len, flags, to, tolen); 4866} 4867 4868int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags, 4869 sockaddr* from, socklen_t* fromlen) { 4870 4871 return ::recvfrom(fd, buf, (int)nBytes, flags, from, fromlen); 4872} 4873 4874int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 4875 return ::recv(fd, buf, (int)nBytes, flags); 4876} 4877 4878int os::send(int fd, char* buf, size_t nBytes, uint flags) { 4879 return ::send(fd, buf, (int)nBytes, flags); 4880} 4881 4882int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 4883 return ::send(fd, buf, (int)nBytes, flags); 4884} 4885 4886int os::timeout(int fd, long timeout) { 4887 fd_set tbl; 4888 struct timeval t; 4889 4890 t.tv_sec = timeout / 1000; 4891 t.tv_usec = (timeout % 1000) * 1000; 4892 4893 tbl.fd_count = 1; 4894 tbl.fd_array[0] = fd; 4895 4896 return ::select(1, &tbl, 0, 0, &t); 4897} 4898 4899int os::get_host_name(char* name, int namelen) { 4900 return ::gethostname(name, namelen); 4901} 4902 4903int os::socket_shutdown(int fd, int howto) { 4904 return ::shutdown(fd, howto); 4905} 4906 4907int os::bind(int fd, struct sockaddr* him, socklen_t len) { 4908 return ::bind(fd, him, len); 4909} 4910 4911int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 4912 return ::getsockname(fd, him, len); 4913} 4914 4915int os::get_sock_opt(int fd, int level, int optname, 4916 char* optval, socklen_t* optlen) { 4917 return ::getsockopt(fd, level, optname, optval, optlen); 4918} 4919 4920int os::set_sock_opt(int fd, int level, int optname, 4921 const char* optval, socklen_t optlen) { 4922 return ::setsockopt(fd, level, optname, optval, optlen); 4923} 4924 4925 4926// Kernel32 API 4927typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void); 4928typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 4929typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG); 4930typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG); 4931typedef USHORT (WINAPI* RtlCaptureStackBackTrace_Fn)(ULONG, ULONG, PVOID*, PULONG); 4932 4933GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL; 4934VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL; 4935GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL; 4936GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL; 4937RtlCaptureStackBackTrace_Fn os::Kernel32Dll::_RtlCaptureStackBackTrace = NULL; 4938 4939 4940BOOL os::Kernel32Dll::initialized = FALSE; 4941SIZE_T os::Kernel32Dll::GetLargePageMinimum() { 4942 assert(initialized && _GetLargePageMinimum != NULL, 4943 "GetLargePageMinimumAvailable() not yet called"); 4944 return _GetLargePageMinimum(); 4945} 4946 4947BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() { 4948 if (!initialized) { 4949 initialize(); 4950 } 4951 return _GetLargePageMinimum != NULL; 4952} 4953 4954BOOL os::Kernel32Dll::NumaCallsAvailable() { 4955 if (!initialized) { 4956 initialize(); 4957 } 4958 return _VirtualAllocExNuma != NULL; 4959} 4960 4961LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) { 4962 assert(initialized && _VirtualAllocExNuma != NULL, 4963 "NUMACallsAvailable() not yet called"); 4964 4965 return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node); 4966} 4967 4968BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) { 4969 assert(initialized && _GetNumaHighestNodeNumber != NULL, 4970 "NUMACallsAvailable() not yet called"); 4971 4972 return _GetNumaHighestNodeNumber(ptr_highest_node_number); 4973} 4974 4975BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) { 4976 assert(initialized && _GetNumaNodeProcessorMask != NULL, 4977 "NUMACallsAvailable() not yet called"); 4978 4979 return _GetNumaNodeProcessorMask(node, proc_mask); 4980} 4981 4982USHORT os::Kernel32Dll::RtlCaptureStackBackTrace(ULONG FrameToSkip, 4983 ULONG FrameToCapture, PVOID* BackTrace, PULONG BackTraceHash) { 4984 if (!initialized) { 4985 initialize(); 4986 } 4987 4988 if (_RtlCaptureStackBackTrace != NULL) { 4989 return _RtlCaptureStackBackTrace(FrameToSkip, FrameToCapture, 4990 BackTrace, BackTraceHash); 4991 } else { 4992 return 0; 4993 } 4994} 4995 4996void os::Kernel32Dll::initializeCommon() { 4997 if (!initialized) { 4998 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 4999 assert(handle != NULL, "Just check"); 5000 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum"); 5001 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma"); 5002 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber"); 5003 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask"); 5004 _RtlCaptureStackBackTrace = (RtlCaptureStackBackTrace_Fn)::GetProcAddress(handle, "RtlCaptureStackBackTrace"); 5005 initialized = TRUE; 5006 } 5007} 5008 5009 5010 5011#ifndef JDK6_OR_EARLIER 5012 5013void os::Kernel32Dll::initialize() { 5014 initializeCommon(); 5015} 5016 5017 5018// Kernel32 API 5019inline BOOL os::Kernel32Dll::SwitchToThread() { 5020 return ::SwitchToThread(); 5021} 5022 5023inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5024 return true; 5025} 5026 5027 // Help tools 5028inline BOOL os::Kernel32Dll::HelpToolsAvailable() { 5029 return true; 5030} 5031 5032inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5033 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5034} 5035 5036inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5037 return ::Module32First(hSnapshot, lpme); 5038} 5039 5040inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5041 return ::Module32Next(hSnapshot, lpme); 5042} 5043 5044 5045inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5046 return true; 5047} 5048 5049inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5050 ::GetNativeSystemInfo(lpSystemInfo); 5051} 5052 5053// PSAPI API 5054inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5055 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5056} 5057 5058inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5059 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5060} 5061 5062inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5063 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5064} 5065 5066inline BOOL os::PSApiDll::PSApiAvailable() { 5067 return true; 5068} 5069 5070 5071// WinSock2 API 5072inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5073 return ::WSAStartup(wVersionRequested, lpWSAData); 5074} 5075 5076inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5077 return ::gethostbyname(name); 5078} 5079 5080inline BOOL os::WinSock2Dll::WinSock2Available() { 5081 return true; 5082} 5083 5084// Advapi API 5085inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5086 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5087 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5088 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5089 BufferLength, PreviousState, ReturnLength); 5090} 5091 5092inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5093 PHANDLE TokenHandle) { 5094 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5095} 5096 5097inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5098 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5099} 5100 5101inline BOOL os::Advapi32Dll::AdvapiAvailable() { 5102 return true; 5103} 5104 5105#else 5106// Kernel32 API 5107typedef BOOL (WINAPI* SwitchToThread_Fn)(void); 5108typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD); 5109typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32); 5110typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32); 5111typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO); 5112 5113SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL; 5114CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL; 5115Module32First_Fn os::Kernel32Dll::_Module32First = NULL; 5116Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL; 5117GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL; 5118 5119void os::Kernel32Dll::initialize() { 5120 if (!initialized) { 5121 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 5122 assert(handle != NULL, "Just check"); 5123 5124 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread"); 5125 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn) 5126 ::GetProcAddress(handle, "CreateToolhelp32Snapshot"); 5127 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First"); 5128 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next"); 5129 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo"); 5130 initializeCommon(); // resolve the functions that always need resolving 5131 5132 initialized = TRUE; 5133 } 5134} 5135 5136BOOL os::Kernel32Dll::SwitchToThread() { 5137 assert(initialized && _SwitchToThread != NULL, 5138 "SwitchToThreadAvailable() not yet called"); 5139 return _SwitchToThread(); 5140} 5141 5142 5143BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5144 if (!initialized) { 5145 initialize(); 5146 } 5147 return _SwitchToThread != NULL; 5148} 5149 5150// Help tools 5151BOOL os::Kernel32Dll::HelpToolsAvailable() { 5152 if (!initialized) { 5153 initialize(); 5154 } 5155 return _CreateToolhelp32Snapshot != NULL && 5156 _Module32First != NULL && 5157 _Module32Next != NULL; 5158} 5159 5160HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5161 assert(initialized && _CreateToolhelp32Snapshot != NULL, 5162 "HelpToolsAvailable() not yet called"); 5163 5164 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5165} 5166 5167BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5168 assert(initialized && _Module32First != NULL, 5169 "HelpToolsAvailable() not yet called"); 5170 5171 return _Module32First(hSnapshot, lpme); 5172} 5173 5174inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5175 assert(initialized && _Module32Next != NULL, 5176 "HelpToolsAvailable() not yet called"); 5177 5178 return _Module32Next(hSnapshot, lpme); 5179} 5180 5181 5182BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5183 if (!initialized) { 5184 initialize(); 5185 } 5186 return _GetNativeSystemInfo != NULL; 5187} 5188 5189void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5190 assert(initialized && _GetNativeSystemInfo != NULL, 5191 "GetNativeSystemInfoAvailable() not yet called"); 5192 5193 _GetNativeSystemInfo(lpSystemInfo); 5194} 5195 5196// PSAPI API 5197 5198 5199typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD); 5200typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);; 5201typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD); 5202 5203EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL; 5204GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL; 5205GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL; 5206BOOL os::PSApiDll::initialized = FALSE; 5207 5208void os::PSApiDll::initialize() { 5209 if (!initialized) { 5210 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0); 5211 if (handle != NULL) { 5212 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle, 5213 "EnumProcessModules"); 5214 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle, 5215 "GetModuleFileNameExA"); 5216 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle, 5217 "GetModuleInformation"); 5218 } 5219 initialized = TRUE; 5220 } 5221} 5222 5223 5224 5225BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5226 assert(initialized && _EnumProcessModules != NULL, 5227 "PSApiAvailable() not yet called"); 5228 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5229} 5230 5231DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5232 assert(initialized && _GetModuleFileNameEx != NULL, 5233 "PSApiAvailable() not yet called"); 5234 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5235} 5236 5237BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5238 assert(initialized && _GetModuleInformation != NULL, 5239 "PSApiAvailable() not yet called"); 5240 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5241} 5242 5243BOOL os::PSApiDll::PSApiAvailable() { 5244 if (!initialized) { 5245 initialize(); 5246 } 5247 return _EnumProcessModules != NULL && 5248 _GetModuleFileNameEx != NULL && 5249 _GetModuleInformation != NULL; 5250} 5251 5252 5253// WinSock2 API 5254typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA); 5255typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...); 5256 5257WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL; 5258gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL; 5259BOOL os::WinSock2Dll::initialized = FALSE; 5260 5261void os::WinSock2Dll::initialize() { 5262 if (!initialized) { 5263 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0); 5264 if (handle != NULL) { 5265 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup"); 5266 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname"); 5267 } 5268 initialized = TRUE; 5269 } 5270} 5271 5272 5273BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5274 assert(initialized && _WSAStartup != NULL, 5275 "WinSock2Available() not yet called"); 5276 return _WSAStartup(wVersionRequested, lpWSAData); 5277} 5278 5279struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5280 assert(initialized && _gethostbyname != NULL, 5281 "WinSock2Available() not yet called"); 5282 return _gethostbyname(name); 5283} 5284 5285BOOL os::WinSock2Dll::WinSock2Available() { 5286 if (!initialized) { 5287 initialize(); 5288 } 5289 return _WSAStartup != NULL && 5290 _gethostbyname != NULL; 5291} 5292 5293typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 5294typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE); 5295typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID); 5296 5297AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL; 5298OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL; 5299LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL; 5300BOOL os::Advapi32Dll::initialized = FALSE; 5301 5302void os::Advapi32Dll::initialize() { 5303 if (!initialized) { 5304 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0); 5305 if (handle != NULL) { 5306 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle, 5307 "AdjustTokenPrivileges"); 5308 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle, 5309 "OpenProcessToken"); 5310 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle, 5311 "LookupPrivilegeValueA"); 5312 } 5313 initialized = TRUE; 5314 } 5315} 5316 5317BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5318 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5319 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5320 assert(initialized && _AdjustTokenPrivileges != NULL, 5321 "AdvapiAvailable() not yet called"); 5322 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5323 BufferLength, PreviousState, ReturnLength); 5324} 5325 5326BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5327 PHANDLE TokenHandle) { 5328 assert(initialized && _OpenProcessToken != NULL, 5329 "AdvapiAvailable() not yet called"); 5330 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5331} 5332 5333BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5334 assert(initialized && _LookupPrivilegeValue != NULL, 5335 "AdvapiAvailable() not yet called"); 5336 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5337} 5338 5339BOOL os::Advapi32Dll::AdvapiAvailable() { 5340 if (!initialized) { 5341 initialize(); 5342 } 5343 return _AdjustTokenPrivileges != NULL && 5344 _OpenProcessToken != NULL && 5345 _LookupPrivilegeValue != NULL; 5346} 5347 5348#endif 5349