os_windows.cpp revision 2995:d7e3846464d0
1/* 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// Must be at least Windows 2000 or XP to use VectoredExceptions and IsDebuggerPresent 26#define _WIN32_WINNT 0x500 27 28// no precompiled headers 29#include "classfile/classLoader.hpp" 30#include "classfile/systemDictionary.hpp" 31#include "classfile/vmSymbols.hpp" 32#include "code/icBuffer.hpp" 33#include "code/vtableStubs.hpp" 34#include "compiler/compileBroker.hpp" 35#include "interpreter/interpreter.hpp" 36#include "jvm_windows.h" 37#include "memory/allocation.inline.hpp" 38#include "memory/filemap.hpp" 39#include "mutex_windows.inline.hpp" 40#include "oops/oop.inline.hpp" 41#include "os_share_windows.hpp" 42#include "prims/jniFastGetField.hpp" 43#include "prims/jvm.h" 44#include "prims/jvm_misc.hpp" 45#include "runtime/arguments.hpp" 46#include "runtime/extendedPC.hpp" 47#include "runtime/globals.hpp" 48#include "runtime/interfaceSupport.hpp" 49#include "runtime/java.hpp" 50#include "runtime/javaCalls.hpp" 51#include "runtime/mutexLocker.hpp" 52#include "runtime/objectMonitor.hpp" 53#include "runtime/osThread.hpp" 54#include "runtime/perfMemory.hpp" 55#include "runtime/sharedRuntime.hpp" 56#include "runtime/statSampler.hpp" 57#include "runtime/stubRoutines.hpp" 58#include "runtime/threadCritical.hpp" 59#include "runtime/timer.hpp" 60#include "services/attachListener.hpp" 61#include "services/runtimeService.hpp" 62#include "thread_windows.inline.hpp" 63#include "utilities/decoder.hpp" 64#include "utilities/defaultStream.hpp" 65#include "utilities/events.hpp" 66#include "utilities/growableArray.hpp" 67#include "utilities/vmError.hpp" 68#ifdef TARGET_ARCH_x86 69# include "assembler_x86.inline.hpp" 70# include "nativeInst_x86.hpp" 71#endif 72#ifdef COMPILER1 73#include "c1/c1_Runtime1.hpp" 74#endif 75#ifdef COMPILER2 76#include "opto/runtime.hpp" 77#endif 78 79#ifdef _DEBUG 80#include <crtdbg.h> 81#endif 82 83 84#include <windows.h> 85#include <sys/types.h> 86#include <sys/stat.h> 87#include <sys/timeb.h> 88#include <objidl.h> 89#include <shlobj.h> 90 91#include <malloc.h> 92#include <signal.h> 93#include <direct.h> 94#include <errno.h> 95#include <fcntl.h> 96#include <io.h> 97#include <process.h> // For _beginthreadex(), _endthreadex() 98#include <imagehlp.h> // For os::dll_address_to_function_name 99 100/* for enumerating dll libraries */ 101#include <vdmdbg.h> 102 103// for timer info max values which include all bits 104#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 105 106// For DLL loading/load error detection 107// Values of PE COFF 108#define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c 109#define IMAGE_FILE_SIGNATURE_LENGTH 4 110 111static HANDLE main_process; 112static HANDLE main_thread; 113static int main_thread_id; 114 115static FILETIME process_creation_time; 116static FILETIME process_exit_time; 117static FILETIME process_user_time; 118static FILETIME process_kernel_time; 119 120#ifdef _WIN64 121PVOID topLevelVectoredExceptionHandler = NULL; 122#endif 123 124#ifdef _M_IA64 125#define __CPU__ ia64 126#elif _M_AMD64 127#define __CPU__ amd64 128#else 129#define __CPU__ i486 130#endif 131 132// save DLL module handle, used by GetModuleFileName 133 134HINSTANCE vm_lib_handle; 135 136BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { 137 switch (reason) { 138 case DLL_PROCESS_ATTACH: 139 vm_lib_handle = hinst; 140 if(ForceTimeHighResolution) 141 timeBeginPeriod(1L); 142 break; 143 case DLL_PROCESS_DETACH: 144 if(ForceTimeHighResolution) 145 timeEndPeriod(1L); 146#ifdef _WIN64 147 if (topLevelVectoredExceptionHandler != NULL) { 148 RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler); 149 topLevelVectoredExceptionHandler = NULL; 150 } 151#endif 152 break; 153 default: 154 break; 155 } 156 return true; 157} 158 159static inline double fileTimeAsDouble(FILETIME* time) { 160 const double high = (double) ((unsigned int) ~0); 161 const double split = 10000000.0; 162 double result = (time->dwLowDateTime / split) + 163 time->dwHighDateTime * (high/split); 164 return result; 165} 166 167// Implementation of os 168 169bool os::getenv(const char* name, char* buffer, int len) { 170 int result = GetEnvironmentVariable(name, buffer, len); 171 return result > 0 && result < len; 172} 173 174 175// No setuid programs under Windows. 176bool os::have_special_privileges() { 177 return false; 178} 179 180 181// This method is a periodic task to check for misbehaving JNI applications 182// under CheckJNI, we can add any periodic checks here. 183// For Windows at the moment does nothing 184void os::run_periodic_checks() { 185 return; 186} 187 188#ifndef _WIN64 189// previous UnhandledExceptionFilter, if there is one 190static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL; 191 192LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); 193#endif 194void os::init_system_properties_values() { 195 /* sysclasspath, java_home, dll_dir */ 196 { 197 char *home_path; 198 char *dll_path; 199 char *pslash; 200 char *bin = "\\bin"; 201 char home_dir[MAX_PATH]; 202 203 if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { 204 os::jvm_path(home_dir, sizeof(home_dir)); 205 // Found the full path to jvm[_g].dll. 206 // Now cut the path to <java_home>/jre if we can. 207 *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ 208 pslash = strrchr(home_dir, '\\'); 209 if (pslash != NULL) { 210 *pslash = '\0'; /* get rid of \{client|server} */ 211 pslash = strrchr(home_dir, '\\'); 212 if (pslash != NULL) 213 *pslash = '\0'; /* get rid of \bin */ 214 } 215 } 216 217 home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1); 218 if (home_path == NULL) 219 return; 220 strcpy(home_path, home_dir); 221 Arguments::set_java_home(home_path); 222 223 dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1); 224 if (dll_path == NULL) 225 return; 226 strcpy(dll_path, home_dir); 227 strcat(dll_path, bin); 228 Arguments::set_dll_dir(dll_path); 229 230 if (!set_boot_path('\\', ';')) 231 return; 232 } 233 234 /* library_path */ 235 #define EXT_DIR "\\lib\\ext" 236 #define BIN_DIR "\\bin" 237 #define PACKAGE_DIR "\\Sun\\Java" 238 { 239 /* Win32 library search order (See the documentation for LoadLibrary): 240 * 241 * 1. The directory from which application is loaded. 242 * 2. The system wide Java Extensions directory (Java only) 243 * 3. System directory (GetSystemDirectory) 244 * 4. Windows directory (GetWindowsDirectory) 245 * 5. The PATH environment variable 246 * 6. The current directory 247 */ 248 249 char *library_path; 250 char tmp[MAX_PATH]; 251 char *path_str = ::getenv("PATH"); 252 253 library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + 254 sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10); 255 256 library_path[0] = '\0'; 257 258 GetModuleFileName(NULL, tmp, sizeof(tmp)); 259 *(strrchr(tmp, '\\')) = '\0'; 260 strcat(library_path, tmp); 261 262 GetWindowsDirectory(tmp, sizeof(tmp)); 263 strcat(library_path, ";"); 264 strcat(library_path, tmp); 265 strcat(library_path, PACKAGE_DIR BIN_DIR); 266 267 GetSystemDirectory(tmp, sizeof(tmp)); 268 strcat(library_path, ";"); 269 strcat(library_path, tmp); 270 271 GetWindowsDirectory(tmp, sizeof(tmp)); 272 strcat(library_path, ";"); 273 strcat(library_path, tmp); 274 275 if (path_str) { 276 strcat(library_path, ";"); 277 strcat(library_path, path_str); 278 } 279 280 strcat(library_path, ";."); 281 282 Arguments::set_library_path(library_path); 283 FREE_C_HEAP_ARRAY(char, library_path); 284 } 285 286 /* Default extensions directory */ 287 { 288 char path[MAX_PATH]; 289 char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; 290 GetWindowsDirectory(path, MAX_PATH); 291 sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, 292 path, PACKAGE_DIR, EXT_DIR); 293 Arguments::set_ext_dirs(buf); 294 } 295 #undef EXT_DIR 296 #undef BIN_DIR 297 #undef PACKAGE_DIR 298 299 /* Default endorsed standards directory. */ 300 { 301 #define ENDORSED_DIR "\\lib\\endorsed" 302 size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); 303 char * buf = NEW_C_HEAP_ARRAY(char, len); 304 sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); 305 Arguments::set_endorsed_dirs(buf); 306 #undef ENDORSED_DIR 307 } 308 309#ifndef _WIN64 310 // set our UnhandledExceptionFilter and save any previous one 311 prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception); 312#endif 313 314 // Done 315 return; 316} 317 318void os::breakpoint() { 319 DebugBreak(); 320} 321 322// Invoked from the BREAKPOINT Macro 323extern "C" void breakpoint() { 324 os::breakpoint(); 325} 326 327// Returns an estimate of the current stack pointer. Result must be guaranteed 328// to point into the calling threads stack, and be no lower than the current 329// stack pointer. 330 331address os::current_stack_pointer() { 332 int dummy; 333 address sp = (address)&dummy; 334 return sp; 335} 336 337// os::current_stack_base() 338// 339// Returns the base of the stack, which is the stack's 340// starting address. This function must be called 341// while running on the stack of the thread being queried. 342 343address os::current_stack_base() { 344 MEMORY_BASIC_INFORMATION minfo; 345 address stack_bottom; 346 size_t stack_size; 347 348 VirtualQuery(&minfo, &minfo, sizeof(minfo)); 349 stack_bottom = (address)minfo.AllocationBase; 350 stack_size = minfo.RegionSize; 351 352 // Add up the sizes of all the regions with the same 353 // AllocationBase. 354 while( 1 ) 355 { 356 VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); 357 if ( stack_bottom == (address)minfo.AllocationBase ) 358 stack_size += minfo.RegionSize; 359 else 360 break; 361 } 362 363#ifdef _M_IA64 364 // IA64 has memory and register stacks 365 stack_size = stack_size / 2; 366#endif 367 return stack_bottom + stack_size; 368} 369 370size_t os::current_stack_size() { 371 size_t sz; 372 MEMORY_BASIC_INFORMATION minfo; 373 VirtualQuery(&minfo, &minfo, sizeof(minfo)); 374 sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; 375 return sz; 376} 377 378struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 379 const struct tm* time_struct_ptr = localtime(clock); 380 if (time_struct_ptr != NULL) { 381 *res = *time_struct_ptr; 382 return res; 383 } 384 return NULL; 385} 386 387LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); 388 389// Thread start routine for all new Java threads 390static unsigned __stdcall java_start(Thread* thread) { 391 // Try to randomize the cache line index of hot stack frames. 392 // This helps when threads of the same stack traces evict each other's 393 // cache lines. The threads can be either from the same JVM instance, or 394 // from different JVM instances. The benefit is especially true for 395 // processors with hyperthreading technology. 396 static int counter = 0; 397 int pid = os::current_process_id(); 398 _alloca(((pid ^ counter++) & 7) * 128); 399 400 OSThread* osthr = thread->osthread(); 401 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 402 403 if (UseNUMA) { 404 int lgrp_id = os::numa_get_group_id(); 405 if (lgrp_id != -1) { 406 thread->set_lgrp_id(lgrp_id); 407 } 408 } 409 410 411 if (UseVectoredExceptions) { 412 // If we are using vectored exception we don't need to set a SEH 413 thread->run(); 414 } 415 else { 416 // Install a win32 structured exception handler around every thread created 417 // by VM, so VM can genrate error dump when an exception occurred in non- 418 // Java thread (e.g. VM thread). 419 __try { 420 thread->run(); 421 } __except(topLevelExceptionFilter( 422 (_EXCEPTION_POINTERS*)_exception_info())) { 423 // Nothing to do. 424 } 425 } 426 427 // One less thread is executing 428 // When the VMThread gets here, the main thread may have already exited 429 // which frees the CodeHeap containing the Atomic::add code 430 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 431 Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); 432 } 433 434 return 0; 435} 436 437static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { 438 // Allocate the OSThread object 439 OSThread* osthread = new OSThread(NULL, NULL); 440 if (osthread == NULL) return NULL; 441 442 // Initialize support for Java interrupts 443 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 444 if (interrupt_event == NULL) { 445 delete osthread; 446 return NULL; 447 } 448 osthread->set_interrupt_event(interrupt_event); 449 450 // Store info on the Win32 thread into the OSThread 451 osthread->set_thread_handle(thread_handle); 452 osthread->set_thread_id(thread_id); 453 454 if (UseNUMA) { 455 int lgrp_id = os::numa_get_group_id(); 456 if (lgrp_id != -1) { 457 thread->set_lgrp_id(lgrp_id); 458 } 459 } 460 461 // Initial thread state is INITIALIZED, not SUSPENDED 462 osthread->set_state(INITIALIZED); 463 464 return osthread; 465} 466 467 468bool os::create_attached_thread(JavaThread* thread) { 469#ifdef ASSERT 470 thread->verify_not_published(); 471#endif 472 HANDLE thread_h; 473 if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), 474 &thread_h, THREAD_ALL_ACCESS, false, 0)) { 475 fatal("DuplicateHandle failed\n"); 476 } 477 OSThread* osthread = create_os_thread(thread, thread_h, 478 (int)current_thread_id()); 479 if (osthread == NULL) { 480 return false; 481 } 482 483 // Initial thread state is RUNNABLE 484 osthread->set_state(RUNNABLE); 485 486 thread->set_osthread(osthread); 487 return true; 488} 489 490bool os::create_main_thread(JavaThread* thread) { 491#ifdef ASSERT 492 thread->verify_not_published(); 493#endif 494 if (_starting_thread == NULL) { 495 _starting_thread = create_os_thread(thread, main_thread, main_thread_id); 496 if (_starting_thread == NULL) { 497 return false; 498 } 499 } 500 501 // The primordial thread is runnable from the start) 502 _starting_thread->set_state(RUNNABLE); 503 504 thread->set_osthread(_starting_thread); 505 return true; 506} 507 508// Allocate and initialize a new OSThread 509bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 510 unsigned thread_id; 511 512 // Allocate the OSThread object 513 OSThread* osthread = new OSThread(NULL, NULL); 514 if (osthread == NULL) { 515 return false; 516 } 517 518 // Initialize support for Java interrupts 519 HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 520 if (interrupt_event == NULL) { 521 delete osthread; 522 return NULL; 523 } 524 osthread->set_interrupt_event(interrupt_event); 525 osthread->set_interrupted(false); 526 527 thread->set_osthread(osthread); 528 529 if (stack_size == 0) { 530 switch (thr_type) { 531 case os::java_thread: 532 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 533 if (JavaThread::stack_size_at_create() > 0) 534 stack_size = JavaThread::stack_size_at_create(); 535 break; 536 case os::compiler_thread: 537 if (CompilerThreadStackSize > 0) { 538 stack_size = (size_t)(CompilerThreadStackSize * K); 539 break; 540 } // else fall through: 541 // use VMThreadStackSize if CompilerThreadStackSize is not defined 542 case os::vm_thread: 543 case os::pgc_thread: 544 case os::cgc_thread: 545 case os::watcher_thread: 546 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 547 break; 548 } 549 } 550 551 // Create the Win32 thread 552 // 553 // Contrary to what MSDN document says, "stack_size" in _beginthreadex() 554 // does not specify stack size. Instead, it specifies the size of 555 // initially committed space. The stack size is determined by 556 // PE header in the executable. If the committed "stack_size" is larger 557 // than default value in the PE header, the stack is rounded up to the 558 // nearest multiple of 1MB. For example if the launcher has default 559 // stack size of 320k, specifying any size less than 320k does not 560 // affect the actual stack size at all, it only affects the initial 561 // commitment. On the other hand, specifying 'stack_size' larger than 562 // default value may cause significant increase in memory usage, because 563 // not only the stack space will be rounded up to MB, but also the 564 // entire space is committed upfront. 565 // 566 // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' 567 // for CreateThread() that can treat 'stack_size' as stack size. However we 568 // are not supposed to call CreateThread() directly according to MSDN 569 // document because JVM uses C runtime library. The good news is that the 570 // flag appears to work with _beginthredex() as well. 571 572#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION 573#define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) 574#endif 575 576 HANDLE thread_handle = 577 (HANDLE)_beginthreadex(NULL, 578 (unsigned)stack_size, 579 (unsigned (__stdcall *)(void*)) java_start, 580 thread, 581 CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, 582 &thread_id); 583 if (thread_handle == NULL) { 584 // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again 585 // without the flag. 586 thread_handle = 587 (HANDLE)_beginthreadex(NULL, 588 (unsigned)stack_size, 589 (unsigned (__stdcall *)(void*)) java_start, 590 thread, 591 CREATE_SUSPENDED, 592 &thread_id); 593 } 594 if (thread_handle == NULL) { 595 // Need to clean up stuff we've allocated so far 596 CloseHandle(osthread->interrupt_event()); 597 thread->set_osthread(NULL); 598 delete osthread; 599 return NULL; 600 } 601 602 Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); 603 604 // Store info on the Win32 thread into the OSThread 605 osthread->set_thread_handle(thread_handle); 606 osthread->set_thread_id(thread_id); 607 608 // Initial thread state is INITIALIZED, not SUSPENDED 609 osthread->set_state(INITIALIZED); 610 611 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 612 return true; 613} 614 615 616// Free Win32 resources related to the OSThread 617void os::free_thread(OSThread* osthread) { 618 assert(osthread != NULL, "osthread not set"); 619 CloseHandle(osthread->thread_handle()); 620 CloseHandle(osthread->interrupt_event()); 621 delete osthread; 622} 623 624 625static int has_performance_count = 0; 626static jlong first_filetime; 627static jlong initial_performance_count; 628static jlong performance_frequency; 629 630 631jlong as_long(LARGE_INTEGER x) { 632 jlong result = 0; // initialization to avoid warning 633 set_high(&result, x.HighPart); 634 set_low(&result, x.LowPart); 635 return result; 636} 637 638 639jlong os::elapsed_counter() { 640 LARGE_INTEGER count; 641 if (has_performance_count) { 642 QueryPerformanceCounter(&count); 643 return as_long(count) - initial_performance_count; 644 } else { 645 FILETIME wt; 646 GetSystemTimeAsFileTime(&wt); 647 return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); 648 } 649} 650 651 652jlong os::elapsed_frequency() { 653 if (has_performance_count) { 654 return performance_frequency; 655 } else { 656 // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. 657 return 10000000; 658 } 659} 660 661 662julong os::available_memory() { 663 return win32::available_memory(); 664} 665 666julong os::win32::available_memory() { 667 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 668 // value if total memory is larger than 4GB 669 MEMORYSTATUSEX ms; 670 ms.dwLength = sizeof(ms); 671 GlobalMemoryStatusEx(&ms); 672 673 return (julong)ms.ullAvailPhys; 674} 675 676julong os::physical_memory() { 677 return win32::physical_memory(); 678} 679 680julong os::allocatable_physical_memory(julong size) { 681#ifdef _LP64 682 return size; 683#else 684 // Limit to 1400m because of the 2gb address space wall 685 return MIN2(size, (julong)1400*M); 686#endif 687} 688 689// VC6 lacks DWORD_PTR 690#if _MSC_VER < 1300 691typedef UINT_PTR DWORD_PTR; 692#endif 693 694int os::active_processor_count() { 695 DWORD_PTR lpProcessAffinityMask = 0; 696 DWORD_PTR lpSystemAffinityMask = 0; 697 int proc_count = processor_count(); 698 if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && 699 GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { 700 // Nof active processors is number of bits in process affinity mask 701 int bitcount = 0; 702 while (lpProcessAffinityMask != 0) { 703 lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); 704 bitcount++; 705 } 706 return bitcount; 707 } else { 708 return proc_count; 709 } 710} 711 712void os::set_native_thread_name(const char *name) { 713 // Not yet implemented. 714 return; 715} 716 717bool os::distribute_processes(uint length, uint* distribution) { 718 // Not yet implemented. 719 return false; 720} 721 722bool os::bind_to_processor(uint processor_id) { 723 // Not yet implemented. 724 return false; 725} 726 727static void initialize_performance_counter() { 728 LARGE_INTEGER count; 729 if (QueryPerformanceFrequency(&count)) { 730 has_performance_count = 1; 731 performance_frequency = as_long(count); 732 QueryPerformanceCounter(&count); 733 initial_performance_count = as_long(count); 734 } else { 735 has_performance_count = 0; 736 FILETIME wt; 737 GetSystemTimeAsFileTime(&wt); 738 first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 739 } 740} 741 742 743double os::elapsedTime() { 744 return (double) elapsed_counter() / (double) elapsed_frequency(); 745} 746 747 748// Windows format: 749// The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. 750// Java format: 751// Java standards require the number of milliseconds since 1/1/1970 752 753// Constant offset - calculated using offset() 754static jlong _offset = 116444736000000000; 755// Fake time counter for reproducible results when debugging 756static jlong fake_time = 0; 757 758#ifdef ASSERT 759// Just to be safe, recalculate the offset in debug mode 760static jlong _calculated_offset = 0; 761static int _has_calculated_offset = 0; 762 763jlong offset() { 764 if (_has_calculated_offset) return _calculated_offset; 765 SYSTEMTIME java_origin; 766 java_origin.wYear = 1970; 767 java_origin.wMonth = 1; 768 java_origin.wDayOfWeek = 0; // ignored 769 java_origin.wDay = 1; 770 java_origin.wHour = 0; 771 java_origin.wMinute = 0; 772 java_origin.wSecond = 0; 773 java_origin.wMilliseconds = 0; 774 FILETIME jot; 775 if (!SystemTimeToFileTime(&java_origin, &jot)) { 776 fatal(err_msg("Error = %d\nWindows error", GetLastError())); 777 } 778 _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); 779 _has_calculated_offset = 1; 780 assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); 781 return _calculated_offset; 782} 783#else 784jlong offset() { 785 return _offset; 786} 787#endif 788 789jlong windows_to_java_time(FILETIME wt) { 790 jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 791 return (a - offset()) / 10000; 792} 793 794FILETIME java_to_windows_time(jlong l) { 795 jlong a = (l * 10000) + offset(); 796 FILETIME result; 797 result.dwHighDateTime = high(a); 798 result.dwLowDateTime = low(a); 799 return result; 800} 801 802// For now, we say that Windows does not support vtime. I have no idea 803// whether it can actually be made to (DLD, 9/13/05). 804 805bool os::supports_vtime() { return false; } 806bool os::enable_vtime() { return false; } 807bool os::vtime_enabled() { return false; } 808double os::elapsedVTime() { 809 // better than nothing, but not much 810 return elapsedTime(); 811} 812 813jlong os::javaTimeMillis() { 814 if (UseFakeTimers) { 815 return fake_time++; 816 } else { 817 FILETIME wt; 818 GetSystemTimeAsFileTime(&wt); 819 return windows_to_java_time(wt); 820 } 821} 822 823jlong os::javaTimeNanos() { 824 if (!has_performance_count) { 825 return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do. 826 } else { 827 LARGE_INTEGER current_count; 828 QueryPerformanceCounter(¤t_count); 829 double current = as_long(current_count); 830 double freq = performance_frequency; 831 jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC); 832 return time; 833 } 834} 835 836void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 837 if (!has_performance_count) { 838 // javaTimeMillis() doesn't have much percision, 839 // but it is not going to wrap -- so all 64 bits 840 info_ptr->max_value = ALL_64_BITS; 841 842 // this is a wall clock timer, so may skip 843 info_ptr->may_skip_backward = true; 844 info_ptr->may_skip_forward = true; 845 } else { 846 jlong freq = performance_frequency; 847 if (freq < NANOSECS_PER_SEC) { 848 // the performance counter is 64 bits and we will 849 // be multiplying it -- so no wrap in 64 bits 850 info_ptr->max_value = ALL_64_BITS; 851 } else if (freq > NANOSECS_PER_SEC) { 852 // use the max value the counter can reach to 853 // determine the max value which could be returned 854 julong max_counter = (julong)ALL_64_BITS; 855 info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC)); 856 } else { 857 // the performance counter is 64 bits and we will 858 // be using it directly -- so no wrap in 64 bits 859 info_ptr->max_value = ALL_64_BITS; 860 } 861 862 // using a counter, so no skipping 863 info_ptr->may_skip_backward = false; 864 info_ptr->may_skip_forward = false; 865 } 866 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 867} 868 869char* os::local_time_string(char *buf, size_t buflen) { 870 SYSTEMTIME st; 871 GetLocalTime(&st); 872 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 873 st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); 874 return buf; 875} 876 877bool os::getTimesSecs(double* process_real_time, 878 double* process_user_time, 879 double* process_system_time) { 880 HANDLE h_process = GetCurrentProcess(); 881 FILETIME create_time, exit_time, kernel_time, user_time; 882 BOOL result = GetProcessTimes(h_process, 883 &create_time, 884 &exit_time, 885 &kernel_time, 886 &user_time); 887 if (result != 0) { 888 FILETIME wt; 889 GetSystemTimeAsFileTime(&wt); 890 jlong rtc_millis = windows_to_java_time(wt); 891 jlong user_millis = windows_to_java_time(user_time); 892 jlong system_millis = windows_to_java_time(kernel_time); 893 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); 894 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); 895 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); 896 return true; 897 } else { 898 return false; 899 } 900} 901 902void os::shutdown() { 903 904 // allow PerfMemory to attempt cleanup of any persistent resources 905 perfMemory_exit(); 906 907 // flush buffered output, finish log files 908 ostream_abort(); 909 910 // Check for abort hook 911 abort_hook_t abort_hook = Arguments::abort_hook(); 912 if (abort_hook != NULL) { 913 abort_hook(); 914 } 915} 916 917 918static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 919 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION); 920 921void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) { 922 HINSTANCE dbghelp; 923 EXCEPTION_POINTERS ep; 924 MINIDUMP_EXCEPTION_INFORMATION mei; 925 MINIDUMP_EXCEPTION_INFORMATION* pmei; 926 927 HANDLE hProcess = GetCurrentProcess(); 928 DWORD processId = GetCurrentProcessId(); 929 HANDLE dumpFile; 930 MINIDUMP_TYPE dumpType; 931 static const char* cwd; 932 933 // If running on a client version of Windows and user has not explicitly enabled dumping 934 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) { 935 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false); 936 return; 937 // If running on a server version of Windows and user has explictly disabled dumping 938 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) { 939 VMError::report_coredump_status("Minidump has been disabled from the command line", false); 940 return; 941 } 942 943 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0); 944 945 if (dbghelp == NULL) { 946 VMError::report_coredump_status("Failed to load dbghelp.dll", false); 947 return; 948 } 949 950 _MiniDumpWriteDump = CAST_TO_FN_PTR( 951 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 952 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION), 953 GetProcAddress(dbghelp, "MiniDumpWriteDump")); 954 955 if (_MiniDumpWriteDump == NULL) { 956 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false); 957 return; 958 } 959 960 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData); 961 962// Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with 963// API_VERSION_NUMBER 11 or higher contains the ones we want though 964#if API_VERSION_NUMBER >= 11 965 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo | 966 MiniDumpWithUnloadedModules); 967#endif 968 969 cwd = get_current_directory(NULL, 0); 970 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id()); 971 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 972 973 if (dumpFile == INVALID_HANDLE_VALUE) { 974 VMError::report_coredump_status("Failed to create file for dumping", false); 975 return; 976 } 977 if (exceptionRecord != NULL && contextRecord != NULL) { 978 ep.ContextRecord = (PCONTEXT) contextRecord; 979 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord; 980 981 mei.ThreadId = GetCurrentThreadId(); 982 mei.ExceptionPointers = &ep; 983 pmei = &mei; 984 } else { 985 pmei = NULL; 986 } 987 988 989 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all 990 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then. 991 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false && 992 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) { 993 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false); 994 } else { 995 VMError::report_coredump_status(buffer, true); 996 } 997 998 CloseHandle(dumpFile); 999} 1000 1001 1002 1003void os::abort(bool dump_core) 1004{ 1005 os::shutdown(); 1006 // no core dump on Windows 1007 ::exit(1); 1008} 1009 1010// Die immediately, no exit hook, no abort hook, no cleanup. 1011void os::die() { 1012 _exit(-1); 1013} 1014 1015// Directory routines copied from src/win32/native/java/io/dirent_md.c 1016// * dirent_md.c 1.15 00/02/02 1017// 1018// The declarations for DIR and struct dirent are in jvm_win32.h. 1019 1020/* Caller must have already run dirname through JVM_NativePath, which removes 1021 duplicate slashes and converts all instances of '/' into '\\'. */ 1022 1023DIR * 1024os::opendir(const char *dirname) 1025{ 1026 assert(dirname != NULL, "just checking"); // hotspot change 1027 DIR *dirp = (DIR *)malloc(sizeof(DIR)); 1028 DWORD fattr; // hotspot change 1029 char alt_dirname[4] = { 0, 0, 0, 0 }; 1030 1031 if (dirp == 0) { 1032 errno = ENOMEM; 1033 return 0; 1034 } 1035 1036 /* 1037 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it 1038 * as a directory in FindFirstFile(). We detect this case here and 1039 * prepend the current drive name. 1040 */ 1041 if (dirname[1] == '\0' && dirname[0] == '\\') { 1042 alt_dirname[0] = _getdrive() + 'A' - 1; 1043 alt_dirname[1] = ':'; 1044 alt_dirname[2] = '\\'; 1045 alt_dirname[3] = '\0'; 1046 dirname = alt_dirname; 1047 } 1048 1049 dirp->path = (char *)malloc(strlen(dirname) + 5); 1050 if (dirp->path == 0) { 1051 free(dirp); 1052 errno = ENOMEM; 1053 return 0; 1054 } 1055 strcpy(dirp->path, dirname); 1056 1057 fattr = GetFileAttributes(dirp->path); 1058 if (fattr == 0xffffffff) { 1059 free(dirp->path); 1060 free(dirp); 1061 errno = ENOENT; 1062 return 0; 1063 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { 1064 free(dirp->path); 1065 free(dirp); 1066 errno = ENOTDIR; 1067 return 0; 1068 } 1069 1070 /* Append "*.*", or possibly "\\*.*", to path */ 1071 if (dirp->path[1] == ':' 1072 && (dirp->path[2] == '\0' 1073 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { 1074 /* No '\\' needed for cases like "Z:" or "Z:\" */ 1075 strcat(dirp->path, "*.*"); 1076 } else { 1077 strcat(dirp->path, "\\*.*"); 1078 } 1079 1080 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); 1081 if (dirp->handle == INVALID_HANDLE_VALUE) { 1082 if (GetLastError() != ERROR_FILE_NOT_FOUND) { 1083 free(dirp->path); 1084 free(dirp); 1085 errno = EACCES; 1086 return 0; 1087 } 1088 } 1089 return dirp; 1090} 1091 1092/* parameter dbuf unused on Windows */ 1093 1094struct dirent * 1095os::readdir(DIR *dirp, dirent *dbuf) 1096{ 1097 assert(dirp != NULL, "just checking"); // hotspot change 1098 if (dirp->handle == INVALID_HANDLE_VALUE) { 1099 return 0; 1100 } 1101 1102 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); 1103 1104 if (!FindNextFile(dirp->handle, &dirp->find_data)) { 1105 if (GetLastError() == ERROR_INVALID_HANDLE) { 1106 errno = EBADF; 1107 return 0; 1108 } 1109 FindClose(dirp->handle); 1110 dirp->handle = INVALID_HANDLE_VALUE; 1111 } 1112 1113 return &dirp->dirent; 1114} 1115 1116int 1117os::closedir(DIR *dirp) 1118{ 1119 assert(dirp != NULL, "just checking"); // hotspot change 1120 if (dirp->handle != INVALID_HANDLE_VALUE) { 1121 if (!FindClose(dirp->handle)) { 1122 errno = EBADF; 1123 return -1; 1124 } 1125 dirp->handle = INVALID_HANDLE_VALUE; 1126 } 1127 free(dirp->path); 1128 free(dirp); 1129 return 0; 1130} 1131 1132// This must be hard coded because it's the system's temporary 1133// directory not the java application's temp directory, ala java.io.tmpdir. 1134const char* os::get_temp_directory() { 1135 static char path_buf[MAX_PATH]; 1136 if (GetTempPath(MAX_PATH, path_buf)>0) 1137 return path_buf; 1138 else{ 1139 path_buf[0]='\0'; 1140 return path_buf; 1141 } 1142} 1143 1144static bool file_exists(const char* filename) { 1145 if (filename == NULL || strlen(filename) == 0) { 1146 return false; 1147 } 1148 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; 1149} 1150 1151void os::dll_build_name(char *buffer, size_t buflen, 1152 const char* pname, const char* fname) { 1153 const size_t pnamelen = pname ? strlen(pname) : 0; 1154 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; 1155 1156 // Quietly truncates on buffer overflow. Should be an error. 1157 if (pnamelen + strlen(fname) + 10 > buflen) { 1158 *buffer = '\0'; 1159 return; 1160 } 1161 1162 if (pnamelen == 0) { 1163 jio_snprintf(buffer, buflen, "%s.dll", fname); 1164 } else if (c == ':' || c == '\\') { 1165 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); 1166 } else if (strchr(pname, *os::path_separator()) != NULL) { 1167 int n; 1168 char** pelements = split_path(pname, &n); 1169 for (int i = 0 ; i < n ; i++) { 1170 char* path = pelements[i]; 1171 // Really shouldn't be NULL, but check can't hurt 1172 size_t plen = (path == NULL) ? 0 : strlen(path); 1173 if (plen == 0) { 1174 continue; // skip the empty path values 1175 } 1176 const char lastchar = path[plen - 1]; 1177 if (lastchar == ':' || lastchar == '\\') { 1178 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); 1179 } else { 1180 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); 1181 } 1182 if (file_exists(buffer)) { 1183 break; 1184 } 1185 } 1186 // release the storage 1187 for (int i = 0 ; i < n ; i++) { 1188 if (pelements[i] != NULL) { 1189 FREE_C_HEAP_ARRAY(char, pelements[i]); 1190 } 1191 } 1192 if (pelements != NULL) { 1193 FREE_C_HEAP_ARRAY(char*, pelements); 1194 } 1195 } else { 1196 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); 1197 } 1198} 1199 1200// Needs to be in os specific directory because windows requires another 1201// header file <direct.h> 1202const char* os::get_current_directory(char *buf, int buflen) { 1203 return _getcwd(buf, buflen); 1204} 1205 1206//----------------------------------------------------------- 1207// Helper functions for fatal error handler 1208#ifdef _WIN64 1209// Helper routine which returns true if address in 1210// within the NTDLL address space. 1211// 1212static bool _addr_in_ntdll( address addr ) 1213{ 1214 HMODULE hmod; 1215 MODULEINFO minfo; 1216 1217 hmod = GetModuleHandle("NTDLL.DLL"); 1218 if ( hmod == NULL ) return false; 1219 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod, 1220 &minfo, sizeof(MODULEINFO)) ) 1221 return false; 1222 1223 if ( (addr >= minfo.lpBaseOfDll) && 1224 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) 1225 return true; 1226 else 1227 return false; 1228} 1229#endif 1230 1231 1232// Enumerate all modules for a given process ID 1233// 1234// Notice that Windows 95/98/Me and Windows NT/2000/XP have 1235// different API for doing this. We use PSAPI.DLL on NT based 1236// Windows and ToolHelp on 95/98/Me. 1237 1238// Callback function that is called by enumerate_modules() on 1239// every DLL module. 1240// Input parameters: 1241// int pid, 1242// char* module_file_name, 1243// address module_base_addr, 1244// unsigned module_size, 1245// void* param 1246typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); 1247 1248// enumerate_modules for Windows NT, using PSAPI 1249static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) 1250{ 1251 HANDLE hProcess ; 1252 1253# define MAX_NUM_MODULES 128 1254 HMODULE modules[MAX_NUM_MODULES]; 1255 static char filename[ MAX_PATH ]; 1256 int result = 0; 1257 1258 if (!os::PSApiDll::PSApiAvailable()) { 1259 return 0; 1260 } 1261 1262 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 1263 FALSE, pid ) ; 1264 if (hProcess == NULL) return 0; 1265 1266 DWORD size_needed; 1267 if (!os::PSApiDll::EnumProcessModules(hProcess, modules, 1268 sizeof(modules), &size_needed)) { 1269 CloseHandle( hProcess ); 1270 return 0; 1271 } 1272 1273 // number of modules that are currently loaded 1274 int num_modules = size_needed / sizeof(HMODULE); 1275 1276 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { 1277 // Get Full pathname: 1278 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i], 1279 filename, sizeof(filename))) { 1280 filename[0] = '\0'; 1281 } 1282 1283 MODULEINFO modinfo; 1284 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i], 1285 &modinfo, sizeof(modinfo))) { 1286 modinfo.lpBaseOfDll = NULL; 1287 modinfo.SizeOfImage = 0; 1288 } 1289 1290 // Invoke callback function 1291 result = func(pid, filename, (address)modinfo.lpBaseOfDll, 1292 modinfo.SizeOfImage, param); 1293 if (result) break; 1294 } 1295 1296 CloseHandle( hProcess ) ; 1297 return result; 1298} 1299 1300 1301// enumerate_modules for Windows 95/98/ME, using TOOLHELP 1302static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) 1303{ 1304 HANDLE hSnapShot ; 1305 static MODULEENTRY32 modentry ; 1306 int result = 0; 1307 1308 if (!os::Kernel32Dll::HelpToolsAvailable()) { 1309 return 0; 1310 } 1311 1312 // Get a handle to a Toolhelp snapshot of the system 1313 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; 1314 if( hSnapShot == INVALID_HANDLE_VALUE ) { 1315 return FALSE ; 1316 } 1317 1318 // iterate through all modules 1319 modentry.dwSize = sizeof(MODULEENTRY32) ; 1320 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0; 1321 1322 while( not_done ) { 1323 // invoke the callback 1324 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, 1325 modentry.modBaseSize, param); 1326 if (result) break; 1327 1328 modentry.dwSize = sizeof(MODULEENTRY32) ; 1329 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0; 1330 } 1331 1332 CloseHandle(hSnapShot); 1333 return result; 1334} 1335 1336int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) 1337{ 1338 // Get current process ID if caller doesn't provide it. 1339 if (!pid) pid = os::current_process_id(); 1340 1341 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); 1342 else return _enumerate_modules_windows(pid, func, param); 1343} 1344 1345struct _modinfo { 1346 address addr; 1347 char* full_path; // point to a char buffer 1348 int buflen; // size of the buffer 1349 address base_addr; 1350}; 1351 1352static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, 1353 unsigned size, void * param) { 1354 struct _modinfo *pmod = (struct _modinfo *)param; 1355 if (!pmod) return -1; 1356 1357 if (base_addr <= pmod->addr && 1358 base_addr+size > pmod->addr) { 1359 // if a buffer is provided, copy path name to the buffer 1360 if (pmod->full_path) { 1361 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); 1362 } 1363 pmod->base_addr = base_addr; 1364 return 1; 1365 } 1366 return 0; 1367} 1368 1369bool os::dll_address_to_library_name(address addr, char* buf, 1370 int buflen, int* offset) { 1371// NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always 1372// return the full path to the DLL file, sometimes it returns path 1373// to the corresponding PDB file (debug info); sometimes it only 1374// returns partial path, which makes life painful. 1375 1376 struct _modinfo mi; 1377 mi.addr = addr; 1378 mi.full_path = buf; 1379 mi.buflen = buflen; 1380 int pid = os::current_process_id(); 1381 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { 1382 // buf already contains path name 1383 if (offset) *offset = addr - mi.base_addr; 1384 return true; 1385 } else { 1386 if (buf) buf[0] = '\0'; 1387 if (offset) *offset = -1; 1388 return false; 1389 } 1390} 1391 1392bool os::dll_address_to_function_name(address addr, char *buf, 1393 int buflen, int *offset) { 1394 if (Decoder::decode(addr, buf, buflen, offset)) { 1395 return true; 1396 } 1397 if (offset != NULL) *offset = -1; 1398 if (buf != NULL) buf[0] = '\0'; 1399 return false; 1400} 1401 1402// save the start and end address of jvm.dll into param[0] and param[1] 1403static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, 1404 unsigned size, void * param) { 1405 if (!param) return -1; 1406 1407 if (base_addr <= (address)_locate_jvm_dll && 1408 base_addr+size > (address)_locate_jvm_dll) { 1409 ((address*)param)[0] = base_addr; 1410 ((address*)param)[1] = base_addr + size; 1411 return 1; 1412 } 1413 return 0; 1414} 1415 1416address vm_lib_location[2]; // start and end address of jvm.dll 1417 1418// check if addr is inside jvm.dll 1419bool os::address_is_in_vm(address addr) { 1420 if (!vm_lib_location[0] || !vm_lib_location[1]) { 1421 int pid = os::current_process_id(); 1422 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { 1423 assert(false, "Can't find jvm module."); 1424 return false; 1425 } 1426 } 1427 1428 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); 1429} 1430 1431// print module info; param is outputStream* 1432static int _print_module(int pid, char* fname, address base, 1433 unsigned size, void* param) { 1434 if (!param) return -1; 1435 1436 outputStream* st = (outputStream*)param; 1437 1438 address end_addr = base + size; 1439 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); 1440 return 0; 1441} 1442 1443// Loads .dll/.so and 1444// in case of error it checks if .dll/.so was built for the 1445// same architecture as Hotspot is running on 1446void * os::dll_load(const char *name, char *ebuf, int ebuflen) 1447{ 1448 void * result = LoadLibrary(name); 1449 if (result != NULL) 1450 { 1451 return result; 1452 } 1453 1454 DWORD errcode = GetLastError(); 1455 if (errcode == ERROR_MOD_NOT_FOUND) { 1456 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); 1457 ebuf[ebuflen-1]='\0'; 1458 return NULL; 1459 } 1460 1461 // Parsing dll below 1462 // If we can read dll-info and find that dll was built 1463 // for an architecture other than Hotspot is running in 1464 // - then print to buffer "DLL was built for a different architecture" 1465 // else call os::lasterror to obtain system error message 1466 1467 // Read system error message into ebuf 1468 // It may or may not be overwritten below (in the for loop and just above) 1469 lasterror(ebuf, (size_t) ebuflen); 1470 ebuf[ebuflen-1]='\0'; 1471 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); 1472 if (file_descriptor<0) 1473 { 1474 return NULL; 1475 } 1476 1477 uint32_t signature_offset; 1478 uint16_t lib_arch=0; 1479 bool failed_to_get_lib_arch= 1480 ( 1481 //Go to position 3c in the dll 1482 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) 1483 || 1484 // Read loacation of signature 1485 (sizeof(signature_offset)!= 1486 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) 1487 || 1488 //Go to COFF File Header in dll 1489 //that is located after"signature" (4 bytes long) 1490 (os::seek_to_file_offset(file_descriptor, 1491 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) 1492 || 1493 //Read field that contains code of architecture 1494 // that dll was build for 1495 (sizeof(lib_arch)!= 1496 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) 1497 ); 1498 1499 ::close(file_descriptor); 1500 if (failed_to_get_lib_arch) 1501 { 1502 // file i/o error - report os::lasterror(...) msg 1503 return NULL; 1504 } 1505 1506 typedef struct 1507 { 1508 uint16_t arch_code; 1509 char* arch_name; 1510 } arch_t; 1511 1512 static const arch_t arch_array[]={ 1513 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, 1514 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, 1515 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} 1516 }; 1517 #if (defined _M_IA64) 1518 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; 1519 #elif (defined _M_AMD64) 1520 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; 1521 #elif (defined _M_IX86) 1522 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; 1523 #else 1524 #error Method os::dll_load requires that one of following \ 1525 is defined :_M_IA64,_M_AMD64 or _M_IX86 1526 #endif 1527 1528 1529 // Obtain a string for printf operation 1530 // lib_arch_str shall contain string what platform this .dll was built for 1531 // running_arch_str shall string contain what platform Hotspot was built for 1532 char *running_arch_str=NULL,*lib_arch_str=NULL; 1533 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) 1534 { 1535 if (lib_arch==arch_array[i].arch_code) 1536 lib_arch_str=arch_array[i].arch_name; 1537 if (running_arch==arch_array[i].arch_code) 1538 running_arch_str=arch_array[i].arch_name; 1539 } 1540 1541 assert(running_arch_str, 1542 "Didn't find runing architecture code in arch_array"); 1543 1544 // If the architure is right 1545 // but some other error took place - report os::lasterror(...) msg 1546 if (lib_arch == running_arch) 1547 { 1548 return NULL; 1549 } 1550 1551 if (lib_arch_str!=NULL) 1552 { 1553 ::_snprintf(ebuf, ebuflen-1, 1554 "Can't load %s-bit .dll on a %s-bit platform", 1555 lib_arch_str,running_arch_str); 1556 } 1557 else 1558 { 1559 // don't know what architecture this dll was build for 1560 ::_snprintf(ebuf, ebuflen-1, 1561 "Can't load this .dll (machine code=0x%x) on a %s-bit platform", 1562 lib_arch,running_arch_str); 1563 } 1564 1565 return NULL; 1566} 1567 1568 1569void os::print_dll_info(outputStream *st) { 1570 int pid = os::current_process_id(); 1571 st->print_cr("Dynamic libraries:"); 1572 enumerate_modules(pid, _print_module, (void *)st); 1573} 1574 1575void os::print_os_info(outputStream* st) { 1576 st->print("OS:"); 1577 1578 OSVERSIONINFOEX osvi; 1579 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); 1580 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 1581 1582 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { 1583 st->print_cr("N/A"); 1584 return; 1585 } 1586 1587 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; 1588 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { 1589 switch (os_vers) { 1590 case 3051: st->print(" Windows NT 3.51"); break; 1591 case 4000: st->print(" Windows NT 4.0"); break; 1592 case 5000: st->print(" Windows 2000"); break; 1593 case 5001: st->print(" Windows XP"); break; 1594 case 5002: 1595 case 6000: 1596 case 6001: { 1597 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could 1598 // find out whether we are running on 64 bit processor or not. 1599 SYSTEM_INFO si; 1600 ZeroMemory(&si, sizeof(SYSTEM_INFO)); 1601 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){ 1602 GetSystemInfo(&si); 1603 } else { 1604 os::Kernel32Dll::GetNativeSystemInfo(&si); 1605 } 1606 if (os_vers == 5002) { 1607 if (osvi.wProductType == VER_NT_WORKSTATION && 1608 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1609 st->print(" Windows XP x64 Edition"); 1610 else 1611 st->print(" Windows Server 2003 family"); 1612 } else if (os_vers == 6000) { 1613 if (osvi.wProductType == VER_NT_WORKSTATION) 1614 st->print(" Windows Vista"); 1615 else 1616 st->print(" Windows Server 2008"); 1617 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1618 st->print(" , 64 bit"); 1619 } else if (os_vers == 6001) { 1620 if (osvi.wProductType == VER_NT_WORKSTATION) { 1621 st->print(" Windows 7"); 1622 } else { 1623 // Unrecognized windows, print out its major and minor versions 1624 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1625 } 1626 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1627 st->print(" , 64 bit"); 1628 } else { // future os 1629 // Unrecognized windows, print out its major and minor versions 1630 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1631 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1632 st->print(" , 64 bit"); 1633 } 1634 break; 1635 } 1636 default: // future windows, print out its major and minor versions 1637 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1638 } 1639 } else { 1640 switch (os_vers) { 1641 case 4000: st->print(" Windows 95"); break; 1642 case 4010: st->print(" Windows 98"); break; 1643 case 4090: st->print(" Windows Me"); break; 1644 default: // future windows, print out its major and minor versions 1645 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1646 } 1647 } 1648 st->print(" Build %d", osvi.dwBuildNumber); 1649 st->print(" %s", osvi.szCSDVersion); // service pack 1650 st->cr(); 1651} 1652 1653void os::pd_print_cpu_info(outputStream* st) { 1654 // Nothing to do for now. 1655} 1656 1657void os::print_memory_info(outputStream* st) { 1658 st->print("Memory:"); 1659 st->print(" %dk page", os::vm_page_size()>>10); 1660 1661 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 1662 // value if total memory is larger than 4GB 1663 MEMORYSTATUSEX ms; 1664 ms.dwLength = sizeof(ms); 1665 GlobalMemoryStatusEx(&ms); 1666 1667 st->print(", physical %uk", os::physical_memory() >> 10); 1668 st->print("(%uk free)", os::available_memory() >> 10); 1669 1670 st->print(", swap %uk", ms.ullTotalPageFile >> 10); 1671 st->print("(%uk free)", ms.ullAvailPageFile >> 10); 1672 st->cr(); 1673} 1674 1675void os::print_siginfo(outputStream *st, void *siginfo) { 1676 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; 1677 st->print("siginfo:"); 1678 st->print(" ExceptionCode=0x%x", er->ExceptionCode); 1679 1680 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 1681 er->NumberParameters >= 2) { 1682 switch (er->ExceptionInformation[0]) { 1683 case 0: st->print(", reading address"); break; 1684 case 1: st->print(", writing address"); break; 1685 default: st->print(", ExceptionInformation=" INTPTR_FORMAT, 1686 er->ExceptionInformation[0]); 1687 } 1688 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); 1689 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && 1690 er->NumberParameters >= 2 && UseSharedSpaces) { 1691 FileMapInfo* mapinfo = FileMapInfo::current_info(); 1692 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { 1693 st->print("\n\nError accessing class data sharing archive." \ 1694 " Mapped file inaccessible during execution, " \ 1695 " possible disk/network problem."); 1696 } 1697 } else { 1698 int num = er->NumberParameters; 1699 if (num > 0) { 1700 st->print(", ExceptionInformation="); 1701 for (int i = 0; i < num; i++) { 1702 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); 1703 } 1704 } 1705 } 1706 st->cr(); 1707} 1708 1709void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 1710 // do nothing 1711} 1712 1713static char saved_jvm_path[MAX_PATH] = {0}; 1714 1715// Find the full path to the current module, jvm.dll or jvm_g.dll 1716void os::jvm_path(char *buf, jint buflen) { 1717 // Error checking. 1718 if (buflen < MAX_PATH) { 1719 assert(false, "must use a large-enough buffer"); 1720 buf[0] = '\0'; 1721 return; 1722 } 1723 // Lazy resolve the path to current module. 1724 if (saved_jvm_path[0] != 0) { 1725 strcpy(buf, saved_jvm_path); 1726 return; 1727 } 1728 1729 buf[0] = '\0'; 1730 if (Arguments::created_by_gamma_launcher()) { 1731 // Support for the gamma launcher. Check for an 1732 // JAVA_HOME environment variable 1733 // and fix up the path so it looks like 1734 // libjvm.so is installed there (append a fake suffix 1735 // hotspot/libjvm.so). 1736 char* java_home_var = ::getenv("JAVA_HOME"); 1737 if (java_home_var != NULL && java_home_var[0] != 0) { 1738 1739 strncpy(buf, java_home_var, buflen); 1740 1741 // determine if this is a legacy image or modules image 1742 // modules image doesn't have "jre" subdirectory 1743 size_t len = strlen(buf); 1744 char* jrebin_p = buf + len; 1745 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\"); 1746 if (0 != _access(buf, 0)) { 1747 jio_snprintf(jrebin_p, buflen-len, "\\bin\\"); 1748 } 1749 len = strlen(buf); 1750 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll"); 1751 } 1752 } 1753 1754 if(buf[0] == '\0') { 1755 GetModuleFileName(vm_lib_handle, buf, buflen); 1756 } 1757 strcpy(saved_jvm_path, buf); 1758} 1759 1760 1761void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 1762#ifndef _WIN64 1763 st->print("_"); 1764#endif 1765} 1766 1767 1768void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 1769#ifndef _WIN64 1770 st->print("@%d", args_size * sizeof(int)); 1771#endif 1772} 1773 1774// This method is a copy of JDK's sysGetLastErrorString 1775// from src/windows/hpi/src/system_md.c 1776 1777size_t os::lasterror(char* buf, size_t len) { 1778 DWORD errval; 1779 1780 if ((errval = GetLastError()) != 0) { 1781 // DOS error 1782 size_t n = (size_t)FormatMessage( 1783 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, 1784 NULL, 1785 errval, 1786 0, 1787 buf, 1788 (DWORD)len, 1789 NULL); 1790 if (n > 3) { 1791 // Drop final '.', CR, LF 1792 if (buf[n - 1] == '\n') n--; 1793 if (buf[n - 1] == '\r') n--; 1794 if (buf[n - 1] == '.') n--; 1795 buf[n] = '\0'; 1796 } 1797 return n; 1798 } 1799 1800 if (errno != 0) { 1801 // C runtime error that has no corresponding DOS error code 1802 const char* s = strerror(errno); 1803 size_t n = strlen(s); 1804 if (n >= len) n = len - 1; 1805 strncpy(buf, s, n); 1806 buf[n] = '\0'; 1807 return n; 1808 } 1809 1810 return 0; 1811} 1812 1813int os::get_last_error() { 1814 DWORD error = GetLastError(); 1815 if (error == 0) 1816 error = errno; 1817 return (int)error; 1818} 1819 1820// sun.misc.Signal 1821// NOTE that this is a workaround for an apparent kernel bug where if 1822// a signal handler for SIGBREAK is installed then that signal handler 1823// takes priority over the console control handler for CTRL_CLOSE_EVENT. 1824// See bug 4416763. 1825static void (*sigbreakHandler)(int) = NULL; 1826 1827static void UserHandler(int sig, void *siginfo, void *context) { 1828 os::signal_notify(sig); 1829 // We need to reinstate the signal handler each time... 1830 os::signal(sig, (void*)UserHandler); 1831} 1832 1833void* os::user_handler() { 1834 return (void*) UserHandler; 1835} 1836 1837void* os::signal(int signal_number, void* handler) { 1838 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { 1839 void (*oldHandler)(int) = sigbreakHandler; 1840 sigbreakHandler = (void (*)(int)) handler; 1841 return (void*) oldHandler; 1842 } else { 1843 return (void*)::signal(signal_number, (void (*)(int))handler); 1844 } 1845} 1846 1847void os::signal_raise(int signal_number) { 1848 raise(signal_number); 1849} 1850 1851// The Win32 C runtime library maps all console control events other than ^C 1852// into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, 1853// logoff, and shutdown events. We therefore install our own console handler 1854// that raises SIGTERM for the latter cases. 1855// 1856static BOOL WINAPI consoleHandler(DWORD event) { 1857 switch(event) { 1858 case CTRL_C_EVENT: 1859 if (is_error_reported()) { 1860 // Ctrl-C is pressed during error reporting, likely because the error 1861 // handler fails to abort. Let VM die immediately. 1862 os::die(); 1863 } 1864 1865 os::signal_raise(SIGINT); 1866 return TRUE; 1867 break; 1868 case CTRL_BREAK_EVENT: 1869 if (sigbreakHandler != NULL) { 1870 (*sigbreakHandler)(SIGBREAK); 1871 } 1872 return TRUE; 1873 break; 1874 case CTRL_CLOSE_EVENT: 1875 case CTRL_LOGOFF_EVENT: 1876 case CTRL_SHUTDOWN_EVENT: 1877 os::signal_raise(SIGTERM); 1878 return TRUE; 1879 break; 1880 default: 1881 break; 1882 } 1883 return FALSE; 1884} 1885 1886/* 1887 * The following code is moved from os.cpp for making this 1888 * code platform specific, which it is by its very nature. 1889 */ 1890 1891// Return maximum OS signal used + 1 for internal use only 1892// Used as exit signal for signal_thread 1893int os::sigexitnum_pd(){ 1894 return NSIG; 1895} 1896 1897// a counter for each possible signal value, including signal_thread exit signal 1898static volatile jint pending_signals[NSIG+1] = { 0 }; 1899static HANDLE sig_sem; 1900 1901void os::signal_init_pd() { 1902 // Initialize signal structures 1903 memset((void*)pending_signals, 0, sizeof(pending_signals)); 1904 1905 sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); 1906 1907 // Programs embedding the VM do not want it to attempt to receive 1908 // events like CTRL_LOGOFF_EVENT, which are used to implement the 1909 // shutdown hooks mechanism introduced in 1.3. For example, when 1910 // the VM is run as part of a Windows NT service (i.e., a servlet 1911 // engine in a web server), the correct behavior is for any console 1912 // control handler to return FALSE, not TRUE, because the OS's 1913 // "final" handler for such events allows the process to continue if 1914 // it is a service (while terminating it if it is not a service). 1915 // To make this behavior uniform and the mechanism simpler, we 1916 // completely disable the VM's usage of these console events if -Xrs 1917 // (=ReduceSignalUsage) is specified. This means, for example, that 1918 // the CTRL-BREAK thread dump mechanism is also disabled in this 1919 // case. See bugs 4323062, 4345157, and related bugs. 1920 1921 if (!ReduceSignalUsage) { 1922 // Add a CTRL-C handler 1923 SetConsoleCtrlHandler(consoleHandler, TRUE); 1924 } 1925} 1926 1927void os::signal_notify(int signal_number) { 1928 BOOL ret; 1929 1930 Atomic::inc(&pending_signals[signal_number]); 1931 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); 1932 assert(ret != 0, "ReleaseSemaphore() failed"); 1933} 1934 1935static int check_pending_signals(bool wait_for_signal) { 1936 DWORD ret; 1937 while (true) { 1938 for (int i = 0; i < NSIG + 1; i++) { 1939 jint n = pending_signals[i]; 1940 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 1941 return i; 1942 } 1943 } 1944 if (!wait_for_signal) { 1945 return -1; 1946 } 1947 1948 JavaThread *thread = JavaThread::current(); 1949 1950 ThreadBlockInVM tbivm(thread); 1951 1952 bool threadIsSuspended; 1953 do { 1954 thread->set_suspend_equivalent(); 1955 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 1956 ret = ::WaitForSingleObject(sig_sem, INFINITE); 1957 assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); 1958 1959 // were we externally suspended while we were waiting? 1960 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 1961 if (threadIsSuspended) { 1962 // 1963 // The semaphore has been incremented, but while we were waiting 1964 // another thread suspended us. We don't want to continue running 1965 // while suspended because that would surprise the thread that 1966 // suspended us. 1967 // 1968 ret = ::ReleaseSemaphore(sig_sem, 1, NULL); 1969 assert(ret != 0, "ReleaseSemaphore() failed"); 1970 1971 thread->java_suspend_self(); 1972 } 1973 } while (threadIsSuspended); 1974 } 1975} 1976 1977int os::signal_lookup() { 1978 return check_pending_signals(false); 1979} 1980 1981int os::signal_wait() { 1982 return check_pending_signals(true); 1983} 1984 1985// Implicit OS exception handling 1986 1987LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { 1988 JavaThread* thread = JavaThread::current(); 1989 // Save pc in thread 1990#ifdef _M_IA64 1991 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); 1992 // Set pc to handler 1993 exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; 1994#elif _M_AMD64 1995 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); 1996 // Set pc to handler 1997 exceptionInfo->ContextRecord->Rip = (DWORD64)handler; 1998#else 1999 thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); 2000 // Set pc to handler 2001 exceptionInfo->ContextRecord->Eip = (LONG)handler; 2002#endif 2003 2004 // Continue the execution 2005 return EXCEPTION_CONTINUE_EXECUTION; 2006} 2007 2008 2009// Used for PostMortemDump 2010extern "C" void safepoints(); 2011extern "C" void find(int x); 2012extern "C" void events(); 2013 2014// According to Windows API documentation, an illegal instruction sequence should generate 2015// the 0xC000001C exception code. However, real world experience shows that occasionnaly 2016// the execution of an illegal instruction can generate the exception code 0xC000001E. This 2017// seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). 2018 2019#define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E 2020 2021// From "Execution Protection in the Windows Operating System" draft 0.35 2022// Once a system header becomes available, the "real" define should be 2023// included or copied here. 2024#define EXCEPTION_INFO_EXEC_VIOLATION 0x08 2025 2026#define def_excpt(val) #val, val 2027 2028struct siglabel { 2029 char *name; 2030 int number; 2031}; 2032 2033// All Visual C++ exceptions thrown from code generated by the Microsoft Visual 2034// C++ compiler contain this error code. Because this is a compiler-generated 2035// error, the code is not listed in the Win32 API header files. 2036// The code is actually a cryptic mnemonic device, with the initial "E" 2037// standing for "exception" and the final 3 bytes (0x6D7363) representing the 2038// ASCII values of "msc". 2039 2040#define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363 2041 2042 2043struct siglabel exceptlabels[] = { 2044 def_excpt(EXCEPTION_ACCESS_VIOLATION), 2045 def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), 2046 def_excpt(EXCEPTION_BREAKPOINT), 2047 def_excpt(EXCEPTION_SINGLE_STEP), 2048 def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), 2049 def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), 2050 def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), 2051 def_excpt(EXCEPTION_FLT_INEXACT_RESULT), 2052 def_excpt(EXCEPTION_FLT_INVALID_OPERATION), 2053 def_excpt(EXCEPTION_FLT_OVERFLOW), 2054 def_excpt(EXCEPTION_FLT_STACK_CHECK), 2055 def_excpt(EXCEPTION_FLT_UNDERFLOW), 2056 def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), 2057 def_excpt(EXCEPTION_INT_OVERFLOW), 2058 def_excpt(EXCEPTION_PRIV_INSTRUCTION), 2059 def_excpt(EXCEPTION_IN_PAGE_ERROR), 2060 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), 2061 def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), 2062 def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), 2063 def_excpt(EXCEPTION_STACK_OVERFLOW), 2064 def_excpt(EXCEPTION_INVALID_DISPOSITION), 2065 def_excpt(EXCEPTION_GUARD_PAGE), 2066 def_excpt(EXCEPTION_INVALID_HANDLE), 2067 def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION), 2068 NULL, 0 2069}; 2070 2071const char* os::exception_name(int exception_code, char *buf, size_t size) { 2072 for (int i = 0; exceptlabels[i].name != NULL; i++) { 2073 if (exceptlabels[i].number == exception_code) { 2074 jio_snprintf(buf, size, "%s", exceptlabels[i].name); 2075 return buf; 2076 } 2077 } 2078 2079 return NULL; 2080} 2081 2082//----------------------------------------------------------------------------- 2083LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { 2084 // handle exception caused by idiv; should only happen for -MinInt/-1 2085 // (division by zero is handled explicitly) 2086#ifdef _M_IA64 2087 assert(0, "Fix Handle_IDiv_Exception"); 2088#elif _M_AMD64 2089 PCONTEXT ctx = exceptionInfo->ContextRecord; 2090 address pc = (address)ctx->Rip; 2091 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); 2092 assert(pc[0] == 0xF7, "not an idiv opcode"); 2093 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2094 assert(ctx->Rax == min_jint, "unexpected idiv exception"); 2095 // set correct result values and continue after idiv instruction 2096 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2097 ctx->Rax = (DWORD)min_jint; // result 2098 ctx->Rdx = (DWORD)0; // remainder 2099 // Continue the execution 2100#else 2101 PCONTEXT ctx = exceptionInfo->ContextRecord; 2102 address pc = (address)ctx->Eip; 2103 NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); 2104 assert(pc[0] == 0xF7, "not an idiv opcode"); 2105 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2106 assert(ctx->Eax == min_jint, "unexpected idiv exception"); 2107 // set correct result values and continue after idiv instruction 2108 ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2109 ctx->Eax = (DWORD)min_jint; // result 2110 ctx->Edx = (DWORD)0; // remainder 2111 // Continue the execution 2112#endif 2113 return EXCEPTION_CONTINUE_EXECUTION; 2114} 2115 2116#ifndef _WIN64 2117//----------------------------------------------------------------------------- 2118LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { 2119 // handle exception caused by native method modifying control word 2120 PCONTEXT ctx = exceptionInfo->ContextRecord; 2121 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2122 2123 switch (exception_code) { 2124 case EXCEPTION_FLT_DENORMAL_OPERAND: 2125 case EXCEPTION_FLT_DIVIDE_BY_ZERO: 2126 case EXCEPTION_FLT_INEXACT_RESULT: 2127 case EXCEPTION_FLT_INVALID_OPERATION: 2128 case EXCEPTION_FLT_OVERFLOW: 2129 case EXCEPTION_FLT_STACK_CHECK: 2130 case EXCEPTION_FLT_UNDERFLOW: 2131 jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); 2132 if (fp_control_word != ctx->FloatSave.ControlWord) { 2133 // Restore FPCW and mask out FLT exceptions 2134 ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; 2135 // Mask out pending FLT exceptions 2136 ctx->FloatSave.StatusWord &= 0xffffff00; 2137 return EXCEPTION_CONTINUE_EXECUTION; 2138 } 2139 } 2140 2141 if (prev_uef_handler != NULL) { 2142 // We didn't handle this exception so pass it to the previous 2143 // UnhandledExceptionFilter. 2144 return (prev_uef_handler)(exceptionInfo); 2145 } 2146 2147 return EXCEPTION_CONTINUE_SEARCH; 2148} 2149#else //_WIN64 2150/* 2151 On Windows, the mxcsr control bits are non-volatile across calls 2152 See also CR 6192333 2153 If EXCEPTION_FLT_* happened after some native method modified 2154 mxcsr - it is not a jvm fault. 2155 However should we decide to restore of mxcsr after a faulty 2156 native method we can uncomment following code 2157 jint MxCsr = INITIAL_MXCSR; 2158 // we can't use StubRoutines::addr_mxcsr_std() 2159 // because in Win64 mxcsr is not saved there 2160 if (MxCsr != ctx->MxCsr) { 2161 ctx->MxCsr = MxCsr; 2162 return EXCEPTION_CONTINUE_EXECUTION; 2163 } 2164 2165*/ 2166#endif //_WIN64 2167 2168 2169// Fatal error reporting is single threaded so we can make this a 2170// static and preallocated. If it's more than MAX_PATH silently ignore 2171// it. 2172static char saved_error_file[MAX_PATH] = {0}; 2173 2174void os::set_error_file(const char *logfile) { 2175 if (strlen(logfile) <= MAX_PATH) { 2176 strncpy(saved_error_file, logfile, MAX_PATH); 2177 } 2178} 2179 2180static inline void report_error(Thread* t, DWORD exception_code, 2181 address addr, void* siginfo, void* context) { 2182 VMError err(t, exception_code, addr, siginfo, context); 2183 err.report_and_die(); 2184 2185 // If UseOsErrorReporting, this will return here and save the error file 2186 // somewhere where we can find it in the minidump. 2187} 2188 2189//----------------------------------------------------------------------------- 2190LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { 2191 if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; 2192 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2193#ifdef _M_IA64 2194 address pc = (address) exceptionInfo->ContextRecord->StIIP; 2195#elif _M_AMD64 2196 address pc = (address) exceptionInfo->ContextRecord->Rip; 2197#else 2198 address pc = (address) exceptionInfo->ContextRecord->Eip; 2199#endif 2200 Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady 2201 2202#ifndef _WIN64 2203 // Execution protection violation - win32 running on AMD64 only 2204 // Handled first to avoid misdiagnosis as a "normal" access violation; 2205 // This is safe to do because we have a new/unique ExceptionInformation 2206 // code for this condition. 2207 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2208 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2209 int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; 2210 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2211 2212 if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { 2213 int page_size = os::vm_page_size(); 2214 2215 // Make sure the pc and the faulting address are sane. 2216 // 2217 // If an instruction spans a page boundary, and the page containing 2218 // the beginning of the instruction is executable but the following 2219 // page is not, the pc and the faulting address might be slightly 2220 // different - we still want to unguard the 2nd page in this case. 2221 // 2222 // 15 bytes seems to be a (very) safe value for max instruction size. 2223 bool pc_is_near_addr = 2224 (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); 2225 bool instr_spans_page_boundary = 2226 (align_size_down((intptr_t) pc ^ (intptr_t) addr, 2227 (intptr_t) page_size) > 0); 2228 2229 if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { 2230 static volatile address last_addr = 2231 (address) os::non_memory_address_word(); 2232 2233 // In conservative mode, don't unguard unless the address is in the VM 2234 if (UnguardOnExecutionViolation > 0 && addr != last_addr && 2235 (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { 2236 2237 // Set memory to RWX and retry 2238 address page_start = 2239 (address) align_size_down((intptr_t) addr, (intptr_t) page_size); 2240 bool res = os::protect_memory((char*) page_start, page_size, 2241 os::MEM_PROT_RWX); 2242 2243 if (PrintMiscellaneous && Verbose) { 2244 char buf[256]; 2245 jio_snprintf(buf, sizeof(buf), "Execution protection violation " 2246 "at " INTPTR_FORMAT 2247 ", unguarding " INTPTR_FORMAT ": %s", addr, 2248 page_start, (res ? "success" : strerror(errno))); 2249 tty->print_raw_cr(buf); 2250 } 2251 2252 // Set last_addr so if we fault again at the same address, we don't 2253 // end up in an endless loop. 2254 // 2255 // There are two potential complications here. Two threads trapping 2256 // at the same address at the same time could cause one of the 2257 // threads to think it already unguarded, and abort the VM. Likely 2258 // very rare. 2259 // 2260 // The other race involves two threads alternately trapping at 2261 // different addresses and failing to unguard the page, resulting in 2262 // an endless loop. This condition is probably even more unlikely 2263 // than the first. 2264 // 2265 // Although both cases could be avoided by using locks or thread 2266 // local last_addr, these solutions are unnecessary complication: 2267 // this handler is a best-effort safety net, not a complete solution. 2268 // It is disabled by default and should only be used as a workaround 2269 // in case we missed any no-execute-unsafe VM code. 2270 2271 last_addr = addr; 2272 2273 return EXCEPTION_CONTINUE_EXECUTION; 2274 } 2275 } 2276 2277 // Last unguard failed or not unguarding 2278 tty->print_raw_cr("Execution protection violation"); 2279 report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, 2280 exceptionInfo->ContextRecord); 2281 return EXCEPTION_CONTINUE_SEARCH; 2282 } 2283 } 2284#endif // _WIN64 2285 2286 // Check to see if we caught the safepoint code in the 2287 // process of write protecting the memory serialization page. 2288 // It write enables the page immediately after protecting it 2289 // so just return. 2290 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 2291 JavaThread* thread = (JavaThread*) t; 2292 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2293 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2294 if ( os::is_memory_serialize_page(thread, addr) ) { 2295 // Block current thread until the memory serialize page permission restored. 2296 os::block_on_serialize_page_trap(); 2297 return EXCEPTION_CONTINUE_EXECUTION; 2298 } 2299 } 2300 2301 if (t != NULL && t->is_Java_thread()) { 2302 JavaThread* thread = (JavaThread*) t; 2303 bool in_java = thread->thread_state() == _thread_in_Java; 2304 2305 // Handle potential stack overflows up front. 2306 if (exception_code == EXCEPTION_STACK_OVERFLOW) { 2307 if (os::uses_stack_guard_pages()) { 2308#ifdef _M_IA64 2309 // 2310 // If it's a legal stack address continue, Windows will map it in. 2311 // 2312 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2313 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2314 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) 2315 return EXCEPTION_CONTINUE_EXECUTION; 2316 2317 // The register save area is the same size as the memory stack 2318 // and starts at the page just above the start of the memory stack. 2319 // If we get a fault in this area, we've run out of register 2320 // stack. If we are in java, try throwing a stack overflow exception. 2321 if (addr > thread->stack_base() && 2322 addr <= (thread->stack_base()+thread->stack_size()) ) { 2323 char buf[256]; 2324 jio_snprintf(buf, sizeof(buf), 2325 "Register stack overflow, addr:%p, stack_base:%p\n", 2326 addr, thread->stack_base() ); 2327 tty->print_raw_cr(buf); 2328 // If not in java code, return and hope for the best. 2329 return in_java ? Handle_Exception(exceptionInfo, 2330 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) 2331 : EXCEPTION_CONTINUE_EXECUTION; 2332 } 2333#endif 2334 if (thread->stack_yellow_zone_enabled()) { 2335 // Yellow zone violation. The o/s has unprotected the first yellow 2336 // zone page for us. Note: must call disable_stack_yellow_zone to 2337 // update the enabled status, even if the zone contains only one page. 2338 thread->disable_stack_yellow_zone(); 2339 // If not in java code, return and hope for the best. 2340 return in_java ? Handle_Exception(exceptionInfo, 2341 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) 2342 : EXCEPTION_CONTINUE_EXECUTION; 2343 } else { 2344 // Fatal red zone violation. 2345 thread->disable_stack_red_zone(); 2346 tty->print_raw_cr("An unrecoverable stack overflow has occurred."); 2347 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2348 exceptionInfo->ContextRecord); 2349 return EXCEPTION_CONTINUE_SEARCH; 2350 } 2351 } else if (in_java) { 2352 // JVM-managed guard pages cannot be used on win95/98. The o/s provides 2353 // a one-time-only guard page, which it has released to us. The next 2354 // stack overflow on this thread will result in an ACCESS_VIOLATION. 2355 return Handle_Exception(exceptionInfo, 2356 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2357 } else { 2358 // Can only return and hope for the best. Further stack growth will 2359 // result in an ACCESS_VIOLATION. 2360 return EXCEPTION_CONTINUE_EXECUTION; 2361 } 2362 } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2363 // Either stack overflow or null pointer exception. 2364 if (in_java) { 2365 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2366 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2367 address stack_end = thread->stack_base() - thread->stack_size(); 2368 if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { 2369 // Stack overflow. 2370 assert(!os::uses_stack_guard_pages(), 2371 "should be caught by red zone code above."); 2372 return Handle_Exception(exceptionInfo, 2373 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2374 } 2375 // 2376 // Check for safepoint polling and implicit null 2377 // We only expect null pointers in the stubs (vtable) 2378 // the rest are checked explicitly now. 2379 // 2380 CodeBlob* cb = CodeCache::find_blob(pc); 2381 if (cb != NULL) { 2382 if (os::is_poll_address(addr)) { 2383 address stub = SharedRuntime::get_poll_stub(pc); 2384 return Handle_Exception(exceptionInfo, stub); 2385 } 2386 } 2387 { 2388#ifdef _WIN64 2389 // 2390 // If it's a legal stack address map the entire region in 2391 // 2392 PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; 2393 address addr = (address) exceptionRecord->ExceptionInformation[1]; 2394 if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { 2395 addr = (address)((uintptr_t)addr & 2396 (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); 2397 os::commit_memory((char *)addr, thread->stack_base() - addr, 2398 false ); 2399 return EXCEPTION_CONTINUE_EXECUTION; 2400 } 2401 else 2402#endif 2403 { 2404 // Null pointer exception. 2405#ifdef _M_IA64 2406 // We catch register stack overflows in compiled code by doing 2407 // an explicit compare and executing a st8(G0, G0) if the 2408 // BSP enters into our guard area. We test for the overflow 2409 // condition and fall into the normal null pointer exception 2410 // code if BSP hasn't overflowed. 2411 if ( in_java ) { 2412 if(thread->register_stack_overflow()) { 2413 assert((address)exceptionInfo->ContextRecord->IntS3 == 2414 thread->register_stack_limit(), 2415 "GR7 doesn't contain register_stack_limit"); 2416 // Disable the yellow zone which sets the state that 2417 // we've got a stack overflow problem. 2418 if (thread->stack_yellow_zone_enabled()) { 2419 thread->disable_stack_yellow_zone(); 2420 } 2421 // Give us some room to process the exception 2422 thread->disable_register_stack_guard(); 2423 // Update GR7 with the new limit so we can continue running 2424 // compiled code. 2425 exceptionInfo->ContextRecord->IntS3 = 2426 (ULONGLONG)thread->register_stack_limit(); 2427 return Handle_Exception(exceptionInfo, 2428 SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); 2429 } else { 2430 // 2431 // Check for implicit null 2432 // We only expect null pointers in the stubs (vtable) 2433 // the rest are checked explicitly now. 2434 // 2435 if (((uintptr_t)addr) < os::vm_page_size() ) { 2436 // an access to the first page of VM--assume it is a null pointer 2437 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 2438 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); 2439 } 2440 } 2441 } // in_java 2442 2443 // IA64 doesn't use implicit null checking yet. So we shouldn't 2444 // get here. 2445 tty->print_raw_cr("Access violation, possible null pointer exception"); 2446 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2447 exceptionInfo->ContextRecord); 2448 return EXCEPTION_CONTINUE_SEARCH; 2449#else /* !IA64 */ 2450 2451 // Windows 98 reports faulting addresses incorrectly 2452 if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || 2453 !os::win32::is_nt()) { 2454 address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); 2455 if (stub != NULL) return Handle_Exception(exceptionInfo, stub); 2456 } 2457 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2458 exceptionInfo->ContextRecord); 2459 return EXCEPTION_CONTINUE_SEARCH; 2460#endif 2461 } 2462 } 2463 } 2464 2465#ifdef _WIN64 2466 // Special care for fast JNI field accessors. 2467 // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks 2468 // in and the heap gets shrunk before the field access. 2469 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2470 address addr = JNI_FastGetField::find_slowcase_pc(pc); 2471 if (addr != (address)-1) { 2472 return Handle_Exception(exceptionInfo, addr); 2473 } 2474 } 2475#endif 2476 2477#ifdef _WIN64 2478 // Windows will sometimes generate an access violation 2479 // when we call malloc. Since we use VectoredExceptions 2480 // on 64 bit platforms, we see this exception. We must 2481 // pass this exception on so Windows can recover. 2482 // We check to see if the pc of the fault is in NTDLL.DLL 2483 // if so, we pass control on to Windows for handling. 2484 if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH; 2485#endif 2486 2487 // Stack overflow or null pointer exception in native code. 2488 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2489 exceptionInfo->ContextRecord); 2490 return EXCEPTION_CONTINUE_SEARCH; 2491 } 2492 2493 if (in_java) { 2494 switch (exception_code) { 2495 case EXCEPTION_INT_DIVIDE_BY_ZERO: 2496 return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); 2497 2498 case EXCEPTION_INT_OVERFLOW: 2499 return Handle_IDiv_Exception(exceptionInfo); 2500 2501 } // switch 2502 } 2503#ifndef _WIN64 2504 if (((thread->thread_state() == _thread_in_Java) || 2505 (thread->thread_state() == _thread_in_native)) && 2506 exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION) 2507 { 2508 LONG result=Handle_FLT_Exception(exceptionInfo); 2509 if (result==EXCEPTION_CONTINUE_EXECUTION) return result; 2510 } 2511#endif //_WIN64 2512 } 2513 2514 if (exception_code != EXCEPTION_BREAKPOINT) { 2515#ifndef _WIN64 2516 report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2517 exceptionInfo->ContextRecord); 2518#else 2519 // Itanium Windows uses a VectoredExceptionHandler 2520 // Which means that C++ programatic exception handlers (try/except) 2521 // will get here. Continue the search for the right except block if 2522 // the exception code is not a fatal code. 2523 switch ( exception_code ) { 2524 case EXCEPTION_ACCESS_VIOLATION: 2525 case EXCEPTION_STACK_OVERFLOW: 2526 case EXCEPTION_ILLEGAL_INSTRUCTION: 2527 case EXCEPTION_ILLEGAL_INSTRUCTION_2: 2528 case EXCEPTION_INT_OVERFLOW: 2529 case EXCEPTION_INT_DIVIDE_BY_ZERO: 2530 case EXCEPTION_UNCAUGHT_CXX_EXCEPTION: 2531 { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, 2532 exceptionInfo->ContextRecord); 2533 } 2534 break; 2535 default: 2536 break; 2537 } 2538#endif 2539 } 2540 return EXCEPTION_CONTINUE_SEARCH; 2541} 2542 2543#ifndef _WIN64 2544// Special care for fast JNI accessors. 2545// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and 2546// the heap gets shrunk before the field access. 2547// Need to install our own structured exception handler since native code may 2548// install its own. 2549LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { 2550 DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; 2551 if (exception_code == EXCEPTION_ACCESS_VIOLATION) { 2552 address pc = (address) exceptionInfo->ContextRecord->Eip; 2553 address addr = JNI_FastGetField::find_slowcase_pc(pc); 2554 if (addr != (address)-1) { 2555 return Handle_Exception(exceptionInfo, addr); 2556 } 2557 } 2558 return EXCEPTION_CONTINUE_SEARCH; 2559} 2560 2561#define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ 2562Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ 2563 __try { \ 2564 return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ 2565 } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ 2566 } \ 2567 return 0; \ 2568} 2569 2570DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) 2571DEFINE_FAST_GETFIELD(jbyte, byte, Byte) 2572DEFINE_FAST_GETFIELD(jchar, char, Char) 2573DEFINE_FAST_GETFIELD(jshort, short, Short) 2574DEFINE_FAST_GETFIELD(jint, int, Int) 2575DEFINE_FAST_GETFIELD(jlong, long, Long) 2576DEFINE_FAST_GETFIELD(jfloat, float, Float) 2577DEFINE_FAST_GETFIELD(jdouble, double, Double) 2578 2579address os::win32::fast_jni_accessor_wrapper(BasicType type) { 2580 switch (type) { 2581 case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; 2582 case T_BYTE: return (address)jni_fast_GetByteField_wrapper; 2583 case T_CHAR: return (address)jni_fast_GetCharField_wrapper; 2584 case T_SHORT: return (address)jni_fast_GetShortField_wrapper; 2585 case T_INT: return (address)jni_fast_GetIntField_wrapper; 2586 case T_LONG: return (address)jni_fast_GetLongField_wrapper; 2587 case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; 2588 case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; 2589 default: ShouldNotReachHere(); 2590 } 2591 return (address)-1; 2592} 2593#endif 2594 2595// Virtual Memory 2596 2597int os::vm_page_size() { return os::win32::vm_page_size(); } 2598int os::vm_allocation_granularity() { 2599 return os::win32::vm_allocation_granularity(); 2600} 2601 2602// Windows large page support is available on Windows 2003. In order to use 2603// large page memory, the administrator must first assign additional privilege 2604// to the user: 2605// + select Control Panel -> Administrative Tools -> Local Security Policy 2606// + select Local Policies -> User Rights Assignment 2607// + double click "Lock pages in memory", add users and/or groups 2608// + reboot 2609// Note the above steps are needed for administrator as well, as administrators 2610// by default do not have the privilege to lock pages in memory. 2611// 2612// Note about Windows 2003: although the API supports committing large page 2613// memory on a page-by-page basis and VirtualAlloc() returns success under this 2614// scenario, I found through experiment it only uses large page if the entire 2615// memory region is reserved and committed in a single VirtualAlloc() call. 2616// This makes Windows large page support more or less like Solaris ISM, in 2617// that the entire heap must be committed upfront. This probably will change 2618// in the future, if so the code below needs to be revisited. 2619 2620#ifndef MEM_LARGE_PAGES 2621#define MEM_LARGE_PAGES 0x20000000 2622#endif 2623 2624static HANDLE _hProcess; 2625static HANDLE _hToken; 2626 2627// Container for NUMA node list info 2628class NUMANodeListHolder { 2629private: 2630 int *_numa_used_node_list; // allocated below 2631 int _numa_used_node_count; 2632 2633 void free_node_list() { 2634 if (_numa_used_node_list != NULL) { 2635 FREE_C_HEAP_ARRAY(int, _numa_used_node_list); 2636 } 2637 } 2638 2639public: 2640 NUMANodeListHolder() { 2641 _numa_used_node_count = 0; 2642 _numa_used_node_list = NULL; 2643 // do rest of initialization in build routine (after function pointers are set up) 2644 } 2645 2646 ~NUMANodeListHolder() { 2647 free_node_list(); 2648 } 2649 2650 bool build() { 2651 DWORD_PTR proc_aff_mask; 2652 DWORD_PTR sys_aff_mask; 2653 if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false; 2654 ULONG highest_node_number; 2655 if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false; 2656 free_node_list(); 2657 _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1); 2658 for (unsigned int i = 0; i <= highest_node_number; i++) { 2659 ULONGLONG proc_mask_numa_node; 2660 if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false; 2661 if ((proc_aff_mask & proc_mask_numa_node)!=0) { 2662 _numa_used_node_list[_numa_used_node_count++] = i; 2663 } 2664 } 2665 return (_numa_used_node_count > 1); 2666 } 2667 2668 int get_count() {return _numa_used_node_count;} 2669 int get_node_list_entry(int n) { 2670 // for indexes out of range, returns -1 2671 return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1); 2672 } 2673 2674} numa_node_list_holder; 2675 2676 2677 2678static size_t _large_page_size = 0; 2679 2680static bool resolve_functions_for_large_page_init() { 2681 return os::Kernel32Dll::GetLargePageMinimumAvailable() && 2682 os::Advapi32Dll::AdvapiAvailable(); 2683} 2684 2685static bool request_lock_memory_privilege() { 2686 _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, 2687 os::current_process_id()); 2688 2689 LUID luid; 2690 if (_hProcess != NULL && 2691 os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && 2692 os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { 2693 2694 TOKEN_PRIVILEGES tp; 2695 tp.PrivilegeCount = 1; 2696 tp.Privileges[0].Luid = luid; 2697 tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; 2698 2699 // AdjustTokenPrivileges() may return TRUE even when it couldn't change the 2700 // privilege. Check GetLastError() too. See MSDN document. 2701 if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && 2702 (GetLastError() == ERROR_SUCCESS)) { 2703 return true; 2704 } 2705 } 2706 2707 return false; 2708} 2709 2710static void cleanup_after_large_page_init() { 2711 if (_hProcess) CloseHandle(_hProcess); 2712 _hProcess = NULL; 2713 if (_hToken) CloseHandle(_hToken); 2714 _hToken = NULL; 2715} 2716 2717static bool numa_interleaving_init() { 2718 bool success = false; 2719 bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving); 2720 2721 // print a warning if UseNUMAInterleaving flag is specified on command line 2722 bool warn_on_failure = use_numa_interleaving_specified; 2723# define WARN(msg) if (warn_on_failure) { warning(msg); } 2724 2725 // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages) 2726 size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity(); 2727 NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity); 2728 2729 if (os::Kernel32Dll::NumaCallsAvailable()) { 2730 if (numa_node_list_holder.build()) { 2731 if (PrintMiscellaneous && Verbose) { 2732 tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count()); 2733 for (int i = 0; i < numa_node_list_holder.get_count(); i++) { 2734 tty->print("%d ", numa_node_list_holder.get_node_list_entry(i)); 2735 } 2736 tty->print("\n"); 2737 } 2738 success = true; 2739 } else { 2740 WARN("Process does not cover multiple NUMA nodes."); 2741 } 2742 } else { 2743 WARN("NUMA Interleaving is not supported by the operating system."); 2744 } 2745 if (!success) { 2746 if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag."); 2747 } 2748 return success; 2749#undef WARN 2750} 2751 2752// this routine is used whenever we need to reserve a contiguous VA range 2753// but we need to make separate VirtualAlloc calls for each piece of the range 2754// Reasons for doing this: 2755// * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise) 2756// * UseNUMAInterleaving requires a separate node for each piece 2757static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot, 2758 bool should_inject_error=false) { 2759 char * p_buf; 2760 // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size 2761 size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity(); 2762 size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size; 2763 2764 // first reserve enough address space in advance since we want to be 2765 // able to break a single contiguous virtual address range into multiple 2766 // large page commits but WS2003 does not allow reserving large page space 2767 // so we just use 4K pages for reserve, this gives us a legal contiguous 2768 // address space. then we will deallocate that reservation, and re alloc 2769 // using large pages 2770 const size_t size_of_reserve = bytes + chunk_size; 2771 if (bytes > size_of_reserve) { 2772 // Overflowed. 2773 return NULL; 2774 } 2775 p_buf = (char *) VirtualAlloc(addr, 2776 size_of_reserve, // size of Reserve 2777 MEM_RESERVE, 2778 PAGE_READWRITE); 2779 // If reservation failed, return NULL 2780 if (p_buf == NULL) return NULL; 2781 2782 os::release_memory(p_buf, bytes + chunk_size); 2783 2784 // we still need to round up to a page boundary (in case we are using large pages) 2785 // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size) 2786 // instead we handle this in the bytes_to_rq computation below 2787 p_buf = (char *) align_size_up((size_t)p_buf, page_size); 2788 2789 // now go through and allocate one chunk at a time until all bytes are 2790 // allocated 2791 size_t bytes_remaining = bytes; 2792 // An overflow of align_size_up() would have been caught above 2793 // in the calculation of size_of_reserve. 2794 char * next_alloc_addr = p_buf; 2795 HANDLE hProc = GetCurrentProcess(); 2796 2797#ifdef ASSERT 2798 // Variable for the failure injection 2799 long ran_num = os::random(); 2800 size_t fail_after = ran_num % bytes; 2801#endif 2802 2803 int count=0; 2804 while (bytes_remaining) { 2805 // select bytes_to_rq to get to the next chunk_size boundary 2806 2807 size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size)); 2808 // Note allocate and commit 2809 char * p_new; 2810 2811#ifdef ASSERT 2812 bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after); 2813#else 2814 const bool inject_error_now = false; 2815#endif 2816 2817 if (inject_error_now) { 2818 p_new = NULL; 2819 } else { 2820 if (!UseNUMAInterleaving) { 2821 p_new = (char *) VirtualAlloc(next_alloc_addr, 2822 bytes_to_rq, 2823 flags, 2824 prot); 2825 } else { 2826 // get the next node to use from the used_node_list 2827 assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected"); 2828 DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count()); 2829 p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc, 2830 next_alloc_addr, 2831 bytes_to_rq, 2832 flags, 2833 prot, 2834 node); 2835 } 2836 } 2837 2838 if (p_new == NULL) { 2839 // Free any allocated pages 2840 if (next_alloc_addr > p_buf) { 2841 // Some memory was committed so release it. 2842 size_t bytes_to_release = bytes - bytes_remaining; 2843 os::release_memory(p_buf, bytes_to_release); 2844 } 2845#ifdef ASSERT 2846 if (should_inject_error) { 2847 if (TracePageSizes && Verbose) { 2848 tty->print_cr("Reserving pages individually failed."); 2849 } 2850 } 2851#endif 2852 return NULL; 2853 } 2854 bytes_remaining -= bytes_to_rq; 2855 next_alloc_addr += bytes_to_rq; 2856 count++; 2857 } 2858 // made it this far, success 2859 return p_buf; 2860} 2861 2862 2863 2864void os::large_page_init() { 2865 if (!UseLargePages) return; 2866 2867 // print a warning if any large page related flag is specified on command line 2868 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2869 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2870 bool success = false; 2871 2872# define WARN(msg) if (warn_on_failure) { warning(msg); } 2873 if (resolve_functions_for_large_page_init()) { 2874 if (request_lock_memory_privilege()) { 2875 size_t s = os::Kernel32Dll::GetLargePageMinimum(); 2876 if (s) { 2877#if defined(IA32) || defined(AMD64) 2878 if (s > 4*M || LargePageSizeInBytes > 4*M) { 2879 WARN("JVM cannot use large pages bigger than 4mb."); 2880 } else { 2881#endif 2882 if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { 2883 _large_page_size = LargePageSizeInBytes; 2884 } else { 2885 _large_page_size = s; 2886 } 2887 success = true; 2888#if defined(IA32) || defined(AMD64) 2889 } 2890#endif 2891 } else { 2892 WARN("Large page is not supported by the processor."); 2893 } 2894 } else { 2895 WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); 2896 } 2897 } else { 2898 WARN("Large page is not supported by the operating system."); 2899 } 2900#undef WARN 2901 2902 const size_t default_page_size = (size_t) vm_page_size(); 2903 if (success && _large_page_size > default_page_size) { 2904 _page_sizes[0] = _large_page_size; 2905 _page_sizes[1] = default_page_size; 2906 _page_sizes[2] = 0; 2907 } 2908 2909 cleanup_after_large_page_init(); 2910 UseLargePages = success; 2911} 2912 2913// On win32, one cannot release just a part of reserved memory, it's an 2914// all or nothing deal. When we split a reservation, we must break the 2915// reservation into two reservations. 2916void os::split_reserved_memory(char *base, size_t size, size_t split, 2917 bool realloc) { 2918 if (size > 0) { 2919 release_memory(base, size); 2920 if (realloc) { 2921 reserve_memory(split, base); 2922 } 2923 if (size != split) { 2924 reserve_memory(size - split, base + split); 2925 } 2926 } 2927} 2928 2929char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { 2930 assert((size_t)addr % os::vm_allocation_granularity() == 0, 2931 "reserve alignment"); 2932 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); 2933 char* res; 2934 // note that if UseLargePages is on, all the areas that require interleaving 2935 // will go thru reserve_memory_special rather than thru here. 2936 bool use_individual = (UseNUMAInterleaving && !UseLargePages); 2937 if (!use_individual) { 2938 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); 2939 } else { 2940 elapsedTimer reserveTimer; 2941 if( Verbose && PrintMiscellaneous ) reserveTimer.start(); 2942 // in numa interleaving, we have to allocate pages individually 2943 // (well really chunks of NUMAInterleaveGranularity size) 2944 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE); 2945 if (res == NULL) { 2946 warning("NUMA page allocation failed"); 2947 } 2948 if( Verbose && PrintMiscellaneous ) { 2949 reserveTimer.stop(); 2950 tty->print_cr("reserve_memory of %Ix bytes took %ld ms (%ld ticks)", bytes, 2951 reserveTimer.milliseconds(), reserveTimer.ticks()); 2952 } 2953 } 2954 assert(res == NULL || addr == NULL || addr == res, 2955 "Unexpected address from reserve."); 2956 2957 return res; 2958} 2959 2960// Reserve memory at an arbitrary address, only if that area is 2961// available (and not reserved for something else). 2962char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2963 // Windows os::reserve_memory() fails of the requested address range is 2964 // not avilable. 2965 return reserve_memory(bytes, requested_addr); 2966} 2967 2968size_t os::large_page_size() { 2969 return _large_page_size; 2970} 2971 2972bool os::can_commit_large_page_memory() { 2973 // Windows only uses large page memory when the entire region is reserved 2974 // and committed in a single VirtualAlloc() call. This may change in the 2975 // future, but with Windows 2003 it's not possible to commit on demand. 2976 return false; 2977} 2978 2979bool os::can_execute_large_page_memory() { 2980 return true; 2981} 2982 2983char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { 2984 2985 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; 2986 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 2987 2988 // with large pages, there are two cases where we need to use Individual Allocation 2989 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003) 2990 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page 2991 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) { 2992 if (TracePageSizes && Verbose) { 2993 tty->print_cr("Reserving large pages individually."); 2994 } 2995 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError); 2996 if (p_buf == NULL) { 2997 // give an appropriate warning message 2998 if (UseNUMAInterleaving) { 2999 warning("NUMA large page allocation failed, UseLargePages flag ignored"); 3000 } 3001 if (UseLargePagesIndividualAllocation) { 3002 warning("Individually allocated large pages failed, " 3003 "use -XX:-UseLargePagesIndividualAllocation to turn off"); 3004 } 3005 return NULL; 3006 } 3007 3008 return p_buf; 3009 3010 } else { 3011 // normal policy just allocate it all at once 3012 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 3013 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); 3014 return res; 3015 } 3016} 3017 3018bool os::release_memory_special(char* base, size_t bytes) { 3019 return release_memory(base, bytes); 3020} 3021 3022void os::print_statistics() { 3023} 3024 3025bool os::commit_memory(char* addr, size_t bytes, bool exec) { 3026 if (bytes == 0) { 3027 // Don't bother the OS with noops. 3028 return true; 3029 } 3030 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); 3031 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); 3032 // Don't attempt to print anything if the OS call fails. We're 3033 // probably low on resources, so the print itself may cause crashes. 3034 3035 // unless we have NUMAInterleaving enabled, the range of a commit 3036 // is always within a reserve covered by a single VirtualAlloc 3037 // in that case we can just do a single commit for the requested size 3038 if (!UseNUMAInterleaving) { 3039 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false; 3040 if (exec) { 3041 DWORD oldprot; 3042 // Windows doc says to use VirtualProtect to get execute permissions 3043 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false; 3044 } 3045 return true; 3046 } else { 3047 3048 // when NUMAInterleaving is enabled, the commit might cover a range that 3049 // came from multiple VirtualAlloc reserves (using allocate_pages_individually). 3050 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery 3051 // returns represents the number of bytes that can be committed in one step. 3052 size_t bytes_remaining = bytes; 3053 char * next_alloc_addr = addr; 3054 while (bytes_remaining > 0) { 3055 MEMORY_BASIC_INFORMATION alloc_info; 3056 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info)); 3057 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize); 3058 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL) 3059 return false; 3060 if (exec) { 3061 DWORD oldprot; 3062 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot)) 3063 return false; 3064 } 3065 bytes_remaining -= bytes_to_rq; 3066 next_alloc_addr += bytes_to_rq; 3067 } 3068 } 3069 // if we made it this far, return true 3070 return true; 3071} 3072 3073bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, 3074 bool exec) { 3075 return commit_memory(addr, size, exec); 3076} 3077 3078bool os::uncommit_memory(char* addr, size_t bytes) { 3079 if (bytes == 0) { 3080 // Don't bother the OS with noops. 3081 return true; 3082 } 3083 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); 3084 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); 3085 return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0; 3086} 3087 3088bool os::release_memory(char* addr, size_t bytes) { 3089 return VirtualFree(addr, 0, MEM_RELEASE) != 0; 3090} 3091 3092bool os::create_stack_guard_pages(char* addr, size_t size) { 3093 return os::commit_memory(addr, size); 3094} 3095 3096bool os::remove_stack_guard_pages(char* addr, size_t size) { 3097 return os::uncommit_memory(addr, size); 3098} 3099 3100// Set protections specified 3101bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3102 bool is_committed) { 3103 unsigned int p = 0; 3104 switch (prot) { 3105 case MEM_PROT_NONE: p = PAGE_NOACCESS; break; 3106 case MEM_PROT_READ: p = PAGE_READONLY; break; 3107 case MEM_PROT_RW: p = PAGE_READWRITE; break; 3108 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; 3109 default: 3110 ShouldNotReachHere(); 3111 } 3112 3113 DWORD old_status; 3114 3115 // Strange enough, but on Win32 one can change protection only for committed 3116 // memory, not a big deal anyway, as bytes less or equal than 64K 3117 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { 3118 fatal("cannot commit protection page"); 3119 } 3120 // One cannot use os::guard_memory() here, as on Win32 guard page 3121 // have different (one-shot) semantics, from MSDN on PAGE_GUARD: 3122 // 3123 // Pages in the region become guard pages. Any attempt to access a guard page 3124 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off 3125 // the guard page status. Guard pages thus act as a one-time access alarm. 3126 return VirtualProtect(addr, bytes, p, &old_status) != 0; 3127} 3128 3129bool os::guard_memory(char* addr, size_t bytes) { 3130 DWORD old_status; 3131 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; 3132} 3133 3134bool os::unguard_memory(char* addr, size_t bytes) { 3135 DWORD old_status; 3136 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; 3137} 3138 3139void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3140void os::free_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3141void os::numa_make_global(char *addr, size_t bytes) { } 3142void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } 3143bool os::numa_topology_changed() { return false; } 3144size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); } 3145int os::numa_get_group_id() { return 0; } 3146size_t os::numa_get_leaf_groups(int *ids, size_t size) { 3147 if (numa_node_list_holder.get_count() == 0 && size > 0) { 3148 // Provide an answer for UMA systems 3149 ids[0] = 0; 3150 return 1; 3151 } else { 3152 // check for size bigger than actual groups_num 3153 size = MIN2(size, numa_get_groups_num()); 3154 for (int i = 0; i < (int)size; i++) { 3155 ids[i] = numa_node_list_holder.get_node_list_entry(i); 3156 } 3157 return size; 3158 } 3159} 3160 3161bool os::get_page_info(char *start, page_info* info) { 3162 return false; 3163} 3164 3165char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 3166 return end; 3167} 3168 3169char* os::non_memory_address_word() { 3170 // Must never look like an address returned by reserve_memory, 3171 // even in its subfields (as defined by the CPU immediate fields, 3172 // if the CPU splits constants across multiple instructions). 3173 return (char*)-1; 3174} 3175 3176#define MAX_ERROR_COUNT 100 3177#define SYS_THREAD_ERROR 0xffffffffUL 3178 3179void os::pd_start_thread(Thread* thread) { 3180 DWORD ret = ResumeThread(thread->osthread()->thread_handle()); 3181 // Returns previous suspend state: 3182 // 0: Thread was not suspended 3183 // 1: Thread is running now 3184 // >1: Thread is still suspended. 3185 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back 3186} 3187 3188class HighResolutionInterval { 3189 // The default timer resolution seems to be 10 milliseconds. 3190 // (Where is this written down?) 3191 // If someone wants to sleep for only a fraction of the default, 3192 // then we set the timer resolution down to 1 millisecond for 3193 // the duration of their interval. 3194 // We carefully set the resolution back, since otherwise we 3195 // seem to incur an overhead (3%?) that we don't need. 3196 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. 3197 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). 3198 // Alternatively, we could compute the relative error (503/500 = .6%) and only use 3199 // timeBeginPeriod() if the relative error exceeded some threshold. 3200 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and 3201 // to decreased efficiency related to increased timer "tick" rates. We want to minimize 3202 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high 3203 // resolution timers running. 3204private: 3205 jlong resolution; 3206public: 3207 HighResolutionInterval(jlong ms) { 3208 resolution = ms % 10L; 3209 if (resolution != 0) { 3210 MMRESULT result = timeBeginPeriod(1L); 3211 } 3212 } 3213 ~HighResolutionInterval() { 3214 if (resolution != 0) { 3215 MMRESULT result = timeEndPeriod(1L); 3216 } 3217 resolution = 0L; 3218 } 3219}; 3220 3221int os::sleep(Thread* thread, jlong ms, bool interruptable) { 3222 jlong limit = (jlong) MAXDWORD; 3223 3224 while(ms > limit) { 3225 int res; 3226 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) 3227 return res; 3228 ms -= limit; 3229 } 3230 3231 assert(thread == Thread::current(), "thread consistency check"); 3232 OSThread* osthread = thread->osthread(); 3233 OSThreadWaitState osts(osthread, false /* not Object.wait() */); 3234 int result; 3235 if (interruptable) { 3236 assert(thread->is_Java_thread(), "must be java thread"); 3237 JavaThread *jt = (JavaThread *) thread; 3238 ThreadBlockInVM tbivm(jt); 3239 3240 jt->set_suspend_equivalent(); 3241 // cleared by handle_special_suspend_equivalent_condition() or 3242 // java_suspend_self() via check_and_wait_while_suspended() 3243 3244 HANDLE events[1]; 3245 events[0] = osthread->interrupt_event(); 3246 HighResolutionInterval *phri=NULL; 3247 if(!ForceTimeHighResolution) 3248 phri = new HighResolutionInterval( ms ); 3249 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { 3250 result = OS_TIMEOUT; 3251 } else { 3252 ResetEvent(osthread->interrupt_event()); 3253 osthread->set_interrupted(false); 3254 result = OS_INTRPT; 3255 } 3256 delete phri; //if it is NULL, harmless 3257 3258 // were we externally suspended while we were waiting? 3259 jt->check_and_wait_while_suspended(); 3260 } else { 3261 assert(!thread->is_Java_thread(), "must not be java thread"); 3262 Sleep((long) ms); 3263 result = OS_TIMEOUT; 3264 } 3265 return result; 3266} 3267 3268// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3269void os::infinite_sleep() { 3270 while (true) { // sleep forever ... 3271 Sleep(100000); // ... 100 seconds at a time 3272 } 3273} 3274 3275typedef BOOL (WINAPI * STTSignature)(void) ; 3276 3277os::YieldResult os::NakedYield() { 3278 // Use either SwitchToThread() or Sleep(0) 3279 // Consider passing back the return value from SwitchToThread(). 3280 if (os::Kernel32Dll::SwitchToThreadAvailable()) { 3281 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; 3282 } else { 3283 Sleep(0); 3284 } 3285 return os::YIELD_UNKNOWN ; 3286} 3287 3288void os::yield() { os::NakedYield(); } 3289 3290void os::yield_all(int attempts) { 3291 // Yields to all threads, including threads with lower priorities 3292 Sleep(1); 3293} 3294 3295// Win32 only gives you access to seven real priorities at a time, 3296// so we compress Java's ten down to seven. It would be better 3297// if we dynamically adjusted relative priorities. 3298 3299int os::java_to_os_priority[MaxPriority + 1] = { 3300 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3301 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3302 THREAD_PRIORITY_LOWEST, // 2 3303 THREAD_PRIORITY_BELOW_NORMAL, // 3 3304 THREAD_PRIORITY_BELOW_NORMAL, // 4 3305 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3306 THREAD_PRIORITY_NORMAL, // 6 3307 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3308 THREAD_PRIORITY_ABOVE_NORMAL, // 8 3309 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3310 THREAD_PRIORITY_HIGHEST // 10 MaxPriority 3311}; 3312 3313int prio_policy1[MaxPriority + 1] = { 3314 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3315 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3316 THREAD_PRIORITY_LOWEST, // 2 3317 THREAD_PRIORITY_BELOW_NORMAL, // 3 3318 THREAD_PRIORITY_BELOW_NORMAL, // 4 3319 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3320 THREAD_PRIORITY_ABOVE_NORMAL, // 6 3321 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3322 THREAD_PRIORITY_HIGHEST, // 8 3323 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3324 THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority 3325}; 3326 3327static int prio_init() { 3328 // If ThreadPriorityPolicy is 1, switch tables 3329 if (ThreadPriorityPolicy == 1) { 3330 int i; 3331 for (i = 0; i < MaxPriority + 1; i++) { 3332 os::java_to_os_priority[i] = prio_policy1[i]; 3333 } 3334 } 3335 return 0; 3336} 3337 3338OSReturn os::set_native_priority(Thread* thread, int priority) { 3339 if (!UseThreadPriorities) return OS_OK; 3340 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; 3341 return ret ? OS_OK : OS_ERR; 3342} 3343 3344OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { 3345 if ( !UseThreadPriorities ) { 3346 *priority_ptr = java_to_os_priority[NormPriority]; 3347 return OS_OK; 3348 } 3349 int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); 3350 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { 3351 assert(false, "GetThreadPriority failed"); 3352 return OS_ERR; 3353 } 3354 *priority_ptr = os_prio; 3355 return OS_OK; 3356} 3357 3358 3359// Hint to the underlying OS that a task switch would not be good. 3360// Void return because it's a hint and can fail. 3361void os::hint_no_preempt() {} 3362 3363void os::interrupt(Thread* thread) { 3364 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3365 "possibility of dangling Thread pointer"); 3366 3367 OSThread* osthread = thread->osthread(); 3368 osthread->set_interrupted(true); 3369 // More than one thread can get here with the same value of osthread, 3370 // resulting in multiple notifications. We do, however, want the store 3371 // to interrupted() to be visible to other threads before we post 3372 // the interrupt event. 3373 OrderAccess::release(); 3374 SetEvent(osthread->interrupt_event()); 3375 // For JSR166: unpark after setting status 3376 if (thread->is_Java_thread()) 3377 ((JavaThread*)thread)->parker()->unpark(); 3378 3379 ParkEvent * ev = thread->_ParkEvent ; 3380 if (ev != NULL) ev->unpark() ; 3381 3382} 3383 3384 3385bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3386 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3387 "possibility of dangling Thread pointer"); 3388 3389 OSThread* osthread = thread->osthread(); 3390 bool interrupted = osthread->interrupted(); 3391 // There is no synchronization between the setting of the interrupt 3392 // and it being cleared here. It is critical - see 6535709 - that 3393 // we only clear the interrupt state, and reset the interrupt event, 3394 // if we are going to report that we were indeed interrupted - else 3395 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups 3396 // depending on the timing 3397 if (interrupted && clear_interrupted) { 3398 osthread->set_interrupted(false); 3399 ResetEvent(osthread->interrupt_event()); 3400 } // Otherwise leave the interrupted state alone 3401 3402 return interrupted; 3403} 3404 3405// Get's a pc (hint) for a running thread. Currently used only for profiling. 3406ExtendedPC os::get_thread_pc(Thread* thread) { 3407 CONTEXT context; 3408 context.ContextFlags = CONTEXT_CONTROL; 3409 HANDLE handle = thread->osthread()->thread_handle(); 3410#ifdef _M_IA64 3411 assert(0, "Fix get_thread_pc"); 3412 return ExtendedPC(NULL); 3413#else 3414 if (GetThreadContext(handle, &context)) { 3415#ifdef _M_AMD64 3416 return ExtendedPC((address) context.Rip); 3417#else 3418 return ExtendedPC((address) context.Eip); 3419#endif 3420 } else { 3421 return ExtendedPC(NULL); 3422 } 3423#endif 3424} 3425 3426// GetCurrentThreadId() returns DWORD 3427intx os::current_thread_id() { return GetCurrentThreadId(); } 3428 3429static int _initial_pid = 0; 3430 3431int os::current_process_id() 3432{ 3433 return (_initial_pid ? _initial_pid : _getpid()); 3434} 3435 3436int os::win32::_vm_page_size = 0; 3437int os::win32::_vm_allocation_granularity = 0; 3438int os::win32::_processor_type = 0; 3439// Processor level is not available on non-NT systems, use vm_version instead 3440int os::win32::_processor_level = 0; 3441julong os::win32::_physical_memory = 0; 3442size_t os::win32::_default_stack_size = 0; 3443 3444 intx os::win32::_os_thread_limit = 0; 3445volatile intx os::win32::_os_thread_count = 0; 3446 3447bool os::win32::_is_nt = false; 3448bool os::win32::_is_windows_2003 = false; 3449bool os::win32::_is_windows_server = false; 3450 3451void os::win32::initialize_system_info() { 3452 SYSTEM_INFO si; 3453 GetSystemInfo(&si); 3454 _vm_page_size = si.dwPageSize; 3455 _vm_allocation_granularity = si.dwAllocationGranularity; 3456 _processor_type = si.dwProcessorType; 3457 _processor_level = si.wProcessorLevel; 3458 set_processor_count(si.dwNumberOfProcessors); 3459 3460 MEMORYSTATUSEX ms; 3461 ms.dwLength = sizeof(ms); 3462 3463 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, 3464 // dwMemoryLoad (% of memory in use) 3465 GlobalMemoryStatusEx(&ms); 3466 _physical_memory = ms.ullTotalPhys; 3467 3468 OSVERSIONINFOEX oi; 3469 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 3470 GetVersionEx((OSVERSIONINFO*)&oi); 3471 switch(oi.dwPlatformId) { 3472 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; 3473 case VER_PLATFORM_WIN32_NT: 3474 _is_nt = true; 3475 { 3476 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; 3477 if (os_vers == 5002) { 3478 _is_windows_2003 = true; 3479 } 3480 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER || 3481 oi.wProductType == VER_NT_SERVER) { 3482 _is_windows_server = true; 3483 } 3484 } 3485 break; 3486 default: fatal("Unknown platform"); 3487 } 3488 3489 _default_stack_size = os::current_stack_size(); 3490 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); 3491 assert((_default_stack_size & (_vm_page_size - 1)) == 0, 3492 "stack size not a multiple of page size"); 3493 3494 initialize_performance_counter(); 3495 3496 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is 3497 // known to deadlock the system, if the VM issues to thread operations with 3498 // a too high frequency, e.g., such as changing the priorities. 3499 // The 6000 seems to work well - no deadlocks has been notices on the test 3500 // programs that we have seen experience this problem. 3501 if (!os::win32::is_nt()) { 3502 StarvationMonitorInterval = 6000; 3503 } 3504} 3505 3506 3507HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) { 3508 char path[MAX_PATH]; 3509 DWORD size; 3510 DWORD pathLen = (DWORD)sizeof(path); 3511 HINSTANCE result = NULL; 3512 3513 // only allow library name without path component 3514 assert(strchr(name, '\\') == NULL, "path not allowed"); 3515 assert(strchr(name, ':') == NULL, "path not allowed"); 3516 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) { 3517 jio_snprintf(ebuf, ebuflen, 3518 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name); 3519 return NULL; 3520 } 3521 3522 // search system directory 3523 if ((size = GetSystemDirectory(path, pathLen)) > 0) { 3524 strcat(path, "\\"); 3525 strcat(path, name); 3526 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3527 return result; 3528 } 3529 } 3530 3531 // try Windows directory 3532 if ((size = GetWindowsDirectory(path, pathLen)) > 0) { 3533 strcat(path, "\\"); 3534 strcat(path, name); 3535 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3536 return result; 3537 } 3538 } 3539 3540 jio_snprintf(ebuf, ebuflen, 3541 "os::win32::load_windows_dll() cannot load %s from system directories.", name); 3542 return NULL; 3543} 3544 3545void os::win32::setmode_streams() { 3546 _setmode(_fileno(stdin), _O_BINARY); 3547 _setmode(_fileno(stdout), _O_BINARY); 3548 _setmode(_fileno(stderr), _O_BINARY); 3549} 3550 3551 3552bool os::is_debugger_attached() { 3553 return IsDebuggerPresent() ? true : false; 3554} 3555 3556 3557void os::wait_for_keypress_at_exit(void) { 3558 if (PauseAtExit) { 3559 fprintf(stderr, "Press any key to continue...\n"); 3560 fgetc(stdin); 3561 } 3562} 3563 3564 3565int os::message_box(const char* title, const char* message) { 3566 int result = MessageBox(NULL, message, title, 3567 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); 3568 return result == IDYES; 3569} 3570 3571int os::allocate_thread_local_storage() { 3572 return TlsAlloc(); 3573} 3574 3575 3576void os::free_thread_local_storage(int index) { 3577 TlsFree(index); 3578} 3579 3580 3581void os::thread_local_storage_at_put(int index, void* value) { 3582 TlsSetValue(index, value); 3583 assert(thread_local_storage_at(index) == value, "Just checking"); 3584} 3585 3586 3587void* os::thread_local_storage_at(int index) { 3588 return TlsGetValue(index); 3589} 3590 3591 3592#ifndef PRODUCT 3593#ifndef _WIN64 3594// Helpers to check whether NX protection is enabled 3595int nx_exception_filter(_EXCEPTION_POINTERS *pex) { 3596 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 3597 pex->ExceptionRecord->NumberParameters > 0 && 3598 pex->ExceptionRecord->ExceptionInformation[0] == 3599 EXCEPTION_INFO_EXEC_VIOLATION) { 3600 return EXCEPTION_EXECUTE_HANDLER; 3601 } 3602 return EXCEPTION_CONTINUE_SEARCH; 3603} 3604 3605void nx_check_protection() { 3606 // If NX is enabled we'll get an exception calling into code on the stack 3607 char code[] = { (char)0xC3 }; // ret 3608 void *code_ptr = (void *)code; 3609 __try { 3610 __asm call code_ptr 3611 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { 3612 tty->print_raw_cr("NX protection detected."); 3613 } 3614} 3615#endif // _WIN64 3616#endif // PRODUCT 3617 3618// this is called _before_ the global arguments have been parsed 3619void os::init(void) { 3620 _initial_pid = _getpid(); 3621 3622 init_random(1234567); 3623 3624 win32::initialize_system_info(); 3625 win32::setmode_streams(); 3626 init_page_sizes((size_t) win32::vm_page_size()); 3627 3628 // For better scalability on MP systems (must be called after initialize_system_info) 3629#ifndef PRODUCT 3630 if (is_MP()) { 3631 NoYieldsInMicrolock = true; 3632 } 3633#endif 3634 // This may be overridden later when argument processing is done. 3635 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, 3636 os::win32::is_windows_2003()); 3637 3638 // Initialize main_process and main_thread 3639 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle 3640 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, 3641 &main_thread, THREAD_ALL_ACCESS, false, 0)) { 3642 fatal("DuplicateHandle failed\n"); 3643 } 3644 main_thread_id = (int) GetCurrentThreadId(); 3645} 3646 3647// To install functions for atexit processing 3648extern "C" { 3649 static void perfMemory_exit_helper() { 3650 perfMemory_exit(); 3651 } 3652} 3653 3654// this is called _after_ the global arguments have been parsed 3655jint os::init_2(void) { 3656 // Allocate a single page and mark it as readable for safepoint polling 3657 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); 3658 guarantee( polling_page != NULL, "Reserve Failed for polling page"); 3659 3660 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); 3661 guarantee( return_page != NULL, "Commit Failed for polling page"); 3662 3663 os::set_polling_page( polling_page ); 3664 3665#ifndef PRODUCT 3666 if( Verbose && PrintMiscellaneous ) 3667 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 3668#endif 3669 3670 if (!UseMembar) { 3671 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); 3672 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); 3673 3674 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); 3675 guarantee( return_page != NULL, "Commit Failed for memory serialize page"); 3676 3677 os::set_memory_serialize_page( mem_serialize_page ); 3678 3679#ifndef PRODUCT 3680 if(Verbose && PrintMiscellaneous) 3681 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 3682#endif 3683 } 3684 3685 os::large_page_init(); 3686 3687 // Setup Windows Exceptions 3688 3689 // On Itanium systems, Structured Exception Handling does not 3690 // work since stack frames must be walkable by the OS. Since 3691 // much of our code is dynamically generated, and we do not have 3692 // proper unwind .xdata sections, the system simply exits 3693 // rather than delivering the exception. To work around 3694 // this we use VectorExceptions instead. 3695#ifdef _WIN64 3696 if (UseVectoredExceptions) { 3697 topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter); 3698 } 3699#endif 3700 3701 // for debugging float code generation bugs 3702 if (ForceFloatExceptions) { 3703#ifndef _WIN64 3704 static long fp_control_word = 0; 3705 __asm { fstcw fp_control_word } 3706 // see Intel PPro Manual, Vol. 2, p 7-16 3707 const long precision = 0x20; 3708 const long underflow = 0x10; 3709 const long overflow = 0x08; 3710 const long zero_div = 0x04; 3711 const long denorm = 0x02; 3712 const long invalid = 0x01; 3713 fp_control_word |= invalid; 3714 __asm { fldcw fp_control_word } 3715#endif 3716 } 3717 3718 // If stack_commit_size is 0, windows will reserve the default size, 3719 // but only commit a small portion of it. 3720 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); 3721 size_t default_reserve_size = os::win32::default_stack_size(); 3722 size_t actual_reserve_size = stack_commit_size; 3723 if (stack_commit_size < default_reserve_size) { 3724 // If stack_commit_size == 0, we want this too 3725 actual_reserve_size = default_reserve_size; 3726 } 3727 3728 // Check minimum allowable stack size for thread creation and to initialize 3729 // the java system classes, including StackOverflowError - depends on page 3730 // size. Add a page for compiler2 recursion in main thread. 3731 // Add in 2*BytesPerWord times page size to account for VM stack during 3732 // class initialization depending on 32 or 64 bit VM. 3733 size_t min_stack_allowed = 3734 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 3735 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size(); 3736 if (actual_reserve_size < min_stack_allowed) { 3737 tty->print_cr("\nThe stack size specified is too small, " 3738 "Specify at least %dk", 3739 min_stack_allowed / K); 3740 return JNI_ERR; 3741 } 3742 3743 JavaThread::set_stack_size_at_create(stack_commit_size); 3744 3745 // Calculate theoretical max. size of Threads to guard gainst artifical 3746 // out-of-memory situations, where all available address-space has been 3747 // reserved by thread stacks. 3748 assert(actual_reserve_size != 0, "Must have a stack"); 3749 3750 // Calculate the thread limit when we should start doing Virtual Memory 3751 // banging. Currently when the threads will have used all but 200Mb of space. 3752 // 3753 // TODO: consider performing a similar calculation for commit size instead 3754 // as reserve size, since on a 64-bit platform we'll run into that more 3755 // often than running out of virtual memory space. We can use the 3756 // lower value of the two calculations as the os_thread_limit. 3757 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); 3758 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); 3759 3760 // at exit methods are called in the reverse order of their registration. 3761 // there is no limit to the number of functions registered. atexit does 3762 // not set errno. 3763 3764 if (PerfAllowAtExitRegistration) { 3765 // only register atexit functions if PerfAllowAtExitRegistration is set. 3766 // atexit functions can be delayed until process exit time, which 3767 // can be problematic for embedded VM situations. Embedded VMs should 3768 // call DestroyJavaVM() to assure that VM resources are released. 3769 3770 // note: perfMemory_exit_helper atexit function may be removed in 3771 // the future if the appropriate cleanup code can be added to the 3772 // VM_Exit VMOperation's doit method. 3773 if (atexit(perfMemory_exit_helper) != 0) { 3774 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); 3775 } 3776 } 3777 3778#ifndef _WIN64 3779 // Print something if NX is enabled (win32 on AMD64) 3780 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); 3781#endif 3782 3783 // initialize thread priority policy 3784 prio_init(); 3785 3786 if (UseNUMA && !ForceNUMA) { 3787 UseNUMA = false; // We don't fully support this yet 3788 } 3789 3790 if (UseNUMAInterleaving) { 3791 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag 3792 bool success = numa_interleaving_init(); 3793 if (!success) UseNUMAInterleaving = false; 3794 } 3795 3796 return JNI_OK; 3797} 3798 3799void os::init_3(void) { 3800 return; 3801} 3802 3803// Mark the polling page as unreadable 3804void os::make_polling_page_unreadable(void) { 3805 DWORD old_status; 3806 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) 3807 fatal("Could not disable polling page"); 3808}; 3809 3810// Mark the polling page as readable 3811void os::make_polling_page_readable(void) { 3812 DWORD old_status; 3813 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) 3814 fatal("Could not enable polling page"); 3815}; 3816 3817 3818int os::stat(const char *path, struct stat *sbuf) { 3819 char pathbuf[MAX_PATH]; 3820 if (strlen(path) > MAX_PATH - 1) { 3821 errno = ENAMETOOLONG; 3822 return -1; 3823 } 3824 os::native_path(strcpy(pathbuf, path)); 3825 int ret = ::stat(pathbuf, sbuf); 3826 if (sbuf != NULL && UseUTCFileTimestamp) { 3827 // Fix for 6539723. st_mtime returned from stat() is dependent on 3828 // the system timezone and so can return different values for the 3829 // same file if/when daylight savings time changes. This adjustment 3830 // makes sure the same timestamp is returned regardless of the TZ. 3831 // 3832 // See: 3833 // http://msdn.microsoft.com/library/ 3834 // default.asp?url=/library/en-us/sysinfo/base/ 3835 // time_zone_information_str.asp 3836 // and 3837 // http://msdn.microsoft.com/library/default.asp?url= 3838 // /library/en-us/sysinfo/base/settimezoneinformation.asp 3839 // 3840 // NOTE: there is a insidious bug here: If the timezone is changed 3841 // after the call to stat() but before 'GetTimeZoneInformation()', then 3842 // the adjustment we do here will be wrong and we'll return the wrong 3843 // value (which will likely end up creating an invalid class data 3844 // archive). Absent a better API for this, or some time zone locking 3845 // mechanism, we'll have to live with this risk. 3846 TIME_ZONE_INFORMATION tz; 3847 DWORD tzid = GetTimeZoneInformation(&tz); 3848 int daylightBias = 3849 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; 3850 sbuf->st_mtime += (tz.Bias + daylightBias) * 60; 3851 } 3852 return ret; 3853} 3854 3855 3856#define FT2INT64(ft) \ 3857 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) 3858 3859 3860// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 3861// are used by JVM M&M and JVMTI to get user+sys or user CPU time 3862// of a thread. 3863// 3864// current_thread_cpu_time() and thread_cpu_time(Thread*) returns 3865// the fast estimate available on the platform. 3866 3867// current_thread_cpu_time() is not optimized for Windows yet 3868jlong os::current_thread_cpu_time() { 3869 // return user + sys since the cost is the same 3870 return os::thread_cpu_time(Thread::current(), true /* user+sys */); 3871} 3872 3873jlong os::thread_cpu_time(Thread* thread) { 3874 // consistent with what current_thread_cpu_time() returns. 3875 return os::thread_cpu_time(thread, true /* user+sys */); 3876} 3877 3878jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 3879 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 3880} 3881 3882jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { 3883 // This code is copy from clasic VM -> hpi::sysThreadCPUTime 3884 // If this function changes, os::is_thread_cpu_time_supported() should too 3885 if (os::win32::is_nt()) { 3886 FILETIME CreationTime; 3887 FILETIME ExitTime; 3888 FILETIME KernelTime; 3889 FILETIME UserTime; 3890 3891 if ( GetThreadTimes(thread->osthread()->thread_handle(), 3892 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3893 return -1; 3894 else 3895 if (user_sys_cpu_time) { 3896 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; 3897 } else { 3898 return FT2INT64(UserTime) * 100; 3899 } 3900 } else { 3901 return (jlong) timeGetTime() * 1000000; 3902 } 3903} 3904 3905void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3906 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3907 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3908 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3909 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3910} 3911 3912void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3913 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3914 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3915 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3916 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3917} 3918 3919bool os::is_thread_cpu_time_supported() { 3920 // see os::thread_cpu_time 3921 if (os::win32::is_nt()) { 3922 FILETIME CreationTime; 3923 FILETIME ExitTime; 3924 FILETIME KernelTime; 3925 FILETIME UserTime; 3926 3927 if ( GetThreadTimes(GetCurrentThread(), 3928 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3929 return false; 3930 else 3931 return true; 3932 } else { 3933 return false; 3934 } 3935} 3936 3937// Windows does't provide a loadavg primitive so this is stubbed out for now. 3938// It does have primitives (PDH API) to get CPU usage and run queue length. 3939// "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" 3940// If we wanted to implement loadavg on Windows, we have a few options: 3941// 3942// a) Query CPU usage and run queue length and "fake" an answer by 3943// returning the CPU usage if it's under 100%, and the run queue 3944// length otherwise. It turns out that querying is pretty slow 3945// on Windows, on the order of 200 microseconds on a fast machine. 3946// Note that on the Windows the CPU usage value is the % usage 3947// since the last time the API was called (and the first call 3948// returns 100%), so we'd have to deal with that as well. 3949// 3950// b) Sample the "fake" answer using a sampling thread and store 3951// the answer in a global variable. The call to loadavg would 3952// just return the value of the global, avoiding the slow query. 3953// 3954// c) Sample a better answer using exponential decay to smooth the 3955// value. This is basically the algorithm used by UNIX kernels. 3956// 3957// Note that sampling thread starvation could affect both (b) and (c). 3958int os::loadavg(double loadavg[], int nelem) { 3959 return -1; 3960} 3961 3962 3963// DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() 3964bool os::dont_yield() { 3965 return DontYieldALot; 3966} 3967 3968// This method is a slightly reworked copy of JDK's sysOpen 3969// from src/windows/hpi/src/sys_api_md.c 3970 3971int os::open(const char *path, int oflag, int mode) { 3972 char pathbuf[MAX_PATH]; 3973 3974 if (strlen(path) > MAX_PATH - 1) { 3975 errno = ENAMETOOLONG; 3976 return -1; 3977 } 3978 os::native_path(strcpy(pathbuf, path)); 3979 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode); 3980} 3981 3982// Is a (classpath) directory empty? 3983bool os::dir_is_empty(const char* path) { 3984 WIN32_FIND_DATA fd; 3985 HANDLE f = FindFirstFile(path, &fd); 3986 if (f == INVALID_HANDLE_VALUE) { 3987 return true; 3988 } 3989 FindClose(f); 3990 return false; 3991} 3992 3993// create binary file, rewriting existing file if required 3994int os::create_binary_file(const char* path, bool rewrite_existing) { 3995 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; 3996 if (!rewrite_existing) { 3997 oflags |= _O_EXCL; 3998 } 3999 return ::open(path, oflags, _S_IREAD | _S_IWRITE); 4000} 4001 4002// return current position of file pointer 4003jlong os::current_file_offset(int fd) { 4004 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); 4005} 4006 4007// move file pointer to the specified offset 4008jlong os::seek_to_file_offset(int fd, jlong offset) { 4009 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); 4010} 4011 4012 4013jlong os::lseek(int fd, jlong offset, int whence) { 4014 return (jlong) ::_lseeki64(fd, offset, whence); 4015} 4016 4017// This method is a slightly reworked copy of JDK's sysNativePath 4018// from src/windows/hpi/src/path_md.c 4019 4020/* Convert a pathname to native format. On win32, this involves forcing all 4021 separators to be '\\' rather than '/' (both are legal inputs, but Win95 4022 sometimes rejects '/') and removing redundant separators. The input path is 4023 assumed to have been converted into the character encoding used by the local 4024 system. Because this might be a double-byte encoding, care is taken to 4025 treat double-byte lead characters correctly. 4026 4027 This procedure modifies the given path in place, as the result is never 4028 longer than the original. There is no error return; this operation always 4029 succeeds. */ 4030char * os::native_path(char *path) { 4031 char *src = path, *dst = path, *end = path; 4032 char *colon = NULL; /* If a drive specifier is found, this will 4033 point to the colon following the drive 4034 letter */ 4035 4036 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */ 4037 assert(((!::IsDBCSLeadByte('/')) 4038 && (!::IsDBCSLeadByte('\\')) 4039 && (!::IsDBCSLeadByte(':'))), 4040 "Illegal lead byte"); 4041 4042 /* Check for leading separators */ 4043#define isfilesep(c) ((c) == '/' || (c) == '\\') 4044 while (isfilesep(*src)) { 4045 src++; 4046 } 4047 4048 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') { 4049 /* Remove leading separators if followed by drive specifier. This 4050 hack is necessary to support file URLs containing drive 4051 specifiers (e.g., "file://c:/path"). As a side effect, 4052 "/c:/path" can be used as an alternative to "c:/path". */ 4053 *dst++ = *src++; 4054 colon = dst; 4055 *dst++ = ':'; 4056 src++; 4057 } else { 4058 src = path; 4059 if (isfilesep(src[0]) && isfilesep(src[1])) { 4060 /* UNC pathname: Retain first separator; leave src pointed at 4061 second separator so that further separators will be collapsed 4062 into the second separator. The result will be a pathname 4063 beginning with "\\\\" followed (most likely) by a host name. */ 4064 src = dst = path + 1; 4065 path[0] = '\\'; /* Force first separator to '\\' */ 4066 } 4067 } 4068 4069 end = dst; 4070 4071 /* Remove redundant separators from remainder of path, forcing all 4072 separators to be '\\' rather than '/'. Also, single byte space 4073 characters are removed from the end of the path because those 4074 are not legal ending characters on this operating system. 4075 */ 4076 while (*src != '\0') { 4077 if (isfilesep(*src)) { 4078 *dst++ = '\\'; src++; 4079 while (isfilesep(*src)) src++; 4080 if (*src == '\0') { 4081 /* Check for trailing separator */ 4082 end = dst; 4083 if (colon == dst - 2) break; /* "z:\\" */ 4084 if (dst == path + 1) break; /* "\\" */ 4085 if (dst == path + 2 && isfilesep(path[0])) { 4086 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the 4087 beginning of a UNC pathname. Even though it is not, by 4088 itself, a valid UNC pathname, we leave it as is in order 4089 to be consistent with the path canonicalizer as well 4090 as the win32 APIs, which treat this case as an invalid 4091 UNC pathname rather than as an alias for the root 4092 directory of the current drive. */ 4093 break; 4094 } 4095 end = --dst; /* Path does not denote a root directory, so 4096 remove trailing separator */ 4097 break; 4098 } 4099 end = dst; 4100 } else { 4101 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */ 4102 *dst++ = *src++; 4103 if (*src) *dst++ = *src++; 4104 end = dst; 4105 } else { /* Copy a single-byte character */ 4106 char c = *src++; 4107 *dst++ = c; 4108 /* Space is not a legal ending character */ 4109 if (c != ' ') end = dst; 4110 } 4111 } 4112 } 4113 4114 *end = '\0'; 4115 4116 /* For "z:", add "." to work around a bug in the C runtime library */ 4117 if (colon == dst - 1) { 4118 path[2] = '.'; 4119 path[3] = '\0'; 4120 } 4121 4122 #ifdef DEBUG 4123 jio_fprintf(stderr, "sysNativePath: %s\n", path); 4124 #endif DEBUG 4125 return path; 4126} 4127 4128// This code is a copy of JDK's sysSetLength 4129// from src/windows/hpi/src/sys_api_md.c 4130 4131int os::ftruncate(int fd, jlong length) { 4132 HANDLE h = (HANDLE)::_get_osfhandle(fd); 4133 long high = (long)(length >> 32); 4134 DWORD ret; 4135 4136 if (h == (HANDLE)(-1)) { 4137 return -1; 4138 } 4139 4140 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN); 4141 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) { 4142 return -1; 4143 } 4144 4145 if (::SetEndOfFile(h) == FALSE) { 4146 return -1; 4147 } 4148 4149 return 0; 4150} 4151 4152 4153// This code is a copy of JDK's sysSync 4154// from src/windows/hpi/src/sys_api_md.c 4155// except for the legacy workaround for a bug in Win 98 4156 4157int os::fsync(int fd) { 4158 HANDLE handle = (HANDLE)::_get_osfhandle(fd); 4159 4160 if ( (!::FlushFileBuffers(handle)) && 4161 (GetLastError() != ERROR_ACCESS_DENIED) ) { 4162 /* from winerror.h */ 4163 return -1; 4164 } 4165 return 0; 4166} 4167 4168static int nonSeekAvailable(int, long *); 4169static int stdinAvailable(int, long *); 4170 4171#define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR) 4172#define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO) 4173 4174// This code is a copy of JDK's sysAvailable 4175// from src/windows/hpi/src/sys_api_md.c 4176 4177int os::available(int fd, jlong *bytes) { 4178 jlong cur, end; 4179 struct _stati64 stbuf64; 4180 4181 if (::_fstati64(fd, &stbuf64) >= 0) { 4182 int mode = stbuf64.st_mode; 4183 if (S_ISCHR(mode) || S_ISFIFO(mode)) { 4184 int ret; 4185 long lpbytes; 4186 if (fd == 0) { 4187 ret = stdinAvailable(fd, &lpbytes); 4188 } else { 4189 ret = nonSeekAvailable(fd, &lpbytes); 4190 } 4191 (*bytes) = (jlong)(lpbytes); 4192 return ret; 4193 } 4194 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) { 4195 return FALSE; 4196 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) { 4197 return FALSE; 4198 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) { 4199 return FALSE; 4200 } 4201 *bytes = end - cur; 4202 return TRUE; 4203 } else { 4204 return FALSE; 4205 } 4206} 4207 4208// This code is a copy of JDK's nonSeekAvailable 4209// from src/windows/hpi/src/sys_api_md.c 4210 4211static int nonSeekAvailable(int fd, long *pbytes) { 4212 /* This is used for available on non-seekable devices 4213 * (like both named and anonymous pipes, such as pipes 4214 * connected to an exec'd process). 4215 * Standard Input is a special case. 4216 * 4217 */ 4218 HANDLE han; 4219 4220 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) { 4221 return FALSE; 4222 } 4223 4224 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) { 4225 /* PeekNamedPipe fails when at EOF. In that case we 4226 * simply make *pbytes = 0 which is consistent with the 4227 * behavior we get on Solaris when an fd is at EOF. 4228 * The only alternative is to raise an Exception, 4229 * which isn't really warranted. 4230 */ 4231 if (::GetLastError() != ERROR_BROKEN_PIPE) { 4232 return FALSE; 4233 } 4234 *pbytes = 0; 4235 } 4236 return TRUE; 4237} 4238 4239#define MAX_INPUT_EVENTS 2000 4240 4241// This code is a copy of JDK's stdinAvailable 4242// from src/windows/hpi/src/sys_api_md.c 4243 4244static int stdinAvailable(int fd, long *pbytes) { 4245 HANDLE han; 4246 DWORD numEventsRead = 0; /* Number of events read from buffer */ 4247 DWORD numEvents = 0; /* Number of events in buffer */ 4248 DWORD i = 0; /* Loop index */ 4249 DWORD curLength = 0; /* Position marker */ 4250 DWORD actualLength = 0; /* Number of bytes readable */ 4251 BOOL error = FALSE; /* Error holder */ 4252 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */ 4253 4254 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) { 4255 return FALSE; 4256 } 4257 4258 /* Construct an array of input records in the console buffer */ 4259 error = ::GetNumberOfConsoleInputEvents(han, &numEvents); 4260 if (error == 0) { 4261 return nonSeekAvailable(fd, pbytes); 4262 } 4263 4264 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */ 4265 if (numEvents > MAX_INPUT_EVENTS) { 4266 numEvents = MAX_INPUT_EVENTS; 4267 } 4268 4269 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD)); 4270 if (lpBuffer == NULL) { 4271 return FALSE; 4272 } 4273 4274 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead); 4275 if (error == 0) { 4276 os::free(lpBuffer); 4277 return FALSE; 4278 } 4279 4280 /* Examine input records for the number of bytes available */ 4281 for(i=0; i<numEvents; i++) { 4282 if (lpBuffer[i].EventType == KEY_EVENT) { 4283 4284 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *) 4285 &(lpBuffer[i].Event); 4286 if (keyRecord->bKeyDown == TRUE) { 4287 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar); 4288 curLength++; 4289 if (*keyPressed == '\r') { 4290 actualLength = curLength; 4291 } 4292 } 4293 } 4294 } 4295 4296 if(lpBuffer != NULL) { 4297 os::free(lpBuffer); 4298 } 4299 4300 *pbytes = (long) actualLength; 4301 return TRUE; 4302} 4303 4304// Map a block of memory. 4305char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4306 char *addr, size_t bytes, bool read_only, 4307 bool allow_exec) { 4308 HANDLE hFile; 4309 char* base; 4310 4311 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, 4312 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 4313 if (hFile == NULL) { 4314 if (PrintMiscellaneous && Verbose) { 4315 DWORD err = GetLastError(); 4316 tty->print_cr("CreateFile() failed: GetLastError->%ld."); 4317 } 4318 return NULL; 4319 } 4320 4321 if (allow_exec) { 4322 // CreateFileMapping/MapViewOfFileEx can't map executable memory 4323 // unless it comes from a PE image (which the shared archive is not.) 4324 // Even VirtualProtect refuses to give execute access to mapped memory 4325 // that was not previously executable. 4326 // 4327 // Instead, stick the executable region in anonymous memory. Yuck. 4328 // Penalty is that ~4 pages will not be shareable - in the future 4329 // we might consider DLLizing the shared archive with a proper PE 4330 // header so that mapping executable + sharing is possible. 4331 4332 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, 4333 PAGE_READWRITE); 4334 if (base == NULL) { 4335 if (PrintMiscellaneous && Verbose) { 4336 DWORD err = GetLastError(); 4337 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); 4338 } 4339 CloseHandle(hFile); 4340 return NULL; 4341 } 4342 4343 DWORD bytes_read; 4344 OVERLAPPED overlapped; 4345 overlapped.Offset = (DWORD)file_offset; 4346 overlapped.OffsetHigh = 0; 4347 overlapped.hEvent = NULL; 4348 // ReadFile guarantees that if the return value is true, the requested 4349 // number of bytes were read before returning. 4350 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; 4351 if (!res) { 4352 if (PrintMiscellaneous && Verbose) { 4353 DWORD err = GetLastError(); 4354 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); 4355 } 4356 release_memory(base, bytes); 4357 CloseHandle(hFile); 4358 return NULL; 4359 } 4360 } else { 4361 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, 4362 NULL /*file_name*/); 4363 if (hMap == NULL) { 4364 if (PrintMiscellaneous && Verbose) { 4365 DWORD err = GetLastError(); 4366 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld."); 4367 } 4368 CloseHandle(hFile); 4369 return NULL; 4370 } 4371 4372 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; 4373 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, 4374 (DWORD)bytes, addr); 4375 if (base == NULL) { 4376 if (PrintMiscellaneous && Verbose) { 4377 DWORD err = GetLastError(); 4378 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); 4379 } 4380 CloseHandle(hMap); 4381 CloseHandle(hFile); 4382 return NULL; 4383 } 4384 4385 if (CloseHandle(hMap) == 0) { 4386 if (PrintMiscellaneous && Verbose) { 4387 DWORD err = GetLastError(); 4388 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); 4389 } 4390 CloseHandle(hFile); 4391 return base; 4392 } 4393 } 4394 4395 if (allow_exec) { 4396 DWORD old_protect; 4397 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; 4398 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; 4399 4400 if (!res) { 4401 if (PrintMiscellaneous && Verbose) { 4402 DWORD err = GetLastError(); 4403 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); 4404 } 4405 // Don't consider this a hard error, on IA32 even if the 4406 // VirtualProtect fails, we should still be able to execute 4407 CloseHandle(hFile); 4408 return base; 4409 } 4410 } 4411 4412 if (CloseHandle(hFile) == 0) { 4413 if (PrintMiscellaneous && Verbose) { 4414 DWORD err = GetLastError(); 4415 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); 4416 } 4417 return base; 4418 } 4419 4420 return base; 4421} 4422 4423 4424// Remap a block of memory. 4425char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 4426 char *addr, size_t bytes, bool read_only, 4427 bool allow_exec) { 4428 // This OS does not allow existing memory maps to be remapped so we 4429 // have to unmap the memory before we remap it. 4430 if (!os::unmap_memory(addr, bytes)) { 4431 return NULL; 4432 } 4433 4434 // There is a very small theoretical window between the unmap_memory() 4435 // call above and the map_memory() call below where a thread in native 4436 // code may be able to access an address that is no longer mapped. 4437 4438 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4439 allow_exec); 4440} 4441 4442 4443// Unmap a block of memory. 4444// Returns true=success, otherwise false. 4445 4446bool os::unmap_memory(char* addr, size_t bytes) { 4447 BOOL result = UnmapViewOfFile(addr); 4448 if (result == 0) { 4449 if (PrintMiscellaneous && Verbose) { 4450 DWORD err = GetLastError(); 4451 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); 4452 } 4453 return false; 4454 } 4455 return true; 4456} 4457 4458void os::pause() { 4459 char filename[MAX_PATH]; 4460 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4461 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4462 } else { 4463 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4464 } 4465 4466 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4467 if (fd != -1) { 4468 struct stat buf; 4469 ::close(fd); 4470 while (::stat(filename, &buf) == 0) { 4471 Sleep(100); 4472 } 4473 } else { 4474 jio_fprintf(stderr, 4475 "Could not open pause file '%s', continuing immediately.\n", filename); 4476 } 4477} 4478 4479// An Event wraps a win32 "CreateEvent" kernel handle. 4480// 4481// We have a number of choices regarding "CreateEvent" win32 handle leakage: 4482// 4483// 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle 4484// field, and call CloseHandle() on the win32 event handle. Unpark() would 4485// need to be modified to tolerate finding a NULL (invalid) win32 event handle. 4486// In addition, an unpark() operation might fetch the handle field, but the 4487// event could recycle between the fetch and the SetEvent() operation. 4488// SetEvent() would either fail because the handle was invalid, or inadvertently work, 4489// as the win32 handle value had been recycled. In an ideal world calling SetEvent() 4490// on an stale but recycled handle would be harmless, but in practice this might 4491// confuse other non-Sun code, so it's not a viable approach. 4492// 4493// 2: Once a win32 event handle is associated with an Event, it remains associated 4494// with the Event. The event handle is never closed. This could be construed 4495// as handle leakage, but only up to the maximum # of threads that have been extant 4496// at any one time. This shouldn't be an issue, as windows platforms typically 4497// permit a process to have hundreds of thousands of open handles. 4498// 4499// 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList 4500// and release unused handles. 4501// 4502// 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. 4503// It's not clear, however, that we wouldn't be trading one type of leak for another. 4504// 4505// 5. Use an RCU-like mechanism (Read-Copy Update). 4506// Or perhaps something similar to Maged Michael's "Hazard pointers". 4507// 4508// We use (2). 4509// 4510// TODO-FIXME: 4511// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. 4512// 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks 4513// to recover from (or at least detect) the dreaded Windows 841176 bug. 4514// 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent 4515// into a single win32 CreateEvent() handle. 4516// 4517// _Event transitions in park() 4518// -1 => -1 : illegal 4519// 1 => 0 : pass - return immediately 4520// 0 => -1 : block 4521// 4522// _Event serves as a restricted-range semaphore : 4523// -1 : thread is blocked 4524// 0 : neutral - thread is running or ready 4525// 1 : signaled - thread is running or ready 4526// 4527// Another possible encoding of _Event would be 4528// with explicit "PARKED" and "SIGNALED" bits. 4529 4530int os::PlatformEvent::park (jlong Millis) { 4531 guarantee (_ParkHandle != NULL , "Invariant") ; 4532 guarantee (Millis > 0 , "Invariant") ; 4533 int v ; 4534 4535 // CONSIDER: defer assigning a CreateEvent() handle to the Event until 4536 // the initial park() operation. 4537 4538 for (;;) { 4539 v = _Event ; 4540 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4541 } 4542 guarantee ((v == 0) || (v == 1), "invariant") ; 4543 if (v != 0) return OS_OK ; 4544 4545 // Do this the hard way by blocking ... 4546 // TODO: consider a brief spin here, gated on the success of recent 4547 // spin attempts by this thread. 4548 // 4549 // We decompose long timeouts into series of shorter timed waits. 4550 // Evidently large timo values passed in WaitForSingleObject() are problematic on some 4551 // versions of Windows. See EventWait() for details. This may be superstition. Or not. 4552 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time 4553 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from 4554 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend 4555 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == 4556 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate 4557 // for the already waited time. This policy does not admit any new outcomes. 4558 // In the future, however, we might want to track the accumulated wait time and 4559 // adjust Millis accordingly if we encounter a spurious wakeup. 4560 4561 const int MAXTIMEOUT = 0x10000000 ; 4562 DWORD rv = WAIT_TIMEOUT ; 4563 while (_Event < 0 && Millis > 0) { 4564 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) 4565 if (Millis > MAXTIMEOUT) { 4566 prd = MAXTIMEOUT ; 4567 } 4568 rv = ::WaitForSingleObject (_ParkHandle, prd) ; 4569 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; 4570 if (rv == WAIT_TIMEOUT) { 4571 Millis -= prd ; 4572 } 4573 } 4574 v = _Event ; 4575 _Event = 0 ; 4576 OrderAccess::fence() ; 4577 // If we encounter a nearly simultanous timeout expiry and unpark() 4578 // we return OS_OK indicating we awoke via unpark(). 4579 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. 4580 return (v >= 0) ? OS_OK : OS_TIMEOUT ; 4581} 4582 4583void os::PlatformEvent::park () { 4584 guarantee (_ParkHandle != NULL, "Invariant") ; 4585 // Invariant: Only the thread associated with the Event/PlatformEvent 4586 // may call park(). 4587 int v ; 4588 for (;;) { 4589 v = _Event ; 4590 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4591 } 4592 guarantee ((v == 0) || (v == 1), "invariant") ; 4593 if (v != 0) return ; 4594 4595 // Do this the hard way by blocking ... 4596 // TODO: consider a brief spin here, gated on the success of recent 4597 // spin attempts by this thread. 4598 while (_Event < 0) { 4599 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; 4600 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; 4601 } 4602 4603 // Usually we'll find _Event == 0 at this point, but as 4604 // an optional optimization we clear it, just in case can 4605 // multiple unpark() operations drove _Event up to 1. 4606 _Event = 0 ; 4607 OrderAccess::fence() ; 4608 guarantee (_Event >= 0, "invariant") ; 4609} 4610 4611void os::PlatformEvent::unpark() { 4612 guarantee (_ParkHandle != NULL, "Invariant") ; 4613 int v ; 4614 for (;;) { 4615 v = _Event ; // Increment _Event if it's < 1. 4616 if (v > 0) { 4617 // If it's already signaled just return. 4618 // The LD of _Event could have reordered or be satisfied 4619 // by a read-aside from this processor's write buffer. 4620 // To avoid problems execute a barrier and then 4621 // ratify the value. A degenerate CAS() would also work. 4622 // Viz., CAS (v+0, &_Event, v) == v). 4623 OrderAccess::fence() ; 4624 if (_Event == v) return ; 4625 continue ; 4626 } 4627 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 4628 } 4629 if (v < 0) { 4630 ::SetEvent (_ParkHandle) ; 4631 } 4632} 4633 4634 4635// JSR166 4636// ------------------------------------------------------- 4637 4638/* 4639 * The Windows implementation of Park is very straightforward: Basic 4640 * operations on Win32 Events turn out to have the right semantics to 4641 * use them directly. We opportunistically resuse the event inherited 4642 * from Monitor. 4643 */ 4644 4645 4646void Parker::park(bool isAbsolute, jlong time) { 4647 guarantee (_ParkEvent != NULL, "invariant") ; 4648 // First, demultiplex/decode time arguments 4649 if (time < 0) { // don't wait 4650 return; 4651 } 4652 else if (time == 0 && !isAbsolute) { 4653 time = INFINITE; 4654 } 4655 else if (isAbsolute) { 4656 time -= os::javaTimeMillis(); // convert to relative time 4657 if (time <= 0) // already elapsed 4658 return; 4659 } 4660 else { // relative 4661 time /= 1000000; // Must coarsen from nanos to millis 4662 if (time == 0) // Wait for the minimal time unit if zero 4663 time = 1; 4664 } 4665 4666 JavaThread* thread = (JavaThread*)(Thread::current()); 4667 assert(thread->is_Java_thread(), "Must be JavaThread"); 4668 JavaThread *jt = (JavaThread *)thread; 4669 4670 // Don't wait if interrupted or already triggered 4671 if (Thread::is_interrupted(thread, false) || 4672 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { 4673 ResetEvent(_ParkEvent); 4674 return; 4675 } 4676 else { 4677 ThreadBlockInVM tbivm(jt); 4678 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 4679 jt->set_suspend_equivalent(); 4680 4681 WaitForSingleObject(_ParkEvent, time); 4682 ResetEvent(_ParkEvent); 4683 4684 // If externally suspended while waiting, re-suspend 4685 if (jt->handle_special_suspend_equivalent_condition()) { 4686 jt->java_suspend_self(); 4687 } 4688 } 4689} 4690 4691void Parker::unpark() { 4692 guarantee (_ParkEvent != NULL, "invariant") ; 4693 SetEvent(_ParkEvent); 4694} 4695 4696// Run the specified command in a separate process. Return its exit value, 4697// or -1 on failure (e.g. can't create a new process). 4698int os::fork_and_exec(char* cmd) { 4699 STARTUPINFO si; 4700 PROCESS_INFORMATION pi; 4701 4702 memset(&si, 0, sizeof(si)); 4703 si.cb = sizeof(si); 4704 memset(&pi, 0, sizeof(pi)); 4705 BOOL rslt = CreateProcess(NULL, // executable name - use command line 4706 cmd, // command line 4707 NULL, // process security attribute 4708 NULL, // thread security attribute 4709 TRUE, // inherits system handles 4710 0, // no creation flags 4711 NULL, // use parent's environment block 4712 NULL, // use parent's starting directory 4713 &si, // (in) startup information 4714 &pi); // (out) process information 4715 4716 if (rslt) { 4717 // Wait until child process exits. 4718 WaitForSingleObject(pi.hProcess, INFINITE); 4719 4720 DWORD exit_code; 4721 GetExitCodeProcess(pi.hProcess, &exit_code); 4722 4723 // Close process and thread handles. 4724 CloseHandle(pi.hProcess); 4725 CloseHandle(pi.hThread); 4726 4727 return (int)exit_code; 4728 } else { 4729 return -1; 4730 } 4731} 4732 4733//-------------------------------------------------------------------------------------------------- 4734// Non-product code 4735 4736static int mallocDebugIntervalCounter = 0; 4737static int mallocDebugCounter = 0; 4738bool os::check_heap(bool force) { 4739 if (++mallocDebugCounter < MallocVerifyStart && !force) return true; 4740 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { 4741 // Note: HeapValidate executes two hardware breakpoints when it finds something 4742 // wrong; at these points, eax contains the address of the offending block (I think). 4743 // To get to the exlicit error message(s) below, just continue twice. 4744 HANDLE heap = GetProcessHeap(); 4745 { HeapLock(heap); 4746 PROCESS_HEAP_ENTRY phe; 4747 phe.lpData = NULL; 4748 while (HeapWalk(heap, &phe) != 0) { 4749 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && 4750 !HeapValidate(heap, 0, phe.lpData)) { 4751 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); 4752 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); 4753 fatal("corrupted C heap"); 4754 } 4755 } 4756 DWORD err = GetLastError(); 4757 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { 4758 fatal(err_msg("heap walk aborted with error %d", err)); 4759 } 4760 HeapUnlock(heap); 4761 } 4762 mallocDebugIntervalCounter = 0; 4763 } 4764 return true; 4765} 4766 4767 4768bool os::find(address addr, outputStream* st) { 4769 // Nothing yet 4770 return false; 4771} 4772 4773LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { 4774 DWORD exception_code = e->ExceptionRecord->ExceptionCode; 4775 4776 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 4777 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); 4778 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; 4779 address addr = (address) exceptionRecord->ExceptionInformation[1]; 4780 4781 if (os::is_memory_serialize_page(thread, addr)) 4782 return EXCEPTION_CONTINUE_EXECUTION; 4783 } 4784 4785 return EXCEPTION_CONTINUE_SEARCH; 4786} 4787 4788// We don't build a headless jre for Windows 4789bool os::is_headless_jre() { return false; } 4790 4791 4792typedef CRITICAL_SECTION mutex_t; 4793#define mutexInit(m) InitializeCriticalSection(m) 4794#define mutexDestroy(m) DeleteCriticalSection(m) 4795#define mutexLock(m) EnterCriticalSection(m) 4796#define mutexUnlock(m) LeaveCriticalSection(m) 4797 4798static bool sock_initialized = FALSE; 4799static mutex_t sockFnTableMutex; 4800 4801static void initSock() { 4802 WSADATA wsadata; 4803 4804 if (!os::WinSock2Dll::WinSock2Available()) { 4805 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n", 4806 ::GetLastError()); 4807 return; 4808 } 4809 if (sock_initialized == TRUE) return; 4810 4811 ::mutexInit(&sockFnTableMutex); 4812 ::mutexLock(&sockFnTableMutex); 4813 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) { 4814 jio_fprintf(stderr, "Could not initialize Winsock\n"); 4815 } 4816 sock_initialized = TRUE; 4817 ::mutexUnlock(&sockFnTableMutex); 4818} 4819 4820struct hostent* os::get_host_by_name(char* name) { 4821 if (!sock_initialized) { 4822 initSock(); 4823 } 4824 if (!os::WinSock2Dll::WinSock2Available()) { 4825 return NULL; 4826 } 4827 return (struct hostent*)os::WinSock2Dll::gethostbyname(name); 4828} 4829 4830 4831int os::socket_close(int fd) { 4832 ShouldNotReachHere(); 4833 return 0; 4834} 4835 4836int os::socket_available(int fd, jint *pbytes) { 4837 ShouldNotReachHere(); 4838 return 0; 4839} 4840 4841int os::socket(int domain, int type, int protocol) { 4842 ShouldNotReachHere(); 4843 return 0; 4844} 4845 4846int os::listen(int fd, int count) { 4847 ShouldNotReachHere(); 4848 return 0; 4849} 4850 4851int os::connect(int fd, struct sockaddr* him, socklen_t len) { 4852 ShouldNotReachHere(); 4853 return 0; 4854} 4855 4856int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 4857 ShouldNotReachHere(); 4858 return 0; 4859} 4860 4861int os::sendto(int fd, char* buf, size_t len, uint flags, 4862 struct sockaddr* to, socklen_t tolen) { 4863 ShouldNotReachHere(); 4864 return 0; 4865} 4866 4867int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags, 4868 sockaddr* from, socklen_t* fromlen) { 4869 ShouldNotReachHere(); 4870 return 0; 4871} 4872 4873int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 4874 ShouldNotReachHere(); 4875 return 0; 4876} 4877 4878int os::send(int fd, char* buf, size_t nBytes, uint flags) { 4879 ShouldNotReachHere(); 4880 return 0; 4881} 4882 4883int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 4884 ShouldNotReachHere(); 4885 return 0; 4886} 4887 4888int os::timeout(int fd, long timeout) { 4889 ShouldNotReachHere(); 4890 return 0; 4891} 4892 4893int os::get_host_name(char* name, int namelen) { 4894 ShouldNotReachHere(); 4895 return 0; 4896} 4897 4898int os::socket_shutdown(int fd, int howto) { 4899 ShouldNotReachHere(); 4900 return 0; 4901} 4902 4903int os::bind(int fd, struct sockaddr* him, socklen_t len) { 4904 ShouldNotReachHere(); 4905 return 0; 4906} 4907 4908int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 4909 ShouldNotReachHere(); 4910 return 0; 4911} 4912 4913int os::get_sock_opt(int fd, int level, int optname, 4914 char* optval, socklen_t* optlen) { 4915 ShouldNotReachHere(); 4916 return 0; 4917} 4918 4919int os::set_sock_opt(int fd, int level, int optname, 4920 const char* optval, socklen_t optlen) { 4921 ShouldNotReachHere(); 4922 return 0; 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); 4931 4932GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL; 4933VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL; 4934GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL; 4935GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL; 4936BOOL os::Kernel32Dll::initialized = FALSE; 4937SIZE_T os::Kernel32Dll::GetLargePageMinimum() { 4938 assert(initialized && _GetLargePageMinimum != NULL, 4939 "GetLargePageMinimumAvailable() not yet called"); 4940 return _GetLargePageMinimum(); 4941} 4942 4943BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() { 4944 if (!initialized) { 4945 initialize(); 4946 } 4947 return _GetLargePageMinimum != NULL; 4948} 4949 4950BOOL os::Kernel32Dll::NumaCallsAvailable() { 4951 if (!initialized) { 4952 initialize(); 4953 } 4954 return _VirtualAllocExNuma != NULL; 4955} 4956 4957LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) { 4958 assert(initialized && _VirtualAllocExNuma != NULL, 4959 "NUMACallsAvailable() not yet called"); 4960 4961 return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node); 4962} 4963 4964BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) { 4965 assert(initialized && _GetNumaHighestNodeNumber != NULL, 4966 "NUMACallsAvailable() not yet called"); 4967 4968 return _GetNumaHighestNodeNumber(ptr_highest_node_number); 4969} 4970 4971BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) { 4972 assert(initialized && _GetNumaNodeProcessorMask != NULL, 4973 "NUMACallsAvailable() not yet called"); 4974 4975 return _GetNumaNodeProcessorMask(node, proc_mask); 4976} 4977 4978 4979void os::Kernel32Dll::initializeCommon() { 4980 if (!initialized) { 4981 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 4982 assert(handle != NULL, "Just check"); 4983 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum"); 4984 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma"); 4985 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber"); 4986 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask"); 4987 initialized = TRUE; 4988 } 4989} 4990 4991 4992 4993#ifndef JDK6_OR_EARLIER 4994 4995void os::Kernel32Dll::initialize() { 4996 initializeCommon(); 4997} 4998 4999 5000// Kernel32 API 5001inline BOOL os::Kernel32Dll::SwitchToThread() { 5002 return ::SwitchToThread(); 5003} 5004 5005inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5006 return true; 5007} 5008 5009 // Help tools 5010inline BOOL os::Kernel32Dll::HelpToolsAvailable() { 5011 return true; 5012} 5013 5014inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5015 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5016} 5017 5018inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5019 return ::Module32First(hSnapshot, lpme); 5020} 5021 5022inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5023 return ::Module32Next(hSnapshot, lpme); 5024} 5025 5026 5027inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5028 return true; 5029} 5030 5031inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5032 ::GetNativeSystemInfo(lpSystemInfo); 5033} 5034 5035// PSAPI API 5036inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5037 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5038} 5039 5040inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5041 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5042} 5043 5044inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5045 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5046} 5047 5048inline BOOL os::PSApiDll::PSApiAvailable() { 5049 return true; 5050} 5051 5052 5053// WinSock2 API 5054inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5055 return ::WSAStartup(wVersionRequested, lpWSAData); 5056} 5057 5058inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5059 return ::gethostbyname(name); 5060} 5061 5062inline BOOL os::WinSock2Dll::WinSock2Available() { 5063 return true; 5064} 5065 5066// Advapi API 5067inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5068 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5069 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5070 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5071 BufferLength, PreviousState, ReturnLength); 5072} 5073 5074inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5075 PHANDLE TokenHandle) { 5076 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5077} 5078 5079inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5080 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5081} 5082 5083inline BOOL os::Advapi32Dll::AdvapiAvailable() { 5084 return true; 5085} 5086 5087#else 5088// Kernel32 API 5089typedef BOOL (WINAPI* SwitchToThread_Fn)(void); 5090typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD); 5091typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32); 5092typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32); 5093typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO); 5094 5095SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL; 5096CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL; 5097Module32First_Fn os::Kernel32Dll::_Module32First = NULL; 5098Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL; 5099GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL; 5100 5101 5102void os::Kernel32Dll::initialize() { 5103 if (!initialized) { 5104 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 5105 assert(handle != NULL, "Just check"); 5106 5107 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread"); 5108 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn) 5109 ::GetProcAddress(handle, "CreateToolhelp32Snapshot"); 5110 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First"); 5111 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next"); 5112 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo"); 5113 initializeCommon(); // resolve the functions that always need resolving 5114 5115 initialized = TRUE; 5116 } 5117} 5118 5119BOOL os::Kernel32Dll::SwitchToThread() { 5120 assert(initialized && _SwitchToThread != NULL, 5121 "SwitchToThreadAvailable() not yet called"); 5122 return _SwitchToThread(); 5123} 5124 5125 5126BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5127 if (!initialized) { 5128 initialize(); 5129 } 5130 return _SwitchToThread != NULL; 5131} 5132 5133// Help tools 5134BOOL os::Kernel32Dll::HelpToolsAvailable() { 5135 if (!initialized) { 5136 initialize(); 5137 } 5138 return _CreateToolhelp32Snapshot != NULL && 5139 _Module32First != NULL && 5140 _Module32Next != NULL; 5141} 5142 5143HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5144 assert(initialized && _CreateToolhelp32Snapshot != NULL, 5145 "HelpToolsAvailable() not yet called"); 5146 5147 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5148} 5149 5150BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5151 assert(initialized && _Module32First != NULL, 5152 "HelpToolsAvailable() not yet called"); 5153 5154 return _Module32First(hSnapshot, lpme); 5155} 5156 5157inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5158 assert(initialized && _Module32Next != NULL, 5159 "HelpToolsAvailable() not yet called"); 5160 5161 return _Module32Next(hSnapshot, lpme); 5162} 5163 5164 5165BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5166 if (!initialized) { 5167 initialize(); 5168 } 5169 return _GetNativeSystemInfo != NULL; 5170} 5171 5172void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5173 assert(initialized && _GetNativeSystemInfo != NULL, 5174 "GetNativeSystemInfoAvailable() not yet called"); 5175 5176 _GetNativeSystemInfo(lpSystemInfo); 5177} 5178 5179 5180 5181// PSAPI API 5182 5183 5184typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD); 5185typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);; 5186typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD); 5187 5188EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL; 5189GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL; 5190GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL; 5191BOOL os::PSApiDll::initialized = FALSE; 5192 5193void os::PSApiDll::initialize() { 5194 if (!initialized) { 5195 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0); 5196 if (handle != NULL) { 5197 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle, 5198 "EnumProcessModules"); 5199 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle, 5200 "GetModuleFileNameExA"); 5201 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle, 5202 "GetModuleInformation"); 5203 } 5204 initialized = TRUE; 5205 } 5206} 5207 5208 5209 5210BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5211 assert(initialized && _EnumProcessModules != NULL, 5212 "PSApiAvailable() not yet called"); 5213 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5214} 5215 5216DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5217 assert(initialized && _GetModuleFileNameEx != NULL, 5218 "PSApiAvailable() not yet called"); 5219 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5220} 5221 5222BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5223 assert(initialized && _GetModuleInformation != NULL, 5224 "PSApiAvailable() not yet called"); 5225 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5226} 5227 5228BOOL os::PSApiDll::PSApiAvailable() { 5229 if (!initialized) { 5230 initialize(); 5231 } 5232 return _EnumProcessModules != NULL && 5233 _GetModuleFileNameEx != NULL && 5234 _GetModuleInformation != NULL; 5235} 5236 5237 5238// WinSock2 API 5239typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA); 5240typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...); 5241 5242WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL; 5243gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL; 5244BOOL os::WinSock2Dll::initialized = FALSE; 5245 5246void os::WinSock2Dll::initialize() { 5247 if (!initialized) { 5248 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0); 5249 if (handle != NULL) { 5250 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup"); 5251 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname"); 5252 } 5253 initialized = TRUE; 5254 } 5255} 5256 5257 5258BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5259 assert(initialized && _WSAStartup != NULL, 5260 "WinSock2Available() not yet called"); 5261 return _WSAStartup(wVersionRequested, lpWSAData); 5262} 5263 5264struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5265 assert(initialized && _gethostbyname != NULL, 5266 "WinSock2Available() not yet called"); 5267 return _gethostbyname(name); 5268} 5269 5270BOOL os::WinSock2Dll::WinSock2Available() { 5271 if (!initialized) { 5272 initialize(); 5273 } 5274 return _WSAStartup != NULL && 5275 _gethostbyname != NULL; 5276} 5277 5278typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 5279typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE); 5280typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID); 5281 5282AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL; 5283OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL; 5284LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL; 5285BOOL os::Advapi32Dll::initialized = FALSE; 5286 5287void os::Advapi32Dll::initialize() { 5288 if (!initialized) { 5289 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0); 5290 if (handle != NULL) { 5291 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle, 5292 "AdjustTokenPrivileges"); 5293 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle, 5294 "OpenProcessToken"); 5295 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle, 5296 "LookupPrivilegeValueA"); 5297 } 5298 initialized = TRUE; 5299 } 5300} 5301 5302BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5303 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5304 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5305 assert(initialized && _AdjustTokenPrivileges != NULL, 5306 "AdvapiAvailable() not yet called"); 5307 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5308 BufferLength, PreviousState, ReturnLength); 5309} 5310 5311BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5312 PHANDLE TokenHandle) { 5313 assert(initialized && _OpenProcessToken != NULL, 5314 "AdvapiAvailable() not yet called"); 5315 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5316} 5317 5318BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5319 assert(initialized && _LookupPrivilegeValue != NULL, 5320 "AdvapiAvailable() not yet called"); 5321 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5322} 5323 5324BOOL os::Advapi32Dll::AdvapiAvailable() { 5325 if (!initialized) { 5326 initialize(); 5327 } 5328 return _AdjustTokenPrivileges != NULL && 5329 _OpenProcessToken != NULL && 5330 _LookupPrivilegeValue != NULL; 5331} 5332 5333#endif 5334 5335