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