os_windows.cpp revision 4036:22ba8c8ce6a6
1184610Salfred/* 2184610Salfred * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3184610Salfred * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4184610Salfred * 5184610Salfred * This code is free software; you can redistribute it and/or modify it 6184610Salfred * under the terms of the GNU General Public License version 2 only, as 7184610Salfred * published by the Free Software Foundation. 8184610Salfred * 9184610Salfred * This code is distributed in the hope that it will be useful, but WITHOUT 10184610Salfred * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11184610Salfred * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12184610Salfred * version 2 for more details (a copy is included in the LICENSE file that 13184610Salfred * accompanied this code). 14184610Salfred * 15184610Salfred * You should have received a copy of the GNU General Public License version 16184610Salfred * 2 along with this work; if not, write to the Free Software Foundation, 17184610Salfred * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18184610Salfred * 19184610Salfred * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20184610Salfred * or visit www.oracle.com if you need additional information or have any 21184610Salfred * questions. 22184610Salfred * 23184610Salfred */ 24184610Salfred 25184610Salfred// Must be at least Windows 2000 or XP to use IsDebuggerPresent 26184610Salfred#define _WIN32_WINNT 0x500 27184610Salfred 28184610Salfred// no precompiled headers 29184610Salfred#include "classfile/classLoader.hpp" 30184610Salfred#include "classfile/systemDictionary.hpp" 31184610Salfred#include "classfile/vmSymbols.hpp" 32184610Salfred#include "code/icBuffer.hpp" 33184610Salfred#include "code/vtableStubs.hpp" 34184610Salfred#include "compiler/compileBroker.hpp" 35184610Salfred#include "compiler/disassembler.hpp" 36184610Salfred#include "interpreter/interpreter.hpp" 37184610Salfred#include "jvm_windows.h" 38184610Salfred#include "memory/allocation.inline.hpp" 39184610Salfred#include "memory/filemap.hpp" 40184610Salfred#include "mutex_windows.inline.hpp" 41184610Salfred#include "oops/oop.inline.hpp" 42184610Salfred#include "os_share_windows.hpp" 43184610Salfred#include "prims/jniFastGetField.hpp" 44184610Salfred#include "prims/jvm.h" 45188746Sthompsa#include "prims/jvm_misc.hpp" 46188942Sthompsa#include "runtime/arguments.hpp" 47188942Sthompsa#include "runtime/extendedPC.hpp" 48188942Sthompsa#include "runtime/globals.hpp" 49188942Sthompsa#include "runtime/interfaceSupport.hpp" 50184610Salfred#include "runtime/java.hpp" 51184610Salfred#include "runtime/javaCalls.hpp" 52184610Salfred#include "runtime/mutexLocker.hpp" 53188942Sthompsa#include "runtime/objectMonitor.hpp" 54188942Sthompsa#include "runtime/osThread.hpp" 55188942Sthompsa#include "runtime/perfMemory.hpp" 56188942Sthompsa#include "runtime/sharedRuntime.hpp" 57188942Sthompsa#include "runtime/statSampler.hpp" 58188942Sthompsa#include "runtime/stubRoutines.hpp" 59188942Sthompsa#include "runtime/thread.inline.hpp" 60188942Sthompsa#include "runtime/threadCritical.hpp" 61188942Sthompsa#include "runtime/timer.hpp" 62188942Sthompsa#include "services/attachListener.hpp" 63188942Sthompsa#include "services/runtimeService.hpp" 64184610Salfred#include "utilities/decoder.hpp" 65188942Sthompsa#include "utilities/defaultStream.hpp" 66184610Salfred#include "utilities/events.hpp" 67184610Salfred#include "utilities/growableArray.hpp" 68184610Salfred#include "utilities/vmError.hpp" 69184610Salfred 70184610Salfred#ifdef _DEBUG 71184610Salfred#include <crtdbg.h> 72184610Salfred#endif 73184610Salfred 74184610Salfred 75184610Salfred#include <windows.h> 76184610Salfred#include <sys/types.h> 77184610Salfred#include <sys/stat.h> 78184610Salfred#include <sys/timeb.h> 79184610Salfred#include <objidl.h> 80184610Salfred#include <shlobj.h> 81184610Salfred 82184610Salfred#include <malloc.h> 83184610Salfred#include <signal.h> 84184610Salfred#include <direct.h> 85184610Salfred#include <errno.h> 86184610Salfred#include <fcntl.h> 87184610Salfred#include <io.h> 88187259Sthompsa#include <process.h> // For _beginthreadex(), _endthreadex() 89187259Sthompsa#include <imagehlp.h> // For os::dll_address_to_function_name 90188981Sthompsa/* for enumerating dll libraries */ 91187259Sthompsa#include <vdmdbg.h> 92187259Sthompsa 93184610Salfred// for timer info max values which include all bits 94184610Salfred#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 95184610Salfred 96184610Salfred// For DLL loading/load error detection 97184610Salfred// Values of PE COFF 98184610Salfred#define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c 99184610Salfred#define IMAGE_FILE_SIGNATURE_LENGTH 4 100184610Salfred 101184610Salfredstatic HANDLE main_process; 102184610Salfredstatic HANDLE main_thread; 103184610Salfredstatic int main_thread_id; 104184610Salfred 105184610Salfredstatic FILETIME process_creation_time; 106184610Salfredstatic FILETIME process_exit_time; 107184610Salfredstatic FILETIME process_user_time; 108184610Salfredstatic FILETIME process_kernel_time; 109184610Salfred 110184610Salfred#ifdef _M_IA64 111184610Salfred#define __CPU__ ia64 112184610Salfred#elif _M_AMD64 113184610Salfred#define __CPU__ amd64 114184610Salfred#else 115188981Sthompsa#define __CPU__ i486 116188981Sthompsa#endif 117184610Salfred 118184610Salfred// save DLL module handle, used by GetModuleFileName 119184610Salfred 120184610SalfredHINSTANCE vm_lib_handle; 121184610Salfred 122184610SalfredBOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { 123184610Salfred switch (reason) { 124184610Salfred case DLL_PROCESS_ATTACH: 125184610Salfred vm_lib_handle = hinst; 126184610Salfred if(ForceTimeHighResolution) 127184610Salfred timeBeginPeriod(1L); 128184610Salfred break; 129184610Salfred case DLL_PROCESS_DETACH: 130184610Salfred if(ForceTimeHighResolution) 131184610Salfred timeEndPeriod(1L); 132184610Salfred break; 133184610Salfred default: 134184610Salfred break; 135184610Salfred } 136184610Salfred return true; 137184610Salfred} 138184610Salfred 139184610Salfredstatic inline double fileTimeAsDouble(FILETIME* time) { 140184610Salfred const double high = (double) ((unsigned int) ~0); 141184610Salfred const double split = 10000000.0; 142184610Salfred double result = (time->dwLowDateTime / split) + 143184610Salfred time->dwHighDateTime * (high/split); 144184610Salfred return result; 145184610Salfred} 146184610Salfred 147184610Salfred// Implementation of os 148184610Salfred 149184610Salfredbool os::getenv(const char* name, char* buffer, int len) { 150184610Salfred int result = GetEnvironmentVariable(name, buffer, len); 151184610Salfred return result > 0 && result < len; 152184610Salfred} 153184610Salfred 154184610Salfred 155184610Salfred// No setuid programs under Windows. 156184610Salfredbool os::have_special_privileges() { 157184610Salfred return false; 158184610Salfred} 159184610Salfred 160184610Salfred 161184610Salfred// This method is a periodic task to check for misbehaving JNI applications 162184610Salfred// under CheckJNI, we can add any periodic checks here. 163184610Salfred// For Windows at the moment does nothing 164184610Salfredvoid os::run_periodic_checks() { 165184610Salfred return; 166184610Salfred} 167184610Salfred 168184610Salfred#ifndef _WIN64 169184610Salfred// previous UnhandledExceptionFilter, if there is one 170184610Salfredstatic LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL; 171184610Salfred 172184610SalfredLONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); 173184610Salfred#endif 174184610Salfredvoid os::init_system_properties_values() { 175184610Salfred /* sysclasspath, java_home, dll_dir */ 176184610Salfred { 177184610Salfred char *home_path; 178184610Salfred char *dll_path; 179184610Salfred char *pslash; 180184610Salfred char *bin = "\\bin"; 181188981Sthompsa char home_dir[MAX_PATH]; 182184610Salfred 183188981Sthompsa if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { 184184610Salfred os::jvm_path(home_dir, sizeof(home_dir)); 185184610Salfred // Found the full path to jvm.dll. 186184610Salfred // Now cut the path to <java_home>/jre if we can. 187184610Salfred *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ 188184610Salfred pslash = strrchr(home_dir, '\\'); 189184610Salfred if (pslash != NULL) { 190184610Salfred *pslash = '\0'; /* get rid of \{client|server} */ 191184610Salfred pslash = strrchr(home_dir, '\\'); 192184610Salfred if (pslash != NULL) 193184610Salfred *pslash = '\0'; /* get rid of \bin */ 194188981Sthompsa } 195188981Sthompsa } 196188981Sthompsa 197188981Sthompsa home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1, mtInternal); 198188981Sthompsa if (home_path == NULL) 199184610Salfred return; 200188981Sthompsa strcpy(home_path, home_dir); 201188981Sthompsa Arguments::set_java_home(home_path); 202188981Sthompsa 203188981Sthompsa dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1, mtInternal); 204188981Sthompsa if (dll_path == NULL) 205184610Salfred return; 206184610Salfred strcpy(dll_path, home_dir); 207188981Sthompsa strcat(dll_path, bin); 208188981Sthompsa Arguments::set_dll_dir(dll_path); 209188981Sthompsa 210188981Sthompsa if (!set_boot_path('\\', ';')) 211184610Salfred return; 212184610Salfred } 213184610Salfred 214184610Salfred /* library_path */ 215184610Salfred #define EXT_DIR "\\lib\\ext" 216184610Salfred #define BIN_DIR "\\bin" 217184610Salfred #define PACKAGE_DIR "\\Sun\\Java" 218184610Salfred { 219184610Salfred /* Win32 library search order (See the documentation for LoadLibrary): 220184610Salfred * 221184610Salfred * 1. The directory from which application is loaded. 222184610Salfred * 2. The system wide Java Extensions directory (Java only) 223184610Salfred * 3. System directory (GetSystemDirectory) 224184610Salfred * 4. Windows directory (GetWindowsDirectory) 225184610Salfred * 5. The PATH environment variable 226184610Salfred * 6. The current directory 227184610Salfred */ 228184610Salfred 229184610Salfred char *library_path; 230184610Salfred char tmp[MAX_PATH]; 231184610Salfred char *path_str = ::getenv("PATH"); 232184610Salfred 233184610Salfred library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + 234184610Salfred sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10, mtInternal); 235184610Salfred 236184610Salfred library_path[0] = '\0'; 237184610Salfred 238184610Salfred GetModuleFileName(NULL, tmp, sizeof(tmp)); 239184610Salfred *(strrchr(tmp, '\\')) = '\0'; 240184610Salfred strcat(library_path, tmp); 241184610Salfred 242184610Salfred GetWindowsDirectory(tmp, sizeof(tmp)); 243184610Salfred strcat(library_path, ";"); 244184610Salfred strcat(library_path, tmp); 245184610Salfred strcat(library_path, PACKAGE_DIR BIN_DIR); 246184610Salfred 247184610Salfred GetSystemDirectory(tmp, sizeof(tmp)); 248184610Salfred strcat(library_path, ";"); 249184610Salfred strcat(library_path, tmp); 250184610Salfred 251184610Salfred GetWindowsDirectory(tmp, sizeof(tmp)); 252184610Salfred strcat(library_path, ";"); 253184610Salfred strcat(library_path, tmp); 254184610Salfred 255184610Salfred if (path_str) { 256184610Salfred strcat(library_path, ";"); 257184610Salfred strcat(library_path, path_str); 258184610Salfred } 259184610Salfred 260184610Salfred strcat(library_path, ";."); 261184610Salfred 262184610Salfred Arguments::set_library_path(library_path); 263184610Salfred FREE_C_HEAP_ARRAY(char, library_path, mtInternal); 264184610Salfred } 265184610Salfred 266184610Salfred /* Default extensions directory */ 267184610Salfred { 268184610Salfred char path[MAX_PATH]; 269184610Salfred char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; 270184610Salfred GetWindowsDirectory(path, MAX_PATH); 271184610Salfred sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, 272184610Salfred path, PACKAGE_DIR, EXT_DIR); 273184610Salfred Arguments::set_ext_dirs(buf); 274184610Salfred } 275184610Salfred #undef EXT_DIR 276188981Sthompsa #undef BIN_DIR 277188981Sthompsa #undef PACKAGE_DIR 278188981Sthompsa 279188981Sthompsa /* Default endorsed standards directory. */ 280188981Sthompsa { 281188981Sthompsa #define ENDORSED_DIR "\\lib\\endorsed" 282188981Sthompsa size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); 283188981Sthompsa char * buf = NEW_C_HEAP_ARRAY(char, len, mtInternal); 284184610Salfred sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); 285184610Salfred Arguments::set_endorsed_dirs(buf); 286184610Salfred #undef ENDORSED_DIR 287184610Salfred } 288184610Salfred 289184610Salfred#ifndef _WIN64 290184610Salfred // set our UnhandledExceptionFilter and save any previous one 291184610Salfred prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception); 292184610Salfred#endif 293184610Salfred 294184610Salfred // Done 295184610Salfred return; 296184610Salfred} 297184610Salfred 298184610Salfredvoid os::breakpoint() { 299184610Salfred DebugBreak(); 300188981Sthompsa} 301188981Sthompsa 302188981Sthompsa// Invoked from the BREAKPOINT Macro 303188981Sthompsaextern "C" void breakpoint() { 304188981Sthompsa os::breakpoint(); 305184610Salfred} 306188981Sthompsa 307184610Salfred/* 308184610Salfred * RtlCaptureStackBackTrace Windows API may not exist prior to Windows XP. 309184610Salfred * So far, this method is only used by Native Memory Tracking, which is 310188981Sthompsa * only supported on Windows XP or later. 311188981Sthompsa */ 312188981Sthompsaaddress os::get_caller_pc(int n) { 313184610Salfred#ifdef _NMT_NOINLINE_ 314188981Sthompsa n ++; 315184610Salfred#endif 316184610Salfred address pc; 317184610Salfred if (os::Kernel32Dll::RtlCaptureStackBackTrace(n + 1, 1, (PVOID*)&pc, NULL) == 1) { 318184610Salfred return pc; 319184610Salfred } 320187259Sthompsa return NULL; 321184610Salfred} 322184610Salfred 323184610Salfred 324184610Salfred// os::current_stack_base() 325184610Salfred// 326184610Salfred// Returns the base of the stack, which is the stack's 327184610Salfred// starting address. This function must be called 328184610Salfred// while running on the stack of the thread being queried. 329184610Salfred 330184610Salfredaddress os::current_stack_base() { 331184610Salfred MEMORY_BASIC_INFORMATION minfo; 332184610Salfred address stack_bottom; 333184610Salfred size_t stack_size; 334184610Salfred 335184610Salfred VirtualQuery(&minfo, &minfo, sizeof(minfo)); 336188981Sthompsa stack_bottom = (address)minfo.AllocationBase; 337184610Salfred stack_size = minfo.RegionSize; 338184610Salfred 339184610Salfred // Add up the sizes of all the regions with the same 340184610Salfred // AllocationBase. 341188981Sthompsa while( 1 ) 342184610Salfred { 343188981Sthompsa VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); 344184610Salfred if ( stack_bottom == (address)minfo.AllocationBase ) 345184610Salfred stack_size += minfo.RegionSize; 346184610Salfred else 347188981Sthompsa break; 348184610Salfred } 349188981Sthompsa 350188981Sthompsa#ifdef _M_IA64 351184610Salfred // IA64 has memory and register stacks 352184610Salfred stack_size = stack_size / 2; 353188981Sthompsa#endif 354184610Salfred return stack_bottom + stack_size; 355188981Sthompsa} 356184610Salfred 357188981Sthompsasize_t os::current_stack_size() { 358184610Salfred size_t sz; 359188981Sthompsa MEMORY_BASIC_INFORMATION minfo; 360188981Sthompsa VirtualQuery(&minfo, &minfo, sizeof(minfo)); 361184610Salfred sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; 362188981Sthompsa return sz; 363184610Salfred} 364184610Salfred 365184610Salfredstruct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 366184610Salfred const struct tm* time_struct_ptr = localtime(clock); 367184610Salfred if (time_struct_ptr != NULL) { 368184610Salfred *res = *time_struct_ptr; 369184610Salfred return res; 370184610Salfred } 371184610Salfred return NULL; 372184610Salfred} 373184610Salfred 374184610SalfredLONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); 375184610Salfred 376188981Sthompsa// Thread start routine for all new Java threads 377188981Sthompsastatic unsigned __stdcall java_start(Thread* thread) { 378188981Sthompsa // Try to randomize the cache line index of hot stack frames. 379184610Salfred // This helps when threads of the same stack traces evict each other's 380184610Salfred // cache lines. The threads can be either from the same JVM instance, or 381184610Salfred // from different JVM instances. The benefit is especially true for 382184610Salfred // processors with hyperthreading technology. 383184610Salfred static int counter = 0; 384184610Salfred int pid = os::current_process_id(); 385184610Salfred _alloca(((pid ^ counter++) & 7) * 128); 386184610Salfred 387184610Salfred OSThread* osthr = thread->osthread(); 388184610Salfred assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 389186454Sthompsa 390184610Salfred if (UseNUMA) { 391184610Salfred int lgrp_id = os::numa_get_group_id(); 392184610Salfred if (lgrp_id != -1) { 393184610Salfred thread->set_lgrp_id(lgrp_id); 394184610Salfred } 395184610Salfred } 396184610Salfred 397184610Salfred 398184610Salfred // Install a win32 structured exception handler around every thread created 399184610Salfred // by VM, so VM can genrate error dump when an exception occurred in non- 400184610Salfred // Java thread (e.g. VM thread). 401184610Salfred __try { 402184610Salfred thread->run(); 403184610Salfred } __except(topLevelExceptionFilter( 404184610Salfred (_EXCEPTION_POINTERS*)_exception_info())) { 405184610Salfred // Nothing to do. 406184610Salfred } 407184610Salfred 408184610Salfred // One less thread is executing 409184610Salfred // When the VMThread gets here, the main thread may have already exited 410184610Salfred // which frees the CodeHeap containing the Atomic::add code 411184610Salfred if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 412184610Salfred Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); 413184610Salfred } 414184610Salfred 415184610Salfred return 0; 416188981Sthompsa} 417184610Salfred 418184610Salfredstatic OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { 419184610Salfred // Allocate the OSThread object 420184610Salfred OSThread* osthread = new OSThread(NULL, NULL); 421184610Salfred if (osthread == NULL) return NULL; 422184610Salfred 423188981Sthompsa // Initialize support for Java interrupts 424184610Salfred HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 425184610Salfred if (interrupt_event == NULL) { 426184610Salfred delete osthread; 427184610Salfred return NULL; 428184610Salfred } 429184610Salfred osthread->set_interrupt_event(interrupt_event); 430184610Salfred 431188981Sthompsa // Store info on the Win32 thread into the OSThread 432184610Salfred osthread->set_thread_handle(thread_handle); 433188981Sthompsa osthread->set_thread_id(thread_id); 434184610Salfred 435184610Salfred if (UseNUMA) { 436184610Salfred int lgrp_id = os::numa_get_group_id(); 437184610Salfred if (lgrp_id != -1) { 438184610Salfred thread->set_lgrp_id(lgrp_id); 439184610Salfred } 440184610Salfred } 441184610Salfred 442188981Sthompsa // Initial thread state is INITIALIZED, not SUSPENDED 443184610Salfred osthread->set_state(INITIALIZED); 444184610Salfred 445184610Salfred return osthread; 446184610Salfred} 447184610Salfred 448184610Salfred 449188981Sthompsabool os::create_attached_thread(JavaThread* thread) { 450184610Salfred#ifdef ASSERT 451184610Salfred thread->verify_not_published(); 452184610Salfred#endif 453184610Salfred HANDLE thread_h; 454184610Salfred if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), 455184610Salfred &thread_h, THREAD_ALL_ACCESS, false, 0)) { 456184610Salfred fatal("DuplicateHandle failed\n"); 457184610Salfred } 458184610Salfred OSThread* osthread = create_os_thread(thread, thread_h, 459184610Salfred (int)current_thread_id()); 460184610Salfred if (osthread == NULL) { 461184610Salfred return false; 462184610Salfred } 463188981Sthompsa 464184610Salfred // Initial thread state is RUNNABLE 465184610Salfred osthread->set_state(RUNNABLE); 466184610Salfred 467184610Salfred thread->set_osthread(osthread); 468184610Salfred return true; 469184610Salfred} 470184610Salfred 471184610Salfredbool os::create_main_thread(JavaThread* thread) { 472184610Salfred#ifdef ASSERT 473184610Salfred thread->verify_not_published(); 474184610Salfred#endif 475188981Sthompsa if (_starting_thread == NULL) { 476184610Salfred _starting_thread = create_os_thread(thread, main_thread, main_thread_id); 477184610Salfred if (_starting_thread == NULL) { 478184610Salfred return false; 479184610Salfred } 480184610Salfred } 481184610Salfred 482188981Sthompsa // The primordial thread is runnable from the start) 483184610Salfred _starting_thread->set_state(RUNNABLE); 484184610Salfred 485184610Salfred thread->set_osthread(_starting_thread); 486184610Salfred return true; 487184610Salfred} 488184610Salfred 489184610Salfred// Allocate and initialize a new OSThread 490184610Salfredbool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 491184610Salfred unsigned thread_id; 492184610Salfred 493184610Salfred // Allocate the OSThread object 494184610Salfred OSThread* osthread = new OSThread(NULL, NULL); 495184610Salfred if (osthread == NULL) { 496184610Salfred return false; 497184610Salfred } 498184610Salfred 499184610Salfred // Initialize support for Java interrupts 500184610Salfred HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); 501184610Salfred if (interrupt_event == NULL) { 502184610Salfred delete osthread; 503184610Salfred return NULL; 504184610Salfred } 505184610Salfred osthread->set_interrupt_event(interrupt_event); 506188981Sthompsa osthread->set_interrupted(false); 507184610Salfred 508188981Sthompsa thread->set_osthread(osthread); 509188981Sthompsa 510184610Salfred if (stack_size == 0) { 511188981Sthompsa switch (thr_type) { 512188981Sthompsa case os::java_thread: 513188981Sthompsa // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 514188981Sthompsa if (JavaThread::stack_size_at_create() > 0) 515188981Sthompsa stack_size = JavaThread::stack_size_at_create(); 516188981Sthompsa break; 517188981Sthompsa case os::compiler_thread: 518188981Sthompsa if (CompilerThreadStackSize > 0) { 519188981Sthompsa stack_size = (size_t)(CompilerThreadStackSize * K); 520188981Sthompsa break; 521184610Salfred } // else fall through: 522188981Sthompsa // use VMThreadStackSize if CompilerThreadStackSize is not defined 523184610Salfred case os::vm_thread: 524184610Salfred case os::pgc_thread: 525184610Salfred case os::cgc_thread: 526184610Salfred case os::watcher_thread: 527187259Sthompsa if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 528184610Salfred break; 529184610Salfred } 530187259Sthompsa } 531184610Salfred 532184610Salfred // Create the Win32 thread 533184610Salfred // 534184610Salfred // Contrary to what MSDN document says, "stack_size" in _beginthreadex() 535184610Salfred // does not specify stack size. Instead, it specifies the size of 536184610Salfred // initially committed space. The stack size is determined by 537184610Salfred // PE header in the executable. If the committed "stack_size" is larger 538184610Salfred // than default value in the PE header, the stack is rounded up to the 539184610Salfred // nearest multiple of 1MB. For example if the launcher has default 540184610Salfred // stack size of 320k, specifying any size less than 320k does not 541184610Salfred // affect the actual stack size at all, it only affects the initial 542184610Salfred // commitment. On the other hand, specifying 'stack_size' larger than 543184610Salfred // default value may cause significant increase in memory usage, because 544184610Salfred // not only the stack space will be rounded up to MB, but also the 545184610Salfred // entire space is committed upfront. 546184610Salfred // 547184610Salfred // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' 548184610Salfred // for CreateThread() that can treat 'stack_size' as stack size. However we 549184610Salfred // are not supposed to call CreateThread() directly according to MSDN 550184610Salfred // document because JVM uses C runtime library. The good news is that the 551184610Salfred // flag appears to work with _beginthredex() as well. 552184610Salfred 553184610Salfred#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION 554184610Salfred#define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) 555184610Salfred#endif 556184610Salfred 557184610Salfred HANDLE thread_handle = 558184610Salfred (HANDLE)_beginthreadex(NULL, 559184610Salfred (unsigned)stack_size, 560184610Salfred (unsigned (__stdcall *)(void*)) java_start, 561184610Salfred thread, 562184610Salfred CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, 563184610Salfred &thread_id); 564184610Salfred if (thread_handle == NULL) { 565184610Salfred // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again 566184610Salfred // without the flag. 567184610Salfred thread_handle = 568184610Salfred (HANDLE)_beginthreadex(NULL, 569184610Salfred (unsigned)stack_size, 570184610Salfred (unsigned (__stdcall *)(void*)) java_start, 571184610Salfred thread, 572184610Salfred CREATE_SUSPENDED, 573184610Salfred &thread_id); 574184610Salfred } 575184610Salfred if (thread_handle == NULL) { 576184610Salfred // Need to clean up stuff we've allocated so far 577184610Salfred CloseHandle(osthread->interrupt_event()); 578184610Salfred thread->set_osthread(NULL); 579184610Salfred delete osthread; 580184610Salfred return NULL; 581184610Salfred } 582184610Salfred 583184610Salfred Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); 584184610Salfred 585184610Salfred // Store info on the Win32 thread into the OSThread 586184610Salfred osthread->set_thread_handle(thread_handle); 587184610Salfred osthread->set_thread_id(thread_id); 588189110Sthompsa 589189110Sthompsa // Initial thread state is INITIALIZED, not SUSPENDED 590184610Salfred osthread->set_state(INITIALIZED); 591184610Salfred 592184610Salfred // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 593184610Salfred return true; 594184610Salfred} 595184610Salfred 596184610Salfred 597184610Salfred// Free Win32 resources related to the OSThread 598184610Salfredvoid os::free_thread(OSThread* osthread) { 599184610Salfred assert(osthread != NULL, "osthread not set"); 600184610Salfred CloseHandle(osthread->thread_handle()); 601184610Salfred CloseHandle(osthread->interrupt_event()); 602184610Salfred delete osthread; 603184610Salfred} 604184610Salfred 605184610Salfred 606184610Salfredstatic int has_performance_count = 0; 607184610Salfredstatic jlong first_filetime; 608184610Salfredstatic jlong initial_performance_count; 609184610Salfredstatic jlong performance_frequency; 610184610Salfred 611184610Salfred 612184610Salfredjlong as_long(LARGE_INTEGER x) { 613184610Salfred jlong result = 0; // initialization to avoid warning 614184610Salfred set_high(&result, x.HighPart); 615184610Salfred set_low(&result, x.LowPart); 616184610Salfred return result; 617184610Salfred} 618184610Salfred 619184610Salfred 620184610Salfredjlong os::elapsed_counter() { 621184610Salfred LARGE_INTEGER count; 622184610Salfred if (has_performance_count) { 623184610Salfred QueryPerformanceCounter(&count); 624184610Salfred return as_long(count) - initial_performance_count; 625184610Salfred } else { 626187259Sthompsa FILETIME wt; 627184610Salfred GetSystemTimeAsFileTime(&wt); 628184610Salfred return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); 629184610Salfred } 630184610Salfred} 631184610Salfred 632184610Salfred 633184610Salfredjlong os::elapsed_frequency() { 634187259Sthompsa if (has_performance_count) { 635184610Salfred return performance_frequency; 636184610Salfred } else { 637184610Salfred // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. 638184610Salfred return 10000000; 639184610Salfred } 640184610Salfred} 641184610Salfred 642184610Salfred 643184610Salfredjulong os::available_memory() { 644184610Salfred return win32::available_memory(); 645184610Salfred} 646184610Salfred 647184610Salfredjulong os::win32::available_memory() { 648184610Salfred // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 649184610Salfred // value if total memory is larger than 4GB 650184610Salfred MEMORYSTATUSEX ms; 651184610Salfred ms.dwLength = sizeof(ms); 652184610Salfred GlobalMemoryStatusEx(&ms); 653184610Salfred 654184610Salfred return (julong)ms.ullAvailPhys; 655184610Salfred} 656184610Salfred 657184610Salfredjulong os::physical_memory() { 658184610Salfred return win32::physical_memory(); 659184610Salfred} 660184610Salfred 661184610Salfredjulong os::allocatable_physical_memory(julong size) { 662184610Salfred#ifdef _LP64 663184610Salfred return size; 664184610Salfred#else 665184610Salfred // Limit to 1400m because of the 2gb address space wall 666184610Salfred return MIN2(size, (julong)1400*M); 667184610Salfred#endif 668184610Salfred} 669184610Salfred 670184610Salfred// VC6 lacks DWORD_PTR 671184610Salfred#if _MSC_VER < 1300 672184610Salfredtypedef UINT_PTR DWORD_PTR; 673184610Salfred#endif 674184610Salfred 675184610Salfredint os::active_processor_count() { 676184610Salfred DWORD_PTR lpProcessAffinityMask = 0; 677184610Salfred DWORD_PTR lpSystemAffinityMask = 0; 678184610Salfred int proc_count = processor_count(); 679184610Salfred if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && 680184610Salfred GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { 681184610Salfred // Nof active processors is number of bits in process affinity mask 682184610Salfred int bitcount = 0; 683184610Salfred while (lpProcessAffinityMask != 0) { 684184610Salfred lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); 685184610Salfred bitcount++; 686184610Salfred } 687184610Salfred return bitcount; 688184610Salfred } else { 689184610Salfred return proc_count; 690184610Salfred } 691184610Salfred} 692184610Salfred 693184610Salfredvoid os::set_native_thread_name(const char *name) { 694184610Salfred // Not yet implemented. 695184610Salfred return; 696184610Salfred} 697189110Sthompsa 698184610Salfredbool os::distribute_processes(uint length, uint* distribution) { 699184610Salfred // Not yet implemented. 700184610Salfred return false; 701184610Salfred} 702184610Salfred 703184610Salfredbool os::bind_to_processor(uint processor_id) { 704184610Salfred // Not yet implemented. 705184610Salfred return false; 706184610Salfred} 707184610Salfred 708184610Salfredstatic void initialize_performance_counter() { 709184610Salfred LARGE_INTEGER count; 710184610Salfred if (QueryPerformanceFrequency(&count)) { 711184610Salfred has_performance_count = 1; 712184610Salfred performance_frequency = as_long(count); 713184610Salfred QueryPerformanceCounter(&count); 714184610Salfred initial_performance_count = as_long(count); 715184610Salfred } else { 716184610Salfred has_performance_count = 0; 717184610Salfred FILETIME wt; 718184610Salfred GetSystemTimeAsFileTime(&wt); 719184610Salfred first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 720184610Salfred } 721184610Salfred} 722184610Salfred 723184610Salfred 724189110Sthompsadouble os::elapsedTime() { 725184610Salfred return (double) elapsed_counter() / (double) elapsed_frequency(); 726184610Salfred} 727184610Salfred 728184610Salfred 729184610Salfred// Windows format: 730184610Salfred// The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. 731184610Salfred// Java format: 732189110Sthompsa// Java standards require the number of milliseconds since 1/1/1970 733184610Salfred 734184610Salfred// Constant offset - calculated using offset() 735184610Salfredstatic jlong _offset = 116444736000000000; 736184610Salfred// Fake time counter for reproducible results when debugging 737184610Salfredstatic jlong fake_time = 0; 738184610Salfred 739184610Salfred#ifdef ASSERT 740184610Salfred// Just to be safe, recalculate the offset in debug mode 741184610Salfredstatic jlong _calculated_offset = 0; 742184610Salfredstatic int _has_calculated_offset = 0; 743184610Salfred 744184610Salfredjlong offset() { 745184610Salfred if (_has_calculated_offset) return _calculated_offset; 746184610Salfred SYSTEMTIME java_origin; 747184610Salfred java_origin.wYear = 1970; 748184610Salfred java_origin.wMonth = 1; 749184610Salfred java_origin.wDayOfWeek = 0; // ignored 750184610Salfred java_origin.wDay = 1; 751184610Salfred java_origin.wHour = 0; 752184610Salfred java_origin.wMinute = 0; 753184610Salfred java_origin.wSecond = 0; 754184610Salfred java_origin.wMilliseconds = 0; 755184610Salfred FILETIME jot; 756184610Salfred if (!SystemTimeToFileTime(&java_origin, &jot)) { 757184610Salfred fatal(err_msg("Error = %d\nWindows error", GetLastError())); 758184610Salfred } 759184610Salfred _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); 760184610Salfred _has_calculated_offset = 1; 761184610Salfred assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); 762184610Salfred return _calculated_offset; 763184610Salfred} 764184610Salfred#else 765184610Salfredjlong offset() { 766184610Salfred return _offset; 767184610Salfred} 768184610Salfred#endif 769184610Salfred 770184610Salfredjlong windows_to_java_time(FILETIME wt) { 771184610Salfred jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); 772184610Salfred return (a - offset()) / 10000; 773184610Salfred} 774184610Salfred 775184610SalfredFILETIME java_to_windows_time(jlong l) { 776184610Salfred jlong a = (l * 10000) + offset(); 777184610Salfred FILETIME result; 778184610Salfred result.dwHighDateTime = high(a); 779184610Salfred result.dwLowDateTime = low(a); 780184610Salfred return result; 781184610Salfred} 782184610Salfred 783184610Salfred// For now, we say that Windows does not support vtime. I have no idea 784184610Salfred// whether it can actually be made to (DLD, 9/13/05). 785184610Salfred 786184610Salfredbool os::supports_vtime() { return false; } 787184610Salfredbool os::enable_vtime() { return false; } 788184610Salfredbool os::vtime_enabled() { return false; } 789184610Salfreddouble os::elapsedVTime() { 790184610Salfred // better than nothing, but not much 791184610Salfred return elapsedTime(); 792184610Salfred} 793184610Salfred 794184610Salfredjlong os::javaTimeMillis() { 795184610Salfred if (UseFakeTimers) { 796184610Salfred return fake_time++; 797184610Salfred } else { 798184610Salfred FILETIME wt; 799184610Salfred GetSystemTimeAsFileTime(&wt); 800184610Salfred return windows_to_java_time(wt); 801184610Salfred } 802184610Salfred} 803184610Salfred 804184610Salfredjlong os::javaTimeNanos() { 805184610Salfred if (!has_performance_count) { 806184610Salfred return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do. 807184610Salfred } else { 808184610Salfred LARGE_INTEGER current_count; 809184610Salfred QueryPerformanceCounter(¤t_count); 810184610Salfred double current = as_long(current_count); 811184610Salfred double freq = performance_frequency; 812184610Salfred jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC); 813184610Salfred return time; 814184610Salfred } 815184610Salfred} 816184610Salfred 817184610Salfredvoid os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 818184610Salfred if (!has_performance_count) { 819184610Salfred // javaTimeMillis() doesn't have much percision, 820184610Salfred // but it is not going to wrap -- so all 64 bits 821184610Salfred info_ptr->max_value = ALL_64_BITS; 822184610Salfred 823184610Salfred // this is a wall clock timer, so may skip 824184610Salfred info_ptr->may_skip_backward = true; 825184610Salfred info_ptr->may_skip_forward = true; 826184610Salfred } else { 827184610Salfred jlong freq = performance_frequency; 828184610Salfred if (freq < NANOSECS_PER_SEC) { 829184610Salfred // the performance counter is 64 bits and we will 830184610Salfred // be multiplying it -- so no wrap in 64 bits 831184610Salfred info_ptr->max_value = ALL_64_BITS; 832184610Salfred } else if (freq > NANOSECS_PER_SEC) { 833184610Salfred // use the max value the counter can reach to 834184610Salfred // determine the max value which could be returned 835184610Salfred julong max_counter = (julong)ALL_64_BITS; 836184610Salfred info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC)); 837184610Salfred } else { 838184610Salfred // the performance counter is 64 bits and we will 839184610Salfred // be using it directly -- so no wrap in 64 bits 840184610Salfred info_ptr->max_value = ALL_64_BITS; 841184610Salfred } 842184610Salfred 843184610Salfred // using a counter, so no skipping 844184610Salfred info_ptr->may_skip_backward = false; 845184610Salfred info_ptr->may_skip_forward = false; 846184610Salfred } 847184610Salfred info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 848184610Salfred} 849184610Salfred 850184610Salfredchar* os::local_time_string(char *buf, size_t buflen) { 851184610Salfred SYSTEMTIME st; 852184610Salfred GetLocalTime(&st); 853184610Salfred jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 854184610Salfred st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); 855184610Salfred return buf; 856184610Salfred} 857184610Salfred 858184610Salfredbool os::getTimesSecs(double* process_real_time, 859184610Salfred double* process_user_time, 860184610Salfred double* process_system_time) { 861184610Salfred HANDLE h_process = GetCurrentProcess(); 862188942Sthompsa FILETIME create_time, exit_time, kernel_time, user_time; 863 BOOL result = GetProcessTimes(h_process, 864 &create_time, 865 &exit_time, 866 &kernel_time, 867 &user_time); 868 if (result != 0) { 869 FILETIME wt; 870 GetSystemTimeAsFileTime(&wt); 871 jlong rtc_millis = windows_to_java_time(wt); 872 jlong user_millis = windows_to_java_time(user_time); 873 jlong system_millis = windows_to_java_time(kernel_time); 874 *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); 875 *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); 876 *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); 877 return true; 878 } else { 879 return false; 880 } 881} 882 883void os::shutdown() { 884 885 // allow PerfMemory to attempt cleanup of any persistent resources 886 perfMemory_exit(); 887 888 // flush buffered output, finish log files 889 ostream_abort(); 890 891 // Check for abort hook 892 abort_hook_t abort_hook = Arguments::abort_hook(); 893 if (abort_hook != NULL) { 894 abort_hook(); 895 } 896} 897 898 899static BOOL (WINAPI *_MiniDumpWriteDump) ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 900 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION); 901 902void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) { 903 HINSTANCE dbghelp; 904 EXCEPTION_POINTERS ep; 905 MINIDUMP_EXCEPTION_INFORMATION mei; 906 MINIDUMP_EXCEPTION_INFORMATION* pmei; 907 908 HANDLE hProcess = GetCurrentProcess(); 909 DWORD processId = GetCurrentProcessId(); 910 HANDLE dumpFile; 911 MINIDUMP_TYPE dumpType; 912 static const char* cwd; 913 914 // If running on a client version of Windows and user has not explicitly enabled dumping 915 if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) { 916 VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false); 917 return; 918 // If running on a server version of Windows and user has explictly disabled dumping 919 } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) { 920 VMError::report_coredump_status("Minidump has been disabled from the command line", false); 921 return; 922 } 923 924 dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0); 925 926 if (dbghelp == NULL) { 927 VMError::report_coredump_status("Failed to load dbghelp.dll", false); 928 return; 929 } 930 931 _MiniDumpWriteDump = CAST_TO_FN_PTR( 932 BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION, 933 PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION), 934 GetProcAddress(dbghelp, "MiniDumpWriteDump")); 935 936 if (_MiniDumpWriteDump == NULL) { 937 VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false); 938 return; 939 } 940 941 dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData); 942 943// Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with 944// API_VERSION_NUMBER 11 or higher contains the ones we want though 945#if API_VERSION_NUMBER >= 11 946 dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo | 947 MiniDumpWithUnloadedModules); 948#endif 949 950 cwd = get_current_directory(NULL, 0); 951 jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id()); 952 dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 953 954 if (dumpFile == INVALID_HANDLE_VALUE) { 955 VMError::report_coredump_status("Failed to create file for dumping", false); 956 return; 957 } 958 if (exceptionRecord != NULL && contextRecord != NULL) { 959 ep.ContextRecord = (PCONTEXT) contextRecord; 960 ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord; 961 962 mei.ThreadId = GetCurrentThreadId(); 963 mei.ExceptionPointers = &ep; 964 pmei = &mei; 965 } else { 966 pmei = NULL; 967 } 968 969 970 // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all 971 // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then. 972 if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false && 973 _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) { 974 VMError::report_coredump_status("Call to MiniDumpWriteDump() failed", false); 975 } else { 976 VMError::report_coredump_status(buffer, true); 977 } 978 979 CloseHandle(dumpFile); 980} 981 982 983 984void os::abort(bool dump_core) 985{ 986 os::shutdown(); 987 // no core dump on Windows 988 ::exit(1); 989} 990 991// Die immediately, no exit hook, no abort hook, no cleanup. 992void os::die() { 993 _exit(-1); 994} 995 996// Directory routines copied from src/win32/native/java/io/dirent_md.c 997// * dirent_md.c 1.15 00/02/02 998// 999// The declarations for DIR and struct dirent are in jvm_win32.h. 1000 1001/* Caller must have already run dirname through JVM_NativePath, which removes 1002 duplicate slashes and converts all instances of '/' into '\\'. */ 1003 1004DIR * 1005os::opendir(const char *dirname) 1006{ 1007 assert(dirname != NULL, "just checking"); // hotspot change 1008 DIR *dirp = (DIR *)malloc(sizeof(DIR), mtInternal); 1009 DWORD fattr; // hotspot change 1010 char alt_dirname[4] = { 0, 0, 0, 0 }; 1011 1012 if (dirp == 0) { 1013 errno = ENOMEM; 1014 return 0; 1015 } 1016 1017 /* 1018 * Win32 accepts "\" in its POSIX stat(), but refuses to treat it 1019 * as a directory in FindFirstFile(). We detect this case here and 1020 * prepend the current drive name. 1021 */ 1022 if (dirname[1] == '\0' && dirname[0] == '\\') { 1023 alt_dirname[0] = _getdrive() + 'A' - 1; 1024 alt_dirname[1] = ':'; 1025 alt_dirname[2] = '\\'; 1026 alt_dirname[3] = '\0'; 1027 dirname = alt_dirname; 1028 } 1029 1030 dirp->path = (char *)malloc(strlen(dirname) + 5, mtInternal); 1031 if (dirp->path == 0) { 1032 free(dirp, mtInternal); 1033 errno = ENOMEM; 1034 return 0; 1035 } 1036 strcpy(dirp->path, dirname); 1037 1038 fattr = GetFileAttributes(dirp->path); 1039 if (fattr == 0xffffffff) { 1040 free(dirp->path, mtInternal); 1041 free(dirp, mtInternal); 1042 errno = ENOENT; 1043 return 0; 1044 } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { 1045 free(dirp->path, mtInternal); 1046 free(dirp, mtInternal); 1047 errno = ENOTDIR; 1048 return 0; 1049 } 1050 1051 /* Append "*.*", or possibly "\\*.*", to path */ 1052 if (dirp->path[1] == ':' 1053 && (dirp->path[2] == '\0' 1054 || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { 1055 /* No '\\' needed for cases like "Z:" or "Z:\" */ 1056 strcat(dirp->path, "*.*"); 1057 } else { 1058 strcat(dirp->path, "\\*.*"); 1059 } 1060 1061 dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); 1062 if (dirp->handle == INVALID_HANDLE_VALUE) { 1063 if (GetLastError() != ERROR_FILE_NOT_FOUND) { 1064 free(dirp->path, mtInternal); 1065 free(dirp, mtInternal); 1066 errno = EACCES; 1067 return 0; 1068 } 1069 } 1070 return dirp; 1071} 1072 1073/* parameter dbuf unused on Windows */ 1074 1075struct dirent * 1076os::readdir(DIR *dirp, dirent *dbuf) 1077{ 1078 assert(dirp != NULL, "just checking"); // hotspot change 1079 if (dirp->handle == INVALID_HANDLE_VALUE) { 1080 return 0; 1081 } 1082 1083 strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); 1084 1085 if (!FindNextFile(dirp->handle, &dirp->find_data)) { 1086 if (GetLastError() == ERROR_INVALID_HANDLE) { 1087 errno = EBADF; 1088 return 0; 1089 } 1090 FindClose(dirp->handle); 1091 dirp->handle = INVALID_HANDLE_VALUE; 1092 } 1093 1094 return &dirp->dirent; 1095} 1096 1097int 1098os::closedir(DIR *dirp) 1099{ 1100 assert(dirp != NULL, "just checking"); // hotspot change 1101 if (dirp->handle != INVALID_HANDLE_VALUE) { 1102 if (!FindClose(dirp->handle)) { 1103 errno = EBADF; 1104 return -1; 1105 } 1106 dirp->handle = INVALID_HANDLE_VALUE; 1107 } 1108 free(dirp->path, mtInternal); 1109 free(dirp, mtInternal); 1110 return 0; 1111} 1112 1113// This must be hard coded because it's the system's temporary 1114// directory not the java application's temp directory, ala java.io.tmpdir. 1115const char* os::get_temp_directory() { 1116 static char path_buf[MAX_PATH]; 1117 if (GetTempPath(MAX_PATH, path_buf)>0) 1118 return path_buf; 1119 else{ 1120 path_buf[0]='\0'; 1121 return path_buf; 1122 } 1123} 1124 1125static bool file_exists(const char* filename) { 1126 if (filename == NULL || strlen(filename) == 0) { 1127 return false; 1128 } 1129 return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; 1130} 1131 1132bool os::dll_build_name(char *buffer, size_t buflen, 1133 const char* pname, const char* fname) { 1134 bool retval = false; 1135 const size_t pnamelen = pname ? strlen(pname) : 0; 1136 const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; 1137 1138 // Return error on buffer overflow. 1139 if (pnamelen + strlen(fname) + 10 > buflen) { 1140 return retval; 1141 } 1142 1143 if (pnamelen == 0) { 1144 jio_snprintf(buffer, buflen, "%s.dll", fname); 1145 retval = true; 1146 } else if (c == ':' || c == '\\') { 1147 jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); 1148 retval = true; 1149 } else if (strchr(pname, *os::path_separator()) != NULL) { 1150 int n; 1151 char** pelements = split_path(pname, &n); 1152 for (int i = 0 ; i < n ; i++) { 1153 char* path = pelements[i]; 1154 // Really shouldn't be NULL, but check can't hurt 1155 size_t plen = (path == NULL) ? 0 : strlen(path); 1156 if (plen == 0) { 1157 continue; // skip the empty path values 1158 } 1159 const char lastchar = path[plen - 1]; 1160 if (lastchar == ':' || lastchar == '\\') { 1161 jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); 1162 } else { 1163 jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); 1164 } 1165 if (file_exists(buffer)) { 1166 retval = true; 1167 break; 1168 } 1169 } 1170 // release the storage 1171 for (int i = 0 ; i < n ; i++) { 1172 if (pelements[i] != NULL) { 1173 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1174 } 1175 } 1176 if (pelements != NULL) { 1177 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1178 } 1179 } else { 1180 jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); 1181 retval = true; 1182 } 1183 return retval; 1184} 1185 1186// Needs to be in os specific directory because windows requires another 1187// header file <direct.h> 1188const char* os::get_current_directory(char *buf, int buflen) { 1189 return _getcwd(buf, buflen); 1190} 1191 1192//----------------------------------------------------------- 1193// Helper functions for fatal error handler 1194#ifdef _WIN64 1195// Helper routine which returns true if address in 1196// within the NTDLL address space. 1197// 1198static bool _addr_in_ntdll( address addr ) 1199{ 1200 HMODULE hmod; 1201 MODULEINFO minfo; 1202 1203 hmod = GetModuleHandle("NTDLL.DLL"); 1204 if ( hmod == NULL ) return false; 1205 if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod, 1206 &minfo, sizeof(MODULEINFO)) ) 1207 return false; 1208 1209 if ( (addr >= minfo.lpBaseOfDll) && 1210 (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) 1211 return true; 1212 else 1213 return false; 1214} 1215#endif 1216 1217 1218// Enumerate all modules for a given process ID 1219// 1220// Notice that Windows 95/98/Me and Windows NT/2000/XP have 1221// different API for doing this. We use PSAPI.DLL on NT based 1222// Windows and ToolHelp on 95/98/Me. 1223 1224// Callback function that is called by enumerate_modules() on 1225// every DLL module. 1226// Input parameters: 1227// int pid, 1228// char* module_file_name, 1229// address module_base_addr, 1230// unsigned module_size, 1231// void* param 1232typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); 1233 1234// enumerate_modules for Windows NT, using PSAPI 1235static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) 1236{ 1237 HANDLE hProcess ; 1238 1239# define MAX_NUM_MODULES 128 1240 HMODULE modules[MAX_NUM_MODULES]; 1241 static char filename[ MAX_PATH ]; 1242 int result = 0; 1243 1244 if (!os::PSApiDll::PSApiAvailable()) { 1245 return 0; 1246 } 1247 1248 hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 1249 FALSE, pid ) ; 1250 if (hProcess == NULL) return 0; 1251 1252 DWORD size_needed; 1253 if (!os::PSApiDll::EnumProcessModules(hProcess, modules, 1254 sizeof(modules), &size_needed)) { 1255 CloseHandle( hProcess ); 1256 return 0; 1257 } 1258 1259 // number of modules that are currently loaded 1260 int num_modules = size_needed / sizeof(HMODULE); 1261 1262 for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { 1263 // Get Full pathname: 1264 if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i], 1265 filename, sizeof(filename))) { 1266 filename[0] = '\0'; 1267 } 1268 1269 MODULEINFO modinfo; 1270 if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i], 1271 &modinfo, sizeof(modinfo))) { 1272 modinfo.lpBaseOfDll = NULL; 1273 modinfo.SizeOfImage = 0; 1274 } 1275 1276 // Invoke callback function 1277 result = func(pid, filename, (address)modinfo.lpBaseOfDll, 1278 modinfo.SizeOfImage, param); 1279 if (result) break; 1280 } 1281 1282 CloseHandle( hProcess ) ; 1283 return result; 1284} 1285 1286 1287// enumerate_modules for Windows 95/98/ME, using TOOLHELP 1288static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) 1289{ 1290 HANDLE hSnapShot ; 1291 static MODULEENTRY32 modentry ; 1292 int result = 0; 1293 1294 if (!os::Kernel32Dll::HelpToolsAvailable()) { 1295 return 0; 1296 } 1297 1298 // Get a handle to a Toolhelp snapshot of the system 1299 hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; 1300 if( hSnapShot == INVALID_HANDLE_VALUE ) { 1301 return FALSE ; 1302 } 1303 1304 // iterate through all modules 1305 modentry.dwSize = sizeof(MODULEENTRY32) ; 1306 bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0; 1307 1308 while( not_done ) { 1309 // invoke the callback 1310 result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, 1311 modentry.modBaseSize, param); 1312 if (result) break; 1313 1314 modentry.dwSize = sizeof(MODULEENTRY32) ; 1315 not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0; 1316 } 1317 1318 CloseHandle(hSnapShot); 1319 return result; 1320} 1321 1322int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) 1323{ 1324 // Get current process ID if caller doesn't provide it. 1325 if (!pid) pid = os::current_process_id(); 1326 1327 if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); 1328 else return _enumerate_modules_windows(pid, func, param); 1329} 1330 1331struct _modinfo { 1332 address addr; 1333 char* full_path; // point to a char buffer 1334 int buflen; // size of the buffer 1335 address base_addr; 1336}; 1337 1338static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, 1339 unsigned size, void * param) { 1340 struct _modinfo *pmod = (struct _modinfo *)param; 1341 if (!pmod) return -1; 1342 1343 if (base_addr <= pmod->addr && 1344 base_addr+size > pmod->addr) { 1345 // if a buffer is provided, copy path name to the buffer 1346 if (pmod->full_path) { 1347 jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); 1348 } 1349 pmod->base_addr = base_addr; 1350 return 1; 1351 } 1352 return 0; 1353} 1354 1355bool os::dll_address_to_library_name(address addr, char* buf, 1356 int buflen, int* offset) { 1357// NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always 1358// return the full path to the DLL file, sometimes it returns path 1359// to the corresponding PDB file (debug info); sometimes it only 1360// returns partial path, which makes life painful. 1361 1362 struct _modinfo mi; 1363 mi.addr = addr; 1364 mi.full_path = buf; 1365 mi.buflen = buflen; 1366 int pid = os::current_process_id(); 1367 if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { 1368 // buf already contains path name 1369 if (offset) *offset = addr - mi.base_addr; 1370 return true; 1371 } else { 1372 if (buf) buf[0] = '\0'; 1373 if (offset) *offset = -1; 1374 return false; 1375 } 1376} 1377 1378bool os::dll_address_to_function_name(address addr, char *buf, 1379 int buflen, int *offset) { 1380 if (Decoder::decode(addr, buf, buflen, offset)) { 1381 return true; 1382 } 1383 if (offset != NULL) *offset = -1; 1384 if (buf != NULL) buf[0] = '\0'; 1385 return false; 1386} 1387 1388// save the start and end address of jvm.dll into param[0] and param[1] 1389static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, 1390 unsigned size, void * param) { 1391 if (!param) return -1; 1392 1393 if (base_addr <= (address)_locate_jvm_dll && 1394 base_addr+size > (address)_locate_jvm_dll) { 1395 ((address*)param)[0] = base_addr; 1396 ((address*)param)[1] = base_addr + size; 1397 return 1; 1398 } 1399 return 0; 1400} 1401 1402address vm_lib_location[2]; // start and end address of jvm.dll 1403 1404// check if addr is inside jvm.dll 1405bool os::address_is_in_vm(address addr) { 1406 if (!vm_lib_location[0] || !vm_lib_location[1]) { 1407 int pid = os::current_process_id(); 1408 if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { 1409 assert(false, "Can't find jvm module."); 1410 return false; 1411 } 1412 } 1413 1414 return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); 1415} 1416 1417// print module info; param is outputStream* 1418static int _print_module(int pid, char* fname, address base, 1419 unsigned size, void* param) { 1420 if (!param) return -1; 1421 1422 outputStream* st = (outputStream*)param; 1423 1424 address end_addr = base + size; 1425 st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); 1426 return 0; 1427} 1428 1429// Loads .dll/.so and 1430// in case of error it checks if .dll/.so was built for the 1431// same architecture as Hotspot is running on 1432void * os::dll_load(const char *name, char *ebuf, int ebuflen) 1433{ 1434 void * result = LoadLibrary(name); 1435 if (result != NULL) 1436 { 1437 return result; 1438 } 1439 1440 DWORD errcode = GetLastError(); 1441 if (errcode == ERROR_MOD_NOT_FOUND) { 1442 strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); 1443 ebuf[ebuflen-1]='\0'; 1444 return NULL; 1445 } 1446 1447 // Parsing dll below 1448 // If we can read dll-info and find that dll was built 1449 // for an architecture other than Hotspot is running in 1450 // - then print to buffer "DLL was built for a different architecture" 1451 // else call os::lasterror to obtain system error message 1452 1453 // Read system error message into ebuf 1454 // It may or may not be overwritten below (in the for loop and just above) 1455 lasterror(ebuf, (size_t) ebuflen); 1456 ebuf[ebuflen-1]='\0'; 1457 int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); 1458 if (file_descriptor<0) 1459 { 1460 return NULL; 1461 } 1462 1463 uint32_t signature_offset; 1464 uint16_t lib_arch=0; 1465 bool failed_to_get_lib_arch= 1466 ( 1467 //Go to position 3c in the dll 1468 (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) 1469 || 1470 // Read loacation of signature 1471 (sizeof(signature_offset)!= 1472 (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) 1473 || 1474 //Go to COFF File Header in dll 1475 //that is located after"signature" (4 bytes long) 1476 (os::seek_to_file_offset(file_descriptor, 1477 signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) 1478 || 1479 //Read field that contains code of architecture 1480 // that dll was build for 1481 (sizeof(lib_arch)!= 1482 (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) 1483 ); 1484 1485 ::close(file_descriptor); 1486 if (failed_to_get_lib_arch) 1487 { 1488 // file i/o error - report os::lasterror(...) msg 1489 return NULL; 1490 } 1491 1492 typedef struct 1493 { 1494 uint16_t arch_code; 1495 char* arch_name; 1496 } arch_t; 1497 1498 static const arch_t arch_array[]={ 1499 {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, 1500 {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, 1501 {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} 1502 }; 1503 #if (defined _M_IA64) 1504 static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; 1505 #elif (defined _M_AMD64) 1506 static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; 1507 #elif (defined _M_IX86) 1508 static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; 1509 #else 1510 #error Method os::dll_load requires that one of following \ 1511 is defined :_M_IA64,_M_AMD64 or _M_IX86 1512 #endif 1513 1514 1515 // Obtain a string for printf operation 1516 // lib_arch_str shall contain string what platform this .dll was built for 1517 // running_arch_str shall string contain what platform Hotspot was built for 1518 char *running_arch_str=NULL,*lib_arch_str=NULL; 1519 for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) 1520 { 1521 if (lib_arch==arch_array[i].arch_code) 1522 lib_arch_str=arch_array[i].arch_name; 1523 if (running_arch==arch_array[i].arch_code) 1524 running_arch_str=arch_array[i].arch_name; 1525 } 1526 1527 assert(running_arch_str, 1528 "Didn't find runing architecture code in arch_array"); 1529 1530 // If the architure is right 1531 // but some other error took place - report os::lasterror(...) msg 1532 if (lib_arch == running_arch) 1533 { 1534 return NULL; 1535 } 1536 1537 if (lib_arch_str!=NULL) 1538 { 1539 ::_snprintf(ebuf, ebuflen-1, 1540 "Can't load %s-bit .dll on a %s-bit platform", 1541 lib_arch_str,running_arch_str); 1542 } 1543 else 1544 { 1545 // don't know what architecture this dll was build for 1546 ::_snprintf(ebuf, ebuflen-1, 1547 "Can't load this .dll (machine code=0x%x) on a %s-bit platform", 1548 lib_arch,running_arch_str); 1549 } 1550 1551 return NULL; 1552} 1553 1554 1555void os::print_dll_info(outputStream *st) { 1556 int pid = os::current_process_id(); 1557 st->print_cr("Dynamic libraries:"); 1558 enumerate_modules(pid, _print_module, (void *)st); 1559} 1560 1561void os::print_os_info_brief(outputStream* st) { 1562 os::print_os_info(st); 1563} 1564 1565void os::print_os_info(outputStream* st) { 1566 st->print("OS:"); 1567 1568 os::win32::print_windows_version(st); 1569} 1570 1571void os::win32::print_windows_version(outputStream* st) { 1572 OSVERSIONINFOEX osvi; 1573 ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); 1574 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 1575 1576 if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { 1577 st->print_cr("N/A"); 1578 return; 1579 } 1580 1581 int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; 1582 if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { 1583 switch (os_vers) { 1584 case 3051: st->print(" Windows NT 3.51"); break; 1585 case 4000: st->print(" Windows NT 4.0"); break; 1586 case 5000: st->print(" Windows 2000"); break; 1587 case 5001: st->print(" Windows XP"); break; 1588 case 5002: 1589 case 6000: 1590 case 6001: 1591 case 6002: { 1592 // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could 1593 // find out whether we are running on 64 bit processor or not. 1594 SYSTEM_INFO si; 1595 ZeroMemory(&si, sizeof(SYSTEM_INFO)); 1596 if (!os::Kernel32Dll::GetNativeSystemInfoAvailable()){ 1597 GetSystemInfo(&si); 1598 } else { 1599 os::Kernel32Dll::GetNativeSystemInfo(&si); 1600 } 1601 if (os_vers == 5002) { 1602 if (osvi.wProductType == VER_NT_WORKSTATION && 1603 si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1604 st->print(" Windows XP x64 Edition"); 1605 else 1606 st->print(" Windows Server 2003 family"); 1607 } else if (os_vers == 6000) { 1608 if (osvi.wProductType == VER_NT_WORKSTATION) 1609 st->print(" Windows Vista"); 1610 else 1611 st->print(" Windows Server 2008"); 1612 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1613 st->print(" , 64 bit"); 1614 } else if (os_vers == 6001) { 1615 if (osvi.wProductType == VER_NT_WORKSTATION) { 1616 st->print(" Windows 7"); 1617 } else { 1618 // Unrecognized windows, print out its major and minor versions 1619 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1620 } 1621 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1622 st->print(" , 64 bit"); 1623 } else if (os_vers == 6002) { 1624 if (osvi.wProductType == VER_NT_WORKSTATION) { 1625 st->print(" Windows 8"); 1626 } else { 1627 st->print(" Windows Server 2012"); 1628 } 1629 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1630 st->print(" , 64 bit"); 1631 } else { // future os 1632 // Unrecognized windows, print out its major and minor versions 1633 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1634 if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) 1635 st->print(" , 64 bit"); 1636 } 1637 break; 1638 } 1639 default: // future windows, print out its major and minor versions 1640 st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1641 } 1642 } else { 1643 switch (os_vers) { 1644 case 4000: st->print(" Windows 95"); break; 1645 case 4010: st->print(" Windows 98"); break; 1646 case 4090: st->print(" Windows Me"); break; 1647 default: // future windows, print out its major and minor versions 1648 st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); 1649 } 1650 } 1651 st->print(" Build %d", osvi.dwBuildNumber); 1652 st->print(" %s", osvi.szCSDVersion); // service pack 1653 st->cr(); 1654} 1655 1656void os::pd_print_cpu_info(outputStream* st) { 1657 // Nothing to do for now. 1658} 1659 1660void os::print_memory_info(outputStream* st) { 1661 st->print("Memory:"); 1662 st->print(" %dk page", os::vm_page_size()>>10); 1663 1664 // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect 1665 // value if total memory is larger than 4GB 1666 MEMORYSTATUSEX ms; 1667 ms.dwLength = sizeof(ms); 1668 GlobalMemoryStatusEx(&ms); 1669 1670 st->print(", physical %uk", os::physical_memory() >> 10); 1671 st->print("(%uk free)", os::available_memory() >> 10); 1672 1673 st->print(", swap %uk", ms.ullTotalPageFile >> 10); 1674 st->print("(%uk free)", ms.ullAvailPageFile >> 10); 1675 st->cr(); 1676} 1677 1678void os::print_siginfo(outputStream *st, void *siginfo) { 1679 EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; 1680 st->print("siginfo:"); 1681 st->print(" ExceptionCode=0x%x", er->ExceptionCode); 1682 1683 if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 1684 er->NumberParameters >= 2) { 1685 switch (er->ExceptionInformation[0]) { 1686 case 0: st->print(", reading address"); break; 1687 case 1: st->print(", writing address"); break; 1688 default: st->print(", ExceptionInformation=" INTPTR_FORMAT, 1689 er->ExceptionInformation[0]); 1690 } 1691 st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); 1692 } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && 1693 er->NumberParameters >= 2 && UseSharedSpaces) { 1694 FileMapInfo* mapinfo = FileMapInfo::current_info(); 1695 if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { 1696 st->print("\n\nError accessing class data sharing archive." \ 1697 " Mapped file inaccessible during execution, " \ 1698 " possible disk/network problem."); 1699 } 1700 } else { 1701 int num = er->NumberParameters; 1702 if (num > 0) { 1703 st->print(", ExceptionInformation="); 1704 for (int i = 0; i < num; i++) { 1705 st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); 1706 } 1707 } 1708 } 1709 st->cr(); 1710} 1711 1712void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 1713 // do nothing 1714} 1715 1716static char saved_jvm_path[MAX_PATH] = {0}; 1717 1718// Find the full path to the current module, jvm.dll 1719void os::jvm_path(char *buf, jint buflen) { 1720 // Error checking. 1721 if (buflen < MAX_PATH) { 1722 assert(false, "must use a large-enough buffer"); 1723 buf[0] = '\0'; 1724 return; 1725 } 1726 // Lazy resolve the path to current module. 1727 if (saved_jvm_path[0] != 0) { 1728 strcpy(buf, saved_jvm_path); 1729 return; 1730 } 1731 1732 buf[0] = '\0'; 1733 if (Arguments::created_by_gamma_launcher()) { 1734 // Support for the gamma launcher. Check for an 1735 // JAVA_HOME environment variable 1736 // and fix up the path so it looks like 1737 // libjvm.so is installed there (append a fake suffix 1738 // hotspot/libjvm.so). 1739 char* java_home_var = ::getenv("JAVA_HOME"); 1740 if (java_home_var != NULL && java_home_var[0] != 0) { 1741 1742 strncpy(buf, java_home_var, buflen); 1743 1744 // determine if this is a legacy image or modules image 1745 // modules image doesn't have "jre" subdirectory 1746 size_t len = strlen(buf); 1747 char* jrebin_p = buf + len; 1748 jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\"); 1749 if (0 != _access(buf, 0)) { 1750 jio_snprintf(jrebin_p, buflen-len, "\\bin\\"); 1751 } 1752 len = strlen(buf); 1753 jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll"); 1754 } 1755 } 1756 1757 if(buf[0] == '\0') { 1758 GetModuleFileName(vm_lib_handle, buf, buflen); 1759 } 1760 strcpy(saved_jvm_path, buf); 1761} 1762 1763 1764void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 1765#ifndef _WIN64 1766 st->print("_"); 1767#endif 1768} 1769 1770 1771void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 1772#ifndef _WIN64 1773 st->print("@%d", args_size * sizeof(int)); 1774#endif 1775} 1776 1777// This method is a copy of JDK's sysGetLastErrorString 1778// from src/windows/hpi/src/system_md.c 1779 1780size_t os::lasterror(char* buf, size_t len) { 1781 DWORD errval; 1782 1783 if ((errval = GetLastError()) != 0) { 1784 // DOS error 1785 size_t n = (size_t)FormatMessage( 1786 FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, 1787 NULL, 1788 errval, 1789 0, 1790 buf, 1791 (DWORD)len, 1792 NULL); 1793 if (n > 3) { 1794 // Drop final '.', CR, LF 1795 if (buf[n - 1] == '\n') n--; 1796 if (buf[n - 1] == '\r') n--; 1797 if (buf[n - 1] == '.') n--; 1798 buf[n] = '\0'; 1799 } 1800 return n; 1801 } 1802 1803 if (errno != 0) { 1804 // C runtime error that has no corresponding DOS error code 1805 const char* s = strerror(errno); 1806 size_t n = strlen(s); 1807 if (n >= len) n = len - 1; 1808 strncpy(buf, s, n); 1809 buf[n] = '\0'; 1810 return n; 1811 } 1812 1813 return 0; 1814} 1815 1816int os::get_last_error() { 1817 DWORD error = GetLastError(); 1818 if (error == 0) 1819 error = errno; 1820 return (int)error; 1821} 1822 1823// sun.misc.Signal 1824// NOTE that this is a workaround for an apparent kernel bug where if 1825// a signal handler for SIGBREAK is installed then that signal handler 1826// takes priority over the console control handler for CTRL_CLOSE_EVENT. 1827// See bug 4416763. 1828static void (*sigbreakHandler)(int) = NULL; 1829 1830static void UserHandler(int sig, void *siginfo, void *context) { 1831 os::signal_notify(sig); 1832 // We need to reinstate the signal handler each time... 1833 os::signal(sig, (void*)UserHandler); 1834} 1835 1836void* os::user_handler() { 1837 return (void*) UserHandler; 1838} 1839 1840void* os::signal(int signal_number, void* handler) { 1841 if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { 1842 void (*oldHandler)(int) = sigbreakHandler; 1843 sigbreakHandler = (void (*)(int)) handler; 1844 return (void*) oldHandler; 1845 } else { 1846 return (void*)::signal(signal_number, (void (*)(int))handler); 1847 } 1848} 1849 1850void os::signal_raise(int signal_number) { 1851 raise(signal_number); 1852} 1853 1854// The Win32 C runtime library maps all console control events other than ^C 1855// into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, 1856// logoff, and shutdown events. We therefore install our own console handler 1857// that raises SIGTERM for the latter cases. 1858// 1859static BOOL WINAPI consoleHandler(DWORD event) { 1860 switch(event) { 1861 case CTRL_C_EVENT: 1862 if (is_error_reported()) { 1863 // Ctrl-C is pressed during error reporting, likely because the error 1864 // handler fails to abort. Let VM die immediately. 1865 os::die(); 1866 } 1867 1868 os::signal_raise(SIGINT); 1869 return TRUE; 1870 break; 1871 case CTRL_BREAK_EVENT: 1872 if (sigbreakHandler != NULL) { 1873 (*sigbreakHandler)(SIGBREAK); 1874 } 1875 return TRUE; 1876 break; 1877 case CTRL_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 1896int os::sigexitnum_pd(){ 1897 return NSIG; 1898} 1899 1900// a counter for each possible signal value, including signal_thread exit signal 1901static volatile jint pending_signals[NSIG+1] = { 0 }; 1902static HANDLE sig_sem; 1903 1904void 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 1930void 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 1938static 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 1980int os::signal_lookup() { 1981 return check_pending_signals(false); 1982} 1983 1984int os::signal_wait() { 1985 return check_pending_signals(true); 1986} 1987 1988// Implicit OS exception handling 1989 1990LONG 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 2013extern "C" void safepoints(); 2014extern "C" void find(int x); 2015extern "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 2031struct 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 2046struct 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 2074const 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//----------------------------------------------------------------------------- 2086LONG 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//----------------------------------------------------------------------------- 2119LONG 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. 2173static char saved_error_file[MAX_PATH] = {0}; 2174 2175void os::set_error_file(const char *logfile) { 2176 if (strlen(logfile) <= MAX_PATH) { 2177 strncpy(saved_error_file, logfile, MAX_PATH); 2178 } 2179} 2180 2181static 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//----------------------------------------------------------------------------- 2191LONG 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. 2518LONG 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) \ 2531Return 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 2539DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) 2540DEFINE_FAST_GETFIELD(jbyte, byte, Byte) 2541DEFINE_FAST_GETFIELD(jchar, char, Char) 2542DEFINE_FAST_GETFIELD(jshort, short, Short) 2543DEFINE_FAST_GETFIELD(jint, int, Int) 2544DEFINE_FAST_GETFIELD(jlong, long, Long) 2545DEFINE_FAST_GETFIELD(jfloat, float, Float) 2546DEFINE_FAST_GETFIELD(jdouble, double, Double) 2547 2548address 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 2566int os::vm_page_size() { return os::win32::vm_page_size(); } 2567int 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 2593static HANDLE _hProcess; 2594static HANDLE _hToken; 2595 2596// Container for NUMA node list info 2597class NUMANodeListHolder { 2598private: 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 2608public: 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 2647static size_t _large_page_size = 0; 2648 2649static bool resolve_functions_for_large_page_init() { 2650 return os::Kernel32Dll::GetLargePageMinimumAvailable() && 2651 os::Advapi32Dll::AdvapiAvailable(); 2652} 2653 2654static 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 2679static void cleanup_after_large_page_init() { 2680 if (_hProcess) CloseHandle(_hProcess); 2681 _hProcess = NULL; 2682 if (_hToken) CloseHandle(_hToken); 2683 _hToken = NULL; 2684} 2685 2686static 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 2726static 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 2833void 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. 2885void 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// Multiple threads can race in this code but it's not possible to unmap small sections of 2899// virtual space to get requested alignment, like posix-like os's. 2900// Windows prevents multiple thread from remapping over each other so this loop is thread-safe. 2901char* os::reserve_memory_aligned(size_t size, size_t alignment) { 2902 assert((alignment & (os::vm_allocation_granularity() - 1)) == 0, 2903 "Alignment must be a multiple of allocation granularity (page size)"); 2904 assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned"); 2905 2906 size_t extra_size = size + alignment; 2907 assert(extra_size >= size, "overflow, size is too large to allow alignment"); 2908 2909 char* aligned_base = NULL; 2910 2911 do { 2912 char* extra_base = os::reserve_memory(extra_size, NULL, alignment); 2913 if (extra_base == NULL) { 2914 return NULL; 2915 } 2916 // Do manual alignment 2917 aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment); 2918 2919 os::release_memory(extra_base, extra_size); 2920 2921 aligned_base = os::reserve_memory(size, aligned_base); 2922 2923 } while (aligned_base == NULL); 2924 2925 return aligned_base; 2926} 2927 2928char* os::pd_reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { 2929 assert((size_t)addr % os::vm_allocation_granularity() == 0, 2930 "reserve alignment"); 2931 assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); 2932 char* res; 2933 // note that if UseLargePages is on, all the areas that require interleaving 2934 // will go thru reserve_memory_special rather than thru here. 2935 bool use_individual = (UseNUMAInterleaving && !UseLargePages); 2936 if (!use_individual) { 2937 res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); 2938 } else { 2939 elapsedTimer reserveTimer; 2940 if( Verbose && PrintMiscellaneous ) reserveTimer.start(); 2941 // in numa interleaving, we have to allocate pages individually 2942 // (well really chunks of NUMAInterleaveGranularity size) 2943 res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE); 2944 if (res == NULL) { 2945 warning("NUMA page allocation failed"); 2946 } 2947 if( Verbose && PrintMiscellaneous ) { 2948 reserveTimer.stop(); 2949 tty->print_cr("reserve_memory of %Ix bytes took " JLONG_FORMAT " ms (" JLONG_FORMAT " ticks)", bytes, 2950 reserveTimer.milliseconds(), reserveTimer.ticks()); 2951 } 2952 } 2953 assert(res == NULL || addr == NULL || addr == res, 2954 "Unexpected address from reserve."); 2955 2956 return res; 2957} 2958 2959// Reserve memory at an arbitrary address, only if that area is 2960// available (and not reserved for something else). 2961char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2962 // Windows os::reserve_memory() fails of the requested address range is 2963 // not avilable. 2964 return reserve_memory(bytes, requested_addr); 2965} 2966 2967size_t os::large_page_size() { 2968 return _large_page_size; 2969} 2970 2971bool os::can_commit_large_page_memory() { 2972 // Windows only uses large page memory when the entire region is reserved 2973 // and committed in a single VirtualAlloc() call. This may change in the 2974 // future, but with Windows 2003 it's not possible to commit on demand. 2975 return false; 2976} 2977 2978bool os::can_execute_large_page_memory() { 2979 return true; 2980} 2981 2982char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { 2983 2984 const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; 2985 const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 2986 2987 // with large pages, there are two cases where we need to use Individual Allocation 2988 // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003) 2989 // 2) NUMA Interleaving is enabled, in which case we use a different node for each page 2990 if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) { 2991 if (TracePageSizes && Verbose) { 2992 tty->print_cr("Reserving large pages individually."); 2993 } 2994 char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError); 2995 if (p_buf == NULL) { 2996 // give an appropriate warning message 2997 if (UseNUMAInterleaving) { 2998 warning("NUMA large page allocation failed, UseLargePages flag ignored"); 2999 } 3000 if (UseLargePagesIndividualAllocation) { 3001 warning("Individually allocated large pages failed, " 3002 "use -XX:-UseLargePagesIndividualAllocation to turn off"); 3003 } 3004 return NULL; 3005 } 3006 3007 return p_buf; 3008 3009 } else { 3010 // normal policy just allocate it all at once 3011 DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; 3012 char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); 3013 return res; 3014 } 3015} 3016 3017bool os::release_memory_special(char* base, size_t bytes) { 3018 return release_memory(base, bytes); 3019} 3020 3021void os::print_statistics() { 3022} 3023 3024bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 3025 if (bytes == 0) { 3026 // Don't bother the OS with noops. 3027 return true; 3028 } 3029 assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); 3030 assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); 3031 // Don't attempt to print anything if the OS call fails. We're 3032 // probably low on resources, so the print itself may cause crashes. 3033 3034 // unless we have NUMAInterleaving enabled, the range of a commit 3035 // is always within a reserve covered by a single VirtualAlloc 3036 // in that case we can just do a single commit for the requested size 3037 if (!UseNUMAInterleaving) { 3038 if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) return false; 3039 if (exec) { 3040 DWORD oldprot; 3041 // Windows doc says to use VirtualProtect to get execute permissions 3042 if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) return false; 3043 } 3044 return true; 3045 } else { 3046 3047 // when NUMAInterleaving is enabled, the commit might cover a range that 3048 // came from multiple VirtualAlloc reserves (using allocate_pages_individually). 3049 // VirtualQuery can help us determine that. The RegionSize that VirtualQuery 3050 // returns represents the number of bytes that can be committed in one step. 3051 size_t bytes_remaining = bytes; 3052 char * next_alloc_addr = addr; 3053 while (bytes_remaining > 0) { 3054 MEMORY_BASIC_INFORMATION alloc_info; 3055 VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info)); 3056 size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize); 3057 if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT, PAGE_READWRITE) == NULL) 3058 return false; 3059 if (exec) { 3060 DWORD oldprot; 3061 if (!VirtualProtect(next_alloc_addr, bytes_to_rq, PAGE_EXECUTE_READWRITE, &oldprot)) 3062 return false; 3063 } 3064 bytes_remaining -= bytes_to_rq; 3065 next_alloc_addr += bytes_to_rq; 3066 } 3067 } 3068 // if we made it this far, return true 3069 return true; 3070} 3071 3072bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, 3073 bool exec) { 3074 return commit_memory(addr, size, exec); 3075} 3076 3077bool os::pd_uncommit_memory(char* addr, size_t bytes) { 3078 if (bytes == 0) { 3079 // Don't bother the OS with noops. 3080 return true; 3081 } 3082 assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); 3083 assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); 3084 return (VirtualFree(addr, bytes, MEM_DECOMMIT) != 0); 3085} 3086 3087bool os::pd_release_memory(char* addr, size_t bytes) { 3088 return VirtualFree(addr, 0, MEM_RELEASE) != 0; 3089} 3090 3091bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 3092 return os::commit_memory(addr, size); 3093} 3094 3095bool os::remove_stack_guard_pages(char* addr, size_t size) { 3096 return os::uncommit_memory(addr, size); 3097} 3098 3099// Set protections specified 3100bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3101 bool is_committed) { 3102 unsigned int p = 0; 3103 switch (prot) { 3104 case MEM_PROT_NONE: p = PAGE_NOACCESS; break; 3105 case MEM_PROT_READ: p = PAGE_READONLY; break; 3106 case MEM_PROT_RW: p = PAGE_READWRITE; break; 3107 case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; 3108 default: 3109 ShouldNotReachHere(); 3110 } 3111 3112 DWORD old_status; 3113 3114 // Strange enough, but on Win32 one can change protection only for committed 3115 // memory, not a big deal anyway, as bytes less or equal than 64K 3116 if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { 3117 fatal("cannot commit protection page"); 3118 } 3119 // One cannot use os::guard_memory() here, as on Win32 guard page 3120 // have different (one-shot) semantics, from MSDN on PAGE_GUARD: 3121 // 3122 // Pages in the region become guard pages. Any attempt to access a guard page 3123 // causes the system to raise a STATUS_GUARD_PAGE exception and turn off 3124 // the guard page status. Guard pages thus act as a one-time access alarm. 3125 return VirtualProtect(addr, bytes, p, &old_status) != 0; 3126} 3127 3128bool os::guard_memory(char* addr, size_t bytes) { 3129 DWORD old_status; 3130 return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; 3131} 3132 3133bool os::unguard_memory(char* addr, size_t bytes) { 3134 DWORD old_status; 3135 return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; 3136} 3137 3138void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3139void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { } 3140void os::numa_make_global(char *addr, size_t bytes) { } 3141void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } 3142bool os::numa_topology_changed() { return false; } 3143size_t os::numa_get_groups_num() { return MAX2(numa_node_list_holder.get_count(), 1); } 3144int os::numa_get_group_id() { return 0; } 3145size_t os::numa_get_leaf_groups(int *ids, size_t size) { 3146 if (numa_node_list_holder.get_count() == 0 && size > 0) { 3147 // Provide an answer for UMA systems 3148 ids[0] = 0; 3149 return 1; 3150 } else { 3151 // check for size bigger than actual groups_num 3152 size = MIN2(size, numa_get_groups_num()); 3153 for (int i = 0; i < (int)size; i++) { 3154 ids[i] = numa_node_list_holder.get_node_list_entry(i); 3155 } 3156 return size; 3157 } 3158} 3159 3160bool os::get_page_info(char *start, page_info* info) { 3161 return false; 3162} 3163 3164char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 3165 return end; 3166} 3167 3168char* os::non_memory_address_word() { 3169 // Must never look like an address returned by reserve_memory, 3170 // even in its subfields (as defined by the CPU immediate fields, 3171 // if the CPU splits constants across multiple instructions). 3172 return (char*)-1; 3173} 3174 3175#define MAX_ERROR_COUNT 100 3176#define SYS_THREAD_ERROR 0xffffffffUL 3177 3178void os::pd_start_thread(Thread* thread) { 3179 DWORD ret = ResumeThread(thread->osthread()->thread_handle()); 3180 // Returns previous suspend state: 3181 // 0: Thread was not suspended 3182 // 1: Thread is running now 3183 // >1: Thread is still suspended. 3184 assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back 3185} 3186 3187class HighResolutionInterval { 3188 // The default timer resolution seems to be 10 milliseconds. 3189 // (Where is this written down?) 3190 // If someone wants to sleep for only a fraction of the default, 3191 // then we set the timer resolution down to 1 millisecond for 3192 // the duration of their interval. 3193 // We carefully set the resolution back, since otherwise we 3194 // seem to incur an overhead (3%?) that we don't need. 3195 // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. 3196 // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). 3197 // Alternatively, we could compute the relative error (503/500 = .6%) and only use 3198 // timeBeginPeriod() if the relative error exceeded some threshold. 3199 // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and 3200 // to decreased efficiency related to increased timer "tick" rates. We want to minimize 3201 // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high 3202 // resolution timers running. 3203private: 3204 jlong resolution; 3205public: 3206 HighResolutionInterval(jlong ms) { 3207 resolution = ms % 10L; 3208 if (resolution != 0) { 3209 MMRESULT result = timeBeginPeriod(1L); 3210 } 3211 } 3212 ~HighResolutionInterval() { 3213 if (resolution != 0) { 3214 MMRESULT result = timeEndPeriod(1L); 3215 } 3216 resolution = 0L; 3217 } 3218}; 3219 3220int os::sleep(Thread* thread, jlong ms, bool interruptable) { 3221 jlong limit = (jlong) MAXDWORD; 3222 3223 while(ms > limit) { 3224 int res; 3225 if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) 3226 return res; 3227 ms -= limit; 3228 } 3229 3230 assert(thread == Thread::current(), "thread consistency check"); 3231 OSThread* osthread = thread->osthread(); 3232 OSThreadWaitState osts(osthread, false /* not Object.wait() */); 3233 int result; 3234 if (interruptable) { 3235 assert(thread->is_Java_thread(), "must be java thread"); 3236 JavaThread *jt = (JavaThread *) thread; 3237 ThreadBlockInVM tbivm(jt); 3238 3239 jt->set_suspend_equivalent(); 3240 // cleared by handle_special_suspend_equivalent_condition() or 3241 // java_suspend_self() via check_and_wait_while_suspended() 3242 3243 HANDLE events[1]; 3244 events[0] = osthread->interrupt_event(); 3245 HighResolutionInterval *phri=NULL; 3246 if(!ForceTimeHighResolution) 3247 phri = new HighResolutionInterval( ms ); 3248 if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { 3249 result = OS_TIMEOUT; 3250 } else { 3251 ResetEvent(osthread->interrupt_event()); 3252 osthread->set_interrupted(false); 3253 result = OS_INTRPT; 3254 } 3255 delete phri; //if it is NULL, harmless 3256 3257 // were we externally suspended while we were waiting? 3258 jt->check_and_wait_while_suspended(); 3259 } else { 3260 assert(!thread->is_Java_thread(), "must not be java thread"); 3261 Sleep((long) ms); 3262 result = OS_TIMEOUT; 3263 } 3264 return result; 3265} 3266 3267// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3268void os::infinite_sleep() { 3269 while (true) { // sleep forever ... 3270 Sleep(100000); // ... 100 seconds at a time 3271 } 3272} 3273 3274typedef BOOL (WINAPI * STTSignature)(void) ; 3275 3276os::YieldResult os::NakedYield() { 3277 // Use either SwitchToThread() or Sleep(0) 3278 // Consider passing back the return value from SwitchToThread(). 3279 if (os::Kernel32Dll::SwitchToThreadAvailable()) { 3280 return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; 3281 } else { 3282 Sleep(0); 3283 } 3284 return os::YIELD_UNKNOWN ; 3285} 3286 3287void os::yield() { os::NakedYield(); } 3288 3289void os::yield_all(int attempts) { 3290 // Yields to all threads, including threads with lower priorities 3291 Sleep(1); 3292} 3293 3294// Win32 only gives you access to seven real priorities at a time, 3295// so we compress Java's ten down to seven. It would be better 3296// if we dynamically adjusted relative priorities. 3297 3298int os::java_to_os_priority[CriticalPriority + 1] = { 3299 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3300 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3301 THREAD_PRIORITY_LOWEST, // 2 3302 THREAD_PRIORITY_BELOW_NORMAL, // 3 3303 THREAD_PRIORITY_BELOW_NORMAL, // 4 3304 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3305 THREAD_PRIORITY_NORMAL, // 6 3306 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3307 THREAD_PRIORITY_ABOVE_NORMAL, // 8 3308 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3309 THREAD_PRIORITY_HIGHEST, // 10 MaxPriority 3310 THREAD_PRIORITY_HIGHEST // 11 CriticalPriority 3311}; 3312 3313int prio_policy1[CriticalPriority + 1] = { 3314 THREAD_PRIORITY_IDLE, // 0 Entry should never be used 3315 THREAD_PRIORITY_LOWEST, // 1 MinPriority 3316 THREAD_PRIORITY_LOWEST, // 2 3317 THREAD_PRIORITY_BELOW_NORMAL, // 3 3318 THREAD_PRIORITY_BELOW_NORMAL, // 4 3319 THREAD_PRIORITY_NORMAL, // 5 NormPriority 3320 THREAD_PRIORITY_ABOVE_NORMAL, // 6 3321 THREAD_PRIORITY_ABOVE_NORMAL, // 7 3322 THREAD_PRIORITY_HIGHEST, // 8 3323 THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority 3324 THREAD_PRIORITY_TIME_CRITICAL, // 10 MaxPriority 3325 THREAD_PRIORITY_TIME_CRITICAL // 11 CriticalPriority 3326}; 3327 3328static int prio_init() { 3329 // If ThreadPriorityPolicy is 1, switch tables 3330 if (ThreadPriorityPolicy == 1) { 3331 int i; 3332 for (i = 0; i < CriticalPriority + 1; i++) { 3333 os::java_to_os_priority[i] = prio_policy1[i]; 3334 } 3335 } 3336 if (UseCriticalJavaThreadPriority) { 3337 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority] ; 3338 } 3339 return 0; 3340} 3341 3342OSReturn os::set_native_priority(Thread* thread, int priority) { 3343 if (!UseThreadPriorities) return OS_OK; 3344 bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; 3345 return ret ? OS_OK : OS_ERR; 3346} 3347 3348OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { 3349 if ( !UseThreadPriorities ) { 3350 *priority_ptr = java_to_os_priority[NormPriority]; 3351 return OS_OK; 3352 } 3353 int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); 3354 if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { 3355 assert(false, "GetThreadPriority failed"); 3356 return OS_ERR; 3357 } 3358 *priority_ptr = os_prio; 3359 return OS_OK; 3360} 3361 3362 3363// Hint to the underlying OS that a task switch would not be good. 3364// Void return because it's a hint and can fail. 3365void os::hint_no_preempt() {} 3366 3367void os::interrupt(Thread* thread) { 3368 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3369 "possibility of dangling Thread pointer"); 3370 3371 OSThread* osthread = thread->osthread(); 3372 osthread->set_interrupted(true); 3373 // More than one thread can get here with the same value of osthread, 3374 // resulting in multiple notifications. We do, however, want the store 3375 // to interrupted() to be visible to other threads before we post 3376 // the interrupt event. 3377 OrderAccess::release(); 3378 SetEvent(osthread->interrupt_event()); 3379 // For JSR166: unpark after setting status 3380 if (thread->is_Java_thread()) 3381 ((JavaThread*)thread)->parker()->unpark(); 3382 3383 ParkEvent * ev = thread->_ParkEvent ; 3384 if (ev != NULL) ev->unpark() ; 3385 3386} 3387 3388 3389bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3390 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), 3391 "possibility of dangling Thread pointer"); 3392 3393 OSThread* osthread = thread->osthread(); 3394 bool interrupted = osthread->interrupted(); 3395 // There is no synchronization between the setting of the interrupt 3396 // and it being cleared here. It is critical - see 6535709 - that 3397 // we only clear the interrupt state, and reset the interrupt event, 3398 // if we are going to report that we were indeed interrupted - else 3399 // an interrupt can be "lost", leading to spurious wakeups or lost wakeups 3400 // depending on the timing 3401 if (interrupted && clear_interrupted) { 3402 osthread->set_interrupted(false); 3403 ResetEvent(osthread->interrupt_event()); 3404 } // Otherwise leave the interrupted state alone 3405 3406 return interrupted; 3407} 3408 3409// Get's a pc (hint) for a running thread. Currently used only for profiling. 3410ExtendedPC os::get_thread_pc(Thread* thread) { 3411 CONTEXT context; 3412 context.ContextFlags = CONTEXT_CONTROL; 3413 HANDLE handle = thread->osthread()->thread_handle(); 3414#ifdef _M_IA64 3415 assert(0, "Fix get_thread_pc"); 3416 return ExtendedPC(NULL); 3417#else 3418 if (GetThreadContext(handle, &context)) { 3419#ifdef _M_AMD64 3420 return ExtendedPC((address) context.Rip); 3421#else 3422 return ExtendedPC((address) context.Eip); 3423#endif 3424 } else { 3425 return ExtendedPC(NULL); 3426 } 3427#endif 3428} 3429 3430// GetCurrentThreadId() returns DWORD 3431intx os::current_thread_id() { return GetCurrentThreadId(); } 3432 3433static int _initial_pid = 0; 3434 3435int os::current_process_id() 3436{ 3437 return (_initial_pid ? _initial_pid : _getpid()); 3438} 3439 3440int os::win32::_vm_page_size = 0; 3441int os::win32::_vm_allocation_granularity = 0; 3442int os::win32::_processor_type = 0; 3443// Processor level is not available on non-NT systems, use vm_version instead 3444int os::win32::_processor_level = 0; 3445julong os::win32::_physical_memory = 0; 3446size_t os::win32::_default_stack_size = 0; 3447 3448 intx os::win32::_os_thread_limit = 0; 3449volatile intx os::win32::_os_thread_count = 0; 3450 3451bool os::win32::_is_nt = false; 3452bool os::win32::_is_windows_2003 = false; 3453bool os::win32::_is_windows_server = false; 3454 3455void os::win32::initialize_system_info() { 3456 SYSTEM_INFO si; 3457 GetSystemInfo(&si); 3458 _vm_page_size = si.dwPageSize; 3459 _vm_allocation_granularity = si.dwAllocationGranularity; 3460 _processor_type = si.dwProcessorType; 3461 _processor_level = si.wProcessorLevel; 3462 set_processor_count(si.dwNumberOfProcessors); 3463 3464 MEMORYSTATUSEX ms; 3465 ms.dwLength = sizeof(ms); 3466 3467 // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, 3468 // dwMemoryLoad (% of memory in use) 3469 GlobalMemoryStatusEx(&ms); 3470 _physical_memory = ms.ullTotalPhys; 3471 3472 OSVERSIONINFOEX oi; 3473 oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); 3474 GetVersionEx((OSVERSIONINFO*)&oi); 3475 switch(oi.dwPlatformId) { 3476 case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; 3477 case VER_PLATFORM_WIN32_NT: 3478 _is_nt = true; 3479 { 3480 int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; 3481 if (os_vers == 5002) { 3482 _is_windows_2003 = true; 3483 } 3484 if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER || 3485 oi.wProductType == VER_NT_SERVER) { 3486 _is_windows_server = true; 3487 } 3488 } 3489 break; 3490 default: fatal("Unknown platform"); 3491 } 3492 3493 _default_stack_size = os::current_stack_size(); 3494 assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); 3495 assert((_default_stack_size & (_vm_page_size - 1)) == 0, 3496 "stack size not a multiple of page size"); 3497 3498 initialize_performance_counter(); 3499 3500 // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is 3501 // known to deadlock the system, if the VM issues to thread operations with 3502 // a too high frequency, e.g., such as changing the priorities. 3503 // The 6000 seems to work well - no deadlocks has been notices on the test 3504 // programs that we have seen experience this problem. 3505 if (!os::win32::is_nt()) { 3506 StarvationMonitorInterval = 6000; 3507 } 3508} 3509 3510 3511HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) { 3512 char path[MAX_PATH]; 3513 DWORD size; 3514 DWORD pathLen = (DWORD)sizeof(path); 3515 HINSTANCE result = NULL; 3516 3517 // only allow library name without path component 3518 assert(strchr(name, '\\') == NULL, "path not allowed"); 3519 assert(strchr(name, ':') == NULL, "path not allowed"); 3520 if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) { 3521 jio_snprintf(ebuf, ebuflen, 3522 "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name); 3523 return NULL; 3524 } 3525 3526 // search system directory 3527 if ((size = GetSystemDirectory(path, pathLen)) > 0) { 3528 strcat(path, "\\"); 3529 strcat(path, name); 3530 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3531 return result; 3532 } 3533 } 3534 3535 // try Windows directory 3536 if ((size = GetWindowsDirectory(path, pathLen)) > 0) { 3537 strcat(path, "\\"); 3538 strcat(path, name); 3539 if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) { 3540 return result; 3541 } 3542 } 3543 3544 jio_snprintf(ebuf, ebuflen, 3545 "os::win32::load_windows_dll() cannot load %s from system directories.", name); 3546 return NULL; 3547} 3548 3549void os::win32::setmode_streams() { 3550 _setmode(_fileno(stdin), _O_BINARY); 3551 _setmode(_fileno(stdout), _O_BINARY); 3552 _setmode(_fileno(stderr), _O_BINARY); 3553} 3554 3555 3556bool os::is_debugger_attached() { 3557 return IsDebuggerPresent() ? true : false; 3558} 3559 3560 3561void os::wait_for_keypress_at_exit(void) { 3562 if (PauseAtExit) { 3563 fprintf(stderr, "Press any key to continue...\n"); 3564 fgetc(stdin); 3565 } 3566} 3567 3568 3569int os::message_box(const char* title, const char* message) { 3570 int result = MessageBox(NULL, message, title, 3571 MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); 3572 return result == IDYES; 3573} 3574 3575int os::allocate_thread_local_storage() { 3576 return TlsAlloc(); 3577} 3578 3579 3580void os::free_thread_local_storage(int index) { 3581 TlsFree(index); 3582} 3583 3584 3585void os::thread_local_storage_at_put(int index, void* value) { 3586 TlsSetValue(index, value); 3587 assert(thread_local_storage_at(index) == value, "Just checking"); 3588} 3589 3590 3591void* os::thread_local_storage_at(int index) { 3592 return TlsGetValue(index); 3593} 3594 3595 3596#ifndef PRODUCT 3597#ifndef _WIN64 3598// Helpers to check whether NX protection is enabled 3599int nx_exception_filter(_EXCEPTION_POINTERS *pex) { 3600 if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && 3601 pex->ExceptionRecord->NumberParameters > 0 && 3602 pex->ExceptionRecord->ExceptionInformation[0] == 3603 EXCEPTION_INFO_EXEC_VIOLATION) { 3604 return EXCEPTION_EXECUTE_HANDLER; 3605 } 3606 return EXCEPTION_CONTINUE_SEARCH; 3607} 3608 3609void nx_check_protection() { 3610 // If NX is enabled we'll get an exception calling into code on the stack 3611 char code[] = { (char)0xC3 }; // ret 3612 void *code_ptr = (void *)code; 3613 __try { 3614 __asm call code_ptr 3615 } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { 3616 tty->print_raw_cr("NX protection detected."); 3617 } 3618} 3619#endif // _WIN64 3620#endif // PRODUCT 3621 3622// this is called _before_ the global arguments have been parsed 3623void os::init(void) { 3624 _initial_pid = _getpid(); 3625 3626 init_random(1234567); 3627 3628 win32::initialize_system_info(); 3629 win32::setmode_streams(); 3630 init_page_sizes((size_t) win32::vm_page_size()); 3631 3632 // For better scalability on MP systems (must be called after initialize_system_info) 3633#ifndef PRODUCT 3634 if (is_MP()) { 3635 NoYieldsInMicrolock = true; 3636 } 3637#endif 3638 // This may be overridden later when argument processing is done. 3639 FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, 3640 os::win32::is_windows_2003()); 3641 3642 // Initialize main_process and main_thread 3643 main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle 3644 if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, 3645 &main_thread, THREAD_ALL_ACCESS, false, 0)) { 3646 fatal("DuplicateHandle failed\n"); 3647 } 3648 main_thread_id = (int) GetCurrentThreadId(); 3649} 3650 3651// To install functions for atexit processing 3652extern "C" { 3653 static void perfMemory_exit_helper() { 3654 perfMemory_exit(); 3655 } 3656} 3657 3658// this is called _after_ the global arguments have been parsed 3659jint os::init_2(void) { 3660 // Allocate a single page and mark it as readable for safepoint polling 3661 address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); 3662 guarantee( polling_page != NULL, "Reserve Failed for polling page"); 3663 3664 address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); 3665 guarantee( return_page != NULL, "Commit Failed for polling page"); 3666 3667 os::set_polling_page( polling_page ); 3668 3669#ifndef PRODUCT 3670 if( Verbose && PrintMiscellaneous ) 3671 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 3672#endif 3673 3674 if (!UseMembar) { 3675 address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); 3676 guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); 3677 3678 return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); 3679 guarantee( return_page != NULL, "Commit Failed for memory serialize page"); 3680 3681 os::set_memory_serialize_page( mem_serialize_page ); 3682 3683#ifndef PRODUCT 3684 if(Verbose && PrintMiscellaneous) 3685 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 3686#endif 3687 } 3688 3689 os::large_page_init(); 3690 3691 // Setup Windows Exceptions 3692 3693 // for debugging float code generation bugs 3694 if (ForceFloatExceptions) { 3695#ifndef _WIN64 3696 static long fp_control_word = 0; 3697 __asm { fstcw fp_control_word } 3698 // see Intel PPro Manual, Vol. 2, p 7-16 3699 const long precision = 0x20; 3700 const long underflow = 0x10; 3701 const long overflow = 0x08; 3702 const long zero_div = 0x04; 3703 const long denorm = 0x02; 3704 const long invalid = 0x01; 3705 fp_control_word |= invalid; 3706 __asm { fldcw fp_control_word } 3707#endif 3708 } 3709 3710 // If stack_commit_size is 0, windows will reserve the default size, 3711 // but only commit a small portion of it. 3712 size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); 3713 size_t default_reserve_size = os::win32::default_stack_size(); 3714 size_t actual_reserve_size = stack_commit_size; 3715 if (stack_commit_size < default_reserve_size) { 3716 // If stack_commit_size == 0, we want this too 3717 actual_reserve_size = default_reserve_size; 3718 } 3719 3720 // Check minimum allowable stack size for thread creation and to initialize 3721 // the java system classes, including StackOverflowError - depends on page 3722 // size. Add a page for compiler2 recursion in main thread. 3723 // Add in 2*BytesPerWord times page size to account for VM stack during 3724 // class initialization depending on 32 or 64 bit VM. 3725 size_t min_stack_allowed = 3726 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 3727 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size(); 3728 if (actual_reserve_size < min_stack_allowed) { 3729 tty->print_cr("\nThe stack size specified is too small, " 3730 "Specify at least %dk", 3731 min_stack_allowed / K); 3732 return JNI_ERR; 3733 } 3734 3735 JavaThread::set_stack_size_at_create(stack_commit_size); 3736 3737 // Calculate theoretical max. size of Threads to guard gainst artifical 3738 // out-of-memory situations, where all available address-space has been 3739 // reserved by thread stacks. 3740 assert(actual_reserve_size != 0, "Must have a stack"); 3741 3742 // Calculate the thread limit when we should start doing Virtual Memory 3743 // banging. Currently when the threads will have used all but 200Mb of space. 3744 // 3745 // TODO: consider performing a similar calculation for commit size instead 3746 // as reserve size, since on a 64-bit platform we'll run into that more 3747 // often than running out of virtual memory space. We can use the 3748 // lower value of the two calculations as the os_thread_limit. 3749 size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); 3750 win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); 3751 3752 // at exit methods are called in the reverse order of their registration. 3753 // there is no limit to the number of functions registered. atexit does 3754 // not set errno. 3755 3756 if (PerfAllowAtExitRegistration) { 3757 // only register atexit functions if PerfAllowAtExitRegistration is set. 3758 // atexit functions can be delayed until process exit time, which 3759 // can be problematic for embedded VM situations. Embedded VMs should 3760 // call DestroyJavaVM() to assure that VM resources are released. 3761 3762 // note: perfMemory_exit_helper atexit function may be removed in 3763 // the future if the appropriate cleanup code can be added to the 3764 // VM_Exit VMOperation's doit method. 3765 if (atexit(perfMemory_exit_helper) != 0) { 3766 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); 3767 } 3768 } 3769 3770#ifndef _WIN64 3771 // Print something if NX is enabled (win32 on AMD64) 3772 NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); 3773#endif 3774 3775 // initialize thread priority policy 3776 prio_init(); 3777 3778 if (UseNUMA && !ForceNUMA) { 3779 UseNUMA = false; // We don't fully support this yet 3780 } 3781 3782 if (UseNUMAInterleaving) { 3783 // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag 3784 bool success = numa_interleaving_init(); 3785 if (!success) UseNUMAInterleaving = false; 3786 } 3787 3788 return JNI_OK; 3789} 3790 3791void os::init_3(void) { 3792 return; 3793} 3794 3795// Mark the polling page as unreadable 3796void os::make_polling_page_unreadable(void) { 3797 DWORD old_status; 3798 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) 3799 fatal("Could not disable polling page"); 3800}; 3801 3802// Mark the polling page as readable 3803void os::make_polling_page_readable(void) { 3804 DWORD old_status; 3805 if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) 3806 fatal("Could not enable polling page"); 3807}; 3808 3809 3810int os::stat(const char *path, struct stat *sbuf) { 3811 char pathbuf[MAX_PATH]; 3812 if (strlen(path) > MAX_PATH - 1) { 3813 errno = ENAMETOOLONG; 3814 return -1; 3815 } 3816 os::native_path(strcpy(pathbuf, path)); 3817 int ret = ::stat(pathbuf, sbuf); 3818 if (sbuf != NULL && UseUTCFileTimestamp) { 3819 // Fix for 6539723. st_mtime returned from stat() is dependent on 3820 // the system timezone and so can return different values for the 3821 // same file if/when daylight savings time changes. This adjustment 3822 // makes sure the same timestamp is returned regardless of the TZ. 3823 // 3824 // See: 3825 // http://msdn.microsoft.com/library/ 3826 // default.asp?url=/library/en-us/sysinfo/base/ 3827 // time_zone_information_str.asp 3828 // and 3829 // http://msdn.microsoft.com/library/default.asp?url= 3830 // /library/en-us/sysinfo/base/settimezoneinformation.asp 3831 // 3832 // NOTE: there is a insidious bug here: If the timezone is changed 3833 // after the call to stat() but before 'GetTimeZoneInformation()', then 3834 // the adjustment we do here will be wrong and we'll return the wrong 3835 // value (which will likely end up creating an invalid class data 3836 // archive). Absent a better API for this, or some time zone locking 3837 // mechanism, we'll have to live with this risk. 3838 TIME_ZONE_INFORMATION tz; 3839 DWORD tzid = GetTimeZoneInformation(&tz); 3840 int daylightBias = 3841 (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; 3842 sbuf->st_mtime += (tz.Bias + daylightBias) * 60; 3843 } 3844 return ret; 3845} 3846 3847 3848#define FT2INT64(ft) \ 3849 ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) 3850 3851 3852// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 3853// are used by JVM M&M and JVMTI to get user+sys or user CPU time 3854// of a thread. 3855// 3856// current_thread_cpu_time() and thread_cpu_time(Thread*) returns 3857// the fast estimate available on the platform. 3858 3859// current_thread_cpu_time() is not optimized for Windows yet 3860jlong os::current_thread_cpu_time() { 3861 // return user + sys since the cost is the same 3862 return os::thread_cpu_time(Thread::current(), true /* user+sys */); 3863} 3864 3865jlong os::thread_cpu_time(Thread* thread) { 3866 // consistent with what current_thread_cpu_time() returns. 3867 return os::thread_cpu_time(thread, true /* user+sys */); 3868} 3869 3870jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 3871 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 3872} 3873 3874jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { 3875 // This code is copy from clasic VM -> hpi::sysThreadCPUTime 3876 // If this function changes, os::is_thread_cpu_time_supported() should too 3877 if (os::win32::is_nt()) { 3878 FILETIME CreationTime; 3879 FILETIME ExitTime; 3880 FILETIME KernelTime; 3881 FILETIME UserTime; 3882 3883 if ( GetThreadTimes(thread->osthread()->thread_handle(), 3884 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3885 return -1; 3886 else 3887 if (user_sys_cpu_time) { 3888 return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; 3889 } else { 3890 return FT2INT64(UserTime) * 100; 3891 } 3892 } else { 3893 return (jlong) timeGetTime() * 1000000; 3894 } 3895} 3896 3897void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3898 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3899 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3900 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3901 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3902} 3903 3904void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 3905 info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits 3906 info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time 3907 info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time 3908 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned 3909} 3910 3911bool os::is_thread_cpu_time_supported() { 3912 // see os::thread_cpu_time 3913 if (os::win32::is_nt()) { 3914 FILETIME CreationTime; 3915 FILETIME ExitTime; 3916 FILETIME KernelTime; 3917 FILETIME UserTime; 3918 3919 if ( GetThreadTimes(GetCurrentThread(), 3920 &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) 3921 return false; 3922 else 3923 return true; 3924 } else { 3925 return false; 3926 } 3927} 3928 3929// Windows does't provide a loadavg primitive so this is stubbed out for now. 3930// It does have primitives (PDH API) to get CPU usage and run queue length. 3931// "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" 3932// If we wanted to implement loadavg on Windows, we have a few options: 3933// 3934// a) Query CPU usage and run queue length and "fake" an answer by 3935// returning the CPU usage if it's under 100%, and the run queue 3936// length otherwise. It turns out that querying is pretty slow 3937// on Windows, on the order of 200 microseconds on a fast machine. 3938// Note that on the Windows the CPU usage value is the % usage 3939// since the last time the API was called (and the first call 3940// returns 100%), so we'd have to deal with that as well. 3941// 3942// b) Sample the "fake" answer using a sampling thread and store 3943// the answer in a global variable. The call to loadavg would 3944// just return the value of the global, avoiding the slow query. 3945// 3946// c) Sample a better answer using exponential decay to smooth the 3947// value. This is basically the algorithm used by UNIX kernels. 3948// 3949// Note that sampling thread starvation could affect both (b) and (c). 3950int os::loadavg(double loadavg[], int nelem) { 3951 return -1; 3952} 3953 3954 3955// DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() 3956bool os::dont_yield() { 3957 return DontYieldALot; 3958} 3959 3960// This method is a slightly reworked copy of JDK's sysOpen 3961// from src/windows/hpi/src/sys_api_md.c 3962 3963int os::open(const char *path, int oflag, int mode) { 3964 char pathbuf[MAX_PATH]; 3965 3966 if (strlen(path) > MAX_PATH - 1) { 3967 errno = ENAMETOOLONG; 3968 return -1; 3969 } 3970 os::native_path(strcpy(pathbuf, path)); 3971 return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode); 3972} 3973 3974// Is a (classpath) directory empty? 3975bool os::dir_is_empty(const char* path) { 3976 WIN32_FIND_DATA fd; 3977 HANDLE f = FindFirstFile(path, &fd); 3978 if (f == INVALID_HANDLE_VALUE) { 3979 return true; 3980 } 3981 FindClose(f); 3982 return false; 3983} 3984 3985// create binary file, rewriting existing file if required 3986int os::create_binary_file(const char* path, bool rewrite_existing) { 3987 int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; 3988 if (!rewrite_existing) { 3989 oflags |= _O_EXCL; 3990 } 3991 return ::open(path, oflags, _S_IREAD | _S_IWRITE); 3992} 3993 3994// return current position of file pointer 3995jlong os::current_file_offset(int fd) { 3996 return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); 3997} 3998 3999// move file pointer to the specified offset 4000jlong os::seek_to_file_offset(int fd, jlong offset) { 4001 return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); 4002} 4003 4004 4005jlong os::lseek(int fd, jlong offset, int whence) { 4006 return (jlong) ::_lseeki64(fd, offset, whence); 4007} 4008 4009// This method is a slightly reworked copy of JDK's sysNativePath 4010// from src/windows/hpi/src/path_md.c 4011 4012/* Convert a pathname to native format. On win32, this involves forcing all 4013 separators to be '\\' rather than '/' (both are legal inputs, but Win95 4014 sometimes rejects '/') and removing redundant separators. The input path is 4015 assumed to have been converted into the character encoding used by the local 4016 system. Because this might be a double-byte encoding, care is taken to 4017 treat double-byte lead characters correctly. 4018 4019 This procedure modifies the given path in place, as the result is never 4020 longer than the original. There is no error return; this operation always 4021 succeeds. */ 4022char * os::native_path(char *path) { 4023 char *src = path, *dst = path, *end = path; 4024 char *colon = NULL; /* If a drive specifier is found, this will 4025 point to the colon following the drive 4026 letter */ 4027 4028 /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */ 4029 assert(((!::IsDBCSLeadByte('/')) 4030 && (!::IsDBCSLeadByte('\\')) 4031 && (!::IsDBCSLeadByte(':'))), 4032 "Illegal lead byte"); 4033 4034 /* Check for leading separators */ 4035#define isfilesep(c) ((c) == '/' || (c) == '\\') 4036 while (isfilesep(*src)) { 4037 src++; 4038 } 4039 4040 if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') { 4041 /* Remove leading separators if followed by drive specifier. This 4042 hack is necessary to support file URLs containing drive 4043 specifiers (e.g., "file://c:/path"). As a side effect, 4044 "/c:/path" can be used as an alternative to "c:/path". */ 4045 *dst++ = *src++; 4046 colon = dst; 4047 *dst++ = ':'; 4048 src++; 4049 } else { 4050 src = path; 4051 if (isfilesep(src[0]) && isfilesep(src[1])) { 4052 /* UNC pathname: Retain first separator; leave src pointed at 4053 second separator so that further separators will be collapsed 4054 into the second separator. The result will be a pathname 4055 beginning with "\\\\" followed (most likely) by a host name. */ 4056 src = dst = path + 1; 4057 path[0] = '\\'; /* Force first separator to '\\' */ 4058 } 4059 } 4060 4061 end = dst; 4062 4063 /* Remove redundant separators from remainder of path, forcing all 4064 separators to be '\\' rather than '/'. Also, single byte space 4065 characters are removed from the end of the path because those 4066 are not legal ending characters on this operating system. 4067 */ 4068 while (*src != '\0') { 4069 if (isfilesep(*src)) { 4070 *dst++ = '\\'; src++; 4071 while (isfilesep(*src)) src++; 4072 if (*src == '\0') { 4073 /* Check for trailing separator */ 4074 end = dst; 4075 if (colon == dst - 2) break; /* "z:\\" */ 4076 if (dst == path + 1) break; /* "\\" */ 4077 if (dst == path + 2 && isfilesep(path[0])) { 4078 /* "\\\\" is not collapsed to "\\" because "\\\\" marks the 4079 beginning of a UNC pathname. Even though it is not, by 4080 itself, a valid UNC pathname, we leave it as is in order 4081 to be consistent with the path canonicalizer as well 4082 as the win32 APIs, which treat this case as an invalid 4083 UNC pathname rather than as an alias for the root 4084 directory of the current drive. */ 4085 break; 4086 } 4087 end = --dst; /* Path does not denote a root directory, so 4088 remove trailing separator */ 4089 break; 4090 } 4091 end = dst; 4092 } else { 4093 if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */ 4094 *dst++ = *src++; 4095 if (*src) *dst++ = *src++; 4096 end = dst; 4097 } else { /* Copy a single-byte character */ 4098 char c = *src++; 4099 *dst++ = c; 4100 /* Space is not a legal ending character */ 4101 if (c != ' ') end = dst; 4102 } 4103 } 4104 } 4105 4106 *end = '\0'; 4107 4108 /* For "z:", add "." to work around a bug in the C runtime library */ 4109 if (colon == dst - 1) { 4110 path[2] = '.'; 4111 path[3] = '\0'; 4112 } 4113 4114 #ifdef DEBUG 4115 jio_fprintf(stderr, "sysNativePath: %s\n", path); 4116 #endif DEBUG 4117 return path; 4118} 4119 4120// This code is a copy of JDK's sysSetLength 4121// from src/windows/hpi/src/sys_api_md.c 4122 4123int os::ftruncate(int fd, jlong length) { 4124 HANDLE h = (HANDLE)::_get_osfhandle(fd); 4125 long high = (long)(length >> 32); 4126 DWORD ret; 4127 4128 if (h == (HANDLE)(-1)) { 4129 return -1; 4130 } 4131 4132 ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN); 4133 if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) { 4134 return -1; 4135 } 4136 4137 if (::SetEndOfFile(h) == FALSE) { 4138 return -1; 4139 } 4140 4141 return 0; 4142} 4143 4144 4145// This code is a copy of JDK's sysSync 4146// from src/windows/hpi/src/sys_api_md.c 4147// except for the legacy workaround for a bug in Win 98 4148 4149int os::fsync(int fd) { 4150 HANDLE handle = (HANDLE)::_get_osfhandle(fd); 4151 4152 if ( (!::FlushFileBuffers(handle)) && 4153 (GetLastError() != ERROR_ACCESS_DENIED) ) { 4154 /* from winerror.h */ 4155 return -1; 4156 } 4157 return 0; 4158} 4159 4160static int nonSeekAvailable(int, long *); 4161static int stdinAvailable(int, long *); 4162 4163#define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR) 4164#define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO) 4165 4166// This code is a copy of JDK's sysAvailable 4167// from src/windows/hpi/src/sys_api_md.c 4168 4169int os::available(int fd, jlong *bytes) { 4170 jlong cur, end; 4171 struct _stati64 stbuf64; 4172 4173 if (::_fstati64(fd, &stbuf64) >= 0) { 4174 int mode = stbuf64.st_mode; 4175 if (S_ISCHR(mode) || S_ISFIFO(mode)) { 4176 int ret; 4177 long lpbytes; 4178 if (fd == 0) { 4179 ret = stdinAvailable(fd, &lpbytes); 4180 } else { 4181 ret = nonSeekAvailable(fd, &lpbytes); 4182 } 4183 (*bytes) = (jlong)(lpbytes); 4184 return ret; 4185 } 4186 if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) { 4187 return FALSE; 4188 } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) { 4189 return FALSE; 4190 } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) { 4191 return FALSE; 4192 } 4193 *bytes = end - cur; 4194 return TRUE; 4195 } else { 4196 return FALSE; 4197 } 4198} 4199 4200// This code is a copy of JDK's nonSeekAvailable 4201// from src/windows/hpi/src/sys_api_md.c 4202 4203static int nonSeekAvailable(int fd, long *pbytes) { 4204 /* This is used for available on non-seekable devices 4205 * (like both named and anonymous pipes, such as pipes 4206 * connected to an exec'd process). 4207 * Standard Input is a special case. 4208 * 4209 */ 4210 HANDLE han; 4211 4212 if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) { 4213 return FALSE; 4214 } 4215 4216 if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) { 4217 /* PeekNamedPipe fails when at EOF. In that case we 4218 * simply make *pbytes = 0 which is consistent with the 4219 * behavior we get on Solaris when an fd is at EOF. 4220 * The only alternative is to raise an Exception, 4221 * which isn't really warranted. 4222 */ 4223 if (::GetLastError() != ERROR_BROKEN_PIPE) { 4224 return FALSE; 4225 } 4226 *pbytes = 0; 4227 } 4228 return TRUE; 4229} 4230 4231#define MAX_INPUT_EVENTS 2000 4232 4233// This code is a copy of JDK's stdinAvailable 4234// from src/windows/hpi/src/sys_api_md.c 4235 4236static int stdinAvailable(int fd, long *pbytes) { 4237 HANDLE han; 4238 DWORD numEventsRead = 0; /* Number of events read from buffer */ 4239 DWORD numEvents = 0; /* Number of events in buffer */ 4240 DWORD i = 0; /* Loop index */ 4241 DWORD curLength = 0; /* Position marker */ 4242 DWORD actualLength = 0; /* Number of bytes readable */ 4243 BOOL error = FALSE; /* Error holder */ 4244 INPUT_RECORD *lpBuffer; /* Pointer to records of input events */ 4245 4246 if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) { 4247 return FALSE; 4248 } 4249 4250 /* Construct an array of input records in the console buffer */ 4251 error = ::GetNumberOfConsoleInputEvents(han, &numEvents); 4252 if (error == 0) { 4253 return nonSeekAvailable(fd, pbytes); 4254 } 4255 4256 /* lpBuffer must fit into 64K or else PeekConsoleInput fails */ 4257 if (numEvents > MAX_INPUT_EVENTS) { 4258 numEvents = MAX_INPUT_EVENTS; 4259 } 4260 4261 lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD), mtInternal); 4262 if (lpBuffer == NULL) { 4263 return FALSE; 4264 } 4265 4266 error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead); 4267 if (error == 0) { 4268 os::free(lpBuffer, mtInternal); 4269 return FALSE; 4270 } 4271 4272 /* Examine input records for the number of bytes available */ 4273 for(i=0; i<numEvents; i++) { 4274 if (lpBuffer[i].EventType == KEY_EVENT) { 4275 4276 KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *) 4277 &(lpBuffer[i].Event); 4278 if (keyRecord->bKeyDown == TRUE) { 4279 CHAR *keyPressed = (CHAR *) &(keyRecord->uChar); 4280 curLength++; 4281 if (*keyPressed == '\r') { 4282 actualLength = curLength; 4283 } 4284 } 4285 } 4286 } 4287 4288 if(lpBuffer != NULL) { 4289 os::free(lpBuffer, mtInternal); 4290 } 4291 4292 *pbytes = (long) actualLength; 4293 return TRUE; 4294} 4295 4296// Map a block of memory. 4297char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4298 char *addr, size_t bytes, bool read_only, 4299 bool allow_exec) { 4300 HANDLE hFile; 4301 char* base; 4302 4303 hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, 4304 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 4305 if (hFile == NULL) { 4306 if (PrintMiscellaneous && Verbose) { 4307 DWORD err = GetLastError(); 4308 tty->print_cr("CreateFile() failed: GetLastError->%ld.", err); 4309 } 4310 return NULL; 4311 } 4312 4313 if (allow_exec) { 4314 // CreateFileMapping/MapViewOfFileEx can't map executable memory 4315 // unless it comes from a PE image (which the shared archive is not.) 4316 // Even VirtualProtect refuses to give execute access to mapped memory 4317 // that was not previously executable. 4318 // 4319 // Instead, stick the executable region in anonymous memory. Yuck. 4320 // Penalty is that ~4 pages will not be shareable - in the future 4321 // we might consider DLLizing the shared archive with a proper PE 4322 // header so that mapping executable + sharing is possible. 4323 4324 base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, 4325 PAGE_READWRITE); 4326 if (base == NULL) { 4327 if (PrintMiscellaneous && Verbose) { 4328 DWORD err = GetLastError(); 4329 tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); 4330 } 4331 CloseHandle(hFile); 4332 return NULL; 4333 } 4334 4335 DWORD bytes_read; 4336 OVERLAPPED overlapped; 4337 overlapped.Offset = (DWORD)file_offset; 4338 overlapped.OffsetHigh = 0; 4339 overlapped.hEvent = NULL; 4340 // ReadFile guarantees that if the return value is true, the requested 4341 // number of bytes were read before returning. 4342 bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; 4343 if (!res) { 4344 if (PrintMiscellaneous && Verbose) { 4345 DWORD err = GetLastError(); 4346 tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); 4347 } 4348 release_memory(base, bytes); 4349 CloseHandle(hFile); 4350 return NULL; 4351 } 4352 } else { 4353 HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, 4354 NULL /*file_name*/); 4355 if (hMap == NULL) { 4356 if (PrintMiscellaneous && Verbose) { 4357 DWORD err = GetLastError(); 4358 tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.", err); 4359 } 4360 CloseHandle(hFile); 4361 return NULL; 4362 } 4363 4364 DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; 4365 base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, 4366 (DWORD)bytes, addr); 4367 if (base == NULL) { 4368 if (PrintMiscellaneous && Verbose) { 4369 DWORD err = GetLastError(); 4370 tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); 4371 } 4372 CloseHandle(hMap); 4373 CloseHandle(hFile); 4374 return NULL; 4375 } 4376 4377 if (CloseHandle(hMap) == 0) { 4378 if (PrintMiscellaneous && Verbose) { 4379 DWORD err = GetLastError(); 4380 tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); 4381 } 4382 CloseHandle(hFile); 4383 return base; 4384 } 4385 } 4386 4387 if (allow_exec) { 4388 DWORD old_protect; 4389 DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; 4390 bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; 4391 4392 if (!res) { 4393 if (PrintMiscellaneous && Verbose) { 4394 DWORD err = GetLastError(); 4395 tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); 4396 } 4397 // Don't consider this a hard error, on IA32 even if the 4398 // VirtualProtect fails, we should still be able to execute 4399 CloseHandle(hFile); 4400 return base; 4401 } 4402 } 4403 4404 if (CloseHandle(hFile) == 0) { 4405 if (PrintMiscellaneous && Verbose) { 4406 DWORD err = GetLastError(); 4407 tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); 4408 } 4409 return base; 4410 } 4411 4412 return base; 4413} 4414 4415 4416// Remap a block of memory. 4417char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4418 char *addr, size_t bytes, bool read_only, 4419 bool allow_exec) { 4420 // This OS does not allow existing memory maps to be remapped so we 4421 // have to unmap the memory before we remap it. 4422 if (!os::unmap_memory(addr, bytes)) { 4423 return NULL; 4424 } 4425 4426 // There is a very small theoretical window between the unmap_memory() 4427 // call above and the map_memory() call below where a thread in native 4428 // code may be able to access an address that is no longer mapped. 4429 4430 return os::map_memory(fd, file_name, file_offset, addr, bytes, 4431 read_only, allow_exec); 4432} 4433 4434 4435// Unmap a block of memory. 4436// Returns true=success, otherwise false. 4437 4438bool os::pd_unmap_memory(char* addr, size_t bytes) { 4439 BOOL result = UnmapViewOfFile(addr); 4440 if (result == 0) { 4441 if (PrintMiscellaneous && Verbose) { 4442 DWORD err = GetLastError(); 4443 tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); 4444 } 4445 return false; 4446 } 4447 return true; 4448} 4449 4450void os::pause() { 4451 char filename[MAX_PATH]; 4452 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4453 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4454 } else { 4455 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4456 } 4457 4458 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4459 if (fd != -1) { 4460 struct stat buf; 4461 ::close(fd); 4462 while (::stat(filename, &buf) == 0) { 4463 Sleep(100); 4464 } 4465 } else { 4466 jio_fprintf(stderr, 4467 "Could not open pause file '%s', continuing immediately.\n", filename); 4468 } 4469} 4470 4471// An Event wraps a win32 "CreateEvent" kernel handle. 4472// 4473// We have a number of choices regarding "CreateEvent" win32 handle leakage: 4474// 4475// 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle 4476// field, and call CloseHandle() on the win32 event handle. Unpark() would 4477// need to be modified to tolerate finding a NULL (invalid) win32 event handle. 4478// In addition, an unpark() operation might fetch the handle field, but the 4479// event could recycle between the fetch and the SetEvent() operation. 4480// SetEvent() would either fail because the handle was invalid, or inadvertently work, 4481// as the win32 handle value had been recycled. In an ideal world calling SetEvent() 4482// on an stale but recycled handle would be harmless, but in practice this might 4483// confuse other non-Sun code, so it's not a viable approach. 4484// 4485// 2: Once a win32 event handle is associated with an Event, it remains associated 4486// with the Event. The event handle is never closed. This could be construed 4487// as handle leakage, but only up to the maximum # of threads that have been extant 4488// at any one time. This shouldn't be an issue, as windows platforms typically 4489// permit a process to have hundreds of thousands of open handles. 4490// 4491// 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList 4492// and release unused handles. 4493// 4494// 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. 4495// It's not clear, however, that we wouldn't be trading one type of leak for another. 4496// 4497// 5. Use an RCU-like mechanism (Read-Copy Update). 4498// Or perhaps something similar to Maged Michael's "Hazard pointers". 4499// 4500// We use (2). 4501// 4502// TODO-FIXME: 4503// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. 4504// 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks 4505// to recover from (or at least detect) the dreaded Windows 841176 bug. 4506// 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent 4507// into a single win32 CreateEvent() handle. 4508// 4509// _Event transitions in park() 4510// -1 => -1 : illegal 4511// 1 => 0 : pass - return immediately 4512// 0 => -1 : block 4513// 4514// _Event serves as a restricted-range semaphore : 4515// -1 : thread is blocked 4516// 0 : neutral - thread is running or ready 4517// 1 : signaled - thread is running or ready 4518// 4519// Another possible encoding of _Event would be 4520// with explicit "PARKED" and "SIGNALED" bits. 4521 4522int os::PlatformEvent::park (jlong Millis) { 4523 guarantee (_ParkHandle != NULL , "Invariant") ; 4524 guarantee (Millis > 0 , "Invariant") ; 4525 int v ; 4526 4527 // CONSIDER: defer assigning a CreateEvent() handle to the Event until 4528 // the initial park() operation. 4529 4530 for (;;) { 4531 v = _Event ; 4532 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4533 } 4534 guarantee ((v == 0) || (v == 1), "invariant") ; 4535 if (v != 0) return OS_OK ; 4536 4537 // Do this the hard way by blocking ... 4538 // TODO: consider a brief spin here, gated on the success of recent 4539 // spin attempts by this thread. 4540 // 4541 // We decompose long timeouts into series of shorter timed waits. 4542 // Evidently large timo values passed in WaitForSingleObject() are problematic on some 4543 // versions of Windows. See EventWait() for details. This may be superstition. Or not. 4544 // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time 4545 // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from 4546 // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend 4547 // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == 4548 // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate 4549 // for the already waited time. This policy does not admit any new outcomes. 4550 // In the future, however, we might want to track the accumulated wait time and 4551 // adjust Millis accordingly if we encounter a spurious wakeup. 4552 4553 const int MAXTIMEOUT = 0x10000000 ; 4554 DWORD rv = WAIT_TIMEOUT ; 4555 while (_Event < 0 && Millis > 0) { 4556 DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) 4557 if (Millis > MAXTIMEOUT) { 4558 prd = MAXTIMEOUT ; 4559 } 4560 rv = ::WaitForSingleObject (_ParkHandle, prd) ; 4561 assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; 4562 if (rv == WAIT_TIMEOUT) { 4563 Millis -= prd ; 4564 } 4565 } 4566 v = _Event ; 4567 _Event = 0 ; 4568 // see comment at end of os::PlatformEvent::park() below: 4569 OrderAccess::fence() ; 4570 // If we encounter a nearly simultanous timeout expiry and unpark() 4571 // we return OS_OK indicating we awoke via unpark(). 4572 // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. 4573 return (v >= 0) ? OS_OK : OS_TIMEOUT ; 4574} 4575 4576void os::PlatformEvent::park () { 4577 guarantee (_ParkHandle != NULL, "Invariant") ; 4578 // Invariant: Only the thread associated with the Event/PlatformEvent 4579 // may call park(). 4580 int v ; 4581 for (;;) { 4582 v = _Event ; 4583 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 4584 } 4585 guarantee ((v == 0) || (v == 1), "invariant") ; 4586 if (v != 0) return ; 4587 4588 // Do this the hard way by blocking ... 4589 // TODO: consider a brief spin here, gated on the success of recent 4590 // spin attempts by this thread. 4591 while (_Event < 0) { 4592 DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; 4593 assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; 4594 } 4595 4596 // Usually we'll find _Event == 0 at this point, but as 4597 // an optional optimization we clear it, just in case can 4598 // multiple unpark() operations drove _Event up to 1. 4599 _Event = 0 ; 4600 OrderAccess::fence() ; 4601 guarantee (_Event >= 0, "invariant") ; 4602} 4603 4604void os::PlatformEvent::unpark() { 4605 guarantee (_ParkHandle != NULL, "Invariant") ; 4606 4607 // Transitions for _Event: 4608 // 0 :=> 1 4609 // 1 :=> 1 4610 // -1 :=> either 0 or 1; must signal target thread 4611 // That is, we can safely transition _Event from -1 to either 4612 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back 4613 // unpark() calls. 4614 // See also: "Semaphores in Plan 9" by Mullender & Cox 4615 // 4616 // Note: Forcing a transition from "-1" to "1" on an unpark() means 4617 // that it will take two back-to-back park() calls for the owning 4618 // thread to block. This has the benefit of forcing a spurious return 4619 // from the first park() call after an unpark() call which will help 4620 // shake out uses of park() and unpark() without condition variables. 4621 4622 if (Atomic::xchg(1, &_Event) >= 0) return; 4623 4624 ::SetEvent(_ParkHandle); 4625} 4626 4627 4628// JSR166 4629// ------------------------------------------------------- 4630 4631/* 4632 * The Windows implementation of Park is very straightforward: Basic 4633 * operations on Win32 Events turn out to have the right semantics to 4634 * use them directly. We opportunistically resuse the event inherited 4635 * from Monitor. 4636 */ 4637 4638 4639void Parker::park(bool isAbsolute, jlong time) { 4640 guarantee (_ParkEvent != NULL, "invariant") ; 4641 // First, demultiplex/decode time arguments 4642 if (time < 0) { // don't wait 4643 return; 4644 } 4645 else if (time == 0 && !isAbsolute) { 4646 time = INFINITE; 4647 } 4648 else if (isAbsolute) { 4649 time -= os::javaTimeMillis(); // convert to relative time 4650 if (time <= 0) // already elapsed 4651 return; 4652 } 4653 else { // relative 4654 time /= 1000000; // Must coarsen from nanos to millis 4655 if (time == 0) // Wait for the minimal time unit if zero 4656 time = 1; 4657 } 4658 4659 JavaThread* thread = (JavaThread*)(Thread::current()); 4660 assert(thread->is_Java_thread(), "Must be JavaThread"); 4661 JavaThread *jt = (JavaThread *)thread; 4662 4663 // Don't wait if interrupted or already triggered 4664 if (Thread::is_interrupted(thread, false) || 4665 WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { 4666 ResetEvent(_ParkEvent); 4667 return; 4668 } 4669 else { 4670 ThreadBlockInVM tbivm(jt); 4671 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 4672 jt->set_suspend_equivalent(); 4673 4674 WaitForSingleObject(_ParkEvent, time); 4675 ResetEvent(_ParkEvent); 4676 4677 // If externally suspended while waiting, re-suspend 4678 if (jt->handle_special_suspend_equivalent_condition()) { 4679 jt->java_suspend_self(); 4680 } 4681 } 4682} 4683 4684void Parker::unpark() { 4685 guarantee (_ParkEvent != NULL, "invariant") ; 4686 SetEvent(_ParkEvent); 4687} 4688 4689// Run the specified command in a separate process. Return its exit value, 4690// or -1 on failure (e.g. can't create a new process). 4691int os::fork_and_exec(char* cmd) { 4692 STARTUPINFO si; 4693 PROCESS_INFORMATION pi; 4694 4695 memset(&si, 0, sizeof(si)); 4696 si.cb = sizeof(si); 4697 memset(&pi, 0, sizeof(pi)); 4698 BOOL rslt = CreateProcess(NULL, // executable name - use command line 4699 cmd, // command line 4700 NULL, // process security attribute 4701 NULL, // thread security attribute 4702 TRUE, // inherits system handles 4703 0, // no creation flags 4704 NULL, // use parent's environment block 4705 NULL, // use parent's starting directory 4706 &si, // (in) startup information 4707 &pi); // (out) process information 4708 4709 if (rslt) { 4710 // Wait until child process exits. 4711 WaitForSingleObject(pi.hProcess, INFINITE); 4712 4713 DWORD exit_code; 4714 GetExitCodeProcess(pi.hProcess, &exit_code); 4715 4716 // Close process and thread handles. 4717 CloseHandle(pi.hProcess); 4718 CloseHandle(pi.hThread); 4719 4720 return (int)exit_code; 4721 } else { 4722 return -1; 4723 } 4724} 4725 4726//-------------------------------------------------------------------------------------------------- 4727// Non-product code 4728 4729static int mallocDebugIntervalCounter = 0; 4730static int mallocDebugCounter = 0; 4731bool os::check_heap(bool force) { 4732 if (++mallocDebugCounter < MallocVerifyStart && !force) return true; 4733 if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { 4734 // Note: HeapValidate executes two hardware breakpoints when it finds something 4735 // wrong; at these points, eax contains the address of the offending block (I think). 4736 // To get to the exlicit error message(s) below, just continue twice. 4737 HANDLE heap = GetProcessHeap(); 4738 { HeapLock(heap); 4739 PROCESS_HEAP_ENTRY phe; 4740 phe.lpData = NULL; 4741 while (HeapWalk(heap, &phe) != 0) { 4742 if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && 4743 !HeapValidate(heap, 0, phe.lpData)) { 4744 tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); 4745 tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); 4746 fatal("corrupted C heap"); 4747 } 4748 } 4749 DWORD err = GetLastError(); 4750 if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { 4751 fatal(err_msg("heap walk aborted with error %d", err)); 4752 } 4753 HeapUnlock(heap); 4754 } 4755 mallocDebugIntervalCounter = 0; 4756 } 4757 return true; 4758} 4759 4760 4761bool os::find(address addr, outputStream* st) { 4762 // Nothing yet 4763 return false; 4764} 4765 4766LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { 4767 DWORD exception_code = e->ExceptionRecord->ExceptionCode; 4768 4769 if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { 4770 JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); 4771 PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; 4772 address addr = (address) exceptionRecord->ExceptionInformation[1]; 4773 4774 if (os::is_memory_serialize_page(thread, addr)) 4775 return EXCEPTION_CONTINUE_EXECUTION; 4776 } 4777 4778 return EXCEPTION_CONTINUE_SEARCH; 4779} 4780 4781// We don't build a headless jre for Windows 4782bool os::is_headless_jre() { return false; } 4783 4784 4785typedef CRITICAL_SECTION mutex_t; 4786#define mutexInit(m) InitializeCriticalSection(m) 4787#define mutexDestroy(m) DeleteCriticalSection(m) 4788#define mutexLock(m) EnterCriticalSection(m) 4789#define mutexUnlock(m) LeaveCriticalSection(m) 4790 4791static bool sock_initialized = FALSE; 4792static mutex_t sockFnTableMutex; 4793 4794static void initSock() { 4795 WSADATA wsadata; 4796 4797 if (!os::WinSock2Dll::WinSock2Available()) { 4798 jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n", 4799 ::GetLastError()); 4800 return; 4801 } 4802 if (sock_initialized == TRUE) return; 4803 4804 ::mutexInit(&sockFnTableMutex); 4805 ::mutexLock(&sockFnTableMutex); 4806 if (os::WinSock2Dll::WSAStartup(MAKEWORD(1,1), &wsadata) != 0) { 4807 jio_fprintf(stderr, "Could not initialize Winsock\n"); 4808 } 4809 sock_initialized = TRUE; 4810 ::mutexUnlock(&sockFnTableMutex); 4811} 4812 4813struct hostent* os::get_host_by_name(char* name) { 4814 if (!sock_initialized) { 4815 initSock(); 4816 } 4817 if (!os::WinSock2Dll::WinSock2Available()) { 4818 return NULL; 4819 } 4820 return (struct hostent*)os::WinSock2Dll::gethostbyname(name); 4821} 4822 4823int os::socket_close(int fd) { 4824 return ::closesocket(fd); 4825} 4826 4827int os::socket_available(int fd, jint *pbytes) { 4828 int ret = ::ioctlsocket(fd, FIONREAD, (u_long*)pbytes); 4829 return (ret < 0) ? 0 : 1; 4830} 4831 4832int os::socket(int domain, int type, int protocol) { 4833 return ::socket(domain, type, protocol); 4834} 4835 4836int os::listen(int fd, int count) { 4837 return ::listen(fd, count); 4838} 4839 4840int os::connect(int fd, struct sockaddr* him, socklen_t len) { 4841 return ::connect(fd, him, len); 4842} 4843 4844int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 4845 return ::accept(fd, him, len); 4846} 4847 4848int os::sendto(int fd, char* buf, size_t len, uint flags, 4849 struct sockaddr* to, socklen_t tolen) { 4850 4851 return ::sendto(fd, buf, (int)len, flags, to, tolen); 4852} 4853 4854int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags, 4855 sockaddr* from, socklen_t* fromlen) { 4856 4857 return ::recvfrom(fd, buf, (int)nBytes, flags, from, fromlen); 4858} 4859 4860int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 4861 return ::recv(fd, buf, (int)nBytes, flags); 4862} 4863 4864int os::send(int fd, char* buf, size_t nBytes, uint flags) { 4865 return ::send(fd, buf, (int)nBytes, flags); 4866} 4867 4868int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 4869 return ::send(fd, buf, (int)nBytes, flags); 4870} 4871 4872int os::timeout(int fd, long timeout) { 4873 fd_set tbl; 4874 struct timeval t; 4875 4876 t.tv_sec = timeout / 1000; 4877 t.tv_usec = (timeout % 1000) * 1000; 4878 4879 tbl.fd_count = 1; 4880 tbl.fd_array[0] = fd; 4881 4882 return ::select(1, &tbl, 0, 0, &t); 4883} 4884 4885int os::get_host_name(char* name, int namelen) { 4886 return ::gethostname(name, namelen); 4887} 4888 4889int os::socket_shutdown(int fd, int howto) { 4890 return ::shutdown(fd, howto); 4891} 4892 4893int os::bind(int fd, struct sockaddr* him, socklen_t len) { 4894 return ::bind(fd, him, len); 4895} 4896 4897int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 4898 return ::getsockname(fd, him, len); 4899} 4900 4901int os::get_sock_opt(int fd, int level, int optname, 4902 char* optval, socklen_t* optlen) { 4903 return ::getsockopt(fd, level, optname, optval, optlen); 4904} 4905 4906int os::set_sock_opt(int fd, int level, int optname, 4907 const char* optval, socklen_t optlen) { 4908 return ::setsockopt(fd, level, optname, optval, optlen); 4909} 4910 4911 4912// Kernel32 API 4913typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void); 4914typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD); 4915typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG); 4916typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG); 4917typedef USHORT (WINAPI* RtlCaptureStackBackTrace_Fn)(ULONG, ULONG, PVOID*, PULONG); 4918 4919GetLargePageMinimum_Fn os::Kernel32Dll::_GetLargePageMinimum = NULL; 4920VirtualAllocExNuma_Fn os::Kernel32Dll::_VirtualAllocExNuma = NULL; 4921GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL; 4922GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL; 4923RtlCaptureStackBackTrace_Fn os::Kernel32Dll::_RtlCaptureStackBackTrace = NULL; 4924 4925 4926BOOL os::Kernel32Dll::initialized = FALSE; 4927SIZE_T os::Kernel32Dll::GetLargePageMinimum() { 4928 assert(initialized && _GetLargePageMinimum != NULL, 4929 "GetLargePageMinimumAvailable() not yet called"); 4930 return _GetLargePageMinimum(); 4931} 4932 4933BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() { 4934 if (!initialized) { 4935 initialize(); 4936 } 4937 return _GetLargePageMinimum != NULL; 4938} 4939 4940BOOL os::Kernel32Dll::NumaCallsAvailable() { 4941 if (!initialized) { 4942 initialize(); 4943 } 4944 return _VirtualAllocExNuma != NULL; 4945} 4946 4947LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) { 4948 assert(initialized && _VirtualAllocExNuma != NULL, 4949 "NUMACallsAvailable() not yet called"); 4950 4951 return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node); 4952} 4953 4954BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) { 4955 assert(initialized && _GetNumaHighestNodeNumber != NULL, 4956 "NUMACallsAvailable() not yet called"); 4957 4958 return _GetNumaHighestNodeNumber(ptr_highest_node_number); 4959} 4960 4961BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) { 4962 assert(initialized && _GetNumaNodeProcessorMask != NULL, 4963 "NUMACallsAvailable() not yet called"); 4964 4965 return _GetNumaNodeProcessorMask(node, proc_mask); 4966} 4967 4968USHORT os::Kernel32Dll::RtlCaptureStackBackTrace(ULONG FrameToSkip, 4969 ULONG FrameToCapture, PVOID* BackTrace, PULONG BackTraceHash) { 4970 if (!initialized) { 4971 initialize(); 4972 } 4973 4974 if (_RtlCaptureStackBackTrace != NULL) { 4975 return _RtlCaptureStackBackTrace(FrameToSkip, FrameToCapture, 4976 BackTrace, BackTraceHash); 4977 } else { 4978 return 0; 4979 } 4980} 4981 4982void os::Kernel32Dll::initializeCommon() { 4983 if (!initialized) { 4984 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 4985 assert(handle != NULL, "Just check"); 4986 _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum"); 4987 _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma"); 4988 _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber"); 4989 _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask"); 4990 _RtlCaptureStackBackTrace = (RtlCaptureStackBackTrace_Fn)::GetProcAddress(handle, "RtlCaptureStackBackTrace"); 4991 initialized = TRUE; 4992 } 4993} 4994 4995 4996 4997#ifndef JDK6_OR_EARLIER 4998 4999void os::Kernel32Dll::initialize() { 5000 initializeCommon(); 5001} 5002 5003 5004// Kernel32 API 5005inline BOOL os::Kernel32Dll::SwitchToThread() { 5006 return ::SwitchToThread(); 5007} 5008 5009inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5010 return true; 5011} 5012 5013 // Help tools 5014inline BOOL os::Kernel32Dll::HelpToolsAvailable() { 5015 return true; 5016} 5017 5018inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5019 return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5020} 5021 5022inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5023 return ::Module32First(hSnapshot, lpme); 5024} 5025 5026inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5027 return ::Module32Next(hSnapshot, lpme); 5028} 5029 5030 5031inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5032 return true; 5033} 5034 5035inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5036 ::GetNativeSystemInfo(lpSystemInfo); 5037} 5038 5039// PSAPI API 5040inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5041 return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5042} 5043 5044inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5045 return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5046} 5047 5048inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5049 return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5050} 5051 5052inline BOOL os::PSApiDll::PSApiAvailable() { 5053 return true; 5054} 5055 5056 5057// WinSock2 API 5058inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5059 return ::WSAStartup(wVersionRequested, lpWSAData); 5060} 5061 5062inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5063 return ::gethostbyname(name); 5064} 5065 5066inline BOOL os::WinSock2Dll::WinSock2Available() { 5067 return true; 5068} 5069 5070// Advapi API 5071inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5072 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5073 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5074 return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5075 BufferLength, PreviousState, ReturnLength); 5076} 5077 5078inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5079 PHANDLE TokenHandle) { 5080 return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5081} 5082 5083inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5084 return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5085} 5086 5087inline BOOL os::Advapi32Dll::AdvapiAvailable() { 5088 return true; 5089} 5090 5091#else 5092// Kernel32 API 5093typedef BOOL (WINAPI* SwitchToThread_Fn)(void); 5094typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD); 5095typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32); 5096typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32); 5097typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO); 5098 5099SwitchToThread_Fn os::Kernel32Dll::_SwitchToThread = NULL; 5100CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL; 5101Module32First_Fn os::Kernel32Dll::_Module32First = NULL; 5102Module32Next_Fn os::Kernel32Dll::_Module32Next = NULL; 5103GetNativeSystemInfo_Fn os::Kernel32Dll::_GetNativeSystemInfo = NULL; 5104 5105void os::Kernel32Dll::initialize() { 5106 if (!initialized) { 5107 HMODULE handle = ::GetModuleHandle("Kernel32.dll"); 5108 assert(handle != NULL, "Just check"); 5109 5110 _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread"); 5111 _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn) 5112 ::GetProcAddress(handle, "CreateToolhelp32Snapshot"); 5113 _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First"); 5114 _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next"); 5115 _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo"); 5116 initializeCommon(); // resolve the functions that always need resolving 5117 5118 initialized = TRUE; 5119 } 5120} 5121 5122BOOL os::Kernel32Dll::SwitchToThread() { 5123 assert(initialized && _SwitchToThread != NULL, 5124 "SwitchToThreadAvailable() not yet called"); 5125 return _SwitchToThread(); 5126} 5127 5128 5129BOOL os::Kernel32Dll::SwitchToThreadAvailable() { 5130 if (!initialized) { 5131 initialize(); 5132 } 5133 return _SwitchToThread != NULL; 5134} 5135 5136// Help tools 5137BOOL os::Kernel32Dll::HelpToolsAvailable() { 5138 if (!initialized) { 5139 initialize(); 5140 } 5141 return _CreateToolhelp32Snapshot != NULL && 5142 _Module32First != NULL && 5143 _Module32Next != NULL; 5144} 5145 5146HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) { 5147 assert(initialized && _CreateToolhelp32Snapshot != NULL, 5148 "HelpToolsAvailable() not yet called"); 5149 5150 return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId); 5151} 5152 5153BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5154 assert(initialized && _Module32First != NULL, 5155 "HelpToolsAvailable() not yet called"); 5156 5157 return _Module32First(hSnapshot, lpme); 5158} 5159 5160inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) { 5161 assert(initialized && _Module32Next != NULL, 5162 "HelpToolsAvailable() not yet called"); 5163 5164 return _Module32Next(hSnapshot, lpme); 5165} 5166 5167 5168BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() { 5169 if (!initialized) { 5170 initialize(); 5171 } 5172 return _GetNativeSystemInfo != NULL; 5173} 5174 5175void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) { 5176 assert(initialized && _GetNativeSystemInfo != NULL, 5177 "GetNativeSystemInfoAvailable() not yet called"); 5178 5179 _GetNativeSystemInfo(lpSystemInfo); 5180} 5181 5182// PSAPI API 5183 5184 5185typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD); 5186typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);; 5187typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD); 5188 5189EnumProcessModules_Fn os::PSApiDll::_EnumProcessModules = NULL; 5190GetModuleFileNameEx_Fn os::PSApiDll::_GetModuleFileNameEx = NULL; 5191GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL; 5192BOOL os::PSApiDll::initialized = FALSE; 5193 5194void os::PSApiDll::initialize() { 5195 if (!initialized) { 5196 HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0); 5197 if (handle != NULL) { 5198 _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle, 5199 "EnumProcessModules"); 5200 _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle, 5201 "GetModuleFileNameExA"); 5202 _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle, 5203 "GetModuleInformation"); 5204 } 5205 initialized = TRUE; 5206 } 5207} 5208 5209 5210 5211BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) { 5212 assert(initialized && _EnumProcessModules != NULL, 5213 "PSApiAvailable() not yet called"); 5214 return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded); 5215} 5216 5217DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) { 5218 assert(initialized && _GetModuleFileNameEx != NULL, 5219 "PSApiAvailable() not yet called"); 5220 return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize); 5221} 5222 5223BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) { 5224 assert(initialized && _GetModuleInformation != NULL, 5225 "PSApiAvailable() not yet called"); 5226 return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb); 5227} 5228 5229BOOL os::PSApiDll::PSApiAvailable() { 5230 if (!initialized) { 5231 initialize(); 5232 } 5233 return _EnumProcessModules != NULL && 5234 _GetModuleFileNameEx != NULL && 5235 _GetModuleInformation != NULL; 5236} 5237 5238 5239// WinSock2 API 5240typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA); 5241typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...); 5242 5243WSAStartup_Fn os::WinSock2Dll::_WSAStartup = NULL; 5244gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL; 5245BOOL os::WinSock2Dll::initialized = FALSE; 5246 5247void os::WinSock2Dll::initialize() { 5248 if (!initialized) { 5249 HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0); 5250 if (handle != NULL) { 5251 _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup"); 5252 _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname"); 5253 } 5254 initialized = TRUE; 5255 } 5256} 5257 5258 5259BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) { 5260 assert(initialized && _WSAStartup != NULL, 5261 "WinSock2Available() not yet called"); 5262 return _WSAStartup(wVersionRequested, lpWSAData); 5263} 5264 5265struct hostent* os::WinSock2Dll::gethostbyname(const char *name) { 5266 assert(initialized && _gethostbyname != NULL, 5267 "WinSock2Available() not yet called"); 5268 return _gethostbyname(name); 5269} 5270 5271BOOL os::WinSock2Dll::WinSock2Available() { 5272 if (!initialized) { 5273 initialize(); 5274 } 5275 return _WSAStartup != NULL && 5276 _gethostbyname != NULL; 5277} 5278 5279typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); 5280typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE); 5281typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID); 5282 5283AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL; 5284OpenProcessToken_Fn os::Advapi32Dll::_OpenProcessToken = NULL; 5285LookupPrivilegeValue_Fn os::Advapi32Dll::_LookupPrivilegeValue = NULL; 5286BOOL os::Advapi32Dll::initialized = FALSE; 5287 5288void os::Advapi32Dll::initialize() { 5289 if (!initialized) { 5290 HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0); 5291 if (handle != NULL) { 5292 _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle, 5293 "AdjustTokenPrivileges"); 5294 _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle, 5295 "OpenProcessToken"); 5296 _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle, 5297 "LookupPrivilegeValueA"); 5298 } 5299 initialized = TRUE; 5300 } 5301} 5302 5303BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle, 5304 BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength, 5305 PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) { 5306 assert(initialized && _AdjustTokenPrivileges != NULL, 5307 "AdvapiAvailable() not yet called"); 5308 return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState, 5309 BufferLength, PreviousState, ReturnLength); 5310} 5311 5312BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess, 5313 PHANDLE TokenHandle) { 5314 assert(initialized && _OpenProcessToken != NULL, 5315 "AdvapiAvailable() not yet called"); 5316 return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle); 5317} 5318 5319BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) { 5320 assert(initialized && _LookupPrivilegeValue != NULL, 5321 "AdvapiAvailable() not yet called"); 5322 return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid); 5323} 5324 5325BOOL os::Advapi32Dll::AdvapiAvailable() { 5326 if (!initialized) { 5327 initialize(); 5328 } 5329 return _AdjustTokenPrivileges != NULL && 5330 _OpenProcessToken != NULL && 5331 _LookupPrivilegeValue != NULL; 5332} 5333 5334#endif 5335