duke@435: /* trims@1907: * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * trims@1907: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA trims@1907: * or visit www.oracle.com if you need additional information or have any trims@1907: * questions. duke@435: * duke@435: */ duke@435: duke@435: #ifdef _WIN64 duke@435: // Must be at least Windows 2000 or XP to use VectoredExceptions duke@435: #define _WIN32_WINNT 0x500 duke@435: #endif duke@435: duke@435: // do not include precompiled header file duke@435: # include "incls/_os_windows.cpp.incl" duke@435: duke@435: #ifdef _DEBUG duke@435: #include duke@435: #endif duke@435: duke@435: duke@435: #include duke@435: #include duke@435: #include duke@435: #include duke@435: #include duke@435: #include duke@435: duke@435: #include duke@435: #include duke@435: #include duke@435: #include duke@435: #include duke@435: #include duke@435: #include // For _beginthreadex(), _endthreadex() duke@435: #include // For os::dll_address_to_function_name duke@435: duke@435: /* for enumerating dll libraries */ duke@435: #include duke@435: #include duke@435: duke@435: // for timer info max values which include all bits duke@435: #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) duke@435: duke@435: // For DLL loading/load error detection duke@435: // Values of PE COFF duke@435: #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c duke@435: #define IMAGE_FILE_SIGNATURE_LENGTH 4 duke@435: duke@435: static HANDLE main_process; duke@435: static HANDLE main_thread; duke@435: static int main_thread_id; duke@435: duke@435: static FILETIME process_creation_time; duke@435: static FILETIME process_exit_time; duke@435: static FILETIME process_user_time; duke@435: static FILETIME process_kernel_time; duke@435: duke@435: #ifdef _WIN64 duke@435: PVOID topLevelVectoredExceptionHandler = NULL; duke@435: #endif duke@435: duke@435: #ifdef _M_IA64 duke@435: #define __CPU__ ia64 duke@435: #elif _M_AMD64 duke@435: #define __CPU__ amd64 duke@435: #else duke@435: #define __CPU__ i486 duke@435: #endif duke@435: duke@435: // save DLL module handle, used by GetModuleFileName duke@435: duke@435: HINSTANCE vm_lib_handle; duke@435: static int getLastErrorString(char *buf, size_t len); duke@435: duke@435: BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { duke@435: switch (reason) { duke@435: case DLL_PROCESS_ATTACH: duke@435: vm_lib_handle = hinst; duke@435: if(ForceTimeHighResolution) duke@435: timeBeginPeriod(1L); duke@435: break; duke@435: case DLL_PROCESS_DETACH: duke@435: if(ForceTimeHighResolution) duke@435: timeEndPeriod(1L); duke@435: #ifdef _WIN64 duke@435: if (topLevelVectoredExceptionHandler != NULL) { duke@435: RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler); duke@435: topLevelVectoredExceptionHandler = NULL; duke@435: } duke@435: #endif duke@435: break; duke@435: default: duke@435: break; duke@435: } duke@435: return true; duke@435: } duke@435: duke@435: static inline double fileTimeAsDouble(FILETIME* time) { duke@435: const double high = (double) ((unsigned int) ~0); duke@435: const double split = 10000000.0; duke@435: double result = (time->dwLowDateTime / split) + duke@435: time->dwHighDateTime * (high/split); duke@435: return result; duke@435: } duke@435: duke@435: // Implementation of os duke@435: duke@435: bool os::getenv(const char* name, char* buffer, int len) { duke@435: int result = GetEnvironmentVariable(name, buffer, len); duke@435: return result > 0 && result < len; duke@435: } duke@435: duke@435: duke@435: // No setuid programs under Windows. duke@435: bool os::have_special_privileges() { duke@435: return false; duke@435: } duke@435: duke@435: duke@435: // This method is a periodic task to check for misbehaving JNI applications duke@435: // under CheckJNI, we can add any periodic checks here. duke@435: // For Windows at the moment does nothing duke@435: void os::run_periodic_checks() { duke@435: return; duke@435: } duke@435: duke@435: #ifndef _WIN64 dcubed@1649: // previous UnhandledExceptionFilter, if there is one dcubed@1649: static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL; dcubed@1649: duke@435: LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); duke@435: #endif duke@435: void os::init_system_properties_values() { duke@435: /* sysclasspath, java_home, dll_dir */ duke@435: { duke@435: char *home_path; duke@435: char *dll_path; duke@435: char *pslash; duke@435: char *bin = "\\bin"; duke@435: char home_dir[MAX_PATH]; duke@435: duke@435: if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { duke@435: os::jvm_path(home_dir, sizeof(home_dir)); duke@435: // Found the full path to jvm[_g].dll. duke@435: // Now cut the path to /jre if we can. duke@435: *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ duke@435: pslash = strrchr(home_dir, '\\'); duke@435: if (pslash != NULL) { duke@435: *pslash = '\0'; /* get rid of \{client|server} */ duke@435: pslash = strrchr(home_dir, '\\'); duke@435: if (pslash != NULL) duke@435: *pslash = '\0'; /* get rid of \bin */ duke@435: } duke@435: } duke@435: duke@435: home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1); duke@435: if (home_path == NULL) duke@435: return; duke@435: strcpy(home_path, home_dir); duke@435: Arguments::set_java_home(home_path); duke@435: duke@435: dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1); duke@435: if (dll_path == NULL) duke@435: return; duke@435: strcpy(dll_path, home_dir); duke@435: strcat(dll_path, bin); duke@435: Arguments::set_dll_dir(dll_path); duke@435: duke@435: if (!set_boot_path('\\', ';')) duke@435: return; duke@435: } duke@435: duke@435: /* library_path */ duke@435: #define EXT_DIR "\\lib\\ext" duke@435: #define BIN_DIR "\\bin" duke@435: #define PACKAGE_DIR "\\Sun\\Java" duke@435: { duke@435: /* Win32 library search order (See the documentation for LoadLibrary): duke@435: * duke@435: * 1. The directory from which application is loaded. duke@435: * 2. The current directory duke@435: * 3. The system wide Java Extensions directory (Java only) duke@435: * 4. System directory (GetSystemDirectory) duke@435: * 5. Windows directory (GetWindowsDirectory) duke@435: * 6. The PATH environment variable duke@435: */ duke@435: duke@435: char *library_path; duke@435: char tmp[MAX_PATH]; duke@435: char *path_str = ::getenv("PATH"); duke@435: duke@435: library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + duke@435: sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10); duke@435: duke@435: library_path[0] = '\0'; duke@435: duke@435: GetModuleFileName(NULL, tmp, sizeof(tmp)); duke@435: *(strrchr(tmp, '\\')) = '\0'; duke@435: strcat(library_path, tmp); duke@435: duke@435: strcat(library_path, ";."); duke@435: duke@435: GetWindowsDirectory(tmp, sizeof(tmp)); duke@435: strcat(library_path, ";"); duke@435: strcat(library_path, tmp); duke@435: strcat(library_path, PACKAGE_DIR BIN_DIR); duke@435: duke@435: GetSystemDirectory(tmp, sizeof(tmp)); duke@435: strcat(library_path, ";"); duke@435: strcat(library_path, tmp); duke@435: duke@435: GetWindowsDirectory(tmp, sizeof(tmp)); duke@435: strcat(library_path, ";"); duke@435: strcat(library_path, tmp); duke@435: duke@435: if (path_str) { duke@435: strcat(library_path, ";"); duke@435: strcat(library_path, path_str); duke@435: } duke@435: duke@435: Arguments::set_library_path(library_path); duke@435: FREE_C_HEAP_ARRAY(char, library_path); duke@435: } duke@435: duke@435: /* Default extensions directory */ duke@435: { duke@435: char path[MAX_PATH]; duke@435: char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; duke@435: GetWindowsDirectory(path, MAX_PATH); duke@435: sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, duke@435: path, PACKAGE_DIR, EXT_DIR); duke@435: Arguments::set_ext_dirs(buf); duke@435: } duke@435: #undef EXT_DIR duke@435: #undef BIN_DIR duke@435: #undef PACKAGE_DIR duke@435: duke@435: /* Default endorsed standards directory. */ duke@435: { duke@435: #define ENDORSED_DIR "\\lib\\endorsed" duke@435: size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); duke@435: char * buf = NEW_C_HEAP_ARRAY(char, len); duke@435: sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); duke@435: Arguments::set_endorsed_dirs(buf); duke@435: #undef ENDORSED_DIR duke@435: } duke@435: duke@435: #ifndef _WIN64 dcubed@1649: // set our UnhandledExceptionFilter and save any previous one dcubed@1649: prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception); duke@435: #endif duke@435: duke@435: // Done duke@435: return; duke@435: } duke@435: duke@435: void os::breakpoint() { duke@435: DebugBreak(); duke@435: } duke@435: duke@435: // Invoked from the BREAKPOINT Macro duke@435: extern "C" void breakpoint() { duke@435: os::breakpoint(); duke@435: } duke@435: duke@435: // Returns an estimate of the current stack pointer. Result must be guaranteed duke@435: // to point into the calling threads stack, and be no lower than the current duke@435: // stack pointer. duke@435: duke@435: address os::current_stack_pointer() { duke@435: int dummy; duke@435: address sp = (address)&dummy; duke@435: return sp; duke@435: } duke@435: duke@435: // os::current_stack_base() duke@435: // duke@435: // Returns the base of the stack, which is the stack's duke@435: // starting address. This function must be called duke@435: // while running on the stack of the thread being queried. duke@435: duke@435: address os::current_stack_base() { duke@435: MEMORY_BASIC_INFORMATION minfo; duke@435: address stack_bottom; duke@435: size_t stack_size; duke@435: duke@435: VirtualQuery(&minfo, &minfo, sizeof(minfo)); duke@435: stack_bottom = (address)minfo.AllocationBase; duke@435: stack_size = minfo.RegionSize; duke@435: duke@435: // Add up the sizes of all the regions with the same duke@435: // AllocationBase. duke@435: while( 1 ) duke@435: { duke@435: VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); duke@435: if ( stack_bottom == (address)minfo.AllocationBase ) duke@435: stack_size += minfo.RegionSize; duke@435: else duke@435: break; duke@435: } duke@435: duke@435: #ifdef _M_IA64 duke@435: // IA64 has memory and register stacks duke@435: stack_size = stack_size / 2; duke@435: #endif duke@435: return stack_bottom + stack_size; duke@435: } duke@435: duke@435: size_t os::current_stack_size() { duke@435: size_t sz; duke@435: MEMORY_BASIC_INFORMATION minfo; duke@435: VirtualQuery(&minfo, &minfo, sizeof(minfo)); duke@435: sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; duke@435: return sz; duke@435: } duke@435: ysr@983: struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { ysr@983: const struct tm* time_struct_ptr = localtime(clock); ysr@983: if (time_struct_ptr != NULL) { ysr@983: *res = *time_struct_ptr; ysr@983: return res; ysr@983: } ysr@983: return NULL; ysr@983: } duke@435: duke@435: LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); duke@435: duke@435: // Thread start routine for all new Java threads duke@435: static unsigned __stdcall java_start(Thread* thread) { duke@435: // Try to randomize the cache line index of hot stack frames. duke@435: // This helps when threads of the same stack traces evict each other's duke@435: // cache lines. The threads can be either from the same JVM instance, or duke@435: // from different JVM instances. The benefit is especially true for duke@435: // processors with hyperthreading technology. duke@435: static int counter = 0; duke@435: int pid = os::current_process_id(); duke@435: _alloca(((pid ^ counter++) & 7) * 128); duke@435: duke@435: OSThread* osthr = thread->osthread(); duke@435: assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); duke@435: duke@435: if (UseNUMA) { duke@435: int lgrp_id = os::numa_get_group_id(); duke@435: if (lgrp_id != -1) { duke@435: thread->set_lgrp_id(lgrp_id); duke@435: } duke@435: } duke@435: duke@435: duke@435: if (UseVectoredExceptions) { duke@435: // If we are using vectored exception we don't need to set a SEH duke@435: thread->run(); duke@435: } duke@435: else { duke@435: // Install a win32 structured exception handler around every thread created duke@435: // by VM, so VM can genrate error dump when an exception occurred in non- duke@435: // Java thread (e.g. VM thread). duke@435: __try { duke@435: thread->run(); duke@435: } __except(topLevelExceptionFilter( duke@435: (_EXCEPTION_POINTERS*)_exception_info())) { duke@435: // Nothing to do. duke@435: } duke@435: } duke@435: duke@435: // One less thread is executing duke@435: // When the VMThread gets here, the main thread may have already exited duke@435: // which frees the CodeHeap containing the Atomic::add code duke@435: if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { duke@435: Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); duke@435: } duke@435: duke@435: return 0; duke@435: } duke@435: duke@435: static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { duke@435: // Allocate the OSThread object duke@435: OSThread* osthread = new OSThread(NULL, NULL); duke@435: if (osthread == NULL) return NULL; duke@435: duke@435: // Initialize support for Java interrupts duke@435: HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); duke@435: if (interrupt_event == NULL) { duke@435: delete osthread; duke@435: return NULL; duke@435: } duke@435: osthread->set_interrupt_event(interrupt_event); duke@435: duke@435: // Store info on the Win32 thread into the OSThread duke@435: osthread->set_thread_handle(thread_handle); duke@435: osthread->set_thread_id(thread_id); duke@435: duke@435: if (UseNUMA) { duke@435: int lgrp_id = os::numa_get_group_id(); duke@435: if (lgrp_id != -1) { duke@435: thread->set_lgrp_id(lgrp_id); duke@435: } duke@435: } duke@435: duke@435: // Initial thread state is INITIALIZED, not SUSPENDED duke@435: osthread->set_state(INITIALIZED); duke@435: duke@435: return osthread; duke@435: } duke@435: duke@435: duke@435: bool os::create_attached_thread(JavaThread* thread) { duke@435: #ifdef ASSERT duke@435: thread->verify_not_published(); duke@435: #endif duke@435: HANDLE thread_h; duke@435: if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), duke@435: &thread_h, THREAD_ALL_ACCESS, false, 0)) { duke@435: fatal("DuplicateHandle failed\n"); duke@435: } duke@435: OSThread* osthread = create_os_thread(thread, thread_h, duke@435: (int)current_thread_id()); duke@435: if (osthread == NULL) { duke@435: return false; duke@435: } duke@435: duke@435: // Initial thread state is RUNNABLE duke@435: osthread->set_state(RUNNABLE); duke@435: duke@435: thread->set_osthread(osthread); duke@435: return true; duke@435: } duke@435: duke@435: bool os::create_main_thread(JavaThread* thread) { duke@435: #ifdef ASSERT duke@435: thread->verify_not_published(); duke@435: #endif duke@435: if (_starting_thread == NULL) { duke@435: _starting_thread = create_os_thread(thread, main_thread, main_thread_id); duke@435: if (_starting_thread == NULL) { duke@435: return false; duke@435: } duke@435: } duke@435: duke@435: // The primordial thread is runnable from the start) duke@435: _starting_thread->set_state(RUNNABLE); duke@435: duke@435: thread->set_osthread(_starting_thread); duke@435: return true; duke@435: } duke@435: duke@435: // Allocate and initialize a new OSThread duke@435: bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { duke@435: unsigned thread_id; duke@435: duke@435: // Allocate the OSThread object duke@435: OSThread* osthread = new OSThread(NULL, NULL); duke@435: if (osthread == NULL) { duke@435: return false; duke@435: } duke@435: duke@435: // Initialize support for Java interrupts duke@435: HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); duke@435: if (interrupt_event == NULL) { duke@435: delete osthread; duke@435: return NULL; duke@435: } duke@435: osthread->set_interrupt_event(interrupt_event); duke@435: osthread->set_interrupted(false); duke@435: duke@435: thread->set_osthread(osthread); duke@435: duke@435: if (stack_size == 0) { duke@435: switch (thr_type) { duke@435: case os::java_thread: duke@435: // Java threads use ThreadStackSize which default value can be changed with the flag -Xss duke@435: if (JavaThread::stack_size_at_create() > 0) duke@435: stack_size = JavaThread::stack_size_at_create(); duke@435: break; duke@435: case os::compiler_thread: duke@435: if (CompilerThreadStackSize > 0) { duke@435: stack_size = (size_t)(CompilerThreadStackSize * K); duke@435: break; duke@435: } // else fall through: duke@435: // use VMThreadStackSize if CompilerThreadStackSize is not defined duke@435: case os::vm_thread: duke@435: case os::pgc_thread: duke@435: case os::cgc_thread: duke@435: case os::watcher_thread: duke@435: if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); duke@435: break; duke@435: } duke@435: } duke@435: duke@435: // Create the Win32 thread duke@435: // duke@435: // Contrary to what MSDN document says, "stack_size" in _beginthreadex() duke@435: // does not specify stack size. Instead, it specifies the size of duke@435: // initially committed space. The stack size is determined by duke@435: // PE header in the executable. If the committed "stack_size" is larger duke@435: // than default value in the PE header, the stack is rounded up to the duke@435: // nearest multiple of 1MB. For example if the launcher has default duke@435: // stack size of 320k, specifying any size less than 320k does not duke@435: // affect the actual stack size at all, it only affects the initial duke@435: // commitment. On the other hand, specifying 'stack_size' larger than duke@435: // default value may cause significant increase in memory usage, because duke@435: // not only the stack space will be rounded up to MB, but also the duke@435: // entire space is committed upfront. duke@435: // duke@435: // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' duke@435: // for CreateThread() that can treat 'stack_size' as stack size. However we duke@435: // are not supposed to call CreateThread() directly according to MSDN duke@435: // document because JVM uses C runtime library. The good news is that the duke@435: // flag appears to work with _beginthredex() as well. duke@435: duke@435: #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION duke@435: #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) duke@435: #endif duke@435: duke@435: HANDLE thread_handle = duke@435: (HANDLE)_beginthreadex(NULL, duke@435: (unsigned)stack_size, duke@435: (unsigned (__stdcall *)(void*)) java_start, duke@435: thread, duke@435: CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, duke@435: &thread_id); duke@435: if (thread_handle == NULL) { duke@435: // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again duke@435: // without the flag. duke@435: thread_handle = duke@435: (HANDLE)_beginthreadex(NULL, duke@435: (unsigned)stack_size, duke@435: (unsigned (__stdcall *)(void*)) java_start, duke@435: thread, duke@435: CREATE_SUSPENDED, duke@435: &thread_id); duke@435: } duke@435: if (thread_handle == NULL) { duke@435: // Need to clean up stuff we've allocated so far duke@435: CloseHandle(osthread->interrupt_event()); duke@435: thread->set_osthread(NULL); duke@435: delete osthread; duke@435: return NULL; duke@435: } duke@435: duke@435: Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); duke@435: duke@435: // Store info on the Win32 thread into the OSThread duke@435: osthread->set_thread_handle(thread_handle); duke@435: osthread->set_thread_id(thread_id); duke@435: duke@435: // Initial thread state is INITIALIZED, not SUSPENDED duke@435: osthread->set_state(INITIALIZED); duke@435: duke@435: // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain duke@435: return true; duke@435: } duke@435: duke@435: duke@435: // Free Win32 resources related to the OSThread duke@435: void os::free_thread(OSThread* osthread) { duke@435: assert(osthread != NULL, "osthread not set"); duke@435: CloseHandle(osthread->thread_handle()); duke@435: CloseHandle(osthread->interrupt_event()); duke@435: delete osthread; duke@435: } duke@435: duke@435: duke@435: static int has_performance_count = 0; duke@435: static jlong first_filetime; duke@435: static jlong initial_performance_count; duke@435: static jlong performance_frequency; duke@435: duke@435: duke@435: jlong as_long(LARGE_INTEGER x) { duke@435: jlong result = 0; // initialization to avoid warning duke@435: set_high(&result, x.HighPart); duke@435: set_low(&result, x.LowPart); duke@435: return result; duke@435: } duke@435: duke@435: duke@435: jlong os::elapsed_counter() { duke@435: LARGE_INTEGER count; duke@435: if (has_performance_count) { duke@435: QueryPerformanceCounter(&count); duke@435: return as_long(count) - initial_performance_count; duke@435: } else { duke@435: FILETIME wt; duke@435: GetSystemTimeAsFileTime(&wt); duke@435: return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); duke@435: } duke@435: } duke@435: duke@435: duke@435: jlong os::elapsed_frequency() { duke@435: if (has_performance_count) { duke@435: return performance_frequency; duke@435: } else { duke@435: // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. duke@435: return 10000000; duke@435: } duke@435: } duke@435: duke@435: duke@435: julong os::available_memory() { duke@435: return win32::available_memory(); duke@435: } duke@435: duke@435: julong os::win32::available_memory() { poonam@1312: // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect poonam@1312: // value if total memory is larger than 4GB poonam@1312: MEMORYSTATUSEX ms; poonam@1312: ms.dwLength = sizeof(ms); poonam@1312: GlobalMemoryStatusEx(&ms); poonam@1312: poonam@1312: return (julong)ms.ullAvailPhys; duke@435: } duke@435: duke@435: julong os::physical_memory() { duke@435: return win32::physical_memory(); duke@435: } duke@435: duke@435: julong os::allocatable_physical_memory(julong size) { phh@455: #ifdef _LP64 phh@455: return size; phh@455: #else phh@455: // Limit to 1400m because of the 2gb address space wall duke@435: return MIN2(size, (julong)1400*M); phh@455: #endif duke@435: } duke@435: duke@435: // VC6 lacks DWORD_PTR duke@435: #if _MSC_VER < 1300 duke@435: typedef UINT_PTR DWORD_PTR; duke@435: #endif duke@435: duke@435: int os::active_processor_count() { duke@435: DWORD_PTR lpProcessAffinityMask = 0; duke@435: DWORD_PTR lpSystemAffinityMask = 0; duke@435: int proc_count = processor_count(); duke@435: if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && duke@435: GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { duke@435: // Nof active processors is number of bits in process affinity mask duke@435: int bitcount = 0; duke@435: while (lpProcessAffinityMask != 0) { duke@435: lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); duke@435: bitcount++; duke@435: } duke@435: return bitcount; duke@435: } else { duke@435: return proc_count; duke@435: } duke@435: } duke@435: duke@435: bool os::distribute_processes(uint length, uint* distribution) { duke@435: // Not yet implemented. duke@435: return false; duke@435: } duke@435: duke@435: bool os::bind_to_processor(uint processor_id) { duke@435: // Not yet implemented. duke@435: return false; duke@435: } duke@435: duke@435: static void initialize_performance_counter() { duke@435: LARGE_INTEGER count; duke@435: if (QueryPerformanceFrequency(&count)) { duke@435: has_performance_count = 1; duke@435: performance_frequency = as_long(count); duke@435: QueryPerformanceCounter(&count); duke@435: initial_performance_count = as_long(count); duke@435: } else { duke@435: has_performance_count = 0; duke@435: FILETIME wt; duke@435: GetSystemTimeAsFileTime(&wt); duke@435: first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); duke@435: } duke@435: } duke@435: duke@435: duke@435: double os::elapsedTime() { duke@435: return (double) elapsed_counter() / (double) elapsed_frequency(); duke@435: } duke@435: duke@435: duke@435: // Windows format: duke@435: // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. duke@435: // Java format: duke@435: // Java standards require the number of milliseconds since 1/1/1970 duke@435: duke@435: // Constant offset - calculated using offset() duke@435: static jlong _offset = 116444736000000000; duke@435: // Fake time counter for reproducible results when debugging duke@435: static jlong fake_time = 0; duke@435: duke@435: #ifdef ASSERT duke@435: // Just to be safe, recalculate the offset in debug mode duke@435: static jlong _calculated_offset = 0; duke@435: static int _has_calculated_offset = 0; duke@435: duke@435: jlong offset() { duke@435: if (_has_calculated_offset) return _calculated_offset; duke@435: SYSTEMTIME java_origin; duke@435: java_origin.wYear = 1970; duke@435: java_origin.wMonth = 1; duke@435: java_origin.wDayOfWeek = 0; // ignored duke@435: java_origin.wDay = 1; duke@435: java_origin.wHour = 0; duke@435: java_origin.wMinute = 0; duke@435: java_origin.wSecond = 0; duke@435: java_origin.wMilliseconds = 0; duke@435: FILETIME jot; duke@435: if (!SystemTimeToFileTime(&java_origin, &jot)) { jcoomes@1845: fatal(err_msg("Error = %d\nWindows error", GetLastError())); duke@435: } duke@435: _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); duke@435: _has_calculated_offset = 1; duke@435: assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); duke@435: return _calculated_offset; duke@435: } duke@435: #else duke@435: jlong offset() { duke@435: return _offset; duke@435: } duke@435: #endif duke@435: duke@435: jlong windows_to_java_time(FILETIME wt) { duke@435: jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); duke@435: return (a - offset()) / 10000; duke@435: } duke@435: duke@435: FILETIME java_to_windows_time(jlong l) { duke@435: jlong a = (l * 10000) + offset(); duke@435: FILETIME result; duke@435: result.dwHighDateTime = high(a); duke@435: result.dwLowDateTime = low(a); duke@435: return result; duke@435: } duke@435: ysr@777: // For now, we say that Windows does not support vtime. I have no idea ysr@777: // whether it can actually be made to (DLD, 9/13/05). ysr@777: ysr@777: bool os::supports_vtime() { return false; } ysr@777: bool os::enable_vtime() { return false; } ysr@777: bool os::vtime_enabled() { return false; } ysr@777: double os::elapsedVTime() { ysr@777: // better than nothing, but not much ysr@777: return elapsedTime(); ysr@777: } ysr@777: duke@435: jlong os::javaTimeMillis() { duke@435: if (UseFakeTimers) { duke@435: return fake_time++; duke@435: } else { sbohne@496: FILETIME wt; sbohne@496: GetSystemTimeAsFileTime(&wt); sbohne@496: return windows_to_java_time(wt); duke@435: } duke@435: } duke@435: duke@435: #define NANOS_PER_SEC CONST64(1000000000) duke@435: #define NANOS_PER_MILLISEC 1000000 duke@435: jlong os::javaTimeNanos() { duke@435: if (!has_performance_count) { duke@435: return javaTimeMillis() * NANOS_PER_MILLISEC; // the best we can do. duke@435: } else { duke@435: LARGE_INTEGER current_count; duke@435: QueryPerformanceCounter(¤t_count); duke@435: double current = as_long(current_count); duke@435: double freq = performance_frequency; duke@435: jlong time = (jlong)((current/freq) * NANOS_PER_SEC); duke@435: return time; duke@435: } duke@435: } duke@435: duke@435: void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { duke@435: if (!has_performance_count) { duke@435: // javaTimeMillis() doesn't have much percision, duke@435: // but it is not going to wrap -- so all 64 bits duke@435: info_ptr->max_value = ALL_64_BITS; duke@435: duke@435: // this is a wall clock timer, so may skip duke@435: info_ptr->may_skip_backward = true; duke@435: info_ptr->may_skip_forward = true; duke@435: } else { duke@435: jlong freq = performance_frequency; duke@435: if (freq < NANOS_PER_SEC) { duke@435: // the performance counter is 64 bits and we will duke@435: // be multiplying it -- so no wrap in 64 bits duke@435: info_ptr->max_value = ALL_64_BITS; duke@435: } else if (freq > NANOS_PER_SEC) { duke@435: // use the max value the counter can reach to duke@435: // determine the max value which could be returned duke@435: julong max_counter = (julong)ALL_64_BITS; duke@435: info_ptr->max_value = (jlong)(max_counter / (freq / NANOS_PER_SEC)); duke@435: } else { duke@435: // the performance counter is 64 bits and we will duke@435: // be using it directly -- so no wrap in 64 bits duke@435: info_ptr->max_value = ALL_64_BITS; duke@435: } duke@435: duke@435: // using a counter, so no skipping duke@435: info_ptr->may_skip_backward = false; duke@435: info_ptr->may_skip_forward = false; duke@435: } duke@435: info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time duke@435: } duke@435: duke@435: char* os::local_time_string(char *buf, size_t buflen) { duke@435: SYSTEMTIME st; duke@435: GetLocalTime(&st); duke@435: jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", duke@435: st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); duke@435: return buf; duke@435: } duke@435: duke@435: bool os::getTimesSecs(double* process_real_time, duke@435: double* process_user_time, duke@435: double* process_system_time) { duke@435: HANDLE h_process = GetCurrentProcess(); duke@435: FILETIME create_time, exit_time, kernel_time, user_time; duke@435: BOOL result = GetProcessTimes(h_process, duke@435: &create_time, duke@435: &exit_time, duke@435: &kernel_time, duke@435: &user_time); duke@435: if (result != 0) { duke@435: FILETIME wt; duke@435: GetSystemTimeAsFileTime(&wt); duke@435: jlong rtc_millis = windows_to_java_time(wt); duke@435: jlong user_millis = windows_to_java_time(user_time); duke@435: jlong system_millis = windows_to_java_time(kernel_time); duke@435: *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); duke@435: *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); duke@435: *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); duke@435: return true; duke@435: } else { duke@435: return false; duke@435: } duke@435: } duke@435: duke@435: void os::shutdown() { duke@435: duke@435: // allow PerfMemory to attempt cleanup of any persistent resources duke@435: perfMemory_exit(); duke@435: duke@435: // flush buffered output, finish log files duke@435: ostream_abort(); duke@435: duke@435: // Check for abort hook duke@435: abort_hook_t abort_hook = Arguments::abort_hook(); duke@435: if (abort_hook != NULL) { duke@435: abort_hook(); duke@435: } duke@435: } duke@435: duke@435: void os::abort(bool dump_core) duke@435: { duke@435: os::shutdown(); duke@435: // no core dump on Windows duke@435: ::exit(1); duke@435: } duke@435: duke@435: // Die immediately, no exit hook, no abort hook, no cleanup. duke@435: void os::die() { duke@435: _exit(-1); duke@435: } duke@435: duke@435: // Directory routines copied from src/win32/native/java/io/dirent_md.c duke@435: // * dirent_md.c 1.15 00/02/02 duke@435: // duke@435: // The declarations for DIR and struct dirent are in jvm_win32.h. duke@435: duke@435: /* Caller must have already run dirname through JVM_NativePath, which removes duke@435: duplicate slashes and converts all instances of '/' into '\\'. */ duke@435: duke@435: DIR * duke@435: os::opendir(const char *dirname) duke@435: { duke@435: assert(dirname != NULL, "just checking"); // hotspot change duke@435: DIR *dirp = (DIR *)malloc(sizeof(DIR)); duke@435: DWORD fattr; // hotspot change duke@435: char alt_dirname[4] = { 0, 0, 0, 0 }; duke@435: duke@435: if (dirp == 0) { duke@435: errno = ENOMEM; duke@435: return 0; duke@435: } duke@435: duke@435: /* duke@435: * Win32 accepts "\" in its POSIX stat(), but refuses to treat it duke@435: * as a directory in FindFirstFile(). We detect this case here and duke@435: * prepend the current drive name. duke@435: */ duke@435: if (dirname[1] == '\0' && dirname[0] == '\\') { duke@435: alt_dirname[0] = _getdrive() + 'A' - 1; duke@435: alt_dirname[1] = ':'; duke@435: alt_dirname[2] = '\\'; duke@435: alt_dirname[3] = '\0'; duke@435: dirname = alt_dirname; duke@435: } duke@435: duke@435: dirp->path = (char *)malloc(strlen(dirname) + 5); duke@435: if (dirp->path == 0) { duke@435: free(dirp); duke@435: errno = ENOMEM; duke@435: return 0; duke@435: } duke@435: strcpy(dirp->path, dirname); duke@435: duke@435: fattr = GetFileAttributes(dirp->path); duke@435: if (fattr == 0xffffffff) { duke@435: free(dirp->path); duke@435: free(dirp); duke@435: errno = ENOENT; duke@435: return 0; duke@435: } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { duke@435: free(dirp->path); duke@435: free(dirp); duke@435: errno = ENOTDIR; duke@435: return 0; duke@435: } duke@435: duke@435: /* Append "*.*", or possibly "\\*.*", to path */ duke@435: if (dirp->path[1] == ':' duke@435: && (dirp->path[2] == '\0' duke@435: || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { duke@435: /* No '\\' needed for cases like "Z:" or "Z:\" */ duke@435: strcat(dirp->path, "*.*"); duke@435: } else { duke@435: strcat(dirp->path, "\\*.*"); duke@435: } duke@435: duke@435: dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); duke@435: if (dirp->handle == INVALID_HANDLE_VALUE) { duke@435: if (GetLastError() != ERROR_FILE_NOT_FOUND) { duke@435: free(dirp->path); duke@435: free(dirp); duke@435: errno = EACCES; duke@435: return 0; duke@435: } duke@435: } duke@435: return dirp; duke@435: } duke@435: duke@435: /* parameter dbuf unused on Windows */ duke@435: duke@435: struct dirent * duke@435: os::readdir(DIR *dirp, dirent *dbuf) duke@435: { duke@435: assert(dirp != NULL, "just checking"); // hotspot change duke@435: if (dirp->handle == INVALID_HANDLE_VALUE) { duke@435: return 0; duke@435: } duke@435: duke@435: strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); duke@435: duke@435: if (!FindNextFile(dirp->handle, &dirp->find_data)) { duke@435: if (GetLastError() == ERROR_INVALID_HANDLE) { duke@435: errno = EBADF; duke@435: return 0; duke@435: } duke@435: FindClose(dirp->handle); duke@435: dirp->handle = INVALID_HANDLE_VALUE; duke@435: } duke@435: duke@435: return &dirp->dirent; duke@435: } duke@435: duke@435: int duke@435: os::closedir(DIR *dirp) duke@435: { duke@435: assert(dirp != NULL, "just checking"); // hotspot change duke@435: if (dirp->handle != INVALID_HANDLE_VALUE) { duke@435: if (!FindClose(dirp->handle)) { duke@435: errno = EBADF; duke@435: return -1; duke@435: } duke@435: dirp->handle = INVALID_HANDLE_VALUE; duke@435: } duke@435: free(dirp->path); duke@435: free(dirp); duke@435: return 0; duke@435: } duke@435: duke@435: const char* os::dll_file_extension() { return ".dll"; } duke@435: coleenp@1788: const char* os::get_temp_directory() { coleenp@1788: const char *prop = Arguments::get_property("java.io.tmpdir"); coleenp@1788: if (prop != 0) return prop; coleenp@1788: static char path_buf[MAX_PATH]; coleenp@1788: if (GetTempPath(MAX_PATH, path_buf)>0) coleenp@1788: return path_buf; coleenp@1788: else{ coleenp@1788: path_buf[0]='\0'; coleenp@1788: return path_buf; coleenp@1788: } duke@435: } duke@435: phh@1126: static bool file_exists(const char* filename) { phh@1126: if (filename == NULL || strlen(filename) == 0) { phh@1126: return false; phh@1126: } phh@1126: return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES; phh@1126: } phh@1126: phh@1126: void os::dll_build_name(char *buffer, size_t buflen, phh@1126: const char* pname, const char* fname) { phh@1126: // Copied from libhpi phh@1126: const size_t pnamelen = pname ? strlen(pname) : 0; phh@1126: const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; phh@1126: phh@1126: // Quietly truncates on buffer overflow. Should be an error. phh@1126: if (pnamelen + strlen(fname) + 10 > buflen) { phh@1126: *buffer = '\0'; phh@1126: return; phh@1126: } phh@1126: phh@1126: if (pnamelen == 0) { phh@1126: jio_snprintf(buffer, buflen, "%s.dll", fname); phh@1126: } else if (c == ':' || c == '\\') { phh@1126: jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname); phh@1126: } else if (strchr(pname, *os::path_separator()) != NULL) { phh@1126: int n; phh@1126: char** pelements = split_path(pname, &n); phh@1126: for (int i = 0 ; i < n ; i++) { phh@1126: char* path = pelements[i]; phh@1126: // Really shouldn't be NULL, but check can't hurt phh@1126: size_t plen = (path == NULL) ? 0 : strlen(path); phh@1126: if (plen == 0) { phh@1126: continue; // skip the empty path values phh@1126: } phh@1126: const char lastchar = path[plen - 1]; phh@1126: if (lastchar == ':' || lastchar == '\\') { phh@1126: jio_snprintf(buffer, buflen, "%s%s.dll", path, fname); phh@1126: } else { phh@1126: jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname); phh@1126: } phh@1126: if (file_exists(buffer)) { phh@1126: break; phh@1126: } kamg@677: } phh@1126: // release the storage phh@1126: for (int i = 0 ; i < n ; i++) { phh@1126: if (pelements[i] != NULL) { phh@1126: FREE_C_HEAP_ARRAY(char, pelements[i]); phh@1126: } kamg@677: } phh@1126: if (pelements != NULL) { phh@1126: FREE_C_HEAP_ARRAY(char*, pelements); phh@1126: } phh@1126: } else { phh@1126: jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname); phh@1126: } kamg@677: } kamg@677: duke@435: // Needs to be in os specific directory because windows requires another duke@435: // header file duke@435: const char* os::get_current_directory(char *buf, int buflen) { duke@435: return _getcwd(buf, buflen); duke@435: } duke@435: duke@435: //----------------------------------------------------------- duke@435: // Helper functions for fatal error handler duke@435: duke@435: // The following library functions are resolved dynamically at runtime: duke@435: duke@435: // PSAPI functions, for Windows NT, 2000, XP duke@435: duke@435: // psapi.h doesn't come with Visual Studio 6; it can be downloaded as Platform duke@435: // SDK from Microsoft. Here are the definitions copied from psapi.h duke@435: typedef struct _MODULEINFO { duke@435: LPVOID lpBaseOfDll; duke@435: DWORD SizeOfImage; duke@435: LPVOID EntryPoint; duke@435: } MODULEINFO, *LPMODULEINFO; duke@435: duke@435: static BOOL (WINAPI *_EnumProcessModules) ( HANDLE, HMODULE *, DWORD, LPDWORD ); duke@435: static DWORD (WINAPI *_GetModuleFileNameEx) ( HANDLE, HMODULE, LPTSTR, DWORD ); duke@435: static BOOL (WINAPI *_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD ); duke@435: duke@435: // ToolHelp Functions, for Windows 95, 98 and ME duke@435: duke@435: static HANDLE(WINAPI *_CreateToolhelp32Snapshot)(DWORD,DWORD) ; duke@435: static BOOL (WINAPI *_Module32First) (HANDLE,LPMODULEENTRY32) ; duke@435: static BOOL (WINAPI *_Module32Next) (HANDLE,LPMODULEENTRY32) ; duke@435: duke@435: bool _has_psapi; duke@435: bool _psapi_init = false; duke@435: bool _has_toolhelp; duke@435: duke@435: static bool _init_psapi() { duke@435: HINSTANCE psapi = LoadLibrary( "PSAPI.DLL" ) ; duke@435: if( psapi == NULL ) return false ; duke@435: duke@435: _EnumProcessModules = CAST_TO_FN_PTR( duke@435: BOOL(WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD), duke@435: GetProcAddress(psapi, "EnumProcessModules")) ; duke@435: _GetModuleFileNameEx = CAST_TO_FN_PTR( duke@435: DWORD (WINAPI *)(HANDLE, HMODULE, LPTSTR, DWORD), duke@435: GetProcAddress(psapi, "GetModuleFileNameExA")); duke@435: _GetModuleInformation = CAST_TO_FN_PTR( duke@435: BOOL (WINAPI *)(HANDLE, HMODULE, LPMODULEINFO, DWORD), duke@435: GetProcAddress(psapi, "GetModuleInformation")); duke@435: duke@435: _has_psapi = (_EnumProcessModules && _GetModuleFileNameEx && _GetModuleInformation); duke@435: _psapi_init = true; duke@435: return _has_psapi; duke@435: } duke@435: duke@435: static bool _init_toolhelp() { duke@435: HINSTANCE kernel32 = LoadLibrary("Kernel32.DLL") ; duke@435: if (kernel32 == NULL) return false ; duke@435: duke@435: _CreateToolhelp32Snapshot = CAST_TO_FN_PTR( duke@435: HANDLE(WINAPI *)(DWORD,DWORD), duke@435: GetProcAddress(kernel32, "CreateToolhelp32Snapshot")); duke@435: _Module32First = CAST_TO_FN_PTR( duke@435: BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), duke@435: GetProcAddress(kernel32, "Module32First" )); duke@435: _Module32Next = CAST_TO_FN_PTR( duke@435: BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), duke@435: GetProcAddress(kernel32, "Module32Next" )); duke@435: duke@435: _has_toolhelp = (_CreateToolhelp32Snapshot && _Module32First && _Module32Next); duke@435: return _has_toolhelp; duke@435: } duke@435: duke@435: #ifdef _WIN64 duke@435: // Helper routine which returns true if address in duke@435: // within the NTDLL address space. duke@435: // duke@435: static bool _addr_in_ntdll( address addr ) duke@435: { duke@435: HMODULE hmod; duke@435: MODULEINFO minfo; duke@435: duke@435: hmod = GetModuleHandle("NTDLL.DLL"); duke@435: if ( hmod == NULL ) return false; duke@435: if ( !_GetModuleInformation( GetCurrentProcess(), hmod, duke@435: &minfo, sizeof(MODULEINFO)) ) duke@435: return false; duke@435: duke@435: if ( (addr >= minfo.lpBaseOfDll) && duke@435: (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) duke@435: return true; duke@435: else duke@435: return false; duke@435: } duke@435: #endif duke@435: duke@435: duke@435: // Enumerate all modules for a given process ID duke@435: // duke@435: // Notice that Windows 95/98/Me and Windows NT/2000/XP have duke@435: // different API for doing this. We use PSAPI.DLL on NT based duke@435: // Windows and ToolHelp on 95/98/Me. duke@435: duke@435: // Callback function that is called by enumerate_modules() on duke@435: // every DLL module. duke@435: // Input parameters: duke@435: // int pid, duke@435: // char* module_file_name, duke@435: // address module_base_addr, duke@435: // unsigned module_size, duke@435: // void* param duke@435: typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); duke@435: duke@435: // enumerate_modules for Windows NT, using PSAPI duke@435: static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) duke@435: { duke@435: HANDLE hProcess ; duke@435: duke@435: # define MAX_NUM_MODULES 128 duke@435: HMODULE modules[MAX_NUM_MODULES]; duke@435: static char filename[ MAX_PATH ]; duke@435: int result = 0; duke@435: duke@435: if (!_has_psapi && (_psapi_init || !_init_psapi())) return 0; duke@435: duke@435: hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, duke@435: FALSE, pid ) ; duke@435: if (hProcess == NULL) return 0; duke@435: duke@435: DWORD size_needed; duke@435: if (!_EnumProcessModules(hProcess, modules, duke@435: sizeof(modules), &size_needed)) { duke@435: CloseHandle( hProcess ); duke@435: return 0; duke@435: } duke@435: duke@435: // number of modules that are currently loaded duke@435: int num_modules = size_needed / sizeof(HMODULE); duke@435: duke@435: for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { duke@435: // Get Full pathname: duke@435: if(!_GetModuleFileNameEx(hProcess, modules[i], duke@435: filename, sizeof(filename))) { duke@435: filename[0] = '\0'; duke@435: } duke@435: duke@435: MODULEINFO modinfo; duke@435: if (!_GetModuleInformation(hProcess, modules[i], duke@435: &modinfo, sizeof(modinfo))) { duke@435: modinfo.lpBaseOfDll = NULL; duke@435: modinfo.SizeOfImage = 0; duke@435: } duke@435: duke@435: // Invoke callback function duke@435: result = func(pid, filename, (address)modinfo.lpBaseOfDll, duke@435: modinfo.SizeOfImage, param); duke@435: if (result) break; duke@435: } duke@435: duke@435: CloseHandle( hProcess ) ; duke@435: return result; duke@435: } duke@435: duke@435: duke@435: // enumerate_modules for Windows 95/98/ME, using TOOLHELP duke@435: static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) duke@435: { duke@435: HANDLE hSnapShot ; duke@435: static MODULEENTRY32 modentry ; duke@435: int result = 0; duke@435: duke@435: if (!_has_toolhelp) return 0; duke@435: duke@435: // Get a handle to a Toolhelp snapshot of the system duke@435: hSnapShot = _CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; duke@435: if( hSnapShot == INVALID_HANDLE_VALUE ) { duke@435: return FALSE ; duke@435: } duke@435: duke@435: // iterate through all modules duke@435: modentry.dwSize = sizeof(MODULEENTRY32) ; duke@435: bool not_done = _Module32First( hSnapShot, &modentry ) != 0; duke@435: duke@435: while( not_done ) { duke@435: // invoke the callback duke@435: result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, duke@435: modentry.modBaseSize, param); duke@435: if (result) break; duke@435: duke@435: modentry.dwSize = sizeof(MODULEENTRY32) ; duke@435: not_done = _Module32Next( hSnapShot, &modentry ) != 0; duke@435: } duke@435: duke@435: CloseHandle(hSnapShot); duke@435: return result; duke@435: } duke@435: duke@435: int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) duke@435: { duke@435: // Get current process ID if caller doesn't provide it. duke@435: if (!pid) pid = os::current_process_id(); duke@435: duke@435: if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); duke@435: else return _enumerate_modules_windows(pid, func, param); duke@435: } duke@435: duke@435: struct _modinfo { duke@435: address addr; duke@435: char* full_path; // point to a char buffer duke@435: int buflen; // size of the buffer duke@435: address base_addr; duke@435: }; duke@435: duke@435: static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, duke@435: unsigned size, void * param) { duke@435: struct _modinfo *pmod = (struct _modinfo *)param; duke@435: if (!pmod) return -1; duke@435: duke@435: if (base_addr <= pmod->addr && duke@435: base_addr+size > pmod->addr) { duke@435: // if a buffer is provided, copy path name to the buffer duke@435: if (pmod->full_path) { duke@435: jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); duke@435: } duke@435: pmod->base_addr = base_addr; duke@435: return 1; duke@435: } duke@435: return 0; duke@435: } duke@435: duke@435: bool os::dll_address_to_library_name(address addr, char* buf, duke@435: int buflen, int* offset) { duke@435: // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always duke@435: // return the full path to the DLL file, sometimes it returns path duke@435: // to the corresponding PDB file (debug info); sometimes it only duke@435: // returns partial path, which makes life painful. duke@435: duke@435: struct _modinfo mi; duke@435: mi.addr = addr; duke@435: mi.full_path = buf; duke@435: mi.buflen = buflen; duke@435: int pid = os::current_process_id(); duke@435: if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { duke@435: // buf already contains path name duke@435: if (offset) *offset = addr - mi.base_addr; duke@435: return true; duke@435: } else { duke@435: if (buf) buf[0] = '\0'; duke@435: if (offset) *offset = -1; duke@435: return false; duke@435: } duke@435: } duke@435: duke@435: bool os::dll_address_to_function_name(address addr, char *buf, duke@435: int buflen, int *offset) { duke@435: // Unimplemented on Windows - in order to use SymGetSymFromAddr(), duke@435: // we need to initialize imagehlp/dbghelp, then load symbol table duke@435: // for every module. That's too much work to do after a fatal error. duke@435: // For an example on how to implement this function, see 1.4.2. duke@435: if (offset) *offset = -1; duke@435: if (buf) buf[0] = '\0'; duke@435: return false; duke@435: } duke@435: kamg@677: void* os::dll_lookup(void* handle, const char* name) { kamg@677: return GetProcAddress((HMODULE)handle, name); kamg@677: } kamg@677: duke@435: // save the start and end address of jvm.dll into param[0] and param[1] duke@435: static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, duke@435: unsigned size, void * param) { duke@435: if (!param) return -1; duke@435: duke@435: if (base_addr <= (address)_locate_jvm_dll && duke@435: base_addr+size > (address)_locate_jvm_dll) { duke@435: ((address*)param)[0] = base_addr; duke@435: ((address*)param)[1] = base_addr + size; duke@435: return 1; duke@435: } duke@435: return 0; duke@435: } duke@435: duke@435: address vm_lib_location[2]; // start and end address of jvm.dll duke@435: duke@435: // check if addr is inside jvm.dll duke@435: bool os::address_is_in_vm(address addr) { duke@435: if (!vm_lib_location[0] || !vm_lib_location[1]) { duke@435: int pid = os::current_process_id(); duke@435: if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { duke@435: assert(false, "Can't find jvm module."); duke@435: return false; duke@435: } duke@435: } duke@435: duke@435: return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); duke@435: } duke@435: duke@435: // print module info; param is outputStream* duke@435: static int _print_module(int pid, char* fname, address base, duke@435: unsigned size, void* param) { duke@435: if (!param) return -1; duke@435: duke@435: outputStream* st = (outputStream*)param; duke@435: duke@435: address end_addr = base + size; duke@435: st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); duke@435: return 0; duke@435: } duke@435: duke@435: // Loads .dll/.so and duke@435: // in case of error it checks if .dll/.so was built for the duke@435: // same architecture as Hotspot is running on duke@435: void * os::dll_load(const char *name, char *ebuf, int ebuflen) duke@435: { duke@435: void * result = LoadLibrary(name); duke@435: if (result != NULL) duke@435: { duke@435: return result; duke@435: } duke@435: duke@435: long errcode = GetLastError(); duke@435: if (errcode == ERROR_MOD_NOT_FOUND) { duke@435: strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); duke@435: ebuf[ebuflen-1]='\0'; duke@435: return NULL; duke@435: } duke@435: duke@435: // Parsing dll below duke@435: // If we can read dll-info and find that dll was built duke@435: // for an architecture other than Hotspot is running in duke@435: // - then print to buffer "DLL was built for a different architecture" duke@435: // else call getLastErrorString to obtain system error message duke@435: duke@435: // Read system error message into ebuf duke@435: // It may or may not be overwritten below (in the for loop and just above) duke@435: getLastErrorString(ebuf, (size_t) ebuflen); duke@435: ebuf[ebuflen-1]='\0'; duke@435: int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); duke@435: if (file_descriptor<0) duke@435: { duke@435: return NULL; duke@435: } duke@435: duke@435: uint32_t signature_offset; duke@435: uint16_t lib_arch=0; duke@435: bool failed_to_get_lib_arch= duke@435: ( duke@435: //Go to position 3c in the dll duke@435: (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) duke@435: || duke@435: // Read loacation of signature duke@435: (sizeof(signature_offset)!= duke@435: (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) duke@435: || duke@435: //Go to COFF File Header in dll duke@435: //that is located after"signature" (4 bytes long) duke@435: (os::seek_to_file_offset(file_descriptor, duke@435: signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) duke@435: || duke@435: //Read field that contains code of architecture duke@435: // that dll was build for duke@435: (sizeof(lib_arch)!= duke@435: (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) duke@435: ); duke@435: duke@435: ::close(file_descriptor); duke@435: if (failed_to_get_lib_arch) duke@435: { duke@435: // file i/o error - report getLastErrorString(...) msg duke@435: return NULL; duke@435: } duke@435: duke@435: typedef struct duke@435: { duke@435: uint16_t arch_code; duke@435: char* arch_name; duke@435: } arch_t; duke@435: duke@435: static const arch_t arch_array[]={ duke@435: {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, duke@435: {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, duke@435: {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} duke@435: }; duke@435: #if (defined _M_IA64) duke@435: static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; duke@435: #elif (defined _M_AMD64) duke@435: static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; duke@435: #elif (defined _M_IX86) duke@435: static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; duke@435: #else duke@435: #error Method os::dll_load requires that one of following \ duke@435: is defined :_M_IA64,_M_AMD64 or _M_IX86 duke@435: #endif duke@435: duke@435: duke@435: // Obtain a string for printf operation duke@435: // lib_arch_str shall contain string what platform this .dll was built for duke@435: // running_arch_str shall string contain what platform Hotspot was built for duke@435: char *running_arch_str=NULL,*lib_arch_str=NULL; duke@435: for (unsigned int i=0;iprint_cr("Dynamic libraries:"); duke@435: enumerate_modules(pid, _print_module, (void *)st); duke@435: } duke@435: xlu@708: // function pointer to Windows API "GetNativeSystemInfo". xlu@708: typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO); xlu@708: static GetNativeSystemInfo_func_type _GetNativeSystemInfo; xlu@708: duke@435: void os::print_os_info(outputStream* st) { xlu@708: st->print("OS:"); xlu@708: xlu@708: OSVERSIONINFOEX osvi; xlu@708: ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); xlu@708: osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); xlu@708: xlu@708: if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { xlu@708: st->print_cr("N/A"); xlu@708: return; xlu@708: } xlu@708: xlu@708: int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; xlu@708: if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { xlu@708: switch (os_vers) { xlu@708: case 3051: st->print(" Windows NT 3.51"); break; xlu@708: case 4000: st->print(" Windows NT 4.0"); break; xlu@708: case 5000: st->print(" Windows 2000"); break; xlu@708: case 5001: st->print(" Windows XP"); break; xlu@708: case 5002: asaha@1397: case 6000: asaha@1397: case 6001: { xlu@708: // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could xlu@708: // find out whether we are running on 64 bit processor or not. xlu@708: SYSTEM_INFO si; xlu@708: ZeroMemory(&si, sizeof(SYSTEM_INFO)); xlu@708: // Check to see if _GetNativeSystemInfo has been initialized. xlu@708: if (_GetNativeSystemInfo == NULL) { xlu@708: HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll")); xlu@708: _GetNativeSystemInfo = xlu@708: CAST_TO_FN_PTR(GetNativeSystemInfo_func_type, xlu@708: GetProcAddress(hKernel32, xlu@708: "GetNativeSystemInfo")); xlu@708: if (_GetNativeSystemInfo == NULL) xlu@708: GetSystemInfo(&si); xlu@708: } else { xlu@708: _GetNativeSystemInfo(&si); xlu@708: } xlu@708: if (os_vers == 5002) { xlu@708: if (osvi.wProductType == VER_NT_WORKSTATION && xlu@708: si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) xlu@708: st->print(" Windows XP x64 Edition"); xlu@708: else xlu@708: st->print(" Windows Server 2003 family"); asaha@1397: } else if (os_vers == 6000) { xlu@708: if (osvi.wProductType == VER_NT_WORKSTATION) xlu@708: st->print(" Windows Vista"); xlu@708: else xlu@708: st->print(" Windows Server 2008"); xlu@708: if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) xlu@708: st->print(" , 64 bit"); asaha@1397: } else if (os_vers == 6001) { asaha@1397: if (osvi.wProductType == VER_NT_WORKSTATION) { asaha@1397: st->print(" Windows 7"); asaha@1397: } else { asaha@1397: // Unrecognized windows, print out its major and minor versions asaha@1397: st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); asaha@1397: } asaha@1397: if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) asaha@1397: st->print(" , 64 bit"); asaha@1397: } else { // future os asaha@1397: // Unrecognized windows, print out its major and minor versions asaha@1397: st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); asaha@1397: if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) asaha@1397: st->print(" , 64 bit"); xlu@708: } xlu@708: break; xlu@708: } xlu@708: default: // future windows, print out its major and minor versions xlu@708: st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); xlu@708: } xlu@708: } else { xlu@708: switch (os_vers) { xlu@708: case 4000: st->print(" Windows 95"); break; xlu@708: case 4010: st->print(" Windows 98"); break; xlu@708: case 4090: st->print(" Windows Me"); break; xlu@708: default: // future windows, print out its major and minor versions xlu@708: st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); xlu@708: } xlu@708: } xlu@708: st->print(" Build %d", osvi.dwBuildNumber); xlu@708: st->print(" %s", osvi.szCSDVersion); // service pack xlu@708: st->cr(); duke@435: } duke@435: duke@435: void os::print_memory_info(outputStream* st) { duke@435: st->print("Memory:"); duke@435: st->print(" %dk page", os::vm_page_size()>>10); duke@435: poonam@1312: // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect poonam@1312: // value if total memory is larger than 4GB poonam@1312: MEMORYSTATUSEX ms; poonam@1312: ms.dwLength = sizeof(ms); poonam@1312: GlobalMemoryStatusEx(&ms); duke@435: duke@435: st->print(", physical %uk", os::physical_memory() >> 10); duke@435: st->print("(%uk free)", os::available_memory() >> 10); duke@435: poonam@1312: st->print(", swap %uk", ms.ullTotalPageFile >> 10); poonam@1312: st->print("(%uk free)", ms.ullAvailPageFile >> 10); duke@435: st->cr(); duke@435: } duke@435: duke@435: void os::print_siginfo(outputStream *st, void *siginfo) { duke@435: EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; duke@435: st->print("siginfo:"); duke@435: st->print(" ExceptionCode=0x%x", er->ExceptionCode); duke@435: duke@435: if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && duke@435: er->NumberParameters >= 2) { duke@435: switch (er->ExceptionInformation[0]) { duke@435: case 0: st->print(", reading address"); break; duke@435: case 1: st->print(", writing address"); break; duke@435: default: st->print(", ExceptionInformation=" INTPTR_FORMAT, duke@435: er->ExceptionInformation[0]); duke@435: } duke@435: st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); duke@435: } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && duke@435: er->NumberParameters >= 2 && UseSharedSpaces) { duke@435: FileMapInfo* mapinfo = FileMapInfo::current_info(); duke@435: if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { duke@435: st->print("\n\nError accessing class data sharing archive." \ duke@435: " Mapped file inaccessible during execution, " \ duke@435: " possible disk/network problem."); duke@435: } duke@435: } else { duke@435: int num = er->NumberParameters; duke@435: if (num > 0) { duke@435: st->print(", ExceptionInformation="); duke@435: for (int i = 0; i < num; i++) { duke@435: st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); duke@435: } duke@435: } duke@435: } duke@435: st->cr(); duke@435: } duke@435: duke@435: void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { duke@435: // do nothing duke@435: } duke@435: duke@435: static char saved_jvm_path[MAX_PATH] = {0}; duke@435: duke@435: // Find the full path to the current module, jvm.dll or jvm_g.dll duke@435: void os::jvm_path(char *buf, jint buflen) { duke@435: // Error checking. duke@435: if (buflen < MAX_PATH) { duke@435: assert(false, "must use a large-enough buffer"); duke@435: buf[0] = '\0'; duke@435: return; duke@435: } duke@435: // Lazy resolve the path to current module. duke@435: if (saved_jvm_path[0] != 0) { duke@435: strcpy(buf, saved_jvm_path); duke@435: return; duke@435: } duke@435: duke@435: GetModuleFileName(vm_lib_handle, buf, buflen); duke@435: strcpy(saved_jvm_path, buf); duke@435: } duke@435: duke@435: duke@435: void os::print_jni_name_prefix_on(outputStream* st, int args_size) { duke@435: #ifndef _WIN64 duke@435: st->print("_"); duke@435: #endif duke@435: } duke@435: duke@435: duke@435: void os::print_jni_name_suffix_on(outputStream* st, int args_size) { duke@435: #ifndef _WIN64 duke@435: st->print("@%d", args_size * sizeof(int)); duke@435: #endif duke@435: } duke@435: duke@435: // sun.misc.Signal duke@435: // NOTE that this is a workaround for an apparent kernel bug where if duke@435: // a signal handler for SIGBREAK is installed then that signal handler duke@435: // takes priority over the console control handler for CTRL_CLOSE_EVENT. duke@435: // See bug 4416763. duke@435: static void (*sigbreakHandler)(int) = NULL; duke@435: duke@435: static void UserHandler(int sig, void *siginfo, void *context) { duke@435: os::signal_notify(sig); duke@435: // We need to reinstate the signal handler each time... duke@435: os::signal(sig, (void*)UserHandler); duke@435: } duke@435: duke@435: void* os::user_handler() { duke@435: return (void*) UserHandler; duke@435: } duke@435: duke@435: void* os::signal(int signal_number, void* handler) { duke@435: if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { duke@435: void (*oldHandler)(int) = sigbreakHandler; duke@435: sigbreakHandler = (void (*)(int)) handler; duke@435: return (void*) oldHandler; duke@435: } else { duke@435: return (void*)::signal(signal_number, (void (*)(int))handler); duke@435: } duke@435: } duke@435: duke@435: void os::signal_raise(int signal_number) { duke@435: raise(signal_number); duke@435: } duke@435: duke@435: // The Win32 C runtime library maps all console control events other than ^C duke@435: // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, duke@435: // logoff, and shutdown events. We therefore install our own console handler duke@435: // that raises SIGTERM for the latter cases. duke@435: // duke@435: static BOOL WINAPI consoleHandler(DWORD event) { duke@435: switch(event) { duke@435: case CTRL_C_EVENT: duke@435: if (is_error_reported()) { duke@435: // Ctrl-C is pressed during error reporting, likely because the error duke@435: // handler fails to abort. Let VM die immediately. duke@435: os::die(); duke@435: } duke@435: duke@435: os::signal_raise(SIGINT); duke@435: return TRUE; duke@435: break; duke@435: case CTRL_BREAK_EVENT: duke@435: if (sigbreakHandler != NULL) { duke@435: (*sigbreakHandler)(SIGBREAK); duke@435: } duke@435: return TRUE; duke@435: break; duke@435: case CTRL_CLOSE_EVENT: duke@435: case CTRL_LOGOFF_EVENT: duke@435: case CTRL_SHUTDOWN_EVENT: duke@435: os::signal_raise(SIGTERM); duke@435: return TRUE; duke@435: break; duke@435: default: duke@435: break; duke@435: } duke@435: return FALSE; duke@435: } duke@435: duke@435: /* duke@435: * The following code is moved from os.cpp for making this duke@435: * code platform specific, which it is by its very nature. duke@435: */ duke@435: duke@435: // Return maximum OS signal used + 1 for internal use only duke@435: // Used as exit signal for signal_thread duke@435: int os::sigexitnum_pd(){ duke@435: return NSIG; duke@435: } duke@435: duke@435: // a counter for each possible signal value, including signal_thread exit signal duke@435: static volatile jint pending_signals[NSIG+1] = { 0 }; duke@435: static HANDLE sig_sem; duke@435: duke@435: void os::signal_init_pd() { duke@435: // Initialize signal structures duke@435: memset((void*)pending_signals, 0, sizeof(pending_signals)); duke@435: duke@435: sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); duke@435: duke@435: // Programs embedding the VM do not want it to attempt to receive duke@435: // events like CTRL_LOGOFF_EVENT, which are used to implement the duke@435: // shutdown hooks mechanism introduced in 1.3. For example, when duke@435: // the VM is run as part of a Windows NT service (i.e., a servlet duke@435: // engine in a web server), the correct behavior is for any console duke@435: // control handler to return FALSE, not TRUE, because the OS's duke@435: // "final" handler for such events allows the process to continue if duke@435: // it is a service (while terminating it if it is not a service). duke@435: // To make this behavior uniform and the mechanism simpler, we duke@435: // completely disable the VM's usage of these console events if -Xrs duke@435: // (=ReduceSignalUsage) is specified. This means, for example, that duke@435: // the CTRL-BREAK thread dump mechanism is also disabled in this duke@435: // case. See bugs 4323062, 4345157, and related bugs. duke@435: duke@435: if (!ReduceSignalUsage) { duke@435: // Add a CTRL-C handler duke@435: SetConsoleCtrlHandler(consoleHandler, TRUE); duke@435: } duke@435: } duke@435: duke@435: void os::signal_notify(int signal_number) { duke@435: BOOL ret; duke@435: duke@435: Atomic::inc(&pending_signals[signal_number]); duke@435: ret = ::ReleaseSemaphore(sig_sem, 1, NULL); duke@435: assert(ret != 0, "ReleaseSemaphore() failed"); duke@435: } duke@435: duke@435: static int check_pending_signals(bool wait_for_signal) { duke@435: DWORD ret; duke@435: while (true) { duke@435: for (int i = 0; i < NSIG + 1; i++) { duke@435: jint n = pending_signals[i]; duke@435: if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { duke@435: return i; duke@435: } duke@435: } duke@435: if (!wait_for_signal) { duke@435: return -1; duke@435: } duke@435: duke@435: JavaThread *thread = JavaThread::current(); duke@435: duke@435: ThreadBlockInVM tbivm(thread); duke@435: duke@435: bool threadIsSuspended; duke@435: do { duke@435: thread->set_suspend_equivalent(); duke@435: // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() duke@435: ret = ::WaitForSingleObject(sig_sem, INFINITE); duke@435: assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); duke@435: duke@435: // were we externally suspended while we were waiting? duke@435: threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); duke@435: if (threadIsSuspended) { duke@435: // duke@435: // The semaphore has been incremented, but while we were waiting duke@435: // another thread suspended us. We don't want to continue running duke@435: // while suspended because that would surprise the thread that duke@435: // suspended us. duke@435: // duke@435: ret = ::ReleaseSemaphore(sig_sem, 1, NULL); duke@435: assert(ret != 0, "ReleaseSemaphore() failed"); duke@435: duke@435: thread->java_suspend_self(); duke@435: } duke@435: } while (threadIsSuspended); duke@435: } duke@435: } duke@435: duke@435: int os::signal_lookup() { duke@435: return check_pending_signals(false); duke@435: } duke@435: duke@435: int os::signal_wait() { duke@435: return check_pending_signals(true); duke@435: } duke@435: duke@435: // Implicit OS exception handling duke@435: duke@435: LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { duke@435: JavaThread* thread = JavaThread::current(); duke@435: // Save pc in thread duke@435: #ifdef _M_IA64 duke@435: thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); duke@435: // Set pc to handler duke@435: exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; duke@435: #elif _M_AMD64 duke@435: thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); duke@435: // Set pc to handler duke@435: exceptionInfo->ContextRecord->Rip = (DWORD64)handler; duke@435: #else duke@435: thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); duke@435: // Set pc to handler duke@435: exceptionInfo->ContextRecord->Eip = (LONG)handler; duke@435: #endif duke@435: duke@435: // Continue the execution duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: duke@435: duke@435: // Used for PostMortemDump duke@435: extern "C" void safepoints(); duke@435: extern "C" void find(int x); duke@435: extern "C" void events(); duke@435: duke@435: // According to Windows API documentation, an illegal instruction sequence should generate duke@435: // the 0xC000001C exception code. However, real world experience shows that occasionnaly duke@435: // the execution of an illegal instruction can generate the exception code 0xC000001E. This duke@435: // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). duke@435: duke@435: #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E duke@435: duke@435: // From "Execution Protection in the Windows Operating System" draft 0.35 duke@435: // Once a system header becomes available, the "real" define should be duke@435: // included or copied here. duke@435: #define EXCEPTION_INFO_EXEC_VIOLATION 0x08 duke@435: duke@435: #define def_excpt(val) #val, val duke@435: duke@435: struct siglabel { duke@435: char *name; duke@435: int number; duke@435: }; duke@435: duke@435: struct siglabel exceptlabels[] = { duke@435: def_excpt(EXCEPTION_ACCESS_VIOLATION), duke@435: def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), duke@435: def_excpt(EXCEPTION_BREAKPOINT), duke@435: def_excpt(EXCEPTION_SINGLE_STEP), duke@435: def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), duke@435: def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), duke@435: def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), duke@435: def_excpt(EXCEPTION_FLT_INEXACT_RESULT), duke@435: def_excpt(EXCEPTION_FLT_INVALID_OPERATION), duke@435: def_excpt(EXCEPTION_FLT_OVERFLOW), duke@435: def_excpt(EXCEPTION_FLT_STACK_CHECK), duke@435: def_excpt(EXCEPTION_FLT_UNDERFLOW), duke@435: def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), duke@435: def_excpt(EXCEPTION_INT_OVERFLOW), duke@435: def_excpt(EXCEPTION_PRIV_INSTRUCTION), duke@435: def_excpt(EXCEPTION_IN_PAGE_ERROR), duke@435: def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), duke@435: def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), duke@435: def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), duke@435: def_excpt(EXCEPTION_STACK_OVERFLOW), duke@435: def_excpt(EXCEPTION_INVALID_DISPOSITION), duke@435: def_excpt(EXCEPTION_GUARD_PAGE), duke@435: def_excpt(EXCEPTION_INVALID_HANDLE), duke@435: NULL, 0 duke@435: }; duke@435: duke@435: const char* os::exception_name(int exception_code, char *buf, size_t size) { duke@435: for (int i = 0; exceptlabels[i].name != NULL; i++) { duke@435: if (exceptlabels[i].number == exception_code) { duke@435: jio_snprintf(buf, size, "%s", exceptlabels[i].name); duke@435: return buf; duke@435: } duke@435: } duke@435: duke@435: return NULL; duke@435: } duke@435: duke@435: //----------------------------------------------------------------------------- duke@435: LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { duke@435: // handle exception caused by idiv; should only happen for -MinInt/-1 duke@435: // (division by zero is handled explicitly) duke@435: #ifdef _M_IA64 duke@435: assert(0, "Fix Handle_IDiv_Exception"); duke@435: #elif _M_AMD64 duke@435: PCONTEXT ctx = exceptionInfo->ContextRecord; duke@435: address pc = (address)ctx->Rip; duke@435: NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); duke@435: assert(pc[0] == 0xF7, "not an idiv opcode"); duke@435: assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); duke@435: assert(ctx->Rax == min_jint, "unexpected idiv exception"); duke@435: // set correct result values and continue after idiv instruction duke@435: ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes duke@435: ctx->Rax = (DWORD)min_jint; // result duke@435: ctx->Rdx = (DWORD)0; // remainder duke@435: // Continue the execution duke@435: #else duke@435: PCONTEXT ctx = exceptionInfo->ContextRecord; duke@435: address pc = (address)ctx->Eip; duke@435: NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); duke@435: assert(pc[0] == 0xF7, "not an idiv opcode"); duke@435: assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); duke@435: assert(ctx->Eax == min_jint, "unexpected idiv exception"); duke@435: // set correct result values and continue after idiv instruction duke@435: ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes duke@435: ctx->Eax = (DWORD)min_jint; // result duke@435: ctx->Edx = (DWORD)0; // remainder duke@435: // Continue the execution duke@435: #endif duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: duke@435: #ifndef _WIN64 duke@435: //----------------------------------------------------------------------------- duke@435: LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { dcubed@1649: // handle exception caused by native method modifying control word duke@435: PCONTEXT ctx = exceptionInfo->ContextRecord; duke@435: DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; duke@435: duke@435: switch (exception_code) { duke@435: case EXCEPTION_FLT_DENORMAL_OPERAND: duke@435: case EXCEPTION_FLT_DIVIDE_BY_ZERO: duke@435: case EXCEPTION_FLT_INEXACT_RESULT: duke@435: case EXCEPTION_FLT_INVALID_OPERATION: duke@435: case EXCEPTION_FLT_OVERFLOW: duke@435: case EXCEPTION_FLT_STACK_CHECK: duke@435: case EXCEPTION_FLT_UNDERFLOW: duke@435: jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); duke@435: if (fp_control_word != ctx->FloatSave.ControlWord) { duke@435: // Restore FPCW and mask out FLT exceptions duke@435: ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; duke@435: // Mask out pending FLT exceptions duke@435: ctx->FloatSave.StatusWord &= 0xffffff00; duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: } dcubed@1649: dcubed@1649: if (prev_uef_handler != NULL) { dcubed@1649: // We didn't handle this exception so pass it to the previous dcubed@1649: // UnhandledExceptionFilter. dcubed@1649: return (prev_uef_handler)(exceptionInfo); dcubed@1649: } dcubed@1649: duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: #else //_WIN64 duke@435: /* duke@435: On Windows, the mxcsr control bits are non-volatile across calls duke@435: See also CR 6192333 duke@435: If EXCEPTION_FLT_* happened after some native method modified duke@435: mxcsr - it is not a jvm fault. duke@435: However should we decide to restore of mxcsr after a faulty duke@435: native method we can uncomment following code duke@435: jint MxCsr = INITIAL_MXCSR; duke@435: // we can't use StubRoutines::addr_mxcsr_std() duke@435: // because in Win64 mxcsr is not saved there duke@435: if (MxCsr != ctx->MxCsr) { duke@435: ctx->MxCsr = MxCsr; duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: duke@435: */ duke@435: #endif //_WIN64 duke@435: duke@435: duke@435: // Fatal error reporting is single threaded so we can make this a duke@435: // static and preallocated. If it's more than MAX_PATH silently ignore duke@435: // it. duke@435: static char saved_error_file[MAX_PATH] = {0}; duke@435: duke@435: void os::set_error_file(const char *logfile) { duke@435: if (strlen(logfile) <= MAX_PATH) { duke@435: strncpy(saved_error_file, logfile, MAX_PATH); duke@435: } duke@435: } duke@435: duke@435: static inline void report_error(Thread* t, DWORD exception_code, duke@435: address addr, void* siginfo, void* context) { duke@435: VMError err(t, exception_code, addr, siginfo, context); duke@435: err.report_and_die(); duke@435: duke@435: // If UseOsErrorReporting, this will return here and save the error file duke@435: // somewhere where we can find it in the minidump. duke@435: } duke@435: duke@435: //----------------------------------------------------------------------------- duke@435: LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { duke@435: if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; duke@435: DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; duke@435: #ifdef _M_IA64 duke@435: address pc = (address) exceptionInfo->ContextRecord->StIIP; duke@435: #elif _M_AMD64 duke@435: address pc = (address) exceptionInfo->ContextRecord->Rip; duke@435: #else duke@435: address pc = (address) exceptionInfo->ContextRecord->Eip; duke@435: #endif duke@435: Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady duke@435: duke@435: #ifndef _WIN64 duke@435: // Execution protection violation - win32 running on AMD64 only duke@435: // Handled first to avoid misdiagnosis as a "normal" access violation; duke@435: // This is safe to do because we have a new/unique ExceptionInformation duke@435: // code for this condition. duke@435: if (exception_code == EXCEPTION_ACCESS_VIOLATION) { duke@435: PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; duke@435: int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; duke@435: address addr = (address) exceptionRecord->ExceptionInformation[1]; duke@435: duke@435: if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { duke@435: int page_size = os::vm_page_size(); duke@435: duke@435: // Make sure the pc and the faulting address are sane. duke@435: // duke@435: // If an instruction spans a page boundary, and the page containing duke@435: // the beginning of the instruction is executable but the following duke@435: // page is not, the pc and the faulting address might be slightly duke@435: // different - we still want to unguard the 2nd page in this case. duke@435: // duke@435: // 15 bytes seems to be a (very) safe value for max instruction size. duke@435: bool pc_is_near_addr = duke@435: (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); duke@435: bool instr_spans_page_boundary = duke@435: (align_size_down((intptr_t) pc ^ (intptr_t) addr, duke@435: (intptr_t) page_size) > 0); duke@435: duke@435: if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { duke@435: static volatile address last_addr = duke@435: (address) os::non_memory_address_word(); duke@435: duke@435: // In conservative mode, don't unguard unless the address is in the VM duke@435: if (UnguardOnExecutionViolation > 0 && addr != last_addr && duke@435: (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { duke@435: coleenp@912: // Set memory to RWX and retry duke@435: address page_start = duke@435: (address) align_size_down((intptr_t) addr, (intptr_t) page_size); coleenp@912: bool res = os::protect_memory((char*) page_start, page_size, coleenp@912: os::MEM_PROT_RWX); duke@435: duke@435: if (PrintMiscellaneous && Verbose) { duke@435: char buf[256]; duke@435: jio_snprintf(buf, sizeof(buf), "Execution protection violation " duke@435: "at " INTPTR_FORMAT duke@435: ", unguarding " INTPTR_FORMAT ": %s", addr, duke@435: page_start, (res ? "success" : strerror(errno))); duke@435: tty->print_raw_cr(buf); duke@435: } duke@435: duke@435: // Set last_addr so if we fault again at the same address, we don't duke@435: // end up in an endless loop. duke@435: // duke@435: // There are two potential complications here. Two threads trapping duke@435: // at the same address at the same time could cause one of the duke@435: // threads to think it already unguarded, and abort the VM. Likely duke@435: // very rare. duke@435: // duke@435: // The other race involves two threads alternately trapping at duke@435: // different addresses and failing to unguard the page, resulting in duke@435: // an endless loop. This condition is probably even more unlikely duke@435: // than the first. duke@435: // duke@435: // Although both cases could be avoided by using locks or thread duke@435: // local last_addr, these solutions are unnecessary complication: duke@435: // this handler is a best-effort safety net, not a complete solution. duke@435: // It is disabled by default and should only be used as a workaround duke@435: // in case we missed any no-execute-unsafe VM code. duke@435: duke@435: last_addr = addr; duke@435: duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: } duke@435: duke@435: // Last unguard failed or not unguarding duke@435: tty->print_raw_cr("Execution protection violation"); duke@435: report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: } duke@435: #endif // _WIN64 duke@435: duke@435: // Check to see if we caught the safepoint code in the duke@435: // process of write protecting the memory serialization page. duke@435: // It write enables the page immediately after protecting it duke@435: // so just return. duke@435: if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { duke@435: JavaThread* thread = (JavaThread*) t; duke@435: PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; duke@435: address addr = (address) exceptionRecord->ExceptionInformation[1]; duke@435: if ( os::is_memory_serialize_page(thread, addr) ) { duke@435: // Block current thread until the memory serialize page permission restored. duke@435: os::block_on_serialize_page_trap(); duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: } duke@435: duke@435: duke@435: if (t != NULL && t->is_Java_thread()) { duke@435: JavaThread* thread = (JavaThread*) t; duke@435: bool in_java = thread->thread_state() == _thread_in_Java; duke@435: duke@435: // Handle potential stack overflows up front. duke@435: if (exception_code == EXCEPTION_STACK_OVERFLOW) { duke@435: if (os::uses_stack_guard_pages()) { duke@435: #ifdef _M_IA64 duke@435: // duke@435: // If it's a legal stack address continue, Windows will map it in. duke@435: // duke@435: PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; duke@435: address addr = (address) exceptionRecord->ExceptionInformation[1]; duke@435: if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: duke@435: // The register save area is the same size as the memory stack duke@435: // and starts at the page just above the start of the memory stack. duke@435: // If we get a fault in this area, we've run out of register duke@435: // stack. If we are in java, try throwing a stack overflow exception. duke@435: if (addr > thread->stack_base() && duke@435: addr <= (thread->stack_base()+thread->stack_size()) ) { duke@435: char buf[256]; duke@435: jio_snprintf(buf, sizeof(buf), duke@435: "Register stack overflow, addr:%p, stack_base:%p\n", duke@435: addr, thread->stack_base() ); duke@435: tty->print_raw_cr(buf); duke@435: // If not in java code, return and hope for the best. duke@435: return in_java ? Handle_Exception(exceptionInfo, duke@435: SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) duke@435: : EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: #endif duke@435: if (thread->stack_yellow_zone_enabled()) { duke@435: // Yellow zone violation. The o/s has unprotected the first yellow duke@435: // zone page for us. Note: must call disable_stack_yellow_zone to duke@435: // update the enabled status, even if the zone contains only one page. duke@435: thread->disable_stack_yellow_zone(); duke@435: // If not in java code, return and hope for the best. duke@435: return in_java ? Handle_Exception(exceptionInfo, duke@435: SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) duke@435: : EXCEPTION_CONTINUE_EXECUTION; duke@435: } else { duke@435: // Fatal red zone violation. duke@435: thread->disable_stack_red_zone(); duke@435: tty->print_raw_cr("An unrecoverable stack overflow has occurred."); duke@435: report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: } else if (in_java) { duke@435: // JVM-managed guard pages cannot be used on win95/98. The o/s provides duke@435: // a one-time-only guard page, which it has released to us. The next duke@435: // stack overflow on this thread will result in an ACCESS_VIOLATION. duke@435: return Handle_Exception(exceptionInfo, duke@435: SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); duke@435: } else { duke@435: // Can only return and hope for the best. Further stack growth will duke@435: // result in an ACCESS_VIOLATION. duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { duke@435: // Either stack overflow or null pointer exception. duke@435: if (in_java) { duke@435: PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; duke@435: address addr = (address) exceptionRecord->ExceptionInformation[1]; duke@435: address stack_end = thread->stack_base() - thread->stack_size(); duke@435: if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { duke@435: // Stack overflow. duke@435: assert(!os::uses_stack_guard_pages(), duke@435: "should be caught by red zone code above."); duke@435: return Handle_Exception(exceptionInfo, duke@435: SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); duke@435: } duke@435: // duke@435: // Check for safepoint polling and implicit null duke@435: // We only expect null pointers in the stubs (vtable) duke@435: // the rest are checked explicitly now. duke@435: // duke@435: CodeBlob* cb = CodeCache::find_blob(pc); duke@435: if (cb != NULL) { duke@435: if (os::is_poll_address(addr)) { duke@435: address stub = SharedRuntime::get_poll_stub(pc); duke@435: return Handle_Exception(exceptionInfo, stub); duke@435: } duke@435: } duke@435: { duke@435: #ifdef _WIN64 duke@435: // duke@435: // If it's a legal stack address map the entire region in duke@435: // duke@435: PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; duke@435: address addr = (address) exceptionRecord->ExceptionInformation[1]; duke@435: if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { duke@435: addr = (address)((uintptr_t)addr & duke@435: (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); coleenp@1091: os::commit_memory((char *)addr, thread->stack_base() - addr, coleenp@1091: false ); duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: else duke@435: #endif duke@435: { duke@435: // Null pointer exception. duke@435: #ifdef _M_IA64 duke@435: // We catch register stack overflows in compiled code by doing duke@435: // an explicit compare and executing a st8(G0, G0) if the duke@435: // BSP enters into our guard area. We test for the overflow duke@435: // condition and fall into the normal null pointer exception duke@435: // code if BSP hasn't overflowed. duke@435: if ( in_java ) { duke@435: if(thread->register_stack_overflow()) { duke@435: assert((address)exceptionInfo->ContextRecord->IntS3 == duke@435: thread->register_stack_limit(), duke@435: "GR7 doesn't contain register_stack_limit"); duke@435: // Disable the yellow zone which sets the state that duke@435: // we've got a stack overflow problem. duke@435: if (thread->stack_yellow_zone_enabled()) { duke@435: thread->disable_stack_yellow_zone(); duke@435: } duke@435: // Give us some room to process the exception duke@435: thread->disable_register_stack_guard(); duke@435: // Update GR7 with the new limit so we can continue running duke@435: // compiled code. duke@435: exceptionInfo->ContextRecord->IntS3 = duke@435: (ULONGLONG)thread->register_stack_limit(); duke@435: return Handle_Exception(exceptionInfo, duke@435: SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); duke@435: } else { duke@435: // duke@435: // Check for implicit null duke@435: // We only expect null pointers in the stubs (vtable) duke@435: // the rest are checked explicitly now. duke@435: // poonam@900: if (((uintptr_t)addr) < os::vm_page_size() ) { poonam@900: // an access to the first page of VM--assume it is a null pointer poonam@900: address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); poonam@900: if (stub != NULL) return Handle_Exception(exceptionInfo, stub); duke@435: } duke@435: } duke@435: } // in_java duke@435: duke@435: // IA64 doesn't use implicit null checking yet. So we shouldn't duke@435: // get here. duke@435: tty->print_raw_cr("Access violation, possible null pointer exception"); duke@435: report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: #else /* !IA64 */ duke@435: duke@435: // Windows 98 reports faulting addresses incorrectly duke@435: if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || duke@435: !os::win32::is_nt()) { poonam@900: address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); poonam@900: if (stub != NULL) return Handle_Exception(exceptionInfo, stub); duke@435: } duke@435: report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: #endif duke@435: } duke@435: } duke@435: } duke@435: duke@435: #ifdef _WIN64 duke@435: // Special care for fast JNI field accessors. duke@435: // jni_fast_GetField can trap at certain pc's if a GC kicks duke@435: // in and the heap gets shrunk before the field access. duke@435: if (exception_code == EXCEPTION_ACCESS_VIOLATION) { duke@435: address addr = JNI_FastGetField::find_slowcase_pc(pc); duke@435: if (addr != (address)-1) { duke@435: return Handle_Exception(exceptionInfo, addr); duke@435: } duke@435: } duke@435: #endif duke@435: duke@435: #ifdef _WIN64 duke@435: // Windows will sometimes generate an access violation duke@435: // when we call malloc. Since we use VectoredExceptions duke@435: // on 64 bit platforms, we see this exception. We must duke@435: // pass this exception on so Windows can recover. duke@435: // We check to see if the pc of the fault is in NTDLL.DLL duke@435: // if so, we pass control on to Windows for handling. duke@435: if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH; duke@435: #endif duke@435: duke@435: // Stack overflow or null pointer exception in native code. duke@435: report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: duke@435: if (in_java) { duke@435: switch (exception_code) { duke@435: case EXCEPTION_INT_DIVIDE_BY_ZERO: duke@435: return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); duke@435: duke@435: case EXCEPTION_INT_OVERFLOW: duke@435: return Handle_IDiv_Exception(exceptionInfo); duke@435: duke@435: } // switch duke@435: } duke@435: #ifndef _WIN64 duke@435: if ((thread->thread_state() == _thread_in_Java) || duke@435: (thread->thread_state() == _thread_in_native) ) duke@435: { duke@435: LONG result=Handle_FLT_Exception(exceptionInfo); duke@435: if (result==EXCEPTION_CONTINUE_EXECUTION) return result; duke@435: } duke@435: #endif //_WIN64 duke@435: } duke@435: duke@435: if (exception_code != EXCEPTION_BREAKPOINT) { duke@435: #ifndef _WIN64 duke@435: report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: #else duke@435: // Itanium Windows uses a VectoredExceptionHandler duke@435: // Which means that C++ programatic exception handlers (try/except) duke@435: // will get here. Continue the search for the right except block if duke@435: // the exception code is not a fatal code. duke@435: switch ( exception_code ) { duke@435: case EXCEPTION_ACCESS_VIOLATION: duke@435: case EXCEPTION_STACK_OVERFLOW: duke@435: case EXCEPTION_ILLEGAL_INSTRUCTION: duke@435: case EXCEPTION_ILLEGAL_INSTRUCTION_2: duke@435: case EXCEPTION_INT_OVERFLOW: duke@435: case EXCEPTION_INT_DIVIDE_BY_ZERO: duke@435: { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, duke@435: exceptionInfo->ContextRecord); duke@435: } duke@435: break; duke@435: default: duke@435: break; duke@435: } duke@435: #endif duke@435: } duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: duke@435: #ifndef _WIN64 duke@435: // Special care for fast JNI accessors. duke@435: // jni_fast_GetField can trap at certain pc's if a GC kicks in and duke@435: // the heap gets shrunk before the field access. duke@435: // Need to install our own structured exception handler since native code may duke@435: // install its own. duke@435: LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { duke@435: DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; duke@435: if (exception_code == EXCEPTION_ACCESS_VIOLATION) { duke@435: address pc = (address) exceptionInfo->ContextRecord->Eip; duke@435: address addr = JNI_FastGetField::find_slowcase_pc(pc); duke@435: if (addr != (address)-1) { duke@435: return Handle_Exception(exceptionInfo, addr); duke@435: } duke@435: } duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: duke@435: #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ duke@435: Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ duke@435: __try { \ duke@435: return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ duke@435: } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ duke@435: } \ duke@435: return 0; \ duke@435: } duke@435: duke@435: DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) duke@435: DEFINE_FAST_GETFIELD(jbyte, byte, Byte) duke@435: DEFINE_FAST_GETFIELD(jchar, char, Char) duke@435: DEFINE_FAST_GETFIELD(jshort, short, Short) duke@435: DEFINE_FAST_GETFIELD(jint, int, Int) duke@435: DEFINE_FAST_GETFIELD(jlong, long, Long) duke@435: DEFINE_FAST_GETFIELD(jfloat, float, Float) duke@435: DEFINE_FAST_GETFIELD(jdouble, double, Double) duke@435: duke@435: address os::win32::fast_jni_accessor_wrapper(BasicType type) { duke@435: switch (type) { duke@435: case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; duke@435: case T_BYTE: return (address)jni_fast_GetByteField_wrapper; duke@435: case T_CHAR: return (address)jni_fast_GetCharField_wrapper; duke@435: case T_SHORT: return (address)jni_fast_GetShortField_wrapper; duke@435: case T_INT: return (address)jni_fast_GetIntField_wrapper; duke@435: case T_LONG: return (address)jni_fast_GetLongField_wrapper; duke@435: case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; duke@435: case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; duke@435: default: ShouldNotReachHere(); duke@435: } duke@435: return (address)-1; duke@435: } duke@435: #endif duke@435: duke@435: // Virtual Memory duke@435: duke@435: int os::vm_page_size() { return os::win32::vm_page_size(); } duke@435: int os::vm_allocation_granularity() { duke@435: return os::win32::vm_allocation_granularity(); duke@435: } duke@435: duke@435: // Windows large page support is available on Windows 2003. In order to use duke@435: // large page memory, the administrator must first assign additional privilege duke@435: // to the user: duke@435: // + select Control Panel -> Administrative Tools -> Local Security Policy duke@435: // + select Local Policies -> User Rights Assignment duke@435: // + double click "Lock pages in memory", add users and/or groups duke@435: // + reboot duke@435: // Note the above steps are needed for administrator as well, as administrators duke@435: // by default do not have the privilege to lock pages in memory. duke@435: // duke@435: // Note about Windows 2003: although the API supports committing large page duke@435: // memory on a page-by-page basis and VirtualAlloc() returns success under this duke@435: // scenario, I found through experiment it only uses large page if the entire duke@435: // memory region is reserved and committed in a single VirtualAlloc() call. duke@435: // This makes Windows large page support more or less like Solaris ISM, in duke@435: // that the entire heap must be committed upfront. This probably will change duke@435: // in the future, if so the code below needs to be revisited. duke@435: duke@435: #ifndef MEM_LARGE_PAGES duke@435: #define MEM_LARGE_PAGES 0x20000000 duke@435: #endif duke@435: duke@435: // GetLargePageMinimum is only available on Windows 2003. The other functions duke@435: // are available on NT but not on Windows 98/Me. We have to resolve them at duke@435: // runtime. duke@435: typedef SIZE_T (WINAPI *GetLargePageMinimum_func_type) (void); duke@435: typedef BOOL (WINAPI *AdjustTokenPrivileges_func_type) duke@435: (HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); duke@435: typedef BOOL (WINAPI *OpenProcessToken_func_type) (HANDLE, DWORD, PHANDLE); duke@435: typedef BOOL (WINAPI *LookupPrivilegeValue_func_type) (LPCTSTR, LPCTSTR, PLUID); duke@435: duke@435: static GetLargePageMinimum_func_type _GetLargePageMinimum; duke@435: static AdjustTokenPrivileges_func_type _AdjustTokenPrivileges; duke@435: static OpenProcessToken_func_type _OpenProcessToken; duke@435: static LookupPrivilegeValue_func_type _LookupPrivilegeValue; duke@435: duke@435: static HINSTANCE _kernel32; duke@435: static HINSTANCE _advapi32; duke@435: static HANDLE _hProcess; duke@435: static HANDLE _hToken; duke@435: duke@435: static size_t _large_page_size = 0; duke@435: duke@435: static bool resolve_functions_for_large_page_init() { duke@435: _kernel32 = LoadLibrary("kernel32.dll"); duke@435: if (_kernel32 == NULL) return false; duke@435: duke@435: _GetLargePageMinimum = CAST_TO_FN_PTR(GetLargePageMinimum_func_type, duke@435: GetProcAddress(_kernel32, "GetLargePageMinimum")); duke@435: if (_GetLargePageMinimum == NULL) return false; duke@435: duke@435: _advapi32 = LoadLibrary("advapi32.dll"); duke@435: if (_advapi32 == NULL) return false; duke@435: duke@435: _AdjustTokenPrivileges = CAST_TO_FN_PTR(AdjustTokenPrivileges_func_type, duke@435: GetProcAddress(_advapi32, "AdjustTokenPrivileges")); duke@435: _OpenProcessToken = CAST_TO_FN_PTR(OpenProcessToken_func_type, duke@435: GetProcAddress(_advapi32, "OpenProcessToken")); duke@435: _LookupPrivilegeValue = CAST_TO_FN_PTR(LookupPrivilegeValue_func_type, duke@435: GetProcAddress(_advapi32, "LookupPrivilegeValueA")); duke@435: return _AdjustTokenPrivileges != NULL && duke@435: _OpenProcessToken != NULL && duke@435: _LookupPrivilegeValue != NULL; duke@435: } duke@435: duke@435: static bool request_lock_memory_privilege() { duke@435: _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, duke@435: os::current_process_id()); duke@435: duke@435: LUID luid; duke@435: if (_hProcess != NULL && duke@435: _OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && duke@435: _LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { duke@435: duke@435: TOKEN_PRIVILEGES tp; duke@435: tp.PrivilegeCount = 1; duke@435: tp.Privileges[0].Luid = luid; duke@435: tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; duke@435: duke@435: // AdjustTokenPrivileges() may return TRUE even when it couldn't change the duke@435: // privilege. Check GetLastError() too. See MSDN document. duke@435: if (_AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && duke@435: (GetLastError() == ERROR_SUCCESS)) { duke@435: return true; duke@435: } duke@435: } duke@435: duke@435: return false; duke@435: } duke@435: duke@435: static void cleanup_after_large_page_init() { duke@435: _GetLargePageMinimum = NULL; duke@435: _AdjustTokenPrivileges = NULL; duke@435: _OpenProcessToken = NULL; duke@435: _LookupPrivilegeValue = NULL; duke@435: if (_kernel32) FreeLibrary(_kernel32); duke@435: _kernel32 = NULL; duke@435: if (_advapi32) FreeLibrary(_advapi32); duke@435: _advapi32 = NULL; duke@435: if (_hProcess) CloseHandle(_hProcess); duke@435: _hProcess = NULL; duke@435: if (_hToken) CloseHandle(_hToken); duke@435: _hToken = NULL; duke@435: } duke@435: duke@435: bool os::large_page_init() { duke@435: if (!UseLargePages) return false; duke@435: duke@435: // print a warning if any large page related flag is specified on command line duke@435: bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || duke@435: !FLAG_IS_DEFAULT(LargePageSizeInBytes); duke@435: bool success = false; duke@435: duke@435: # define WARN(msg) if (warn_on_failure) { warning(msg); } duke@435: if (resolve_functions_for_large_page_init()) { duke@435: if (request_lock_memory_privilege()) { duke@435: size_t s = _GetLargePageMinimum(); duke@435: if (s) { duke@435: #if defined(IA32) || defined(AMD64) duke@435: if (s > 4*M || LargePageSizeInBytes > 4*M) { duke@435: WARN("JVM cannot use large pages bigger than 4mb."); duke@435: } else { duke@435: #endif duke@435: if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { duke@435: _large_page_size = LargePageSizeInBytes; duke@435: } else { duke@435: _large_page_size = s; duke@435: } duke@435: success = true; duke@435: #if defined(IA32) || defined(AMD64) duke@435: } duke@435: #endif duke@435: } else { duke@435: WARN("Large page is not supported by the processor."); duke@435: } duke@435: } else { duke@435: WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); duke@435: } duke@435: } else { duke@435: WARN("Large page is not supported by the operating system."); duke@435: } duke@435: #undef WARN duke@435: duke@435: const size_t default_page_size = (size_t) vm_page_size(); duke@435: if (success && _large_page_size > default_page_size) { duke@435: _page_sizes[0] = _large_page_size; duke@435: _page_sizes[1] = default_page_size; duke@435: _page_sizes[2] = 0; duke@435: } duke@435: duke@435: cleanup_after_large_page_init(); duke@435: return success; duke@435: } duke@435: duke@435: // On win32, one cannot release just a part of reserved memory, it's an duke@435: // all or nothing deal. When we split a reservation, we must break the duke@435: // reservation into two reservations. duke@435: void os::split_reserved_memory(char *base, size_t size, size_t split, duke@435: bool realloc) { duke@435: if (size > 0) { duke@435: release_memory(base, size); duke@435: if (realloc) { duke@435: reserve_memory(split, base); duke@435: } duke@435: if (size != split) { duke@435: reserve_memory(size - split, base + split); duke@435: } duke@435: } duke@435: } duke@435: duke@435: char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { duke@435: assert((size_t)addr % os::vm_allocation_granularity() == 0, duke@435: "reserve alignment"); duke@435: assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); coleenp@1091: char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE); duke@435: assert(res == NULL || addr == NULL || addr == res, duke@435: "Unexpected address from reserve."); duke@435: return res; duke@435: } duke@435: duke@435: // Reserve memory at an arbitrary address, only if that area is duke@435: // available (and not reserved for something else). duke@435: char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { duke@435: // Windows os::reserve_memory() fails of the requested address range is duke@435: // not avilable. duke@435: return reserve_memory(bytes, requested_addr); duke@435: } duke@435: duke@435: size_t os::large_page_size() { duke@435: return _large_page_size; duke@435: } duke@435: duke@435: bool os::can_commit_large_page_memory() { duke@435: // Windows only uses large page memory when the entire region is reserved duke@435: // and committed in a single VirtualAlloc() call. This may change in the duke@435: // future, but with Windows 2003 it's not possible to commit on demand. duke@435: return false; duke@435: } duke@435: jcoomes@514: bool os::can_execute_large_page_memory() { jcoomes@514: return true; jcoomes@514: } jcoomes@514: coleenp@1091: char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { coleenp@912: coleenp@1152: const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; jmasa@824: jmasa@824: if (UseLargePagesIndividualAllocation) { jmasa@824: if (TracePageSizes && Verbose) { jmasa@824: tty->print_cr("Reserving large pages individually."); jmasa@824: } jmasa@824: char * p_buf; jmasa@824: // first reserve enough address space in advance since we want to be jmasa@824: // able to break a single contiguous virtual address range into multiple jmasa@824: // large page commits but WS2003 does not allow reserving large page space jmasa@824: // so we just use 4K pages for reserve, this gives us a legal contiguous jmasa@824: // address space. then we will deallocate that reservation, and re alloc jmasa@824: // using large pages jmasa@824: const size_t size_of_reserve = bytes + _large_page_size; jmasa@824: if (bytes > size_of_reserve) { jmasa@824: // Overflowed. jmasa@824: warning("Individually allocated large pages failed, " jmasa@824: "use -XX:-UseLargePagesIndividualAllocation to turn off"); jmasa@824: return NULL; jmasa@824: } kvn@1077: p_buf = (char *) VirtualAlloc(addr, jmasa@824: size_of_reserve, // size of Reserve jmasa@824: MEM_RESERVE, coleenp@1091: PAGE_READWRITE); jmasa@824: // If reservation failed, return NULL jmasa@824: if (p_buf == NULL) return NULL; jmasa@824: jmasa@824: release_memory(p_buf, bytes + _large_page_size); jmasa@824: // round up to page boundary. If the size_of_reserve did not jmasa@824: // overflow and the reservation did not fail, this align up jmasa@824: // should not overflow. jmasa@824: p_buf = (char *) align_size_up((size_t)p_buf, _large_page_size); jmasa@824: jmasa@824: // now go through and allocate one page at a time until all bytes are jmasa@824: // allocated jmasa@824: size_t bytes_remaining = align_size_up(bytes, _large_page_size); jmasa@824: // An overflow of align_size_up() would have been caught above jmasa@824: // in the calculation of size_of_reserve. jmasa@824: char * next_alloc_addr = p_buf; jmasa@824: jmasa@824: #ifdef ASSERT jmasa@824: // Variable for the failure injection jmasa@824: long ran_num = os::random(); jmasa@824: size_t fail_after = ran_num % bytes; jmasa@824: #endif jmasa@824: jmasa@824: while (bytes_remaining) { jmasa@824: size_t bytes_to_rq = MIN2(bytes_remaining, _large_page_size); jmasa@824: // Note allocate and commit jmasa@824: char * p_new; jmasa@824: jmasa@824: #ifdef ASSERT jmasa@824: bool inject_error = LargePagesIndividualAllocationInjectError && jmasa@824: (bytes_remaining <= fail_after); jmasa@824: #else jmasa@824: const bool inject_error = false; jmasa@824: #endif jmasa@824: jmasa@824: if (inject_error) { jmasa@824: p_new = NULL; jmasa@824: } else { jmasa@824: p_new = (char *) VirtualAlloc(next_alloc_addr, jmasa@824: bytes_to_rq, jmasa@824: MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES, coleenp@1152: prot); jmasa@824: } jmasa@824: jmasa@824: if (p_new == NULL) { jmasa@824: // Free any allocated pages jmasa@824: if (next_alloc_addr > p_buf) { jmasa@824: // Some memory was committed so release it. jmasa@824: size_t bytes_to_release = bytes - bytes_remaining; jmasa@824: release_memory(p_buf, bytes_to_release); jmasa@824: } jmasa@824: #ifdef ASSERT jmasa@824: if (UseLargePagesIndividualAllocation && jmasa@824: LargePagesIndividualAllocationInjectError) { jmasa@824: if (TracePageSizes && Verbose) { jmasa@824: tty->print_cr("Reserving large pages individually failed."); jmasa@824: } jmasa@824: } jmasa@824: #endif jmasa@824: return NULL; jmasa@824: } jmasa@824: bytes_remaining -= bytes_to_rq; jmasa@824: next_alloc_addr += bytes_to_rq; jmasa@824: } jmasa@824: jmasa@824: return p_buf; jmasa@824: jmasa@824: } else { jmasa@824: // normal policy just allocate it all at once jmasa@824: DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; coleenp@1152: char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot); jmasa@824: return res; jmasa@824: } duke@435: } duke@435: duke@435: bool os::release_memory_special(char* base, size_t bytes) { duke@435: return release_memory(base, bytes); duke@435: } duke@435: duke@435: void os::print_statistics() { duke@435: } duke@435: coleenp@1091: bool os::commit_memory(char* addr, size_t bytes, bool exec) { duke@435: if (bytes == 0) { duke@435: // Don't bother the OS with noops. duke@435: return true; duke@435: } duke@435: assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); duke@435: assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); duke@435: // Don't attempt to print anything if the OS call fails. We're duke@435: // probably low on resources, so the print itself may cause crashes. coleenp@1091: bool result = VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) != 0; coleenp@1091: if (result != NULL && exec) { coleenp@1091: DWORD oldprot; coleenp@1091: // Windows doc says to use VirtualProtect to get execute permissions coleenp@1091: return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot) != 0; coleenp@1091: } else { coleenp@1091: return result; coleenp@1091: } duke@435: } duke@435: coleenp@1091: bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, coleenp@1091: bool exec) { coleenp@1091: return commit_memory(addr, size, exec); duke@435: } duke@435: duke@435: bool os::uncommit_memory(char* addr, size_t bytes) { duke@435: if (bytes == 0) { duke@435: // Don't bother the OS with noops. duke@435: return true; duke@435: } duke@435: assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); duke@435: assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); duke@435: return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0; duke@435: } duke@435: duke@435: bool os::release_memory(char* addr, size_t bytes) { duke@435: return VirtualFree(addr, 0, MEM_RELEASE) != 0; duke@435: } duke@435: coleenp@1755: bool os::create_stack_guard_pages(char* addr, size_t size) { coleenp@1755: return os::commit_memory(addr, size); coleenp@1755: } coleenp@1755: coleenp@1755: bool os::remove_stack_guard_pages(char* addr, size_t size) { coleenp@1755: return os::uncommit_memory(addr, size); coleenp@1755: } coleenp@1755: coleenp@672: // Set protections specified coleenp@672: bool os::protect_memory(char* addr, size_t bytes, ProtType prot, coleenp@672: bool is_committed) { coleenp@672: unsigned int p = 0; coleenp@672: switch (prot) { coleenp@672: case MEM_PROT_NONE: p = PAGE_NOACCESS; break; coleenp@672: case MEM_PROT_READ: p = PAGE_READONLY; break; coleenp@672: case MEM_PROT_RW: p = PAGE_READWRITE; break; coleenp@672: case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; coleenp@672: default: coleenp@672: ShouldNotReachHere(); coleenp@672: } coleenp@672: duke@435: DWORD old_status; coleenp@672: coleenp@672: // Strange enough, but on Win32 one can change protection only for committed coleenp@672: // memory, not a big deal anyway, as bytes less or equal than 64K coleenp@1091: if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) { coleenp@672: fatal("cannot commit protection page"); coleenp@672: } coleenp@672: // One cannot use os::guard_memory() here, as on Win32 guard page coleenp@672: // have different (one-shot) semantics, from MSDN on PAGE_GUARD: coleenp@672: // coleenp@672: // Pages in the region become guard pages. Any attempt to access a guard page coleenp@672: // causes the system to raise a STATUS_GUARD_PAGE exception and turn off coleenp@672: // the guard page status. Guard pages thus act as a one-time access alarm. coleenp@672: return VirtualProtect(addr, bytes, p, &old_status) != 0; duke@435: } duke@435: duke@435: bool os::guard_memory(char* addr, size_t bytes) { duke@435: DWORD old_status; coleenp@912: return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0; duke@435: } duke@435: duke@435: bool os::unguard_memory(char* addr, size_t bytes) { duke@435: DWORD old_status; coleenp@912: return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0; duke@435: } duke@435: duke@435: void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } duke@435: void os::free_memory(char *addr, size_t bytes) { } duke@435: void os::numa_make_global(char *addr, size_t bytes) { } iveresov@576: void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } duke@435: bool os::numa_topology_changed() { return false; } duke@435: size_t os::numa_get_groups_num() { return 1; } duke@435: int os::numa_get_group_id() { return 0; } duke@435: size_t os::numa_get_leaf_groups(int *ids, size_t size) { duke@435: if (size > 0) { duke@435: ids[0] = 0; duke@435: return 1; duke@435: } duke@435: return 0; duke@435: } duke@435: duke@435: bool os::get_page_info(char *start, page_info* info) { duke@435: return false; duke@435: } duke@435: duke@435: char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { duke@435: return end; duke@435: } duke@435: duke@435: char* os::non_memory_address_word() { duke@435: // Must never look like an address returned by reserve_memory, duke@435: // even in its subfields (as defined by the CPU immediate fields, duke@435: // if the CPU splits constants across multiple instructions). duke@435: return (char*)-1; duke@435: } duke@435: duke@435: #define MAX_ERROR_COUNT 100 duke@435: #define SYS_THREAD_ERROR 0xffffffffUL duke@435: duke@435: void os::pd_start_thread(Thread* thread) { duke@435: DWORD ret = ResumeThread(thread->osthread()->thread_handle()); duke@435: // Returns previous suspend state: duke@435: // 0: Thread was not suspended duke@435: // 1: Thread is running now duke@435: // >1: Thread is still suspended. duke@435: assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back duke@435: } duke@435: duke@435: size_t os::read(int fd, void *buf, unsigned int nBytes) { duke@435: return ::read(fd, buf, nBytes); duke@435: } duke@435: duke@435: class HighResolutionInterval { duke@435: // The default timer resolution seems to be 10 milliseconds. duke@435: // (Where is this written down?) duke@435: // If someone wants to sleep for only a fraction of the default, duke@435: // then we set the timer resolution down to 1 millisecond for duke@435: // the duration of their interval. duke@435: // We carefully set the resolution back, since otherwise we duke@435: // seem to incur an overhead (3%?) that we don't need. duke@435: // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. duke@435: // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). duke@435: // Alternatively, we could compute the relative error (503/500 = .6%) and only use duke@435: // timeBeginPeriod() if the relative error exceeded some threshold. duke@435: // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and duke@435: // to decreased efficiency related to increased timer "tick" rates. We want to minimize duke@435: // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high duke@435: // resolution timers running. duke@435: private: duke@435: jlong resolution; duke@435: public: duke@435: HighResolutionInterval(jlong ms) { duke@435: resolution = ms % 10L; duke@435: if (resolution != 0) { duke@435: MMRESULT result = timeBeginPeriod(1L); duke@435: } duke@435: } duke@435: ~HighResolutionInterval() { duke@435: if (resolution != 0) { duke@435: MMRESULT result = timeEndPeriod(1L); duke@435: } duke@435: resolution = 0L; duke@435: } duke@435: }; duke@435: duke@435: int os::sleep(Thread* thread, jlong ms, bool interruptable) { duke@435: jlong limit = (jlong) MAXDWORD; duke@435: duke@435: while(ms > limit) { duke@435: int res; duke@435: if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) duke@435: return res; duke@435: ms -= limit; duke@435: } duke@435: duke@435: assert(thread == Thread::current(), "thread consistency check"); duke@435: OSThread* osthread = thread->osthread(); duke@435: OSThreadWaitState osts(osthread, false /* not Object.wait() */); duke@435: int result; duke@435: if (interruptable) { duke@435: assert(thread->is_Java_thread(), "must be java thread"); duke@435: JavaThread *jt = (JavaThread *) thread; duke@435: ThreadBlockInVM tbivm(jt); duke@435: duke@435: jt->set_suspend_equivalent(); duke@435: // cleared by handle_special_suspend_equivalent_condition() or duke@435: // java_suspend_self() via check_and_wait_while_suspended() duke@435: duke@435: HANDLE events[1]; duke@435: events[0] = osthread->interrupt_event(); duke@435: HighResolutionInterval *phri=NULL; duke@435: if(!ForceTimeHighResolution) duke@435: phri = new HighResolutionInterval( ms ); duke@435: if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { duke@435: result = OS_TIMEOUT; duke@435: } else { duke@435: ResetEvent(osthread->interrupt_event()); duke@435: osthread->set_interrupted(false); duke@435: result = OS_INTRPT; duke@435: } duke@435: delete phri; //if it is NULL, harmless duke@435: duke@435: // were we externally suspended while we were waiting? duke@435: jt->check_and_wait_while_suspended(); duke@435: } else { duke@435: assert(!thread->is_Java_thread(), "must not be java thread"); duke@435: Sleep((long) ms); duke@435: result = OS_TIMEOUT; duke@435: } duke@435: return result; duke@435: } duke@435: duke@435: // Sleep forever; naked call to OS-specific sleep; use with CAUTION duke@435: void os::infinite_sleep() { duke@435: while (true) { // sleep forever ... duke@435: Sleep(100000); // ... 100 seconds at a time duke@435: } duke@435: } duke@435: duke@435: typedef BOOL (WINAPI * STTSignature)(void) ; duke@435: duke@435: os::YieldResult os::NakedYield() { duke@435: // Use either SwitchToThread() or Sleep(0) duke@435: // Consider passing back the return value from SwitchToThread(). duke@435: // We use GetProcAddress() as ancient Win9X versions of windows doen't support SwitchToThread. duke@435: // In that case we revert to Sleep(0). duke@435: static volatile STTSignature stt = (STTSignature) 1 ; duke@435: duke@435: if (stt == ((STTSignature) 1)) { duke@435: stt = (STTSignature) ::GetProcAddress (LoadLibrary ("Kernel32.dll"), "SwitchToThread") ; duke@435: // It's OK if threads race during initialization as the operation above is idempotent. duke@435: } duke@435: if (stt != NULL) { duke@435: return (*stt)() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; duke@435: } else { duke@435: Sleep (0) ; duke@435: } duke@435: return os::YIELD_UNKNOWN ; duke@435: } duke@435: duke@435: void os::yield() { os::NakedYield(); } duke@435: duke@435: void os::yield_all(int attempts) { duke@435: // Yields to all threads, including threads with lower priorities duke@435: Sleep(1); duke@435: } duke@435: duke@435: // Win32 only gives you access to seven real priorities at a time, duke@435: // so we compress Java's ten down to seven. It would be better duke@435: // if we dynamically adjusted relative priorities. duke@435: duke@435: int os::java_to_os_priority[MaxPriority + 1] = { duke@435: THREAD_PRIORITY_IDLE, // 0 Entry should never be used duke@435: THREAD_PRIORITY_LOWEST, // 1 MinPriority duke@435: THREAD_PRIORITY_LOWEST, // 2 duke@435: THREAD_PRIORITY_BELOW_NORMAL, // 3 duke@435: THREAD_PRIORITY_BELOW_NORMAL, // 4 duke@435: THREAD_PRIORITY_NORMAL, // 5 NormPriority duke@435: THREAD_PRIORITY_NORMAL, // 6 duke@435: THREAD_PRIORITY_ABOVE_NORMAL, // 7 duke@435: THREAD_PRIORITY_ABOVE_NORMAL, // 8 duke@435: THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority duke@435: THREAD_PRIORITY_HIGHEST // 10 MaxPriority duke@435: }; duke@435: duke@435: int prio_policy1[MaxPriority + 1] = { duke@435: THREAD_PRIORITY_IDLE, // 0 Entry should never be used duke@435: THREAD_PRIORITY_LOWEST, // 1 MinPriority duke@435: THREAD_PRIORITY_LOWEST, // 2 duke@435: THREAD_PRIORITY_BELOW_NORMAL, // 3 duke@435: THREAD_PRIORITY_BELOW_NORMAL, // 4 duke@435: THREAD_PRIORITY_NORMAL, // 5 NormPriority duke@435: THREAD_PRIORITY_ABOVE_NORMAL, // 6 duke@435: THREAD_PRIORITY_ABOVE_NORMAL, // 7 duke@435: THREAD_PRIORITY_HIGHEST, // 8 duke@435: THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority duke@435: THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority duke@435: }; duke@435: duke@435: static int prio_init() { duke@435: // If ThreadPriorityPolicy is 1, switch tables duke@435: if (ThreadPriorityPolicy == 1) { duke@435: int i; duke@435: for (i = 0; i < MaxPriority + 1; i++) { duke@435: os::java_to_os_priority[i] = prio_policy1[i]; duke@435: } duke@435: } duke@435: return 0; duke@435: } duke@435: duke@435: OSReturn os::set_native_priority(Thread* thread, int priority) { duke@435: if (!UseThreadPriorities) return OS_OK; duke@435: bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; duke@435: return ret ? OS_OK : OS_ERR; duke@435: } duke@435: duke@435: OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { duke@435: if ( !UseThreadPriorities ) { duke@435: *priority_ptr = java_to_os_priority[NormPriority]; duke@435: return OS_OK; duke@435: } duke@435: int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); duke@435: if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { duke@435: assert(false, "GetThreadPriority failed"); duke@435: return OS_ERR; duke@435: } duke@435: *priority_ptr = os_prio; duke@435: return OS_OK; duke@435: } duke@435: duke@435: duke@435: // Hint to the underlying OS that a task switch would not be good. duke@435: // Void return because it's a hint and can fail. duke@435: void os::hint_no_preempt() {} duke@435: duke@435: void os::interrupt(Thread* thread) { duke@435: assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), duke@435: "possibility of dangling Thread pointer"); duke@435: duke@435: OSThread* osthread = thread->osthread(); duke@435: osthread->set_interrupted(true); duke@435: // More than one thread can get here with the same value of osthread, duke@435: // resulting in multiple notifications. We do, however, want the store duke@435: // to interrupted() to be visible to other threads before we post duke@435: // the interrupt event. duke@435: OrderAccess::release(); duke@435: SetEvent(osthread->interrupt_event()); duke@435: // For JSR166: unpark after setting status duke@435: if (thread->is_Java_thread()) duke@435: ((JavaThread*)thread)->parker()->unpark(); duke@435: duke@435: ParkEvent * ev = thread->_ParkEvent ; duke@435: if (ev != NULL) ev->unpark() ; duke@435: duke@435: } duke@435: duke@435: duke@435: bool os::is_interrupted(Thread* thread, bool clear_interrupted) { duke@435: assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), duke@435: "possibility of dangling Thread pointer"); duke@435: duke@435: OSThread* osthread = thread->osthread(); duke@435: bool interrupted; duke@435: interrupted = osthread->interrupted(); duke@435: if (clear_interrupted == true) { duke@435: osthread->set_interrupted(false); duke@435: ResetEvent(osthread->interrupt_event()); duke@435: } // Otherwise leave the interrupted state alone duke@435: duke@435: return interrupted; duke@435: } duke@435: duke@435: // Get's a pc (hint) for a running thread. Currently used only for profiling. duke@435: ExtendedPC os::get_thread_pc(Thread* thread) { duke@435: CONTEXT context; duke@435: context.ContextFlags = CONTEXT_CONTROL; duke@435: HANDLE handle = thread->osthread()->thread_handle(); duke@435: #ifdef _M_IA64 duke@435: assert(0, "Fix get_thread_pc"); duke@435: return ExtendedPC(NULL); duke@435: #else duke@435: if (GetThreadContext(handle, &context)) { duke@435: #ifdef _M_AMD64 duke@435: return ExtendedPC((address) context.Rip); duke@435: #else duke@435: return ExtendedPC((address) context.Eip); duke@435: #endif duke@435: } else { duke@435: return ExtendedPC(NULL); duke@435: } duke@435: #endif duke@435: } duke@435: duke@435: // GetCurrentThreadId() returns DWORD duke@435: intx os::current_thread_id() { return GetCurrentThreadId(); } duke@435: duke@435: static int _initial_pid = 0; duke@435: duke@435: int os::current_process_id() duke@435: { duke@435: return (_initial_pid ? _initial_pid : _getpid()); duke@435: } duke@435: duke@435: int os::win32::_vm_page_size = 0; duke@435: int os::win32::_vm_allocation_granularity = 0; duke@435: int os::win32::_processor_type = 0; duke@435: // Processor level is not available on non-NT systems, use vm_version instead duke@435: int os::win32::_processor_level = 0; duke@435: julong os::win32::_physical_memory = 0; duke@435: size_t os::win32::_default_stack_size = 0; duke@435: duke@435: intx os::win32::_os_thread_limit = 0; duke@435: volatile intx os::win32::_os_thread_count = 0; duke@435: duke@435: bool os::win32::_is_nt = false; jmasa@824: bool os::win32::_is_windows_2003 = false; duke@435: duke@435: duke@435: void os::win32::initialize_system_info() { duke@435: SYSTEM_INFO si; duke@435: GetSystemInfo(&si); duke@435: _vm_page_size = si.dwPageSize; duke@435: _vm_allocation_granularity = si.dwAllocationGranularity; duke@435: _processor_type = si.dwProcessorType; duke@435: _processor_level = si.wProcessorLevel; phh@1558: set_processor_count(si.dwNumberOfProcessors); coleenp@912: poonam@1312: MEMORYSTATUSEX ms; poonam@1312: ms.dwLength = sizeof(ms); poonam@1312: duke@435: // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, duke@435: // dwMemoryLoad (% of memory in use) poonam@1312: GlobalMemoryStatusEx(&ms); poonam@1312: _physical_memory = ms.ullTotalPhys; duke@435: duke@435: OSVERSIONINFO oi; duke@435: oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); duke@435: GetVersionEx(&oi); duke@435: switch(oi.dwPlatformId) { duke@435: case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; jmasa@824: case VER_PLATFORM_WIN32_NT: jmasa@824: _is_nt = true; jmasa@824: { jmasa@824: int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; jmasa@824: if (os_vers == 5002) { jmasa@824: _is_windows_2003 = true; jmasa@824: } jmasa@824: } jmasa@824: break; duke@435: default: fatal("Unknown platform"); duke@435: } duke@435: duke@435: _default_stack_size = os::current_stack_size(); duke@435: assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); duke@435: assert((_default_stack_size & (_vm_page_size - 1)) == 0, duke@435: "stack size not a multiple of page size"); duke@435: duke@435: initialize_performance_counter(); duke@435: duke@435: // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is duke@435: // known to deadlock the system, if the VM issues to thread operations with duke@435: // a too high frequency, e.g., such as changing the priorities. duke@435: // The 6000 seems to work well - no deadlocks has been notices on the test duke@435: // programs that we have seen experience this problem. duke@435: if (!os::win32::is_nt()) { duke@435: StarvationMonitorInterval = 6000; duke@435: } duke@435: } duke@435: duke@435: duke@435: void os::win32::setmode_streams() { duke@435: _setmode(_fileno(stdin), _O_BINARY); duke@435: _setmode(_fileno(stdout), _O_BINARY); duke@435: _setmode(_fileno(stderr), _O_BINARY); duke@435: } duke@435: duke@435: duke@435: int os::message_box(const char* title, const char* message) { duke@435: int result = MessageBox(NULL, message, title, duke@435: MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); duke@435: return result == IDYES; duke@435: } duke@435: duke@435: int os::allocate_thread_local_storage() { duke@435: return TlsAlloc(); duke@435: } duke@435: duke@435: duke@435: void os::free_thread_local_storage(int index) { duke@435: TlsFree(index); duke@435: } duke@435: duke@435: duke@435: void os::thread_local_storage_at_put(int index, void* value) { duke@435: TlsSetValue(index, value); duke@435: assert(thread_local_storage_at(index) == value, "Just checking"); duke@435: } duke@435: duke@435: duke@435: void* os::thread_local_storage_at(int index) { duke@435: return TlsGetValue(index); duke@435: } duke@435: duke@435: duke@435: #ifndef PRODUCT duke@435: #ifndef _WIN64 duke@435: // Helpers to check whether NX protection is enabled duke@435: int nx_exception_filter(_EXCEPTION_POINTERS *pex) { duke@435: if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && duke@435: pex->ExceptionRecord->NumberParameters > 0 && duke@435: pex->ExceptionRecord->ExceptionInformation[0] == duke@435: EXCEPTION_INFO_EXEC_VIOLATION) { duke@435: return EXCEPTION_EXECUTE_HANDLER; duke@435: } duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: duke@435: void nx_check_protection() { duke@435: // If NX is enabled we'll get an exception calling into code on the stack duke@435: char code[] = { (char)0xC3 }; // ret duke@435: void *code_ptr = (void *)code; duke@435: __try { duke@435: __asm call code_ptr duke@435: } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { duke@435: tty->print_raw_cr("NX protection detected."); duke@435: } duke@435: } duke@435: #endif // _WIN64 duke@435: #endif // PRODUCT duke@435: duke@435: // this is called _before_ the global arguments have been parsed duke@435: void os::init(void) { duke@435: _initial_pid = _getpid(); duke@435: duke@435: init_random(1234567); duke@435: duke@435: win32::initialize_system_info(); duke@435: win32::setmode_streams(); duke@435: init_page_sizes((size_t) win32::vm_page_size()); duke@435: duke@435: // For better scalability on MP systems (must be called after initialize_system_info) duke@435: #ifndef PRODUCT duke@435: if (is_MP()) { duke@435: NoYieldsInMicrolock = true; duke@435: } duke@435: #endif jmasa@824: // This may be overridden later when argument processing is done. jmasa@824: FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, jmasa@824: os::win32::is_windows_2003()); jmasa@824: duke@435: // Initialize main_process and main_thread duke@435: main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle jmasa@824: if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, duke@435: &main_thread, THREAD_ALL_ACCESS, false, 0)) { duke@435: fatal("DuplicateHandle failed\n"); duke@435: } duke@435: main_thread_id = (int) GetCurrentThreadId(); duke@435: } duke@435: duke@435: // To install functions for atexit processing duke@435: extern "C" { duke@435: static void perfMemory_exit_helper() { duke@435: perfMemory_exit(); duke@435: } duke@435: } duke@435: duke@435: duke@435: // this is called _after_ the global arguments have been parsed duke@435: jint os::init_2(void) { duke@435: // Allocate a single page and mark it as readable for safepoint polling duke@435: address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); duke@435: guarantee( polling_page != NULL, "Reserve Failed for polling page"); duke@435: duke@435: address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); duke@435: guarantee( return_page != NULL, "Commit Failed for polling page"); duke@435: duke@435: os::set_polling_page( polling_page ); duke@435: duke@435: #ifndef PRODUCT duke@435: if( Verbose && PrintMiscellaneous ) duke@435: tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); duke@435: #endif duke@435: duke@435: if (!UseMembar) { coleenp@1091: address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE); duke@435: guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); duke@435: coleenp@1091: return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE); duke@435: guarantee( return_page != NULL, "Commit Failed for memory serialize page"); duke@435: duke@435: os::set_memory_serialize_page( mem_serialize_page ); duke@435: duke@435: #ifndef PRODUCT duke@435: if(Verbose && PrintMiscellaneous) duke@435: tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); duke@435: #endif duke@435: } duke@435: duke@435: FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); duke@435: duke@435: // Setup Windows Exceptions duke@435: duke@435: // On Itanium systems, Structured Exception Handling does not duke@435: // work since stack frames must be walkable by the OS. Since duke@435: // much of our code is dynamically generated, and we do not have duke@435: // proper unwind .xdata sections, the system simply exits duke@435: // rather than delivering the exception. To work around duke@435: // this we use VectorExceptions instead. duke@435: #ifdef _WIN64 duke@435: if (UseVectoredExceptions) { duke@435: topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter); duke@435: } duke@435: #endif duke@435: duke@435: // for debugging float code generation bugs duke@435: if (ForceFloatExceptions) { duke@435: #ifndef _WIN64 duke@435: static long fp_control_word = 0; duke@435: __asm { fstcw fp_control_word } duke@435: // see Intel PPro Manual, Vol. 2, p 7-16 duke@435: const long precision = 0x20; duke@435: const long underflow = 0x10; duke@435: const long overflow = 0x08; duke@435: const long zero_div = 0x04; duke@435: const long denorm = 0x02; duke@435: const long invalid = 0x01; duke@435: fp_control_word |= invalid; duke@435: __asm { fldcw fp_control_word } duke@435: #endif duke@435: } duke@435: duke@435: // Initialize HPI. duke@435: jint hpi_result = hpi::initialize(); duke@435: if (hpi_result != JNI_OK) { return hpi_result; } duke@435: duke@435: // If stack_commit_size is 0, windows will reserve the default size, duke@435: // but only commit a small portion of it. duke@435: size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); duke@435: size_t default_reserve_size = os::win32::default_stack_size(); duke@435: size_t actual_reserve_size = stack_commit_size; duke@435: if (stack_commit_size < default_reserve_size) { duke@435: // If stack_commit_size == 0, we want this too duke@435: actual_reserve_size = default_reserve_size; duke@435: } duke@435: duke@435: JavaThread::set_stack_size_at_create(stack_commit_size); duke@435: duke@435: // Calculate theoretical max. size of Threads to guard gainst artifical duke@435: // out-of-memory situations, where all available address-space has been duke@435: // reserved by thread stacks. duke@435: assert(actual_reserve_size != 0, "Must have a stack"); duke@435: duke@435: // Calculate the thread limit when we should start doing Virtual Memory duke@435: // banging. Currently when the threads will have used all but 200Mb of space. duke@435: // duke@435: // TODO: consider performing a similar calculation for commit size instead duke@435: // as reserve size, since on a 64-bit platform we'll run into that more duke@435: // often than running out of virtual memory space. We can use the duke@435: // lower value of the two calculations as the os_thread_limit. coleenp@548: size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); duke@435: win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); duke@435: duke@435: // at exit methods are called in the reverse order of their registration. duke@435: // there is no limit to the number of functions registered. atexit does duke@435: // not set errno. duke@435: duke@435: if (PerfAllowAtExitRegistration) { duke@435: // only register atexit functions if PerfAllowAtExitRegistration is set. duke@435: // atexit functions can be delayed until process exit time, which duke@435: // can be problematic for embedded VM situations. Embedded VMs should duke@435: // call DestroyJavaVM() to assure that VM resources are released. duke@435: duke@435: // note: perfMemory_exit_helper atexit function may be removed in duke@435: // the future if the appropriate cleanup code can be added to the duke@435: // VM_Exit VMOperation's doit method. duke@435: if (atexit(perfMemory_exit_helper) != 0) { duke@435: warning("os::init_2 atexit(perfMemory_exit_helper) failed"); duke@435: } duke@435: } duke@435: duke@435: // initialize PSAPI or ToolHelp for fatal error handler duke@435: if (win32::is_nt()) _init_psapi(); duke@435: else _init_toolhelp(); duke@435: duke@435: #ifndef _WIN64 duke@435: // Print something if NX is enabled (win32 on AMD64) duke@435: NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); duke@435: #endif duke@435: duke@435: // initialize thread priority policy duke@435: prio_init(); duke@435: iveresov@897: if (UseNUMA && !ForceNUMA) { iveresov@897: UseNUMA = false; // Currently unsupported. iveresov@897: } iveresov@897: duke@435: return JNI_OK; duke@435: } duke@435: duke@435: duke@435: // Mark the polling page as unreadable duke@435: void os::make_polling_page_unreadable(void) { duke@435: DWORD old_status; duke@435: if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) duke@435: fatal("Could not disable polling page"); duke@435: }; duke@435: duke@435: // Mark the polling page as readable duke@435: void os::make_polling_page_readable(void) { duke@435: DWORD old_status; duke@435: if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) duke@435: fatal("Could not enable polling page"); duke@435: }; duke@435: duke@435: duke@435: int os::stat(const char *path, struct stat *sbuf) { duke@435: char pathbuf[MAX_PATH]; duke@435: if (strlen(path) > MAX_PATH - 1) { duke@435: errno = ENAMETOOLONG; duke@435: return -1; duke@435: } duke@435: hpi::native_path(strcpy(pathbuf, path)); duke@435: int ret = ::stat(pathbuf, sbuf); duke@435: if (sbuf != NULL && UseUTCFileTimestamp) { duke@435: // Fix for 6539723. st_mtime returned from stat() is dependent on duke@435: // the system timezone and so can return different values for the duke@435: // same file if/when daylight savings time changes. This adjustment duke@435: // makes sure the same timestamp is returned regardless of the TZ. duke@435: // duke@435: // See: duke@435: // http://msdn.microsoft.com/library/ duke@435: // default.asp?url=/library/en-us/sysinfo/base/ duke@435: // time_zone_information_str.asp duke@435: // and duke@435: // http://msdn.microsoft.com/library/default.asp?url= duke@435: // /library/en-us/sysinfo/base/settimezoneinformation.asp duke@435: // duke@435: // NOTE: there is a insidious bug here: If the timezone is changed duke@435: // after the call to stat() but before 'GetTimeZoneInformation()', then duke@435: // the adjustment we do here will be wrong and we'll return the wrong duke@435: // value (which will likely end up creating an invalid class data duke@435: // archive). Absent a better API for this, or some time zone locking duke@435: // mechanism, we'll have to live with this risk. duke@435: TIME_ZONE_INFORMATION tz; duke@435: DWORD tzid = GetTimeZoneInformation(&tz); duke@435: int daylightBias = duke@435: (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; duke@435: sbuf->st_mtime += (tz.Bias + daylightBias) * 60; duke@435: } duke@435: return ret; duke@435: } duke@435: duke@435: duke@435: #define FT2INT64(ft) \ duke@435: ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) duke@435: duke@435: duke@435: // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) duke@435: // are used by JVM M&M and JVMTI to get user+sys or user CPU time duke@435: // of a thread. duke@435: // duke@435: // current_thread_cpu_time() and thread_cpu_time(Thread*) returns duke@435: // the fast estimate available on the platform. duke@435: duke@435: // current_thread_cpu_time() is not optimized for Windows yet duke@435: jlong os::current_thread_cpu_time() { duke@435: // return user + sys since the cost is the same duke@435: return os::thread_cpu_time(Thread::current(), true /* user+sys */); duke@435: } duke@435: duke@435: jlong os::thread_cpu_time(Thread* thread) { duke@435: // consistent with what current_thread_cpu_time() returns. duke@435: return os::thread_cpu_time(thread, true /* user+sys */); duke@435: } duke@435: duke@435: jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { duke@435: return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); duke@435: } duke@435: duke@435: jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { duke@435: // This code is copy from clasic VM -> hpi::sysThreadCPUTime duke@435: // If this function changes, os::is_thread_cpu_time_supported() should too duke@435: if (os::win32::is_nt()) { duke@435: FILETIME CreationTime; duke@435: FILETIME ExitTime; duke@435: FILETIME KernelTime; duke@435: FILETIME UserTime; duke@435: duke@435: if ( GetThreadTimes(thread->osthread()->thread_handle(), duke@435: &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) duke@435: return -1; duke@435: else duke@435: if (user_sys_cpu_time) { duke@435: return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; duke@435: } else { duke@435: return FT2INT64(UserTime) * 100; duke@435: } duke@435: } else { duke@435: return (jlong) timeGetTime() * 1000000; duke@435: } duke@435: } duke@435: duke@435: void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { duke@435: info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits duke@435: info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time duke@435: info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time duke@435: info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned duke@435: } duke@435: duke@435: void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { duke@435: info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits duke@435: info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time duke@435: info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time duke@435: info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned duke@435: } duke@435: duke@435: bool os::is_thread_cpu_time_supported() { duke@435: // see os::thread_cpu_time duke@435: if (os::win32::is_nt()) { duke@435: FILETIME CreationTime; duke@435: FILETIME ExitTime; duke@435: FILETIME KernelTime; duke@435: FILETIME UserTime; duke@435: duke@435: if ( GetThreadTimes(GetCurrentThread(), duke@435: &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) duke@435: return false; duke@435: else duke@435: return true; duke@435: } else { duke@435: return false; duke@435: } duke@435: } duke@435: duke@435: // Windows does't provide a loadavg primitive so this is stubbed out for now. duke@435: // It does have primitives (PDH API) to get CPU usage and run queue length. duke@435: // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" duke@435: // If we wanted to implement loadavg on Windows, we have a few options: duke@435: // duke@435: // a) Query CPU usage and run queue length and "fake" an answer by duke@435: // returning the CPU usage if it's under 100%, and the run queue duke@435: // length otherwise. It turns out that querying is pretty slow duke@435: // on Windows, on the order of 200 microseconds on a fast machine. duke@435: // Note that on the Windows the CPU usage value is the % usage duke@435: // since the last time the API was called (and the first call duke@435: // returns 100%), so we'd have to deal with that as well. duke@435: // duke@435: // b) Sample the "fake" answer using a sampling thread and store duke@435: // the answer in a global variable. The call to loadavg would duke@435: // just return the value of the global, avoiding the slow query. duke@435: // duke@435: // c) Sample a better answer using exponential decay to smooth the duke@435: // value. This is basically the algorithm used by UNIX kernels. duke@435: // duke@435: // Note that sampling thread starvation could affect both (b) and (c). duke@435: int os::loadavg(double loadavg[], int nelem) { duke@435: return -1; duke@435: } duke@435: duke@435: duke@435: // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() duke@435: bool os::dont_yield() { duke@435: return DontYieldALot; duke@435: } duke@435: duke@435: // Is a (classpath) directory empty? duke@435: bool os::dir_is_empty(const char* path) { duke@435: WIN32_FIND_DATA fd; duke@435: HANDLE f = FindFirstFile(path, &fd); duke@435: if (f == INVALID_HANDLE_VALUE) { duke@435: return true; duke@435: } duke@435: FindClose(f); duke@435: return false; duke@435: } duke@435: duke@435: // create binary file, rewriting existing file if required duke@435: int os::create_binary_file(const char* path, bool rewrite_existing) { duke@435: int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; duke@435: if (!rewrite_existing) { duke@435: oflags |= _O_EXCL; duke@435: } duke@435: return ::open(path, oflags, _S_IREAD | _S_IWRITE); duke@435: } duke@435: duke@435: // return current position of file pointer duke@435: jlong os::current_file_offset(int fd) { duke@435: return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); duke@435: } duke@435: duke@435: // move file pointer to the specified offset duke@435: jlong os::seek_to_file_offset(int fd, jlong offset) { duke@435: return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); duke@435: } duke@435: duke@435: duke@435: // Map a block of memory. duke@435: char* os::map_memory(int fd, const char* file_name, size_t file_offset, duke@435: char *addr, size_t bytes, bool read_only, duke@435: bool allow_exec) { duke@435: HANDLE hFile; duke@435: char* base; duke@435: duke@435: hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, duke@435: OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); duke@435: if (hFile == NULL) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("CreateFile() failed: GetLastError->%ld."); duke@435: } duke@435: return NULL; duke@435: } duke@435: duke@435: if (allow_exec) { duke@435: // CreateFileMapping/MapViewOfFileEx can't map executable memory duke@435: // unless it comes from a PE image (which the shared archive is not.) duke@435: // Even VirtualProtect refuses to give execute access to mapped memory duke@435: // that was not previously executable. duke@435: // duke@435: // Instead, stick the executable region in anonymous memory. Yuck. duke@435: // Penalty is that ~4 pages will not be shareable - in the future duke@435: // we might consider DLLizing the shared archive with a proper PE duke@435: // header so that mapping executable + sharing is possible. duke@435: duke@435: base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, duke@435: PAGE_READWRITE); duke@435: if (base == NULL) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); duke@435: } duke@435: CloseHandle(hFile); duke@435: return NULL; duke@435: } duke@435: duke@435: DWORD bytes_read; duke@435: OVERLAPPED overlapped; duke@435: overlapped.Offset = (DWORD)file_offset; duke@435: overlapped.OffsetHigh = 0; duke@435: overlapped.hEvent = NULL; duke@435: // ReadFile guarantees that if the return value is true, the requested duke@435: // number of bytes were read before returning. duke@435: bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; duke@435: if (!res) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); duke@435: } duke@435: release_memory(base, bytes); duke@435: CloseHandle(hFile); duke@435: return NULL; duke@435: } duke@435: } else { duke@435: HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, duke@435: NULL /*file_name*/); duke@435: if (hMap == NULL) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("CreateFileMapping() failed: GetLastError->%ld."); duke@435: } duke@435: CloseHandle(hFile); duke@435: return NULL; duke@435: } duke@435: duke@435: DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; duke@435: base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, duke@435: (DWORD)bytes, addr); duke@435: if (base == NULL) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); duke@435: } duke@435: CloseHandle(hMap); duke@435: CloseHandle(hFile); duke@435: return NULL; duke@435: } duke@435: duke@435: if (CloseHandle(hMap) == 0) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); duke@435: } duke@435: CloseHandle(hFile); duke@435: return base; duke@435: } duke@435: } duke@435: duke@435: if (allow_exec) { duke@435: DWORD old_protect; duke@435: DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; duke@435: bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; duke@435: duke@435: if (!res) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); duke@435: } duke@435: // Don't consider this a hard error, on IA32 even if the duke@435: // VirtualProtect fails, we should still be able to execute duke@435: CloseHandle(hFile); duke@435: return base; duke@435: } duke@435: } duke@435: duke@435: if (CloseHandle(hFile) == 0) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); duke@435: } duke@435: return base; duke@435: } duke@435: duke@435: return base; duke@435: } duke@435: duke@435: duke@435: // Remap a block of memory. duke@435: char* os::remap_memory(int fd, const char* file_name, size_t file_offset, duke@435: char *addr, size_t bytes, bool read_only, duke@435: bool allow_exec) { duke@435: // This OS does not allow existing memory maps to be remapped so we duke@435: // have to unmap the memory before we remap it. duke@435: if (!os::unmap_memory(addr, bytes)) { duke@435: return NULL; duke@435: } duke@435: duke@435: // There is a very small theoretical window between the unmap_memory() duke@435: // call above and the map_memory() call below where a thread in native duke@435: // code may be able to access an address that is no longer mapped. duke@435: duke@435: return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, duke@435: allow_exec); duke@435: } duke@435: duke@435: duke@435: // Unmap a block of memory. duke@435: // Returns true=success, otherwise false. duke@435: duke@435: bool os::unmap_memory(char* addr, size_t bytes) { duke@435: BOOL result = UnmapViewOfFile(addr); duke@435: if (result == 0) { duke@435: if (PrintMiscellaneous && Verbose) { duke@435: DWORD err = GetLastError(); duke@435: tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); duke@435: } duke@435: return false; duke@435: } duke@435: return true; duke@435: } duke@435: duke@435: void os::pause() { duke@435: char filename[MAX_PATH]; duke@435: if (PauseAtStartupFile && PauseAtStartupFile[0]) { duke@435: jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); duke@435: } else { duke@435: jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); duke@435: } duke@435: duke@435: int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); duke@435: if (fd != -1) { duke@435: struct stat buf; duke@435: close(fd); duke@435: while (::stat(filename, &buf) == 0) { duke@435: Sleep(100); duke@435: } duke@435: } else { duke@435: jio_fprintf(stderr, duke@435: "Could not open pause file '%s', continuing immediately.\n", filename); duke@435: } duke@435: } duke@435: duke@435: // An Event wraps a win32 "CreateEvent" kernel handle. duke@435: // duke@435: // We have a number of choices regarding "CreateEvent" win32 handle leakage: duke@435: // duke@435: // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle duke@435: // field, and call CloseHandle() on the win32 event handle. Unpark() would duke@435: // need to be modified to tolerate finding a NULL (invalid) win32 event handle. duke@435: // In addition, an unpark() operation might fetch the handle field, but the duke@435: // event could recycle between the fetch and the SetEvent() operation. duke@435: // SetEvent() would either fail because the handle was invalid, or inadvertently work, duke@435: // as the win32 handle value had been recycled. In an ideal world calling SetEvent() duke@435: // on an stale but recycled handle would be harmless, but in practice this might duke@435: // confuse other non-Sun code, so it's not a viable approach. duke@435: // duke@435: // 2: Once a win32 event handle is associated with an Event, it remains associated duke@435: // with the Event. The event handle is never closed. This could be construed duke@435: // as handle leakage, but only up to the maximum # of threads that have been extant duke@435: // at any one time. This shouldn't be an issue, as windows platforms typically duke@435: // permit a process to have hundreds of thousands of open handles. duke@435: // duke@435: // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList duke@435: // and release unused handles. duke@435: // duke@435: // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. duke@435: // It's not clear, however, that we wouldn't be trading one type of leak for another. duke@435: // duke@435: // 5. Use an RCU-like mechanism (Read-Copy Update). duke@435: // Or perhaps something similar to Maged Michael's "Hazard pointers". duke@435: // duke@435: // We use (2). duke@435: // duke@435: // TODO-FIXME: duke@435: // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. duke@435: // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks duke@435: // to recover from (or at least detect) the dreaded Windows 841176 bug. duke@435: // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent duke@435: // into a single win32 CreateEvent() handle. duke@435: // duke@435: // _Event transitions in park() duke@435: // -1 => -1 : illegal duke@435: // 1 => 0 : pass - return immediately duke@435: // 0 => -1 : block duke@435: // duke@435: // _Event serves as a restricted-range semaphore : duke@435: // -1 : thread is blocked duke@435: // 0 : neutral - thread is running or ready duke@435: // 1 : signaled - thread is running or ready duke@435: // duke@435: // Another possible encoding of _Event would be duke@435: // with explicit "PARKED" and "SIGNALED" bits. duke@435: duke@435: int os::PlatformEvent::park (jlong Millis) { duke@435: guarantee (_ParkHandle != NULL , "Invariant") ; duke@435: guarantee (Millis > 0 , "Invariant") ; duke@435: int v ; duke@435: duke@435: // CONSIDER: defer assigning a CreateEvent() handle to the Event until duke@435: // the initial park() operation. duke@435: duke@435: for (;;) { duke@435: v = _Event ; duke@435: if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; duke@435: } duke@435: guarantee ((v == 0) || (v == 1), "invariant") ; duke@435: if (v != 0) return OS_OK ; duke@435: duke@435: // Do this the hard way by blocking ... duke@435: // TODO: consider a brief spin here, gated on the success of recent duke@435: // spin attempts by this thread. duke@435: // duke@435: // We decompose long timeouts into series of shorter timed waits. duke@435: // Evidently large timo values passed in WaitForSingleObject() are problematic on some duke@435: // versions of Windows. See EventWait() for details. This may be superstition. Or not. duke@435: // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time duke@435: // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from duke@435: // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend duke@435: // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == duke@435: // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate duke@435: // for the already waited time. This policy does not admit any new outcomes. duke@435: // In the future, however, we might want to track the accumulated wait time and duke@435: // adjust Millis accordingly if we encounter a spurious wakeup. duke@435: duke@435: const int MAXTIMEOUT = 0x10000000 ; duke@435: DWORD rv = WAIT_TIMEOUT ; duke@435: while (_Event < 0 && Millis > 0) { duke@435: DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) duke@435: if (Millis > MAXTIMEOUT) { duke@435: prd = MAXTIMEOUT ; duke@435: } duke@435: rv = ::WaitForSingleObject (_ParkHandle, prd) ; duke@435: assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; duke@435: if (rv == WAIT_TIMEOUT) { duke@435: Millis -= prd ; duke@435: } duke@435: } duke@435: v = _Event ; duke@435: _Event = 0 ; duke@435: OrderAccess::fence() ; duke@435: // If we encounter a nearly simultanous timeout expiry and unpark() duke@435: // we return OS_OK indicating we awoke via unpark(). duke@435: // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. duke@435: return (v >= 0) ? OS_OK : OS_TIMEOUT ; duke@435: } duke@435: duke@435: void os::PlatformEvent::park () { duke@435: guarantee (_ParkHandle != NULL, "Invariant") ; duke@435: // Invariant: Only the thread associated with the Event/PlatformEvent duke@435: // may call park(). duke@435: int v ; duke@435: for (;;) { duke@435: v = _Event ; duke@435: if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; duke@435: } duke@435: guarantee ((v == 0) || (v == 1), "invariant") ; duke@435: if (v != 0) return ; duke@435: duke@435: // Do this the hard way by blocking ... duke@435: // TODO: consider a brief spin here, gated on the success of recent duke@435: // spin attempts by this thread. duke@435: while (_Event < 0) { duke@435: DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; duke@435: assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; duke@435: } duke@435: duke@435: // Usually we'll find _Event == 0 at this point, but as duke@435: // an optional optimization we clear it, just in case can duke@435: // multiple unpark() operations drove _Event up to 1. duke@435: _Event = 0 ; duke@435: OrderAccess::fence() ; duke@435: guarantee (_Event >= 0, "invariant") ; duke@435: } duke@435: duke@435: void os::PlatformEvent::unpark() { duke@435: guarantee (_ParkHandle != NULL, "Invariant") ; duke@435: int v ; duke@435: for (;;) { duke@435: v = _Event ; // Increment _Event if it's < 1. duke@435: if (v > 0) { duke@435: // If it's already signaled just return. duke@435: // The LD of _Event could have reordered or be satisfied duke@435: // by a read-aside from this processor's write buffer. duke@435: // To avoid problems execute a barrier and then duke@435: // ratify the value. A degenerate CAS() would also work. duke@435: // Viz., CAS (v+0, &_Event, v) == v). duke@435: OrderAccess::fence() ; duke@435: if (_Event == v) return ; duke@435: continue ; duke@435: } duke@435: if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; duke@435: } duke@435: if (v < 0) { duke@435: ::SetEvent (_ParkHandle) ; duke@435: } duke@435: } duke@435: duke@435: duke@435: // JSR166 duke@435: // ------------------------------------------------------- duke@435: duke@435: /* duke@435: * The Windows implementation of Park is very straightforward: Basic duke@435: * operations on Win32 Events turn out to have the right semantics to duke@435: * use them directly. We opportunistically resuse the event inherited duke@435: * from Monitor. duke@435: */ duke@435: duke@435: duke@435: void Parker::park(bool isAbsolute, jlong time) { duke@435: guarantee (_ParkEvent != NULL, "invariant") ; duke@435: // First, demultiplex/decode time arguments duke@435: if (time < 0) { // don't wait duke@435: return; duke@435: } duke@435: else if (time == 0) { duke@435: time = INFINITE; duke@435: } duke@435: else if (isAbsolute) { duke@435: time -= os::javaTimeMillis(); // convert to relative time duke@435: if (time <= 0) // already elapsed duke@435: return; duke@435: } duke@435: else { // relative duke@435: time /= 1000000; // Must coarsen from nanos to millis duke@435: if (time == 0) // Wait for the minimal time unit if zero duke@435: time = 1; duke@435: } duke@435: duke@435: JavaThread* thread = (JavaThread*)(Thread::current()); duke@435: assert(thread->is_Java_thread(), "Must be JavaThread"); duke@435: JavaThread *jt = (JavaThread *)thread; duke@435: duke@435: // Don't wait if interrupted or already triggered duke@435: if (Thread::is_interrupted(thread, false) || duke@435: WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { duke@435: ResetEvent(_ParkEvent); duke@435: return; duke@435: } duke@435: else { duke@435: ThreadBlockInVM tbivm(jt); duke@435: OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); duke@435: jt->set_suspend_equivalent(); duke@435: duke@435: WaitForSingleObject(_ParkEvent, time); duke@435: ResetEvent(_ParkEvent); duke@435: duke@435: // If externally suspended while waiting, re-suspend duke@435: if (jt->handle_special_suspend_equivalent_condition()) { duke@435: jt->java_suspend_self(); duke@435: } duke@435: } duke@435: } duke@435: duke@435: void Parker::unpark() { duke@435: guarantee (_ParkEvent != NULL, "invariant") ; duke@435: SetEvent(_ParkEvent); duke@435: } duke@435: duke@435: // Run the specified command in a separate process. Return its exit value, duke@435: // or -1 on failure (e.g. can't create a new process). duke@435: int os::fork_and_exec(char* cmd) { duke@435: STARTUPINFO si; duke@435: PROCESS_INFORMATION pi; duke@435: duke@435: memset(&si, 0, sizeof(si)); duke@435: si.cb = sizeof(si); duke@435: memset(&pi, 0, sizeof(pi)); duke@435: BOOL rslt = CreateProcess(NULL, // executable name - use command line duke@435: cmd, // command line duke@435: NULL, // process security attribute duke@435: NULL, // thread security attribute duke@435: TRUE, // inherits system handles duke@435: 0, // no creation flags duke@435: NULL, // use parent's environment block duke@435: NULL, // use parent's starting directory duke@435: &si, // (in) startup information duke@435: &pi); // (out) process information duke@435: duke@435: if (rslt) { duke@435: // Wait until child process exits. duke@435: WaitForSingleObject(pi.hProcess, INFINITE); duke@435: duke@435: DWORD exit_code; duke@435: GetExitCodeProcess(pi.hProcess, &exit_code); duke@435: duke@435: // Close process and thread handles. duke@435: CloseHandle(pi.hProcess); duke@435: CloseHandle(pi.hThread); duke@435: duke@435: return (int)exit_code; duke@435: } else { duke@435: return -1; duke@435: } duke@435: } duke@435: duke@435: //-------------------------------------------------------------------------------------------------- duke@435: // Non-product code duke@435: duke@435: static int mallocDebugIntervalCounter = 0; duke@435: static int mallocDebugCounter = 0; duke@435: bool os::check_heap(bool force) { duke@435: if (++mallocDebugCounter < MallocVerifyStart && !force) return true; duke@435: if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { duke@435: // Note: HeapValidate executes two hardware breakpoints when it finds something duke@435: // wrong; at these points, eax contains the address of the offending block (I think). duke@435: // To get to the exlicit error message(s) below, just continue twice. duke@435: HANDLE heap = GetProcessHeap(); duke@435: { HeapLock(heap); duke@435: PROCESS_HEAP_ENTRY phe; duke@435: phe.lpData = NULL; duke@435: while (HeapWalk(heap, &phe) != 0) { duke@435: if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && duke@435: !HeapValidate(heap, 0, phe.lpData)) { duke@435: tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); duke@435: tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); duke@435: fatal("corrupted C heap"); duke@435: } duke@435: } duke@435: int err = GetLastError(); duke@435: if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { jcoomes@1845: fatal(err_msg("heap walk aborted with error %d", err)); duke@435: } duke@435: HeapUnlock(heap); duke@435: } duke@435: mallocDebugIntervalCounter = 0; duke@435: } duke@435: return true; duke@435: } duke@435: duke@435: duke@435: #ifndef PRODUCT duke@435: bool os::find(address addr) { duke@435: // Nothing yet duke@435: return false; duke@435: } duke@435: #endif duke@435: duke@435: LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { duke@435: DWORD exception_code = e->ExceptionRecord->ExceptionCode; duke@435: duke@435: if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { duke@435: JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); duke@435: PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; duke@435: address addr = (address) exceptionRecord->ExceptionInformation[1]; duke@435: duke@435: if (os::is_memory_serialize_page(thread, addr)) duke@435: return EXCEPTION_CONTINUE_EXECUTION; duke@435: } duke@435: duke@435: return EXCEPTION_CONTINUE_SEARCH; duke@435: } duke@435: duke@435: static int getLastErrorString(char *buf, size_t len) duke@435: { duke@435: long errval; duke@435: duke@435: if ((errval = GetLastError()) != 0) duke@435: { duke@435: /* DOS error */ duke@435: size_t n = (size_t)FormatMessage( duke@435: FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, duke@435: NULL, duke@435: errval, duke@435: 0, duke@435: buf, duke@435: (DWORD)len, duke@435: NULL); duke@435: if (n > 3) { duke@435: /* Drop final '.', CR, LF */ duke@435: if (buf[n - 1] == '\n') n--; duke@435: if (buf[n - 1] == '\r') n--; duke@435: if (buf[n - 1] == '.') n--; duke@435: buf[n] = '\0'; duke@435: } duke@435: return (int)n; duke@435: } duke@435: duke@435: if (errno != 0) duke@435: { duke@435: /* C runtime error that has no corresponding DOS error code */ duke@435: const char *s = strerror(errno); duke@435: size_t n = strlen(s); duke@435: if (n >= len) n = len - 1; duke@435: strncpy(buf, s, n); duke@435: buf[n] = '\0'; duke@435: return (int)n; duke@435: } duke@435: return 0; duke@435: }