/hotspot/src/os/windows/vm/os_windows.cpp
C++ | 4760 lines | 3219 code | 644 blank | 897 comment | 805 complexity | bd0a29115bdf310e6738b41a729e50c5 MD5 | raw file
Possible License(s): LGPL-3.0, GPL-2.0, BSD-3-Clause-No-Nuclear-License-2014, BSD-3-Clause
- /*
- * CopyrighT (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
- #ifdef _WIN64
- // Must be at least Windows 2000 or XP to use VectoredExceptions
- #define _WIN32_WINNT 0x500
- #endif
- // no precompiled headers
- #include "classfile/classLoader.hpp"
- #include "classfile/systemDictionary.hpp"
- #include "classfile/vmSymbols.hpp"
- #include "code/icBuffer.hpp"
- #include "code/vtableStubs.hpp"
- #include "compiler/compileBroker.hpp"
- #include "interpreter/interpreter.hpp"
- #include "jvm_windows.h"
- #include "memory/allocation.inline.hpp"
- #include "memory/filemap.hpp"
- #include "mutex_windows.inline.hpp"
- #include "oops/oop.inline.hpp"
- #include "os_share_windows.hpp"
- #include "prims/jniFastGetField.hpp"
- #include "prims/jvm.h"
- #include "prims/jvm_misc.hpp"
- #include "runtime/arguments.hpp"
- #include "runtime/extendedPC.hpp"
- #include "runtime/globals.hpp"
- #include "runtime/interfaceSupport.hpp"
- #include "runtime/java.hpp"
- #include "runtime/javaCalls.hpp"
- #include "runtime/mutexLocker.hpp"
- #include "runtime/objectMonitor.hpp"
- #include "runtime/osThread.hpp"
- #include "runtime/perfMemory.hpp"
- #include "runtime/sharedRuntime.hpp"
- #include "runtime/statSampler.hpp"
- #include "runtime/stubRoutines.hpp"
- #include "runtime/threadCritical.hpp"
- #include "runtime/timer.hpp"
- #include "services/attachListener.hpp"
- #include "services/runtimeService.hpp"
- #include "thread_windows.inline.hpp"
- #include "utilities/decoder.hpp"
- #include "utilities/defaultStream.hpp"
- #include "utilities/events.hpp"
- #include "utilities/growableArray.hpp"
- #include "utilities/vmError.hpp"
- #ifdef TARGET_ARCH_x86
- # include "assembler_x86.inline.hpp"
- # include "nativeInst_x86.hpp"
- #endif
- #ifdef COMPILER1
- #include "c1/c1_Runtime1.hpp"
- #endif
- #ifdef COMPILER2
- #include "opto/runtime.hpp"
- #endif
- #ifdef _DEBUG
- #include <crtdbg.h>
- #endif
- #include <windows.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/timeb.h>
- #include <objidl.h>
- #include <shlobj.h>
- #include <malloc.h>
- #include <signal.h>
- #include <direct.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <io.h>
- #include <process.h> // For _beginthreadex(), _endthreadex()
- #include <imagehlp.h> // For os::dll_address_to_function_name
- /* for enumerating dll libraries */
- #include <tlhelp32.h>
- #include <vdmdbg.h>
- // for timer info max values which include all bits
- #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
- // For DLL loading/load error detection
- // Values of PE COFF
- #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c
- #define IMAGE_FILE_SIGNATURE_LENGTH 4
- static HANDLE main_process;
- static HANDLE main_thread;
- static int main_thread_id;
- static FILETIME process_creation_time;
- static FILETIME process_exit_time;
- static FILETIME process_user_time;
- static FILETIME process_kernel_time;
- #ifdef _WIN64
- PVOID topLevelVectoredExceptionHandler = NULL;
- #endif
- #ifdef _M_IA64
- #define __CPU__ ia64
- #elif _M_AMD64
- #define __CPU__ amd64
- #else
- #define __CPU__ i486
- #endif
- // save DLL module handle, used by GetModuleFileName
- HINSTANCE vm_lib_handle;
- static int getLastErrorString(char *buf, size_t len);
- BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
- switch (reason) {
- case DLL_PROCESS_ATTACH:
- vm_lib_handle = hinst;
- if(ForceTimeHighResolution)
- timeBeginPeriod(1L);
- break;
- case DLL_PROCESS_DETACH:
- if(ForceTimeHighResolution)
- timeEndPeriod(1L);
- #ifdef _WIN64
- if (topLevelVectoredExceptionHandler != NULL) {
- RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler);
- topLevelVectoredExceptionHandler = NULL;
- }
- #endif
- break;
- default:
- break;
- }
- return true;
- }
- static inline double fileTimeAsDouble(FILETIME* time) {
- const double high = (double) ((unsigned int) ~0);
- const double split = 10000000.0;
- double result = (time->dwLowDateTime / split) +
- time->dwHighDateTime * (high/split);
- return result;
- }
- // Implementation of os
- bool os::getenv(const char* name, char* buffer, int len) {
- int result = GetEnvironmentVariable(name, buffer, len);
- return result > 0 && result < len;
- }
- // No setuid programs under Windows.
- bool os::have_special_privileges() {
- return false;
- }
- // This method is a periodic task to check for misbehaving JNI applications
- // under CheckJNI, we can add any periodic checks here.
- // For Windows at the moment does nothing
- void os::run_periodic_checks() {
- return;
- }
- #ifndef _WIN64
- // previous UnhandledExceptionFilter, if there is one
- static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL;
- LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo);
- #endif
- void os::init_system_properties_values() {
- /* sysclasspath, java_home, dll_dir */
- {
- char *home_path;
- char *dll_path;
- char *pslash;
- char *bin = "\\bin";
- char home_dir[MAX_PATH];
- if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) {
- os::jvm_path(home_dir, sizeof(home_dir));
- // Found the full path to jvm[_g].dll.
- // Now cut the path to <java_home>/jre if we can.
- *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */
- pslash = strrchr(home_dir, '\\');
- if (pslash != NULL) {
- *pslash = '\0'; /* get rid of \{client|server} */
- pslash = strrchr(home_dir, '\\');
- if (pslash != NULL)
- *pslash = '\0'; /* get rid of \bin */
- }
- }
- home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1);
- if (home_path == NULL)
- return;
- strcpy(home_path, home_dir);
- Arguments::set_java_home(home_path);
- dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1);
- if (dll_path == NULL)
- return;
- strcpy(dll_path, home_dir);
- strcat(dll_path, bin);
- Arguments::set_dll_dir(dll_path);
- if (!set_boot_path('\\', ';'))
- return;
- }
- /* library_path */
- #define EXT_DIR "\\lib\\ext"
- #define BIN_DIR "\\bin"
- #define PACKAGE_DIR "\\Sun\\Java"
- {
- /* Win32 library search order (See the documentation for LoadLibrary):
- *
- * 1. The directory from which application is loaded.
- * 2. The current directory
- * 3. The system wide Java Extensions directory (Java only)
- * 4. System directory (GetSystemDirectory)
- * 5. Windows directory (GetWindowsDirectory)
- * 6. The PATH environment variable
- */
- char *library_path;
- char tmp[MAX_PATH];
- char *path_str = ::getenv("PATH");
- library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) +
- sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10);
- library_path[0] = '\0';
- GetModuleFileName(NULL, tmp, sizeof(tmp));
- *(strrchr(tmp, '\\')) = '\0';
- strcat(library_path, tmp);
- strcat(library_path, ";.");
- GetWindowsDirectory(tmp, sizeof(tmp));
- strcat(library_path, ";");
- strcat(library_path, tmp);
- strcat(library_path, PACKAGE_DIR BIN_DIR);
- GetSystemDirectory(tmp, sizeof(tmp));
- strcat(library_path, ";");
- strcat(library_path, tmp);
- GetWindowsDirectory(tmp, sizeof(tmp));
- strcat(library_path, ";");
- strcat(library_path, tmp);
- if (path_str) {
- strcat(library_path, ";");
- strcat(library_path, path_str);
- }
- Arguments::set_library_path(library_path);
- FREE_C_HEAP_ARRAY(char, library_path);
- }
- /* Default extensions directory */
- {
- char path[MAX_PATH];
- char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1];
- GetWindowsDirectory(path, MAX_PATH);
- sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR,
- path, PACKAGE_DIR, EXT_DIR);
- Arguments::set_ext_dirs(buf);
- }
- #undef EXT_DIR
- #undef BIN_DIR
- #undef PACKAGE_DIR
- /* Default endorsed standards directory. */
- {
- #define ENDORSED_DIR "\\lib\\endorsed"
- size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR);
- char * buf = NEW_C_HEAP_ARRAY(char, len);
- sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR);
- Arguments::set_endorsed_dirs(buf);
- #undef ENDORSED_DIR
- }
- #ifndef _WIN64
- // set our UnhandledExceptionFilter and save any previous one
- prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception);
- #endif
- // Done
- return;
- }
- void os::breakpoint() {
- DebugBreak();
- }
- // Invoked from the BREAKPOINT Macro
- extern "C" void breakpoint() {
- os::breakpoint();
- }
- // Returns an estimate of the current stack pointer. Result must be guaranteed
- // to point into the calling threads stack, and be no lower than the current
- // stack pointer.
- address os::current_stack_pointer() {
- int dummy;
- address sp = (address)&dummy;
- return sp;
- }
- // os::current_stack_base()
- //
- // Returns the base of the stack, which is the stack's
- // starting address. This function must be called
- // while running on the stack of the thread being queried.
- address os::current_stack_base() {
- MEMORY_BASIC_INFORMATION minfo;
- address stack_bottom;
- size_t stack_size;
- VirtualQuery(&minfo, &minfo, sizeof(minfo));
- stack_bottom = (address)minfo.AllocationBase;
- stack_size = minfo.RegionSize;
- // Add up the sizes of all the regions with the same
- // AllocationBase.
- while( 1 )
- {
- VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo));
- if ( stack_bottom == (address)minfo.AllocationBase )
- stack_size += minfo.RegionSize;
- else
- break;
- }
- #ifdef _M_IA64
- // IA64 has memory and register stacks
- stack_size = stack_size / 2;
- #endif
- return stack_bottom + stack_size;
- }
- size_t os::current_stack_size() {
- size_t sz;
- MEMORY_BASIC_INFORMATION minfo;
- VirtualQuery(&minfo, &minfo, sizeof(minfo));
- sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
- return sz;
- }
- struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
- const struct tm* time_struct_ptr = localtime(clock);
- if (time_struct_ptr != NULL) {
- *res = *time_struct_ptr;
- return res;
- }
- return NULL;
- }
- LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo);
- // Thread start routine for all new Java threads
- static unsigned __stdcall java_start(Thread* thread) {
- // Try to randomize the cache line index of hot stack frames.
- // This helps when threads of the same stack traces evict each other's
- // cache lines. The threads can be either from the same JVM instance, or
- // from different JVM instances. The benefit is especially true for
- // processors with hyperthreading technology.
- static int counter = 0;
- int pid = os::current_process_id();
- _alloca(((pid ^ counter++) & 7) * 128);
- OSThread* osthr = thread->osthread();
- assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
- if (UseNUMA) {
- int lgrp_id = os::numa_get_group_id();
- if (lgrp_id != -1) {
- thread->set_lgrp_id(lgrp_id);
- }
- }
- if (UseVectoredExceptions) {
- // If we are using vectored exception we don't need to set a SEH
- thread->run();
- }
- else {
- // Install a win32 structured exception handler around every thread created
- // by VM, so VM can genrate error dump when an exception occurred in non-
- // Java thread (e.g. VM thread).
- __try {
- thread->run();
- } __except(topLevelExceptionFilter(
- (_EXCEPTION_POINTERS*)_exception_info())) {
- // Nothing to do.
- }
- }
- // One less thread is executing
- // When the VMThread gets here, the main thread may have already exited
- // which frees the CodeHeap containing the Atomic::add code
- if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
- Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count);
- }
- return 0;
- }
- static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) {
- // Allocate the OSThread object
- OSThread* osthread = new OSThread(NULL, NULL);
- if (osthread == NULL) return NULL;
- // Initialize support for Java interrupts
- HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
- if (interrupt_event == NULL) {
- delete osthread;
- return NULL;
- }
- osthread->set_interrupt_event(interrupt_event);
- // Store info on the Win32 thread into the OSThread
- osthread->set_thread_handle(thread_handle);
- osthread->set_thread_id(thread_id);
- if (UseNUMA) {
- int lgrp_id = os::numa_get_group_id();
- if (lgrp_id != -1) {
- thread->set_lgrp_id(lgrp_id);
- }
- }
- // Initial thread state is INITIALIZED, not SUSPENDED
- osthread->set_state(INITIALIZED);
- return osthread;
- }
- bool os::create_attached_thread(JavaThread* thread) {
- #ifdef ASSERT
- thread->verify_not_published();
- #endif
- HANDLE thread_h;
- if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(),
- &thread_h, THREAD_ALL_ACCESS, false, 0)) {
- fatal("DuplicateHandle failed\n");
- }
- OSThread* osthread = create_os_thread(thread, thread_h,
- (int)current_thread_id());
- if (osthread == NULL) {
- return false;
- }
- // Initial thread state is RUNNABLE
- osthread->set_state(RUNNABLE);
- thread->set_osthread(osthread);
- return true;
- }
- bool os::create_main_thread(JavaThread* thread) {
- #ifdef ASSERT
- thread->verify_not_published();
- #endif
- if (_starting_thread == NULL) {
- _starting_thread = create_os_thread(thread, main_thread, main_thread_id);
- if (_starting_thread == NULL) {
- return false;
- }
- }
- // The primordial thread is runnable from the start)
- _starting_thread->set_state(RUNNABLE);
- thread->set_osthread(_starting_thread);
- return true;
- }
- // Allocate and initialize a new OSThread
- bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
- unsigned thread_id;
- // Allocate the OSThread object
- OSThread* osthread = new OSThread(NULL, NULL);
- if (osthread == NULL) {
- return false;
- }
- // Initialize support for Java interrupts
- HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
- if (interrupt_event == NULL) {
- delete osthread;
- return NULL;
- }
- osthread->set_interrupt_event(interrupt_event);
- osthread->set_interrupted(false);
- thread->set_osthread(osthread);
- if (stack_size == 0) {
- switch (thr_type) {
- case os::java_thread:
- // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
- if (JavaThread::stack_size_at_create() > 0)
- stack_size = JavaThread::stack_size_at_create();
- break;
- case os::compiler_thread:
- if (CompilerThreadStackSize > 0) {
- stack_size = (size_t)(CompilerThreadStackSize * K);
- break;
- } // else fall through:
- // use VMThreadStackSize if CompilerThreadStackSize is not defined
- case os::vm_thread:
- case os::pgc_thread:
- case os::cgc_thread:
- case os::watcher_thread:
- if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
- break;
- }
- }
- // Create the Win32 thread
- //
- // Contrary to what MSDN document says, "stack_size" in _beginthreadex()
- // does not specify stack size. Instead, it specifies the size of
- // initially committed space. The stack size is determined by
- // PE header in the executable. If the committed "stack_size" is larger
- // than default value in the PE header, the stack is rounded up to the
- // nearest multiple of 1MB. For example if the launcher has default
- // stack size of 320k, specifying any size less than 320k does not
- // affect the actual stack size at all, it only affects the initial
- // commitment. On the other hand, specifying 'stack_size' larger than
- // default value may cause significant increase in memory usage, because
- // not only the stack space will be rounded up to MB, but also the
- // entire space is committed upfront.
- //
- // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION'
- // for CreateThread() that can treat 'stack_size' as stack size. However we
- // are not supposed to call CreateThread() directly according to MSDN
- // document because JVM uses C runtime library. The good news is that the
- // flag appears to work with _beginthredex() as well.
- #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
- #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000)
- #endif
- HANDLE thread_handle =
- (HANDLE)_beginthreadex(NULL,
- (unsigned)stack_size,
- (unsigned (__stdcall *)(void*)) java_start,
- thread,
- CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION,
- &thread_id);
- if (thread_handle == NULL) {
- // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again
- // without the flag.
- thread_handle =
- (HANDLE)_beginthreadex(NULL,
- (unsigned)stack_size,
- (unsigned (__stdcall *)(void*)) java_start,
- thread,
- CREATE_SUSPENDED,
- &thread_id);
- }
- if (thread_handle == NULL) {
- // Need to clean up stuff we've allocated so far
- CloseHandle(osthread->interrupt_event());
- thread->set_osthread(NULL);
- delete osthread;
- return NULL;
- }
- Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count);
- // Store info on the Win32 thread into the OSThread
- osthread->set_thread_handle(thread_handle);
- osthread->set_thread_id(thread_id);
- // Initial thread state is INITIALIZED, not SUSPENDED
- osthread->set_state(INITIALIZED);
- // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
- return true;
- }
- // Free Win32 resources related to the OSThread
- void os::free_thread(OSThread* osthread) {
- assert(osthread != NULL, "osthread not set");
- CloseHandle(osthread->thread_handle());
- CloseHandle(osthread->interrupt_event());
- delete osthread;
- }
- static int has_performance_count = 0;
- static jlong first_filetime;
- static jlong initial_performance_count;
- static jlong performance_frequency;
- jlong as_long(LARGE_INTEGER x) {
- jlong result = 0; // initialization to avoid warning
- set_high(&result, x.HighPart);
- set_low(&result, x.LowPart);
- return result;
- }
- jlong os::elapsed_counter() {
- LARGE_INTEGER count;
- if (has_performance_count) {
- QueryPerformanceCounter(&count);
- return as_long(count) - initial_performance_count;
- } else {
- FILETIME wt;
- GetSystemTimeAsFileTime(&wt);
- return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime);
- }
- }
- jlong os::elapsed_frequency() {
- if (has_performance_count) {
- return performance_frequency;
- } else {
- // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
- return 10000000;
- }
- }
- julong os::available_memory() {
- return win32::available_memory();
- }
- julong os::win32::available_memory() {
- // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
- // value if total memory is larger than 4GB
- MEMORYSTATUSEX ms;
- ms.dwLength = sizeof(ms);
- GlobalMemoryStatusEx(&ms);
- return (julong)ms.ullAvailPhys;
- }
- julong os::physical_memory() {
- return win32::physical_memory();
- }
- julong os::allocatable_physical_memory(julong size) {
- #ifdef _LP64
- return size;
- #else
- // Limit to 1400m because of the 2gb address space wall
- return MIN2(size, (julong)1400*M);
- #endif
- }
- // VC6 lacks DWORD_PTR
- #if _MSC_VER < 1300
- typedef UINT_PTR DWORD_PTR;
- #endif
- int os::active_processor_count() {
- DWORD_PTR lpProcessAffinityMask = 0;
- DWORD_PTR lpSystemAffinityMask = 0;
- int proc_count = processor_count();
- if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
- GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {
- // Nof active processors is number of bits in process affinity mask
- int bitcount = 0;
- while (lpProcessAffinityMask != 0) {
- lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1);
- bitcount++;
- }
- return bitcount;
- } else {
- return proc_count;
- }
- }
- bool os::distribute_processes(uint length, uint* distribution) {
- // Not yet implemented.
- return false;
- }
- bool os::bind_to_processor(uint processor_id) {
- // Not yet implemented.
- return false;
- }
- static void initialize_performance_counter() {
- LARGE_INTEGER count;
- if (QueryPerformanceFrequency(&count)) {
- has_performance_count = 1;
- performance_frequency = as_long(count);
- QueryPerformanceCounter(&count);
- initial_performance_count = as_long(count);
- } else {
- has_performance_count = 0;
- FILETIME wt;
- GetSystemTimeAsFileTime(&wt);
- first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
- }
- }
- double os::elapsedTime() {
- return (double) elapsed_counter() / (double) elapsed_frequency();
- }
- // Windows format:
- // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
- // Java format:
- // Java standards require the number of milliseconds since 1/1/1970
- // Constant offset - calculated using offset()
- static jlong _offset = 116444736000000000;
- // Fake time counter for reproducible results when debugging
- static jlong fake_time = 0;
- #ifdef ASSERT
- // Just to be safe, recalculate the offset in debug mode
- static jlong _calculated_offset = 0;
- static int _has_calculated_offset = 0;
- jlong offset() {
- if (_has_calculated_offset) return _calculated_offset;
- SYSTEMTIME java_origin;
- java_origin.wYear = 1970;
- java_origin.wMonth = 1;
- java_origin.wDayOfWeek = 0; // ignored
- java_origin.wDay = 1;
- java_origin.wHour = 0;
- java_origin.wMinute = 0;
- java_origin.wSecond = 0;
- java_origin.wMilliseconds = 0;
- FILETIME jot;
- if (!SystemTimeToFileTime(&java_origin, &jot)) {
- fatal(err_msg("Error = %d\nWindows error", GetLastError()));
- }
- _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime);
- _has_calculated_offset = 1;
- assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal");
- return _calculated_offset;
- }
- #else
- jlong offset() {
- return _offset;
- }
- #endif
- jlong windows_to_java_time(FILETIME wt) {
- jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
- return (a - offset()) / 10000;
- }
- FILETIME java_to_windows_time(jlong l) {
- jlong a = (l * 10000) + offset();
- FILETIME result;
- result.dwHighDateTime = high(a);
- result.dwLowDateTime = low(a);
- return result;
- }
- // For now, we say that Windows does not support vtime. I have no idea
- // whether it can actually be made to (DLD, 9/13/05).
- bool os::supports_vtime() { return false; }
- bool os::enable_vtime() { return false; }
- bool os::vtime_enabled() { return false; }
- double os::elapsedVTime() {
- // better than nothing, but not much
- return elapsedTime();
- }
- jlong os::javaTimeMillis() {
- if (UseFakeTimers) {
- return fake_time++;
- } else {
- FILETIME wt;
- GetSystemTimeAsFileTime(&wt);
- return windows_to_java_time(wt);
- }
- }
- #define NANOS_PER_SEC CONST64(1000000000)
- #define NANOS_PER_MILLISEC 1000000
- jlong os::javaTimeNanos() {
- if (!has_performance_count) {
- return javaTimeMillis() * NANOS_PER_MILLISEC; // the best we can do.
- } else {
- LARGE_INTEGER current_count;
- QueryPerformanceCounter(¤t_count);
- double current = as_long(current_count);
- double freq = performance_frequency;
- jlong time = (jlong)((current/freq) * NANOS_PER_SEC);
- return time;
- }
- }
- void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
- if (!has_performance_count) {
- // javaTimeMillis() doesn't have much percision,
- // but it is not going to wrap -- so all 64 bits
- info_ptr->max_value = ALL_64_BITS;
- // this is a wall clock timer, so may skip
- info_ptr->may_skip_backward = true;
- info_ptr->may_skip_forward = true;
- } else {
- jlong freq = performance_frequency;
- if (freq < NANOS_PER_SEC) {
- // the performance counter is 64 bits and we will
- // be multiplying it -- so no wrap in 64 bits
- info_ptr->max_value = ALL_64_BITS;
- } else if (freq > NANOS_PER_SEC) {
- // use the max value the counter can reach to
- // determine the max value which could be returned
- julong max_counter = (julong)ALL_64_BITS;
- info_ptr->max_value = (jlong)(max_counter / (freq / NANOS_PER_SEC));
- } else {
- // the performance counter is 64 bits and we will
- // be using it directly -- so no wrap in 64 bits
- info_ptr->max_value = ALL_64_BITS;
- }
- // using a counter, so no skipping
- info_ptr->may_skip_backward = false;
- info_ptr->may_skip_forward = false;
- }
- info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
- }
- char* os::local_time_string(char *buf, size_t buflen) {
- SYSTEMTIME st;
- GetLocalTime(&st);
- jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
- st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
- return buf;
- }
- bool os::getTimesSecs(double* process_real_time,
- double* process_user_time,
- double* process_system_time) {
- HANDLE h_process = GetCurrentProcess();
- FILETIME create_time, exit_time, kernel_time, user_time;
- BOOL result = GetProcessTimes(h_process,
- &create_time,
- &exit_time,
- &kernel_time,
- &user_time);
- if (result != 0) {
- FILETIME wt;
- GetSystemTimeAsFileTime(&wt);
- jlong rtc_millis = windows_to_java_time(wt);
- jlong user_millis = windows_to_java_time(user_time);
- jlong system_millis = windows_to_java_time(kernel_time);
- *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS);
- *process_user_time = ((double) user_millis) / ((double) MILLIUNITS);
- *process_system_time = ((double) system_millis) / ((double) MILLIUNITS);
- return true;
- } else {
- return false;
- }
- }
- void os::shutdown() {
- // allow PerfMemory to attempt cleanup of any persistent resources
- perfMemory_exit();
- // flush buffered output, finish log files
- ostream_abort();
- // Check for abort hook
- abort_hook_t abort_hook = Arguments::abort_hook();
- if (abort_hook != NULL) {
- abort_hook();
- }
- }
- void os::abort(bool dump_core)
- {
- os::shutdown();
- // no core dump on Windows
- ::exit(1);
- }
- // Die immediately, no exit hook, no abort hook, no cleanup.
- void os::die() {
- _exit(-1);
- }
- // Directory routines copied from src/win32/native/java/io/dirent_md.c
- // * dirent_md.c 1.15 00/02/02
- //
- // The declarations for DIR and struct dirent are in jvm_win32.h.
- /* Caller must have already run dirname through JVM_NativePath, which removes
- duplicate slashes and converts all instances of '/' into '\\'. */
- DIR *
- os::opendir(const char *dirname)
- {
- assert(dirname != NULL, "just checking"); // hotspot change
- DIR *dirp = (DIR *)malloc(sizeof(DIR));
- DWORD fattr; // hotspot change
- char alt_dirname[4] = { 0, 0, 0, 0 };
- if (dirp == 0) {
- errno = ENOMEM;
- return 0;
- }
- /*
- * Win32 accepts "\" in its POSIX stat(), but refuses to treat it
- * as a directory in FindFirstFile(). We detect this case here and
- * prepend the current drive name.
- */
- if (dirname[1] == '\0' && dirname[0] == '\\') {
- alt_dirname[0] = _getdrive() + 'A' - 1;
- alt_dirname[1] = ':';
- alt_dirname[2] = '\\';
- alt_dirname[3] = '\0';
- dirname = alt_dirname;
- }
- dirp->path = (char *)malloc(strlen(dirname) + 5);
- if (dirp->path == 0) {
- free(dirp);
- errno = ENOMEM;
- return 0;
- }
- strcpy(dirp->path, dirname);
- fattr = GetFileAttributes(dirp->path);
- if (fattr == 0xffffffff) {
- free(dirp->path);
- free(dirp);
- errno = ENOENT;
- return 0;
- } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
- free(dirp->path);
- free(dirp);
- errno = ENOTDIR;
- return 0;
- }
- /* Append "*.*", or possibly "\\*.*", to path */
- if (dirp->path[1] == ':'
- && (dirp->path[2] == '\0'
- || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) {
- /* No '\\' needed for cases like "Z:" or "Z:\" */
- strcat(dirp->path, "*.*");
- } else {
- strcat(dirp->path, "\\*.*");
- }
- dirp->handle = FindFirstFile(dirp->path, &dirp->find_data);
- if (dirp->handle == INVALID_HANDLE_VALUE) {
- if (GetLastError() != ERROR_FILE_NOT_FOUND) {
- free(dirp->path);
- free(dirp);
- errno = EACCES;
- return 0;
- }
- }
- return dirp;
- }
- /* parameter dbuf unused on Windows */
- struct dirent *
- os::readdir(DIR *dirp, dirent *dbuf)
- {
- assert(dirp != NULL, "just checking"); // hotspot change
- if (dirp->handle == INVALID_HANDLE_VALUE) {
- return 0;
- }
- strcpy(dirp->dirent.d_name, dirp->find_data.cFileName);
- if (!FindNextFile(dirp->handle, &dirp->find_data)) {
- if (GetLastError() == ERROR_INVALID_HANDLE) {
- errno = EBADF;
- return 0;
- }
- FindClose(dirp->handle);
- dirp->handle = INVALID_HANDLE_VALUE;
- }
- return &dirp->dirent;
- }
- int
- os::closedir(DIR *dirp)
- {
- assert(dirp != NULL, "just checking"); // hotspot change
- if (dirp->handle != INVALID_HANDLE_VALUE) {
- if (!FindClose(dirp->handle)) {
- errno = EBADF;
- return -1;
- }
- dirp->handle = INVALID_HANDLE_VALUE;
- }
- free(dirp->path);
- free(dirp);
- return 0;
- }
- // This must be hard coded because it's the system's temporary
- // directory not the java application's temp directory, ala java.io.tmpdir.
- const char* os::get_temp_directory() {
- static char path_buf[MAX_PATH];
- if (GetTempPath(MAX_PATH, path_buf)>0)
- return path_buf;
- else{
- path_buf[0]='\0';
- return path_buf;
- }
- }
- static bool file_exists(const char* filename) {
- if (filename == NULL || strlen(filename) == 0) {
- return false;
- }
- return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES;
- }
- void os::dll_build_name(char *buffer, size_t buflen,
- const char* pname, const char* fname) {
- const size_t pnamelen = pname ? strlen(pname) : 0;
- const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0;
- // Quietly truncates on buffer overflow. Should be an error.
- if (pnamelen + strlen(fname) + 10 > buflen) {
- *buffer = '\0';
- return;
- }
- if (pnamelen == 0) {
- jio_snprintf(buffer, buflen, "%s.dll", fname);
- } else if (c == ':' || c == '\\') {
- jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname);
- } else if (strchr(pname, *os::path_separator()) != NULL) {
- int n;
- char** pelements = split_path(pname, &n);
- for (int i = 0 ; i < n ; i++) {
- char* path = pelements[i];
- // Really shouldn't be NULL, but check can't hurt
- size_t plen = (path == NULL) ? 0 : strlen(path);
- if (plen == 0) {
- continue; // skip the empty path values
- }
- const char lastchar = path[plen - 1];
- if (lastchar == ':' || lastchar == '\\') {
- jio_snprintf(buffer, buflen, "%s%s.dll", path, fname);
- } else {
- jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname);
- }
- if (file_exists(buffer)) {
- break;
- }
- }
- // release the storage
- for (int i = 0 ; i < n ; i++) {
- if (pelements[i] != NULL) {
- FREE_C_HEAP_ARRAY(char, pelements[i]);
- }
- }
- if (pelements != NULL) {
- FREE_C_HEAP_ARRAY(char*, pelements);
- }
- } else {
- jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname);
- }
- }
- // Needs to be in os specific directory because windows requires another
- // header file <direct.h>
- const char* os::get_current_directory(char *buf, int buflen) {
- return _getcwd(buf, buflen);
- }
- //-----------------------------------------------------------
- // Helper functions for fatal error handler
- // The following library functions are resolved dynamically at runtime:
- // PSAPI functions, for Windows NT, 2000, XP
- // psapi.h doesn't come with Visual Studio 6; it can be downloaded as Platform
- // SDK from Microsoft. Here are the definitions copied from psapi.h
- typedef struct _MODULEINFO {
- LPVOID lpBaseOfDll;
- DWORD SizeOfImage;
- LPVOID EntryPoint;
- } MODULEINFO, *LPMODULEINFO;
- static BOOL (WINAPI *_EnumProcessModules) ( HANDLE, HMODULE *, DWORD, LPDWORD );
- static DWORD (WINAPI *_GetModuleFileNameEx) ( HANDLE, HMODULE, LPTSTR, DWORD );
- static BOOL (WINAPI *_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD );
- // ToolHelp Functions, for Windows 95, 98 and ME
- static HANDLE(WINAPI *_CreateToolhelp32Snapshot)(DWORD,DWORD) ;
- static BOOL (WINAPI *_Module32First) (HANDLE,LPMODULEENTRY32) ;
- static BOOL (WINAPI *_Module32Next) (HANDLE,LPMODULEENTRY32) ;
- bool _has_psapi;
- bool _psapi_init = false;
- bool _has_toolhelp;
- static bool _init_psapi() {
- HINSTANCE psapi = LoadLibrary( "PSAPI.DLL" ) ;
- if( psapi == NULL ) return false ;
- _EnumProcessModules = CAST_TO_FN_PTR(
- BOOL(WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD),
- GetProcAddress(psapi, "EnumProcessModules")) ;
- _GetModuleFileNameEx = CAST_TO_FN_PTR(
- DWORD (WINAPI *)(HANDLE, HMODULE, LPTSTR, DWORD),
- GetProcAddress(psapi, "GetModuleFileNameExA"));
- _GetModuleInformation = CAST_TO_FN_PTR(
- BOOL (WINAPI *)(HANDLE, HMODULE, LPMODULEINFO, DWORD),
- GetProcAddress(psapi, "GetModuleInformation"));
- _has_psapi = (_EnumProcessModules && _GetModuleFileNameEx && _GetModuleInformation);
- _psapi_init = true;
- return _has_psapi;
- }
- static bool _init_toolhelp() {
- HINSTANCE kernel32 = LoadLibrary("Kernel32.DLL") ;
- if (kernel32 == NULL) return false ;
- _CreateToolhelp32Snapshot = CAST_TO_FN_PTR(
- HANDLE(WINAPI *)(DWORD,DWORD),
- GetProcAddress(kernel32, "CreateToolhelp32Snapshot"));
- _Module32First = CAST_TO_FN_PTR(
- BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32),
- GetProcAddress(kernel32, "Module32First" ));
- _Module32Next = CAST_TO_FN_PTR(
- BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32),
- GetProcAddress(kernel32, "Module32Next" ));
- _has_toolhelp = (_CreateToolhelp32Snapshot && _Module32First && _Module32Next);
- return _has_toolhelp;
- }
- #ifdef _WIN64
- // Helper routine which returns true if address in
- // within the NTDLL address space.
- //
- static bool _addr_in_ntdll( address addr )
- {
- HMODULE hmod;
- MODULEINFO minfo;
- hmod = GetModuleHandle("NTDLL.DLL");
- if ( hmod == NULL ) return false;
- if ( !_GetModuleInformation( GetCurrentProcess(), hmod,
- &minfo, sizeof(MODULEINFO)) )
- return false;
- if ( (addr >= minfo.lpBaseOfDll) &&
- (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage)))
- return true;
- else
- return false;
- }
- #endif
- // Enumerate all modules for a given process ID
- //
- // Notice that Windows 95/98/Me and Windows NT/2000/XP have
- // different API for doing this. We use PSAPI.DLL on NT based
- // Windows and ToolHelp on 95/98/Me.
- // Callback function that is called by enumerate_modules() on
- // every DLL module.
- // Input parameters:
- // int pid,
- // char* module_file_name,
- // address module_base_addr,
- // unsigned module_size,
- // void* param
- typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *);
- // enumerate_modules for Windows NT, using PSAPI
- static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param)
- {
- HANDLE hProcess ;
- # define MAX_NUM_MODULES 128
- HMODULE modules[MAX_NUM_MODULES];
- static char filename[ MAX_PATH ];
- int result = 0;
- if (!_has_psapi && (_psapi_init || !_init_psapi())) return 0;
- hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
- FALSE, pid ) ;
- if (hProcess == NULL) return 0;
- DWORD size_needed;
- if (!_EnumProcessModules(hProcess, modules,
- sizeof(modules), &size_needed)) {
- CloseHandle( hProcess );
- return 0;
- }
- // number of modules that are currently loaded
- int num_modules = size_needed / sizeof(HMODULE);
- for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) {
- // Get Full pathname:
- if(!_GetModuleFileNameEx(hProcess, modules[i],
- filename, sizeof(filename))) {
- filename[0] = '\0';
- }
- MODULEINFO modinfo;
- if (!_GetModuleInformation(hProcess, modules[i],
- &modinfo, sizeof(modinfo))) {
- modinfo.lpBaseOfDll = NULL;
- modinfo.SizeOfImage = 0;
- }
- // Invoke callback function
- result = func(pid, filename, (address)modinfo.lpBaseOfDll,
- modinfo.SizeOfImage, param);
- if (result) break;
- }
- CloseHandle( hProcess ) ;
- return result;
- }
- // enumerate_modules for Windows 95/98/ME, using TOOLHELP
- static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param)
- {
- HANDLE hSnapShot ;
- static MODULEENTRY32 modentry ;
- int result = 0;
- if (!_has_toolhelp) return 0;
- // Get a handle to a Toolhelp snapshot of the system
- hSnapShot = _CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ;
- if( hSnapShot == INVALID_HANDLE_VALUE ) {
- return FALSE ;
- }
- // iterate through all modules
- modentry.dwSize = sizeof(MODULEENTRY32) ;
- bool not_done = _Module32First( hSnapShot, &modentry ) != 0;
- while( not_done ) {
- // invoke the callback
- result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr,
- modentry.modBaseSize, param);
- if (result) break;
- modentry.dwSize = sizeof(MODULEENTRY32) ;
- not_done = _Module32Next( hSnapShot, &modentry ) != 0;
- }
- CloseHandle(hSnapShot);
- return result;
- }
- int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param )
- {
- // Get current process ID if caller doesn't provide it.
- if (!pid) pid = os::current_process_id();
- if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param);
- else return _enumerate_modules_windows(pid, func, param);
- }
- struct _modinfo {
- address addr;
- char* full_path; // point to a char buffer
- int buflen; // size of the buffer
- address base_addr;
- };
- static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr,
- unsigned size, void * param) {
- struct _modinfo *pmod = (struct _modinfo *)param;
- if (!pmod) return -1;
- if (base_addr <= pmod->addr &&
- base_addr+size > pmod->addr) {
- // if a buffer is provided, copy path name to the buffer
- if (pmod->full_path) {
- jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname);
- }
- pmod->base_addr = base_addr;
- return 1;
- }
- return 0;
- }
- bool os::dll_address_to_library_name(address addr, char* buf,
- int buflen, int* offset) {
- // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
- // return the full path to the DLL file, sometimes it returns path
- // to the corresponding PDB file (debug info); sometimes it only
- // returns partial path, which makes life painful.
- struct _modinfo mi;
- mi.addr = addr;
- mi.full_path = buf;
- mi.buflen = buflen;
- int pid = os::current_process_id();
- if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
- // buf already contains path name
- if (offset) *offset = addr - mi.base_addr;
- return true;
- } else {
- if (buf) buf[0] = '\0';
- if (offset) *offset = -1;
- return false;
- }
- }
- bool os::dll_address_to_function_name(address addr, char *buf,
- int buflen, int *offset) {
- if (Decoder::decode(addr, buf, buflen, offset) == Decoder::no_error) {
- return true;
- }
- if (offset != NULL) *offset = -1;
- if (buf != NULL) buf[0] = '\0';
- return false;
- }
- // save the start and end address of jvm.dll into param[0] and param[1]
- static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr,
- unsigned size, void * param) {
- if (!param) return -1;
- if (base_addr <= (address)_locate_jvm_dll &&
- base_addr+size > (address)_locate_jvm_dll) {
- ((address*)param)[0] = base_addr;
- ((address*)param)[1] = base_addr + size;
- return 1;
- }
- return 0;
- }
- address vm_lib_location[2]; // start and end address of jvm.dll
- // check if addr is inside jvm.dll
- bool os::address_is_in_vm(address addr) {
- if (!vm_lib_location[0] || !vm_lib_location[1]) {
- int pid = os::current_process_id();
- if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) {
- assert(false, "Can't find jvm module.");
- return false;
- }
- }
- return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]);
- }
- // print module info; param is outputStream*
- static int _print_module(int pid, char* fname, address base,
- unsigned size, void* param) {
- if (!param) return -1;
- outputStream* st = (outputStream*)param;
- address end_addr = base + size;
- st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname);
- return 0;
- }
- // Loads .dll/.so and
- // in case of error it checks if .dll/.so was built for the
- // same architecture as Hotspot is running on
- void * os::dll_load(const char *name, char *ebuf, int ebuflen)
- {
- void * result = LoadLibrary(name);
- if (result != NULL)
- {
- return result;
- }
- long errcode = GetLastError();
- if (errcode == ERROR_MOD_NOT_FOUND) {
- strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
- ebuf[ebuflen-1]='\0';
- return NULL;
- }
- // Parsing dll below
- // If we can read dll-info and find that dll was built
- // for an architecture other than Hotspot is running in
- // - then print to buffer "DLL was built for a different architecture"
- // else call getLastErrorString to obtain system error message
- // Read system error message into ebuf
- // It may or may not be overwritten below (in the for loop and just above)
- getLastErrorString(ebuf, (size_t) ebuflen);
- ebuf[ebuflen-1]='\0';
- int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0);
- if (file_descriptor<0)
- {
- return NULL;
- }
- uint32_t signature_offset;
- uint16_t lib_arch=0;
- bool failed_to_get_lib_arch=
- (
- //Go to position 3c in the dll
- (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0)
- ||
- // Read loacation of signature
- (sizeof(signature_offset)!=
- (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset))))
- ||
- //Go to COFF File Header in dll
- //that is located after"signature" (4 bytes long)
- (os::seek_to_file_offset(file_descriptor,
- signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0)
- ||
- //Read field that contains code of architecture
- // that dll was build for
- (sizeof(lib_arch)!=
- (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch))))
- );
- ::close(file_descriptor);
- if (failed_to_get_lib_arch)
- {
- // file i/o error - report getLastErrorString(...) msg
- return NULL;
- }
- typedef struct
- {
- uint16_t arch_code;
- char* arch_name;
- } arch_t;
- static const arch_t arch_array[]={
- {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"},
- {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"},
- {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"}
- };
- #if (defined _M_IA64)
- static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64;
- #elif (defined _M_AMD64)
- static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64;
- #elif (defined _M_IX86)
- static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386;
- #else
- #error Method os::dll_load requires that one of following \
- is defined :_M_IA64,_M_AMD64 or _M_IX86
- #endif
- // Obtain a string for printf operation
- // lib_arch_str shall contain string what platform this .dll was built for
- // running_arch_str shall string contain what platform Hotspot was built for
- char *running_arch_str=NULL,*lib_arch_str=NULL;
- for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++)
- {
- if (lib_arch==arch_array[i].arch_code)
- lib_arch_str=arch_array[i].arch_name;
- if (running_arch==arch_array[i].arch_code)
- running_arch_str=arch_array[i].arch_name;
- }
- assert(running_arch_str,
- "Didn't find runing architecture code in arch_array");
- // If the architure is right
- // but some other error took place - report getLastErrorString(...) msg
- if (lib_arch == running_arch)
- {
- return NULL;
- }
- if (lib_arch_str!=NULL)
- {
- ::_snprintf(ebuf, ebuflen-1,
- "Can't load %s-bit .dll on a %s-bit platform",
- lib_arch_str,running_arch_str);
- }
- else
- {
- // don't know what architecture this dll was build for
- ::_snprintf(ebuf, ebuflen-1,
- "Can't load this .dll (machine code=0x%x) on a %s-bit platform",
- lib_arch,running_arch_str);
- }
- return NULL;
- }
- void os::print_dll_info(outputStream *st) {
- int pid = os::current_process_id();
- st->print_cr("Dynamic libraries:");
- enumerate_modules(pid, _print_module, (void *)st);
- }
- // function pointer to Windows API "GetNativeSystemInfo".
- typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO);
- static GetNativeSystemInfo_func_type _GetNativeSystemInfo;
- void os::print_os_info(outputStream* st) {
- st->print("OS:");
- OSVERSIONINFOEX osvi;
- ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
- osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
- if (!GetVersionEx((OSVERSIONINFO *)&osvi)) {
- st->print_cr("N/A");
- return;
- }
- int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
- if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
- switch (os_vers) {
- case 3051: st->print(" Windows NT 3.51"); break;
- case 4000: st->print(" Windows NT 4.0"); break;
- case 5000: st->print(" Windows 2000"); break;
- case 5001: st->print(" Windows XP"); break;
- case 5002:
- case 6000:
- case 6001: {
- // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
- // find out whether we are running on 64 bit processor or not.
- SYSTEM_INFO si;
- ZeroMemory(&si, sizeof(SYSTEM_INFO));
- // Check to see if _GetNativeSystemInfo has been initialized.
- if (_GetNativeSystemInfo == NULL) {
- HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll"));
- _GetNativeSystemInfo =
- CAST_TO_FN_PTR(GetNativeSystemInfo_func_type,
- GetProcAddress(hKernel32,
- "GetNativeSystemInfo"));
- if (_GetNativeSystemInfo == NULL)
- GetSystemInfo(&si);
- } else {
- _GetNativeSystemInfo(&si);
- }
- if (os_vers == 5002) {
- if (osvi.wProductType == VER_NT_WORKSTATION &&
- si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
- st->print(" Windows XP x64 Edition");
- else
- st->print(" Windows Server 2003 family");
- } else if (os_vers == 6000) {
- if (osvi.wProductType == VER_NT_WORKSTATION)
- st->print(" Windows Vista");
- else
- st->print(" Windows Server 2008");
- if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
- st->print(" , 64 bit");
- } else if (os_vers == 6001) {
- if (osvi.wProductType == VER_NT_WORKSTATION) {
- st->print(" Windows 7");
- } else {
- st->print(" Windows Server 2008 R2");
- }
- if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
- st->print(" , 64 bit");
- } else { // future os
- // Unrecognized windows, print out its major and minor versions
- st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
- if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
- st->print(" , 64 bit");
- }
- break;
- }
- default: // future windows, print out its major and minor versions
- st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
- }
- } else {
- switch (os_vers) {
- case 4000: st->print(" Windows 95"); break;
- case 4010: st->print(" Windows 98"); break;
- case 4090: st->print(" Windows Me"); break;
- default: // future windows, print out its major and minor versions
- st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
- }
- }
- st->print(" Build %d", osvi.dwBuildNumber);
- st->print(" %s", osvi.szCSDVersion); // service pack
- st->cr();
- }
- void os::print_memory_info(outputStream* st) {
- st->print("Memory:");
- st->print(" %dk page", os::vm_page_size()>>10);
- // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
- // value if total memory is larger than 4GB
- MEMORYSTATUSEX ms;
- ms.dwLength = sizeof(ms);
- GlobalMemoryStatusEx(&ms);
- st->print(", physical %uk", os::physical_memory() >> 10);
- st->print("(%uk free)", os::available_memory() >> 10);
- st->print(", swap %uk", ms.ullTotalPageFile >> 10);
- st->print("(%uk free)", ms.ullAvailPageFile >> 10);
- st->cr();
- }
- void os::print_siginfo(outputStream *st, void *siginfo) {
- EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo;
- st->print("siginfo:");
- st->print(" ExceptionCode=0x%x", er->ExceptionCode);
- if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
- er->NumberParameters >= 2) {
- switch (er->ExceptionInformation[0]) {
- case 0: st->print(", reading address"); break;
- case 1: st->print(", writing address"); break;
- default: st->print(", ExceptionInformation=" INTPTR_FORMAT,
- er->ExceptionInformation[0]);
- }
- st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]);
- } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR &&
- er->NumberParameters >= 2 && UseSharedSpaces) {
- FileMapInfo* mapinfo = FileMapInfo::current_info();
- if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) {
- st->print("\n\nError accessing class data sharing archive." \
- " Mapped file inaccessible during execution, " \
- " possible disk/network problem.");
- }
- } else {
- int num = er->NumberParameters;
- if (num > 0) {
- st->print(", ExceptionInformation=");
- for (int i = 0; i < num; i++) {
- st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]);
- }
- }
- }
- st->cr();
- }
- void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
- // do nothing
- }
- static char saved_jvm_path[MAX_PATH] = {0};
- // Find the full path to the current module, jvm.dll or jvm_g.dll
- void os::jvm_path(char *buf, jint buflen) {
- // Error checking.
- if (buflen < MAX_PATH) {
- assert(false, "must use a large-enough buffer");
- buf[0] = '\0';
- return;
- }
- // Lazy resolve the path to current module.
- if (saved_jvm_path[0] != 0) {
- strcpy(buf, saved_jvm_path);
- return;
- }
- buf[0] = '\0';
- if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) {
- // Support for the gamma launcher. Check for an
- // JAVA_HOME environment variable
- // and fix up the path so it looks like
- // libjvm.so is installed there (append a fake suffix
- // hotspot/libjvm.so).
- char* java_home_var = ::getenv("JAVA_HOME");
- if (java_home_var != NULL && java_home_var[0] != 0) {
- strncpy(buf, java_home_var, buflen);
- // determine if this is a legacy image or modules image
- // modules image doesn't have "jre" subdirectory
- size_t len = strlen(buf);
- char* jrebin_p = buf + len;
- jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\");
- if (0 != _access(buf, 0)) {
- jio_snprintf(jrebin_p, buflen-len, "\\bin\\");
- }
- len = strlen(buf);
- jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll");
- }
- }
- if(buf[0] == '\0') {
- GetModuleFileName(vm_lib_handle, buf, buflen);
- }
- strcpy(saved_jvm_path, buf);
- }
- void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
- #ifndef _WIN64
- st->print("_");
- #endif
- }
- void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
- #ifndef _WIN64
- st->print("@%d", args_size * sizeof(int));
- #endif
- }
- // This method is a copy of JDK's sysGetLastErrorString
- // from src/windows/hpi/src/system_md.c
- size_t os::lasterror(char *buf, size_t len) {
- long errval;
- if ((errval = GetLastError()) != 0) {
- /* DOS error */
- int n = (int)FormatMessage(
- FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
- NULL,
- errval,
- 0,
- buf,
- (DWORD)len,
- NULL);
- if (n > 3) {
- /* Drop final '.', CR, LF */
- if (buf[n - 1] == '\n') n--;
- if (buf[n - 1] == '\r') n--;
- if (buf[n - 1] == '.') n--;
- buf[n] = '\0';
- }
- return n;
- }
- if (errno != 0) {
- /* C runtime error that has no corresponding DOS error code */
- const char *s = strerror(errno);
- size_t n = strlen(s);
- if (n >= len) n = len - 1;
- strncpy(buf, s, n);
- buf[n] = '\0';
- return n;
- }
- return 0;
- }
- // sun.misc.Signal
- // NOTE that this is a workaround for an apparent kernel bug where if
- // a signal handler for SIGBREAK is installed then that signal handler
- // takes priority over the console control handler for CTRL_CLOSE_EVENT.
- // See bug 4416763.
- static void (*sigbreakHandler)(int) = NULL;
- static void UserHandler(int sig, void *siginfo, void *context) {
- os::signal_notify(sig);
- // We need to reinstate the signal handler each time...
- os::signal(sig, (void*)UserHandler);
- }
- void* os::user_handler() {
- return (void*) UserHandler;
- }
- void* os::signal(int signal_number, void* handler) {
- if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) {
- void (*oldHandler)(int) = sigbreakHandler;
- sigbreakHandler = (void (*)(int)) handler;
- return (void*) oldHandler;
- } else {
- return (void*)::signal(signal_number, (void (*)(int))handler);
- }
- }
- void os::signal_raise(int signal_number) {
- raise(signal_number);
- }
- // The Win32 C runtime library maps all console control events other than ^C
- // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close,
- // logoff, and shutdown events. We therefore install our own console handler
- // that raises SIGTERM for the latter cases.
- //
- static BOOL WINAPI consoleHandler(DWORD event) {
- switch(event) {
- case CTRL_C_EVENT:
- if (is_error_reported()) {
- // Ctrl-C is pressed during error reporting, likely because the error
- // handler fails to abort. Let VM die immediately.
- os::die();
- }
- os::signal_raise(SIGINT);
- return TRUE;
- break;
- case CTRL_BREAK_EVENT:
- if (sigbreakHandler != NULL) {
- (*sigbreakHandler)(SIGBREAK);
- }
- return TRUE;
- break;
- case CTRL_CLOSE_EVENT:
- case CTRL_LOGOFF_EVENT:
- case CTRL_SHUTDOWN_EVENT:
- os::signal_raise(SIGTERM);
- return TRUE;
- break;
- default:
- break;
- }
- return FALSE;
- }
- /*
- * The following code is moved from os.cpp for making this
- * code platform specific, which it is by its very nature.
- */
- // Return maximum OS signal used + 1 for internal use only
- // Used as exit signal for signal_thread
- int os::sigexitnum_pd(){
- return NSIG;
- }
- // a counter for each possible signal value, including signal_thread exit signal
- static volatile jint pending_signals[NSIG+1] = { 0 };
- static HANDLE sig_sem;
- void os::signal_init_pd() {
- // Initialize signal structures
- memset((void*)pending_signals, 0, sizeof(pending_signals));
- sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL);
- // Programs embedding the VM do not want it to attempt to receive
- // events like CTRL_LOGOFF_EVENT, which are used to implement the
- // shutdown hooks mechanism introduced in 1.3. For example, when
- // the VM is run as part of a Windows NT service (i.e., a servlet
- // engine in a web server), the correct behavior is for any console
- // control handler to return FALSE, not TRUE, because the OS's
- // "final" handler for such events allows the process to continue if
- // it is a service (while terminating it if it is not a service).
- // To make this behavior uniform and the mechanism simpler, we
- // completely disable the VM's usage of these console events if -Xrs
- // (=ReduceSignalUsage) is specified. This means, for example, that
- // the CTRL-BREAK thread dump mechanism is also disabled in this
- // case. See bugs 4323062, 4345157, and related bugs.
- if (!ReduceSignalUsage) {
- // Add a CTRL-C handler
- SetConsoleCtrlHandler(consoleHandler, TRUE);
- }
- }
- void os::signal_notify(int signal_number) {
- BOOL ret;
- Atomic::inc(&pending_signals[signal_number]);
- ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
- assert(ret != 0, "ReleaseSemaphore() failed");
- }
- static int check_pending_signals(bool wait_for_signal) {
- DWORD ret;
- while (true) {
- for (int i = 0; i < NSIG + 1; i++) {
- jint n = pending_signals[i];
- if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
- return i;
- }
- }
- if (!wait_for_signal) {
- return -1;
- }
- JavaThread *thread = JavaThread::current();
- ThreadBlockInVM tbivm(thread);
- bool threadIsSuspended;
- do {
- thread->set_suspend_equivalent();
- // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
- ret = ::WaitForSingleObject(sig_sem, INFINITE);
- assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed");
- // were we externally suspended while we were waiting?
- threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
- if (threadIsSuspended) {
- //
- // The semaphore has been incremented, but while we were waiting
- // another thread suspended us. We don't want to continue running
- // while suspended because that would surprise the thread that
- // suspended us.
- //
- ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
- assert(ret != 0, "ReleaseSemaphore() failed");
- thread->java_suspend_self();
- }
- } while (threadIsSuspended);
- }
- }
- int os::signal_lookup() {
- return check_pending_signals(false);
- }
- int os::signal_wait() {
- return check_pending_signals(true);
- }
- // Implicit OS exception handling
- LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) {
- JavaThread* thread = JavaThread::current();
- // Save pc in thread
- #ifdef _M_IA64
- thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP);
- // Set pc to handler
- exceptionInfo->ContextRecord->StIIP = (DWORD64)handler;
- #elif _M_AMD64
- thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip);
- // Set pc to handler
- exceptionInfo->ContextRecord->Rip = (DWORD64)handler;
- #else
- thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip);
- // Set pc to handler
- exceptionInfo->ContextRecord->Eip = (LONG)handler;
- #endif
- // Continue the execution
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- // Used for PostMortemDump
- extern "C" void safepoints();
- extern "C" void find(int x);
- extern "C" void events();
- // According to Windows API documentation, an illegal instruction sequence should generate
- // the 0xC000001C exception code. However, real world experience shows that occasionnaly
- // the execution of an illegal instruction can generate the exception code 0xC000001E. This
- // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems).
- #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E
- // From "Execution Protection in the Windows Operating System" draft 0.35
- // Once a system header becomes available, the "real" define should be
- // included or copied here.
- #define EXCEPTION_INFO_EXEC_VIOLATION 0x08
- #define def_excpt(val) #val, val
- struct siglabel {
- char *name;
- int number;
- };
- // All Visual C++ exceptions thrown from code generated by the Microsoft Visual
- // C++ compiler contain this error code. Because this is a compiler-generated
- // error, the code is not listed in the Win32 API header files.
- // The code is actually a cryptic mnemonic device, with the initial "E"
- // standing for "exception" and the final 3 bytes (0x6D7363) representing the
- // ASCII values of "msc".
- #define EXCEPTION_UNCAUGHT_CXX_EXCEPTION 0xE06D7363
- struct siglabel exceptlabels[] = {
- def_excpt(EXCEPTION_ACCESS_VIOLATION),
- def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
- def_excpt(EXCEPTION_BREAKPOINT),
- def_excpt(EXCEPTION_SINGLE_STEP),
- def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED),
- def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND),
- def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO),
- def_excpt(EXCEPTION_FLT_INEXACT_RESULT),
- def_excpt(EXCEPTION_FLT_INVALID_OPERATION),
- def_excpt(EXCEPTION_FLT_OVERFLOW),
- def_excpt(EXCEPTION_FLT_STACK_CHECK),
- def_excpt(EXCEPTION_FLT_UNDERFLOW),
- def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO),
- def_excpt(EXCEPTION_INT_OVERFLOW),
- def_excpt(EXCEPTION_PRIV_INSTRUCTION),
- def_excpt(EXCEPTION_IN_PAGE_ERROR),
- def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION),
- def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2),
- def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION),
- def_excpt(EXCEPTION_STACK_OVERFLOW),
- def_excpt(EXCEPTION_INVALID_DISPOSITION),
- def_excpt(EXCEPTION_GUARD_PAGE),
- def_excpt(EXCEPTION_INVALID_HANDLE),
- def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION),
- NULL, 0
- };
- const char* os::exception_name(int exception_code, char *buf, size_t size) {
- for (int i = 0; exceptlabels[i].name != NULL; i++) {
- if (exceptlabels[i].number == exception_code) {
- jio_snprintf(buf, size, "%s", exceptlabels[i].name);
- return buf;
- }
- }
- return NULL;
- }
- //-----------------------------------------------------------------------------
- LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
- // handle exception caused by idiv; should only happen for -MinInt/-1
- // (division by zero is handled explicitly)
- #ifdef _M_IA64
- assert(0, "Fix Handle_IDiv_Exception");
- #elif _M_AMD64
- PCONTEXT ctx = exceptionInfo->ContextRecord;
- address pc = (address)ctx->Rip;
- NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc));
- assert(pc[0] == 0xF7, "not an idiv opcode");
- assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
- assert(ctx->Rax == min_jint, "unexpected idiv exception");
- // set correct result values and continue after idiv instruction
- ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
- ctx->Rax = (DWORD)min_jint; // result
- ctx->Rdx = (DWORD)0; // remainder
- // Continue the execution
- #else
- PCONTEXT ctx = exceptionInfo->ContextRecord;
- address pc = (address)ctx->Eip;
- NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc));
- assert(pc[0] == 0xF7, "not an idiv opcode");
- assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
- assert(ctx->Eax == min_jint, "unexpected idiv exception");
- // set correct result values and continue after idiv instruction
- ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
- ctx->Eax = (DWORD)min_jint; // result
- ctx->Edx = (DWORD)0; // remainder
- // Continue the execution
- #endif
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- #ifndef _WIN64
- //-----------------------------------------------------------------------------
- LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
- // handle exception caused by native method modifying control word
- PCONTEXT ctx = exceptionInfo->ContextRecord;
- DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
- switch (exception_code) {
- case EXCEPTION_FLT_DENORMAL_OPERAND:
- case EXCEPTION_FLT_DIVIDE_BY_ZERO:
- case EXCEPTION_FLT_INEXACT_RESULT:
- case EXCEPTION_FLT_INVALID_OPERATION:
- case EXCEPTION_FLT_OVERFLOW:
- case EXCEPTION_FLT_STACK_CHECK:
- case EXCEPTION_FLT_UNDERFLOW:
- jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std());
- if (fp_control_word != ctx->FloatSave.ControlWord) {
- // Restore FPCW and mask out FLT exceptions
- ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0;
- // Mask out pending FLT exceptions
- ctx->FloatSave.StatusWord &= 0xffffff00;
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- }
- if (prev_uef_handler != NULL) {
- // We didn't handle this exception so pass it to the previous
- // UnhandledExceptionFilter.
- return (prev_uef_handler)(exceptionInfo);
- }
- return EXCEPTION_CONTINUE_SEARCH;
- }
- #else //_WIN64
- /*
- On Windows, the mxcsr control bits are non-volatile across calls
- See also CR 6192333
- If EXCEPTION_FLT_* happened after some native method modified
- mxcsr - it is not a jvm fault.
- However should we decide to restore of mxcsr after a faulty
- native method we can uncomment following code
- jint MxCsr = INITIAL_MXCSR;
- // we can't use StubRoutines::addr_mxcsr_std()
- // because in Win64 mxcsr is not saved there
- if (MxCsr != ctx->MxCsr) {
- ctx->MxCsr = MxCsr;
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- */
- #endif //_WIN64
- // Fatal error reporting is single threaded so we can make this a
- // static and preallocated. If it's more than MAX_PATH silently ignore
- // it.
- static char saved_error_file[MAX_PATH] = {0};
- void os::set_error_file(const char *logfile) {
- if (strlen(logfile) <= MAX_PATH) {
- strncpy(saved_error_file, logfile, MAX_PATH);
- }
- }
- static inline void report_error(Thread* t, DWORD exception_code,
- address addr, void* siginfo, void* context) {
- VMError err(t, exception_code, addr, siginfo, context);
- err.report_and_die();
- // If UseOsErrorReporting, this will return here and save the error file
- // somewhere where we can find it in the minidump.
- }
- //-----------------------------------------------------------------------------
- LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
- if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH;
- DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
- #ifdef _M_IA64
- address pc = (address) exceptionInfo->ContextRecord->StIIP;
- #elif _M_AMD64
- address pc = (address) exceptionInfo->ContextRecord->Rip;
- #else
- address pc = (address) exceptionInfo->ContextRecord->Eip;
- #endif
- Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady
- #ifndef _WIN64
- // Execution protection violation - win32 running on AMD64 only
- // Handled first to avoid misdiagnosis as a "normal" access violation;
- // This is safe to do because we have a new/unique ExceptionInformation
- // code for this condition.
- if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
- PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
- int exception_subcode = (int) exceptionRecord->ExceptionInformation[0];
- address addr = (address) exceptionRecord->ExceptionInformation[1];
- if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) {
- int page_size = os::vm_page_size();
- // Make sure the pc and the faulting address are sane.
- //
- // If an instruction spans a page boundary, and the page containing
- // the beginning of the instruction is executable but the following
- // page is not, the pc and the faulting address might be slightly
- // different - we still want to unguard the 2nd page in this case.
- //
- // 15 bytes seems to be a (very) safe value for max instruction size.
- bool pc_is_near_addr =
- (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
- bool instr_spans_page_boundary =
- (align_size_down((intptr_t) pc ^ (intptr_t) addr,
- (intptr_t) page_size) > 0);
- if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
- static volatile address last_addr =
- (address) os::non_memory_address_word();
- // In conservative mode, don't unguard unless the address is in the VM
- if (UnguardOnExecutionViolation > 0 && addr != last_addr &&
- (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
- // Set memory to RWX and retry
- address page_start =
- (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
- bool res = os::protect_memory((char*) page_start, page_size,
- os::MEM_PROT_RWX);
- if (PrintMiscellaneous && Verbose) {
- char buf[256];
- jio_snprintf(buf, sizeof(buf), "Execution protection violation "
- "at " INTPTR_FORMAT
- ", unguarding " INTPTR_FORMAT ": %s", addr,
- page_start, (res ? "success" : strerror(errno)));
- tty->print_raw_cr(buf);
- }
- // Set last_addr so if we fault again at the same address, we don't
- // end up in an endless loop.
- //
- // There are two potential complications here. Two threads trapping
- // at the same address at the same time could cause one of the
- // threads to think it already unguarded, and abort the VM. Likely
- // very rare.
- //
- // The other race involves two threads alternately trapping at
- // different addresses and failing to unguard the page, resulting in
- // an endless loop. This condition is probably even more unlikely
- // than the first.
- //
- // Although both cases could be avoided by using locks or thread
- // local last_addr, these solutions are unnecessary complication:
- // this handler is a best-effort safety net, not a complete solution.
- // It is disabled by default and should only be used as a workaround
- // in case we missed any no-execute-unsafe VM code.
- last_addr = addr;
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- }
- // Last unguard failed or not unguarding
- tty->print_raw_cr("Execution protection violation");
- report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- return EXCEPTION_CONTINUE_SEARCH;
- }
- }
- #endif // _WIN64
- // Check to see if we caught the safepoint code in the
- // process of write protecting the memory serialization page.
- // It write enables the page immediately after protecting it
- // so just return.
- if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
- JavaThread* thread = (JavaThread*) t;
- PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
- address addr = (address) exceptionRecord->ExceptionInformation[1];
- if ( os::is_memory_serialize_page(thread, addr) ) {
- // Block current thread until the memory serialize page permission restored.
- os::block_on_serialize_page_trap();
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- }
- if (t != NULL && t->is_Java_thread()) {
- JavaThread* thread = (JavaThread*) t;
- bool in_java = thread->thread_state() == _thread_in_Java;
- // Handle potential stack overflows up front.
- if (exception_code == EXCEPTION_STACK_OVERFLOW) {
- if (os::uses_stack_guard_pages()) {
- #ifdef _M_IA64
- //
- // If it's a legal stack address continue, Windows will map it in.
- //
- PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
- address addr = (address) exceptionRecord->ExceptionInformation[1];
- if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() )
- return EXCEPTION_CONTINUE_EXECUTION;
- // The register save area is the same size as the memory stack
- // and starts at the page just above the start of the memory stack.
- // If we get a fault in this area, we've run out of register
- // stack. If we are in java, try throwing a stack overflow exception.
- if (addr > thread->stack_base() &&
- addr <= (thread->stack_base()+thread->stack_size()) ) {
- char buf[256];
- jio_snprintf(buf, sizeof(buf),
- "Register stack overflow, addr:%p, stack_base:%p\n",
- addr, thread->stack_base() );
- tty->print_raw_cr(buf);
- // If not in java code, return and hope for the best.
- return in_java ? Handle_Exception(exceptionInfo,
- SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
- : EXCEPTION_CONTINUE_EXECUTION;
- }
- #endif
- if (thread->stack_yellow_zone_enabled()) {
- // Yellow zone violation. The o/s has unprotected the first yellow
- // zone page for us. Note: must call disable_stack_yellow_zone to
- // update the enabled status, even if the zone contains only one page.
- thread->disable_stack_yellow_zone();
- // If not in java code, return and hope for the best.
- return in_java ? Handle_Exception(exceptionInfo,
- SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
- : EXCEPTION_CONTINUE_EXECUTION;
- } else {
- // Fatal red zone violation.
- thread->disable_stack_red_zone();
- tty->print_raw_cr("An unrecoverable stack overflow has occurred.");
- report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- return EXCEPTION_CONTINUE_SEARCH;
- }
- } else if (in_java) {
- // JVM-managed guard pages cannot be used on win95/98. The o/s provides
- // a one-time-only guard page, which it has released to us. The next
- // stack overflow on this thread will result in an ACCESS_VIOLATION.
- return Handle_Exception(exceptionInfo,
- SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
- } else {
- // Can only return and hope for the best. Further stack growth will
- // result in an ACCESS_VIOLATION.
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
- // Either stack overflow or null pointer exception.
- if (in_java) {
- PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
- address addr = (address) exceptionRecord->ExceptionInformation[1];
- address stack_end = thread->stack_base() - thread->stack_size();
- if (addr < stack_end && addr >= stack_end - os::vm_page_size()) {
- // Stack overflow.
- assert(!os::uses_stack_guard_pages(),
- "should be caught by red zone code above.");
- return Handle_Exception(exceptionInfo,
- SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
- }
- //
- // Check for safepoint polling and implicit null
- // We only expect null pointers in the stubs (vtable)
- // the rest are checked explicitly now.
- //
- CodeBlob* cb = CodeCache::find_blob(pc);
- if (cb != NULL) {
- if (os::is_poll_address(addr)) {
- address stub = SharedRuntime::get_poll_stub(pc);
- return Handle_Exception(exceptionInfo, stub);
- }
- }
- {
- #ifdef _WIN64
- //
- // If it's a legal stack address map the entire region in
- //
- PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
- address addr = (address) exceptionRecord->ExceptionInformation[1];
- if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
- addr = (address)((uintptr_t)addr &
- (~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
- os::commit_memory((char *)addr, thread->stack_base() - addr,
- false );
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- else
- #endif
- {
- // Null pointer exception.
- #ifdef _M_IA64
- // We catch register stack overflows in compiled code by doing
- // an explicit compare and executing a st8(G0, G0) if the
- // BSP enters into our guard area. We test for the overflow
- // condition and fall into the normal null pointer exception
- // code if BSP hasn't overflowed.
- if ( in_java ) {
- if(thread->register_stack_overflow()) {
- assert((address)exceptionInfo->ContextRecord->IntS3 ==
- thread->register_stack_limit(),
- "GR7 doesn't contain register_stack_limit");
- // Disable the yellow zone which sets the state that
- // we've got a stack overflow problem.
- if (thread->stack_yellow_zone_enabled()) {
- thread->disable_stack_yellow_zone();
- }
- // Give us some room to process the exception
- thread->disable_register_stack_guard();
- // Update GR7 with the new limit so we can continue running
- // compiled code.
- exceptionInfo->ContextRecord->IntS3 =
- (ULONGLONG)thread->register_stack_limit();
- return Handle_Exception(exceptionInfo,
- SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
- } else {
- //
- // Check for implicit null
- // We only expect null pointers in the stubs (vtable)
- // the rest are checked explicitly now.
- //
- if (((uintptr_t)addr) < os::vm_page_size() ) {
- // an access to the first page of VM--assume it is a null pointer
- address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
- if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
- }
- }
- } // in_java
- // IA64 doesn't use implicit null checking yet. So we shouldn't
- // get here.
- tty->print_raw_cr("Access violation, possible null pointer exception");
- report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- return EXCEPTION_CONTINUE_SEARCH;
- #else /* !IA64 */
- // Windows 98 reports faulting addresses incorrectly
- if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) ||
- !os::win32::is_nt()) {
- address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
- if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
- }
- report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- return EXCEPTION_CONTINUE_SEARCH;
- #endif
- }
- }
- }
- #ifdef _WIN64
- // Special care for fast JNI field accessors.
- // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks
- // in and the heap gets shrunk before the field access.
- if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
- address addr = JNI_FastGetField::find_slowcase_pc(pc);
- if (addr != (address)-1) {
- return Handle_Exception(exceptionInfo, addr);
- }
- }
- #endif
- #ifdef _WIN64
- // Windows will sometimes generate an access violation
- // when we call malloc. Since we use VectoredExceptions
- // on 64 bit platforms, we see this exception. We must
- // pass this exception on so Windows can recover.
- // We check to see if the pc of the fault is in NTDLL.DLL
- // if so, we pass control on to Windows for handling.
- if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH;
- #endif
- // Stack overflow or null pointer exception in native code.
- report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- return EXCEPTION_CONTINUE_SEARCH;
- }
- if (in_java) {
- switch (exception_code) {
- case EXCEPTION_INT_DIVIDE_BY_ZERO:
- return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO));
- case EXCEPTION_INT_OVERFLOW:
- return Handle_IDiv_Exception(exceptionInfo);
- } // switch
- }
- #ifndef _WIN64
- if (((thread->thread_state() == _thread_in_Java) ||
- (thread->thread_state() == _thread_in_native)) &&
- exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION)
- {
- LONG result=Handle_FLT_Exception(exceptionInfo);
- if (result==EXCEPTION_CONTINUE_EXECUTION) return result;
- }
- #endif //_WIN64
- }
- if (exception_code != EXCEPTION_BREAKPOINT) {
- #ifndef _WIN64
- report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- #else
- // Itanium Windows uses a VectoredExceptionHandler
- // Which means that C++ programatic exception handlers (try/except)
- // will get here. Continue the search for the right except block if
- // the exception code is not a fatal code.
- switch ( exception_code ) {
- case EXCEPTION_ACCESS_VIOLATION:
- case EXCEPTION_STACK_OVERFLOW:
- case EXCEPTION_ILLEGAL_INSTRUCTION:
- case EXCEPTION_ILLEGAL_INSTRUCTION_2:
- case EXCEPTION_INT_OVERFLOW:
- case EXCEPTION_INT_DIVIDE_BY_ZERO:
- case EXCEPTION_UNCAUGHT_CXX_EXCEPTION:
- { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
- exceptionInfo->ContextRecord);
- }
- break;
- default:
- break;
- }
- #endif
- }
- return EXCEPTION_CONTINUE_SEARCH;
- }
- #ifndef _WIN64
- // Special care for fast JNI accessors.
- // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and
- // the heap gets shrunk before the field access.
- // Need to install our own structured exception handler since native code may
- // install its own.
- LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
- DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
- if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
- address pc = (address) exceptionInfo->ContextRecord->Eip;
- address addr = JNI_FastGetField::find_slowcase_pc(pc);
- if (addr != (address)-1) {
- return Handle_Exception(exceptionInfo, addr);
- }
- }
- return EXCEPTION_CONTINUE_SEARCH;
- }
- #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \
- Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \
- __try { \
- return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \
- } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \
- } \
- return 0; \
- }
- DEFINE_FAST_GETFIELD(jboolean, bool, Boolean)
- DEFINE_FAST_GETFIELD(jbyte, byte, Byte)
- DEFINE_FAST_GETFIELD(jchar, char, Char)
- DEFINE_FAST_GETFIELD(jshort, short, Short)
- DEFINE_FAST_GETFIELD(jint, int, Int)
- DEFINE_FAST_GETFIELD(jlong, long, Long)
- DEFINE_FAST_GETFIELD(jfloat, float, Float)
- DEFINE_FAST_GETFIELD(jdouble, double, Double)
- address os::win32::fast_jni_accessor_wrapper(BasicType type) {
- switch (type) {
- case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper;
- case T_BYTE: return (address)jni_fast_GetByteField_wrapper;
- case T_CHAR: return (address)jni_fast_GetCharField_wrapper;
- case T_SHORT: return (address)jni_fast_GetShortField_wrapper;
- case T_INT: return (address)jni_fast_GetIntField_wrapper;
- case T_LONG: return (address)jni_fast_GetLongField_wrapper;
- case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper;
- case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper;
- default: ShouldNotReachHere();
- }
- return (address)-1;
- }
- #endif
- // Virtual Memory
- int os::vm_page_size() { return os::win32::vm_page_size(); }
- int os::vm_allocation_granularity() {
- return os::win32::vm_allocation_granularity();
- }
- // Windows large page support is available on Windows 2003. In order to use
- // large page memory, the administrator must first assign additional privilege
- // to the user:
- // + select Control Panel -> Administrative Tools -> Local Security Policy
- // + select Local Policies -> User Rights Assignment
- // + double click "Lock pages in memory", add users and/or groups
- // + reboot
- // Note the above steps are needed for administrator as well, as administrators
- // by default do not have the privilege to lock pages in memory.
- //
- // Note about Windows 2003: although the API supports committing large page
- // memory on a page-by-page basis and VirtualAlloc() returns success under this
- // scenario, I found through experiment it only uses large page if the entire
- // memory region is reserved and committed in a single VirtualAlloc() call.
- // This makes Windows large page support more or less like Solaris ISM, in
- // that the entire heap must be committed upfront. This probably will change
- // in the future, if so the code below needs to be revisited.
- #ifndef MEM_LARGE_PAGES
- #define MEM_LARGE_PAGES 0x20000000
- #endif
- // GetLargePageMinimum is only available on Windows 2003. The other functions
- // are available on NT but not on Windows 98/Me. We have to resolve them at
- // runtime.
- typedef SIZE_T (WINAPI *GetLargePageMinimum_func_type) (void);
- typedef BOOL (WINAPI *AdjustTokenPrivileges_func_type)
- (HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
- typedef BOOL (WINAPI *OpenProcessToken_func_type) (HANDLE, DWORD, PHANDLE);
- typedef BOOL (WINAPI *LookupPrivilegeValue_func_type) (LPCTSTR, LPCTSTR, PLUID);
- static GetLargePageMinimum_func_type _GetLargePageMinimum;
- static AdjustTokenPrivileges_func_type _AdjustTokenPrivileges;
- static OpenProcessToken_func_type _OpenProcessToken;
- static LookupPrivilegeValue_func_type _LookupPrivilegeValue;
- static HINSTANCE _kernel32;
- static HINSTANCE _advapi32;
- static HANDLE _hProcess;
- static HANDLE _hToken;
- static size_t _large_page_size = 0;
- static bool resolve_functions_for_large_page_init() {
- _kernel32 = LoadLibrary("kernel32.dll");
- if (_kernel32 == NULL) return false;
- _GetLargePageMinimum = CAST_TO_FN_PTR(GetLargePageMinimum_func_type,
- GetProcAddress(_kernel32, "GetLargePageMinimum"));
- if (_GetLargePageMinimum == NULL) return false;
- _advapi32 = LoadLibrary("advapi32.dll");
- if (_advapi32 == NULL) return false;
- _AdjustTokenPrivileges = CAST_TO_FN_PTR(AdjustTokenPrivileges_func_type,
- GetProcAddress(_advapi32, "AdjustTokenPrivileges"));
- _OpenProcessToken = CAST_TO_FN_PTR(OpenProcessToken_func_type,
- GetProcAddress(_advapi32, "OpenProcessToken"));
- _LookupPrivilegeValue = CAST_TO_FN_PTR(LookupPrivilegeValue_func_type,
- GetProcAddress(_advapi32, "LookupPrivilegeValueA"));
- return _AdjustTokenPrivileges != NULL &&
- _OpenProcessToken != NULL &&
- _LookupPrivilegeValue != NULL;
- }
- static bool request_lock_memory_privilege() {
- _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE,
- os::current_process_id());
- LUID luid;
- if (_hProcess != NULL &&
- _OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) &&
- _LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) {
- TOKEN_PRIVILEGES tp;
- tp.PrivilegeCount = 1;
- tp.Privileges[0].Luid = luid;
- tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
- // AdjustTokenPrivileges() may return TRUE even when it couldn't change the
- // privilege. Check GetLastError() too. See MSDN document.
- if (_AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) &&
- (GetLastError() == ERROR_SUCCESS)) {
- return true;
- }
- }
- return false;
- }
- static void cleanup_after_large_page_init() {
- _GetLargePageMinimum = NULL;
- _AdjustTokenPrivileges = NULL;
- _OpenProcessToken = NULL;
- _LookupPrivilegeValue = NULL;
- if (_kernel32) FreeLibrary(_kernel32);
- _kernel32 = NULL;
- if (_advapi32) FreeLibrary(_advapi32);
- _advapi32 = NULL;
- if (_hProcess) CloseHandle(_hProcess);
- _hProcess = NULL;
- if (_hToken) CloseHandle(_hToken);
- _hToken = NULL;
- }
- bool os::large_page_init() {
- if (!UseLargePages) return false;
- // print a warning if any large page related flag is specified on command line
- bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
- !FLAG_IS_DEFAULT(LargePageSizeInBytes);
- bool success = false;
- # define WARN(msg) if (warn_on_failure) { warning(msg); }
- if (resolve_functions_for_large_page_init()) {
- if (request_lock_memory_privilege()) {
- size_t s = _GetLargePageMinimum();
- if (s) {
- #if defined(IA32) || defined(AMD64)
- if (s > 4*M || LargePageSizeInBytes > 4*M) {
- WARN("JVM cannot use large pages bigger than 4mb.");
- } else {
- #endif
- if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) {
- _large_page_size = LargePageSizeInBytes;
- } else {
- _large_page_size = s;
- }
- success = true;
- #if defined(IA32) || defined(AMD64)
- }
- #endif
- } else {
- WARN("Large page is not supported by the processor.");
- }
- } else {
- WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.");
- }
- } else {
- WARN("Large page is not supported by the operating system.");
- }
- #undef WARN
- const size_t default_page_size = (size_t) vm_page_size();
- if (success && _large_page_size > default_page_size) {
- _page_sizes[0] = _large_page_size;
- _page_sizes[1] = default_page_size;
- _page_sizes[2] = 0;
- }
- cleanup_after_large_page_init();
- return success;
- }
- // On win32, one cannot release just a part of reserved memory, it's an
- // all or nothing deal. When we split a reservation, we must break the
- // reservation into two reservations.
- void os::split_reserved_memory(char *base, size_t size, size_t split,
- bool realloc) {
- if (size > 0) {
- release_memory(base, size);
- if (realloc) {
- reserve_memory(split, base);
- }
- if (size != split) {
- reserve_memory(size - split, base + split);
- }
- }
- }
- char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) {
- assert((size_t)addr % os::vm_allocation_granularity() == 0,
- "reserve alignment");
- assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
- char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
- assert(res == NULL || addr == NULL || addr == res,
- "Unexpected address from reserve.");
- return res;
- }
- // Reserve memory at an arbitrary address, only if that area is
- // available (and not reserved for something else).
- char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
- // Windows os::reserve_memory() fails of the requested address range is
- // not avilable.
- return reserve_memory(bytes, requested_addr);
- }
- size_t os::large_page_size() {
- return _large_page_size;
- }
- bool os::can_commit_large_page_memory() {
- // Windows only uses large page memory when the entire region is reserved
- // and committed in a single VirtualAlloc() call. This may change in the
- // future, but with Windows 2003 it's not possible to commit on demand.
- return false;
- }
- bool os::can_execute_large_page_memory() {
- return true;
- }
- char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
- const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
- if (UseLargePagesIndividualAllocation) {
- if (TracePageSizes && Verbose) {
- tty->print_cr("Reserving large pages individually.");
- }
- char * p_buf;
- // first reserve enough address space in advance since we want to be
- // able to break a single contiguous virtual address range into multiple
- // large page commits but WS2003 does not allow reserving large page space
- // so we just use 4K pages for reserve, this gives us a legal contiguous
- // address space. then we will deallocate that reservation, and re alloc
- // using large pages
- const size_t size_of_reserve = bytes + _large_page_size;
- if (bytes > size_of_reserve) {
- // Overflowed.
- warning("Individually allocated large pages failed, "
- "use -XX:-UseLargePagesIndividualAllocation to turn off");
- return NULL;
- }
- p_buf = (char *) VirtualAlloc(addr,
- size_of_reserve, // size of Reserve
- MEM_RESERVE,
- PAGE_READWRITE);
- // If reservation failed, return NULL
- if (p_buf == NULL) return NULL;
- release_memory(p_buf, bytes + _large_page_size);
- // round up to page boundary. If the size_of_reserve did not
- // overflow and the reservation did not fail, this align up
- // should not overflow.
- p_buf = (char *) align_size_up((size_t)p_buf, _large_page_size);
- // now go through and allocate one page at a time until all bytes are
- // allocated
- size_t bytes_remaining = align_size_up(bytes, _large_page_size);
- // An overflow of align_size_up() would have been caught above
- // in the calculation of size_of_reserve.
- char * next_alloc_addr = p_buf;
- #ifdef ASSERT
- // Variable for the failure injection
- long ran_num = os::random();
- size_t fail_after = ran_num % bytes;
- #endif
- while (bytes_remaining) {
- size_t bytes_to_rq = MIN2(bytes_remaining, _large_page_size);
- // Note allocate and commit
- char * p_new;
- #ifdef ASSERT
- bool inject_error = LargePagesIndividualAllocationInjectError &&
- (bytes_remaining <= fail_after);
- #else
- const bool inject_error = false;
- #endif
- if (inject_error) {
- p_new = NULL;
- } else {
- p_new = (char *) VirtualAlloc(next_alloc_addr,
- bytes_to_rq,
- MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES,
- prot);
- }
- if (p_new == NULL) {
- // Free any allocated pages
- if (next_alloc_addr > p_buf) {
- // Some memory was committed so release it.
- size_t bytes_to_release = bytes - bytes_remaining;
- release_memory(p_buf, bytes_to_release);
- }
- #ifdef ASSERT
- if (UseLargePagesIndividualAllocation &&
- LargePagesIndividualAllocationInjectError) {
- if (TracePageSizes && Verbose) {
- tty->print_cr("Reserving large pages individually failed.");
- }
- }
- #endif
- return NULL;
- }
- bytes_remaining -= bytes_to_rq;
- next_alloc_addr += bytes_to_rq;
- }
- return p_buf;
- } else {
- // normal policy just allocate it all at once
- DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
- char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot);
- return res;
- }
- }
- bool os::release_memory_special(char* base, size_t bytes) {
- return release_memory(base, bytes);
- }
- void os::print_statistics() {
- }
- bool os::commit_memory(char* addr, size_t bytes, bool exec) {
- if (bytes == 0) {
- // Don't bother the OS with noops.
- return true;
- }
- assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries");
- assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
- // Don't attempt to print anything if the OS call fails. We're
- // probably low on resources, so the print itself may cause crashes.
- bool result = VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) != 0;
- if (result != NULL && exec) {
- DWORD oldprot;
- // Windows doc says to use VirtualProtect to get execute permissions
- return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot) != 0;
- } else {
- return result;
- }
- }
- bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
- bool exec) {
- return commit_memory(addr, size, exec);
- }
- bool os::uncommit_memory(char* addr, size_t bytes) {
- if (bytes == 0) {
- // Don't bother the OS with noops.
- return true;
- }
- assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries");
- assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks");
- return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0;
- }
- bool os::release_memory(char* addr, size_t bytes) {
- return VirtualFree(addr, 0, MEM_RELEASE) != 0;
- }
- bool os::create_stack_guard_pages(char* addr, size_t size) {
- return os::commit_memory(addr, size);
- }
- bool os::remove_stack_guard_pages(char* addr, size_t size) {
- return os::uncommit_memory(addr, size);
- }
- // Set protections specified
- bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
- bool is_committed) {
- unsigned int p = 0;
- switch (prot) {
- case MEM_PROT_NONE: p = PAGE_NOACCESS; break;
- case MEM_PROT_READ: p = PAGE_READONLY; break;
- case MEM_PROT_RW: p = PAGE_READWRITE; break;
- case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break;
- default:
- ShouldNotReachHere();
- }
- DWORD old_status;
- // Strange enough, but on Win32 one can change protection only for committed
- // memory, not a big deal anyway, as bytes less or equal than 64K
- if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) {
- fatal("cannot commit protection page");
- }
- // One cannot use os::guard_memory() here, as on Win32 guard page
- // have different (one-shot) semantics, from MSDN on PAGE_GUARD:
- //
- // Pages in the region become guard pages. Any attempt to access a guard page
- // causes the system to raise a STATUS_GUARD_PAGE exception and turn off
- // the guard page status. Guard pages thus act as a one-time access alarm.
- return VirtualProtect(addr, bytes, p, &old_status) != 0;
- }
- bool os::guard_memory(char* addr, size_t bytes) {
- DWORD old_status;
- return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0;
- }
- bool os::unguard_memory(char* addr, size_t bytes) {
- DWORD old_status;
- return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0;
- }
- void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
- void os::free_memory(char *addr, size_t bytes) { }
- void os::numa_make_global(char *addr, size_t bytes) { }
- void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { }
- bool os::numa_topology_changed() { return false; }
- size_t os::numa_get_groups_num() { return 1; }
- int os::numa_get_group_id() { return 0; }
- size_t os::numa_get_leaf_groups(int *ids, size_t size) {
- if (size > 0) {
- ids[0] = 0;
- return 1;
- }
- return 0;
- }
- bool os::get_page_info(char *start, page_info* info) {
- return false;
- }
- char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
- return end;
- }
- char* os::non_memory_address_word() {
- // Must never look like an address returned by reserve_memory,
- // even in its subfields (as defined by the CPU immediate fields,
- // if the CPU splits constants across multiple instructions).
- return (char*)-1;
- }
- #define MAX_ERROR_COUNT 100
- #define SYS_THREAD_ERROR 0xffffffffUL
- void os::pd_start_thread(Thread* thread) {
- DWORD ret = ResumeThread(thread->osthread()->thread_handle());
- // Returns previous suspend state:
- // 0: Thread was not suspended
- // 1: Thread is running now
- // >1: Thread is still suspended.
- assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back
- }
- class HighResolutionInterval {
- // The default timer resolution seems to be 10 milliseconds.
- // (Where is this written down?)
- // If someone wants to sleep for only a fraction of the default,
- // then we set the timer resolution down to 1 millisecond for
- // the duration of their interval.
- // We carefully set the resolution back, since otherwise we
- // seem to incur an overhead (3%?) that we don't need.
- // CONSIDER: if ms is small, say 3, then we should run with a high resolution time.
- // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod().
- // Alternatively, we could compute the relative error (503/500 = .6%) and only use
- // timeBeginPeriod() if the relative error exceeded some threshold.
- // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and
- // to decreased efficiency related to increased timer "tick" rates. We want to minimize
- // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high
- // resolution timers running.
- private:
- jlong resolution;
- public:
- HighResolutionInterval(jlong ms) {
- resolution = ms % 10L;
- if (resolution != 0) {
- MMRESULT result = timeBeginPeriod(1L);
- }
- }
- ~HighResolutionInterval() {
- if (resolution != 0) {
- MMRESULT result = timeEndPeriod(1L);
- }
- resolution = 0L;
- }
- };
- int os::sleep(Thread* thread, jlong ms, bool interruptable) {
- jlong limit = (jlong) MAXDWORD;
- while(ms > limit) {
- int res;
- if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT)
- return res;
- ms -= limit;
- }
- assert(thread == Thread::current(), "thread consistency check");
- OSThread* osthread = thread->osthread();
- OSThreadWaitState osts(osthread, false /* not Object.wait() */);
- int result;
- if (interruptable) {
- assert(thread->is_Java_thread(), "must be java thread");
- JavaThread *jt = (JavaThread *) thread;
- ThreadBlockInVM tbivm(jt);
- jt->set_suspend_equivalent();
- // cleared by handle_special_suspend_equivalent_condition() or
- // java_suspend_self() via check_and_wait_while_suspended()
- HANDLE events[1];
- events[0] = osthread->interrupt_event();
- HighResolutionInterval *phri=NULL;
- if(!ForceTimeHighResolution)
- phri = new HighResolutionInterval( ms );
- if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) {
- result = OS_TIMEOUT;
- } else {
- ResetEvent(osthread->interrupt_event());
- osthread->set_interrupted(false);
- result = OS_INTRPT;
- }
- delete phri; //if it is NULL, harmless
- // were we externally suspended while we were waiting?
- jt->check_and_wait_while_suspended();
- } else {
- assert(!thread->is_Java_thread(), "must not be java thread");
- Sleep((long) ms);
- result = OS_TIMEOUT;
- }
- return result;
- }
- // Sleep forever; naked call to OS-specific sleep; use with CAUTION
- void os::infinite_sleep() {
- while (true) { // sleep forever ...
- Sleep(100000); // ... 100 seconds at a time
- }
- }
- typedef BOOL (WINAPI * STTSignature)(void) ;
- os::YieldResult os::NakedYield() {
- // Use either SwitchToThread() or Sleep(0)
- // Consider passing back the return value from SwitchToThread().
- // We use GetProcAddress() as ancient Win9X versions of windows doen't support SwitchToThread.
- // In that case we revert to Sleep(0).
- static volatile STTSignature stt = (STTSignature) 1 ;
- if (stt == ((STTSignature) 1)) {
- stt = (STTSignature) ::GetProcAddress (LoadLibrary ("Kernel32.dll"), "SwitchToThread") ;
- // It's OK if threads race during initialization as the operation above is idempotent.
- }
- if (stt != NULL) {
- return (*stt)() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ;
- } else {
- Sleep (0) ;
- }
- return os::YIELD_UNKNOWN ;
- }
- void os::yield() { os::NakedYield(); }
- void os::yield_all(int attempts) {
- // Yields to all threads, including threads with lower priorities
- Sleep(1);
- }
- // Win32 only gives you access to seven real priorities at a time,
- // so we compress Java's ten down to seven. It would be better
- // if we dynamically adjusted relative priorities.
- int os::java_to_os_priority[MaxPriority + 1] = {
- THREAD_PRIORITY_IDLE, // 0 Entry should never be used
- THREAD_PRIORITY_LOWEST, // 1 MinPriority
- THREAD_PRIORITY_LOWEST, // 2
- THREAD_PRIORITY_BELOW_NORMAL, // 3
- THREAD_PRIORITY_BELOW_NORMAL, // 4
- THREAD_PRIORITY_NORMAL, // 5 NormPriority
- THREAD_PRIORITY_NORMAL, // 6
- THREAD_PRIORITY_ABOVE_NORMAL, // 7
- THREAD_PRIORITY_ABOVE_NORMAL, // 8
- THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
- THREAD_PRIORITY_HIGHEST // 10 MaxPriority
- };
- int prio_policy1[MaxPriority + 1] = {
- THREAD_PRIORITY_IDLE, // 0 Entry should never be used
- THREAD_PRIORITY_LOWEST, // 1 MinPriority
- THREAD_PRIORITY_LOWEST, // 2
- THREAD_PRIORITY_BELOW_NORMAL, // 3
- THREAD_PRIORITY_BELOW_NORMAL, // 4
- THREAD_PRIORITY_NORMAL, // 5 NormPriority
- THREAD_PRIORITY_ABOVE_NORMAL, // 6
- THREAD_PRIORITY_ABOVE_NORMAL, // 7
- THREAD_PRIORITY_HIGHEST, // 8
- THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
- THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority
- };
- static int prio_init() {
- // If ThreadPriorityPolicy is 1, switch tables
- if (ThreadPriorityPolicy == 1) {
- int i;
- for (i = 0; i < MaxPriority + 1; i++) {
- os::java_to_os_priority[i] = prio_policy1[i];
- }
- }
- return 0;
- }
- OSReturn os::set_native_priority(Thread* thread, int priority) {
- if (!UseThreadPriorities) return OS_OK;
- bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0;
- return ret ? OS_OK : OS_ERR;
- }
- OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) {
- if ( !UseThreadPriorities ) {
- *priority_ptr = java_to_os_priority[NormPriority];
- return OS_OK;
- }
- int os_prio = GetThreadPriority(thread->osthread()->thread_handle());
- if (os_prio == THREAD_PRIORITY_ERROR_RETURN) {
- assert(false, "GetThreadPriority failed");
- return OS_ERR;
- }
- *priority_ptr = os_prio;
- return OS_OK;
- }
- // Hint to the underlying OS that a task switch would not be good.
- // Void return because it's a hint and can fail.
- void os::hint_no_preempt() {}
- void os::interrupt(Thread* thread) {
- assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
- "possibility of dangling Thread pointer");
- OSThread* osthread = thread->osthread();
- osthread->set_interrupted(true);
- // More than one thread can get here with the same value of osthread,
- // resulting in multiple notifications. We do, however, want the store
- // to interrupted() to be visible to other threads before we post
- // the interrupt event.
- OrderAccess::release();
- SetEvent(osthread->interrupt_event());
- // For JSR166: unpark after setting status
- if (thread->is_Java_thread())
- ((JavaThread*)thread)->parker()->unpark();
- ParkEvent * ev = thread->_ParkEvent ;
- if (ev != NULL) ev->unpark() ;
- }
- bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
- assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
- "possibility of dangling Thread pointer");
- OSThread* osthread = thread->osthread();
- bool interrupted;
- interrupted = osthread->interrupted();
- if (clear_interrupted == true) {
- osthread->set_interrupted(false);
- ResetEvent(osthread->interrupt_event());
- } // Otherwise leave the interrupted state alone
- return interrupted;
- }
- // Get's a pc (hint) for a running thread. Currently used only for profiling.
- ExtendedPC os::get_thread_pc(Thread* thread) {
- CONTEXT context;
- context.ContextFlags = CONTEXT_CONTROL;
- HANDLE handle = thread->osthread()->thread_handle();
- #ifdef _M_IA64
- assert(0, "Fix get_thread_pc");
- return ExtendedPC(NULL);
- #else
- if (GetThreadContext(handle, &context)) {
- #ifdef _M_AMD64
- return ExtendedPC((address) context.Rip);
- #else
- return ExtendedPC((address) context.Eip);
- #endif
- } else {
- return ExtendedPC(NULL);
- }
- #endif
- }
- // GetCurrentThreadId() returns DWORD
- intx os::current_thread_id() { return GetCurrentThreadId(); }
- static int _initial_pid = 0;
- int os::current_process_id()
- {
- return (_initial_pid ? _initial_pid : _getpid());
- }
- int os::win32::_vm_page_size = 0;
- int os::win32::_vm_allocation_granularity = 0;
- int os::win32::_processor_type = 0;
- // Processor level is not available on non-NT systems, use vm_version instead
- int os::win32::_processor_level = 0;
- julong os::win32::_physical_memory = 0;
- size_t os::win32::_default_stack_size = 0;
- intx os::win32::_os_thread_limit = 0;
- volatile intx os::win32::_os_thread_count = 0;
- bool os::win32::_is_nt = false;
- bool os::win32::_is_windows_2003 = false;
- void os::win32::initialize_system_info() {
- SYSTEM_INFO si;
- GetSystemInfo(&si);
- _vm_page_size = si.dwPageSize;
- _vm_allocation_granularity = si.dwAllocationGranularity;
- _processor_type = si.dwProcessorType;
- _processor_level = si.wProcessorLevel;
- set_processor_count(si.dwNumberOfProcessors);
- MEMORYSTATUSEX ms;
- ms.dwLength = sizeof(ms);
- // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual,
- // dwMemoryLoad (% of memory in use)
- GlobalMemoryStatusEx(&ms);
- _physical_memory = ms.ullTotalPhys;
- OSVERSIONINFO oi;
- oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
- GetVersionEx(&oi);
- switch(oi.dwPlatformId) {
- case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break;
- case VER_PLATFORM_WIN32_NT:
- _is_nt = true;
- {
- int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion;
- if (os_vers == 5002) {
- _is_windows_2003 = true;
- }
- }
- break;
- default: fatal("Unknown platform");
- }
- _default_stack_size = os::current_stack_size();
- assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size");
- assert((_default_stack_size & (_vm_page_size - 1)) == 0,
- "stack size not a multiple of page size");
- initialize_performance_counter();
- // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is
- // known to deadlock the system, if the VM issues to thread operations with
- // a too high frequency, e.g., such as changing the priorities.
- // The 6000 seems to work well - no deadlocks has been notices on the test
- // programs that we have seen experience this problem.
- if (!os::win32::is_nt()) {
- StarvationMonitorInterval = 6000;
- }
- }
- void os::win32::setmode_streams() {
- _setmode(_fileno(stdin), _O_BINARY);
- _setmode(_fileno(stdout), _O_BINARY);
- _setmode(_fileno(stderr), _O_BINARY);
- }
- int os::message_box(const char* title, const char* message) {
- int result = MessageBox(NULL, message, title,
- MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY);
- return result == IDYES;
- }
- int os::allocate_thread_local_storage() {
- return TlsAlloc();
- }
- void os::free_thread_local_storage(int index) {
- TlsFree(index);
- }
- void os::thread_local_storage_at_put(int index, void* value) {
- TlsSetValue(index, value);
- assert(thread_local_storage_at(index) == value, "Just checking");
- }
- void* os::thread_local_storage_at(int index) {
- return TlsGetValue(index);
- }
- #ifndef PRODUCT
- #ifndef _WIN64
- // Helpers to check whether NX protection is enabled
- int nx_exception_filter(_EXCEPTION_POINTERS *pex) {
- if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
- pex->ExceptionRecord->NumberParameters > 0 &&
- pex->ExceptionRecord->ExceptionInformation[0] ==
- EXCEPTION_INFO_EXEC_VIOLATION) {
- return EXCEPTION_EXECUTE_HANDLER;
- }
- return EXCEPTION_CONTINUE_SEARCH;
- }
- void nx_check_protection() {
- // If NX is enabled we'll get an exception calling into code on the stack
- char code[] = { (char)0xC3 }; // ret
- void *code_ptr = (void *)code;
- __try {
- __asm call code_ptr
- } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) {
- tty->print_raw_cr("NX protection detected.");
- }
- }
- #endif // _WIN64
- #endif // PRODUCT
- // this is called _before_ the global arguments have been parsed
- void os::init(void) {
- _initial_pid = _getpid();
- init_random(1234567);
- win32::initialize_system_info();
- win32::setmode_streams();
- init_page_sizes((size_t) win32::vm_page_size());
- // For better scalability on MP systems (must be called after initialize_system_info)
- #ifndef PRODUCT
- if (is_MP()) {
- NoYieldsInMicrolock = true;
- }
- #endif
- // This may be overridden later when argument processing is done.
- FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation,
- os::win32::is_windows_2003());
- // Initialize main_process and main_thread
- main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle
- if (!DuplicateHandle(main_process, GetCurrentThread(), main_process,
- &main_thread, THREAD_ALL_ACCESS, false, 0)) {
- fatal("DuplicateHandle failed\n");
- }
- main_thread_id = (int) GetCurrentThreadId();
- }
- // To install functions for atexit processing
- extern "C" {
- static void perfMemory_exit_helper() {
- perfMemory_exit();
- }
- }
- // this is called _after_ the global arguments have been parsed
- jint os::init_2(void) {
- // Allocate a single page and mark it as readable for safepoint polling
- address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY);
- guarantee( polling_page != NULL, "Reserve Failed for polling page");
- address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY);
- guarantee( return_page != NULL, "Commit Failed for polling page");
- os::set_polling_page( polling_page );
- #ifndef PRODUCT
- if( Verbose && PrintMiscellaneous )
- tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
- #endif
- if (!UseMembar) {
- address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
- guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
- return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
- guarantee( return_page != NULL, "Commit Failed for memory serialize page");
- os::set_memory_serialize_page( mem_serialize_page );
- #ifndef PRODUCT
- if(Verbose && PrintMiscellaneous)
- tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
- #endif
- }
- FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
- // Setup Windows Exceptions
- // On Itanium systems, Structured Exception Handling does not
- // work since stack frames must be walkable by the OS. Since
- // much of our code is dynamically generated, and we do not have
- // proper unwind .xdata sections, the system simply exits
- // rather than delivering the exception. To work around
- // this we use VectorExceptions instead.
- #ifdef _WIN64
- if (UseVectoredExceptions) {
- topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter);
- }
- #endif
- // for debugging float code generation bugs
- if (ForceFloatExceptions) {
- #ifndef _WIN64
- static long fp_control_word = 0;
- __asm { fstcw fp_control_word }
- // see Intel PPro Manual, Vol. 2, p 7-16
- const long precision = 0x20;
- const long underflow = 0x10;
- const long overflow = 0x08;
- const long zero_div = 0x04;
- const long denorm = 0x02;
- const long invalid = 0x01;
- fp_control_word |= invalid;
- __asm { fldcw fp_control_word }
- #endif
- }
- // If stack_commit_size is 0, windows will reserve the default size,
- // but only commit a small portion of it.
- size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size());
- size_t default_reserve_size = os::win32::default_stack_size();
- size_t actual_reserve_size = stack_commit_size;
- if (stack_commit_size < default_reserve_size) {
- // If stack_commit_size == 0, we want this too
- actual_reserve_size = default_reserve_size;
- }
- // Check minimum allowable stack size for thread creation and to initialize
- // the java system classes, including StackOverflowError - depends on page
- // size. Add a page for compiler2 recursion in main thread.
- // Add in 2*BytesPerWord times page size to account for VM stack during
- // class initialization depending on 32 or 64 bit VM.
- size_t min_stack_allowed =
- (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
- 2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size();
- if (actual_reserve_size < min_stack_allowed) {
- tty->print_cr("\nThe stack size specified is too small, "
- "Specify at least %dk",
- min_stack_allowed / K);
- return JNI_ERR;
- }
- JavaThread::set_stack_size_at_create(stack_commit_size);
- // Calculate theoretical max. size of Threads to guard gainst artifical
- // out-of-memory situations, where all available address-space has been
- // reserved by thread stacks.
- assert(actual_reserve_size != 0, "Must have a stack");
- // Calculate the thread limit when we should start doing Virtual Memory
- // banging. Currently when the threads will have used all but 200Mb of space.
- //
- // TODO: consider performing a similar calculation for commit size instead
- // as reserve size, since on a 64-bit platform we'll run into that more
- // often than running out of virtual memory space. We can use the
- // lower value of the two calculations as the os_thread_limit.
- size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K);
- win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size);
- // at exit methods are called in the reverse order of their registration.
- // there is no limit to the number of functions registered. atexit does
- // not set errno.
- if (PerfAllowAtExitRegistration) {
- // only register atexit functions if PerfAllowAtExitRegistration is set.
- // atexit functions can be delayed until process exit time, which
- // can be problematic for embedded VM situations. Embedded VMs should
- // call DestroyJavaVM() to assure that VM resources are released.
- // note: perfMemory_exit_helper atexit function may be removed in
- // the future if the appropriate cleanup code can be added to the
- // VM_Exit VMOperation's doit method.
- if (atexit(perfMemory_exit_helper) != 0) {
- warning("os::init_2 atexit(perfMemory_exit_helper) failed");
- }
- }
- // initialize PSAPI or ToolHelp for fatal error handler
- if (win32::is_nt()) _init_psapi();
- else _init_toolhelp();
- #ifndef _WIN64
- // Print something if NX is enabled (win32 on AMD64)
- NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection());
- #endif
- // initialize thread priority policy
- prio_init();
- if (UseNUMA && !ForceNUMA) {
- UseNUMA = false; // Currently unsupported.
- }
- return JNI_OK;
- }
- void os::init_3(void) {
- return;
- }
- // Mark the polling page as unreadable
- void os::make_polling_page_unreadable(void) {
- DWORD old_status;
- if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) )
- fatal("Could not disable polling page");
- };
- // Mark the polling page as readable
- void os::make_polling_page_readable(void) {
- DWORD old_status;
- if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) )
- fatal("Could not enable polling page");
- };
- int os::stat(const char *path, struct stat *sbuf) {
- char pathbuf[MAX_PATH];
- if (strlen(path) > MAX_PATH - 1) {
- errno = ENAMETOOLONG;
- return -1;
- }
- os::native_path(strcpy(pathbuf, path));
- int ret = ::stat(pathbuf, sbuf);
- if (sbuf != NULL && UseUTCFileTimestamp) {
- // Fix for 6539723. st_mtime returned from stat() is dependent on
- // the system timezone and so can return different values for the
- // same file if/when daylight savings time changes. This adjustment
- // makes sure the same timestamp is returned regardless of the TZ.
- //
- // See:
- // http://msdn.microsoft.com/library/
- // default.asp?url=/library/en-us/sysinfo/base/
- // time_zone_information_str.asp
- // and
- // http://msdn.microsoft.com/library/default.asp?url=
- // /library/en-us/sysinfo/base/settimezoneinformation.asp
- //
- // NOTE: there is a insidious bug here: If the timezone is changed
- // after the call to stat() but before 'GetTimeZoneInformation()', then
- // the adjustment we do here will be wrong and we'll return the wrong
- // value (which will likely end up creating an invalid class data
- // archive). Absent a better API for this, or some time zone locking
- // mechanism, we'll have to live with this risk.
- TIME_ZONE_INFORMATION tz;
- DWORD tzid = GetTimeZoneInformation(&tz);
- int daylightBias =
- (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias;
- sbuf->st_mtime += (tz.Bias + daylightBias) * 60;
- }
- return ret;
- }
- #define FT2INT64(ft) \
- ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime))
- // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
- // are used by JVM M&M and JVMTI to get user+sys or user CPU time
- // of a thread.
- //
- // current_thread_cpu_time() and thread_cpu_time(Thread*) returns
- // the fast estimate available on the platform.
- // current_thread_cpu_time() is not optimized for Windows yet
- jlong os::current_thread_cpu_time() {
- // return user + sys since the cost is the same
- return os::thread_cpu_time(Thread::current(), true /* user+sys */);
- }
- jlong os::thread_cpu_time(Thread* thread) {
- // consistent with what current_thread_cpu_time() returns.
- return os::thread_cpu_time(thread, true /* user+sys */);
- }
- jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
- return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
- }
- jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) {
- // This code is copy from clasic VM -> hpi::sysThreadCPUTime
- // If this function changes, os::is_thread_cpu_time_supported() should too
- if (os::win32::is_nt()) {
- FILETIME CreationTime;
- FILETIME ExitTime;
- FILETIME KernelTime;
- FILETIME UserTime;
- if ( GetThreadTimes(thread->osthread()->thread_handle(),
- &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
- return -1;
- else
- if (user_sys_cpu_time) {
- return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100;
- } else {
- return FT2INT64(UserTime) * 100;
- }
- } else {
- return (jlong) timeGetTime() * 1000000;
- }
- }
- void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
- info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
- info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
- info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
- info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
- }
- void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
- info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
- info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
- info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
- info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
- }
- bool os::is_thread_cpu_time_supported() {
- // see os::thread_cpu_time
- if (os::win32::is_nt()) {
- FILETIME CreationTime;
- FILETIME ExitTime;
- FILETIME KernelTime;
- FILETIME UserTime;
- if ( GetThreadTimes(GetCurrentThread(),
- &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
- return false;
- else
- return true;
- } else {
- return false;
- }
- }
- // Windows does't provide a loadavg primitive so this is stubbed out for now.
- // It does have primitives (PDH API) to get CPU usage and run queue length.
- // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length"
- // If we wanted to implement loadavg on Windows, we have a few options:
- //
- // a) Query CPU usage and run queue length and "fake" an answer by
- // returning the CPU usage if it's under 100%, and the run queue
- // length otherwise. It turns out that querying is pretty slow
- // on Windows, on the order of 200 microseconds on a fast machine.
- // Note that on the Windows the CPU usage value is the % usage
- // since the last time the API was called (and the first call
- // returns 100%), so we'd have to deal with that as well.
- //
- // b) Sample the "fake" answer using a sampling thread and store
- // the answer in a global variable. The call to loadavg would
- // just return the value of the global, avoiding the slow query.
- //
- // c) Sample a better answer using exponential decay to smooth the
- // value. This is basically the algorithm used by UNIX kernels.
- //
- // Note that sampling thread starvation could affect both (b) and (c).
- int os::loadavg(double loadavg[], int nelem) {
- return -1;
- }
- // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield()
- bool os::dont_yield() {
- return DontYieldALot;
- }
- // This method is a slightly reworked copy of JDK's sysOpen
- // from src/windows/hpi/src/sys_api_md.c
- int os::open(const char *path, int oflag, int mode) {
- char pathbuf[MAX_PATH];
- if (strlen(path) > MAX_PATH - 1) {
- errno = ENAMETOOLONG;
- return -1;
- }
- os::native_path(strcpy(pathbuf, path));
- return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode);
- }
- // Is a (classpath) directory empty?
- bool os::dir_is_empty(const char* path) {
- WIN32_FIND_DATA fd;
- HANDLE f = FindFirstFile(path, &fd);
- if (f == INVALID_HANDLE_VALUE) {
- return true;
- }
- FindClose(f);
- return false;
- }
- // create binary file, rewriting existing file if required
- int os::create_binary_file(const char* path, bool rewrite_existing) {
- int oflags = _O_CREAT | _O_WRONLY | _O_BINARY;
- if (!rewrite_existing) {
- oflags |= _O_EXCL;
- }
- return ::open(path, oflags, _S_IREAD | _S_IWRITE);
- }
- // return current position of file pointer
- jlong os::current_file_offset(int fd) {
- return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR);
- }
- // move file pointer to the specified offset
- jlong os::seek_to_file_offset(int fd, jlong offset) {
- return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET);
- }
- jlong os::lseek(int fd, jlong offset, int whence) {
- return (jlong) ::_lseeki64(fd, offset, whence);
- }
- // This method is a slightly reworked copy of JDK's sysNativePath
- // from src/windows/hpi/src/path_md.c
- /* Convert a pathname to native format. On win32, this involves forcing all
- separators to be '\\' rather than '/' (both are legal inputs, but Win95
- sometimes rejects '/') and removing redundant separators. The input path is
- assumed to have been converted into the character encoding used by the local
- system. Because this might be a double-byte encoding, care is taken to
- treat double-byte lead characters correctly.
- This procedure modifies the given path in place, as the result is never
- longer than the original. There is no error return; this operation always
- succeeds. */
- char * os::native_path(char *path) {
- char *src = path, *dst = path, *end = path;
- char *colon = NULL; /* If a drive specifier is found, this will
- point to the colon following the drive
- letter */
- /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */
- assert(((!::IsDBCSLeadByte('/'))
- && (!::IsDBCSLeadByte('\\'))
- && (!::IsDBCSLeadByte(':'))),
- "Illegal lead byte");
- /* Check for leading separators */
- #define isfilesep(c) ((c) == '/' || (c) == '\\')
- while (isfilesep(*src)) {
- src++;
- }
- if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') {
- /* Remove leading separators if followed by drive specifier. This
- hack is necessary to support file URLs containing drive
- specifiers (e.g., "file://c:/path"). As a side effect,
- "/c:/path" can be used as an alternative to "c:/path". */
- *dst++ = *src++;
- colon = dst;
- *dst++ = ':';
- src++;
- } else {
- src = path;
- if (isfilesep(src[0]) && isfilesep(src[1])) {
- /* UNC pathname: Retain first separator; leave src pointed at
- second separator so that further separators will be collapsed
- into the second separator. The result will be a pathname
- beginning with "\\\\" followed (most likely) by a host name. */
- src = dst = path + 1;
- path[0] = '\\'; /* Force first separator to '\\' */
- }
- }
- end = dst;
- /* Remove redundant separators from remainder of path, forcing all
- separators to be '\\' rather than '/'. Also, single byte space
- characters are removed from the end of the path because those
- are not legal ending characters on this operating system.
- */
- while (*src != '\0') {
- if (isfilesep(*src)) {
- *dst++ = '\\'; src++;
- while (isfilesep(*src)) src++;
- if (*src == '\0') {
- /* Check for trailing separator */
- end = dst;
- if (colon == dst - 2) break; /* "z:\\" */
- if (dst == path + 1) break; /* "\\" */
- if (dst == path + 2 && isfilesep(path[0])) {
- /* "\\\\" is not collapsed to "\\" because "\\\\" marks the
- beginning of a UNC pathname. Even though it is not, by
- itself, a valid UNC pathname, we leave it as is in order
- to be consistent with the path canonicalizer as well
- as the win32 APIs, which treat this case as an invalid
- UNC pathname rather than as an alias for the root
- directory of the current drive. */
- break;
- }
- end = --dst; /* Path does not denote a root directory, so
- remove trailing separator */
- break;
- }
- end = dst;
- } else {
- if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */
- *dst++ = *src++;
- if (*src) *dst++ = *src++;
- end = dst;
- } else { /* Copy a single-byte character */
- char c = *src++;
- *dst++ = c;
- /* Space is not a legal ending character */
- if (c != ' ') end = dst;
- }
- }
- }
- *end = '\0';
- /* For "z:", add "." to work around a bug in the C runtime library */
- if (colon == dst - 1) {
- path[2] = '.';
- path[3] = '\0';
- }
- #ifdef DEBUG
- jio_fprintf(stderr, "sysNativePath: %s\n", path);
- #endif DEBUG
- return path;
- }
- // This code is a copy of JDK's sysSetLength
- // from src/windows/hpi/src/sys_api_md.c
- int os::ftruncate(int fd, jlong length) {
- HANDLE h = (HANDLE)::_get_osfhandle(fd);
- long high = (long)(length >> 32);
- DWORD ret;
- if (h == (HANDLE)(-1)) {
- return -1;
- }
- ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN);
- if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) {
- return -1;
- }
- if (::SetEndOfFile(h) == FALSE) {
- return -1;
- }
- return 0;
- }
- // This code is a copy of JDK's sysSync
- // from src/windows/hpi/src/sys_api_md.c
- // except for the legacy workaround for a bug in Win 98
- int os::fsync(int fd) {
- HANDLE handle = (HANDLE)::_get_osfhandle(fd);
- if ( (!::FlushFileBuffers(handle)) &&
- (GetLastError() != ERROR_ACCESS_DENIED) ) {
- /* from winerror.h */
- return -1;
- }
- return 0;
- }
- static int nonSeekAvailable(int, long *);
- static int stdinAvailable(int, long *);
- #define S_ISCHR(mode) (((mode) & _S_IFCHR) == _S_IFCHR)
- #define S_ISFIFO(mode) (((mode) & _S_IFIFO) == _S_IFIFO)
- // This code is a copy of JDK's sysAvailable
- // from src/windows/hpi/src/sys_api_md.c
- int os::available(int fd, jlong *bytes) {
- jlong cur, end;
- struct _stati64 stbuf64;
- if (::_fstati64(fd, &stbuf64) >= 0) {
- int mode = stbuf64.st_mode;
- if (S_ISCHR(mode) || S_ISFIFO(mode)) {
- int ret;
- long lpbytes;
- if (fd == 0) {
- ret = stdinAvailable(fd, &lpbytes);
- } else {
- ret = nonSeekAvailable(fd, &lpbytes);
- }
- (*bytes) = (jlong)(lpbytes);
- return ret;
- }
- if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) {
- return FALSE;
- } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) {
- return FALSE;
- } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) {
- return FALSE;
- }
- *bytes = end - cur;
- return TRUE;
- } else {
- return FALSE;
- }
- }
- // This code is a copy of JDK's nonSeekAvailable
- // from src/windows/hpi/src/sys_api_md.c
- static int nonSeekAvailable(int fd, long *pbytes) {
- /* This is used for available on non-seekable devices
- * (like both named and anonymous pipes, such as pipes
- * connected to an exec'd process).
- * Standard Input is a special case.
- *
- */
- HANDLE han;
- if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) {
- return FALSE;
- }
- if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) {
- /* PeekNamedPipe fails when at EOF. In that case we
- * simply make *pbytes = 0 which is consistent with the
- * behavior we get on Solaris when an fd is at EOF.
- * The only alternative is to raise an Exception,
- * which isn't really warranted.
- */
- if (::GetLastError() != ERROR_BROKEN_PIPE) {
- return FALSE;
- }
- *pbytes = 0;
- }
- return TRUE;
- }
- #define MAX_INPUT_EVENTS 2000
- // This code is a copy of JDK's stdinAvailable
- // from src/windows/hpi/src/sys_api_md.c
- static int stdinAvailable(int fd, long *pbytes) {
- HANDLE han;
- DWORD numEventsRead = 0; /* Number of events read from buffer */
- DWORD numEvents = 0; /* Number of events in buffer */
- DWORD i = 0; /* Loop index */
- DWORD curLength = 0; /* Position marker */
- DWORD actualLength = 0; /* Number of bytes readable */
- BOOL error = FALSE; /* Error holder */
- INPUT_RECORD *lpBuffer; /* Pointer to records of input events */
- if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
- return FALSE;
- }
- /* Construct an array of input records in the console buffer */
- error = ::GetNumberOfConsoleInputEvents(han, &numEvents);
- if (error == 0) {
- return nonSeekAvailable(fd, pbytes);
- }
- /* lpBuffer must fit into 64K or else PeekConsoleInput fails */
- if (numEvents > MAX_INPUT_EVENTS) {
- numEvents = MAX_INPUT_EVENTS;
- }
- lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD));
- if (lpBuffer == NULL) {
- return FALSE;
- }
- error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead);
- if (error == 0) {
- os::free(lpBuffer);
- return FALSE;
- }
- /* Examine input records for the number of bytes available */
- for(i=0; i<numEvents; i++) {
- if (lpBuffer[i].EventType == KEY_EVENT) {
- KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *)
- &(lpBuffer[i].Event);
- if (keyRecord->bKeyDown == TRUE) {
- CHAR *keyPressed = (CHAR *) &(keyRecord->uChar);
- curLength++;
- if (*keyPressed == '\r') {
- actualLength = curLength;
- }
- }
- }
- }
- if(lpBuffer != NULL) {
- os::free(lpBuffer);
- }
- *pbytes = (long) actualLength;
- return TRUE;
- }
- // Map a block of memory.
- char* os::map_memory(int fd, const char* file_name, size_t file_offset,
- char *addr, size_t bytes, bool read_only,
- bool allow_exec) {
- HANDLE hFile;
- char* base;
- hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
- OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- if (hFile == NULL) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("CreateFile() failed: GetLastError->%ld.");
- }
- return NULL;
- }
- if (allow_exec) {
- // CreateFileMapping/MapViewOfFileEx can't map executable memory
- // unless it comes from a PE image (which the shared archive is not.)
- // Even VirtualProtect refuses to give execute access to mapped memory
- // that was not previously executable.
- //
- // Instead, stick the executable region in anonymous memory. Yuck.
- // Penalty is that ~4 pages will not be shareable - in the future
- // we might consider DLLizing the shared archive with a proper PE
- // header so that mapping executable + sharing is possible.
- base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE,
- PAGE_READWRITE);
- if (base == NULL) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err);
- }
- CloseHandle(hFile);
- return NULL;
- }
- DWORD bytes_read;
- OVERLAPPED overlapped;
- overlapped.Offset = (DWORD)file_offset;
- overlapped.OffsetHigh = 0;
- overlapped.hEvent = NULL;
- // ReadFile guarantees that if the return value is true, the requested
- // number of bytes were read before returning.
- bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0;
- if (!res) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("ReadFile() failed: GetLastError->%ld.", err);
- }
- release_memory(base, bytes);
- CloseHandle(hFile);
- return NULL;
- }
- } else {
- HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0,
- NULL /*file_name*/);
- if (hMap == NULL) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.");
- }
- CloseHandle(hFile);
- return NULL;
- }
- DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY;
- base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset,
- (DWORD)bytes, addr);
- if (base == NULL) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err);
- }
- CloseHandle(hMap);
- CloseHandle(hFile);
- return NULL;
- }
- if (CloseHandle(hMap) == 0) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err);
- }
- CloseHandle(hFile);
- return base;
- }
- }
- if (allow_exec) {
- DWORD old_protect;
- DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE;
- bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0;
- if (!res) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err);
- }
- // Don't consider this a hard error, on IA32 even if the
- // VirtualProtect fails, we should still be able to execute
- CloseHandle(hFile);
- return base;
- }
- }
- if (CloseHandle(hFile) == 0) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err);
- }
- return base;
- }
- return base;
- }
- // Remap a block of memory.
- char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
- char *addr, size_t bytes, bool read_only,
- bool allow_exec) {
- // This OS does not allow existing memory maps to be remapped so we
- // have to unmap the memory before we remap it.
- if (!os::unmap_memory(addr, bytes)) {
- return NULL;
- }
- // There is a very small theoretical window between the unmap_memory()
- // call above and the map_memory() call below where a thread in native
- // code may be able to access an address that is no longer mapped.
- return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only,
- allow_exec);
- }
- // Unmap a block of memory.
- // Returns true=success, otherwise false.
- bool os::unmap_memory(char* addr, size_t bytes) {
- BOOL result = UnmapViewOfFile(addr);
- if (result == 0) {
- if (PrintMiscellaneous && Verbose) {
- DWORD err = GetLastError();
- tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err);
- }
- return false;
- }
- return true;
- }
- void os::pause() {
- char filename[MAX_PATH];
- if (PauseAtStartupFile && PauseAtStartupFile[0]) {
- jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
- } else {
- jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
- }
- int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
- if (fd != -1) {
- struct stat buf;
- ::close(fd);
- while (::stat(filename, &buf) == 0) {
- Sleep(100);
- }
- } else {
- jio_fprintf(stderr,
- "Could not open pause file '%s', continuing immediately.\n", filename);
- }
- }
- // An Event wraps a win32 "CreateEvent" kernel handle.
- //
- // We have a number of choices regarding "CreateEvent" win32 handle leakage:
- //
- // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle
- // field, and call CloseHandle() on the win32 event handle. Unpark() would
- // need to be modified to tolerate finding a NULL (invalid) win32 event handle.
- // In addition, an unpark() operation might fetch the handle field, but the
- // event could recycle between the fetch and the SetEvent() operation.
- // SetEvent() would either fail because the handle was invalid, or inadvertently work,
- // as the win32 handle value had been recycled. In an ideal world calling SetEvent()
- // on an stale but recycled handle would be harmless, but in practice this might
- // confuse other non-Sun code, so it's not a viable approach.
- //
- // 2: Once a win32 event handle is associated with an Event, it remains associated
- // with the Event. The event handle is never closed. This could be construed
- // as handle leakage, but only up to the maximum # of threads that have been extant
- // at any one time. This shouldn't be an issue, as windows platforms typically
- // permit a process to have hundreds of thousands of open handles.
- //
- // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList
- // and release unused handles.
- //
- // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle.
- // It's not clear, however, that we wouldn't be trading one type of leak for another.
- //
- // 5. Use an RCU-like mechanism (Read-Copy Update).
- // Or perhaps something similar to Maged Michael's "Hazard pointers".
- //
- // We use (2).
- //
- // TODO-FIXME:
- // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation.
- // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks
- // to recover from (or at least detect) the dreaded Windows 841176 bug.
- // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent
- // into a single win32 CreateEvent() handle.
- //
- // _Event transitions in park()
- // -1 => -1 : illegal
- // 1 => 0 : pass - return immediately
- // 0 => -1 : block
- //
- // _Event serves as a restricted-range semaphore :
- // -1 : thread is blocked
- // 0 : neutral - thread is running or ready
- // 1 : signaled - thread is running or ready
- //
- // Another possible encoding of _Event would be
- // with explicit "PARKED" and "SIGNALED" bits.
- int os::PlatformEvent::park (jlong Millis) {
- guarantee (_ParkHandle != NULL , "Invariant") ;
- guarantee (Millis > 0 , "Invariant") ;
- int v ;
- // CONSIDER: defer assigning a CreateEvent() handle to the Event until
- // the initial park() operation.
- for (;;) {
- v = _Event ;
- if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
- }
- guarantee ((v == 0) || (v == 1), "invariant") ;
- if (v != 0) return OS_OK ;
- // Do this the hard way by blocking ...
- // TODO: consider a brief spin here, gated on the success of recent
- // spin attempts by this thread.
- //
- // We decompose long timeouts into series of shorter timed waits.
- // Evidently large timo values passed in WaitForSingleObject() are problematic on some
- // versions of Windows. See EventWait() for details. This may be superstition. Or not.
- // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time
- // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from
- // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend
- // to happen early in the wait interval. Specifically, after a spurious wakeup (rv ==
- // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate
- // for the already waited time. This policy does not admit any new outcomes.
- // In the future, however, we might want to track the accumulated wait time and
- // adjust Millis accordingly if we encounter a spurious wakeup.
- const int MAXTIMEOUT = 0x10000000 ;
- DWORD rv = WAIT_TIMEOUT ;
- while (_Event < 0 && Millis > 0) {
- DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT)
- if (Millis > MAXTIMEOUT) {
- prd = MAXTIMEOUT ;
- }
- rv = ::WaitForSingleObject (_ParkHandle, prd) ;
- assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ;
- if (rv == WAIT_TIMEOUT) {
- Millis -= prd ;
- }
- }
- v = _Event ;
- _Event = 0 ;
- OrderAccess::fence() ;
- // If we encounter a nearly simultanous timeout expiry and unpark()
- // we return OS_OK indicating we awoke via unpark().
- // Implementor's license -- returning OS_TIMEOUT would be equally valid, however.
- return (v >= 0) ? OS_OK : OS_TIMEOUT ;
- }
- void os::PlatformEvent::park () {
- guarantee (_ParkHandle != NULL, "Invariant") ;
- // Invariant: Only the thread associated with the Event/PlatformEvent
- // may call park().
- int v ;
- for (;;) {
- v = _Event ;
- if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
- }
- guarantee ((v == 0) || (v == 1), "invariant") ;
- if (v != 0) return ;
- // Do this the hard way by blocking ...
- // TODO: consider a brief spin here, gated on the success of recent
- // spin attempts by this thread.
- while (_Event < 0) {
- DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ;
- assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ;
- }
- // Usually we'll find _Event == 0 at this point, but as
- // an optional optimization we clear it, just in case can
- // multiple unpark() operations drove _Event up to 1.
- _Event = 0 ;
- OrderAccess::fence() ;
- guarantee (_Event >= 0, "invariant") ;
- }
- void os::PlatformEvent::unpark() {
- guarantee (_ParkHandle != NULL, "Invariant") ;
- int v ;
- for (;;) {
- v = _Event ; // Increment _Event if it's < 1.
- if (v > 0) {
- // If it's already signaled just return.
- // The LD of _Event could have reordered or be satisfied
- // by a read-aside from this processor's write buffer.
- // To avoid problems execute a barrier and then
- // ratify the value. A degenerate CAS() would also work.
- // Viz., CAS (v+0, &_Event, v) == v).
- OrderAccess::fence() ;
- if (_Event == v) return ;
- continue ;
- }
- if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ;
- }
- if (v < 0) {
- ::SetEvent (_ParkHandle) ;
- }
- }
- // JSR166
- // -------------------------------------------------------
- /*
- * The Windows implementation of Park is very straightforward: Basic
- * operations on Win32 Events turn out to have the right semantics to
- * use them directly. We opportunistically resuse the event inherited
- * from Monitor.
- */
- void Parker::park(bool isAbsolute, jlong time) {
- guarantee (_ParkEvent != NULL, "invariant") ;
- // First, demultiplex/decode time arguments
- if (time < 0) { // don't wait
- return;
- }
- else if (time == 0 && !isAbsolute) {
- time = INFINITE;
- }
- else if (isAbsolute) {
- time -= os::javaTimeMillis(); // convert to relative time
- if (time <= 0) // already elapsed
- return;
- }
- else { // relative
- time /= 1000000; // Must coarsen from nanos to millis
- if (time == 0) // Wait for the minimal time unit if zero
- time = 1;
- }
- JavaThread* thread = (JavaThread*)(Thread::current());
- assert(thread->is_Java_thread(), "Must be JavaThread");
- JavaThread *jt = (JavaThread *)thread;
- // Don't wait if interrupted or already triggered
- if (Thread::is_interrupted(thread, false) ||
- WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) {
- ResetEvent(_ParkEvent);
- return;
- }
- else {
- ThreadBlockInVM tbivm(jt);
- OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
- jt->set_suspend_equivalent();
- WaitForSingleObject(_ParkEvent, time);
- ResetEvent(_ParkEvent);
- // If externally suspended while waiting, re-suspend
- if (jt->handle_special_suspend_equivalent_condition()) {
- jt->java_suspend_self();
- }
- }
- }
- void Parker::unpark() {
- guarantee (_ParkEvent != NULL, "invariant") ;
- SetEvent(_ParkEvent);
- }
- // Run the specified command in a separate process. Return its exit value,
- // or -1 on failure (e.g. can't create a new process).
- int os::fork_and_exec(char* cmd) {
- STARTUPINFO si;
- PROCESS_INFORMATION pi;
- memset(&si, 0, sizeof(si));
- si.cb = sizeof(si);
- memset(&pi, 0, sizeof(pi));
- BOOL rslt = CreateProcess(NULL, // executable name - use command line
- cmd, // command line
- NULL, // process security attribute
- NULL, // thread security attribute
- TRUE, // inherits system handles
- 0, // no creation flags
- NULL, // use parent's environment block
- NULL, // use parent's starting directory
- &si, // (in) startup information
- &pi); // (out) process information
- if (rslt) {
- // Wait until child process exits.
- WaitForSingleObject(pi.hProcess, INFINITE);
- DWORD exit_code;
- GetExitCodeProcess(pi.hProcess, &exit_code);
- // Close process and thread handles.
- CloseHandle(pi.hProcess);
- CloseHandle(pi.hThread);
- return (int)exit_code;
- } else {
- return -1;
- }
- }
- //--------------------------------------------------------------------------------------------------
- // Non-product code
- static int mallocDebugIntervalCounter = 0;
- static int mallocDebugCounter = 0;
- bool os::check_heap(bool force) {
- if (++mallocDebugCounter < MallocVerifyStart && !force) return true;
- if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) {
- // Note: HeapValidate executes two hardware breakpoints when it finds something
- // wrong; at these points, eax contains the address of the offending block (I think).
- // To get to the exlicit error message(s) below, just continue twice.
- HANDLE heap = GetProcessHeap();
- { HeapLock(heap);
- PROCESS_HEAP_ENTRY phe;
- phe.lpData = NULL;
- while (HeapWalk(heap, &phe) != 0) {
- if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) &&
- !HeapValidate(heap, 0, phe.lpData)) {
- tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter);
- tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData);
- fatal("corrupted C heap");
- }
- }
- int err = GetLastError();
- if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) {
- fatal(err_msg("heap walk aborted with error %d", err));
- }
- HeapUnlock(heap);
- }
- mallocDebugIntervalCounter = 0;
- }
- return true;
- }
- bool os::find(address addr, outputStream* st) {
- // Nothing yet
- return false;
- }
- LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) {
- DWORD exception_code = e->ExceptionRecord->ExceptionCode;
- if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
- JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow();
- PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord;
- address addr = (address) exceptionRecord->ExceptionInformation[1];
- if (os::is_memory_serialize_page(thread, addr))
- return EXCEPTION_CONTINUE_EXECUTION;
- }
- return EXCEPTION_CONTINUE_SEARCH;
- }
- static int getLastErrorString(char *buf, size_t len)
- {
- long errval;
- if ((errval = GetLastError()) != 0)
- {
- /* DOS error */
- size_t n = (size_t)FormatMessage(
- FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
- NULL,
- errval,
- 0,
- buf,
- (DWORD)len,
- NULL);
- if (n > 3) {
- /* Drop final '.', CR, LF */
- if (buf[n - 1] == '\n') n--;
- if (buf[n - 1] == '\r') n--;
- if (buf[n - 1] == '.') n--;
- buf[n] = '\0';
- }
- return (int)n;
- }
- if (errno != 0)
- {
- /* C runtime error that has no corresponding DOS error code */
- const char *s = strerror(errno);
- size_t n = strlen(s);
- if (n >= len) n = len - 1;
- strncpy(buf, s, n);
- buf[n] = '\0';
- return (int)n;
- }
- return 0;
- }
- // We don't build a headless jre for Windows
- bool os::is_headless_jre() { return false; }
- // OS_SocketInterface
- // Not used on Windows
- // OS_SocketInterface
- typedef struct hostent * (PASCAL FAR *ws2_ifn_ptr_t)(...);
- ws2_ifn_ptr_t *get_host_by_name_fn = NULL;
- typedef CRITICAL_SECTION mutex_t;
- #define mutexInit(m) InitializeCriticalSection(m)
- #define mutexDestroy(m) DeleteCriticalSection(m)
- #define mutexLock(m) EnterCriticalSection(m)
- #define mutexUnlock(m) LeaveCriticalSection(m)
- static bool sockfnptrs_initialized = FALSE;
- static mutex_t sockFnTableMutex;
- /* is Winsock2 loaded? better to be explicit than to rely on sockfnptrs */
- static bool winsock2Available = FALSE;
- static void initSockFnTable() {
- int (PASCAL FAR* WSAStartupPtr)(WORD, LPWSADATA);
- WSADATA wsadata;
- ::mutexInit(&sockFnTableMutex);
- ::mutexLock(&sockFnTableMutex);
- if (sockfnptrs_initialized == FALSE) {
- HMODULE hWinsock;
- /* try to load Winsock2, and if that fails, load Winsock */
- hWinsock = ::LoadLibrary("ws2_32.dll");
- if (hWinsock == NULL) {
- jio_fprintf(stderr, "Could not load Winsock 2 (error: %d)\n",
- ::GetLastError());
- return;
- }
- /* If we loaded a DLL, then we might as well initialize it. */
- WSAStartupPtr = (int (PASCAL FAR *)(WORD, LPWSADATA))
- ::GetProcAddress(hWinsock, "WSAStartup");
- if (WSAStartupPtr(MAKEWORD(1,1), &wsadata) != 0) {
- jio_fprintf(stderr, "Could not initialize Winsock\n");
- }
- get_host_by_name_fn
- = (ws2_ifn_ptr_t*) GetProcAddress(hWinsock, "gethostbyname");
- }
- assert(get_host_by_name_fn != NULL,
- "gethostbyname function not found");
- sockfnptrs_initialized = TRUE;
- ::mutexUnlock(&sockFnTableMutex);
- }
- struct hostent* os::get_host_by_name(char* name) {
- if (!sockfnptrs_initialized) {
- initSockFnTable();
- }
- assert(sockfnptrs_initialized == TRUE && get_host_by_name_fn != NULL,
- "sockfnptrs is not initialized or pointer to gethostbyname function is NULL");
- return (*get_host_by_name_fn)(name);
- }
- int os::socket_close(int fd) {
- ShouldNotReachHere();
- return 0;
- }
- int os::socket_available(int fd, jint *pbytes) {
- ShouldNotReachHere();
- return 0;
- }
- int os::socket(int domain, int type, int protocol) {
- ShouldNotReachHere();
- return 0;
- }
- int os::listen(int fd, int count) {
- ShouldNotReachHere();
- return 0;
- }
- int os::connect(int fd, struct sockaddr *him, int len) {
- ShouldNotReachHere();
- return 0;
- }
- int os::accept(int fd, struct sockaddr *him, int *len) {
- ShouldNotReachHere();
- return 0;
- }
- int os::sendto(int fd, char *buf, int len, int flags,
- struct sockaddr *to, int tolen) {
- ShouldNotReachHere();
- return 0;
- }
- int os::recvfrom(int fd, char *buf, int nBytes, int flags,
- sockaddr *from, int *fromlen) {
- ShouldNotReachHere();
- return 0;
- }
- int os::recv(int fd, char *buf, int nBytes, int flags) {
- ShouldNotReachHere();
- return 0;
- }
- int os::send(int fd, char *buf, int nBytes, int flags) {
- ShouldNotReachHere();
- return 0;
- }
- int os::raw_send(int fd, char *buf, int nBytes, int flags) {
- ShouldNotReachHere();
- return 0;
- }
- int os::timeout(int fd, long timeout) {
- ShouldNotReachHere();
- return 0;
- }
- int os::get_host_name(char* name, int namelen) {
- ShouldNotReachHere();
- return 0;
- }
- int os::socket_shutdown(int fd, int howto) {
- ShouldNotReachHere();
- return 0;
- }
- int os::bind(int fd, struct sockaddr *him, int len) {
- ShouldNotReachHere();
- return 0;
- }
- int os::get_sock_name(int fd, struct sockaddr *him, int *len) {
- ShouldNotReachHere();
- return 0;
- }
- int os::get_sock_opt(int fd, int level, int optname,
- char *optval, int* optlen) {
- ShouldNotReachHere();
- return 0;
- }
- int os::set_sock_opt(int fd, int level, int optname,
- const char *optval, int optlen) {
- ShouldNotReachHere();
- return 0;
- }