jdk6/jdk6/hotspot: src/os/windows/vm/os_windows.cpp@2c8e1acf0433 (annotated)

duke@0	/*
trims@1772	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@0	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@0	*
duke@0	* This code is free software; you can redistribute it and/or modify it
duke@0	* under the terms of the GNU General Public License version 2 only, as
duke@0	* published by the Free Software Foundation.
duke@0	*
duke@0	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@0	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@0	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@0	* version 2 for more details (a copy is included in the LICENSE file that
duke@0	* accompanied this code).
duke@0	*
duke@0	* You should have received a copy of the GNU General Public License version
duke@0	* 2 along with this work; if not, write to the Free Software Foundation,
duke@0	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@0	*
trims@1772	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1772	* or visit www.oracle.com if you need additional information or have any
trims@1772	* questions.
duke@0	*
duke@0	*/
duke@0
duke@0	#ifdef _WIN64
duke@0	// Must be at least Windows 2000 or XP to use VectoredExceptions
duke@0	#define _WIN32_WINNT 0x500
duke@0	#endif
duke@0
duke@0	// do not include precompiled header file
duke@0	# include "incls/_os_windows.cpp.incl"
duke@0
duke@0	#ifdef _DEBUG
duke@0	#include <crtdbg.h>
duke@0	#endif
duke@0
duke@0
duke@0	#include <windows.h>
duke@0	#include <sys/types.h>
duke@0	#include <sys/stat.h>
duke@0	#include <sys/timeb.h>
duke@0	#include <objidl.h>
duke@0	#include <shlobj.h>
duke@0
duke@0	#include <malloc.h>
duke@0	#include <signal.h>
duke@0	#include <direct.h>
duke@0	#include <errno.h>
duke@0	#include <fcntl.h>
duke@0	#include <io.h>
duke@0	#include <process.h> // For _beginthreadex(), _endthreadex()
duke@0	#include <imagehlp.h> // For os::dll_address_to_function_name
duke@0
duke@0	/* for enumerating dll libraries */
duke@0	#include <tlhelp32.h>
duke@0	#include <vdmdbg.h>
duke@0
duke@0	// for timer info max values which include all bits
duke@0	#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
duke@0
duke@0	// For DLL loading/load error detection
duke@0	// Values of PE COFF
duke@0	#define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c
duke@0	#define IMAGE_FILE_SIGNATURE_LENGTH 4
duke@0
duke@0	static HANDLE main_process;
duke@0	static HANDLE main_thread;
duke@0	static int main_thread_id;
duke@0
duke@0	static FILETIME process_creation_time;
duke@0	static FILETIME process_exit_time;
duke@0	static FILETIME process_user_time;
duke@0	static FILETIME process_kernel_time;
duke@0
duke@0	#ifdef _WIN64
duke@0	PVOID topLevelVectoredExceptionHandler = NULL;
duke@0	#endif
duke@0
duke@0	#ifdef _M_IA64
duke@0	#define __CPU__ ia64
duke@0	#elif _M_AMD64
duke@0	#define __CPU__ amd64
duke@0	#else
duke@0	#define __CPU__ i486
duke@0	#endif
duke@0
duke@0	// save DLL module handle, used by GetModuleFileName
duke@0
duke@0	HINSTANCE vm_lib_handle;
duke@0	static int getLastErrorString(char *buf, size_t len);
duke@0
duke@0	BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
duke@0	switch (reason) {
duke@0	case DLL_PROCESS_ATTACH:
duke@0	vm_lib_handle = hinst;
duke@0	if(ForceTimeHighResolution)
duke@0	timeBeginPeriod(1L);
duke@0	break;
duke@0	case DLL_PROCESS_DETACH:
duke@0	if(ForceTimeHighResolution)
duke@0	timeEndPeriod(1L);
duke@0	#ifdef _WIN64
duke@0	if (topLevelVectoredExceptionHandler != NULL) {
duke@0	RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler);
duke@0	topLevelVectoredExceptionHandler = NULL;
duke@0	}
duke@0	#endif
duke@0	break;
duke@0	default:
duke@0	break;
duke@0	}
duke@0	return true;
duke@0	}
duke@0
duke@0	static inline double fileTimeAsDouble(FILETIME* time) {
duke@0	const double high = (double) ((unsigned int) ~0);
duke@0	const double split = 10000000.0;
duke@0	double result = (time->dwLowDateTime / split) +
duke@0	time->dwHighDateTime * (high/split);
duke@0	return result;
duke@0	}
duke@0
duke@0	// Implementation of os
duke@0
duke@0	bool os::getenv(const char* name, char* buffer, int len) {
duke@0	int result = GetEnvironmentVariable(name, buffer, len);
duke@0	return result > 0 && result < len;
duke@0	}
duke@0
duke@0
duke@0	// No setuid programs under Windows.
duke@0	bool os::have_special_privileges() {
duke@0	return false;
duke@0	}
duke@0
duke@0
duke@0	// This method is a periodic task to check for misbehaving JNI applications
duke@0	// under CheckJNI, we can add any periodic checks here.
duke@0	// For Windows at the moment does nothing
duke@0	void os::run_periodic_checks() {
duke@0	return;
duke@0	}
duke@0
duke@0	#ifndef _WIN64
dcubed@1130	// previous UnhandledExceptionFilter, if there is one
dcubed@1130	static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL;
dcubed@1130
duke@0	LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo);
duke@0	#endif
duke@0	void os::init_system_properties_values() {
duke@0	/* sysclasspath, java_home, dll_dir */
duke@0	{
duke@0	char *home_path;
duke@0	char *dll_path;
duke@0	char *pslash;
duke@0	char *bin = "\\bin";
duke@0	char home_dir[MAX_PATH];
duke@0
duke@0	if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) {
duke@0	os::jvm_path(home_dir, sizeof(home_dir));
duke@0	// Found the full path to jvm[_g].dll.
duke@0	// Now cut the path to <java_home>/jre if we can.
duke@0	(strrchr(home_dir, '\\')) = '\0'; / get rid of \jvm.dll */
duke@0	pslash = strrchr(home_dir, '\\');
duke@0	if (pslash != NULL) {
duke@0	pslash = '\0'; / get rid of \{client\|server} */
duke@0	pslash = strrchr(home_dir, '\\');
duke@0	if (pslash != NULL)
duke@0	pslash = '\0'; / get rid of \bin */
duke@0	}
duke@0	}
duke@0
duke@0	home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1);
duke@0	if (home_path == NULL)
duke@0	return;
duke@0	strcpy(home_path, home_dir);
duke@0	Arguments::set_java_home(home_path);
duke@0
duke@0	dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1);
duke@0	if (dll_path == NULL)
duke@0	return;
duke@0	strcpy(dll_path, home_dir);
duke@0	strcat(dll_path, bin);
duke@0	Arguments::set_dll_dir(dll_path);
duke@0
duke@0	if (!set_boot_path('\\', ';'))
duke@0	return;
duke@0	}
duke@0
duke@0	/* library_path */
duke@0	#define EXT_DIR "\\lib\\ext"
duke@0	#define BIN_DIR "\\bin"
duke@0	#define PACKAGE_DIR "\\Sun\\Java"
duke@0	{
duke@0	/* Win32 library search order (See the documentation for LoadLibrary):
duke@0	*
duke@0	* 1. The directory from which application is loaded.
duke@0	* 2. The current directory
duke@0	* 3. The system wide Java Extensions directory (Java only)
duke@0	* 4. System directory (GetSystemDirectory)
duke@0	* 5. Windows directory (GetWindowsDirectory)
duke@0	* 6. The PATH environment variable
duke@0	*/
duke@0
duke@0	char *library_path;
duke@0	char tmp[MAX_PATH];
duke@0	char *path_str = ::getenv("PATH");
duke@0
duke@0	library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) +
duke@0	sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10);
duke@0
duke@0	library_path[0] = '\0';
duke@0
duke@0	GetModuleFileName(NULL, tmp, sizeof(tmp));
duke@0	*(strrchr(tmp, '\\')) = '\0';
duke@0	strcat(library_path, tmp);
duke@0
duke@0	strcat(library_path, ";.");
duke@0
duke@0	GetWindowsDirectory(tmp, sizeof(tmp));
duke@0	strcat(library_path, ";");
duke@0	strcat(library_path, tmp);
duke@0	strcat(library_path, PACKAGE_DIR BIN_DIR);
duke@0
duke@0	GetSystemDirectory(tmp, sizeof(tmp));
duke@0	strcat(library_path, ";");
duke@0	strcat(library_path, tmp);
duke@0
duke@0	GetWindowsDirectory(tmp, sizeof(tmp));
duke@0	strcat(library_path, ";");
duke@0	strcat(library_path, tmp);
duke@0
duke@0	if (path_str) {
duke@0	strcat(library_path, ";");
duke@0	strcat(library_path, path_str);
duke@0	}
duke@0
duke@0	Arguments::set_library_path(library_path);
duke@0	FREE_C_HEAP_ARRAY(char, library_path);
duke@0	}
duke@0
duke@0	/* Default extensions directory */
duke@0	{
duke@0	char path[MAX_PATH];
duke@0	char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1];
duke@0	GetWindowsDirectory(path, MAX_PATH);
duke@0	sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR,
duke@0	path, PACKAGE_DIR, EXT_DIR);
duke@0	Arguments::set_ext_dirs(buf);
duke@0	}
duke@0	#undef EXT_DIR
duke@0	#undef BIN_DIR
duke@0	#undef PACKAGE_DIR
duke@0
duke@0	/* Default endorsed standards directory. */
duke@0	{
duke@0	#define ENDORSED_DIR "\\lib\\endorsed"
duke@0	size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR);
duke@0	char * buf = NEW_C_HEAP_ARRAY(char, len);
duke@0	sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR);
duke@0	Arguments::set_endorsed_dirs(buf);
duke@0	#undef ENDORSED_DIR
duke@0	}
duke@0
duke@0	#ifndef _WIN64
dcubed@1130	// set our UnhandledExceptionFilter and save any previous one
dcubed@1130	prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception);
duke@0	#endif
duke@0
duke@0	// Done
duke@0	return;
duke@0	}
duke@0
duke@0	void os::breakpoint() {
duke@0	DebugBreak();
duke@0	}
duke@0
duke@0	// Invoked from the BREAKPOINT Macro
duke@0	extern "C" void breakpoint() {
duke@0	os::breakpoint();
duke@0	}
duke@0
duke@0	// Returns an estimate of the current stack pointer. Result must be guaranteed
duke@0	// to point into the calling threads stack, and be no lower than the current
duke@0	// stack pointer.
duke@0
duke@0	address os::current_stack_pointer() {
duke@0	int dummy;
duke@0	address sp = (address)&dummy;
duke@0	return sp;
duke@0	}
duke@0
duke@0	// os::current_stack_base()
duke@0	//
duke@0	// Returns the base of the stack, which is the stack's
duke@0	// starting address. This function must be called
duke@0	// while running on the stack of the thread being queried.
duke@0
duke@0	address os::current_stack_base() {
duke@0	MEMORY_BASIC_INFORMATION minfo;
duke@0	address stack_bottom;
duke@0	size_t stack_size;
duke@0
duke@0	VirtualQuery(&minfo, &minfo, sizeof(minfo));
duke@0	stack_bottom = (address)minfo.AllocationBase;
duke@0	stack_size = minfo.RegionSize;
duke@0
duke@0	// Add up the sizes of all the regions with the same
duke@0	// AllocationBase.
duke@0	while( 1 )
duke@0	{
duke@0	VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo));
duke@0	if ( stack_bottom == (address)minfo.AllocationBase )
duke@0	stack_size += minfo.RegionSize;
duke@0	else
duke@0	break;
duke@0	}
duke@0
duke@0	#ifdef _M_IA64
duke@0	// IA64 has memory and register stacks
duke@0	stack_size = stack_size / 2;
duke@0	#endif
duke@0	return stack_bottom + stack_size;
duke@0	}
duke@0
duke@0	size_t os::current_stack_size() {
duke@0	size_t sz;
duke@0	MEMORY_BASIC_INFORMATION minfo;
duke@0	VirtualQuery(&minfo, &minfo, sizeof(minfo));
duke@0	sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
duke@0	return sz;
duke@0	}
duke@0
ysr@678	struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
ysr@678	const struct tm* time_struct_ptr = localtime(clock);
ysr@678	if (time_struct_ptr != NULL) {
ysr@678	res = time_struct_ptr;
ysr@678	return res;
ysr@678	}
ysr@678	return NULL;
ysr@678	}
duke@0
duke@0	LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo);
duke@0
duke@0	// Thread start routine for all new Java threads
duke@0	static unsigned __stdcall java_start(Thread* thread) {
duke@0	// Try to randomize the cache line index of hot stack frames.
duke@0	// This helps when threads of the same stack traces evict each other's
duke@0	// cache lines. The threads can be either from the same JVM instance, or
duke@0	// from different JVM instances. The benefit is especially true for
duke@0	// processors with hyperthreading technology.
duke@0	static int counter = 0;
duke@0	int pid = os::current_process_id();
duke@0	_alloca(((pid ^ counter++) & 7) * 128);
duke@0
duke@0	OSThread* osthr = thread->osthread();
duke@0	assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
duke@0
duke@0	if (UseNUMA) {
duke@0	int lgrp_id = os::numa_get_group_id();
duke@0	if (lgrp_id != -1) {
duke@0	thread->set_lgrp_id(lgrp_id);
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	if (UseVectoredExceptions) {
duke@0	// If we are using vectored exception we don't need to set a SEH
duke@0	thread->run();
duke@0	}
duke@0	else {
duke@0	// Install a win32 structured exception handler around every thread created
duke@0	// by VM, so VM can genrate error dump when an exception occurred in non-
duke@0	// Java thread (e.g. VM thread).
duke@0	__try {
duke@0	thread->run();
duke@0	} __except(topLevelExceptionFilter(
duke@0	(_EXCEPTION_POINTERS*)_exception_info())) {
duke@0	// Nothing to do.
duke@0	}
duke@0	}
duke@0
duke@0	// One less thread is executing
duke@0	// When the VMThread gets here, the main thread may have already exited
duke@0	// which frees the CodeHeap containing the Atomic::add code
duke@0	if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
duke@0	Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count);
duke@0	}
duke@0
duke@0	return 0;
duke@0	}
duke@0
duke@0	static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) {
duke@0	// Allocate the OSThread object
duke@0	OSThread* osthread = new OSThread(NULL, NULL);
duke@0	if (osthread == NULL) return NULL;
duke@0
duke@0	// Initialize support for Java interrupts
duke@0	HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
duke@0	if (interrupt_event == NULL) {
duke@0	delete osthread;
duke@0	return NULL;
duke@0	}
duke@0	osthread->set_interrupt_event(interrupt_event);
duke@0
duke@0	// Store info on the Win32 thread into the OSThread
duke@0	osthread->set_thread_handle(thread_handle);
duke@0	osthread->set_thread_id(thread_id);
duke@0
duke@0	if (UseNUMA) {
duke@0	int lgrp_id = os::numa_get_group_id();
duke@0	if (lgrp_id != -1) {
duke@0	thread->set_lgrp_id(lgrp_id);
duke@0	}
duke@0	}
duke@0
duke@0	// Initial thread state is INITIALIZED, not SUSPENDED
duke@0	osthread->set_state(INITIALIZED);
duke@0
duke@0	return osthread;
duke@0	}
duke@0
duke@0
duke@0	bool os::create_attached_thread(JavaThread* thread) {
duke@0	#ifdef ASSERT
duke@0	thread->verify_not_published();
duke@0	#endif
duke@0	HANDLE thread_h;
duke@0	if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(),
duke@0	&thread_h, THREAD_ALL_ACCESS, false, 0)) {
duke@0	fatal("DuplicateHandle failed\n");
duke@0	}
duke@0	OSThread* osthread = create_os_thread(thread, thread_h,
duke@0	(int)current_thread_id());
duke@0	if (osthread == NULL) {
duke@0	return false;
duke@0	}
duke@0
duke@0	// Initial thread state is RUNNABLE
duke@0	osthread->set_state(RUNNABLE);
duke@0
duke@0	thread->set_osthread(osthread);
duke@0	return true;
duke@0	}
duke@0
duke@0	bool os::create_main_thread(JavaThread* thread) {
duke@0	#ifdef ASSERT
duke@0	thread->verify_not_published();
duke@0	#endif
duke@0	if (_starting_thread == NULL) {
duke@0	_starting_thread = create_os_thread(thread, main_thread, main_thread_id);
duke@0	if (_starting_thread == NULL) {
duke@0	return false;
duke@0	}
duke@0	}
duke@0
duke@0	// The primordial thread is runnable from the start)
duke@0	_starting_thread->set_state(RUNNABLE);
duke@0
duke@0	thread->set_osthread(_starting_thread);
duke@0	return true;
duke@0	}
duke@0
duke@0	// Allocate and initialize a new OSThread
duke@0	bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
duke@0	unsigned thread_id;
duke@0
duke@0	// Allocate the OSThread object
duke@0	OSThread* osthread = new OSThread(NULL, NULL);
duke@0	if (osthread == NULL) {
duke@0	return false;
duke@0	}
duke@0
duke@0	// Initialize support for Java interrupts
duke@0	HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
duke@0	if (interrupt_event == NULL) {
duke@0	delete osthread;
duke@0	return NULL;
duke@0	}
duke@0	osthread->set_interrupt_event(interrupt_event);
duke@0	osthread->set_interrupted(false);
duke@0
duke@0	thread->set_osthread(osthread);
duke@0
duke@0	if (stack_size == 0) {
duke@0	switch (thr_type) {
duke@0	case os::java_thread:
duke@0	// Java threads use ThreadStackSize which default value can be changed with the flag -Xss
duke@0	if (JavaThread::stack_size_at_create() > 0)
duke@0	stack_size = JavaThread::stack_size_at_create();
duke@0	break;
duke@0	case os::compiler_thread:
duke@0	if (CompilerThreadStackSize > 0) {
duke@0	stack_size = (size_t)(CompilerThreadStackSize * K);
duke@0	break;
duke@0	} // else fall through:
duke@0	// use VMThreadStackSize if CompilerThreadStackSize is not defined
duke@0	case os::vm_thread:
duke@0	case os::pgc_thread:
duke@0	case os::cgc_thread:
duke@0	case os::watcher_thread:
duke@0	if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
duke@0	break;
duke@0	}
duke@0	}
duke@0
duke@0	// Create the Win32 thread
duke@0	//
duke@0	// Contrary to what MSDN document says, "stack_size" in _beginthreadex()
duke@0	// does not specify stack size. Instead, it specifies the size of
duke@0	// initially committed space. The stack size is determined by
duke@0	// PE header in the executable. If the committed "stack_size" is larger
duke@0	// than default value in the PE header, the stack is rounded up to the
duke@0	// nearest multiple of 1MB. For example if the launcher has default
duke@0	// stack size of 320k, specifying any size less than 320k does not
duke@0	// affect the actual stack size at all, it only affects the initial
duke@0	// commitment. On the other hand, specifying 'stack_size' larger than
duke@0	// default value may cause significant increase in memory usage, because
duke@0	// not only the stack space will be rounded up to MB, but also the
duke@0	// entire space is committed upfront.
duke@0	//
duke@0	// Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION'
duke@0	// for CreateThread() that can treat 'stack_size' as stack size. However we
duke@0	// are not supposed to call CreateThread() directly according to MSDN
duke@0	// document because JVM uses C runtime library. The good news is that the
duke@0	// flag appears to work with _beginthredex() as well.
duke@0
duke@0	#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
duke@0	#define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000)
duke@0	#endif
duke@0
duke@0	HANDLE thread_handle =
duke@0	(HANDLE)_beginthreadex(NULL,
duke@0	(unsigned)stack_size,
duke@0	(unsigned (__stdcall )(void)) java_start,
duke@0	thread,
duke@0	CREATE_SUSPENDED \| STACK_SIZE_PARAM_IS_A_RESERVATION,
duke@0	&thread_id);
duke@0	if (thread_handle == NULL) {
duke@0	// perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again
duke@0	// without the flag.
duke@0	thread_handle =
duke@0	(HANDLE)_beginthreadex(NULL,
duke@0	(unsigned)stack_size,
duke@0	(unsigned (__stdcall )(void)) java_start,
duke@0	thread,
duke@0	CREATE_SUSPENDED,
duke@0	&thread_id);
duke@0	}
duke@0	if (thread_handle == NULL) {
duke@0	// Need to clean up stuff we've allocated so far
duke@0	CloseHandle(osthread->interrupt_event());
duke@0	thread->set_osthread(NULL);
duke@0	delete osthread;
duke@0	return NULL;
duke@0	}
duke@0
duke@0	Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count);
duke@0
duke@0	// Store info on the Win32 thread into the OSThread
duke@0	osthread->set_thread_handle(thread_handle);
duke@0	osthread->set_thread_id(thread_id);
duke@0
duke@0	// Initial thread state is INITIALIZED, not SUSPENDED
duke@0	osthread->set_state(INITIALIZED);
duke@0
duke@0	// The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
duke@0	return true;
duke@0	}
duke@0
duke@0
duke@0	// Free Win32 resources related to the OSThread
duke@0	void os::free_thread(OSThread* osthread) {
duke@0	assert(osthread != NULL, "osthread not set");
duke@0	CloseHandle(osthread->thread_handle());
duke@0	CloseHandle(osthread->interrupt_event());
duke@0	delete osthread;
duke@0	}
duke@0
duke@0
duke@0	static int has_performance_count = 0;
duke@0	static jlong first_filetime;
duke@0	static jlong initial_performance_count;
duke@0	static jlong performance_frequency;
duke@0
duke@0
duke@0	jlong as_long(LARGE_INTEGER x) {
duke@0	jlong result = 0; // initialization to avoid warning
duke@0	set_high(&result, x.HighPart);
duke@0	set_low(&result, x.LowPart);
duke@0	return result;
duke@0	}
duke@0
duke@0
duke@0	jlong os::elapsed_counter() {
duke@0	LARGE_INTEGER count;
duke@0	if (has_performance_count) {
duke@0	QueryPerformanceCounter(&count);
duke@0	return as_long(count) - initial_performance_count;
duke@0	} else {
duke@0	FILETIME wt;
duke@0	GetSystemTimeAsFileTime(&wt);
duke@0	return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime);
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	jlong os::elapsed_frequency() {
duke@0	if (has_performance_count) {
duke@0	return performance_frequency;
duke@0	} else {
duke@0	// the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
duke@0	return 10000000;
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	julong os::available_memory() {
duke@0	return win32::available_memory();
duke@0	}
duke@0
duke@0	julong os::win32::available_memory() {
poonam@1001	// Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
poonam@1001	// value if total memory is larger than 4GB
poonam@1001	MEMORYSTATUSEX ms;
poonam@1001	ms.dwLength = sizeof(ms);
poonam@1001	GlobalMemoryStatusEx(&ms);
poonam@1001
poonam@1001	return (julong)ms.ullAvailPhys;
duke@0	}
duke@0
duke@0	julong os::physical_memory() {
duke@0	return win32::physical_memory();
duke@0	}
duke@0
duke@0	julong os::allocatable_physical_memory(julong size) {
phh@78	#ifdef _LP64
phh@78	return size;
phh@78	#else
phh@78	// Limit to 1400m because of the 2gb address space wall
duke@0	return MIN2(size, (julong)1400*M);
phh@78	#endif
duke@0	}
duke@0
duke@0	// VC6 lacks DWORD_PTR
duke@0	#if _MSC_VER < 1300
duke@0	typedef UINT_PTR DWORD_PTR;
duke@0	#endif
duke@0
duke@0	int os::active_processor_count() {
duke@0	DWORD_PTR lpProcessAffinityMask = 0;
duke@0	DWORD_PTR lpSystemAffinityMask = 0;
duke@0	int proc_count = processor_count();
duke@0	if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
duke@0	GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {
duke@0	// Nof active processors is number of bits in process affinity mask
duke@0	int bitcount = 0;
duke@0	while (lpProcessAffinityMask != 0) {
duke@0	lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1);
duke@0	bitcount++;
duke@0	}
duke@0	return bitcount;
duke@0	} else {
duke@0	return proc_count;
duke@0	}
duke@0	}
duke@0
duke@0	bool os::distribute_processes(uint length, uint* distribution) {
duke@0	// Not yet implemented.
duke@0	return false;
duke@0	}
duke@0
duke@0	bool os::bind_to_processor(uint processor_id) {
duke@0	// Not yet implemented.
duke@0	return false;
duke@0	}
duke@0
duke@0	static void initialize_performance_counter() {
duke@0	LARGE_INTEGER count;
duke@0	if (QueryPerformanceFrequency(&count)) {
duke@0	has_performance_count = 1;
duke@0	performance_frequency = as_long(count);
duke@0	QueryPerformanceCounter(&count);
duke@0	initial_performance_count = as_long(count);
duke@0	} else {
duke@0	has_performance_count = 0;
duke@0	FILETIME wt;
duke@0	GetSystemTimeAsFileTime(&wt);
duke@0	first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	double os::elapsedTime() {
duke@0	return (double) elapsed_counter() / (double) elapsed_frequency();
duke@0	}
duke@0
duke@0
duke@0	// Windows format:
duke@0	// The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
duke@0	// Java format:
duke@0	// Java standards require the number of milliseconds since 1/1/1970
duke@0
duke@0	// Constant offset - calculated using offset()
duke@0	static jlong _offset = 116444736000000000;
duke@0	// Fake time counter for reproducible results when debugging
duke@0	static jlong fake_time = 0;
duke@0
duke@0	#ifdef ASSERT
duke@0	// Just to be safe, recalculate the offset in debug mode
duke@0	static jlong _calculated_offset = 0;
duke@0	static int _has_calculated_offset = 0;
duke@0
duke@0	jlong offset() {
duke@0	if (_has_calculated_offset) return _calculated_offset;
duke@0	SYSTEMTIME java_origin;
duke@0	java_origin.wYear = 1970;
duke@0	java_origin.wMonth = 1;
duke@0	java_origin.wDayOfWeek = 0; // ignored
duke@0	java_origin.wDay = 1;
duke@0	java_origin.wHour = 0;
duke@0	java_origin.wMinute = 0;
duke@0	java_origin.wSecond = 0;
duke@0	java_origin.wMilliseconds = 0;
duke@0	FILETIME jot;
duke@0	if (!SystemTimeToFileTime(&java_origin, &jot)) {
jcoomes@1700	fatal(err_msg("Error = %d\nWindows error", GetLastError()));
duke@0	}
duke@0	_calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime);
duke@0	_has_calculated_offset = 1;
duke@0	assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal");
duke@0	return _calculated_offset;
duke@0	}
duke@0	#else
duke@0	jlong offset() {
duke@0	return _offset;
duke@0	}
duke@0	#endif
duke@0
duke@0	jlong windows_to_java_time(FILETIME wt) {
duke@0	jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
duke@0	return (a - offset()) / 10000;
duke@0	}
duke@0
duke@0	FILETIME java_to_windows_time(jlong l) {
duke@0	jlong a = (l * 10000) + offset();
duke@0	FILETIME result;
duke@0	result.dwHighDateTime = high(a);
duke@0	result.dwLowDateTime = low(a);
duke@0	return result;
ysr@397	}
ysr@397
ysr@397	// For now, we say that Windows does not support vtime. I have no idea
ysr@397	// whether it can actually be made to (DLD, 9/13/05).
ysr@397
ysr@397	bool os::supports_vtime() { return false; }
ysr@397	bool os::enable_vtime() { return false; }
ysr@397	bool os::vtime_enabled() { return false; }
ysr@397	double os::elapsedVTime() {
ysr@397	// better than nothing, but not much
ysr@397	return elapsedTime();
duke@0	}
duke@0
duke@0	jlong os::javaTimeMillis() {
duke@0	if (UseFakeTimers) {
duke@0	return fake_time++;
duke@0	} else {
sbohne@119	FILETIME wt;
sbohne@119	GetSystemTimeAsFileTime(&wt);
sbohne@119	return windows_to_java_time(wt);
duke@0	}
duke@0	}
duke@0
duke@0	#define NANOS_PER_SEC CONST64(1000000000)
duke@0	#define NANOS_PER_MILLISEC 1000000
duke@0	jlong os::javaTimeNanos() {
duke@0	if (!has_performance_count) {
duke@0	return javaTimeMillis() * NANOS_PER_MILLISEC; // the best we can do.
duke@0	} else {
duke@0	LARGE_INTEGER current_count;
duke@0	QueryPerformanceCounter(&current_count);
duke@0	double current = as_long(current_count);
duke@0	double freq = performance_frequency;
duke@0	jlong time = (jlong)((current/freq) * NANOS_PER_SEC);
duke@0	return time;
duke@0	}
duke@0	}
duke@0
duke@0	void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
duke@0	if (!has_performance_count) {
duke@0	// javaTimeMillis() doesn't have much percision,
duke@0	// but it is not going to wrap -- so all 64 bits
duke@0	info_ptr->max_value = ALL_64_BITS;
duke@0
duke@0	// this is a wall clock timer, so may skip
duke@0	info_ptr->may_skip_backward = true;
duke@0	info_ptr->may_skip_forward = true;
duke@0	} else {
duke@0	jlong freq = performance_frequency;
duke@0	if (freq < NANOS_PER_SEC) {
duke@0	// the performance counter is 64 bits and we will
duke@0	// be multiplying it -- so no wrap in 64 bits
duke@0	info_ptr->max_value = ALL_64_BITS;
duke@0	} else if (freq > NANOS_PER_SEC) {
duke@0	// use the max value the counter can reach to
duke@0	// determine the max value which could be returned
duke@0	julong max_counter = (julong)ALL_64_BITS;
duke@0	info_ptr->max_value = (jlong)(max_counter / (freq / NANOS_PER_SEC));
duke@0	} else {
duke@0	// the performance counter is 64 bits and we will
duke@0	// be using it directly -- so no wrap in 64 bits
duke@0	info_ptr->max_value = ALL_64_BITS;
duke@0	}
duke@0
duke@0	// using a counter, so no skipping
duke@0	info_ptr->may_skip_backward = false;
duke@0	info_ptr->may_skip_forward = false;
duke@0	}
duke@0	info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time
duke@0	}
duke@0
duke@0	char* os::local_time_string(char *buf, size_t buflen) {
duke@0	SYSTEMTIME st;
duke@0	GetLocalTime(&st);
duke@0	jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
duke@0	st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
duke@0	return buf;
duke@0	}
duke@0
duke@0	bool os::getTimesSecs(double* process_real_time,
duke@0	double* process_user_time,
duke@0	double* process_system_time) {
duke@0	HANDLE h_process = GetCurrentProcess();
duke@0	FILETIME create_time, exit_time, kernel_time, user_time;
duke@0	BOOL result = GetProcessTimes(h_process,
duke@0	&create_time,
duke@0	&exit_time,
duke@0	&kernel_time,
duke@0	&user_time);
duke@0	if (result != 0) {
duke@0	FILETIME wt;
duke@0	GetSystemTimeAsFileTime(&wt);
duke@0	jlong rtc_millis = windows_to_java_time(wt);
duke@0	jlong user_millis = windows_to_java_time(user_time);
duke@0	jlong system_millis = windows_to_java_time(kernel_time);
duke@0	*process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS);
duke@0	*process_user_time = ((double) user_millis) / ((double) MILLIUNITS);
duke@0	*process_system_time = ((double) system_millis) / ((double) MILLIUNITS);
duke@0	return true;
duke@0	} else {
duke@0	return false;
duke@0	}
duke@0	}
duke@0
duke@0	void os::shutdown() {
duke@0
duke@0	// allow PerfMemory to attempt cleanup of any persistent resources
duke@0	perfMemory_exit();
duke@0
duke@0	// flush buffered output, finish log files
duke@0	ostream_abort();
duke@0
duke@0	// Check for abort hook
duke@0	abort_hook_t abort_hook = Arguments::abort_hook();
duke@0	if (abort_hook != NULL) {
duke@0	abort_hook();
duke@0	}
duke@0	}
duke@0
duke@0	void os::abort(bool dump_core)
duke@0	{
duke@0	os::shutdown();
duke@0	// no core dump on Windows
duke@0	::exit(1);
duke@0	}
duke@0
duke@0	// Die immediately, no exit hook, no abort hook, no cleanup.
duke@0	void os::die() {
duke@0	_exit(-1);
duke@0	}
duke@0
duke@0	// Directory routines copied from src/win32/native/java/io/dirent_md.c
duke@0	// * dirent_md.c 1.15 00/02/02
duke@0	//
duke@0	// The declarations for DIR and struct dirent are in jvm_win32.h.
duke@0
duke@0	/* Caller must have already run dirname through JVM_NativePath, which removes
duke@0	duplicate slashes and converts all instances of '/' into '\\'. */
duke@0
duke@0	DIR *
duke@0	os::opendir(const char *dirname)
duke@0	{
duke@0	assert(dirname != NULL, "just checking"); // hotspot change
duke@0	DIR dirp = (DIR )malloc(sizeof(DIR));
duke@0	DWORD fattr; // hotspot change
duke@0	char alt_dirname[4] = { 0, 0, 0, 0 };
duke@0
duke@0	if (dirp == 0) {
duke@0	errno = ENOMEM;
duke@0	return 0;
duke@0	}
duke@0
duke@0	/*
duke@0	* Win32 accepts "\" in its POSIX stat(), but refuses to treat it
duke@0	* as a directory in FindFirstFile(). We detect this case here and
duke@0	* prepend the current drive name.
duke@0	*/
duke@0	if (dirname[1] == '\0' && dirname[0] == '\\') {
duke@0	alt_dirname[0] = _getdrive() + 'A' - 1;
duke@0	alt_dirname[1] = ':';
duke@0	alt_dirname[2] = '\\';
duke@0	alt_dirname[3] = '\0';
duke@0	dirname = alt_dirname;
duke@0	}
duke@0
duke@0	dirp->path = (char *)malloc(strlen(dirname) + 5);
duke@0	if (dirp->path == 0) {
duke@0	free(dirp);
duke@0	errno = ENOMEM;
duke@0	return 0;
duke@0	}
duke@0	strcpy(dirp->path, dirname);
duke@0
duke@0	fattr = GetFileAttributes(dirp->path);
duke@0	if (fattr == 0xffffffff) {
duke@0	free(dirp->path);
duke@0	free(dirp);
duke@0	errno = ENOENT;
duke@0	return 0;
duke@0	} else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
duke@0	free(dirp->path);
duke@0	free(dirp);
duke@0	errno = ENOTDIR;
duke@0	return 0;
duke@0	}
duke@0
duke@0	/* Append ".", or possibly "\\.", to path */
duke@0	if (dirp->path[1] == ':'
duke@0	&& (dirp->path[2] == '\0'
duke@0	\|\| (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) {
duke@0	/* No '\\' needed for cases like "Z:" or "Z:\" */
duke@0	strcat(dirp->path, ".");
duke@0	} else {
duke@0	strcat(dirp->path, "\\.");
duke@0	}
duke@0
duke@0	dirp->handle = FindFirstFile(dirp->path, &dirp->find_data);
duke@0	if (dirp->handle == INVALID_HANDLE_VALUE) {
duke@0	if (GetLastError() != ERROR_FILE_NOT_FOUND) {
duke@0	free(dirp->path);
duke@0	free(dirp);
duke@0	errno = EACCES;
duke@0	return 0;
duke@0	}
duke@0	}
duke@0	return dirp;
duke@0	}
duke@0
duke@0	/* parameter dbuf unused on Windows */
duke@0
duke@0	struct dirent *
duke@0	os::readdir(DIR dirp, dirent dbuf)
duke@0	{
duke@0	assert(dirp != NULL, "just checking"); // hotspot change
duke@0	if (dirp->handle == INVALID_HANDLE_VALUE) {
duke@0	return 0;
duke@0	}
duke@0
duke@0	strcpy(dirp->dirent.d_name, dirp->find_data.cFileName);
duke@0
duke@0	if (!FindNextFile(dirp->handle, &dirp->find_data)) {
duke@0	if (GetLastError() == ERROR_INVALID_HANDLE) {
duke@0	errno = EBADF;
duke@0	return 0;
duke@0	}
duke@0	FindClose(dirp->handle);
duke@0	dirp->handle = INVALID_HANDLE_VALUE;
duke@0	}
duke@0
duke@0	return &dirp->dirent;
duke@0	}
duke@0
duke@0	int
duke@0	os::closedir(DIR *dirp)
duke@0	{
duke@0	assert(dirp != NULL, "just checking"); // hotspot change
duke@0	if (dirp->handle != INVALID_HANDLE_VALUE) {
duke@0	if (!FindClose(dirp->handle)) {
duke@0	errno = EBADF;
duke@0	return -1;
duke@0	}
duke@0	dirp->handle = INVALID_HANDLE_VALUE;
duke@0	}
duke@0	free(dirp->path);
duke@0	free(dirp);
duke@0	return 0;
duke@0	}
duke@0
duke@0	const char* os::dll_file_extension() { return ".dll"; }
duke@0
coleenp@1999	// This must be hard coded because it's the system's temporary
coleenp@1999	// directory not the java application's temp directory, ala java.io.tmpdir.
coleenp@1648	const char* os::get_temp_directory() {
coleenp@1648	static char path_buf[MAX_PATH];
coleenp@1648	if (GetTempPath(MAX_PATH, path_buf)>0)
coleenp@1648	return path_buf;
coleenp@1648	else{
coleenp@1648	path_buf[0]='\0';
coleenp@1648	return path_buf;
coleenp@1648	}
duke@0	}
duke@0
phh@819	static bool file_exists(const char* filename) {
phh@819	if (filename == NULL \|\| strlen(filename) == 0) {
phh@819	return false;
phh@819	}
phh@819	return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES;
phh@819	}
phh@819
phh@819	void os::dll_build_name(char *buffer, size_t buflen,
phh@819	const char* pname, const char* fname) {
phh@819	// Copied from libhpi
phh@819	const size_t pnamelen = pname ? strlen(pname) : 0;
phh@819	const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0;
phh@819
phh@819	// Quietly truncates on buffer overflow. Should be an error.
phh@819	if (pnamelen + strlen(fname) + 10 > buflen) {
phh@819	*buffer = '\0';
phh@819	return;
phh@819	}
phh@819
phh@819	if (pnamelen == 0) {
phh@819	jio_snprintf(buffer, buflen, "%s.dll", fname);
phh@819	} else if (c == ':' \|\| c == '\\') {
phh@819	jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname);
phh@819	} else if (strchr(pname, *os::path_separator()) != NULL) {
phh@819	int n;
phh@819	char** pelements = split_path(pname, &n);
phh@819	for (int i = 0 ; i < n ; i++) {
phh@819	char* path = pelements[i];
phh@819	// Really shouldn't be NULL, but check can't hurt
phh@819	size_t plen = (path == NULL) ? 0 : strlen(path);
phh@819	if (plen == 0) {
phh@819	continue; // skip the empty path values
phh@819	}
phh@819	const char lastchar = path[plen - 1];
phh@819	if (lastchar == ':' \|\| lastchar == '\\') {
phh@819	jio_snprintf(buffer, buflen, "%s%s.dll", path, fname);
phh@819	} else {
phh@819	jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname);
phh@819	}
phh@819	if (file_exists(buffer)) {
phh@819	break;
phh@819	}
phh@819	}
phh@819	// release the storage
phh@819	for (int i = 0 ; i < n ; i++) {
phh@819	if (pelements[i] != NULL) {
phh@819	FREE_C_HEAP_ARRAY(char, pelements[i]);
phh@819	}
phh@819	}
phh@819	if (pelements != NULL) {
phh@819	FREE_C_HEAP_ARRAY(char*, pelements);
phh@819	}
phh@819	} else {
phh@819	jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname);
phh@819	}
kamg@299	}
kamg@299
duke@0	// Needs to be in os specific directory because windows requires another
duke@0	// header file <direct.h>
duke@0	const char* os::get_current_directory(char *buf, int buflen) {
duke@0	return _getcwd(buf, buflen);
duke@0	}
duke@0
duke@0	//-----------------------------------------------------------
duke@0	// Helper functions for fatal error handler
duke@0
duke@0	// The following library functions are resolved dynamically at runtime:
duke@0
duke@0	// PSAPI functions, for Windows NT, 2000, XP
duke@0
duke@0	// psapi.h doesn't come with Visual Studio 6; it can be downloaded as Platform
duke@0	// SDK from Microsoft. Here are the definitions copied from psapi.h
duke@0	typedef struct _MODULEINFO {
duke@0	LPVOID lpBaseOfDll;
duke@0	DWORD SizeOfImage;
duke@0	LPVOID EntryPoint;
duke@0	} MODULEINFO, *LPMODULEINFO;
duke@0
duke@0	static BOOL (WINAPI _EnumProcessModules) ( HANDLE, HMODULE , DWORD, LPDWORD );
duke@0	static DWORD (WINAPI *_GetModuleFileNameEx) ( HANDLE, HMODULE, LPTSTR, DWORD );
duke@0	static BOOL (WINAPI *_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD );
duke@0
duke@0	// ToolHelp Functions, for Windows 95, 98 and ME
duke@0
duke@0	static HANDLE(WINAPI *_CreateToolhelp32Snapshot)(DWORD,DWORD) ;
duke@0	static BOOL (WINAPI *_Module32First) (HANDLE,LPMODULEENTRY32) ;
duke@0	static BOOL (WINAPI *_Module32Next) (HANDLE,LPMODULEENTRY32) ;
duke@0
duke@0	bool _has_psapi;
duke@0	bool _psapi_init = false;
duke@0	bool _has_toolhelp;
duke@0
duke@0	static bool _init_psapi() {
duke@0	HINSTANCE psapi = LoadLibrary( "PSAPI.DLL" ) ;
duke@0	if( psapi == NULL ) return false ;
duke@0
duke@0	_EnumProcessModules = CAST_TO_FN_PTR(
duke@0	BOOL(WINAPI )(HANDLE, HMODULE , DWORD, LPDWORD),
duke@0	GetProcAddress(psapi, "EnumProcessModules")) ;
duke@0	_GetModuleFileNameEx = CAST_TO_FN_PTR(
duke@0	DWORD (WINAPI *)(HANDLE, HMODULE, LPTSTR, DWORD),
duke@0	GetProcAddress(psapi, "GetModuleFileNameExA"));
duke@0	_GetModuleInformation = CAST_TO_FN_PTR(
duke@0	BOOL (WINAPI *)(HANDLE, HMODULE, LPMODULEINFO, DWORD),
duke@0	GetProcAddress(psapi, "GetModuleInformation"));
duke@0
duke@0	_has_psapi = (_EnumProcessModules && _GetModuleFileNameEx && _GetModuleInformation);
duke@0	_psapi_init = true;
duke@0	return _has_psapi;
duke@0	}
duke@0
duke@0	static bool _init_toolhelp() {
duke@0	HINSTANCE kernel32 = LoadLibrary("Kernel32.DLL") ;
duke@0	if (kernel32 == NULL) return false ;
duke@0
duke@0	_CreateToolhelp32Snapshot = CAST_TO_FN_PTR(
duke@0	HANDLE(WINAPI *)(DWORD,DWORD),
duke@0	GetProcAddress(kernel32, "CreateToolhelp32Snapshot"));
duke@0	_Module32First = CAST_TO_FN_PTR(
duke@0	BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32),
duke@0	GetProcAddress(kernel32, "Module32First" ));
duke@0	_Module32Next = CAST_TO_FN_PTR(
duke@0	BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32),
duke@0	GetProcAddress(kernel32, "Module32Next" ));
duke@0
duke@0	_has_toolhelp = (_CreateToolhelp32Snapshot && _Module32First && _Module32Next);
duke@0	return _has_toolhelp;
duke@0	}
duke@0
duke@0	#ifdef _WIN64
duke@0	// Helper routine which returns true if address in
duke@0	// within the NTDLL address space.
duke@0	//
duke@0	static bool _addr_in_ntdll( address addr )
duke@0	{
duke@0	HMODULE hmod;
duke@0	MODULEINFO minfo;
duke@0
duke@0	hmod = GetModuleHandle("NTDLL.DLL");
duke@0	if ( hmod == NULL ) return false;
duke@0	if ( !_GetModuleInformation( GetCurrentProcess(), hmod,
duke@0	&minfo, sizeof(MODULEINFO)) )
duke@0	return false;
duke@0
duke@0	if ( (addr >= minfo.lpBaseOfDll) &&
duke@0	(addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage)))
duke@0	return true;
duke@0	else
duke@0	return false;
duke@0	}
duke@0	#endif
duke@0
duke@0
duke@0	// Enumerate all modules for a given process ID
duke@0	//
duke@0	// Notice that Windows 95/98/Me and Windows NT/2000/XP have
duke@0	// different API for doing this. We use PSAPI.DLL on NT based
duke@0	// Windows and ToolHelp on 95/98/Me.
duke@0
duke@0	// Callback function that is called by enumerate_modules() on
duke@0	// every DLL module.
duke@0	// Input parameters:
duke@0	// int pid,
duke@0	// char* module_file_name,
duke@0	// address module_base_addr,
duke@0	// unsigned module_size,
duke@0	// void* param
duke@0	typedef int (EnumModulesCallbackFunc)(int, char , address, unsigned, void *);
duke@0
duke@0	// enumerate_modules for Windows NT, using PSAPI
duke@0	static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param)
duke@0	{
duke@0	HANDLE hProcess ;
duke@0
duke@0	# define MAX_NUM_MODULES 128
duke@0	HMODULE modules[MAX_NUM_MODULES];
duke@0	static char filename[ MAX_PATH ];
duke@0	int result = 0;
duke@0
duke@0	if (!_has_psapi && (_psapi_init \|\| !_init_psapi())) return 0;
duke@0
duke@0	hProcess = OpenProcess(PROCESS_QUERY_INFORMATION \| PROCESS_VM_READ,
duke@0	FALSE, pid ) ;
duke@0	if (hProcess == NULL) return 0;
duke@0
duke@0	DWORD size_needed;
duke@0	if (!_EnumProcessModules(hProcess, modules,
duke@0	sizeof(modules), &size_needed)) {
duke@0	CloseHandle( hProcess );
duke@0	return 0;
duke@0	}
duke@0
duke@0	// number of modules that are currently loaded
duke@0	int num_modules = size_needed / sizeof(HMODULE);
duke@0
duke@0	for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) {
duke@0	// Get Full pathname:
duke@0	if(!_GetModuleFileNameEx(hProcess, modules[i],
duke@0	filename, sizeof(filename))) {
duke@0	filename[0] = '\0';
duke@0	}
duke@0
duke@0	MODULEINFO modinfo;
duke@0	if (!_GetModuleInformation(hProcess, modules[i],
duke@0	&modinfo, sizeof(modinfo))) {
duke@0	modinfo.lpBaseOfDll = NULL;
duke@0	modinfo.SizeOfImage = 0;
duke@0	}
duke@0
duke@0	// Invoke callback function
duke@0	result = func(pid, filename, (address)modinfo.lpBaseOfDll,
duke@0	modinfo.SizeOfImage, param);
duke@0	if (result) break;
duke@0	}
duke@0
duke@0	CloseHandle( hProcess ) ;
duke@0	return result;
duke@0	}
duke@0
duke@0
duke@0	// enumerate_modules for Windows 95/98/ME, using TOOLHELP
duke@0	static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param)
duke@0	{
duke@0	HANDLE hSnapShot ;
duke@0	static MODULEENTRY32 modentry ;
duke@0	int result = 0;
duke@0
duke@0	if (!_has_toolhelp) return 0;
duke@0
duke@0	// Get a handle to a Toolhelp snapshot of the system
duke@0	hSnapShot = _CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ;
duke@0	if( hSnapShot == INVALID_HANDLE_VALUE ) {
duke@0	return FALSE ;
duke@0	}
duke@0
duke@0	// iterate through all modules
duke@0	modentry.dwSize = sizeof(MODULEENTRY32) ;
duke@0	bool not_done = _Module32First( hSnapShot, &modentry ) != 0;
duke@0
duke@0	while( not_done ) {
duke@0	// invoke the callback
duke@0	result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr,
duke@0	modentry.modBaseSize, param);
duke@0	if (result) break;
duke@0
duke@0	modentry.dwSize = sizeof(MODULEENTRY32) ;
duke@0	not_done = _Module32Next( hSnapShot, &modentry ) != 0;
duke@0	}
duke@0
duke@0	CloseHandle(hSnapShot);
duke@0	return result;
duke@0	}
duke@0
duke@0	int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param )
duke@0	{
duke@0	// Get current process ID if caller doesn't provide it.
duke@0	if (!pid) pid = os::current_process_id();
duke@0
duke@0	if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param);
duke@0	else return _enumerate_modules_windows(pid, func, param);
duke@0	}
duke@0
duke@0	struct _modinfo {
duke@0	address addr;
duke@0	char* full_path; // point to a char buffer
duke@0	int buflen; // size of the buffer
duke@0	address base_addr;
duke@0	};
duke@0
duke@0	static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr,
duke@0	unsigned size, void * param) {
duke@0	struct _modinfo pmod = (struct _modinfo )param;
duke@0	if (!pmod) return -1;
duke@0
duke@0	if (base_addr <= pmod->addr &&
duke@0	base_addr+size > pmod->addr) {
duke@0	// if a buffer is provided, copy path name to the buffer
duke@0	if (pmod->full_path) {
duke@0	jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname);
duke@0	}
duke@0	pmod->base_addr = base_addr;
duke@0	return 1;
duke@0	}
duke@0	return 0;
duke@0	}
duke@0
duke@0	bool os::dll_address_to_library_name(address addr, char* buf,
duke@0	int buflen, int* offset) {
duke@0	// NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
duke@0	// return the full path to the DLL file, sometimes it returns path
duke@0	// to the corresponding PDB file (debug info); sometimes it only
duke@0	// returns partial path, which makes life painful.
duke@0
duke@0	struct _modinfo mi;
duke@0	mi.addr = addr;
duke@0	mi.full_path = buf;
duke@0	mi.buflen = buflen;
duke@0	int pid = os::current_process_id();
duke@0	if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
duke@0	// buf already contains path name
duke@0	if (offset) *offset = addr - mi.base_addr;
duke@0	return true;
duke@0	} else {
duke@0	if (buf) buf[0] = '\0';
duke@0	if (offset) *offset = -1;
duke@0	return false;
duke@0	}
duke@0	}
duke@0
duke@0	bool os::dll_address_to_function_name(address addr, char *buf,
duke@0	int buflen, int *offset) {
duke@0	// Unimplemented on Windows - in order to use SymGetSymFromAddr(),
duke@0	// we need to initialize imagehlp/dbghelp, then load symbol table
duke@0	// for every module. That's too much work to do after a fatal error.
duke@0	// For an example on how to implement this function, see 1.4.2.
duke@0	if (offset) *offset = -1;
duke@0	if (buf) buf[0] = '\0';
duke@0	return false;
kamg@299	}
kamg@299
kamg@299	void* os::dll_lookup(void* handle, const char* name) {
kamg@299	return GetProcAddress((HMODULE)handle, name);
duke@0	}
duke@0
duke@0	// save the start and end address of jvm.dll into param[0] and param[1]
duke@0	static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr,
duke@0	unsigned size, void * param) {
duke@0	if (!param) return -1;
duke@0
duke@0	if (base_addr <= (address)_locate_jvm_dll &&
duke@0	base_addr+size > (address)_locate_jvm_dll) {
duke@0	((address*)param)[0] = base_addr;
duke@0	((address*)param)[1] = base_addr + size;
duke@0	return 1;
duke@0	}
duke@0	return 0;
duke@0	}
duke@0
duke@0	address vm_lib_location[2]; // start and end address of jvm.dll
duke@0
duke@0	// check if addr is inside jvm.dll
duke@0	bool os::address_is_in_vm(address addr) {
duke@0	if (!vm_lib_location[0] \|\| !vm_lib_location[1]) {
duke@0	int pid = os::current_process_id();
duke@0	if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) {
duke@0	assert(false, "Can't find jvm module.");
duke@0	return false;
duke@0	}
duke@0	}
duke@0
duke@0	return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]);
duke@0	}
duke@0
duke@0	// print module info; param is outputStream*
duke@0	static int _print_module(int pid, char* fname, address base,
duke@0	unsigned size, void* param) {
duke@0	if (!param) return -1;
duke@0
duke@0	outputStream* st = (outputStream*)param;
duke@0
duke@0	address end_addr = base + size;
duke@0	st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname);
duke@0	return 0;
duke@0	}
duke@0
duke@0	// Loads .dll/.so and
duke@0	// in case of error it checks if .dll/.so was built for the
duke@0	// same architecture as Hotspot is running on
duke@0	void * os::dll_load(const char name, char ebuf, int ebuflen)
duke@0	{
duke@0	void * result = LoadLibrary(name);
duke@0	if (result != NULL)
duke@0	{
duke@0	return result;
duke@0	}
duke@0
duke@0	long errcode = GetLastError();
duke@0	if (errcode == ERROR_MOD_NOT_FOUND) {
duke@0	strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
duke@0	ebuf[ebuflen-1]='\0';
duke@0	return NULL;
duke@0	}
duke@0
duke@0	// Parsing dll below
duke@0	// If we can read dll-info and find that dll was built
duke@0	// for an architecture other than Hotspot is running in
duke@0	// - then print to buffer "DLL was built for a different architecture"
duke@0	// else call getLastErrorString to obtain system error message
duke@0
duke@0	// Read system error message into ebuf
duke@0	// It may or may not be overwritten below (in the for loop and just above)
duke@0	getLastErrorString(ebuf, (size_t) ebuflen);
duke@0	ebuf[ebuflen-1]='\0';
duke@0	int file_descriptor=::open(name, O_RDONLY \| O_BINARY, 0);
duke@0	if (file_descriptor<0)
duke@0	{
duke@0	return NULL;
duke@0	}
duke@0
duke@0	uint32_t signature_offset;
duke@0	uint16_t lib_arch=0;
duke@0	bool failed_to_get_lib_arch=
duke@0	(
duke@0	//Go to position 3c in the dll
duke@0	(os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0)
duke@0	\|\|
duke@0	// Read loacation of signature
duke@0	(sizeof(signature_offset)!=
duke@0	(os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset))))
duke@0	\|\|
duke@0	//Go to COFF File Header in dll
duke@0	//that is located after"signature" (4 bytes long)
duke@0	(os::seek_to_file_offset(file_descriptor,
duke@0	signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0)
duke@0	\|\|
duke@0	//Read field that contains code of architecture
duke@0	// that dll was build for
duke@0	(sizeof(lib_arch)!=
duke@0	(os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch))))
duke@0	);
duke@0
duke@0	::close(file_descriptor);
duke@0	if (failed_to_get_lib_arch)
duke@0	{
duke@0	// file i/o error - report getLastErrorString(...) msg
duke@0	return NULL;
duke@0	}
duke@0
duke@0	typedef struct
duke@0	{
duke@0	uint16_t arch_code;
duke@0	char* arch_name;
duke@0	} arch_t;
duke@0
duke@0	static const arch_t arch_array[]={
duke@0	{IMAGE_FILE_MACHINE_I386, (char*)"IA 32"},
duke@0	{IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"},
duke@0	{IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"}
duke@0	};
duke@0	#if (defined _M_IA64)
duke@0	static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64;
duke@0	#elif (defined _M_AMD64)
duke@0	static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64;
duke@0	#elif (defined _M_IX86)
duke@0	static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386;
duke@0	#else
duke@0	#error Method os::dll_load requires that one of following \
duke@0	is defined :_M_IA64,_M_AMD64 or _M_IX86
duke@0	#endif
duke@0
duke@0
duke@0	// Obtain a string for printf operation
duke@0	// lib_arch_str shall contain string what platform this .dll was built for
duke@0	// running_arch_str shall string contain what platform Hotspot was built for
duke@0	char running_arch_str=NULL,lib_arch_str=NULL;
duke@0	for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++)
duke@0	{
duke@0	if (lib_arch==arch_array[i].arch_code)
duke@0	lib_arch_str=arch_array[i].arch_name;
duke@0	if (running_arch==arch_array[i].arch_code)
duke@0	running_arch_str=arch_array[i].arch_name;
duke@0	}
duke@0
duke@0	assert(running_arch_str,
duke@0	"Didn't find runing architecture code in arch_array");
duke@0
duke@0	// If the architure is right
duke@0	// but some other error took place - report getLastErrorString(...) msg
duke@0	if (lib_arch == running_arch)
duke@0	{
duke@0	return NULL;
duke@0	}
duke@0
duke@0	if (lib_arch_str!=NULL)
duke@0	{
duke@0	::_snprintf(ebuf, ebuflen-1,
duke@0	"Can't load %s-bit .dll on a %s-bit platform",
duke@0	lib_arch_str,running_arch_str);
duke@0	}
duke@0	else
duke@0	{
duke@0	// don't know what architecture this dll was build for
duke@0	::_snprintf(ebuf, ebuflen-1,
duke@0	"Can't load this .dll (machine code=0x%x) on a %s-bit platform",
duke@0	lib_arch,running_arch_str);
duke@0	}
duke@0
duke@0	return NULL;
duke@0	}
duke@0
duke@0
duke@0	void os::print_dll_info(outputStream *st) {
duke@0	int pid = os::current_process_id();
duke@0	st->print_cr("Dynamic libraries:");
duke@0	enumerate_modules(pid, _print_module, (void *)st);
duke@0	}
duke@0
xlu@330	// function pointer to Windows API "GetNativeSystemInfo".
xlu@330	typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO);
xlu@330	static GetNativeSystemInfo_func_type _GetNativeSystemInfo;
xlu@330
duke@0	void os::print_os_info(outputStream* st) {
xlu@330	st->print("OS:");
xlu@330
xlu@330	OSVERSIONINFOEX osvi;
xlu@330	ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
xlu@330	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
xlu@330
xlu@330	if (!GetVersionEx((OSVERSIONINFO *)&osvi)) {
xlu@330	st->print_cr("N/A");
xlu@330	return;
xlu@330	}
xlu@330
xlu@330	int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
xlu@330	if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
xlu@330	switch (os_vers) {
xlu@330	case 3051: st->print(" Windows NT 3.51"); break;
xlu@330	case 4000: st->print(" Windows NT 4.0"); break;
xlu@330	case 5000: st->print(" Windows 2000"); break;
xlu@330	case 5001: st->print(" Windows XP"); break;
xlu@330	case 5002:
asaha@1194	case 6000:
asaha@1194	case 6001: {
xlu@330	// Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
xlu@330	// find out whether we are running on 64 bit processor or not.
xlu@330	SYSTEM_INFO si;
xlu@330	ZeroMemory(&si, sizeof(SYSTEM_INFO));
xlu@330	// Check to see if _GetNativeSystemInfo has been initialized.
xlu@330	if (_GetNativeSystemInfo == NULL) {
xlu@330	HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll"));
xlu@330	_GetNativeSystemInfo =
xlu@330	CAST_TO_FN_PTR(GetNativeSystemInfo_func_type,
xlu@330	GetProcAddress(hKernel32,
xlu@330	"GetNativeSystemInfo"));
xlu@330	if (_GetNativeSystemInfo == NULL)
xlu@330	GetSystemInfo(&si);
xlu@330	} else {
xlu@330	_GetNativeSystemInfo(&si);
xlu@330	}
xlu@330	if (os_vers == 5002) {
xlu@330	if (osvi.wProductType == VER_NT_WORKSTATION &&
xlu@330	si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
xlu@330	st->print(" Windows XP x64 Edition");
xlu@330	else
xlu@330	st->print(" Windows Server 2003 family");
asaha@1194	} else if (os_vers == 6000) {
xlu@330	if (osvi.wProductType == VER_NT_WORKSTATION)
xlu@330	st->print(" Windows Vista");
xlu@330	else
xlu@330	st->print(" Windows Server 2008");
asaha@1194	if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
asaha@1194	st->print(" , 64 bit");
asaha@1194	} else if (os_vers == 6001) {
asaha@1194	if (osvi.wProductType == VER_NT_WORKSTATION) {
asaha@1194	st->print(" Windows 7");
asaha@1194	} else {
asaha@1104	st->print(" Windows Server 2008 R2");
asaha@1194	}
asaha@1194	if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
asaha@1194	st->print(" , 64 bit");
asaha@1194	} else { // future os
asaha@1194	// Unrecognized windows, print out its major and minor versions
asaha@1194	st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
xlu@330	if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
xlu@330	st->print(" , 64 bit");
xlu@330	}
xlu@330	break;
xlu@330	}
xlu@330	default: // future windows, print out its major and minor versions
xlu@330	st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
xlu@330	}
xlu@330	} else {
xlu@330	switch (os_vers) {
xlu@330	case 4000: st->print(" Windows 95"); break;
xlu@330	case 4010: st->print(" Windows 98"); break;
xlu@330	case 4090: st->print(" Windows Me"); break;
xlu@330	default: // future windows, print out its major and minor versions
xlu@330	st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
xlu@330	}
xlu@330	}
xlu@330	st->print(" Build %d", osvi.dwBuildNumber);
xlu@330	st->print(" %s", osvi.szCSDVersion); // service pack
xlu@330	st->cr();
duke@0	}
duke@0
duke@0	void os::print_memory_info(outputStream* st) {
duke@0	st->print("Memory:");
duke@0	st->print(" %dk page", os::vm_page_size()>>10);
duke@0
poonam@1001	// Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
poonam@1001	// value if total memory is larger than 4GB
poonam@1001	MEMORYSTATUSEX ms;
poonam@1001	ms.dwLength = sizeof(ms);
poonam@1001	GlobalMemoryStatusEx(&ms);
duke@0
duke@0	st->print(", physical %uk", os::physical_memory() >> 10);
duke@0	st->print("(%uk free)", os::available_memory() >> 10);
duke@0
poonam@1001	st->print(", swap %uk", ms.ullTotalPageFile >> 10);
poonam@1001	st->print("(%uk free)", ms.ullAvailPageFile >> 10);
duke@0	st->cr();
duke@0	}
duke@0
duke@0	void os::print_siginfo(outputStream st, void siginfo) {
duke@0	EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo;
duke@0	st->print("siginfo:");
duke@0	st->print(" ExceptionCode=0x%x", er->ExceptionCode);
duke@0
duke@0	if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
duke@0	er->NumberParameters >= 2) {
duke@0	switch (er->ExceptionInformation[0]) {
duke@0	case 0: st->print(", reading address"); break;
duke@0	case 1: st->print(", writing address"); break;
duke@0	default: st->print(", ExceptionInformation=" INTPTR_FORMAT,
duke@0	er->ExceptionInformation[0]);
duke@0	}
duke@0	st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]);
duke@0	} else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR &&
duke@0	er->NumberParameters >= 2 && UseSharedSpaces) {
duke@0	FileMapInfo* mapinfo = FileMapInfo::current_info();
duke@0	if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) {
duke@0	st->print("\n\nError accessing class data sharing archive." \
duke@0	" Mapped file inaccessible during execution, " \
duke@0	" possible disk/network problem.");
duke@0	}
duke@0	} else {
duke@0	int num = er->NumberParameters;
duke@0	if (num > 0) {
duke@0	st->print(", ExceptionInformation=");
duke@0	for (int i = 0; i < num; i++) {
duke@0	st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]);
duke@0	}
duke@0	}
duke@0	}
duke@0	st->cr();
duke@0	}
duke@0
duke@0	void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
duke@0	// do nothing
duke@0	}
duke@0
duke@0	static char saved_jvm_path[MAX_PATH] = {0};
duke@0
duke@0	// Find the full path to the current module, jvm.dll or jvm_g.dll
duke@0	void os::jvm_path(char *buf, jint buflen) {
duke@0	// Error checking.
duke@0	if (buflen < MAX_PATH) {
duke@0	assert(false, "must use a large-enough buffer");
duke@0	buf[0] = '\0';
duke@0	return;
duke@0	}
duke@0	// Lazy resolve the path to current module.
duke@0	if (saved_jvm_path[0] != 0) {
duke@0	strcpy(buf, saved_jvm_path);
duke@0	return;
duke@0	}
duke@0
duke@0	GetModuleFileName(vm_lib_handle, buf, buflen);
duke@0	strcpy(saved_jvm_path, buf);
duke@0	}
duke@0
duke@0
duke@0	void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
duke@0	#ifndef _WIN64
duke@0	st->print("_");
duke@0	#endif
duke@0	}
duke@0
duke@0
duke@0	void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
duke@0	#ifndef _WIN64
duke@0	st->print("@%d", args_size * sizeof(int));
duke@0	#endif
duke@0	}
duke@0
duke@0	// sun.misc.Signal
duke@0	// NOTE that this is a workaround for an apparent kernel bug where if
duke@0	// a signal handler for SIGBREAK is installed then that signal handler
duke@0	// takes priority over the console control handler for CTRL_CLOSE_EVENT.
duke@0	// See bug 4416763.
duke@0	static void (*sigbreakHandler)(int) = NULL;
duke@0
duke@0	static void UserHandler(int sig, void siginfo, void context) {
duke@0	os::signal_notify(sig);
duke@0	// We need to reinstate the signal handler each time...
duke@0	os::signal(sig, (void*)UserHandler);
duke@0	}
duke@0
duke@0	void* os::user_handler() {
duke@0	return (void*) UserHandler;
duke@0	}
duke@0
duke@0	void* os::signal(int signal_number, void* handler) {
duke@0	if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) {
duke@0	void (*oldHandler)(int) = sigbreakHandler;
duke@0	sigbreakHandler = (void (*)(int)) handler;
duke@0	return (void*) oldHandler;
duke@0	} else {
duke@0	return (void)::signal(signal_number, (void ()(int))handler);
duke@0	}
duke@0	}
duke@0
duke@0	void os::signal_raise(int signal_number) {
duke@0	raise(signal_number);
duke@0	}
duke@0
duke@0	// The Win32 C runtime library maps all console control events other than ^C
duke@0	// into SIGBREAK, which makes it impossible to distinguish ^BREAK from close,
duke@0	// logoff, and shutdown events. We therefore install our own console handler
duke@0	// that raises SIGTERM for the latter cases.
duke@0	//
duke@0	static BOOL WINAPI consoleHandler(DWORD event) {
duke@0	switch(event) {
duke@0	case CTRL_C_EVENT:
duke@0	if (is_error_reported()) {
duke@0	// Ctrl-C is pressed during error reporting, likely because the error
duke@0	// handler fails to abort. Let VM die immediately.
duke@0	os::die();
duke@0	}
duke@0
duke@0	os::signal_raise(SIGINT);
duke@0	return TRUE;
duke@0	break;
duke@0	case CTRL_BREAK_EVENT:
duke@0	if (sigbreakHandler != NULL) {
duke@0	(*sigbreakHandler)(SIGBREAK);
duke@0	}
duke@0	return TRUE;
duke@0	break;
duke@0	case CTRL_CLOSE_EVENT:
duke@0	case CTRL_LOGOFF_EVENT:
duke@0	case CTRL_SHUTDOWN_EVENT:
duke@0	os::signal_raise(SIGTERM);
duke@0	return TRUE;
duke@0	break;
duke@0	default:
duke@0	break;
duke@0	}
duke@0	return FALSE;
duke@0	}
duke@0
duke@0	/*
duke@0	* The following code is moved from os.cpp for making this
duke@0	* code platform specific, which it is by its very nature.
duke@0	*/
duke@0
duke@0	// Return maximum OS signal used + 1 for internal use only
duke@0	// Used as exit signal for signal_thread
duke@0	int os::sigexitnum_pd(){
duke@0	return NSIG;
duke@0	}
duke@0
duke@0	// a counter for each possible signal value, including signal_thread exit signal
duke@0	static volatile jint pending_signals[NSIG+1] = { 0 };
duke@0	static HANDLE sig_sem;
duke@0
duke@0	void os::signal_init_pd() {
duke@0	// Initialize signal structures
duke@0	memset((void*)pending_signals, 0, sizeof(pending_signals));
duke@0
duke@0	sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL);
duke@0
duke@0	// Programs embedding the VM do not want it to attempt to receive
duke@0	// events like CTRL_LOGOFF_EVENT, which are used to implement the
duke@0	// shutdown hooks mechanism introduced in 1.3. For example, when
duke@0	// the VM is run as part of a Windows NT service (i.e., a servlet
duke@0	// engine in a web server), the correct behavior is for any console
duke@0	// control handler to return FALSE, not TRUE, because the OS's
duke@0	// "final" handler for such events allows the process to continue if
duke@0	// it is a service (while terminating it if it is not a service).
duke@0	// To make this behavior uniform and the mechanism simpler, we
duke@0	// completely disable the VM's usage of these console events if -Xrs
duke@0	// (=ReduceSignalUsage) is specified. This means, for example, that
duke@0	// the CTRL-BREAK thread dump mechanism is also disabled in this
duke@0	// case. See bugs 4323062, 4345157, and related bugs.
duke@0
duke@0	if (!ReduceSignalUsage) {
duke@0	// Add a CTRL-C handler
duke@0	SetConsoleCtrlHandler(consoleHandler, TRUE);
duke@0	}
duke@0	}
duke@0
duke@0	void os::signal_notify(int signal_number) {
duke@0	BOOL ret;
duke@0
duke@0	Atomic::inc(&pending_signals[signal_number]);
duke@0	ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
duke@0	assert(ret != 0, "ReleaseSemaphore() failed");
duke@0	}
duke@0
duke@0	static int check_pending_signals(bool wait_for_signal) {
duke@0	DWORD ret;
duke@0	while (true) {
duke@0	for (int i = 0; i < NSIG + 1; i++) {
duke@0	jint n = pending_signals[i];
duke@0	if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
duke@0	return i;
duke@0	}
duke@0	}
duke@0	if (!wait_for_signal) {
duke@0	return -1;
duke@0	}
duke@0
duke@0	JavaThread *thread = JavaThread::current();
duke@0
duke@0	ThreadBlockInVM tbivm(thread);
duke@0
duke@0	bool threadIsSuspended;
duke@0	do {
duke@0	thread->set_suspend_equivalent();
duke@0	// cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
duke@0	ret = ::WaitForSingleObject(sig_sem, INFINITE);
duke@0	assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed");
duke@0
duke@0	// were we externally suspended while we were waiting?
duke@0	threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
duke@0	if (threadIsSuspended) {
duke@0	//
duke@0	// The semaphore has been incremented, but while we were waiting
duke@0	// another thread suspended us. We don't want to continue running
duke@0	// while suspended because that would surprise the thread that
duke@0	// suspended us.
duke@0	//
duke@0	ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
duke@0	assert(ret != 0, "ReleaseSemaphore() failed");
duke@0
duke@0	thread->java_suspend_self();
duke@0	}
duke@0	} while (threadIsSuspended);
duke@0	}
duke@0	}
duke@0
duke@0	int os::signal_lookup() {
duke@0	return check_pending_signals(false);
duke@0	}
duke@0
duke@0	int os::signal_wait() {
duke@0	return check_pending_signals(true);
duke@0	}
duke@0
duke@0	// Implicit OS exception handling
duke@0
duke@0	LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) {
duke@0	JavaThread* thread = JavaThread::current();
duke@0	// Save pc in thread
duke@0	#ifdef _M_IA64
duke@0	thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP);
duke@0	// Set pc to handler
duke@0	exceptionInfo->ContextRecord->StIIP = (DWORD64)handler;
duke@0	#elif _M_AMD64
duke@0	thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip);
duke@0	// Set pc to handler
duke@0	exceptionInfo->ContextRecord->Rip = (DWORD64)handler;
duke@0	#else
duke@0	thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip);
duke@0	// Set pc to handler
duke@0	exceptionInfo->ContextRecord->Eip = (LONG)handler;
duke@0	#endif
duke@0
duke@0	// Continue the execution
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0
duke@0
duke@0	// Used for PostMortemDump
duke@0	extern "C" void safepoints();
duke@0	extern "C" void find(int x);
duke@0	extern "C" void events();
duke@0
duke@0	// According to Windows API documentation, an illegal instruction sequence should generate
duke@0	// the 0xC000001C exception code. However, real world experience shows that occasionnaly
duke@0	// the execution of an illegal instruction can generate the exception code 0xC000001E. This
duke@0	// seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems).
duke@0
duke@0	#define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E
duke@0
duke@0	// From "Execution Protection in the Windows Operating System" draft 0.35
duke@0	// Once a system header becomes available, the "real" define should be
duke@0	// included or copied here.
duke@0	#define EXCEPTION_INFO_EXEC_VIOLATION 0x08
duke@0
duke@0	#define def_excpt(val) #val, val
duke@0
duke@0	struct siglabel {
duke@0	char *name;
duke@0	int number;
duke@0	};
duke@0
duke@0	struct siglabel exceptlabels[] = {
duke@0	def_excpt(EXCEPTION_ACCESS_VIOLATION),
duke@0	def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
duke@0	def_excpt(EXCEPTION_BREAKPOINT),
duke@0	def_excpt(EXCEPTION_SINGLE_STEP),
duke@0	def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED),
duke@0	def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND),
duke@0	def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO),
duke@0	def_excpt(EXCEPTION_FLT_INEXACT_RESULT),
duke@0	def_excpt(EXCEPTION_FLT_INVALID_OPERATION),
duke@0	def_excpt(EXCEPTION_FLT_OVERFLOW),
duke@0	def_excpt(EXCEPTION_FLT_STACK_CHECK),
duke@0	def_excpt(EXCEPTION_FLT_UNDERFLOW),
duke@0	def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO),
duke@0	def_excpt(EXCEPTION_INT_OVERFLOW),
duke@0	def_excpt(EXCEPTION_PRIV_INSTRUCTION),
duke@0	def_excpt(EXCEPTION_IN_PAGE_ERROR),
duke@0	def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION),
duke@0	def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2),
duke@0	def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION),
duke@0	def_excpt(EXCEPTION_STACK_OVERFLOW),
duke@0	def_excpt(EXCEPTION_INVALID_DISPOSITION),
duke@0	def_excpt(EXCEPTION_GUARD_PAGE),
duke@0	def_excpt(EXCEPTION_INVALID_HANDLE),
duke@0	NULL, 0
duke@0	};
duke@0
duke@0	const char* os::exception_name(int exception_code, char *buf, size_t size) {
duke@0	for (int i = 0; exceptlabels[i].name != NULL; i++) {
duke@0	if (exceptlabels[i].number == exception_code) {
duke@0	jio_snprintf(buf, size, "%s", exceptlabels[i].name);
duke@0	return buf;
duke@0	}
duke@0	}
duke@0
duke@0	return NULL;
duke@0	}
duke@0
duke@0	//-----------------------------------------------------------------------------
duke@0	LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
duke@0	// handle exception caused by idiv; should only happen for -MinInt/-1
duke@0	// (division by zero is handled explicitly)
duke@0	#ifdef _M_IA64
duke@0	assert(0, "Fix Handle_IDiv_Exception");
duke@0	#elif _M_AMD64
duke@0	PCONTEXT ctx = exceptionInfo->ContextRecord;
duke@0	address pc = (address)ctx->Rip;
duke@0	NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc));
duke@0	assert(pc[0] == 0xF7, "not an idiv opcode");
duke@0	assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
duke@0	assert(ctx->Rax == min_jint, "unexpected idiv exception");
duke@0	// set correct result values and continue after idiv instruction
duke@0	ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
duke@0	ctx->Rax = (DWORD)min_jint; // result
duke@0	ctx->Rdx = (DWORD)0; // remainder
duke@0	// Continue the execution
duke@0	#else
duke@0	PCONTEXT ctx = exceptionInfo->ContextRecord;
duke@0	address pc = (address)ctx->Eip;
duke@0	NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc));
duke@0	assert(pc[0] == 0xF7, "not an idiv opcode");
duke@0	assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
duke@0	assert(ctx->Eax == min_jint, "unexpected idiv exception");
duke@0	// set correct result values and continue after idiv instruction
duke@0	ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
duke@0	ctx->Eax = (DWORD)min_jint; // result
duke@0	ctx->Edx = (DWORD)0; // remainder
duke@0	// Continue the execution
duke@0	#endif
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0
duke@0	#ifndef _WIN64
duke@0	//-----------------------------------------------------------------------------
duke@0	LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
dcubed@1130	// handle exception caused by native method modifying control word
duke@0	PCONTEXT ctx = exceptionInfo->ContextRecord;
duke@0	DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
duke@0
duke@0	switch (exception_code) {
duke@0	case EXCEPTION_FLT_DENORMAL_OPERAND:
duke@0	case EXCEPTION_FLT_DIVIDE_BY_ZERO:
duke@0	case EXCEPTION_FLT_INEXACT_RESULT:
duke@0	case EXCEPTION_FLT_INVALID_OPERATION:
duke@0	case EXCEPTION_FLT_OVERFLOW:
duke@0	case EXCEPTION_FLT_STACK_CHECK:
duke@0	case EXCEPTION_FLT_UNDERFLOW:
duke@0	jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std());
duke@0	if (fp_control_word != ctx->FloatSave.ControlWord) {
duke@0	// Restore FPCW and mask out FLT exceptions
duke@0	ctx->FloatSave.ControlWord = fp_control_word \| 0xffffffc0;
duke@0	// Mask out pending FLT exceptions
duke@0	ctx->FloatSave.StatusWord &= 0xffffff00;
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0	}
dcubed@1130
dcubed@1130	if (prev_uef_handler != NULL) {
dcubed@1130	// We didn't handle this exception so pass it to the previous
dcubed@1130	// UnhandledExceptionFilter.
dcubed@1130	return (prev_uef_handler)(exceptionInfo);
dcubed@1130	}
dcubed@1130
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0	#else //_WIN64
duke@0	/*
duke@0	On Windows, the mxcsr control bits are non-volatile across calls
duke@0	See also CR 6192333
duke@0	If EXCEPTION_FLT_* happened after some native method modified
duke@0	mxcsr - it is not a jvm fault.
duke@0	However should we decide to restore of mxcsr after a faulty
duke@0	native method we can uncomment following code
duke@0	jint MxCsr = INITIAL_MXCSR;
duke@0	// we can't use StubRoutines::addr_mxcsr_std()
duke@0	// because in Win64 mxcsr is not saved there
duke@0	if (MxCsr != ctx->MxCsr) {
duke@0	ctx->MxCsr = MxCsr;
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0
duke@0	*/
duke@0	#endif //_WIN64
duke@0
duke@0
duke@0	// Fatal error reporting is single threaded so we can make this a
duke@0	// static and preallocated. If it's more than MAX_PATH silently ignore
duke@0	// it.
duke@0	static char saved_error_file[MAX_PATH] = {0};
duke@0
duke@0	void os::set_error_file(const char *logfile) {
duke@0	if (strlen(logfile) <= MAX_PATH) {
duke@0	strncpy(saved_error_file, logfile, MAX_PATH);
duke@0	}
duke@0	}
duke@0
duke@0	static inline void report_error(Thread* t, DWORD exception_code,
duke@0	address addr, void* siginfo, void* context) {
duke@0	VMError err(t, exception_code, addr, siginfo, context);
duke@0	err.report_and_die();
duke@0
duke@0	// If UseOsErrorReporting, this will return here and save the error file
duke@0	// somewhere where we can find it in the minidump.
duke@0	}
duke@0
duke@0	//-----------------------------------------------------------------------------
duke@0	LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
duke@0	if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH;
duke@0	DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
duke@0	#ifdef _M_IA64
duke@0	address pc = (address) exceptionInfo->ContextRecord->StIIP;
duke@0	#elif _M_AMD64
duke@0	address pc = (address) exceptionInfo->ContextRecord->Rip;
duke@0	#else
duke@0	address pc = (address) exceptionInfo->ContextRecord->Eip;
duke@0	#endif
duke@0	Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady
duke@0
duke@0	#ifndef _WIN64
duke@0	// Execution protection violation - win32 running on AMD64 only
duke@0	// Handled first to avoid misdiagnosis as a "normal" access violation;
duke@0	// This is safe to do because we have a new/unique ExceptionInformation
duke@0	// code for this condition.
duke@0	if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
duke@0	PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
duke@0	int exception_subcode = (int) exceptionRecord->ExceptionInformation[0];
duke@0	address addr = (address) exceptionRecord->ExceptionInformation[1];
duke@0
duke@0	if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) {
duke@0	int page_size = os::vm_page_size();
duke@0
duke@0	// Make sure the pc and the faulting address are sane.
duke@0	//
duke@0	// If an instruction spans a page boundary, and the page containing
duke@0	// the beginning of the instruction is executable but the following
duke@0	// page is not, the pc and the faulting address might be slightly
duke@0	// different - we still want to unguard the 2nd page in this case.
duke@0	//
duke@0	// 15 bytes seems to be a (very) safe value for max instruction size.
duke@0	bool pc_is_near_addr =
duke@0	(pointer_delta((void) addr, (void) pc, sizeof(char)) < 15);
duke@0	bool instr_spans_page_boundary =
duke@0	(align_size_down((intptr_t) pc ^ (intptr_t) addr,
duke@0	(intptr_t) page_size) > 0);
duke@0
duke@0	if (pc == addr \|\| (pc_is_near_addr && instr_spans_page_boundary)) {
duke@0	static volatile address last_addr =
duke@0	(address) os::non_memory_address_word();
duke@0
duke@0	// In conservative mode, don't unguard unless the address is in the VM
duke@0	if (UnguardOnExecutionViolation > 0 && addr != last_addr &&
duke@0	(UnguardOnExecutionViolation > 1 \|\| os::address_is_in_vm(addr))) {
duke@0
coleenp@533	// Set memory to RWX and retry
duke@0	address page_start =
duke@0	(address) align_size_down((intptr_t) addr, (intptr_t) page_size);
coleenp@533	bool res = os::protect_memory((char*) page_start, page_size,
coleenp@533	os::MEM_PROT_RWX);
duke@0
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	char buf[256];
duke@0	jio_snprintf(buf, sizeof(buf), "Execution protection violation "
duke@0	"at " INTPTR_FORMAT
duke@0	", unguarding " INTPTR_FORMAT ": %s", addr,
duke@0	page_start, (res ? "success" : strerror(errno)));
duke@0	tty->print_raw_cr(buf);
duke@0	}
duke@0
duke@0	// Set last_addr so if we fault again at the same address, we don't
duke@0	// end up in an endless loop.
duke@0	//
duke@0	// There are two potential complications here. Two threads trapping
duke@0	// at the same address at the same time could cause one of the
duke@0	// threads to think it already unguarded, and abort the VM. Likely
duke@0	// very rare.
duke@0	//
duke@0	// The other race involves two threads alternately trapping at
duke@0	// different addresses and failing to unguard the page, resulting in
duke@0	// an endless loop. This condition is probably even more unlikely
duke@0	// than the first.
duke@0	//
duke@0	// Although both cases could be avoided by using locks or thread
duke@0	// local last_addr, these solutions are unnecessary complication:
duke@0	// this handler is a best-effort safety net, not a complete solution.
duke@0	// It is disabled by default and should only be used as a workaround
duke@0	// in case we missed any no-execute-unsafe VM code.
duke@0
duke@0	last_addr = addr;
duke@0
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0	}
duke@0
duke@0	// Last unguard failed or not unguarding
duke@0	tty->print_raw_cr("Execution protection violation");
duke@0	report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0	}
duke@0	#endif // _WIN64
duke@0
duke@0	// Check to see if we caught the safepoint code in the
duke@0	// process of write protecting the memory serialization page.
duke@0	// It write enables the page immediately after protecting it
duke@0	// so just return.
duke@0	if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
duke@0	JavaThread* thread = (JavaThread*) t;
duke@0	PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
duke@0	address addr = (address) exceptionRecord->ExceptionInformation[1];
duke@0	if ( os::is_memory_serialize_page(thread, addr) ) {
duke@0	// Block current thread until the memory serialize page permission restored.
duke@0	os::block_on_serialize_page_trap();
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	if (t != NULL && t->is_Java_thread()) {
duke@0	JavaThread* thread = (JavaThread*) t;
duke@0	bool in_java = thread->thread_state() == _thread_in_Java;
duke@0
duke@0	// Handle potential stack overflows up front.
duke@0	if (exception_code == EXCEPTION_STACK_OVERFLOW) {
duke@0	if (os::uses_stack_guard_pages()) {
duke@0	#ifdef _M_IA64
duke@0	//
duke@0	// If it's a legal stack address continue, Windows will map it in.
duke@0	//
duke@0	PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
duke@0	address addr = (address) exceptionRecord->ExceptionInformation[1];
duke@0	if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() )
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0
duke@0	// The register save area is the same size as the memory stack
duke@0	// and starts at the page just above the start of the memory stack.
duke@0	// If we get a fault in this area, we've run out of register
duke@0	// stack. If we are in java, try throwing a stack overflow exception.
duke@0	if (addr > thread->stack_base() &&
duke@0	addr <= (thread->stack_base()+thread->stack_size()) ) {
duke@0	char buf[256];
duke@0	jio_snprintf(buf, sizeof(buf),
duke@0	"Register stack overflow, addr:%p, stack_base:%p\n",
duke@0	addr, thread->stack_base() );
duke@0	tty->print_raw_cr(buf);
duke@0	// If not in java code, return and hope for the best.
duke@0	return in_java ? Handle_Exception(exceptionInfo,
duke@0	SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
duke@0	: EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0	#endif
duke@0	if (thread->stack_yellow_zone_enabled()) {
duke@0	// Yellow zone violation. The o/s has unprotected the first yellow
duke@0	// zone page for us. Note: must call disable_stack_yellow_zone to
duke@0	// update the enabled status, even if the zone contains only one page.
duke@0	thread->disable_stack_yellow_zone();
duke@0	// If not in java code, return and hope for the best.
duke@0	return in_java ? Handle_Exception(exceptionInfo,
duke@0	SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
duke@0	: EXCEPTION_CONTINUE_EXECUTION;
duke@0	} else {
duke@0	// Fatal red zone violation.
duke@0	thread->disable_stack_red_zone();
duke@0	tty->print_raw_cr("An unrecoverable stack overflow has occurred.");
duke@0	report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0	} else if (in_java) {
duke@0	// JVM-managed guard pages cannot be used on win95/98. The o/s provides
duke@0	// a one-time-only guard page, which it has released to us. The next
duke@0	// stack overflow on this thread will result in an ACCESS_VIOLATION.
duke@0	return Handle_Exception(exceptionInfo,
duke@0	SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
duke@0	} else {
duke@0	// Can only return and hope for the best. Further stack growth will
duke@0	// result in an ACCESS_VIOLATION.
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0	} else if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
duke@0	// Either stack overflow or null pointer exception.
duke@0	if (in_java) {
duke@0	PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
duke@0	address addr = (address) exceptionRecord->ExceptionInformation[1];
duke@0	address stack_end = thread->stack_base() - thread->stack_size();
duke@0	if (addr < stack_end && addr >= stack_end - os::vm_page_size()) {
duke@0	// Stack overflow.
duke@0	assert(!os::uses_stack_guard_pages(),
duke@0	"should be caught by red zone code above.");
duke@0	return Handle_Exception(exceptionInfo,
duke@0	SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
duke@0	}
duke@0	//
duke@0	// Check for safepoint polling and implicit null
duke@0	// We only expect null pointers in the stubs (vtable)
duke@0	// the rest are checked explicitly now.
duke@0	//
duke@0	CodeBlob* cb = CodeCache::find_blob(pc);
duke@0	if (cb != NULL) {
duke@0	if (os::is_poll_address(addr)) {
duke@0	address stub = SharedRuntime::get_poll_stub(pc);
duke@0	return Handle_Exception(exceptionInfo, stub);
duke@0	}
duke@0	}
duke@0	{
duke@0	#ifdef _WIN64
duke@0	//
duke@0	// If it's a legal stack address map the entire region in
duke@0	//
duke@0	PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
duke@0	address addr = (address) exceptionRecord->ExceptionInformation[1];
duke@0	if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
duke@0	addr = (address)((uintptr_t)addr &
duke@0	(~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
coleenp@783	os::commit_memory((char *)addr, thread->stack_base() - addr,
coleenp@783	false );
duke@0	return EXCEPTION_CONTINUE_EXECUTION;
duke@0	}
duke@0	else
duke@0	#endif
duke@0	{
duke@0	// Null pointer exception.
duke@0	#ifdef _M_IA64
duke@0	// We catch register stack overflows in compiled code by doing
duke@0	// an explicit compare and executing a st8(G0, G0) if the
duke@0	// BSP enters into our guard area. We test for the overflow
duke@0	// condition and fall into the normal null pointer exception
duke@0	// code if BSP hasn't overflowed.
duke@0	if ( in_java ) {
duke@0	if(thread->register_stack_overflow()) {
duke@0	assert((address)exceptionInfo->ContextRecord->IntS3 ==
duke@0	thread->register_stack_limit(),
duke@0	"GR7 doesn't contain register_stack_limit");
duke@0	// Disable the yellow zone which sets the state that
duke@0	// we've got a stack overflow problem.
duke@0	if (thread->stack_yellow_zone_enabled()) {
duke@0	thread->disable_stack_yellow_zone();
duke@0	}
duke@0	// Give us some room to process the exception
duke@0	thread->disable_register_stack_guard();
duke@0	// Update GR7 with the new limit so we can continue running
duke@0	// compiled code.
duke@0	exceptionInfo->ContextRecord->IntS3 =
duke@0	(ULONGLONG)thread->register_stack_limit();
duke@0	return Handle_Exception(exceptionInfo,
duke@0	SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
duke@0	} else {
duke@0	//
duke@0	// Check for implicit null
duke@0	// We only expect null pointers in the stubs (vtable)
duke@0	// the rest are checked explicitly now.
duke@0	//
poonam@523	if (((uintptr_t)addr) < os::vm_page_size() ) {
poonam@523	// an access to the first page of VM--assume it is a null pointer
poonam@523	address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
poonam@523	if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
duke@0	}
duke@0	}
duke@0	} // in_java
duke@0
duke@0	// IA64 doesn't use implicit null checking yet. So we shouldn't
duke@0	// get here.
duke@0	tty->print_raw_cr("Access violation, possible null pointer exception");
duke@0	report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	#else /* !IA64 */
duke@0
duke@0	// Windows 98 reports faulting addresses incorrectly
duke@0	if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) \|\|
duke@0	!os::win32::is_nt()) {
poonam@523	address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
poonam@523	if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
duke@0	}
duke@0	report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	#endif
duke@0	}
duke@0	}
duke@0	}
duke@0
duke@0	#ifdef _WIN64
duke@0	// Special care for fast JNI field accessors.
duke@0	// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks
duke@0	// in and the heap gets shrunk before the field access.
duke@0	if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
duke@0	address addr = JNI_FastGetField::find_slowcase_pc(pc);
duke@0	if (addr != (address)-1) {
duke@0	return Handle_Exception(exceptionInfo, addr);
duke@0	}
duke@0	}
duke@0	#endif
duke@0
duke@0	#ifdef _WIN64
duke@0	// Windows will sometimes generate an access violation
duke@0	// when we call malloc. Since we use VectoredExceptions
duke@0	// on 64 bit platforms, we see this exception. We must
duke@0	// pass this exception on so Windows can recover.
duke@0	// We check to see if the pc of the fault is in NTDLL.DLL
duke@0	// if so, we pass control on to Windows for handling.
duke@0	if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH;
duke@0	#endif
duke@0
duke@0	// Stack overflow or null pointer exception in native code.
duke@0	report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0
duke@0	if (in_java) {
duke@0	switch (exception_code) {
duke@0	case EXCEPTION_INT_DIVIDE_BY_ZERO:
duke@0	return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO));
duke@0
duke@0	case EXCEPTION_INT_OVERFLOW:
duke@0	return Handle_IDiv_Exception(exceptionInfo);
duke@0
duke@0	} // switch
duke@0	}
duke@0	#ifndef _WIN64
duke@0	if ((thread->thread_state() == _thread_in_Java) \|\|
duke@0	(thread->thread_state() == _thread_in_native) )
duke@0	{
duke@0	LONG result=Handle_FLT_Exception(exceptionInfo);
duke@0	if (result==EXCEPTION_CONTINUE_EXECUTION) return result;
duke@0	}
duke@0	#endif //_WIN64
duke@0	}
duke@0
duke@0	if (exception_code != EXCEPTION_BREAKPOINT) {
duke@0	#ifndef _WIN64
duke@0	report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	#else
duke@0	// Itanium Windows uses a VectoredExceptionHandler
duke@0	// Which means that C++ programatic exception handlers (try/except)
duke@0	// will get here. Continue the search for the right except block if
duke@0	// the exception code is not a fatal code.
duke@0	switch ( exception_code ) {
duke@0	case EXCEPTION_ACCESS_VIOLATION:
duke@0	case EXCEPTION_STACK_OVERFLOW:
duke@0	case EXCEPTION_ILLEGAL_INSTRUCTION:
duke@0	case EXCEPTION_ILLEGAL_INSTRUCTION_2:
duke@0	case EXCEPTION_INT_OVERFLOW:
duke@0	case EXCEPTION_INT_DIVIDE_BY_ZERO:
duke@0	{ report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
duke@0	exceptionInfo->ContextRecord);
duke@0	}
duke@0	break;
duke@0	default:
duke@0	break;
duke@0	}
duke@0	#endif
duke@0	}
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0
duke@0	#ifndef _WIN64
duke@0	// Special care for fast JNI accessors.
duke@0	// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and
duke@0	// the heap gets shrunk before the field access.
duke@0	// Need to install our own structured exception handler since native code may
duke@0	// install its own.
duke@0	LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
duke@0	DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
duke@0	if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
duke@0	address pc = (address) exceptionInfo->ContextRecord->Eip;
duke@0	address addr = JNI_FastGetField::find_slowcase_pc(pc);
duke@0	if (addr != (address)-1) {
duke@0	return Handle_Exception(exceptionInfo, addr);
duke@0	}
duke@0	}
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0
duke@0	#define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \
duke@0	Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \
duke@0	__try { \
duke@0	return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \
duke@0	} __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \
duke@0	} \
duke@0	return 0; \
duke@0	}
duke@0
duke@0	DEFINE_FAST_GETFIELD(jboolean, bool, Boolean)
duke@0	DEFINE_FAST_GETFIELD(jbyte, byte, Byte)
duke@0	DEFINE_FAST_GETFIELD(jchar, char, Char)
duke@0	DEFINE_FAST_GETFIELD(jshort, short, Short)
duke@0	DEFINE_FAST_GETFIELD(jint, int, Int)
duke@0	DEFINE_FAST_GETFIELD(jlong, long, Long)
duke@0	DEFINE_FAST_GETFIELD(jfloat, float, Float)
duke@0	DEFINE_FAST_GETFIELD(jdouble, double, Double)
duke@0
duke@0	address os::win32::fast_jni_accessor_wrapper(BasicType type) {
duke@0	switch (type) {
duke@0	case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper;
duke@0	case T_BYTE: return (address)jni_fast_GetByteField_wrapper;
duke@0	case T_CHAR: return (address)jni_fast_GetCharField_wrapper;
duke@0	case T_SHORT: return (address)jni_fast_GetShortField_wrapper;
duke@0	case T_INT: return (address)jni_fast_GetIntField_wrapper;
duke@0	case T_LONG: return (address)jni_fast_GetLongField_wrapper;
duke@0	case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper;
duke@0	case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper;
duke@0	default: ShouldNotReachHere();
duke@0	}
duke@0	return (address)-1;
duke@0	}
duke@0	#endif
duke@0
duke@0	// Virtual Memory
duke@0
duke@0	int os::vm_page_size() { return os::win32::vm_page_size(); }
duke@0	int os::vm_allocation_granularity() {
duke@0	return os::win32::vm_allocation_granularity();
duke@0	}
duke@0
duke@0	// Windows large page support is available on Windows 2003. In order to use
duke@0	// large page memory, the administrator must first assign additional privilege
duke@0	// to the user:
duke@0	// + select Control Panel -> Administrative Tools -> Local Security Policy
duke@0	// + select Local Policies -> User Rights Assignment
duke@0	// + double click "Lock pages in memory", add users and/or groups
duke@0	// + reboot
duke@0	// Note the above steps are needed for administrator as well, as administrators
duke@0	// by default do not have the privilege to lock pages in memory.
duke@0	//
duke@0	// Note about Windows 2003: although the API supports committing large page
duke@0	// memory on a page-by-page basis and VirtualAlloc() returns success under this
duke@0	// scenario, I found through experiment it only uses large page if the entire
duke@0	// memory region is reserved and committed in a single VirtualAlloc() call.
duke@0	// This makes Windows large page support more or less like Solaris ISM, in
duke@0	// that the entire heap must be committed upfront. This probably will change
duke@0	// in the future, if so the code below needs to be revisited.
duke@0
duke@0	#ifndef MEM_LARGE_PAGES
duke@0	#define MEM_LARGE_PAGES 0x20000000
duke@0	#endif
duke@0
duke@0	// GetLargePageMinimum is only available on Windows 2003. The other functions
duke@0	// are available on NT but not on Windows 98/Me. We have to resolve them at
duke@0	// runtime.
duke@0	typedef SIZE_T (WINAPI *GetLargePageMinimum_func_type) (void);
duke@0	typedef BOOL (WINAPI *AdjustTokenPrivileges_func_type)
duke@0	(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
duke@0	typedef BOOL (WINAPI *OpenProcessToken_func_type) (HANDLE, DWORD, PHANDLE);
duke@0	typedef BOOL (WINAPI *LookupPrivilegeValue_func_type) (LPCTSTR, LPCTSTR, PLUID);
duke@0
duke@0	static GetLargePageMinimum_func_type _GetLargePageMinimum;
duke@0	static AdjustTokenPrivileges_func_type _AdjustTokenPrivileges;
duke@0	static OpenProcessToken_func_type _OpenProcessToken;
duke@0	static LookupPrivilegeValue_func_type _LookupPrivilegeValue;
duke@0
duke@0	static HINSTANCE _kernel32;
duke@0	static HINSTANCE _advapi32;
duke@0	static HANDLE _hProcess;
duke@0	static HANDLE _hToken;
duke@0
duke@0	static size_t _large_page_size = 0;
duke@0
duke@0	static bool resolve_functions_for_large_page_init() {
duke@0	_kernel32 = LoadLibrary("kernel32.dll");
duke@0	if (_kernel32 == NULL) return false;
duke@0
duke@0	_GetLargePageMinimum = CAST_TO_FN_PTR(GetLargePageMinimum_func_type,
duke@0	GetProcAddress(_kernel32, "GetLargePageMinimum"));
duke@0	if (_GetLargePageMinimum == NULL) return false;
duke@0
duke@0	_advapi32 = LoadLibrary("advapi32.dll");
duke@0	if (_advapi32 == NULL) return false;
duke@0
duke@0	_AdjustTokenPrivileges = CAST_TO_FN_PTR(AdjustTokenPrivileges_func_type,
duke@0	GetProcAddress(_advapi32, "AdjustTokenPrivileges"));
duke@0	_OpenProcessToken = CAST_TO_FN_PTR(OpenProcessToken_func_type,
duke@0	GetProcAddress(_advapi32, "OpenProcessToken"));
duke@0	_LookupPrivilegeValue = CAST_TO_FN_PTR(LookupPrivilegeValue_func_type,
duke@0	GetProcAddress(_advapi32, "LookupPrivilegeValueA"));
duke@0	return _AdjustTokenPrivileges != NULL &&
duke@0	_OpenProcessToken != NULL &&
duke@0	_LookupPrivilegeValue != NULL;
duke@0	}
duke@0
duke@0	static bool request_lock_memory_privilege() {
duke@0	_hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE,
duke@0	os::current_process_id());
duke@0
duke@0	LUID luid;
duke@0	if (_hProcess != NULL &&
duke@0	_OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) &&
duke@0	_LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) {
duke@0
duke@0	TOKEN_PRIVILEGES tp;
duke@0	tp.PrivilegeCount = 1;
duke@0	tp.Privileges[0].Luid = luid;
duke@0	tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
duke@0
duke@0	// AdjustTokenPrivileges() may return TRUE even when it couldn't change the
duke@0	// privilege. Check GetLastError() too. See MSDN document.
duke@0	if (_AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) &&
duke@0	(GetLastError() == ERROR_SUCCESS)) {
duke@0	return true;
duke@0	}
duke@0	}
duke@0
duke@0	return false;
duke@0	}
duke@0
duke@0	static void cleanup_after_large_page_init() {
duke@0	_GetLargePageMinimum = NULL;
duke@0	_AdjustTokenPrivileges = NULL;
duke@0	_OpenProcessToken = NULL;
duke@0	_LookupPrivilegeValue = NULL;
duke@0	if (_kernel32) FreeLibrary(_kernel32);
duke@0	_kernel32 = NULL;
duke@0	if (_advapi32) FreeLibrary(_advapi32);
duke@0	_advapi32 = NULL;
duke@0	if (_hProcess) CloseHandle(_hProcess);
duke@0	_hProcess = NULL;
duke@0	if (_hToken) CloseHandle(_hToken);
duke@0	_hToken = NULL;
duke@0	}
duke@0
duke@0	bool os::large_page_init() {
duke@0	if (!UseLargePages) return false;
duke@0
duke@0	// print a warning if any large page related flag is specified on command line
duke@0	bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) \|\|
duke@0	!FLAG_IS_DEFAULT(LargePageSizeInBytes);
duke@0	bool success = false;
duke@0
duke@0	# define WARN(msg) if (warn_on_failure) { warning(msg); }
duke@0	if (resolve_functions_for_large_page_init()) {
duke@0	if (request_lock_memory_privilege()) {
duke@0	size_t s = _GetLargePageMinimum();
duke@0	if (s) {
duke@0	#if defined(IA32) \|\| defined(AMD64)
duke@0	if (s > 4M \|\| LargePageSizeInBytes > 4M) {
duke@0	WARN("JVM cannot use large pages bigger than 4mb.");
duke@0	} else {
duke@0	#endif
duke@0	if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) {
duke@0	_large_page_size = LargePageSizeInBytes;
duke@0	} else {
duke@0	_large_page_size = s;
duke@0	}
duke@0	success = true;
duke@0	#if defined(IA32) \|\| defined(AMD64)
duke@0	}
duke@0	#endif
duke@0	} else {
duke@0	WARN("Large page is not supported by the processor.");
duke@0	}
duke@0	} else {
duke@0	WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.");
duke@0	}
duke@0	} else {
duke@0	WARN("Large page is not supported by the operating system.");
duke@0	}
duke@0	#undef WARN
duke@0
duke@0	const size_t default_page_size = (size_t) vm_page_size();
duke@0	if (success && _large_page_size > default_page_size) {
duke@0	_page_sizes[0] = _large_page_size;
duke@0	_page_sizes[1] = default_page_size;
duke@0	_page_sizes[2] = 0;
duke@0	}
duke@0
duke@0	cleanup_after_large_page_init();
duke@0	return success;
duke@0	}
duke@0
duke@0	// On win32, one cannot release just a part of reserved memory, it's an
duke@0	// all or nothing deal. When we split a reservation, we must break the
duke@0	// reservation into two reservations.
duke@0	void os::split_reserved_memory(char *base, size_t size, size_t split,
duke@0	bool realloc) {
duke@0	if (size > 0) {
duke@0	release_memory(base, size);
duke@0	if (realloc) {
duke@0	reserve_memory(split, base);
duke@0	}
duke@0	if (size != split) {
duke@0	reserve_memory(size - split, base + split);
duke@0	}
duke@0	}
duke@0	}
duke@0
duke@0	char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) {
duke@0	assert((size_t)addr % os::vm_allocation_granularity() == 0,
duke@0	"reserve alignment");
duke@0	assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
coleenp@783	char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
duke@0	assert(res == NULL \|\| addr == NULL \|\| addr == res,
duke@0	"Unexpected address from reserve.");
duke@0	return res;
duke@0	}
duke@0
duke@0	// Reserve memory at an arbitrary address, only if that area is
duke@0	// available (and not reserved for something else).
duke@0	char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
duke@0	// Windows os::reserve_memory() fails of the requested address range is
duke@0	// not avilable.
duke@0	return reserve_memory(bytes, requested_addr);
duke@0	}
duke@0
duke@0	size_t os::large_page_size() {
duke@0	return _large_page_size;
duke@0	}
duke@0
duke@0	bool os::can_commit_large_page_memory() {
duke@0	// Windows only uses large page memory when the entire region is reserved
duke@0	// and committed in a single VirtualAlloc() call. This may change in the
duke@0	// future, but with Windows 2003 it's not possible to commit on demand.
duke@0	return false;
duke@0	}
duke@0
jcoomes@137	bool os::can_execute_large_page_memory() {
jcoomes@137	return true;
jcoomes@137	}
jcoomes@137
coleenp@783	char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
jmasa@446
coleenp@845	const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
jmasa@446
jmasa@446	if (UseLargePagesIndividualAllocation) {
jmasa@446	if (TracePageSizes && Verbose) {
jmasa@446	tty->print_cr("Reserving large pages individually.");
jmasa@446	}
jmasa@446	char * p_buf;
jmasa@446	// first reserve enough address space in advance since we want to be
jmasa@446	// able to break a single contiguous virtual address range into multiple
jmasa@446	// large page commits but WS2003 does not allow reserving large page space
jmasa@446	// so we just use 4K pages for reserve, this gives us a legal contiguous
jmasa@446	// address space. then we will deallocate that reservation, and re alloc
jmasa@446	// using large pages
jmasa@446	const size_t size_of_reserve = bytes + _large_page_size;
jmasa@446	if (bytes > size_of_reserve) {
jmasa@446	// Overflowed.
jmasa@446	warning("Individually allocated large pages failed, "
jmasa@446	"use -XX:-UseLargePagesIndividualAllocation to turn off");
jmasa@446	return NULL;
jmasa@446	}
kvn@769	p_buf = (char *) VirtualAlloc(addr,
jmasa@446	size_of_reserve, // size of Reserve
jmasa@446	MEM_RESERVE,
coleenp@783	PAGE_READWRITE);
jmasa@446	// If reservation failed, return NULL
jmasa@446	if (p_buf == NULL) return NULL;
jmasa@446
jmasa@446	release_memory(p_buf, bytes + _large_page_size);
jmasa@446	// round up to page boundary. If the size_of_reserve did not
jmasa@446	// overflow and the reservation did not fail, this align up
jmasa@446	// should not overflow.
jmasa@446	p_buf = (char *) align_size_up((size_t)p_buf, _large_page_size);
jmasa@446
jmasa@446	// now go through and allocate one page at a time until all bytes are
jmasa@446	// allocated
jmasa@446	size_t bytes_remaining = align_size_up(bytes, _large_page_size);
jmasa@446	// An overflow of align_size_up() would have been caught above
jmasa@446	// in the calculation of size_of_reserve.
jmasa@446	char * next_alloc_addr = p_buf;
jmasa@446
jmasa@446	#ifdef ASSERT
jmasa@446	// Variable for the failure injection
jmasa@446	long ran_num = os::random();
jmasa@446	size_t fail_after = ran_num % bytes;
jmasa@446	#endif
jmasa@446
jmasa@446	while (bytes_remaining) {
jmasa@446	size_t bytes_to_rq = MIN2(bytes_remaining, _large_page_size);
jmasa@446	// Note allocate and commit
jmasa@446	char * p_new;
jmasa@446
jmasa@446	#ifdef ASSERT
jmasa@446	bool inject_error = LargePagesIndividualAllocationInjectError &&
jmasa@446	(bytes_remaining <= fail_after);
jmasa@446	#else
jmasa@446	const bool inject_error = false;
jmasa@446	#endif
jmasa@446
jmasa@446	if (inject_error) {
jmasa@446	p_new = NULL;
jmasa@446	} else {
jmasa@446	p_new = (char *) VirtualAlloc(next_alloc_addr,
jmasa@446	bytes_to_rq,
jmasa@446	MEM_RESERVE \| MEM_COMMIT \| MEM_LARGE_PAGES,
coleenp@845	prot);
jmasa@446	}
jmasa@446
jmasa@446	if (p_new == NULL) {
jmasa@446	// Free any allocated pages
jmasa@446	if (next_alloc_addr > p_buf) {
jmasa@446	// Some memory was committed so release it.
jmasa@446	size_t bytes_to_release = bytes - bytes_remaining;
jmasa@446	release_memory(p_buf, bytes_to_release);
jmasa@446	}
jmasa@446	#ifdef ASSERT
jmasa@446	if (UseLargePagesIndividualAllocation &&
jmasa@446	LargePagesIndividualAllocationInjectError) {
jmasa@446	if (TracePageSizes && Verbose) {
jmasa@446	tty->print_cr("Reserving large pages individually failed.");
jmasa@446	}
jmasa@446	}
jmasa@446	#endif
jmasa@446	return NULL;
jmasa@446	}
jmasa@446	bytes_remaining -= bytes_to_rq;
jmasa@446	next_alloc_addr += bytes_to_rq;
jmasa@446	}
jmasa@446
jmasa@446	return p_buf;
jmasa@446
jmasa@446	} else {
jmasa@446	// normal policy just allocate it all at once
jmasa@446	DWORD flag = MEM_RESERVE \| MEM_COMMIT \| MEM_LARGE_PAGES;
coleenp@845	char * res = (char *)VirtualAlloc(NULL, bytes, flag, prot);
jmasa@446	return res;
jmasa@446	}
duke@0	}
duke@0
duke@0	bool os::release_memory_special(char* base, size_t bytes) {
duke@0	return release_memory(base, bytes);
duke@0	}
duke@0
duke@0	void os::print_statistics() {
duke@0	}
duke@0
coleenp@783	bool os::commit_memory(char* addr, size_t bytes, bool exec) {
duke@0	if (bytes == 0) {
duke@0	// Don't bother the OS with noops.
duke@0	return true;
duke@0	}
duke@0	assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries");
duke@0	assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
duke@0	// Don't attempt to print anything if the OS call fails. We're
duke@0	// probably low on resources, so the print itself may cause crashes.
coleenp@783	bool result = VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) != 0;
coleenp@783	if (result != NULL && exec) {
coleenp@783	DWORD oldprot;
coleenp@783	// Windows doc says to use VirtualProtect to get execute permissions
coleenp@783	return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot) != 0;
coleenp@783	} else {
coleenp@783	return result;
coleenp@783	}
coleenp@783	}
coleenp@783
coleenp@783	bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
coleenp@783	bool exec) {
coleenp@783	return commit_memory(addr, size, exec);
duke@0	}
duke@0
duke@0	bool os::uncommit_memory(char* addr, size_t bytes) {
duke@0	if (bytes == 0) {
duke@0	// Don't bother the OS with noops.
duke@0	return true;
duke@0	}
duke@0	assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries");
duke@0	assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks");
duke@0	return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0;
duke@0	}
duke@0
duke@0	bool os::release_memory(char* addr, size_t bytes) {
duke@0	return VirtualFree(addr, 0, MEM_RELEASE) != 0;
duke@0	}
duke@0
coleenp@1621	bool os::create_stack_guard_pages(char* addr, size_t size) {
coleenp@1621	return os::commit_memory(addr, size);
coleenp@1621	}
coleenp@1621
coleenp@1621	bool os::remove_stack_guard_pages(char* addr, size_t size) {
coleenp@1621	return os::uncommit_memory(addr, size);
coleenp@1621	}
coleenp@1621
coleenp@295	// Set protections specified
coleenp@295	bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
coleenp@295	bool is_committed) {
coleenp@295	unsigned int p = 0;
coleenp@295	switch (prot) {
coleenp@295	case MEM_PROT_NONE: p = PAGE_NOACCESS; break;
coleenp@295	case MEM_PROT_READ: p = PAGE_READONLY; break;
coleenp@295	case MEM_PROT_RW: p = PAGE_READWRITE; break;
coleenp@295	case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break;
coleenp@295	default:
coleenp@295	ShouldNotReachHere();
coleenp@295	}
coleenp@295
duke@0	DWORD old_status;
coleenp@295
coleenp@295	// Strange enough, but on Win32 one can change protection only for committed
coleenp@295	// memory, not a big deal anyway, as bytes less or equal than 64K
coleenp@783	if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) {
coleenp@295	fatal("cannot commit protection page");
coleenp@295	}
coleenp@295	// One cannot use os::guard_memory() here, as on Win32 guard page
coleenp@295	// have different (one-shot) semantics, from MSDN on PAGE_GUARD:
coleenp@295	//
coleenp@295	// Pages in the region become guard pages. Any attempt to access a guard page
coleenp@295	// causes the system to raise a STATUS_GUARD_PAGE exception and turn off
coleenp@295	// the guard page status. Guard pages thus act as a one-time access alarm.
coleenp@295	return VirtualProtect(addr, bytes, p, &old_status) != 0;
duke@0	}
duke@0
duke@0	bool os::guard_memory(char* addr, size_t bytes) {
duke@0	DWORD old_status;
coleenp@533	return VirtualProtect(addr, bytes, PAGE_READWRITE \| PAGE_GUARD, &old_status) != 0;
duke@0	}
duke@0
duke@0	bool os::unguard_memory(char* addr, size_t bytes) {
duke@0	DWORD old_status;
coleenp@533	return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0;
duke@0	}
duke@0
duke@0	void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
duke@0	void os::free_memory(char *addr, size_t bytes) { }
duke@0	void os::numa_make_global(char *addr, size_t bytes) { }
iveresov@198	void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { }
duke@0	bool os::numa_topology_changed() { return false; }
duke@0	size_t os::numa_get_groups_num() { return 1; }
duke@0	int os::numa_get_group_id() { return 0; }
duke@0	size_t os::numa_get_leaf_groups(int *ids, size_t size) {
duke@0	if (size > 0) {
duke@0	ids[0] = 0;
duke@0	return 1;
duke@0	}
duke@0	return 0;
duke@0	}
duke@0
duke@0	bool os::get_page_info(char start, page_info info) {
duke@0	return false;
duke@0	}
duke@0
duke@0	char os::scan_pages(char start, char* end, page_info* page_expected, page_info* page_found) {
duke@0	return end;
duke@0	}
duke@0
duke@0	char* os::non_memory_address_word() {
duke@0	// Must never look like an address returned by reserve_memory,
duke@0	// even in its subfields (as defined by the CPU immediate fields,
duke@0	// if the CPU splits constants across multiple instructions).
duke@0	return (char*)-1;
duke@0	}
duke@0
duke@0	#define MAX_ERROR_COUNT 100
duke@0	#define SYS_THREAD_ERROR 0xffffffffUL
duke@0
duke@0	void os::pd_start_thread(Thread* thread) {
duke@0	DWORD ret = ResumeThread(thread->osthread()->thread_handle());
duke@0	// Returns previous suspend state:
duke@0	// 0: Thread was not suspended
duke@0	// 1: Thread is running now
duke@0	// >1: Thread is still suspended.
duke@0	assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back
duke@0	}
duke@0
duke@0	size_t os::read(int fd, void *buf, unsigned int nBytes) {
duke@0	return ::read(fd, buf, nBytes);
duke@0	}
duke@0
duke@0	class HighResolutionInterval {
duke@0	// The default timer resolution seems to be 10 milliseconds.
duke@0	// (Where is this written down?)
duke@0	// If someone wants to sleep for only a fraction of the default,
duke@0	// then we set the timer resolution down to 1 millisecond for
duke@0	// the duration of their interval.
duke@0	// We carefully set the resolution back, since otherwise we
duke@0	// seem to incur an overhead (3%?) that we don't need.
duke@0	// CONSIDER: if ms is small, say 3, then we should run with a high resolution time.
duke@0	// Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod().
duke@0	// Alternatively, we could compute the relative error (503/500 = .6%) and only use
duke@0	// timeBeginPeriod() if the relative error exceeded some threshold.
duke@0	// timeBeginPeriod() has been linked to problems with clock drift on win32 systems and
duke@0	// to decreased efficiency related to increased timer "tick" rates. We want to minimize
duke@0	// (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high
duke@0	// resolution timers running.
duke@0	private:
duke@0	jlong resolution;
duke@0	public:
duke@0	HighResolutionInterval(jlong ms) {
duke@0	resolution = ms % 10L;
duke@0	if (resolution != 0) {
duke@0	MMRESULT result = timeBeginPeriod(1L);
duke@0	}
duke@0	}
duke@0	~HighResolutionInterval() {
duke@0	if (resolution != 0) {
duke@0	MMRESULT result = timeEndPeriod(1L);
duke@0	}
duke@0	resolution = 0L;
duke@0	}
duke@0	};
duke@0
duke@0	int os::sleep(Thread* thread, jlong ms, bool interruptable) {
duke@0	jlong limit = (jlong) MAXDWORD;
duke@0
duke@0	while(ms > limit) {
duke@0	int res;
duke@0	if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT)
duke@0	return res;
duke@0	ms -= limit;
duke@0	}
duke@0
duke@0	assert(thread == Thread::current(), "thread consistency check");
duke@0	OSThread* osthread = thread->osthread();
duke@0	OSThreadWaitState osts(osthread, false /* not Object.wait() */);
duke@0	int result;
duke@0	if (interruptable) {
duke@0	assert(thread->is_Java_thread(), "must be java thread");
duke@0	JavaThread jt = (JavaThread ) thread;
duke@0	ThreadBlockInVM tbivm(jt);
duke@0
duke@0	jt->set_suspend_equivalent();
duke@0	// cleared by handle_special_suspend_equivalent_condition() or
duke@0	// java_suspend_self() via check_and_wait_while_suspended()
duke@0
duke@0	HANDLE events[1];
duke@0	events[0] = osthread->interrupt_event();
duke@0	HighResolutionInterval *phri=NULL;
duke@0	if(!ForceTimeHighResolution)
duke@0	phri = new HighResolutionInterval( ms );
duke@0	if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) {
duke@0	result = OS_TIMEOUT;
duke@0	} else {
duke@0	ResetEvent(osthread->interrupt_event());
duke@0	osthread->set_interrupted(false);
duke@0	result = OS_INTRPT;
duke@0	}
duke@0	delete phri; //if it is NULL, harmless
duke@0
duke@0	// were we externally suspended while we were waiting?
duke@0	jt->check_and_wait_while_suspended();
duke@0	} else {
duke@0	assert(!thread->is_Java_thread(), "must not be java thread");
duke@0	Sleep((long) ms);
duke@0	result = OS_TIMEOUT;
duke@0	}
duke@0	return result;
duke@0	}
duke@0
duke@0	// Sleep forever; naked call to OS-specific sleep; use with CAUTION
duke@0	void os::infinite_sleep() {
duke@0	while (true) { // sleep forever ...
duke@0	Sleep(100000); // ... 100 seconds at a time
duke@0	}
duke@0	}
duke@0
duke@0	typedef BOOL (WINAPI * STTSignature)(void) ;
duke@0
duke@0	os::YieldResult os::NakedYield() {
duke@0	// Use either SwitchToThread() or Sleep(0)
duke@0	// Consider passing back the return value from SwitchToThread().
duke@0	// We use GetProcAddress() as ancient Win9X versions of windows doen't support SwitchToThread.
duke@0	// In that case we revert to Sleep(0).
duke@0	static volatile STTSignature stt = (STTSignature) 1 ;
duke@0
duke@0	if (stt == ((STTSignature) 1)) {
duke@0	stt = (STTSignature) ::GetProcAddress (LoadLibrary ("Kernel32.dll"), "SwitchToThread") ;
duke@0	// It's OK if threads race during initialization as the operation above is idempotent.
duke@0	}
duke@0	if (stt != NULL) {
duke@0	return (*stt)() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ;
duke@0	} else {
duke@0	Sleep (0) ;
duke@0	}
duke@0	return os::YIELD_UNKNOWN ;
duke@0	}
duke@0
duke@0	void os::yield() { os::NakedYield(); }
duke@0
duke@0	void os::yield_all(int attempts) {
duke@0	// Yields to all threads, including threads with lower priorities
duke@0	Sleep(1);
duke@0	}
duke@0
duke@0	// Win32 only gives you access to seven real priorities at a time,
duke@0	// so we compress Java's ten down to seven. It would be better
duke@0	// if we dynamically adjusted relative priorities.
duke@0
duke@0	int os::java_to_os_priority[MaxPriority + 1] = {
duke@0	THREAD_PRIORITY_IDLE, // 0 Entry should never be used
duke@0	THREAD_PRIORITY_LOWEST, // 1 MinPriority
duke@0	THREAD_PRIORITY_LOWEST, // 2
duke@0	THREAD_PRIORITY_BELOW_NORMAL, // 3
duke@0	THREAD_PRIORITY_BELOW_NORMAL, // 4
duke@0	THREAD_PRIORITY_NORMAL, // 5 NormPriority
duke@0	THREAD_PRIORITY_NORMAL, // 6
duke@0	THREAD_PRIORITY_ABOVE_NORMAL, // 7
duke@0	THREAD_PRIORITY_ABOVE_NORMAL, // 8
duke@0	THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
duke@0	THREAD_PRIORITY_HIGHEST // 10 MaxPriority
duke@0	};
duke@0
duke@0	int prio_policy1[MaxPriority + 1] = {
duke@0	THREAD_PRIORITY_IDLE, // 0 Entry should never be used
duke@0	THREAD_PRIORITY_LOWEST, // 1 MinPriority
duke@0	THREAD_PRIORITY_LOWEST, // 2
duke@0	THREAD_PRIORITY_BELOW_NORMAL, // 3
duke@0	THREAD_PRIORITY_BELOW_NORMAL, // 4
duke@0	THREAD_PRIORITY_NORMAL, // 5 NormPriority
duke@0	THREAD_PRIORITY_ABOVE_NORMAL, // 6
duke@0	THREAD_PRIORITY_ABOVE_NORMAL, // 7
duke@0	THREAD_PRIORITY_HIGHEST, // 8
duke@0	THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority
duke@0	THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority
duke@0	};
duke@0
duke@0	static int prio_init() {
duke@0	// If ThreadPriorityPolicy is 1, switch tables
duke@0	if (ThreadPriorityPolicy == 1) {
duke@0	int i;
duke@0	for (i = 0; i < MaxPriority + 1; i++) {
duke@0	os::java_to_os_priority[i] = prio_policy1[i];
duke@0	}
duke@0	}
duke@0	return 0;
duke@0	}
duke@0
duke@0	OSReturn os::set_native_priority(Thread* thread, int priority) {
duke@0	if (!UseThreadPriorities) return OS_OK;
duke@0	bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0;
duke@0	return ret ? OS_OK : OS_ERR;
duke@0	}
duke@0
duke@0	OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) {
duke@0	if ( !UseThreadPriorities ) {
duke@0	*priority_ptr = java_to_os_priority[NormPriority];
duke@0	return OS_OK;
duke@0	}
duke@0	int os_prio = GetThreadPriority(thread->osthread()->thread_handle());
duke@0	if (os_prio == THREAD_PRIORITY_ERROR_RETURN) {
duke@0	assert(false, "GetThreadPriority failed");
duke@0	return OS_ERR;
duke@0	}
duke@0	*priority_ptr = os_prio;
duke@0	return OS_OK;
duke@0	}
duke@0
duke@0
duke@0	// Hint to the underlying OS that a task switch would not be good.
duke@0	// Void return because it's a hint and can fail.
duke@0	void os::hint_no_preempt() {}
duke@0
duke@0	void os::interrupt(Thread* thread) {
duke@0	assert(!thread->is_Java_thread() \|\| Thread::current() == thread \|\| Threads_lock->owned_by_self(),
duke@0	"possibility of dangling Thread pointer");
duke@0
duke@0	OSThread* osthread = thread->osthread();
duke@0	osthread->set_interrupted(true);
duke@0	// More than one thread can get here with the same value of osthread,
duke@0	// resulting in multiple notifications. We do, however, want the store
duke@0	// to interrupted() to be visible to other threads before we post
duke@0	// the interrupt event.
duke@0	OrderAccess::release();
duke@0	SetEvent(osthread->interrupt_event());
duke@0	// For JSR166: unpark after setting status
duke@0	if (thread->is_Java_thread())
duke@0	((JavaThread*)thread)->parker()->unpark();
duke@0
duke@0	ParkEvent * ev = thread->_ParkEvent ;
duke@0	if (ev != NULL) ev->unpark() ;
duke@0
duke@0	}
duke@0
duke@0
duke@0	bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
duke@0	assert(!thread->is_Java_thread() \|\| Thread::current() == thread \|\| Threads_lock->owned_by_self(),
duke@0	"possibility of dangling Thread pointer");
duke@0
duke@0	OSThread* osthread = thread->osthread();
duke@0	bool interrupted;
duke@0	interrupted = osthread->interrupted();
duke@0	if (clear_interrupted == true) {
duke@0	osthread->set_interrupted(false);
duke@0	ResetEvent(osthread->interrupt_event());
duke@0	} // Otherwise leave the interrupted state alone
duke@0
duke@0	return interrupted;
duke@0	}
duke@0
duke@0	// Get's a pc (hint) for a running thread. Currently used only for profiling.
duke@0	ExtendedPC os::get_thread_pc(Thread* thread) {
duke@0	CONTEXT context;
duke@0	context.ContextFlags = CONTEXT_CONTROL;
duke@0	HANDLE handle = thread->osthread()->thread_handle();
duke@0	#ifdef _M_IA64
duke@0	assert(0, "Fix get_thread_pc");
duke@0	return ExtendedPC(NULL);
duke@0	#else
duke@0	if (GetThreadContext(handle, &context)) {
duke@0	#ifdef _M_AMD64
duke@0	return ExtendedPC((address) context.Rip);
duke@0	#else
duke@0	return ExtendedPC((address) context.Eip);
duke@0	#endif
duke@0	} else {
duke@0	return ExtendedPC(NULL);
duke@0	}
duke@0	#endif
duke@0	}
duke@0
duke@0	// GetCurrentThreadId() returns DWORD
duke@0	intx os::current_thread_id() { return GetCurrentThreadId(); }
duke@0
duke@0	static int _initial_pid = 0;
duke@0
duke@0	int os::current_process_id()
duke@0	{
duke@0	return (_initial_pid ? _initial_pid : _getpid());
duke@0	}
duke@0
duke@0	int os::win32::_vm_page_size = 0;
duke@0	int os::win32::_vm_allocation_granularity = 0;
duke@0	int os::win32::_processor_type = 0;
duke@0	// Processor level is not available on non-NT systems, use vm_version instead
duke@0	int os::win32::_processor_level = 0;
duke@0	julong os::win32::_physical_memory = 0;
duke@0	size_t os::win32::_default_stack_size = 0;
duke@0
duke@0	intx os::win32::_os_thread_limit = 0;
duke@0	volatile intx os::win32::_os_thread_count = 0;
duke@0
duke@0	bool os::win32::_is_nt = false;
jmasa@446	bool os::win32::_is_windows_2003 = false;
duke@0
duke@0
duke@0	void os::win32::initialize_system_info() {
duke@0	SYSTEM_INFO si;
duke@0	GetSystemInfo(&si);
duke@0	_vm_page_size = si.dwPageSize;
duke@0	_vm_allocation_granularity = si.dwAllocationGranularity;
duke@0	_processor_type = si.dwProcessorType;
duke@0	_processor_level = si.wProcessorLevel;
phh@1352	set_processor_count(si.dwNumberOfProcessors);
duke@0
poonam@1001	MEMORYSTATUSEX ms;
poonam@1001	ms.dwLength = sizeof(ms);
poonam@1001
duke@0	// also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual,
duke@0	// dwMemoryLoad (% of memory in use)
poonam@1001	GlobalMemoryStatusEx(&ms);
poonam@1001	_physical_memory = ms.ullTotalPhys;
duke@0
duke@0	OSVERSIONINFO oi;
duke@0	oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
duke@0	GetVersionEx(&oi);
duke@0	switch(oi.dwPlatformId) {
duke@0	case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break;
jmasa@446	case VER_PLATFORM_WIN32_NT:
jmasa@446	_is_nt = true;
jmasa@446	{
jmasa@446	int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion;
jmasa@446	if (os_vers == 5002) {
jmasa@446	_is_windows_2003 = true;
jmasa@446	}
jmasa@446	}
jmasa@446	break;
duke@0	default: fatal("Unknown platform");
duke@0	}
duke@0
duke@0	_default_stack_size = os::current_stack_size();
duke@0	assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size");
duke@0	assert((_default_stack_size & (_vm_page_size - 1)) == 0,
duke@0	"stack size not a multiple of page size");
duke@0
duke@0	initialize_performance_counter();
duke@0
duke@0	// Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is
duke@0	// known to deadlock the system, if the VM issues to thread operations with
duke@0	// a too high frequency, e.g., such as changing the priorities.
duke@0	// The 6000 seems to work well - no deadlocks has been notices on the test
duke@0	// programs that we have seen experience this problem.
duke@0	if (!os::win32::is_nt()) {
duke@0	StarvationMonitorInterval = 6000;
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	void os::win32::setmode_streams() {
duke@0	_setmode(_fileno(stdin), _O_BINARY);
duke@0	_setmode(_fileno(stdout), _O_BINARY);
duke@0	_setmode(_fileno(stderr), _O_BINARY);
duke@0	}
duke@0
duke@0
duke@0	int os::message_box(const char* title, const char* message) {
duke@0	int result = MessageBox(NULL, message, title,
duke@0	MB_YESNO \| MB_ICONERROR \| MB_SYSTEMMODAL \| MB_DEFAULT_DESKTOP_ONLY);
duke@0	return result == IDYES;
duke@0	}
duke@0
duke@0	int os::allocate_thread_local_storage() {
duke@0	return TlsAlloc();
duke@0	}
duke@0
duke@0
duke@0	void os::free_thread_local_storage(int index) {
duke@0	TlsFree(index);
duke@0	}
duke@0
duke@0
duke@0	void os::thread_local_storage_at_put(int index, void* value) {
duke@0	TlsSetValue(index, value);
duke@0	assert(thread_local_storage_at(index) == value, "Just checking");
duke@0	}
duke@0
duke@0
duke@0	void* os::thread_local_storage_at(int index) {
duke@0	return TlsGetValue(index);
duke@0	}
duke@0
duke@0
duke@0	#ifndef PRODUCT
duke@0	#ifndef _WIN64
duke@0	// Helpers to check whether NX protection is enabled
duke@0	int nx_exception_filter(_EXCEPTION_POINTERS *pex) {
duke@0	if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
duke@0	pex->ExceptionRecord->NumberParameters > 0 &&
duke@0	pex->ExceptionRecord->ExceptionInformation[0] ==
duke@0	EXCEPTION_INFO_EXEC_VIOLATION) {
duke@0	return EXCEPTION_EXECUTE_HANDLER;
duke@0	}
duke@0	return EXCEPTION_CONTINUE_SEARCH;
duke@0	}
duke@0
duke@0	void nx_check_protection() {
duke@0	// If NX is enabled we'll get an exception calling into code on the stack
duke@0	char code[] = { (char)0xC3 }; // ret
duke@0	void code_ptr = (void )code;
duke@0	__try {
duke@0	__asm call code_ptr
duke@0	} __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) {
duke@0	tty->print_raw_cr("NX protection detected.");
duke@0	}
duke@0	}
duke@0	#endif // _WIN64
duke@0	#endif // PRODUCT
duke@0
duke@0	// this is called _before_ the global arguments have been parsed
duke@0	void os::init(void) {
duke@0	_initial_pid = _getpid();
duke@0
duke@0	init_random(1234567);
duke@0
duke@0	win32::initialize_system_info();
duke@0	win32::setmode_streams();
duke@0	init_page_sizes((size_t) win32::vm_page_size());
duke@0
duke@0	// For better scalability on MP systems (must be called after initialize_system_info)
duke@0	#ifndef PRODUCT
duke@0	if (is_MP()) {
duke@0	NoYieldsInMicrolock = true;
duke@0	}
duke@0	#endif
jmasa@446	// This may be overridden later when argument processing is done.
jmasa@446	FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation,
jmasa@446	os::win32::is_windows_2003());
jmasa@446
duke@0	// Initialize main_process and main_thread
duke@0	main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle
jmasa@446	if (!DuplicateHandle(main_process, GetCurrentThread(), main_process,
duke@0	&main_thread, THREAD_ALL_ACCESS, false, 0)) {
duke@0	fatal("DuplicateHandle failed\n");
duke@0	}
duke@0	main_thread_id = (int) GetCurrentThreadId();
duke@0	}
duke@0
duke@0	// To install functions for atexit processing
duke@0	extern "C" {
duke@0	static void perfMemory_exit_helper() {
duke@0	perfMemory_exit();
duke@0	}
duke@0	}
duke@0
duke@0
duke@0	// this is called _after_ the global arguments have been parsed
duke@0	jint os::init_2(void) {
duke@0	// Allocate a single page and mark it as readable for safepoint polling
duke@0	address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY);
duke@0	guarantee( polling_page != NULL, "Reserve Failed for polling page");
duke@0
duke@0	address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY);
duke@0	guarantee( return_page != NULL, "Commit Failed for polling page");
duke@0
duke@0	os::set_polling_page( polling_page );
duke@0
duke@0	#ifndef PRODUCT
duke@0	if( Verbose && PrintMiscellaneous )
duke@0	tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
duke@0	#endif
duke@0
duke@0	if (!UseMembar) {
coleenp@783	address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
duke@0	guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
duke@0
coleenp@783	return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
duke@0	guarantee( return_page != NULL, "Commit Failed for memory serialize page");
duke@0
duke@0	os::set_memory_serialize_page( mem_serialize_page );
duke@0
duke@0	#ifndef PRODUCT
duke@0	if(Verbose && PrintMiscellaneous)
duke@0	tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
duke@0	#endif
duke@0	}
duke@0
duke@0	FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
duke@0
duke@0	// Setup Windows Exceptions
duke@0
duke@0	// On Itanium systems, Structured Exception Handling does not
duke@0	// work since stack frames must be walkable by the OS. Since
duke@0	// much of our code is dynamically generated, and we do not have
duke@0	// proper unwind .xdata sections, the system simply exits
duke@0	// rather than delivering the exception. To work around
duke@0	// this we use VectorExceptions instead.
duke@0	#ifdef _WIN64
duke@0	if (UseVectoredExceptions) {
duke@0	topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter);
duke@0	}
duke@0	#endif
duke@0
duke@0	// for debugging float code generation bugs
duke@0	if (ForceFloatExceptions) {
duke@0	#ifndef _WIN64
duke@0	static long fp_control_word = 0;
duke@0	__asm { fstcw fp_control_word }
duke@0	// see Intel PPro Manual, Vol. 2, p 7-16
duke@0	const long precision = 0x20;
duke@0	const long underflow = 0x10;
duke@0	const long overflow = 0x08;
duke@0	const long zero_div = 0x04;
duke@0	const long denorm = 0x02;
duke@0	const long invalid = 0x01;
duke@0	fp_control_word \|= invalid;
duke@0	__asm { fldcw fp_control_word }
duke@0	#endif
duke@0	}
duke@0
duke@0	// Initialize HPI.
duke@0	jint hpi_result = hpi::initialize();
duke@0	if (hpi_result != JNI_OK) { return hpi_result; }
duke@0
duke@0	// If stack_commit_size is 0, windows will reserve the default size,
duke@0	// but only commit a small portion of it.
duke@0	size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size());
duke@0	size_t default_reserve_size = os::win32::default_stack_size();
duke@0	size_t actual_reserve_size = stack_commit_size;
duke@0	if (stack_commit_size < default_reserve_size) {
duke@0	// If stack_commit_size == 0, we want this too
duke@0	actual_reserve_size = default_reserve_size;
duke@0	}
duke@0
duke@0	JavaThread::set_stack_size_at_create(stack_commit_size);
duke@0
duke@0	// Calculate theoretical max. size of Threads to guard gainst artifical
duke@0	// out-of-memory situations, where all available address-space has been
duke@0	// reserved by thread stacks.
duke@0	assert(actual_reserve_size != 0, "Must have a stack");
duke@0
duke@0	// Calculate the thread limit when we should start doing Virtual Memory
duke@0	// banging. Currently when the threads will have used all but 200Mb of space.
duke@0	//
duke@0	// TODO: consider performing a similar calculation for commit size instead
duke@0	// as reserve size, since on a 64-bit platform we'll run into that more
duke@0	// often than running out of virtual memory space. We can use the
duke@0	// lower value of the two calculations as the os_thread_limit.
coleenp@170	size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K);
duke@0	win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size);
duke@0
duke@0	// at exit methods are called in the reverse order of their registration.
duke@0	// there is no limit to the number of functions registered. atexit does
duke@0	// not set errno.
duke@0
duke@0	if (PerfAllowAtExitRegistration) {
duke@0	// only register atexit functions if PerfAllowAtExitRegistration is set.
duke@0	// atexit functions can be delayed until process exit time, which
duke@0	// can be problematic for embedded VM situations. Embedded VMs should
duke@0	// call DestroyJavaVM() to assure that VM resources are released.
duke@0
duke@0	// note: perfMemory_exit_helper atexit function may be removed in
duke@0	// the future if the appropriate cleanup code can be added to the
duke@0	// VM_Exit VMOperation's doit method.
duke@0	if (atexit(perfMemory_exit_helper) != 0) {
duke@0	warning("os::init_2 atexit(perfMemory_exit_helper) failed");
duke@0	}
duke@0	}
duke@0
duke@0	// initialize PSAPI or ToolHelp for fatal error handler
duke@0	if (win32::is_nt()) _init_psapi();
duke@0	else _init_toolhelp();
duke@0
duke@0	#ifndef _WIN64
duke@0	// Print something if NX is enabled (win32 on AMD64)
duke@0	NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection());
duke@0	#endif
duke@0
duke@0	// initialize thread priority policy
duke@0	prio_init();
duke@0
iveresov@520	if (UseNUMA && !ForceNUMA) {
iveresov@520	UseNUMA = false; // Currently unsupported.
iveresov@520	}
iveresov@520
duke@0	return JNI_OK;
duke@0	}
duke@0
bobv@1892	void os::init_3(void) {
bobv@1892	return;
bobv@1892	}
duke@0
duke@0	// Mark the polling page as unreadable
duke@0	void os::make_polling_page_unreadable(void) {
duke@0	DWORD old_status;
duke@0	if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) )
duke@0	fatal("Could not disable polling page");
duke@0	};
duke@0
duke@0	// Mark the polling page as readable
duke@0	void os::make_polling_page_readable(void) {
duke@0	DWORD old_status;
duke@0	if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) )
duke@0	fatal("Could not enable polling page");
duke@0	};
duke@0
duke@0
duke@0	int os::stat(const char path, struct stat sbuf) {
duke@0	char pathbuf[MAX_PATH];
duke@0	if (strlen(path) > MAX_PATH - 1) {
duke@0	errno = ENAMETOOLONG;
duke@0	return -1;
duke@0	}
duke@0	hpi::native_path(strcpy(pathbuf, path));
duke@0	int ret = ::stat(pathbuf, sbuf);
duke@0	if (sbuf != NULL && UseUTCFileTimestamp) {
duke@0	// Fix for 6539723. st_mtime returned from stat() is dependent on
duke@0	// the system timezone and so can return different values for the
duke@0	// same file if/when daylight savings time changes. This adjustment
duke@0	// makes sure the same timestamp is returned regardless of the TZ.
duke@0	//
duke@0	// See:
duke@0	// http://msdn.microsoft.com/library/
duke@0	// default.asp?url=/library/en-us/sysinfo/base/
duke@0	// time_zone_information_str.asp
duke@0	// and
duke@0	// http://msdn.microsoft.com/library/default.asp?url=
duke@0	// /library/en-us/sysinfo/base/settimezoneinformation.asp
duke@0	//
duke@0	// NOTE: there is a insidious bug here: If the timezone is changed
duke@0	// after the call to stat() but before 'GetTimeZoneInformation()', then
duke@0	// the adjustment we do here will be wrong and we'll return the wrong
duke@0	// value (which will likely end up creating an invalid class data
duke@0	// archive). Absent a better API for this, or some time zone locking
duke@0	// mechanism, we'll have to live with this risk.
duke@0	TIME_ZONE_INFORMATION tz;
duke@0	DWORD tzid = GetTimeZoneInformation(&tz);
duke@0	int daylightBias =
duke@0	(tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias;
duke@0	sbuf->st_mtime += (tz.Bias + daylightBias) * 60;
duke@0	}
duke@0	return ret;
duke@0	}
duke@0
duke@0
duke@0	#define FT2INT64(ft) \
duke@0	((jlong)((jlong)(ft).dwHighDateTime << 32 \| (julong)(ft).dwLowDateTime))
duke@0
duke@0
duke@0	// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
duke@0	// are used by JVM M&M and JVMTI to get user+sys or user CPU time
duke@0	// of a thread.
duke@0	//
duke@0	// current_thread_cpu_time() and thread_cpu_time(Thread*) returns
duke@0	// the fast estimate available on the platform.
duke@0
duke@0	// current_thread_cpu_time() is not optimized for Windows yet
duke@0	jlong os::current_thread_cpu_time() {
duke@0	// return user + sys since the cost is the same
duke@0	return os::thread_cpu_time(Thread::current(), true /* user+sys */);
duke@0	}
duke@0
duke@0	jlong os::thread_cpu_time(Thread* thread) {
duke@0	// consistent with what current_thread_cpu_time() returns.
duke@0	return os::thread_cpu_time(thread, true /* user+sys */);
duke@0	}
duke@0
duke@0	jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
duke@0	return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
duke@0	}
duke@0
duke@0	jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) {
duke@0	// This code is copy from clasic VM -> hpi::sysThreadCPUTime
duke@0	// If this function changes, os::is_thread_cpu_time_supported() should too
duke@0	if (os::win32::is_nt()) {
duke@0	FILETIME CreationTime;
duke@0	FILETIME ExitTime;
duke@0	FILETIME KernelTime;
duke@0	FILETIME UserTime;
duke@0
duke@0	if ( GetThreadTimes(thread->osthread()->thread_handle(),
duke@0	&CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
duke@0	return -1;
duke@0	else
duke@0	if (user_sys_cpu_time) {
duke@0	return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100;
duke@0	} else {
duke@0	return FT2INT64(UserTime) * 100;
duke@0	}
duke@0	} else {
duke@0	return (jlong) timeGetTime() * 1000000;
duke@0	}
duke@0	}
duke@0
duke@0	void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
duke@0	info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
duke@0	info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
duke@0	info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
duke@0	info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
duke@0	}
duke@0
duke@0	void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
duke@0	info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits
duke@0	info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time
duke@0	info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time
duke@0	info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned
duke@0	}
duke@0
duke@0	bool os::is_thread_cpu_time_supported() {
duke@0	// see os::thread_cpu_time
duke@0	if (os::win32::is_nt()) {
duke@0	FILETIME CreationTime;
duke@0	FILETIME ExitTime;
duke@0	FILETIME KernelTime;
duke@0	FILETIME UserTime;
duke@0
duke@0	if ( GetThreadTimes(GetCurrentThread(),
duke@0	&CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
duke@0	return false;
duke@0	else
duke@0	return true;
duke@0	} else {
duke@0	return false;
duke@0	}
duke@0	}
duke@0
duke@0	// Windows does't provide a loadavg primitive so this is stubbed out for now.
duke@0	// It does have primitives (PDH API) to get CPU usage and run queue length.
duke@0	// "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length"
duke@0	// If we wanted to implement loadavg on Windows, we have a few options:
duke@0	//
duke@0	// a) Query CPU usage and run queue length and "fake" an answer by
duke@0	// returning the CPU usage if it's under 100%, and the run queue
duke@0	// length otherwise. It turns out that querying is pretty slow
duke@0	// on Windows, on the order of 200 microseconds on a fast machine.
duke@0	// Note that on the Windows the CPU usage value is the % usage
duke@0	// since the last time the API was called (and the first call
duke@0	// returns 100%), so we'd have to deal with that as well.
duke@0	//
duke@0	// b) Sample the "fake" answer using a sampling thread and store
duke@0	// the answer in a global variable. The call to loadavg would
duke@0	// just return the value of the global, avoiding the slow query.
duke@0	//
duke@0	// c) Sample a better answer using exponential decay to smooth the
duke@0	// value. This is basically the algorithm used by UNIX kernels.
duke@0	//
duke@0	// Note that sampling thread starvation could affect both (b) and (c).
duke@0	int os::loadavg(double loadavg[], int nelem) {
duke@0	return -1;
duke@0	}
duke@0
duke@0
duke@0	// DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield()
duke@0	bool os::dont_yield() {
duke@0	return DontYieldALot;
duke@0	}
duke@0
duke@0	// Is a (classpath) directory empty?
duke@0	bool os::dir_is_empty(const char* path) {
duke@0	WIN32_FIND_DATA fd;
duke@0	HANDLE f = FindFirstFile(path, &fd);
duke@0	if (f == INVALID_HANDLE_VALUE) {
duke@0	return true;
duke@0	}
duke@0	FindClose(f);
duke@0	return false;
duke@0	}
duke@0
duke@0	// create binary file, rewriting existing file if required
duke@0	int os::create_binary_file(const char* path, bool rewrite_existing) {
duke@0	int oflags = _O_CREAT \| _O_WRONLY \| _O_BINARY;
duke@0	if (!rewrite_existing) {
duke@0	oflags \|= _O_EXCL;
duke@0	}
duke@0	return ::open(path, oflags, _S_IREAD \| _S_IWRITE);
duke@0	}
duke@0
duke@0	// return current position of file pointer
duke@0	jlong os::current_file_offset(int fd) {
duke@0	return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR);
duke@0	}
duke@0
duke@0	// move file pointer to the specified offset
duke@0	jlong os::seek_to_file_offset(int fd, jlong offset) {
duke@0	return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET);
duke@0	}
duke@0
duke@0
duke@0	// Map a block of memory.
duke@0	char* os::map_memory(int fd, const char* file_name, size_t file_offset,
duke@0	char *addr, size_t bytes, bool read_only,
duke@0	bool allow_exec) {
duke@0	HANDLE hFile;
duke@0	char* base;
duke@0
duke@0	hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
duke@0	OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
duke@0	if (hFile == NULL) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("CreateFile() failed: GetLastError->%ld.");
duke@0	}
duke@0	return NULL;
duke@0	}
duke@0
duke@0	if (allow_exec) {
duke@0	// CreateFileMapping/MapViewOfFileEx can't map executable memory
duke@0	// unless it comes from a PE image (which the shared archive is not.)
duke@0	// Even VirtualProtect refuses to give execute access to mapped memory
duke@0	// that was not previously executable.
duke@0	//
duke@0	// Instead, stick the executable region in anonymous memory. Yuck.
duke@0	// Penalty is that ~4 pages will not be shareable - in the future
duke@0	// we might consider DLLizing the shared archive with a proper PE
duke@0	// header so that mapping executable + sharing is possible.
duke@0
duke@0	base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT \| MEM_RESERVE,
duke@0	PAGE_READWRITE);
duke@0	if (base == NULL) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err);
duke@0	}
duke@0	CloseHandle(hFile);
duke@0	return NULL;
duke@0	}
duke@0
duke@0	DWORD bytes_read;
duke@0	OVERLAPPED overlapped;
duke@0	overlapped.Offset = (DWORD)file_offset;
duke@0	overlapped.OffsetHigh = 0;
duke@0	overlapped.hEvent = NULL;
duke@0	// ReadFile guarantees that if the return value is true, the requested
duke@0	// number of bytes were read before returning.
duke@0	bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0;
duke@0	if (!res) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("ReadFile() failed: GetLastError->%ld.", err);
duke@0	}
duke@0	release_memory(base, bytes);
duke@0	CloseHandle(hFile);
duke@0	return NULL;
duke@0	}
duke@0	} else {
duke@0	HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0,
duke@0	NULL /file_name/);
duke@0	if (hMap == NULL) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.");
duke@0	}
duke@0	CloseHandle(hFile);
duke@0	return NULL;
duke@0	}
duke@0
duke@0	DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY;
duke@0	base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset,
duke@0	(DWORD)bytes, addr);
duke@0	if (base == NULL) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err);
duke@0	}
duke@0	CloseHandle(hMap);
duke@0	CloseHandle(hFile);
duke@0	return NULL;
duke@0	}
duke@0
duke@0	if (CloseHandle(hMap) == 0) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err);
duke@0	}
duke@0	CloseHandle(hFile);
duke@0	return base;
duke@0	}
duke@0	}
duke@0
duke@0	if (allow_exec) {
duke@0	DWORD old_protect;
duke@0	DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE;
duke@0	bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0;
duke@0
duke@0	if (!res) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err);
duke@0	}
duke@0	// Don't consider this a hard error, on IA32 even if the
duke@0	// VirtualProtect fails, we should still be able to execute
duke@0	CloseHandle(hFile);
duke@0	return base;
duke@0	}
duke@0	}
duke@0
duke@0	if (CloseHandle(hFile) == 0) {
duke@0	if (PrintMiscellaneous && Verbose) {
duke@0	DWORD err = GetLastError();
duke@0	tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err);
duke@0	}
duke@0	return base;
duke@0	}
duke@0
duke@0	return base;
duke@0	}
duke@0
duke@0
duke@0	// Remap a block of memory.
duke@0	char* os::remap_memory(int fd, const char* file_name, size_t file_offset,
duke@0	char *addr, size_t bytes, bool read_only,
duke@0	bool allow_exec) {
duke@0	// This OS does not allow existing memory maps to be remapped so we
duke@0	// have to unmap the memory before we remap it.
duke@0	if (!os::unmap_memory(addr, bytes)) {
duke@0	return NULL;
duke@0	}
duke@0

author	coleenp
	Wed Jan 12 13:59:18 2011 -0800 (2 years ago)
changeset 1999	2c8e1acf0433
parent 1958	b69c41ea1764
child 2412	a541ca8fa0e3
permissions	-rw-r--r--