aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: // Must be at least Windows 2000 or XP to use IsDebuggerPresent
aoqi@0: #define _WIN32_WINNT 0x500
aoqi@0: 
aoqi@0: // no precompiled headers
aoqi@0: #include "classfile/classLoader.hpp"
aoqi@0: #include "classfile/systemDictionary.hpp"
aoqi@0: #include "classfile/vmSymbols.hpp"
aoqi@0: #include "code/icBuffer.hpp"
aoqi@0: #include "code/vtableStubs.hpp"
aoqi@0: #include "compiler/compileBroker.hpp"
aoqi@0: #include "compiler/disassembler.hpp"
aoqi@0: #include "interpreter/interpreter.hpp"
aoqi@0: #include "jvm_windows.h"
aoqi@0: #include "memory/allocation.inline.hpp"
aoqi@0: #include "memory/filemap.hpp"
aoqi@0: #include "mutex_windows.inline.hpp"
aoqi@0: #include "oops/oop.inline.hpp"
aoqi@0: #include "os_share_windows.hpp"
aoqi@0: #include "prims/jniFastGetField.hpp"
aoqi@0: #include "prims/jvm.h"
aoqi@0: #include "prims/jvm_misc.hpp"
aoqi@0: #include "runtime/arguments.hpp"
aoqi@0: #include "runtime/extendedPC.hpp"
aoqi@0: #include "runtime/globals.hpp"
aoqi@0: #include "runtime/interfaceSupport.hpp"
aoqi@0: #include "runtime/java.hpp"
aoqi@0: #include "runtime/javaCalls.hpp"
aoqi@0: #include "runtime/mutexLocker.hpp"
aoqi@0: #include "runtime/objectMonitor.hpp"
aoqi@0: #include "runtime/osThread.hpp"
aoqi@0: #include "runtime/perfMemory.hpp"
aoqi@0: #include "runtime/sharedRuntime.hpp"
aoqi@0: #include "runtime/statSampler.hpp"
aoqi@0: #include "runtime/stubRoutines.hpp"
aoqi@0: #include "runtime/thread.inline.hpp"
aoqi@0: #include "runtime/threadCritical.hpp"
aoqi@0: #include "runtime/timer.hpp"
aoqi@0: #include "services/attachListener.hpp"
aoqi@0: #include "services/memTracker.hpp"
aoqi@0: #include "services/runtimeService.hpp"
aoqi@0: #include "utilities/decoder.hpp"
aoqi@0: #include "utilities/defaultStream.hpp"
aoqi@0: #include "utilities/events.hpp"
aoqi@0: #include "utilities/growableArray.hpp"
aoqi@0: #include "utilities/vmError.hpp"
aoqi@0: 
aoqi@0: #ifdef _DEBUG
aoqi@0: #include <crtdbg.h>
aoqi@0: #endif
aoqi@0: 
aoqi@0: 
aoqi@0: #include <windows.h>
aoqi@0: #include <sys/types.h>
aoqi@0: #include <sys/stat.h>
aoqi@0: #include <sys/timeb.h>
aoqi@0: #include <objidl.h>
aoqi@0: #include <shlobj.h>
aoqi@0: 
aoqi@0: #include <malloc.h>
aoqi@0: #include <signal.h>
aoqi@0: #include <direct.h>
aoqi@0: #include <errno.h>
aoqi@0: #include <fcntl.h>
aoqi@0: #include <io.h>
aoqi@0: #include <process.h>              // For _beginthreadex(), _endthreadex()
aoqi@0: #include <imagehlp.h>             // For os::dll_address_to_function_name
aoqi@0: /* for enumerating dll libraries */
aoqi@0: #include <vdmdbg.h>
aoqi@0: 
aoqi@0: // for timer info max values which include all bits
aoqi@0: #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF)
aoqi@0: 
aoqi@0: // For DLL loading/load error detection
aoqi@0: // Values of PE COFF
aoqi@0: #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c
aoqi@0: #define IMAGE_FILE_SIGNATURE_LENGTH 4
aoqi@0: 
aoqi@0: static HANDLE main_process;
aoqi@0: static HANDLE main_thread;
aoqi@0: static int    main_thread_id;
aoqi@0: 
aoqi@0: static FILETIME process_creation_time;
aoqi@0: static FILETIME process_exit_time;
aoqi@0: static FILETIME process_user_time;
aoqi@0: static FILETIME process_kernel_time;
aoqi@0: 
aoqi@0: #ifdef _M_IA64
aoqi@0: #define __CPU__ ia64
aoqi@0: #elif _M_AMD64
aoqi@0: #define __CPU__ amd64
aoqi@0: #else
aoqi@0: #define __CPU__ i486
aoqi@0: #endif
aoqi@0: 
aoqi@0: // save DLL module handle, used by GetModuleFileName
aoqi@0: 
aoqi@0: HINSTANCE vm_lib_handle;
aoqi@0: 
aoqi@0: BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) {
aoqi@0:   switch (reason) {
aoqi@0:     case DLL_PROCESS_ATTACH:
aoqi@0:       vm_lib_handle = hinst;
aoqi@0:       if(ForceTimeHighResolution)
aoqi@0:         timeBeginPeriod(1L);
aoqi@0:       break;
aoqi@0:     case DLL_PROCESS_DETACH:
aoqi@0:       if(ForceTimeHighResolution)
aoqi@0:         timeEndPeriod(1L);
aoqi@0:       break;
aoqi@0:     default:
aoqi@0:       break;
aoqi@0:   }
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: static inline double fileTimeAsDouble(FILETIME* time) {
aoqi@0:   const double high  = (double) ((unsigned int) ~0);
aoqi@0:   const double split = 10000000.0;
aoqi@0:   double result = (time->dwLowDateTime / split) +
aoqi@0:                    time->dwHighDateTime * (high/split);
aoqi@0:   return result;
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of os
aoqi@0: 
aoqi@0: bool os::getenv(const char* name, char* buffer, int len) {
aoqi@0:  int result = GetEnvironmentVariable(name, buffer, len);
aoqi@0:  return result > 0 && result < len;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // No setuid programs under Windows.
aoqi@0: bool os::have_special_privileges() {
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // This method is  a periodic task to check for misbehaving JNI applications
aoqi@0: // under CheckJNI, we can add any periodic checks here.
aoqi@0: // For Windows at the moment does nothing
aoqi@0: void os::run_periodic_checks() {
aoqi@0:   return;
aoqi@0: }
aoqi@0: 
aoqi@0: #ifndef _WIN64
aoqi@0: // previous UnhandledExceptionFilter, if there is one
aoqi@0: static LPTOP_LEVEL_EXCEPTION_FILTER prev_uef_handler = NULL;
aoqi@0: 
aoqi@0: LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo);
aoqi@0: #endif
aoqi@0: void os::init_system_properties_values() {
aoqi@0:   /* sysclasspath, java_home, dll_dir */
aoqi@0:   {
aoqi@0:       char *home_path;
aoqi@0:       char *dll_path;
aoqi@0:       char *pslash;
aoqi@0:       char *bin = "\\bin";
aoqi@0:       char home_dir[MAX_PATH];
aoqi@0: 
aoqi@0:       if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) {
aoqi@0:           os::jvm_path(home_dir, sizeof(home_dir));
aoqi@0:           // Found the full path to jvm.dll.
aoqi@0:           // Now cut the path to <java_home>/jre if we can.
aoqi@0:           *(strrchr(home_dir, '\\')) = '\0';  /* get rid of \jvm.dll */
aoqi@0:           pslash = strrchr(home_dir, '\\');
aoqi@0:           if (pslash != NULL) {
aoqi@0:               *pslash = '\0';                 /* get rid of \{client|server} */
aoqi@0:               pslash = strrchr(home_dir, '\\');
aoqi@0:               if (pslash != NULL)
aoqi@0:                   *pslash = '\0';             /* get rid of \bin */
aoqi@0:           }
aoqi@0:       }
aoqi@0: 
aoqi@0:       home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1, mtInternal);
aoqi@0:       if (home_path == NULL)
aoqi@0:           return;
aoqi@0:       strcpy(home_path, home_dir);
aoqi@0:       Arguments::set_java_home(home_path);
aoqi@0: 
aoqi@0:       dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1, mtInternal);
aoqi@0:       if (dll_path == NULL)
aoqi@0:           return;
aoqi@0:       strcpy(dll_path, home_dir);
aoqi@0:       strcat(dll_path, bin);
aoqi@0:       Arguments::set_dll_dir(dll_path);
aoqi@0: 
aoqi@0:       if (!set_boot_path('\\', ';'))
aoqi@0:           return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   /* library_path */
aoqi@0:   #define EXT_DIR "\\lib\\ext"
aoqi@0:   #define BIN_DIR "\\bin"
aoqi@0:   #define PACKAGE_DIR "\\Sun\\Java"
aoqi@0:   {
aoqi@0:     /* Win32 library search order (See the documentation for LoadLibrary):
aoqi@0:      *
aoqi@0:      * 1. The directory from which application is loaded.
aoqi@0:      * 2. The system wide Java Extensions directory (Java only)
aoqi@0:      * 3. System directory (GetSystemDirectory)
aoqi@0:      * 4. Windows directory (GetWindowsDirectory)
aoqi@0:      * 5. The PATH environment variable
aoqi@0:      * 6. The current directory
aoqi@0:      */
aoqi@0: 
aoqi@0:     char *library_path;
aoqi@0:     char tmp[MAX_PATH];
aoqi@0:     char *path_str = ::getenv("PATH");
aoqi@0: 
aoqi@0:     library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) +
aoqi@0:         sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10, mtInternal);
aoqi@0: 
aoqi@0:     library_path[0] = '\0';
aoqi@0: 
aoqi@0:     GetModuleFileName(NULL, tmp, sizeof(tmp));
aoqi@0:     *(strrchr(tmp, '\\')) = '\0';
aoqi@0:     strcat(library_path, tmp);
aoqi@0: 
aoqi@0:     GetWindowsDirectory(tmp, sizeof(tmp));
aoqi@0:     strcat(library_path, ";");
aoqi@0:     strcat(library_path, tmp);
aoqi@0:     strcat(library_path, PACKAGE_DIR BIN_DIR);
aoqi@0: 
aoqi@0:     GetSystemDirectory(tmp, sizeof(tmp));
aoqi@0:     strcat(library_path, ";");
aoqi@0:     strcat(library_path, tmp);
aoqi@0: 
aoqi@0:     GetWindowsDirectory(tmp, sizeof(tmp));
aoqi@0:     strcat(library_path, ";");
aoqi@0:     strcat(library_path, tmp);
aoqi@0: 
aoqi@0:     if (path_str) {
aoqi@0:         strcat(library_path, ";");
aoqi@0:         strcat(library_path, path_str);
aoqi@0:     }
aoqi@0: 
aoqi@0:     strcat(library_path, ";.");
aoqi@0: 
aoqi@0:     Arguments::set_library_path(library_path);
aoqi@0:     FREE_C_HEAP_ARRAY(char, library_path, mtInternal);
aoqi@0:   }
aoqi@0: 
aoqi@0:   /* Default extensions directory */
aoqi@0:   {
aoqi@0:     char path[MAX_PATH];
aoqi@0:     char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1];
aoqi@0:     GetWindowsDirectory(path, MAX_PATH);
aoqi@0:     sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR,
aoqi@0:         path, PACKAGE_DIR, EXT_DIR);
aoqi@0:     Arguments::set_ext_dirs(buf);
aoqi@0:   }
aoqi@0:   #undef EXT_DIR
aoqi@0:   #undef BIN_DIR
aoqi@0:   #undef PACKAGE_DIR
aoqi@0: 
aoqi@0:   /* Default endorsed standards directory. */
aoqi@0:   {
aoqi@0:     #define ENDORSED_DIR "\\lib\\endorsed"
aoqi@0:     size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR);
aoqi@0:     char * buf = NEW_C_HEAP_ARRAY(char, len, mtInternal);
aoqi@0:     sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR);
aoqi@0:     Arguments::set_endorsed_dirs(buf);
aoqi@0:     #undef ENDORSED_DIR
aoqi@0:   }
aoqi@0: 
aoqi@0: #ifndef _WIN64
aoqi@0:   // set our UnhandledExceptionFilter and save any previous one
aoqi@0:   prev_uef_handler = SetUnhandledExceptionFilter(Handle_FLT_Exception);
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // Done
aoqi@0:   return;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::breakpoint() {
aoqi@0:   DebugBreak();
aoqi@0: }
aoqi@0: 
aoqi@0: // Invoked from the BREAKPOINT Macro
aoqi@0: extern "C" void breakpoint() {
aoqi@0:   os::breakpoint();
aoqi@0: }
aoqi@0: 
aoqi@0: /*
aoqi@0:  * RtlCaptureStackBackTrace Windows API may not exist prior to Windows XP.
aoqi@0:  * So far, this method is only used by Native Memory Tracking, which is
aoqi@0:  * only supported on Windows XP or later.
aoqi@0:  */
aoqi@0: address os::get_caller_pc(int n) {
aoqi@0: #ifdef _NMT_NOINLINE_
aoqi@0:   n ++;
aoqi@0: #endif
aoqi@0:   address pc;
aoqi@0:   if (os::Kernel32Dll::RtlCaptureStackBackTrace(n + 1, 1, (PVOID*)&pc, NULL) == 1) {
aoqi@0:     return pc;
aoqi@0:   }
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // os::current_stack_base()
aoqi@0: //
aoqi@0: //   Returns the base of the stack, which is the stack's
aoqi@0: //   starting address.  This function must be called
aoqi@0: //   while running on the stack of the thread being queried.
aoqi@0: 
aoqi@0: address os::current_stack_base() {
aoqi@0:   MEMORY_BASIC_INFORMATION minfo;
aoqi@0:   address stack_bottom;
aoqi@0:   size_t stack_size;
aoqi@0: 
aoqi@0:   VirtualQuery(&minfo, &minfo, sizeof(minfo));
aoqi@0:   stack_bottom =  (address)minfo.AllocationBase;
aoqi@0:   stack_size = minfo.RegionSize;
aoqi@0: 
aoqi@0:   // Add up the sizes of all the regions with the same
aoqi@0:   // AllocationBase.
aoqi@0:   while( 1 )
aoqi@0:   {
aoqi@0:     VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo));
aoqi@0:     if ( stack_bottom == (address)minfo.AllocationBase )
aoqi@0:       stack_size += minfo.RegionSize;
aoqi@0:     else
aoqi@0:       break;
aoqi@0:   }
aoqi@0: 
aoqi@0: #ifdef _M_IA64
aoqi@0:   // IA64 has memory and register stacks
aoqi@0:   //
aoqi@0:   // This is the stack layout you get on NT/IA64 if you specify 1MB stack limit
aoqi@0:   // at thread creation (1MB backing store growing upwards, 1MB memory stack
aoqi@0:   // growing downwards, 2MB summed up)
aoqi@0:   //
aoqi@0:   // ...
aoqi@0:   // ------- top of stack (high address) -----
aoqi@0:   // |
aoqi@0:   // |      1MB
aoqi@0:   // |      Backing Store (Register Stack)
aoqi@0:   // |
aoqi@0:   // |         / \
aoqi@0:   // |          |
aoqi@0:   // |          |
aoqi@0:   // |          |
aoqi@0:   // ------------------------ stack base -----
aoqi@0:   // |      1MB
aoqi@0:   // |      Memory Stack
aoqi@0:   // |
aoqi@0:   // |          |
aoqi@0:   // |          |
aoqi@0:   // |          |
aoqi@0:   // |         \ /
aoqi@0:   // |
aoqi@0:   // ----- bottom of stack (low address) -----
aoqi@0:   // ...
aoqi@0: 
aoqi@0:   stack_size = stack_size / 2;
aoqi@0: #endif
aoqi@0:   return stack_bottom + stack_size;
aoqi@0: }
aoqi@0: 
aoqi@0: size_t os::current_stack_size() {
aoqi@0:   size_t sz;
aoqi@0:   MEMORY_BASIC_INFORMATION minfo;
aoqi@0:   VirtualQuery(&minfo, &minfo, sizeof(minfo));
aoqi@0:   sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase;
aoqi@0:   return sz;
aoqi@0: }
aoqi@0: 
aoqi@0: struct tm* os::localtime_pd(const time_t* clock, struct tm* res) {
aoqi@0:   const struct tm* time_struct_ptr = localtime(clock);
aoqi@0:   if (time_struct_ptr != NULL) {
aoqi@0:     *res = *time_struct_ptr;
aoqi@0:     return res;
aoqi@0:   }
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo);
aoqi@0: 
aoqi@0: // Thread start routine for all new Java threads
aoqi@0: static unsigned __stdcall java_start(Thread* thread) {
aoqi@0:   // Try to randomize the cache line index of hot stack frames.
aoqi@0:   // This helps when threads of the same stack traces evict each other's
aoqi@0:   // cache lines. The threads can be either from the same JVM instance, or
aoqi@0:   // from different JVM instances. The benefit is especially true for
aoqi@0:   // processors with hyperthreading technology.
aoqi@0:   static int counter = 0;
aoqi@0:   int pid = os::current_process_id();
aoqi@0:   _alloca(((pid ^ counter++) & 7) * 128);
aoqi@0: 
aoqi@0:   OSThread* osthr = thread->osthread();
aoqi@0:   assert(osthr->get_state() == RUNNABLE, "invalid os thread state");
aoqi@0: 
aoqi@0:   if (UseNUMA) {
aoqi@0:     int lgrp_id = os::numa_get_group_id();
aoqi@0:     if (lgrp_id != -1) {
aoqi@0:       thread->set_lgrp_id(lgrp_id);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0: 
aoqi@0:   // Install a win32 structured exception handler around every thread created
aoqi@0:   // by VM, so VM can genrate error dump when an exception occurred in non-
aoqi@0:   // Java thread (e.g. VM thread).
aoqi@0:   __try {
aoqi@0:      thread->run();
aoqi@0:   } __except(topLevelExceptionFilter(
aoqi@0:              (_EXCEPTION_POINTERS*)_exception_info())) {
aoqi@0:       // Nothing to do.
aoqi@0:   }
aoqi@0: 
aoqi@0:   // One less thread is executing
aoqi@0:   // When the VMThread gets here, the main thread may have already exited
aoqi@0:   // which frees the CodeHeap containing the Atomic::add code
aoqi@0:   if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) {
aoqi@0:     Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) {
aoqi@0:   // Allocate the OSThread object
aoqi@0:   OSThread* osthread = new OSThread(NULL, NULL);
aoqi@0:   if (osthread == NULL) return NULL;
aoqi@0: 
aoqi@0:   // Initialize support for Java interrupts
aoqi@0:   HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
aoqi@0:   if (interrupt_event == NULL) {
aoqi@0:     delete osthread;
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0:   osthread->set_interrupt_event(interrupt_event);
aoqi@0: 
aoqi@0:   // Store info on the Win32 thread into the OSThread
aoqi@0:   osthread->set_thread_handle(thread_handle);
aoqi@0:   osthread->set_thread_id(thread_id);
aoqi@0: 
aoqi@0:   if (UseNUMA) {
aoqi@0:     int lgrp_id = os::numa_get_group_id();
aoqi@0:     if (lgrp_id != -1) {
aoqi@0:       thread->set_lgrp_id(lgrp_id);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Initial thread state is INITIALIZED, not SUSPENDED
aoqi@0:   osthread->set_state(INITIALIZED);
aoqi@0: 
aoqi@0:   return osthread;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: bool os::create_attached_thread(JavaThread* thread) {
aoqi@0: #ifdef ASSERT
aoqi@0:   thread->verify_not_published();
aoqi@0: #endif
aoqi@0:   HANDLE thread_h;
aoqi@0:   if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(),
aoqi@0:                        &thread_h, THREAD_ALL_ACCESS, false, 0)) {
aoqi@0:     fatal("DuplicateHandle failed\n");
aoqi@0:   }
aoqi@0:   OSThread* osthread = create_os_thread(thread, thread_h,
aoqi@0:                                         (int)current_thread_id());
aoqi@0:   if (osthread == NULL) {
aoqi@0:      return false;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Initial thread state is RUNNABLE
aoqi@0:   osthread->set_state(RUNNABLE);
aoqi@0: 
aoqi@0:   thread->set_osthread(osthread);
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::create_main_thread(JavaThread* thread) {
aoqi@0: #ifdef ASSERT
aoqi@0:   thread->verify_not_published();
aoqi@0: #endif
aoqi@0:   if (_starting_thread == NULL) {
aoqi@0:     _starting_thread = create_os_thread(thread, main_thread, main_thread_id);
aoqi@0:      if (_starting_thread == NULL) {
aoqi@0:         return false;
aoqi@0:      }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // The primordial thread is runnable from the start)
aoqi@0:   _starting_thread->set_state(RUNNABLE);
aoqi@0: 
aoqi@0:   thread->set_osthread(_starting_thread);
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: // Allocate and initialize a new OSThread
aoqi@0: bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) {
aoqi@0:   unsigned thread_id;
aoqi@0: 
aoqi@0:   // Allocate the OSThread object
aoqi@0:   OSThread* osthread = new OSThread(NULL, NULL);
aoqi@0:   if (osthread == NULL) {
aoqi@0:     return false;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Initialize support for Java interrupts
aoqi@0:   HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
aoqi@0:   if (interrupt_event == NULL) {
aoqi@0:     delete osthread;
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0:   osthread->set_interrupt_event(interrupt_event);
aoqi@0:   osthread->set_interrupted(false);
aoqi@0: 
aoqi@0:   thread->set_osthread(osthread);
aoqi@0: 
aoqi@0:   if (stack_size == 0) {
aoqi@0:     switch (thr_type) {
aoqi@0:     case os::java_thread:
aoqi@0:       // Java threads use ThreadStackSize which default value can be changed with the flag -Xss
aoqi@0:       if (JavaThread::stack_size_at_create() > 0)
aoqi@0:         stack_size = JavaThread::stack_size_at_create();
aoqi@0:       break;
aoqi@0:     case os::compiler_thread:
aoqi@0:       if (CompilerThreadStackSize > 0) {
aoqi@0:         stack_size = (size_t)(CompilerThreadStackSize * K);
aoqi@0:         break;
aoqi@0:       } // else fall through:
aoqi@0:         // use VMThreadStackSize if CompilerThreadStackSize is not defined
aoqi@0:     case os::vm_thread:
aoqi@0:     case os::pgc_thread:
aoqi@0:     case os::cgc_thread:
aoqi@0:     case os::watcher_thread:
aoqi@0:       if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K);
aoqi@0:       break;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Create the Win32 thread
aoqi@0:   //
aoqi@0:   // Contrary to what MSDN document says, "stack_size" in _beginthreadex()
aoqi@0:   // does not specify stack size. Instead, it specifies the size of
aoqi@0:   // initially committed space. The stack size is determined by
aoqi@0:   // PE header in the executable. If the committed "stack_size" is larger
aoqi@0:   // than default value in the PE header, the stack is rounded up to the
aoqi@0:   // nearest multiple of 1MB. For example if the launcher has default
aoqi@0:   // stack size of 320k, specifying any size less than 320k does not
aoqi@0:   // affect the actual stack size at all, it only affects the initial
aoqi@0:   // commitment. On the other hand, specifying 'stack_size' larger than
aoqi@0:   // default value may cause significant increase in memory usage, because
aoqi@0:   // not only the stack space will be rounded up to MB, but also the
aoqi@0:   // entire space is committed upfront.
aoqi@0:   //
aoqi@0:   // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION'
aoqi@0:   // for CreateThread() that can treat 'stack_size' as stack size. However we
aoqi@0:   // are not supposed to call CreateThread() directly according to MSDN
aoqi@0:   // document because JVM uses C runtime library. The good news is that the
aoqi@0:   // flag appears to work with _beginthredex() as well.
aoqi@0: 
aoqi@0: #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
aoqi@0: #define STACK_SIZE_PARAM_IS_A_RESERVATION  (0x10000)
aoqi@0: #endif
aoqi@0: 
aoqi@0:   HANDLE thread_handle =
aoqi@0:     (HANDLE)_beginthreadex(NULL,
aoqi@0:                            (unsigned)stack_size,
aoqi@0:                            (unsigned (__stdcall *)(void*)) java_start,
aoqi@0:                            thread,
aoqi@0:                            CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION,
aoqi@0:                            &thread_id);
aoqi@0:   if (thread_handle == NULL) {
aoqi@0:     // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again
aoqi@0:     // without the flag.
aoqi@0:     thread_handle =
aoqi@0:     (HANDLE)_beginthreadex(NULL,
aoqi@0:                            (unsigned)stack_size,
aoqi@0:                            (unsigned (__stdcall *)(void*)) java_start,
aoqi@0:                            thread,
aoqi@0:                            CREATE_SUSPENDED,
aoqi@0:                            &thread_id);
aoqi@0:   }
aoqi@0:   if (thread_handle == NULL) {
aoqi@0:     // Need to clean up stuff we've allocated so far
aoqi@0:     CloseHandle(osthread->interrupt_event());
aoqi@0:     thread->set_osthread(NULL);
aoqi@0:     delete osthread;
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count);
aoqi@0: 
aoqi@0:   // Store info on the Win32 thread into the OSThread
aoqi@0:   osthread->set_thread_handle(thread_handle);
aoqi@0:   osthread->set_thread_id(thread_id);
aoqi@0: 
aoqi@0:   // Initial thread state is INITIALIZED, not SUSPENDED
aoqi@0:   osthread->set_state(INITIALIZED);
aoqi@0: 
aoqi@0:   // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Free Win32 resources related to the OSThread
aoqi@0: void os::free_thread(OSThread* osthread) {
aoqi@0:   assert(osthread != NULL, "osthread not set");
aoqi@0:   CloseHandle(osthread->thread_handle());
aoqi@0:   CloseHandle(osthread->interrupt_event());
aoqi@0:   delete osthread;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: static int    has_performance_count = 0;
aoqi@0: static jlong first_filetime;
aoqi@0: static jlong initial_performance_count;
aoqi@0: static jlong performance_frequency;
aoqi@0: 
aoqi@0: 
aoqi@0: jlong as_long(LARGE_INTEGER x) {
aoqi@0:   jlong result = 0; // initialization to avoid warning
aoqi@0:   set_high(&result, x.HighPart);
aoqi@0:   set_low(&result,  x.LowPart);
aoqi@0:   return result;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: jlong os::elapsed_counter() {
aoqi@0:   LARGE_INTEGER count;
aoqi@0:   if (has_performance_count) {
aoqi@0:     QueryPerformanceCounter(&count);
aoqi@0:     return as_long(count) - initial_performance_count;
aoqi@0:   } else {
aoqi@0:     FILETIME wt;
aoqi@0:     GetSystemTimeAsFileTime(&wt);
aoqi@0:     return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: jlong os::elapsed_frequency() {
aoqi@0:   if (has_performance_count) {
aoqi@0:     return performance_frequency;
aoqi@0:   } else {
aoqi@0:    // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601.
aoqi@0:    return 10000000;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: julong os::available_memory() {
aoqi@0:   return win32::available_memory();
aoqi@0: }
aoqi@0: 
aoqi@0: julong os::win32::available_memory() {
aoqi@0:   // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
aoqi@0:   // value if total memory is larger than 4GB
aoqi@0:   MEMORYSTATUSEX ms;
aoqi@0:   ms.dwLength = sizeof(ms);
aoqi@0:   GlobalMemoryStatusEx(&ms);
aoqi@0: 
aoqi@0:   return (julong)ms.ullAvailPhys;
aoqi@0: }
aoqi@0: 
aoqi@0: julong os::physical_memory() {
aoqi@0:   return win32::physical_memory();
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::has_allocatable_memory_limit(julong* limit) {
aoqi@0:   MEMORYSTATUSEX ms;
aoqi@0:   ms.dwLength = sizeof(ms);
aoqi@0:   GlobalMemoryStatusEx(&ms);
aoqi@0: #ifdef _LP64
aoqi@0:   *limit = (julong)ms.ullAvailVirtual;
aoqi@0:   return true;
aoqi@0: #else
aoqi@0:   // Limit to 1400m because of the 2gb address space wall
aoqi@0:   *limit = MIN2((julong)1400*M, (julong)ms.ullAvailVirtual);
aoqi@0:   return true;
aoqi@0: #endif
aoqi@0: }
aoqi@0: 
aoqi@0: // VC6 lacks DWORD_PTR
aoqi@0: #if _MSC_VER < 1300
aoqi@0: typedef UINT_PTR DWORD_PTR;
aoqi@0: #endif
aoqi@0: 
aoqi@0: int os::active_processor_count() {
aoqi@0:   DWORD_PTR lpProcessAffinityMask = 0;
aoqi@0:   DWORD_PTR lpSystemAffinityMask = 0;
aoqi@0:   int proc_count = processor_count();
aoqi@0:   if (proc_count <= sizeof(UINT_PTR) * BitsPerByte &&
aoqi@0:       GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) {
aoqi@0:     // Nof active processors is number of bits in process affinity mask
aoqi@0:     int bitcount = 0;
aoqi@0:     while (lpProcessAffinityMask != 0) {
aoqi@0:       lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1);
aoqi@0:       bitcount++;
aoqi@0:     }
aoqi@0:     return bitcount;
aoqi@0:   } else {
aoqi@0:     return proc_count;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::set_native_thread_name(const char *name) {
aoqi@0:   // Not yet implemented.
aoqi@0:   return;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::distribute_processes(uint length, uint* distribution) {
aoqi@0:   // Not yet implemented.
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::bind_to_processor(uint processor_id) {
aoqi@0:   // Not yet implemented.
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: static void initialize_performance_counter() {
aoqi@0:   LARGE_INTEGER count;
aoqi@0:   if (QueryPerformanceFrequency(&count)) {
aoqi@0:     has_performance_count = 1;
aoqi@0:     performance_frequency = as_long(count);
aoqi@0:     QueryPerformanceCounter(&count);
aoqi@0:     initial_performance_count = as_long(count);
aoqi@0:   } else {
aoqi@0:     has_performance_count = 0;
aoqi@0:     FILETIME wt;
aoqi@0:     GetSystemTimeAsFileTime(&wt);
aoqi@0:     first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: double os::elapsedTime() {
aoqi@0:   return (double) elapsed_counter() / (double) elapsed_frequency();
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Windows format:
aoqi@0: //   The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601.
aoqi@0: // Java format:
aoqi@0: //   Java standards require the number of milliseconds since 1/1/1970
aoqi@0: 
aoqi@0: // Constant offset - calculated using offset()
aoqi@0: static jlong  _offset   = 116444736000000000;
aoqi@0: // Fake time counter for reproducible results when debugging
aoqi@0: static jlong  fake_time = 0;
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0: // Just to be safe, recalculate the offset in debug mode
aoqi@0: static jlong _calculated_offset = 0;
aoqi@0: static int   _has_calculated_offset = 0;
aoqi@0: 
aoqi@0: jlong offset() {
aoqi@0:   if (_has_calculated_offset) return _calculated_offset;
aoqi@0:   SYSTEMTIME java_origin;
aoqi@0:   java_origin.wYear          = 1970;
aoqi@0:   java_origin.wMonth         = 1;
aoqi@0:   java_origin.wDayOfWeek     = 0; // ignored
aoqi@0:   java_origin.wDay           = 1;
aoqi@0:   java_origin.wHour          = 0;
aoqi@0:   java_origin.wMinute        = 0;
aoqi@0:   java_origin.wSecond        = 0;
aoqi@0:   java_origin.wMilliseconds  = 0;
aoqi@0:   FILETIME jot;
aoqi@0:   if (!SystemTimeToFileTime(&java_origin, &jot)) {
aoqi@0:     fatal(err_msg("Error = %d\nWindows error", GetLastError()));
aoqi@0:   }
aoqi@0:   _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime);
aoqi@0:   _has_calculated_offset = 1;
aoqi@0:   assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal");
aoqi@0:   return _calculated_offset;
aoqi@0: }
aoqi@0: #else
aoqi@0: jlong offset() {
aoqi@0:   return _offset;
aoqi@0: }
aoqi@0: #endif
aoqi@0: 
aoqi@0: jlong windows_to_java_time(FILETIME wt) {
aoqi@0:   jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime);
aoqi@0:   return (a - offset()) / 10000;
aoqi@0: }
aoqi@0: 
aoqi@0: FILETIME java_to_windows_time(jlong l) {
aoqi@0:   jlong a = (l * 10000) + offset();
aoqi@0:   FILETIME result;
aoqi@0:   result.dwHighDateTime = high(a);
aoqi@0:   result.dwLowDateTime  = low(a);
aoqi@0:   return result;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::supports_vtime() { return true; }
aoqi@0: bool os::enable_vtime() { return false; }
aoqi@0: bool os::vtime_enabled() { return false; }
aoqi@0: 
aoqi@0: double os::elapsedVTime() {
aoqi@0:   FILETIME created;
aoqi@0:   FILETIME exited;
aoqi@0:   FILETIME kernel;
aoqi@0:   FILETIME user;
aoqi@0:   if (GetThreadTimes(GetCurrentThread(), &created, &exited, &kernel, &user) != 0) {
aoqi@0:     // the resolution of windows_to_java_time() should be sufficient (ms)
aoqi@0:     return (double) (windows_to_java_time(kernel) + windows_to_java_time(user)) / MILLIUNITS;
aoqi@0:   } else {
aoqi@0:     return elapsedTime();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: jlong os::javaTimeMillis() {
aoqi@0:   if (UseFakeTimers) {
aoqi@0:     return fake_time++;
aoqi@0:   } else {
aoqi@0:     FILETIME wt;
aoqi@0:     GetSystemTimeAsFileTime(&wt);
aoqi@0:     return windows_to_java_time(wt);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: jlong os::javaTimeNanos() {
aoqi@0:   if (!has_performance_count) {
aoqi@0:     return javaTimeMillis() * NANOSECS_PER_MILLISEC; // the best we can do.
aoqi@0:   } else {
aoqi@0:     LARGE_INTEGER current_count;
aoqi@0:     QueryPerformanceCounter(&current_count);
aoqi@0:     double current = as_long(current_count);
aoqi@0:     double freq = performance_frequency;
aoqi@0:     jlong time = (jlong)((current/freq) * NANOSECS_PER_SEC);
aoqi@0:     return time;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) {
aoqi@0:   if (!has_performance_count) {
aoqi@0:     // javaTimeMillis() doesn't have much percision,
aoqi@0:     // but it is not going to wrap -- so all 64 bits
aoqi@0:     info_ptr->max_value = ALL_64_BITS;
aoqi@0: 
aoqi@0:     // this is a wall clock timer, so may skip
aoqi@0:     info_ptr->may_skip_backward = true;
aoqi@0:     info_ptr->may_skip_forward = true;
aoqi@0:   } else {
aoqi@0:     jlong freq = performance_frequency;
aoqi@0:     if (freq < NANOSECS_PER_SEC) {
aoqi@0:       // the performance counter is 64 bits and we will
aoqi@0:       // be multiplying it -- so no wrap in 64 bits
aoqi@0:       info_ptr->max_value = ALL_64_BITS;
aoqi@0:     } else if (freq > NANOSECS_PER_SEC) {
aoqi@0:       // use the max value the counter can reach to
aoqi@0:       // determine the max value which could be returned
aoqi@0:       julong max_counter = (julong)ALL_64_BITS;
aoqi@0:       info_ptr->max_value = (jlong)(max_counter / (freq / NANOSECS_PER_SEC));
aoqi@0:     } else {
aoqi@0:       // the performance counter is 64 bits and we will
aoqi@0:       // be using it directly -- so no wrap in 64 bits
aoqi@0:       info_ptr->max_value = ALL_64_BITS;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // using a counter, so no skipping
aoqi@0:     info_ptr->may_skip_backward = false;
aoqi@0:     info_ptr->may_skip_forward = false;
aoqi@0:   }
aoqi@0:   info_ptr->kind = JVMTI_TIMER_ELAPSED;                // elapsed not CPU time
aoqi@0: }
aoqi@0: 
aoqi@0: char* os::local_time_string(char *buf, size_t buflen) {
aoqi@0:   SYSTEMTIME st;
aoqi@0:   GetLocalTime(&st);
aoqi@0:   jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d",
aoqi@0:                st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond);
aoqi@0:   return buf;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::getTimesSecs(double* process_real_time,
aoqi@0:                      double* process_user_time,
aoqi@0:                      double* process_system_time) {
aoqi@0:   HANDLE h_process = GetCurrentProcess();
aoqi@0:   FILETIME create_time, exit_time, kernel_time, user_time;
aoqi@0:   BOOL result = GetProcessTimes(h_process,
aoqi@0:                                &create_time,
aoqi@0:                                &exit_time,
aoqi@0:                                &kernel_time,
aoqi@0:                                &user_time);
aoqi@0:   if (result != 0) {
aoqi@0:     FILETIME wt;
aoqi@0:     GetSystemTimeAsFileTime(&wt);
aoqi@0:     jlong rtc_millis = windows_to_java_time(wt);
aoqi@0:     jlong user_millis = windows_to_java_time(user_time);
aoqi@0:     jlong system_millis = windows_to_java_time(kernel_time);
aoqi@0:     *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS);
aoqi@0:     *process_user_time = ((double) user_millis) / ((double) MILLIUNITS);
aoqi@0:     *process_system_time = ((double) system_millis) / ((double) MILLIUNITS);
aoqi@0:     return true;
aoqi@0:   } else {
aoqi@0:     return false;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::shutdown() {
aoqi@0: 
aoqi@0:   // allow PerfMemory to attempt cleanup of any persistent resources
aoqi@0:   perfMemory_exit();
aoqi@0: 
aoqi@0:   // flush buffered output, finish log files
aoqi@0:   ostream_abort();
aoqi@0: 
aoqi@0:   // Check for abort hook
aoqi@0:   abort_hook_t abort_hook = Arguments::abort_hook();
aoqi@0:   if (abort_hook != NULL) {
aoqi@0:     abort_hook();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: static BOOL  (WINAPI *_MiniDumpWriteDump)  ( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
aoqi@0:                                             PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION);
aoqi@0: 
aoqi@0: void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
aoqi@0:   HINSTANCE dbghelp;
aoqi@0:   EXCEPTION_POINTERS ep;
aoqi@0:   MINIDUMP_EXCEPTION_INFORMATION mei;
aoqi@0:   MINIDUMP_EXCEPTION_INFORMATION* pmei;
aoqi@0: 
aoqi@0:   HANDLE hProcess = GetCurrentProcess();
aoqi@0:   DWORD processId = GetCurrentProcessId();
aoqi@0:   HANDLE dumpFile;
aoqi@0:   MINIDUMP_TYPE dumpType;
aoqi@0:   static const char* cwd;
aoqi@0: 
aoqi@0: // Default is to always create dump for debug builds, on product builds only dump on server versions of Windows.
aoqi@0: #ifndef ASSERT
aoqi@0:   // If running on a client version of Windows and user has not explicitly enabled dumping
aoqi@0:   if (!os::win32::is_windows_server() && !CreateMinidumpOnCrash) {
aoqi@0:     VMError::report_coredump_status("Minidumps are not enabled by default on client versions of Windows", false);
aoqi@0:     return;
aoqi@0:     // If running on a server version of Windows and user has explictly disabled dumping
aoqi@0:   } else if (os::win32::is_windows_server() && !FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) {
aoqi@0:     VMError::report_coredump_status("Minidump has been disabled from the command line", false);
aoqi@0:     return;
aoqi@0:   }
aoqi@0: #else
aoqi@0:   if (!FLAG_IS_DEFAULT(CreateMinidumpOnCrash) && !CreateMinidumpOnCrash) {
aoqi@0:     VMError::report_coredump_status("Minidump has been disabled from the command line", false);
aoqi@0:     return;
aoqi@0:   }
aoqi@0: #endif
aoqi@0: 
aoqi@0:   dbghelp = os::win32::load_Windows_dll("DBGHELP.DLL", NULL, 0);
aoqi@0: 
aoqi@0:   if (dbghelp == NULL) {
aoqi@0:     VMError::report_coredump_status("Failed to load dbghelp.dll", false);
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   _MiniDumpWriteDump = CAST_TO_FN_PTR(
aoqi@0:     BOOL(WINAPI *)( HANDLE, DWORD, HANDLE, MINIDUMP_TYPE, PMINIDUMP_EXCEPTION_INFORMATION,
aoqi@0:     PMINIDUMP_USER_STREAM_INFORMATION, PMINIDUMP_CALLBACK_INFORMATION),
aoqi@0:     GetProcAddress(dbghelp, "MiniDumpWriteDump"));
aoqi@0: 
aoqi@0:   if (_MiniDumpWriteDump == NULL) {
aoqi@0:     VMError::report_coredump_status("Failed to find MiniDumpWriteDump() in module dbghelp.dll", false);
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   dumpType = (MINIDUMP_TYPE)(MiniDumpWithFullMemory | MiniDumpWithHandleData);
aoqi@0: 
aoqi@0: // Older versions of dbghelp.h doesn't contain all the dumptypes we want, dbghelp.h with
aoqi@0: // API_VERSION_NUMBER 11 or higher contains the ones we want though
aoqi@0: #if API_VERSION_NUMBER >= 11
aoqi@0:   dumpType = (MINIDUMP_TYPE)(dumpType | MiniDumpWithFullMemoryInfo | MiniDumpWithThreadInfo |
aoqi@0:     MiniDumpWithUnloadedModules);
aoqi@0: #endif
aoqi@0: 
aoqi@0:   cwd = get_current_directory(NULL, 0);
aoqi@0:   jio_snprintf(buffer, bufferSize, "%s\\hs_err_pid%u.mdmp",cwd, current_process_id());
aoqi@0:   dumpFile = CreateFile(buffer, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
aoqi@0: 
aoqi@0:   if (dumpFile == INVALID_HANDLE_VALUE) {
aoqi@0:     VMError::report_coredump_status("Failed to create file for dumping", false);
aoqi@0:     return;
aoqi@0:   }
aoqi@0:   if (exceptionRecord != NULL && contextRecord != NULL) {
aoqi@0:     ep.ContextRecord = (PCONTEXT) contextRecord;
aoqi@0:     ep.ExceptionRecord = (PEXCEPTION_RECORD) exceptionRecord;
aoqi@0: 
aoqi@0:     mei.ThreadId = GetCurrentThreadId();
aoqi@0:     mei.ExceptionPointers = &ep;
aoqi@0:     pmei = &mei;
aoqi@0:   } else {
aoqi@0:     pmei = NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0: 
aoqi@0:   // Older versions of dbghelp.dll (the one shipped with Win2003 for example) may not support all
aoqi@0:   // the dump types we really want. If first call fails, lets fall back to just use MiniDumpWithFullMemory then.
aoqi@0:   if (_MiniDumpWriteDump(hProcess, processId, dumpFile, dumpType, pmei, NULL, NULL) == false &&
aoqi@0:       _MiniDumpWriteDump(hProcess, processId, dumpFile, (MINIDUMP_TYPE)MiniDumpWithFullMemory, pmei, NULL, NULL) == false) {
aoqi@0:         DWORD error = GetLastError();
aoqi@0:         LPTSTR msgbuf = NULL;
aoqi@0: 
aoqi@0:         if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
aoqi@0:                       FORMAT_MESSAGE_FROM_SYSTEM |
aoqi@0:                       FORMAT_MESSAGE_IGNORE_INSERTS,
aoqi@0:                       NULL, error, 0, (LPTSTR)&msgbuf, 0, NULL) != 0) {
aoqi@0: 
aoqi@0:           jio_snprintf(buffer, bufferSize, "Call to MiniDumpWriteDump() failed (Error 0x%x: %s)", error, msgbuf);
aoqi@0:           LocalFree(msgbuf);
aoqi@0:         } else {
aoqi@0:           // Call to FormatMessage failed, just include the result from GetLastError
aoqi@0:           jio_snprintf(buffer, bufferSize, "Call to MiniDumpWriteDump() failed (Error 0x%x)", error);
aoqi@0:         }
aoqi@0:         VMError::report_coredump_status(buffer, false);
aoqi@0:   } else {
aoqi@0:     VMError::report_coredump_status(buffer, true);
aoqi@0:   }
aoqi@0: 
aoqi@0:   CloseHandle(dumpFile);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: void os::abort(bool dump_core)
aoqi@0: {
aoqi@0:   os::shutdown();
aoqi@0:   // no core dump on Windows
aoqi@0:   ::exit(1);
aoqi@0: }
aoqi@0: 
aoqi@0: // Die immediately, no exit hook, no abort hook, no cleanup.
aoqi@0: void os::die() {
aoqi@0:   _exit(-1);
aoqi@0: }
aoqi@0: 
aoqi@0: // Directory routines copied from src/win32/native/java/io/dirent_md.c
aoqi@0: //  * dirent_md.c       1.15 00/02/02
aoqi@0: //
aoqi@0: // The declarations for DIR and struct dirent are in jvm_win32.h.
aoqi@0: 
aoqi@0: /* Caller must have already run dirname through JVM_NativePath, which removes
aoqi@0:    duplicate slashes and converts all instances of '/' into '\\'. */
aoqi@0: 
aoqi@0: DIR *
aoqi@0: os::opendir(const char *dirname)
aoqi@0: {
aoqi@0:     assert(dirname != NULL, "just checking");   // hotspot change
aoqi@0:     DIR *dirp = (DIR *)malloc(sizeof(DIR), mtInternal);
aoqi@0:     DWORD fattr;                                // hotspot change
aoqi@0:     char alt_dirname[4] = { 0, 0, 0, 0 };
aoqi@0: 
aoqi@0:     if (dirp == 0) {
aoqi@0:         errno = ENOMEM;
aoqi@0:         return 0;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /*
aoqi@0:      * Win32 accepts "\" in its POSIX stat(), but refuses to treat it
aoqi@0:      * as a directory in FindFirstFile().  We detect this case here and
aoqi@0:      * prepend the current drive name.
aoqi@0:      */
aoqi@0:     if (dirname[1] == '\0' && dirname[0] == '\\') {
aoqi@0:         alt_dirname[0] = _getdrive() + 'A' - 1;
aoqi@0:         alt_dirname[1] = ':';
aoqi@0:         alt_dirname[2] = '\\';
aoqi@0:         alt_dirname[3] = '\0';
aoqi@0:         dirname = alt_dirname;
aoqi@0:     }
aoqi@0: 
aoqi@0:     dirp->path = (char *)malloc(strlen(dirname) + 5, mtInternal);
aoqi@0:     if (dirp->path == 0) {
aoqi@0:         free(dirp, mtInternal);
aoqi@0:         errno = ENOMEM;
aoqi@0:         return 0;
aoqi@0:     }
aoqi@0:     strcpy(dirp->path, dirname);
aoqi@0: 
aoqi@0:     fattr = GetFileAttributes(dirp->path);
aoqi@0:     if (fattr == 0xffffffff) {
aoqi@0:         free(dirp->path, mtInternal);
aoqi@0:         free(dirp, mtInternal);
aoqi@0:         errno = ENOENT;
aoqi@0:         return 0;
aoqi@0:     } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
aoqi@0:         free(dirp->path, mtInternal);
aoqi@0:         free(dirp, mtInternal);
aoqi@0:         errno = ENOTDIR;
aoqi@0:         return 0;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /* Append "*.*", or possibly "\\*.*", to path */
aoqi@0:     if (dirp->path[1] == ':'
aoqi@0:         && (dirp->path[2] == '\0'
aoqi@0:             || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) {
aoqi@0:         /* No '\\' needed for cases like "Z:" or "Z:\" */
aoqi@0:         strcat(dirp->path, "*.*");
aoqi@0:     } else {
aoqi@0:         strcat(dirp->path, "\\*.*");
aoqi@0:     }
aoqi@0: 
aoqi@0:     dirp->handle = FindFirstFile(dirp->path, &dirp->find_data);
aoqi@0:     if (dirp->handle == INVALID_HANDLE_VALUE) {
aoqi@0:         if (GetLastError() != ERROR_FILE_NOT_FOUND) {
aoqi@0:             free(dirp->path, mtInternal);
aoqi@0:             free(dirp, mtInternal);
aoqi@0:             errno = EACCES;
aoqi@0:             return 0;
aoqi@0:         }
aoqi@0:     }
aoqi@0:     return dirp;
aoqi@0: }
aoqi@0: 
aoqi@0: /* parameter dbuf unused on Windows */
aoqi@0: 
aoqi@0: struct dirent *
aoqi@0: os::readdir(DIR *dirp, dirent *dbuf)
aoqi@0: {
aoqi@0:     assert(dirp != NULL, "just checking");      // hotspot change
aoqi@0:     if (dirp->handle == INVALID_HANDLE_VALUE) {
aoqi@0:         return 0;
aoqi@0:     }
aoqi@0: 
aoqi@0:     strcpy(dirp->dirent.d_name, dirp->find_data.cFileName);
aoqi@0: 
aoqi@0:     if (!FindNextFile(dirp->handle, &dirp->find_data)) {
aoqi@0:         if (GetLastError() == ERROR_INVALID_HANDLE) {
aoqi@0:             errno = EBADF;
aoqi@0:             return 0;
aoqi@0:         }
aoqi@0:         FindClose(dirp->handle);
aoqi@0:         dirp->handle = INVALID_HANDLE_VALUE;
aoqi@0:     }
aoqi@0: 
aoqi@0:     return &dirp->dirent;
aoqi@0: }
aoqi@0: 
aoqi@0: int
aoqi@0: os::closedir(DIR *dirp)
aoqi@0: {
aoqi@0:     assert(dirp != NULL, "just checking");      // hotspot change
aoqi@0:     if (dirp->handle != INVALID_HANDLE_VALUE) {
aoqi@0:         if (!FindClose(dirp->handle)) {
aoqi@0:             errno = EBADF;
aoqi@0:             return -1;
aoqi@0:         }
aoqi@0:         dirp->handle = INVALID_HANDLE_VALUE;
aoqi@0:     }
aoqi@0:     free(dirp->path, mtInternal);
aoqi@0:     free(dirp, mtInternal);
aoqi@0:     return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: // This must be hard coded because it's the system's temporary
aoqi@0: // directory not the java application's temp directory, ala java.io.tmpdir.
aoqi@0: const char* os::get_temp_directory() {
aoqi@0:   static char path_buf[MAX_PATH];
aoqi@0:   if (GetTempPath(MAX_PATH, path_buf)>0)
aoqi@0:     return path_buf;
aoqi@0:   else{
aoqi@0:     path_buf[0]='\0';
aoqi@0:     return path_buf;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: static bool file_exists(const char* filename) {
aoqi@0:   if (filename == NULL || strlen(filename) == 0) {
aoqi@0:     return false;
aoqi@0:   }
aoqi@0:   return GetFileAttributes(filename) != INVALID_FILE_ATTRIBUTES;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::dll_build_name(char *buffer, size_t buflen,
aoqi@0:                         const char* pname, const char* fname) {
aoqi@0:   bool retval = false;
aoqi@0:   const size_t pnamelen = pname ? strlen(pname) : 0;
aoqi@0:   const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0;
aoqi@0: 
aoqi@0:   // Return error on buffer overflow.
aoqi@0:   if (pnamelen + strlen(fname) + 10 > buflen) {
aoqi@0:     return retval;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (pnamelen == 0) {
aoqi@0:     jio_snprintf(buffer, buflen, "%s.dll", fname);
aoqi@0:     retval = true;
aoqi@0:   } else if (c == ':' || c == '\\') {
aoqi@0:     jio_snprintf(buffer, buflen, "%s%s.dll", pname, fname);
aoqi@0:     retval = true;
aoqi@0:   } else if (strchr(pname, *os::path_separator()) != NULL) {
aoqi@0:     int n;
aoqi@0:     char** pelements = split_path(pname, &n);
aoqi@0:     if (pelements == NULL) {
aoqi@0:       return false;
aoqi@0:     }
aoqi@0:     for (int i = 0 ; i < n ; i++) {
aoqi@0:       char* path = pelements[i];
aoqi@0:       // Really shouldn't be NULL, but check can't hurt
aoqi@0:       size_t plen = (path == NULL) ? 0 : strlen(path);
aoqi@0:       if (plen == 0) {
aoqi@0:         continue; // skip the empty path values
aoqi@0:       }
aoqi@0:       const char lastchar = path[plen - 1];
aoqi@0:       if (lastchar == ':' || lastchar == '\\') {
aoqi@0:         jio_snprintf(buffer, buflen, "%s%s.dll", path, fname);
aoqi@0:       } else {
aoqi@0:         jio_snprintf(buffer, buflen, "%s\\%s.dll", path, fname);
aoqi@0:       }
aoqi@0:       if (file_exists(buffer)) {
aoqi@0:         retval = true;
aoqi@0:         break;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     // release the storage
aoqi@0:     for (int i = 0 ; i < n ; i++) {
aoqi@0:       if (pelements[i] != NULL) {
aoqi@0:         FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal);
aoqi@0:       }
aoqi@0:     }
aoqi@0:     if (pelements != NULL) {
aoqi@0:       FREE_C_HEAP_ARRAY(char*, pelements, mtInternal);
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     jio_snprintf(buffer, buflen, "%s\\%s.dll", pname, fname);
aoqi@0:     retval = true;
aoqi@0:   }
aoqi@0:   return retval;
aoqi@0: }
aoqi@0: 
aoqi@0: // Needs to be in os specific directory because windows requires another
aoqi@0: // header file <direct.h>
aoqi@0: const char* os::get_current_directory(char *buf, size_t buflen) {
aoqi@0:   int n = static_cast<int>(buflen);
aoqi@0:   if (buflen > INT_MAX)  n = INT_MAX;
aoqi@0:   return _getcwd(buf, n);
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------------------------------------
aoqi@0: // Helper functions for fatal error handler
aoqi@0: #ifdef _WIN64
aoqi@0: // Helper routine which returns true if address in
aoqi@0: // within the NTDLL address space.
aoqi@0: //
aoqi@0: static bool _addr_in_ntdll( address addr )
aoqi@0: {
aoqi@0:   HMODULE hmod;
aoqi@0:   MODULEINFO minfo;
aoqi@0: 
aoqi@0:   hmod = GetModuleHandle("NTDLL.DLL");
aoqi@0:   if ( hmod == NULL ) return false;
aoqi@0:   if ( !os::PSApiDll::GetModuleInformation( GetCurrentProcess(), hmod,
aoqi@0:                                &minfo, sizeof(MODULEINFO)) )
aoqi@0:     return false;
aoqi@0: 
aoqi@0:   if ( (addr >= minfo.lpBaseOfDll) &&
aoqi@0:        (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage)))
aoqi@0:     return true;
aoqi@0:   else
aoqi@0:     return false;
aoqi@0: }
aoqi@0: #endif
aoqi@0: 
aoqi@0: 
aoqi@0: // Enumerate all modules for a given process ID
aoqi@0: //
aoqi@0: // Notice that Windows 95/98/Me and Windows NT/2000/XP have
aoqi@0: // different API for doing this. We use PSAPI.DLL on NT based
aoqi@0: // Windows and ToolHelp on 95/98/Me.
aoqi@0: 
aoqi@0: // Callback function that is called by enumerate_modules() on
aoqi@0: // every DLL module.
aoqi@0: // Input parameters:
aoqi@0: //    int       pid,
aoqi@0: //    char*     module_file_name,
aoqi@0: //    address   module_base_addr,
aoqi@0: //    unsigned  module_size,
aoqi@0: //    void*     param
aoqi@0: typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *);
aoqi@0: 
aoqi@0: // enumerate_modules for Windows NT, using PSAPI
aoqi@0: static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param)
aoqi@0: {
aoqi@0:   HANDLE   hProcess ;
aoqi@0: 
aoqi@0: # define MAX_NUM_MODULES 128
aoqi@0:   HMODULE     modules[MAX_NUM_MODULES];
aoqi@0:   static char filename[ MAX_PATH ];
aoqi@0:   int         result = 0;
aoqi@0: 
aoqi@0:   if (!os::PSApiDll::PSApiAvailable()) {
aoqi@0:     return 0;
aoqi@0:   }
aoqi@0: 
aoqi@0:   hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
aoqi@0:                          FALSE, pid ) ;
aoqi@0:   if (hProcess == NULL) return 0;
aoqi@0: 
aoqi@0:   DWORD size_needed;
aoqi@0:   if (!os::PSApiDll::EnumProcessModules(hProcess, modules,
aoqi@0:                            sizeof(modules), &size_needed)) {
aoqi@0:       CloseHandle( hProcess );
aoqi@0:       return 0;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // number of modules that are currently loaded
aoqi@0:   int num_modules = size_needed / sizeof(HMODULE);
aoqi@0: 
aoqi@0:   for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) {
aoqi@0:     // Get Full pathname:
aoqi@0:     if(!os::PSApiDll::GetModuleFileNameEx(hProcess, modules[i],
aoqi@0:                              filename, sizeof(filename))) {
aoqi@0:         filename[0] = '\0';
aoqi@0:     }
aoqi@0: 
aoqi@0:     MODULEINFO modinfo;
aoqi@0:     if (!os::PSApiDll::GetModuleInformation(hProcess, modules[i],
aoqi@0:                                &modinfo, sizeof(modinfo))) {
aoqi@0:         modinfo.lpBaseOfDll = NULL;
aoqi@0:         modinfo.SizeOfImage = 0;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Invoke callback function
aoqi@0:     result = func(pid, filename, (address)modinfo.lpBaseOfDll,
aoqi@0:                   modinfo.SizeOfImage, param);
aoqi@0:     if (result) break;
aoqi@0:   }
aoqi@0: 
aoqi@0:   CloseHandle( hProcess ) ;
aoqi@0:   return result;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // enumerate_modules for Windows 95/98/ME, using TOOLHELP
aoqi@0: static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param)
aoqi@0: {
aoqi@0:   HANDLE                hSnapShot ;
aoqi@0:   static MODULEENTRY32  modentry ;
aoqi@0:   int                   result = 0;
aoqi@0: 
aoqi@0:   if (!os::Kernel32Dll::HelpToolsAvailable()) {
aoqi@0:     return 0;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Get a handle to a Toolhelp snapshot of the system
aoqi@0:   hSnapShot = os::Kernel32Dll::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ;
aoqi@0:   if( hSnapShot == INVALID_HANDLE_VALUE ) {
aoqi@0:       return FALSE ;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // iterate through all modules
aoqi@0:   modentry.dwSize = sizeof(MODULEENTRY32) ;
aoqi@0:   bool not_done = os::Kernel32Dll::Module32First( hSnapShot, &modentry ) != 0;
aoqi@0: 
aoqi@0:   while( not_done ) {
aoqi@0:     // invoke the callback
aoqi@0:     result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr,
aoqi@0:                 modentry.modBaseSize, param);
aoqi@0:     if (result) break;
aoqi@0: 
aoqi@0:     modentry.dwSize = sizeof(MODULEENTRY32) ;
aoqi@0:     not_done = os::Kernel32Dll::Module32Next( hSnapShot, &modentry ) != 0;
aoqi@0:   }
aoqi@0: 
aoqi@0:   CloseHandle(hSnapShot);
aoqi@0:   return result;
aoqi@0: }
aoqi@0: 
aoqi@0: int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param )
aoqi@0: {
aoqi@0:   // Get current process ID if caller doesn't provide it.
aoqi@0:   if (!pid) pid = os::current_process_id();
aoqi@0: 
aoqi@0:   if (os::win32::is_nt()) return _enumerate_modules_winnt  (pid, func, param);
aoqi@0:   else                    return _enumerate_modules_windows(pid, func, param);
aoqi@0: }
aoqi@0: 
aoqi@0: struct _modinfo {
aoqi@0:    address addr;
aoqi@0:    char*   full_path;   // point to a char buffer
aoqi@0:    int     buflen;      // size of the buffer
aoqi@0:    address base_addr;
aoqi@0: };
aoqi@0: 
aoqi@0: static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr,
aoqi@0:                                   unsigned size, void * param) {
aoqi@0:    struct _modinfo *pmod = (struct _modinfo *)param;
aoqi@0:    if (!pmod) return -1;
aoqi@0: 
aoqi@0:    if (base_addr     <= pmod->addr &&
aoqi@0:        base_addr+size > pmod->addr) {
aoqi@0:      // if a buffer is provided, copy path name to the buffer
aoqi@0:      if (pmod->full_path) {
aoqi@0:        jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname);
aoqi@0:      }
aoqi@0:      pmod->base_addr = base_addr;
aoqi@0:      return 1;
aoqi@0:    }
aoqi@0:    return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::dll_address_to_library_name(address addr, char* buf,
aoqi@0:                                      int buflen, int* offset) {
aoqi@0:   // buf is not optional, but offset is optional
aoqi@0:   assert(buf != NULL, "sanity check");
aoqi@0: 
aoqi@0: // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always
aoqi@0: //       return the full path to the DLL file, sometimes it returns path
aoqi@0: //       to the corresponding PDB file (debug info); sometimes it only
aoqi@0: //       returns partial path, which makes life painful.
aoqi@0: 
aoqi@0:   struct _modinfo mi;
aoqi@0:   mi.addr      = addr;
aoqi@0:   mi.full_path = buf;
aoqi@0:   mi.buflen    = buflen;
aoqi@0:   int pid = os::current_process_id();
aoqi@0:   if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) {
aoqi@0:     // buf already contains path name
aoqi@0:     if (offset) *offset = addr - mi.base_addr;
aoqi@0:     return true;
aoqi@0:   }
aoqi@0: 
aoqi@0:   buf[0] = '\0';
aoqi@0:   if (offset) *offset = -1;
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::dll_address_to_function_name(address addr, char *buf,
aoqi@0:                                       int buflen, int *offset) {
aoqi@0:   // buf is not optional, but offset is optional
aoqi@0:   assert(buf != NULL, "sanity check");
aoqi@0: 
aoqi@0:   if (Decoder::decode(addr, buf, buflen, offset)) {
aoqi@0:     return true;
aoqi@0:   }
aoqi@0:   if (offset != NULL)  *offset  = -1;
aoqi@0:   buf[0] = '\0';
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: // save the start and end address of jvm.dll into param[0] and param[1]
aoqi@0: static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr,
aoqi@0:                     unsigned size, void * param) {
aoqi@0:    if (!param) return -1;
aoqi@0: 
aoqi@0:    if (base_addr     <= (address)_locate_jvm_dll &&
aoqi@0:        base_addr+size > (address)_locate_jvm_dll) {
aoqi@0:          ((address*)param)[0] = base_addr;
aoqi@0:          ((address*)param)[1] = base_addr + size;
aoqi@0:          return 1;
aoqi@0:    }
aoqi@0:    return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: address vm_lib_location[2];    // start and end address of jvm.dll
aoqi@0: 
aoqi@0: // check if addr is inside jvm.dll
aoqi@0: bool os::address_is_in_vm(address addr) {
aoqi@0:   if (!vm_lib_location[0] || !vm_lib_location[1]) {
aoqi@0:     int pid = os::current_process_id();
aoqi@0:     if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) {
aoqi@0:       assert(false, "Can't find jvm module.");
aoqi@0:       return false;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]);
aoqi@0: }
aoqi@0: 
aoqi@0: // print module info; param is outputStream*
aoqi@0: static int _print_module(int pid, char* fname, address base,
aoqi@0:                          unsigned size, void* param) {
aoqi@0:    if (!param) return -1;
aoqi@0: 
aoqi@0:    outputStream* st = (outputStream*)param;
aoqi@0: 
aoqi@0:    address end_addr = base + size;
aoqi@0:    st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname);
aoqi@0:    return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: // Loads .dll/.so and
aoqi@0: // in case of error it checks if .dll/.so was built for the
aoqi@0: // same architecture as Hotspot is running on
aoqi@0: void * os::dll_load(const char *name, char *ebuf, int ebuflen)
aoqi@0: {
aoqi@0:   void * result = LoadLibrary(name);
aoqi@0:   if (result != NULL)
aoqi@0:   {
aoqi@0:     return result;
aoqi@0:   }
aoqi@0: 
aoqi@0:   DWORD errcode = GetLastError();
aoqi@0:   if (errcode == ERROR_MOD_NOT_FOUND) {
aoqi@0:     strncpy(ebuf, "Can't find dependent libraries", ebuflen-1);
aoqi@0:     ebuf[ebuflen-1]='\0';
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Parsing dll below
aoqi@0:   // If we can read dll-info and find that dll was built
aoqi@0:   // for an architecture other than Hotspot is running in
aoqi@0:   // - then print to buffer "DLL was built for a different architecture"
aoqi@0:   // else call os::lasterror to obtain system error message
aoqi@0: 
aoqi@0:   // Read system error message into ebuf
aoqi@0:   // It may or may not be overwritten below (in the for loop and just above)
aoqi@0:   lasterror(ebuf, (size_t) ebuflen);
aoqi@0:   ebuf[ebuflen-1]='\0';
aoqi@0:   int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0);
aoqi@0:   if (file_descriptor<0)
aoqi@0:   {
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   uint32_t signature_offset;
aoqi@0:   uint16_t lib_arch=0;
aoqi@0:   bool failed_to_get_lib_arch=
aoqi@0:   (
aoqi@0:     //Go to position 3c in the dll
aoqi@0:     (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0)
aoqi@0:     ||
aoqi@0:     // Read loacation of signature
aoqi@0:     (sizeof(signature_offset)!=
aoqi@0:       (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset))))
aoqi@0:     ||
aoqi@0:     //Go to COFF File Header in dll
aoqi@0:     //that is located after"signature" (4 bytes long)
aoqi@0:     (os::seek_to_file_offset(file_descriptor,
aoqi@0:       signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0)
aoqi@0:     ||
aoqi@0:     //Read field that contains code of architecture
aoqi@0:     // that dll was build for
aoqi@0:     (sizeof(lib_arch)!=
aoqi@0:       (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch))))
aoqi@0:   );
aoqi@0: 
aoqi@0:   ::close(file_descriptor);
aoqi@0:   if (failed_to_get_lib_arch)
aoqi@0:   {
aoqi@0:     // file i/o error - report os::lasterror(...) msg
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   typedef struct
aoqi@0:   {
aoqi@0:     uint16_t arch_code;
aoqi@0:     char* arch_name;
aoqi@0:   } arch_t;
aoqi@0: 
aoqi@0:   static const arch_t arch_array[]={
aoqi@0:     {IMAGE_FILE_MACHINE_I386,      (char*)"IA 32"},
aoqi@0:     {IMAGE_FILE_MACHINE_AMD64,     (char*)"AMD 64"},
aoqi@0:     {IMAGE_FILE_MACHINE_IA64,      (char*)"IA 64"}
aoqi@0:   };
aoqi@0:   #if   (defined _M_IA64)
aoqi@0:     static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64;
aoqi@0:   #elif (defined _M_AMD64)
aoqi@0:     static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64;
aoqi@0:   #elif (defined _M_IX86)
aoqi@0:     static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386;
aoqi@0:   #else
aoqi@0:     #error Method os::dll_load requires that one of following \
aoqi@0:            is defined :_M_IA64,_M_AMD64 or _M_IX86
aoqi@0:   #endif
aoqi@0: 
aoqi@0: 
aoqi@0:   // Obtain a string for printf operation
aoqi@0:   // lib_arch_str shall contain string what platform this .dll was built for
aoqi@0:   // running_arch_str shall string contain what platform Hotspot was built for
aoqi@0:   char *running_arch_str=NULL,*lib_arch_str=NULL;
aoqi@0:   for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++)
aoqi@0:   {
aoqi@0:     if (lib_arch==arch_array[i].arch_code)
aoqi@0:       lib_arch_str=arch_array[i].arch_name;
aoqi@0:     if (running_arch==arch_array[i].arch_code)
aoqi@0:       running_arch_str=arch_array[i].arch_name;
aoqi@0:   }
aoqi@0: 
aoqi@0:   assert(running_arch_str,
aoqi@0:     "Didn't find runing architecture code in arch_array");
aoqi@0: 
aoqi@0:   // If the architure is right
aoqi@0:   // but some other error took place - report os::lasterror(...) msg
aoqi@0:   if (lib_arch == running_arch)
aoqi@0:   {
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (lib_arch_str!=NULL)
aoqi@0:   {
aoqi@0:     ::_snprintf(ebuf, ebuflen-1,
aoqi@0:       "Can't load %s-bit .dll on a %s-bit platform",
aoqi@0:       lib_arch_str,running_arch_str);
aoqi@0:   }
aoqi@0:   else
aoqi@0:   {
aoqi@0:     // don't know what architecture this dll was build for
aoqi@0:     ::_snprintf(ebuf, ebuflen-1,
aoqi@0:       "Can't load this .dll (machine code=0x%x) on a %s-bit platform",
aoqi@0:       lib_arch,running_arch_str);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void os::print_dll_info(outputStream *st) {
aoqi@0:    int pid = os::current_process_id();
aoqi@0:    st->print_cr("Dynamic libraries:");
aoqi@0:    enumerate_modules(pid, _print_module, (void *)st);
aoqi@0: }
aoqi@0: 
aoqi@0: void os::print_os_info_brief(outputStream* st) {
aoqi@0:   os::print_os_info(st);
aoqi@0: }
aoqi@0: 
aoqi@0: void os::print_os_info(outputStream* st) {
aoqi@0:   st->print("OS:");
aoqi@0: 
aoqi@0:   os::win32::print_windows_version(st);
aoqi@0: }
aoqi@0: 
aoqi@0: void os::win32::print_windows_version(outputStream* st) {
aoqi@0:   OSVERSIONINFOEX osvi;
aoqi@0:   SYSTEM_INFO si;
aoqi@0: 
aoqi@0:   ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
aoqi@0:   osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
aoqi@0: 
aoqi@0:   if (!GetVersionEx((OSVERSIONINFO *)&osvi)) {
aoqi@0:     st->print_cr("N/A");
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion;
aoqi@0: 
aoqi@0:   ZeroMemory(&si, sizeof(SYSTEM_INFO));
aoqi@0:   if (os_vers >= 5002) {
aoqi@0:     // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could
aoqi@0:     // find out whether we are running on 64 bit processor or not.
aoqi@0:     if (os::Kernel32Dll::GetNativeSystemInfoAvailable()) {
aoqi@0:       os::Kernel32Dll::GetNativeSystemInfo(&si);
aoqi@0:     } else {
aoqi@0:       GetSystemInfo(&si);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
aoqi@0:     switch (os_vers) {
aoqi@0:     case 3051: st->print(" Windows NT 3.51"); break;
aoqi@0:     case 4000: st->print(" Windows NT 4.0"); break;
aoqi@0:     case 5000: st->print(" Windows 2000"); break;
aoqi@0:     case 5001: st->print(" Windows XP"); break;
aoqi@0:     case 5002:
aoqi@0:       if (osvi.wProductType == VER_NT_WORKSTATION &&
aoqi@0:           si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) {
aoqi@0:         st->print(" Windows XP x64 Edition");
aoqi@0:       } else {
aoqi@0:         st->print(" Windows Server 2003 family");
aoqi@0:       }
aoqi@0:       break;
aoqi@0: 
aoqi@0:     case 6000:
aoqi@0:       if (osvi.wProductType == VER_NT_WORKSTATION) {
aoqi@0:         st->print(" Windows Vista");
aoqi@0:       } else {
aoqi@0:         st->print(" Windows Server 2008");
aoqi@0:       }
aoqi@0:       break;
aoqi@0: 
aoqi@0:     case 6001:
aoqi@0:       if (osvi.wProductType == VER_NT_WORKSTATION) {
aoqi@0:         st->print(" Windows 7");
aoqi@0:       } else {
aoqi@0:         st->print(" Windows Server 2008 R2");
aoqi@0:       }
aoqi@0:       break;
aoqi@0: 
aoqi@0:     case 6002:
aoqi@0:       if (osvi.wProductType == VER_NT_WORKSTATION) {
aoqi@0:         st->print(" Windows 8");
aoqi@0:       } else {
aoqi@0:         st->print(" Windows Server 2012");
aoqi@0:       }
aoqi@0:       break;
aoqi@0: 
aoqi@0:     case 6003:
aoqi@0:       if (osvi.wProductType == VER_NT_WORKSTATION) {
aoqi@0:         st->print(" Windows 8.1");
aoqi@0:       } else {
aoqi@0:         st->print(" Windows Server 2012 R2");
aoqi@0:       }
aoqi@0:       break;
aoqi@0: 
aoqi@0:     default: // future os
aoqi@0:       // Unrecognized windows, print out its major and minor versions
aoqi@0:       st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     switch (os_vers) {
aoqi@0:     case 4000: st->print(" Windows 95"); break;
aoqi@0:     case 4010: st->print(" Windows 98"); break;
aoqi@0:     case 4090: st->print(" Windows Me"); break;
aoqi@0:     default: // future windows, print out its major and minor versions
aoqi@0:       st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (os_vers >= 6000 && si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) {
aoqi@0:     st->print(" , 64 bit");
aoqi@0:   }
aoqi@0: 
aoqi@0:   st->print(" Build %d", osvi.dwBuildNumber);
aoqi@0:   st->print(" %s", osvi.szCSDVersion);           // service pack
aoqi@0:   st->cr();
aoqi@0: }
aoqi@0: 
aoqi@0: void os::pd_print_cpu_info(outputStream* st) {
aoqi@0:   // Nothing to do for now.
aoqi@0: }
aoqi@0: 
aoqi@0: void os::print_memory_info(outputStream* st) {
aoqi@0:   st->print("Memory:");
aoqi@0:   st->print(" %dk page", os::vm_page_size()>>10);
aoqi@0: 
aoqi@0:   // Use GlobalMemoryStatusEx() because GlobalMemoryStatus() may return incorrect
aoqi@0:   // value if total memory is larger than 4GB
aoqi@0:   MEMORYSTATUSEX ms;
aoqi@0:   ms.dwLength = sizeof(ms);
aoqi@0:   GlobalMemoryStatusEx(&ms);
aoqi@0: 
aoqi@0:   st->print(", physical %uk", os::physical_memory() >> 10);
aoqi@0:   st->print("(%uk free)", os::available_memory() >> 10);
aoqi@0: 
aoqi@0:   st->print(", swap %uk", ms.ullTotalPageFile >> 10);
aoqi@0:   st->print("(%uk free)", ms.ullAvailPageFile >> 10);
aoqi@0:   st->cr();
aoqi@0: }
aoqi@0: 
aoqi@0: void os::print_siginfo(outputStream *st, void *siginfo) {
aoqi@0:   EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo;
aoqi@0:   st->print("siginfo:");
aoqi@0:   st->print(" ExceptionCode=0x%x", er->ExceptionCode);
aoqi@0: 
aoqi@0:   if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
aoqi@0:       er->NumberParameters >= 2) {
aoqi@0:       switch (er->ExceptionInformation[0]) {
aoqi@0:       case 0: st->print(", reading address"); break;
aoqi@0:       case 1: st->print(", writing address"); break;
aoqi@0:       default: st->print(", ExceptionInformation=" INTPTR_FORMAT,
aoqi@0:                             er->ExceptionInformation[0]);
aoqi@0:       }
aoqi@0:       st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]);
aoqi@0:   } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR &&
aoqi@0:              er->NumberParameters >= 2 && UseSharedSpaces) {
aoqi@0:     FileMapInfo* mapinfo = FileMapInfo::current_info();
aoqi@0:     if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) {
aoqi@0:       st->print("\n\nError accessing class data sharing archive."       \
aoqi@0:                 " Mapped file inaccessible during execution, "          \
aoqi@0:                 " possible disk/network problem.");
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     int num = er->NumberParameters;
aoqi@0:     if (num > 0) {
aoqi@0:       st->print(", ExceptionInformation=");
aoqi@0:       for (int i = 0; i < num; i++) {
aoqi@0:         st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]);
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0:   st->cr();
aoqi@0: }
aoqi@0: 
aoqi@0: void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) {
aoqi@0:   // do nothing
aoqi@0: }
aoqi@0: 
aoqi@0: static char saved_jvm_path[MAX_PATH] = {0};
aoqi@0: 
aoqi@0: // Find the full path to the current module, jvm.dll
aoqi@0: void os::jvm_path(char *buf, jint buflen) {
aoqi@0:   // Error checking.
aoqi@0:   if (buflen < MAX_PATH) {
aoqi@0:     assert(false, "must use a large-enough buffer");
aoqi@0:     buf[0] = '\0';
aoqi@0:     return;
aoqi@0:   }
aoqi@0:   // Lazy resolve the path to current module.
aoqi@0:   if (saved_jvm_path[0] != 0) {
aoqi@0:     strcpy(buf, saved_jvm_path);
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   buf[0] = '\0';
aoqi@0:   if (Arguments::created_by_gamma_launcher()) {
aoqi@0:      // Support for the gamma launcher. Check for an
aoqi@0:      // JAVA_HOME environment variable
aoqi@0:      // and fix up the path so it looks like
aoqi@0:      // libjvm.so is installed there (append a fake suffix
aoqi@0:      // hotspot/libjvm.so).
aoqi@0:      char* java_home_var = ::getenv("JAVA_HOME");
aoqi@0:      if (java_home_var != NULL && java_home_var[0] != 0 &&
aoqi@0:          strlen(java_home_var) < (size_t)buflen) {
aoqi@0: 
aoqi@0:         strncpy(buf, java_home_var, buflen);
aoqi@0: 
aoqi@0:         // determine if this is a legacy image or modules image
aoqi@0:         // modules image doesn't have "jre" subdirectory
aoqi@0:         size_t len = strlen(buf);
aoqi@0:         char* jrebin_p = buf + len;
aoqi@0:         jio_snprintf(jrebin_p, buflen-len, "\\jre\\bin\\");
aoqi@0:         if (0 != _access(buf, 0)) {
aoqi@0:           jio_snprintf(jrebin_p, buflen-len, "\\bin\\");
aoqi@0:         }
aoqi@0:         len = strlen(buf);
aoqi@0:         jio_snprintf(buf + len, buflen-len, "hotspot\\jvm.dll");
aoqi@0:      }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if(buf[0] == '\0') {
aoqi@0:     GetModuleFileName(vm_lib_handle, buf, buflen);
aoqi@0:   }
aoqi@0:   strncpy(saved_jvm_path, buf, MAX_PATH);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void os::print_jni_name_prefix_on(outputStream* st, int args_size) {
aoqi@0: #ifndef _WIN64
aoqi@0:   st->print("_");
aoqi@0: #endif
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void os::print_jni_name_suffix_on(outputStream* st, int args_size) {
aoqi@0: #ifndef _WIN64
aoqi@0:   st->print("@%d", args_size  * sizeof(int));
aoqi@0: #endif
aoqi@0: }
aoqi@0: 
aoqi@0: // This method is a copy of JDK's sysGetLastErrorString
aoqi@0: // from src/windows/hpi/src/system_md.c
aoqi@0: 
aoqi@0: size_t os::lasterror(char* buf, size_t len) {
aoqi@0:   DWORD errval;
aoqi@0: 
aoqi@0:   if ((errval = GetLastError()) != 0) {
aoqi@0:     // DOS error
aoqi@0:     size_t n = (size_t)FormatMessage(
aoqi@0:           FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,
aoqi@0:           NULL,
aoqi@0:           errval,
aoqi@0:           0,
aoqi@0:           buf,
aoqi@0:           (DWORD)len,
aoqi@0:           NULL);
aoqi@0:     if (n > 3) {
aoqi@0:       // Drop final '.', CR, LF
aoqi@0:       if (buf[n - 1] == '\n') n--;
aoqi@0:       if (buf[n - 1] == '\r') n--;
aoqi@0:       if (buf[n - 1] == '.') n--;
aoqi@0:       buf[n] = '\0';
aoqi@0:     }
aoqi@0:     return n;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (errno != 0) {
aoqi@0:     // C runtime error that has no corresponding DOS error code
aoqi@0:     const char* s = strerror(errno);
aoqi@0:     size_t n = strlen(s);
aoqi@0:     if (n >= len) n = len - 1;
aoqi@0:     strncpy(buf, s, n);
aoqi@0:     buf[n] = '\0';
aoqi@0:     return n;
aoqi@0:   }
aoqi@0: 
aoqi@0:   return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: int os::get_last_error() {
aoqi@0:   DWORD error = GetLastError();
aoqi@0:   if (error == 0)
aoqi@0:     error = errno;
aoqi@0:   return (int)error;
aoqi@0: }
aoqi@0: 
aoqi@0: // sun.misc.Signal
aoqi@0: // NOTE that this is a workaround for an apparent kernel bug where if
aoqi@0: // a signal handler for SIGBREAK is installed then that signal handler
aoqi@0: // takes priority over the console control handler for CTRL_CLOSE_EVENT.
aoqi@0: // See bug 4416763.
aoqi@0: static void (*sigbreakHandler)(int) = NULL;
aoqi@0: 
aoqi@0: static void UserHandler(int sig, void *siginfo, void *context) {
aoqi@0:   os::signal_notify(sig);
aoqi@0:   // We need to reinstate the signal handler each time...
aoqi@0:   os::signal(sig, (void*)UserHandler);
aoqi@0: }
aoqi@0: 
aoqi@0: void* os::user_handler() {
aoqi@0:   return (void*) UserHandler;
aoqi@0: }
aoqi@0: 
aoqi@0: void* os::signal(int signal_number, void* handler) {
aoqi@0:   if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) {
aoqi@0:     void (*oldHandler)(int) = sigbreakHandler;
aoqi@0:     sigbreakHandler = (void (*)(int)) handler;
aoqi@0:     return (void*) oldHandler;
aoqi@0:   } else {
aoqi@0:     return (void*)::signal(signal_number, (void (*)(int))handler);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::signal_raise(int signal_number) {
aoqi@0:   raise(signal_number);
aoqi@0: }
aoqi@0: 
aoqi@0: // The Win32 C runtime library maps all console control events other than ^C
aoqi@0: // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close,
aoqi@0: // logoff, and shutdown events.  We therefore install our own console handler
aoqi@0: // that raises SIGTERM for the latter cases.
aoqi@0: //
aoqi@0: static BOOL WINAPI consoleHandler(DWORD event) {
aoqi@0:   switch(event) {
aoqi@0:     case CTRL_C_EVENT:
aoqi@0:       if (is_error_reported()) {
aoqi@0:         // Ctrl-C is pressed during error reporting, likely because the error
aoqi@0:         // handler fails to abort. Let VM die immediately.
aoqi@0:         os::die();
aoqi@0:       }
aoqi@0: 
aoqi@0:       os::signal_raise(SIGINT);
aoqi@0:       return TRUE;
aoqi@0:       break;
aoqi@0:     case CTRL_BREAK_EVENT:
aoqi@0:       if (sigbreakHandler != NULL) {
aoqi@0:         (*sigbreakHandler)(SIGBREAK);
aoqi@0:       }
aoqi@0:       return TRUE;
aoqi@0:       break;
aoqi@0:     case CTRL_LOGOFF_EVENT: {
aoqi@0:       // Don't terminate JVM if it is running in a non-interactive session,
aoqi@0:       // such as a service process.
aoqi@0:       USEROBJECTFLAGS flags;
aoqi@0:       HANDLE handle = GetProcessWindowStation();
aoqi@0:       if (handle != NULL &&
aoqi@0:           GetUserObjectInformation(handle, UOI_FLAGS, &flags,
aoqi@0:             sizeof( USEROBJECTFLAGS), NULL)) {
aoqi@0:         // If it is a non-interactive session, let next handler to deal
aoqi@0:         // with it.
aoqi@0:         if ((flags.dwFlags & WSF_VISIBLE) == 0) {
aoqi@0:           return FALSE;
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:     case CTRL_CLOSE_EVENT:
aoqi@0:     case CTRL_SHUTDOWN_EVENT:
aoqi@0:       os::signal_raise(SIGTERM);
aoqi@0:       return TRUE;
aoqi@0:       break;
aoqi@0:     default:
aoqi@0:       break;
aoqi@0:   }
aoqi@0:   return FALSE;
aoqi@0: }
aoqi@0: 
aoqi@0: /*
aoqi@0:  * The following code is moved from os.cpp for making this
aoqi@0:  * code platform specific, which it is by its very nature.
aoqi@0:  */
aoqi@0: 
aoqi@0: // Return maximum OS signal used + 1 for internal use only
aoqi@0: // Used as exit signal for signal_thread
aoqi@0: int os::sigexitnum_pd(){
aoqi@0:   return NSIG;
aoqi@0: }
aoqi@0: 
aoqi@0: // a counter for each possible signal value, including signal_thread exit signal
aoqi@0: static volatile jint pending_signals[NSIG+1] = { 0 };
aoqi@0: static HANDLE sig_sem = NULL;
aoqi@0: 
aoqi@0: void os::signal_init_pd() {
aoqi@0:   // Initialize signal structures
aoqi@0:   memset((void*)pending_signals, 0, sizeof(pending_signals));
aoqi@0: 
aoqi@0:   sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL);
aoqi@0: 
aoqi@0:   // Programs embedding the VM do not want it to attempt to receive
aoqi@0:   // events like CTRL_LOGOFF_EVENT, which are used to implement the
aoqi@0:   // shutdown hooks mechanism introduced in 1.3.  For example, when
aoqi@0:   // the VM is run as part of a Windows NT service (i.e., a servlet
aoqi@0:   // engine in a web server), the correct behavior is for any console
aoqi@0:   // control handler to return FALSE, not TRUE, because the OS's
aoqi@0:   // "final" handler for such events allows the process to continue if
aoqi@0:   // it is a service (while terminating it if it is not a service).
aoqi@0:   // To make this behavior uniform and the mechanism simpler, we
aoqi@0:   // completely disable the VM's usage of these console events if -Xrs
aoqi@0:   // (=ReduceSignalUsage) is specified.  This means, for example, that
aoqi@0:   // the CTRL-BREAK thread dump mechanism is also disabled in this
aoqi@0:   // case.  See bugs 4323062, 4345157, and related bugs.
aoqi@0: 
aoqi@0:   if (!ReduceSignalUsage) {
aoqi@0:     // Add a CTRL-C handler
aoqi@0:     SetConsoleCtrlHandler(consoleHandler, TRUE);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::signal_notify(int signal_number) {
aoqi@0:   BOOL ret;
aoqi@0:   if (sig_sem != NULL) {
aoqi@0:     Atomic::inc(&pending_signals[signal_number]);
aoqi@0:     ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
aoqi@0:     assert(ret != 0, "ReleaseSemaphore() failed");
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: static int check_pending_signals(bool wait_for_signal) {
aoqi@0:   DWORD ret;
aoqi@0:   while (true) {
aoqi@0:     for (int i = 0; i < NSIG + 1; i++) {
aoqi@0:       jint n = pending_signals[i];
aoqi@0:       if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) {
aoqi@0:         return i;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     if (!wait_for_signal) {
aoqi@0:       return -1;
aoqi@0:     }
aoqi@0: 
aoqi@0:     JavaThread *thread = JavaThread::current();
aoqi@0: 
aoqi@0:     ThreadBlockInVM tbivm(thread);
aoqi@0: 
aoqi@0:     bool threadIsSuspended;
aoqi@0:     do {
aoqi@0:       thread->set_suspend_equivalent();
aoqi@0:       // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self()
aoqi@0:       ret = ::WaitForSingleObject(sig_sem, INFINITE);
aoqi@0:       assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed");
aoqi@0: 
aoqi@0:       // were we externally suspended while we were waiting?
aoqi@0:       threadIsSuspended = thread->handle_special_suspend_equivalent_condition();
aoqi@0:       if (threadIsSuspended) {
aoqi@0:         //
aoqi@0:         // The semaphore has been incremented, but while we were waiting
aoqi@0:         // another thread suspended us. We don't want to continue running
aoqi@0:         // while suspended because that would surprise the thread that
aoqi@0:         // suspended us.
aoqi@0:         //
aoqi@0:         ret = ::ReleaseSemaphore(sig_sem, 1, NULL);
aoqi@0:         assert(ret != 0, "ReleaseSemaphore() failed");
aoqi@0: 
aoqi@0:         thread->java_suspend_self();
aoqi@0:       }
aoqi@0:     } while (threadIsSuspended);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: int os::signal_lookup() {
aoqi@0:   return check_pending_signals(false);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::signal_wait() {
aoqi@0:   return check_pending_signals(true);
aoqi@0: }
aoqi@0: 
aoqi@0: // Implicit OS exception handling
aoqi@0: 
aoqi@0: LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) {
aoqi@0:   JavaThread* thread = JavaThread::current();
aoqi@0:   // Save pc in thread
aoqi@0: #ifdef _M_IA64
aoqi@0:   // Do not blow up if no thread info available.
aoqi@0:   if (thread) {
aoqi@0:     // Saving PRECISE pc (with slot information) in thread.
aoqi@0:     uint64_t precise_pc = (uint64_t) exceptionInfo->ExceptionRecord->ExceptionAddress;
aoqi@0:     // Convert precise PC into "Unix" format
aoqi@0:     precise_pc = (precise_pc & 0xFFFFFFFFFFFFFFF0) | ((precise_pc & 0xF) >> 2);
aoqi@0:     thread->set_saved_exception_pc((address)precise_pc);
aoqi@0:   }
aoqi@0:   // Set pc to handler
aoqi@0:   exceptionInfo->ContextRecord->StIIP = (DWORD64)handler;
aoqi@0:   // Clear out psr.ri (= Restart Instruction) in order to continue
aoqi@0:   // at the beginning of the target bundle.
aoqi@0:   exceptionInfo->ContextRecord->StIPSR &= 0xFFFFF9FFFFFFFFFF;
aoqi@0:   assert(((DWORD64)handler & 0xF) == 0, "Target address must point to the beginning of a bundle!");
aoqi@0: #elif _M_AMD64
aoqi@0:   // Do not blow up if no thread info available.
aoqi@0:   if (thread) {
aoqi@0:     thread->set_saved_exception_pc((address)(DWORD_PTR)exceptionInfo->ContextRecord->Rip);
aoqi@0:   }
aoqi@0:   // Set pc to handler
aoqi@0:   exceptionInfo->ContextRecord->Rip = (DWORD64)handler;
aoqi@0: #else
aoqi@0:   // Do not blow up if no thread info available.
aoqi@0:   if (thread) {
aoqi@0:     thread->set_saved_exception_pc((address)(DWORD_PTR)exceptionInfo->ContextRecord->Eip);
aoqi@0:   }
aoqi@0:   // Set pc to handler
aoqi@0:   exceptionInfo->ContextRecord->Eip = (DWORD)(DWORD_PTR)handler;
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // Continue the execution
aoqi@0:   return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Used for PostMortemDump
aoqi@0: extern "C" void safepoints();
aoqi@0: extern "C" void find(int x);
aoqi@0: extern "C" void events();
aoqi@0: 
aoqi@0: // According to Windows API documentation, an illegal instruction sequence should generate
aoqi@0: // the 0xC000001C exception code. However, real world experience shows that occasionnaly
aoqi@0: // the execution of an illegal instruction can generate the exception code 0xC000001E. This
aoqi@0: // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems).
aoqi@0: 
aoqi@0: #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E
aoqi@0: 
aoqi@0: // From "Execution Protection in the Windows Operating System" draft 0.35
aoqi@0: // Once a system header becomes available, the "real" define should be
aoqi@0: // included or copied here.
aoqi@0: #define EXCEPTION_INFO_EXEC_VIOLATION 0x08
aoqi@0: 
aoqi@0: // Handle NAT Bit consumption on IA64.
aoqi@0: #ifdef _M_IA64
aoqi@0: #define EXCEPTION_REG_NAT_CONSUMPTION    STATUS_REG_NAT_CONSUMPTION
aoqi@0: #endif
aoqi@0: 
aoqi@0: // Windows Vista/2008 heap corruption check
aoqi@0: #define EXCEPTION_HEAP_CORRUPTION        0xC0000374
aoqi@0: 
aoqi@0: #define def_excpt(val) #val, val
aoqi@0: 
aoqi@0: struct siglabel {
aoqi@0:   char *name;
aoqi@0:   int   number;
aoqi@0: };
aoqi@0: 
aoqi@0: // All Visual C++ exceptions thrown from code generated by the Microsoft Visual
aoqi@0: // C++ compiler contain this error code. Because this is a compiler-generated
aoqi@0: // error, the code is not listed in the Win32 API header files.
aoqi@0: // The code is actually a cryptic mnemonic device, with the initial "E"
aoqi@0: // standing for "exception" and the final 3 bytes (0x6D7363) representing the
aoqi@0: // ASCII values of "msc".
aoqi@0: 
aoqi@0: #define EXCEPTION_UNCAUGHT_CXX_EXCEPTION    0xE06D7363
aoqi@0: 
aoqi@0: 
aoqi@0: struct siglabel exceptlabels[] = {
aoqi@0:     def_excpt(EXCEPTION_ACCESS_VIOLATION),
aoqi@0:     def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
aoqi@0:     def_excpt(EXCEPTION_BREAKPOINT),
aoqi@0:     def_excpt(EXCEPTION_SINGLE_STEP),
aoqi@0:     def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED),
aoqi@0:     def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND),
aoqi@0:     def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO),
aoqi@0:     def_excpt(EXCEPTION_FLT_INEXACT_RESULT),
aoqi@0:     def_excpt(EXCEPTION_FLT_INVALID_OPERATION),
aoqi@0:     def_excpt(EXCEPTION_FLT_OVERFLOW),
aoqi@0:     def_excpt(EXCEPTION_FLT_STACK_CHECK),
aoqi@0:     def_excpt(EXCEPTION_FLT_UNDERFLOW),
aoqi@0:     def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO),
aoqi@0:     def_excpt(EXCEPTION_INT_OVERFLOW),
aoqi@0:     def_excpt(EXCEPTION_PRIV_INSTRUCTION),
aoqi@0:     def_excpt(EXCEPTION_IN_PAGE_ERROR),
aoqi@0:     def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION),
aoqi@0:     def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2),
aoqi@0:     def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION),
aoqi@0:     def_excpt(EXCEPTION_STACK_OVERFLOW),
aoqi@0:     def_excpt(EXCEPTION_INVALID_DISPOSITION),
aoqi@0:     def_excpt(EXCEPTION_GUARD_PAGE),
aoqi@0:     def_excpt(EXCEPTION_INVALID_HANDLE),
aoqi@0:     def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION),
aoqi@0:     def_excpt(EXCEPTION_HEAP_CORRUPTION),
aoqi@0: #ifdef _M_IA64
aoqi@0:     def_excpt(EXCEPTION_REG_NAT_CONSUMPTION),
aoqi@0: #endif
aoqi@0:     NULL, 0
aoqi@0: };
aoqi@0: 
aoqi@0: const char* os::exception_name(int exception_code, char *buf, size_t size) {
aoqi@0:   for (int i = 0; exceptlabels[i].name != NULL; i++) {
aoqi@0:     if (exceptlabels[i].number == exception_code) {
aoqi@0:        jio_snprintf(buf, size, "%s", exceptlabels[i].name);
aoqi@0:        return buf;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------------------------------------------------------
aoqi@0: LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
aoqi@0:   // handle exception caused by idiv; should only happen for -MinInt/-1
aoqi@0:   // (division by zero is handled explicitly)
aoqi@0: #ifdef _M_IA64
aoqi@0:   assert(0, "Fix Handle_IDiv_Exception");
aoqi@0: #elif _M_AMD64
aoqi@0:   PCONTEXT ctx = exceptionInfo->ContextRecord;
aoqi@0:   address pc = (address)ctx->Rip;
aoqi@0:   assert(pc[0] == 0xF7, "not an idiv opcode");
aoqi@0:   assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
aoqi@0:   assert(ctx->Rax == min_jint, "unexpected idiv exception");
aoqi@0:   // set correct result values and continue after idiv instruction
aoqi@0:   ctx->Rip = (DWORD)pc + 2;        // idiv reg, reg  is 2 bytes
aoqi@0:   ctx->Rax = (DWORD)min_jint;      // result
aoqi@0:   ctx->Rdx = (DWORD)0;             // remainder
aoqi@0:   // Continue the execution
aoqi@0: #else
aoqi@0:   PCONTEXT ctx = exceptionInfo->ContextRecord;
aoqi@0:   address pc = (address)ctx->Eip;
aoqi@0:   assert(pc[0] == 0xF7, "not an idiv opcode");
aoqi@0:   assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
aoqi@0:   assert(ctx->Eax == min_jint, "unexpected idiv exception");
aoqi@0:   // set correct result values and continue after idiv instruction
aoqi@0:   ctx->Eip = (DWORD)pc + 2;        // idiv reg, reg  is 2 bytes
aoqi@0:   ctx->Eax = (DWORD)min_jint;      // result
aoqi@0:   ctx->Edx = (DWORD)0;             // remainder
aoqi@0:   // Continue the execution
aoqi@0: #endif
aoqi@0:   return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0: }
aoqi@0: 
aoqi@0: #ifndef  _WIN64
aoqi@0: //-----------------------------------------------------------------------------
aoqi@0: LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) {
aoqi@0:   // handle exception caused by native method modifying control word
aoqi@0:   PCONTEXT ctx = exceptionInfo->ContextRecord;
aoqi@0:   DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
aoqi@0: 
aoqi@0:   switch (exception_code) {
aoqi@0:     case EXCEPTION_FLT_DENORMAL_OPERAND:
aoqi@0:     case EXCEPTION_FLT_DIVIDE_BY_ZERO:
aoqi@0:     case EXCEPTION_FLT_INEXACT_RESULT:
aoqi@0:     case EXCEPTION_FLT_INVALID_OPERATION:
aoqi@0:     case EXCEPTION_FLT_OVERFLOW:
aoqi@0:     case EXCEPTION_FLT_STACK_CHECK:
aoqi@0:     case EXCEPTION_FLT_UNDERFLOW:
aoqi@0:       jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std());
aoqi@0:       if (fp_control_word != ctx->FloatSave.ControlWord) {
aoqi@0:         // Restore FPCW and mask out FLT exceptions
aoqi@0:         ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0;
aoqi@0:         // Mask out pending FLT exceptions
aoqi@0:         ctx->FloatSave.StatusWord &=  0xffffff00;
aoqi@0:         return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:       }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (prev_uef_handler != NULL) {
aoqi@0:     // We didn't handle this exception so pass it to the previous
aoqi@0:     // UnhandledExceptionFilter.
aoqi@0:     return (prev_uef_handler)(exceptionInfo);
aoqi@0:   }
aoqi@0: 
aoqi@0:   return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: }
aoqi@0: #else //_WIN64
aoqi@0: /*
aoqi@0:   On Windows, the mxcsr control bits are non-volatile across calls
aoqi@0:   See also CR 6192333
aoqi@0:   If EXCEPTION_FLT_* happened after some native method modified
aoqi@0:   mxcsr - it is not a jvm fault.
aoqi@0:   However should we decide to restore of mxcsr after a faulty
aoqi@0:   native method we can uncomment following code
aoqi@0:       jint MxCsr = INITIAL_MXCSR;
aoqi@0:         // we can't use StubRoutines::addr_mxcsr_std()
aoqi@0:         // because in Win64 mxcsr is not saved there
aoqi@0:       if (MxCsr != ctx->MxCsr) {
aoqi@0:         ctx->MxCsr = MxCsr;
aoqi@0:         return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:       }
aoqi@0: 
aoqi@0: */
aoqi@0: #endif // _WIN64
aoqi@0: 
aoqi@0: 
aoqi@0: static inline void report_error(Thread* t, DWORD exception_code,
aoqi@0:                                 address addr, void* siginfo, void* context) {
aoqi@0:   VMError err(t, exception_code, addr, siginfo, context);
aoqi@0:   err.report_and_die();
aoqi@0: 
aoqi@0:   // If UseOsErrorReporting, this will return here and save the error file
aoqi@0:   // somewhere where we can find it in the minidump.
aoqi@0: }
aoqi@0: 
aoqi@0: //-----------------------------------------------------------------------------
aoqi@0: LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
aoqi@0:   if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH;
aoqi@0:   DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
aoqi@0: #ifdef _M_IA64
aoqi@0:   // On Itanium, we need the "precise pc", which has the slot number coded
aoqi@0:   // into the least 4 bits: 0000=slot0, 0100=slot1, 1000=slot2 (Windows format).
aoqi@0:   address pc = (address) exceptionInfo->ExceptionRecord->ExceptionAddress;
aoqi@0:   // Convert the pc to "Unix format", which has the slot number coded
aoqi@0:   // into the least 2 bits: 0000=slot0, 0001=slot1, 0010=slot2
aoqi@0:   // This is needed for IA64 because "relocation" / "implicit null check" / "poll instruction"
aoqi@0:   // information is saved in the Unix format.
aoqi@0:   address pc_unix_format = (address) ((((uint64_t)pc) & 0xFFFFFFFFFFFFFFF0) | ((((uint64_t)pc) & 0xF) >> 2));
aoqi@0: #elif _M_AMD64
aoqi@0:   address pc = (address) exceptionInfo->ContextRecord->Rip;
aoqi@0: #else
aoqi@0:   address pc = (address) exceptionInfo->ContextRecord->Eip;
aoqi@0: #endif
aoqi@0:   Thread* t = ThreadLocalStorage::get_thread_slow();          // slow & steady
aoqi@0: 
aoqi@0:   // Handle SafeFetch32 and SafeFetchN exceptions.
aoqi@0:   if (StubRoutines::is_safefetch_fault(pc)) {
aoqi@0:     return Handle_Exception(exceptionInfo, StubRoutines::continuation_for_safefetch_fault(pc));
aoqi@0:   }
aoqi@0: 
aoqi@0: #ifndef _WIN64
aoqi@0:   // Execution protection violation - win32 running on AMD64 only
aoqi@0:   // Handled first to avoid misdiagnosis as a "normal" access violation;
aoqi@0:   // This is safe to do because we have a new/unique ExceptionInformation
aoqi@0:   // code for this condition.
aoqi@0:   if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
aoqi@0:     PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
aoqi@0:     int exception_subcode = (int) exceptionRecord->ExceptionInformation[0];
aoqi@0:     address addr = (address) exceptionRecord->ExceptionInformation[1];
aoqi@0: 
aoqi@0:     if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) {
aoqi@0:       int page_size = os::vm_page_size();
aoqi@0: 
aoqi@0:       // Make sure the pc and the faulting address are sane.
aoqi@0:       //
aoqi@0:       // If an instruction spans a page boundary, and the page containing
aoqi@0:       // the beginning of the instruction is executable but the following
aoqi@0:       // page is not, the pc and the faulting address might be slightly
aoqi@0:       // different - we still want to unguard the 2nd page in this case.
aoqi@0:       //
aoqi@0:       // 15 bytes seems to be a (very) safe value for max instruction size.
aoqi@0:       bool pc_is_near_addr =
aoqi@0:         (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
aoqi@0:       bool instr_spans_page_boundary =
aoqi@0:         (align_size_down((intptr_t) pc ^ (intptr_t) addr,
aoqi@0:                          (intptr_t) page_size) > 0);
aoqi@0: 
aoqi@0:       if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
aoqi@0:         static volatile address last_addr =
aoqi@0:           (address) os::non_memory_address_word();
aoqi@0: 
aoqi@0:         // In conservative mode, don't unguard unless the address is in the VM
aoqi@0:         if (UnguardOnExecutionViolation > 0 && addr != last_addr &&
aoqi@0:             (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
aoqi@0: 
aoqi@0:           // Set memory to RWX and retry
aoqi@0:           address page_start =
aoqi@0:             (address) align_size_down((intptr_t) addr, (intptr_t) page_size);
aoqi@0:           bool res = os::protect_memory((char*) page_start, page_size,
aoqi@0:                                         os::MEM_PROT_RWX);
aoqi@0: 
aoqi@0:           if (PrintMiscellaneous && Verbose) {
aoqi@0:             char buf[256];
aoqi@0:             jio_snprintf(buf, sizeof(buf), "Execution protection violation "
aoqi@0:                          "at " INTPTR_FORMAT
aoqi@0:                          ", unguarding " INTPTR_FORMAT ": %s", addr,
aoqi@0:                          page_start, (res ? "success" : strerror(errno)));
aoqi@0:             tty->print_raw_cr(buf);
aoqi@0:           }
aoqi@0: 
aoqi@0:           // Set last_addr so if we fault again at the same address, we don't
aoqi@0:           // end up in an endless loop.
aoqi@0:           //
aoqi@0:           // There are two potential complications here.  Two threads trapping
aoqi@0:           // at the same address at the same time could cause one of the
aoqi@0:           // threads to think it already unguarded, and abort the VM.  Likely
aoqi@0:           // very rare.
aoqi@0:           //
aoqi@0:           // The other race involves two threads alternately trapping at
aoqi@0:           // different addresses and failing to unguard the page, resulting in
aoqi@0:           // an endless loop.  This condition is probably even more unlikely
aoqi@0:           // than the first.
aoqi@0:           //
aoqi@0:           // Although both cases could be avoided by using locks or thread
aoqi@0:           // local last_addr, these solutions are unnecessary complication:
aoqi@0:           // this handler is a best-effort safety net, not a complete solution.
aoqi@0:           // It is disabled by default and should only be used as a workaround
aoqi@0:           // in case we missed any no-execute-unsafe VM code.
aoqi@0: 
aoqi@0:           last_addr = addr;
aoqi@0: 
aoqi@0:           return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:         }
aoqi@0:       }
aoqi@0: 
aoqi@0:       // Last unguard failed or not unguarding
aoqi@0:       tty->print_raw_cr("Execution protection violation");
aoqi@0:       report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord,
aoqi@0:                    exceptionInfo->ContextRecord);
aoqi@0:       return EXCEPTION_CONTINUE_SEARCH;
aoqi@0:     }
aoqi@0:   }
aoqi@0: #endif // _WIN64
aoqi@0: 
aoqi@0:   // Check to see if we caught the safepoint code in the
aoqi@0:   // process of write protecting the memory serialization page.
aoqi@0:   // It write enables the page immediately after protecting it
aoqi@0:   // so just return.
aoqi@0:   if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
aoqi@0:     JavaThread* thread = (JavaThread*) t;
aoqi@0:     PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
aoqi@0:     address addr = (address) exceptionRecord->ExceptionInformation[1];
aoqi@0:     if ( os::is_memory_serialize_page(thread, addr) ) {
aoqi@0:       // Block current thread until the memory serialize page permission restored.
aoqi@0:       os::block_on_serialize_page_trap();
aoqi@0:       return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if ((exception_code == EXCEPTION_ACCESS_VIOLATION) &&
aoqi@0:       VM_Version::is_cpuinfo_segv_addr(pc)) {
aoqi@0:     // Verify that OS save/restore AVX registers.
aoqi@0:     return Handle_Exception(exceptionInfo, VM_Version::cpuinfo_cont_addr());
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (t != NULL && t->is_Java_thread()) {
aoqi@0:     JavaThread* thread = (JavaThread*) t;
aoqi@0:     bool in_java = thread->thread_state() == _thread_in_Java;
aoqi@0: 
aoqi@0:     // Handle potential stack overflows up front.
aoqi@0:     if (exception_code == EXCEPTION_STACK_OVERFLOW) {
aoqi@0:       if (os::uses_stack_guard_pages()) {
aoqi@0: #ifdef _M_IA64
aoqi@0:         // Use guard page for register stack.
aoqi@0:         PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
aoqi@0:         address addr = (address) exceptionRecord->ExceptionInformation[1];
aoqi@0:         // Check for a register stack overflow on Itanium
aoqi@0:         if (thread->addr_inside_register_stack_red_zone(addr)) {
aoqi@0:           // Fatal red zone violation happens if the Java program
aoqi@0:           // catches a StackOverflow error and does so much processing
aoqi@0:           // that it runs beyond the unprotected yellow guard zone. As
aoqi@0:           // a result, we are out of here.
aoqi@0:           fatal("ERROR: Unrecoverable stack overflow happened. JVM will exit.");
aoqi@0:         } else if(thread->addr_inside_register_stack(addr)) {
aoqi@0:           // Disable the yellow zone which sets the state that
aoqi@0:           // we've got a stack overflow problem.
aoqi@0:           if (thread->stack_yellow_zone_enabled()) {
aoqi@0:             thread->disable_stack_yellow_zone();
aoqi@0:           }
aoqi@0:           // Give us some room to process the exception.
aoqi@0:           thread->disable_register_stack_guard();
aoqi@0:           // Tracing with +Verbose.
aoqi@0:           if (Verbose) {
aoqi@0:             tty->print_cr("SOF Compiled Register Stack overflow at " INTPTR_FORMAT " (SIGSEGV)", pc);
aoqi@0:             tty->print_cr("Register Stack access at " INTPTR_FORMAT, addr);
aoqi@0:             tty->print_cr("Register Stack base " INTPTR_FORMAT, thread->register_stack_base());
aoqi@0:             tty->print_cr("Register Stack [" INTPTR_FORMAT "," INTPTR_FORMAT "]",
aoqi@0:                           thread->register_stack_base(),
aoqi@0:                           thread->register_stack_base() + thread->stack_size());
aoqi@0:           }
aoqi@0: 
aoqi@0:           // Reguard the permanent register stack red zone just to be sure.
aoqi@0:           // We saw Windows silently disabling this without telling us.
aoqi@0:           thread->enable_register_stack_red_zone();
aoqi@0: 
aoqi@0:           return Handle_Exception(exceptionInfo,
aoqi@0:             SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
aoqi@0:         }
aoqi@0: #endif
aoqi@0:         if (thread->stack_yellow_zone_enabled()) {
aoqi@0:           // Yellow zone violation.  The o/s has unprotected the first yellow
aoqi@0:           // zone page for us.  Note:  must call disable_stack_yellow_zone to
aoqi@0:           // update the enabled status, even if the zone contains only one page.
aoqi@0:           thread->disable_stack_yellow_zone();
aoqi@0:           // If not in java code, return and hope for the best.
aoqi@0:           return in_java ? Handle_Exception(exceptionInfo,
aoqi@0:             SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW))
aoqi@0:             :  EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:         } else {
aoqi@0:           // Fatal red zone violation.
aoqi@0:           thread->disable_stack_red_zone();
aoqi@0:           tty->print_raw_cr("An unrecoverable stack overflow has occurred.");
aoqi@0:           report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
aoqi@0:                        exceptionInfo->ContextRecord);
aoqi@0:           return EXCEPTION_CONTINUE_SEARCH;
aoqi@0:         }
aoqi@0:       } else if (in_java) {
aoqi@0:         // JVM-managed guard pages cannot be used on win95/98.  The o/s provides
aoqi@0:         // a one-time-only guard page, which it has released to us.  The next
aoqi@0:         // stack overflow on this thread will result in an ACCESS_VIOLATION.
aoqi@0:         return Handle_Exception(exceptionInfo,
aoqi@0:           SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
aoqi@0:       } else {
aoqi@0:         // Can only return and hope for the best.  Further stack growth will
aoqi@0:         // result in an ACCESS_VIOLATION.
aoqi@0:         return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:       }
aoqi@0:     } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
aoqi@0:       // Either stack overflow or null pointer exception.
aoqi@0:       if (in_java) {
aoqi@0:         PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
aoqi@0:         address addr = (address) exceptionRecord->ExceptionInformation[1];
aoqi@0:         address stack_end = thread->stack_base() - thread->stack_size();
aoqi@0:         if (addr < stack_end && addr >= stack_end - os::vm_page_size()) {
aoqi@0:           // Stack overflow.
aoqi@0:           assert(!os::uses_stack_guard_pages(),
aoqi@0:             "should be caught by red zone code above.");
aoqi@0:           return Handle_Exception(exceptionInfo,
aoqi@0:             SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW));
aoqi@0:         }
aoqi@0:         //
aoqi@0:         // Check for safepoint polling and implicit null
aoqi@0:         // We only expect null pointers in the stubs (vtable)
aoqi@0:         // the rest are checked explicitly now.
aoqi@0:         //
aoqi@0:         CodeBlob* cb = CodeCache::find_blob(pc);
aoqi@0:         if (cb != NULL) {
aoqi@0:           if (os::is_poll_address(addr)) {
aoqi@0:             address stub = SharedRuntime::get_poll_stub(pc);
aoqi@0:             return Handle_Exception(exceptionInfo, stub);
aoqi@0:           }
aoqi@0:         }
aoqi@0:         {
aoqi@0: #ifdef _WIN64
aoqi@0:           //
aoqi@0:           // If it's a legal stack address map the entire region in
aoqi@0:           //
aoqi@0:           PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord;
aoqi@0:           address addr = (address) exceptionRecord->ExceptionInformation[1];
aoqi@0:           if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
aoqi@0:                   addr = (address)((uintptr_t)addr &
aoqi@0:                          (~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
aoqi@0:                   os::commit_memory((char *)addr, thread->stack_base() - addr,
aoqi@0:                                     !ExecMem);
aoqi@0:                   return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:           }
aoqi@0:           else
aoqi@0: #endif
aoqi@0:           {
aoqi@0:             // Null pointer exception.
aoqi@0: #ifdef _M_IA64
aoqi@0:             // Process implicit null checks in compiled code. Note: Implicit null checks
aoqi@0:             // can happen even if "ImplicitNullChecks" is disabled, e.g. in vtable stubs.
aoqi@0:             if (CodeCache::contains((void*) pc_unix_format) && !MacroAssembler::needs_explicit_null_check((intptr_t) addr)) {
aoqi@0:               CodeBlob *cb = CodeCache::find_blob_unsafe(pc_unix_format);
aoqi@0:               // Handle implicit null check in UEP method entry
aoqi@0:               if (cb && (cb->is_frame_complete_at(pc) ||
aoqi@0:                          (cb->is_nmethod() && ((nmethod *)cb)->inlinecache_check_contains(pc)))) {
aoqi@0:                 if (Verbose) {
aoqi@0:                   intptr_t *bundle_start = (intptr_t*) ((intptr_t) pc_unix_format & 0xFFFFFFFFFFFFFFF0);
aoqi@0:                   tty->print_cr("trap: null_check at " INTPTR_FORMAT " (SIGSEGV)", pc_unix_format);
aoqi@0:                   tty->print_cr("      to addr " INTPTR_FORMAT, addr);
aoqi@0:                   tty->print_cr("      bundle is " INTPTR_FORMAT " (high), " INTPTR_FORMAT " (low)",
aoqi@0:                                 *(bundle_start + 1), *bundle_start);
aoqi@0:                 }
aoqi@0:                 return Handle_Exception(exceptionInfo,
aoqi@0:                   SharedRuntime::continuation_for_implicit_exception(thread, pc_unix_format, SharedRuntime::IMPLICIT_NULL));
aoqi@0:               }
aoqi@0:             }
aoqi@0: 
aoqi@0:             // Implicit null checks were processed above.  Hence, we should not reach
aoqi@0:             // here in the usual case => die!
aoqi@0:             if (Verbose) tty->print_raw_cr("Access violation, possible null pointer exception");
aoqi@0:             report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
aoqi@0:                          exceptionInfo->ContextRecord);
aoqi@0:             return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: 
aoqi@0: #else // !IA64
aoqi@0: 
aoqi@0:             // Windows 98 reports faulting addresses incorrectly
aoqi@0:             if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) ||
aoqi@0:                 !os::win32::is_nt()) {
aoqi@0:               address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
aoqi@0:               if (stub != NULL) return Handle_Exception(exceptionInfo, stub);
aoqi@0:             }
aoqi@0:             report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
aoqi@0:                          exceptionInfo->ContextRecord);
aoqi@0:             return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: #endif
aoqi@0:           }
aoqi@0:         }
aoqi@0:       }
aoqi@0: 
aoqi@0: #ifdef _WIN64
aoqi@0:       // Special care for fast JNI field accessors.
aoqi@0:       // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks
aoqi@0:       // in and the heap gets shrunk before the field access.
aoqi@0:       if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
aoqi@0:         address addr = JNI_FastGetField::find_slowcase_pc(pc);
aoqi@0:         if (addr != (address)-1) {
aoqi@0:           return Handle_Exception(exceptionInfo, addr);
aoqi@0:         }
aoqi@0:       }
aoqi@0: #endif
aoqi@0: 
aoqi@0:       // Stack overflow or null pointer exception in native code.
aoqi@0:       report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
aoqi@0:                    exceptionInfo->ContextRecord);
aoqi@0:       return EXCEPTION_CONTINUE_SEARCH;
aoqi@0:     } // /EXCEPTION_ACCESS_VIOLATION
aoqi@0:     // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
aoqi@0: #if defined _M_IA64
aoqi@0:     else if ((exception_code == EXCEPTION_ILLEGAL_INSTRUCTION ||
aoqi@0:               exception_code == EXCEPTION_ILLEGAL_INSTRUCTION_2)) {
aoqi@0:       M37 handle_wrong_method_break(0, NativeJump::HANDLE_WRONG_METHOD, PR0);
aoqi@0: 
aoqi@0:       // Compiled method patched to be non entrant? Following conditions must apply:
aoqi@0:       // 1. must be first instruction in bundle
aoqi@0:       // 2. must be a break instruction with appropriate code
aoqi@0:       if((((uint64_t) pc & 0x0F) == 0) &&
aoqi@0:          (((IPF_Bundle*) pc)->get_slot0() == handle_wrong_method_break.bits())) {
aoqi@0:         return Handle_Exception(exceptionInfo,
aoqi@0:                                 (address)SharedRuntime::get_handle_wrong_method_stub());
aoqi@0:       }
aoqi@0:     } // /EXCEPTION_ILLEGAL_INSTRUCTION
aoqi@0: #endif
aoqi@0: 
aoqi@0: 
aoqi@0:     if (in_java) {
aoqi@0:       switch (exception_code) {
aoqi@0:       case EXCEPTION_INT_DIVIDE_BY_ZERO:
aoqi@0:         return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO));
aoqi@0: 
aoqi@0:       case EXCEPTION_INT_OVERFLOW:
aoqi@0:         return Handle_IDiv_Exception(exceptionInfo);
aoqi@0: 
aoqi@0:       } // switch
aoqi@0:     }
aoqi@0: #ifndef _WIN64
aoqi@0:     if (((thread->thread_state() == _thread_in_Java) ||
aoqi@0:         (thread->thread_state() == _thread_in_native)) &&
aoqi@0:         exception_code != EXCEPTION_UNCAUGHT_CXX_EXCEPTION)
aoqi@0:     {
aoqi@0:       LONG result=Handle_FLT_Exception(exceptionInfo);
aoqi@0:       if (result==EXCEPTION_CONTINUE_EXECUTION) return result;
aoqi@0:     }
aoqi@0: #endif //_WIN64
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (exception_code != EXCEPTION_BREAKPOINT) {
aoqi@0:     report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord,
aoqi@0:                  exceptionInfo->ContextRecord);
aoqi@0:   }
aoqi@0:   return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: }
aoqi@0: 
aoqi@0: #ifndef _WIN64
aoqi@0: // Special care for fast JNI accessors.
aoqi@0: // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and
aoqi@0: // the heap gets shrunk before the field access.
aoqi@0: // Need to install our own structured exception handler since native code may
aoqi@0: // install its own.
aoqi@0: LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) {
aoqi@0:   DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode;
aoqi@0:   if (exception_code == EXCEPTION_ACCESS_VIOLATION) {
aoqi@0:     address pc = (address) exceptionInfo->ContextRecord->Eip;
aoqi@0:     address addr = JNI_FastGetField::find_slowcase_pc(pc);
aoqi@0:     if (addr != (address)-1) {
aoqi@0:       return Handle_Exception(exceptionInfo, addr);
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: }
aoqi@0: 
aoqi@0: #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \
aoqi@0: Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \
aoqi@0:   __try { \
aoqi@0:     return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \
aoqi@0:   } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \
aoqi@0:   } \
aoqi@0:   return 0; \
aoqi@0: }
aoqi@0: 
aoqi@0: DEFINE_FAST_GETFIELD(jboolean, bool,   Boolean)
aoqi@0: DEFINE_FAST_GETFIELD(jbyte,    byte,   Byte)
aoqi@0: DEFINE_FAST_GETFIELD(jchar,    char,   Char)
aoqi@0: DEFINE_FAST_GETFIELD(jshort,   short,  Short)
aoqi@0: DEFINE_FAST_GETFIELD(jint,     int,    Int)
aoqi@0: DEFINE_FAST_GETFIELD(jlong,    long,   Long)
aoqi@0: DEFINE_FAST_GETFIELD(jfloat,   float,  Float)
aoqi@0: DEFINE_FAST_GETFIELD(jdouble,  double, Double)
aoqi@0: 
aoqi@0: address os::win32::fast_jni_accessor_wrapper(BasicType type) {
aoqi@0:   switch (type) {
aoqi@0:     case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper;
aoqi@0:     case T_BYTE:    return (address)jni_fast_GetByteField_wrapper;
aoqi@0:     case T_CHAR:    return (address)jni_fast_GetCharField_wrapper;
aoqi@0:     case T_SHORT:   return (address)jni_fast_GetShortField_wrapper;
aoqi@0:     case T_INT:     return (address)jni_fast_GetIntField_wrapper;
aoqi@0:     case T_LONG:    return (address)jni_fast_GetLongField_wrapper;
aoqi@0:     case T_FLOAT:   return (address)jni_fast_GetFloatField_wrapper;
aoqi@0:     case T_DOUBLE:  return (address)jni_fast_GetDoubleField_wrapper;
aoqi@0:     default:        ShouldNotReachHere();
aoqi@0:   }
aoqi@0:   return (address)-1;
aoqi@0: }
aoqi@0: #endif
aoqi@0: 
aoqi@0: void os::win32::call_test_func_with_wrapper(void (*funcPtr)(void)) {
aoqi@0:   // Install a win32 structured exception handler around the test
aoqi@0:   // function call so the VM can generate an error dump if needed.
aoqi@0:   __try {
aoqi@0:     (*funcPtr)();
aoqi@0:   } __except(topLevelExceptionFilter(
aoqi@0:              (_EXCEPTION_POINTERS*)_exception_info())) {
aoqi@0:     // Nothing to do.
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Virtual Memory
aoqi@0: 
aoqi@0: int os::vm_page_size() { return os::win32::vm_page_size(); }
aoqi@0: int os::vm_allocation_granularity() {
aoqi@0:   return os::win32::vm_allocation_granularity();
aoqi@0: }
aoqi@0: 
aoqi@0: // Windows large page support is available on Windows 2003. In order to use
aoqi@0: // large page memory, the administrator must first assign additional privilege
aoqi@0: // to the user:
aoqi@0: //   + select Control Panel -> Administrative Tools -> Local Security Policy
aoqi@0: //   + select Local Policies -> User Rights Assignment
aoqi@0: //   + double click "Lock pages in memory", add users and/or groups
aoqi@0: //   + reboot
aoqi@0: // Note the above steps are needed for administrator as well, as administrators
aoqi@0: // by default do not have the privilege to lock pages in memory.
aoqi@0: //
aoqi@0: // Note about Windows 2003: although the API supports committing large page
aoqi@0: // memory on a page-by-page basis and VirtualAlloc() returns success under this
aoqi@0: // scenario, I found through experiment it only uses large page if the entire
aoqi@0: // memory region is reserved and committed in a single VirtualAlloc() call.
aoqi@0: // This makes Windows large page support more or less like Solaris ISM, in
aoqi@0: // that the entire heap must be committed upfront. This probably will change
aoqi@0: // in the future, if so the code below needs to be revisited.
aoqi@0: 
aoqi@0: #ifndef MEM_LARGE_PAGES
aoqi@0: #define MEM_LARGE_PAGES 0x20000000
aoqi@0: #endif
aoqi@0: 
aoqi@0: static HANDLE    _hProcess;
aoqi@0: static HANDLE    _hToken;
aoqi@0: 
aoqi@0: // Container for NUMA node list info
aoqi@0: class NUMANodeListHolder {
aoqi@0: private:
aoqi@0:   int *_numa_used_node_list;  // allocated below
aoqi@0:   int _numa_used_node_count;
aoqi@0: 
aoqi@0:   void free_node_list() {
aoqi@0:     if (_numa_used_node_list != NULL) {
aoqi@0:       FREE_C_HEAP_ARRAY(int, _numa_used_node_list, mtInternal);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0: public:
aoqi@0:   NUMANodeListHolder() {
aoqi@0:     _numa_used_node_count = 0;
aoqi@0:     _numa_used_node_list = NULL;
aoqi@0:     // do rest of initialization in build routine (after function pointers are set up)
aoqi@0:   }
aoqi@0: 
aoqi@0:   ~NUMANodeListHolder() {
aoqi@0:     free_node_list();
aoqi@0:   }
aoqi@0: 
aoqi@0:   bool build() {
aoqi@0:     DWORD_PTR proc_aff_mask;
aoqi@0:     DWORD_PTR sys_aff_mask;
aoqi@0:     if (!GetProcessAffinityMask(GetCurrentProcess(), &proc_aff_mask, &sys_aff_mask)) return false;
aoqi@0:     ULONG highest_node_number;
aoqi@0:     if (!os::Kernel32Dll::GetNumaHighestNodeNumber(&highest_node_number)) return false;
aoqi@0:     free_node_list();
aoqi@0:     _numa_used_node_list = NEW_C_HEAP_ARRAY(int, highest_node_number + 1, mtInternal);
aoqi@0:     for (unsigned int i = 0; i <= highest_node_number; i++) {
aoqi@0:       ULONGLONG proc_mask_numa_node;
aoqi@0:       if (!os::Kernel32Dll::GetNumaNodeProcessorMask(i, &proc_mask_numa_node)) return false;
aoqi@0:       if ((proc_aff_mask & proc_mask_numa_node)!=0) {
aoqi@0:         _numa_used_node_list[_numa_used_node_count++] = i;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     return (_numa_used_node_count > 1);
aoqi@0:   }
aoqi@0: 
aoqi@0:   int get_count() {return _numa_used_node_count;}
aoqi@0:   int get_node_list_entry(int n) {
aoqi@0:     // for indexes out of range, returns -1
aoqi@0:     return (n < _numa_used_node_count ? _numa_used_node_list[n] : -1);
aoqi@0:   }
aoqi@0: 
aoqi@0: } numa_node_list_holder;
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: static size_t _large_page_size = 0;
aoqi@0: 
aoqi@0: static bool resolve_functions_for_large_page_init() {
aoqi@0:   return os::Kernel32Dll::GetLargePageMinimumAvailable() &&
aoqi@0:     os::Advapi32Dll::AdvapiAvailable();
aoqi@0: }
aoqi@0: 
aoqi@0: static bool request_lock_memory_privilege() {
aoqi@0:   _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE,
aoqi@0:                                 os::current_process_id());
aoqi@0: 
aoqi@0:   LUID luid;
aoqi@0:   if (_hProcess != NULL &&
aoqi@0:       os::Advapi32Dll::OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) &&
aoqi@0:       os::Advapi32Dll::LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) {
aoqi@0: 
aoqi@0:     TOKEN_PRIVILEGES tp;
aoqi@0:     tp.PrivilegeCount = 1;
aoqi@0:     tp.Privileges[0].Luid = luid;
aoqi@0:     tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
aoqi@0: 
aoqi@0:     // AdjustTokenPrivileges() may return TRUE even when it couldn't change the
aoqi@0:     // privilege. Check GetLastError() too. See MSDN document.
aoqi@0:     if (os::Advapi32Dll::AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) &&
aoqi@0:         (GetLastError() == ERROR_SUCCESS)) {
aoqi@0:       return true;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: static void cleanup_after_large_page_init() {
aoqi@0:   if (_hProcess) CloseHandle(_hProcess);
aoqi@0:   _hProcess = NULL;
aoqi@0:   if (_hToken) CloseHandle(_hToken);
aoqi@0:   _hToken = NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: static bool numa_interleaving_init() {
aoqi@0:   bool success = false;
aoqi@0:   bool use_numa_interleaving_specified = !FLAG_IS_DEFAULT(UseNUMAInterleaving);
aoqi@0: 
aoqi@0:   // print a warning if UseNUMAInterleaving flag is specified on command line
aoqi@0:   bool warn_on_failure = use_numa_interleaving_specified;
aoqi@0: # define WARN(msg) if (warn_on_failure) { warning(msg); }
aoqi@0: 
aoqi@0:   // NUMAInterleaveGranularity cannot be less than vm_allocation_granularity (or _large_page_size if using large pages)
aoqi@0:   size_t min_interleave_granularity = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
aoqi@0:   NUMAInterleaveGranularity = align_size_up(NUMAInterleaveGranularity, min_interleave_granularity);
aoqi@0: 
aoqi@0:   if (os::Kernel32Dll::NumaCallsAvailable()) {
aoqi@0:     if (numa_node_list_holder.build()) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         tty->print("NUMA UsedNodeCount=%d, namely ", numa_node_list_holder.get_count());
aoqi@0:         for (int i = 0; i < numa_node_list_holder.get_count(); i++) {
aoqi@0:           tty->print("%d ", numa_node_list_holder.get_node_list_entry(i));
aoqi@0:         }
aoqi@0:         tty->print("\n");
aoqi@0:       }
aoqi@0:       success = true;
aoqi@0:     } else {
aoqi@0:       WARN("Process does not cover multiple NUMA nodes.");
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     WARN("NUMA Interleaving is not supported by the operating system.");
aoqi@0:   }
aoqi@0:   if (!success) {
aoqi@0:     if (use_numa_interleaving_specified) WARN("...Ignoring UseNUMAInterleaving flag.");
aoqi@0:   }
aoqi@0:   return success;
aoqi@0: #undef WARN
aoqi@0: }
aoqi@0: 
aoqi@0: // this routine is used whenever we need to reserve a contiguous VA range
aoqi@0: // but we need to make separate VirtualAlloc calls for each piece of the range
aoqi@0: // Reasons for doing this:
aoqi@0: //  * UseLargePagesIndividualAllocation was set (normally only needed on WS2003 but possible to be set otherwise)
aoqi@0: //  * UseNUMAInterleaving requires a separate node for each piece
aoqi@0: static char* allocate_pages_individually(size_t bytes, char* addr, DWORD flags, DWORD prot,
aoqi@0:                                          bool should_inject_error=false) {
aoqi@0:   char * p_buf;
aoqi@0:   // note: at setup time we guaranteed that NUMAInterleaveGranularity was aligned up to a page size
aoqi@0:   size_t page_size = UseLargePages ? _large_page_size : os::vm_allocation_granularity();
aoqi@0:   size_t chunk_size = UseNUMAInterleaving ? NUMAInterleaveGranularity : page_size;
aoqi@0: 
aoqi@0:   // first reserve enough address space in advance since we want to be
aoqi@0:   // able to break a single contiguous virtual address range into multiple
aoqi@0:   // large page commits but WS2003 does not allow reserving large page space
aoqi@0:   // so we just use 4K pages for reserve, this gives us a legal contiguous
aoqi@0:   // address space. then we will deallocate that reservation, and re alloc
aoqi@0:   // using large pages
aoqi@0:   const size_t size_of_reserve = bytes + chunk_size;
aoqi@0:   if (bytes > size_of_reserve) {
aoqi@0:     // Overflowed.
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0:   p_buf = (char *) VirtualAlloc(addr,
aoqi@0:                                 size_of_reserve,  // size of Reserve
aoqi@0:                                 MEM_RESERVE,
aoqi@0:                                 PAGE_READWRITE);
aoqi@0:   // If reservation failed, return NULL
aoqi@0:   if (p_buf == NULL) return NULL;
aoqi@0:   MemTracker::record_virtual_memory_reserve((address)p_buf, size_of_reserve, mtNone, CALLER_PC);
aoqi@0:   os::release_memory(p_buf, bytes + chunk_size);
aoqi@0: 
aoqi@0:   // we still need to round up to a page boundary (in case we are using large pages)
aoqi@0:   // but not to a chunk boundary (in case InterleavingGranularity doesn't align with page size)
aoqi@0:   // instead we handle this in the bytes_to_rq computation below
aoqi@0:   p_buf = (char *) align_size_up((size_t)p_buf, page_size);
aoqi@0: 
aoqi@0:   // now go through and allocate one chunk at a time until all bytes are
aoqi@0:   // allocated
aoqi@0:   size_t  bytes_remaining = bytes;
aoqi@0:   // An overflow of align_size_up() would have been caught above
aoqi@0:   // in the calculation of size_of_reserve.
aoqi@0:   char * next_alloc_addr = p_buf;
aoqi@0:   HANDLE hProc = GetCurrentProcess();
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0:   // Variable for the failure injection
aoqi@0:   long ran_num = os::random();
aoqi@0:   size_t fail_after = ran_num % bytes;
aoqi@0: #endif
aoqi@0: 
aoqi@0:   int count=0;
aoqi@0:   while (bytes_remaining) {
aoqi@0:     // select bytes_to_rq to get to the next chunk_size boundary
aoqi@0: 
aoqi@0:     size_t bytes_to_rq = MIN2(bytes_remaining, chunk_size - ((size_t)next_alloc_addr % chunk_size));
aoqi@0:     // Note allocate and commit
aoqi@0:     char * p_new;
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0:     bool inject_error_now = should_inject_error && (bytes_remaining <= fail_after);
aoqi@0: #else
aoqi@0:     const bool inject_error_now = false;
aoqi@0: #endif
aoqi@0: 
aoqi@0:     if (inject_error_now) {
aoqi@0:       p_new = NULL;
aoqi@0:     } else {
aoqi@0:       if (!UseNUMAInterleaving) {
aoqi@0:         p_new = (char *) VirtualAlloc(next_alloc_addr,
aoqi@0:                                       bytes_to_rq,
aoqi@0:                                       flags,
aoqi@0:                                       prot);
aoqi@0:       } else {
aoqi@0:         // get the next node to use from the used_node_list
aoqi@0:         assert(numa_node_list_holder.get_count() > 0, "Multiple NUMA nodes expected");
aoqi@0:         DWORD node = numa_node_list_holder.get_node_list_entry(count % numa_node_list_holder.get_count());
aoqi@0:         p_new = (char *)os::Kernel32Dll::VirtualAllocExNuma(hProc,
aoqi@0:                                                             next_alloc_addr,
aoqi@0:                                                             bytes_to_rq,
aoqi@0:                                                             flags,
aoqi@0:                                                             prot,
aoqi@0:                                                             node);
aoqi@0:       }
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (p_new == NULL) {
aoqi@0:       // Free any allocated pages
aoqi@0:       if (next_alloc_addr > p_buf) {
aoqi@0:         // Some memory was committed so release it.
aoqi@0:         size_t bytes_to_release = bytes - bytes_remaining;
aoqi@0:         // NMT has yet to record any individual blocks, so it
aoqi@0:         // need to create a dummy 'reserve' record to match
aoqi@0:         // the release.
aoqi@0:         MemTracker::record_virtual_memory_reserve((address)p_buf,
aoqi@0:           bytes_to_release, mtNone, CALLER_PC);
aoqi@0:         os::release_memory(p_buf, bytes_to_release);
aoqi@0:       }
aoqi@0: #ifdef ASSERT
aoqi@0:       if (should_inject_error) {
aoqi@0:         if (TracePageSizes && Verbose) {
aoqi@0:           tty->print_cr("Reserving pages individually failed.");
aoqi@0:         }
aoqi@0:       }
aoqi@0: #endif
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0: 
aoqi@0:     bytes_remaining -= bytes_to_rq;
aoqi@0:     next_alloc_addr += bytes_to_rq;
aoqi@0:     count++;
aoqi@0:   }
aoqi@0:   // Although the memory is allocated individually, it is returned as one.
aoqi@0:   // NMT records it as one block.
aoqi@0:   address pc = CALLER_PC;
aoqi@0:   if ((flags & MEM_COMMIT) != 0) {
aoqi@0:     MemTracker::record_virtual_memory_reserve_and_commit((address)p_buf, bytes, mtNone, pc);
aoqi@0:   } else {
aoqi@0:     MemTracker::record_virtual_memory_reserve((address)p_buf, bytes, mtNone, pc);
aoqi@0:   }
aoqi@0: 
aoqi@0:   // made it this far, success
aoqi@0:   return p_buf;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: void os::large_page_init() {
aoqi@0:   if (!UseLargePages) return;
aoqi@0: 
aoqi@0:   // print a warning if any large page related flag is specified on command line
aoqi@0:   bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) ||
aoqi@0:                          !FLAG_IS_DEFAULT(LargePageSizeInBytes);
aoqi@0:   bool success = false;
aoqi@0: 
aoqi@0: # define WARN(msg) if (warn_on_failure) { warning(msg); }
aoqi@0:   if (resolve_functions_for_large_page_init()) {
aoqi@0:     if (request_lock_memory_privilege()) {
aoqi@0:       size_t s = os::Kernel32Dll::GetLargePageMinimum();
aoqi@0:       if (s) {
aoqi@0: #if defined(IA32) || defined(AMD64)
aoqi@0:         if (s > 4*M || LargePageSizeInBytes > 4*M) {
aoqi@0:           WARN("JVM cannot use large pages bigger than 4mb.");
aoqi@0:         } else {
aoqi@0: #endif
aoqi@0:           if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) {
aoqi@0:             _large_page_size = LargePageSizeInBytes;
aoqi@0:           } else {
aoqi@0:             _large_page_size = s;
aoqi@0:           }
aoqi@0:           success = true;
aoqi@0: #if defined(IA32) || defined(AMD64)
aoqi@0:         }
aoqi@0: #endif
aoqi@0:       } else {
aoqi@0:         WARN("Large page is not supported by the processor.");
aoqi@0:       }
aoqi@0:     } else {
aoqi@0:       WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.");
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     WARN("Large page is not supported by the operating system.");
aoqi@0:   }
aoqi@0: #undef WARN
aoqi@0: 
aoqi@0:   const size_t default_page_size = (size_t) vm_page_size();
aoqi@0:   if (success && _large_page_size > default_page_size) {
aoqi@0:     _page_sizes[0] = _large_page_size;
aoqi@0:     _page_sizes[1] = default_page_size;
aoqi@0:     _page_sizes[2] = 0;
aoqi@0:   }
aoqi@0: 
aoqi@0:   cleanup_after_large_page_init();
aoqi@0:   UseLargePages = success;
aoqi@0: }
aoqi@0: 
aoqi@0: // On win32, one cannot release just a part of reserved memory, it's an
aoqi@0: // all or nothing deal.  When we split a reservation, we must break the
aoqi@0: // reservation into two reservations.
aoqi@0: void os::pd_split_reserved_memory(char *base, size_t size, size_t split,
aoqi@0:                               bool realloc) {
aoqi@0:   if (size > 0) {
aoqi@0:     release_memory(base, size);
aoqi@0:     if (realloc) {
aoqi@0:       reserve_memory(split, base);
aoqi@0:     }
aoqi@0:     if (size != split) {
aoqi@0:       reserve_memory(size - split, base + split);
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Multiple threads can race in this code but it's not possible to unmap small sections of
aoqi@0: // virtual space to get requested alignment, like posix-like os's.
aoqi@0: // Windows prevents multiple thread from remapping over each other so this loop is thread-safe.
aoqi@0: char* os::reserve_memory_aligned(size_t size, size_t alignment) {
aoqi@0:   assert((alignment & (os::vm_allocation_granularity() - 1)) == 0,
aoqi@0:       "Alignment must be a multiple of allocation granularity (page size)");
aoqi@0:   assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned");
aoqi@0: 
aoqi@0:   size_t extra_size = size + alignment;
aoqi@0:   assert(extra_size >= size, "overflow, size is too large to allow alignment");
aoqi@0: 
aoqi@0:   char* aligned_base = NULL;
aoqi@0: 
aoqi@0:   do {
aoqi@0:     char* extra_base = os::reserve_memory(extra_size, NULL, alignment);
aoqi@0:     if (extra_base == NULL) {
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0:     // Do manual alignment
aoqi@0:     aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment);
aoqi@0: 
aoqi@0:     os::release_memory(extra_base, extra_size);
aoqi@0: 
aoqi@0:     aligned_base = os::reserve_memory(size, aligned_base);
aoqi@0: 
aoqi@0:   } while (aligned_base == NULL);
aoqi@0: 
aoqi@0:   return aligned_base;
aoqi@0: }
aoqi@0: 
aoqi@0: char* os::pd_reserve_memory(size_t bytes, char* addr, size_t alignment_hint) {
aoqi@0:   assert((size_t)addr % os::vm_allocation_granularity() == 0,
aoqi@0:          "reserve alignment");
aoqi@0:   assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
aoqi@0:   char* res;
aoqi@0:   // note that if UseLargePages is on, all the areas that require interleaving
aoqi@0:   // will go thru reserve_memory_special rather than thru here.
aoqi@0:   bool use_individual = (UseNUMAInterleaving && !UseLargePages);
aoqi@0:   if (!use_individual) {
aoqi@0:     res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
aoqi@0:   } else {
aoqi@0:     elapsedTimer reserveTimer;
aoqi@0:     if( Verbose && PrintMiscellaneous ) reserveTimer.start();
aoqi@0:     // in numa interleaving, we have to allocate pages individually
aoqi@0:     // (well really chunks of NUMAInterleaveGranularity size)
aoqi@0:     res = allocate_pages_individually(bytes, addr, MEM_RESERVE, PAGE_READWRITE);
aoqi@0:     if (res == NULL) {
aoqi@0:       warning("NUMA page allocation failed");
aoqi@0:     }
aoqi@0:     if( Verbose && PrintMiscellaneous ) {
aoqi@0:       reserveTimer.stop();
aoqi@0:       tty->print_cr("reserve_memory of %Ix bytes took " JLONG_FORMAT " ms (" JLONG_FORMAT " ticks)", bytes,
aoqi@0:                     reserveTimer.milliseconds(), reserveTimer.ticks());
aoqi@0:     }
aoqi@0:   }
aoqi@0:   assert(res == NULL || addr == NULL || addr == res,
aoqi@0:          "Unexpected address from reserve.");
aoqi@0: 
aoqi@0:   return res;
aoqi@0: }
aoqi@0: 
aoqi@0: // Reserve memory at an arbitrary address, only if that area is
aoqi@0: // available (and not reserved for something else).
aoqi@0: char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
aoqi@0:   // Windows os::reserve_memory() fails of the requested address range is
aoqi@0:   // not avilable.
aoqi@0:   return reserve_memory(bytes, requested_addr);
aoqi@0: }
aoqi@0: 
aoqi@0: size_t os::large_page_size() {
aoqi@0:   return _large_page_size;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::can_commit_large_page_memory() {
aoqi@0:   // Windows only uses large page memory when the entire region is reserved
aoqi@0:   // and committed in a single VirtualAlloc() call. This may change in the
aoqi@0:   // future, but with Windows 2003 it's not possible to commit on demand.
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::can_execute_large_page_memory() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: char* os::reserve_memory_special(size_t bytes, size_t alignment, char* addr, bool exec) {
aoqi@0:   assert(UseLargePages, "only for large pages");
aoqi@0: 
aoqi@0:   if (!is_size_aligned(bytes, os::large_page_size()) || alignment > os::large_page_size()) {
aoqi@0:     return NULL; // Fallback to small pages.
aoqi@0:   }
aoqi@0: 
aoqi@0:   const DWORD prot = exec ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
aoqi@0:   const DWORD flags = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
aoqi@0: 
aoqi@0:   // with large pages, there are two cases where we need to use Individual Allocation
aoqi@0:   // 1) the UseLargePagesIndividualAllocation flag is set (set by default on WS2003)
aoqi@0:   // 2) NUMA Interleaving is enabled, in which case we use a different node for each page
aoqi@0:   if (UseLargePagesIndividualAllocation || UseNUMAInterleaving) {
aoqi@0:     if (TracePageSizes && Verbose) {
aoqi@0:        tty->print_cr("Reserving large pages individually.");
aoqi@0:     }
aoqi@0:     char * p_buf = allocate_pages_individually(bytes, addr, flags, prot, LargePagesIndividualAllocationInjectError);
aoqi@0:     if (p_buf == NULL) {
aoqi@0:       // give an appropriate warning message
aoqi@0:       if (UseNUMAInterleaving) {
aoqi@0:         warning("NUMA large page allocation failed, UseLargePages flag ignored");
aoqi@0:       }
aoqi@0:       if (UseLargePagesIndividualAllocation) {
aoqi@0:         warning("Individually allocated large pages failed, "
aoqi@0:                 "use -XX:-UseLargePagesIndividualAllocation to turn off");
aoqi@0:       }
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0: 
aoqi@0:     return p_buf;
aoqi@0: 
aoqi@0:   } else {
aoqi@0:     if (TracePageSizes && Verbose) {
aoqi@0:        tty->print_cr("Reserving large pages in a single large chunk.");
aoqi@0:     }
aoqi@0:     // normal policy just allocate it all at once
aoqi@0:     DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
aoqi@0:     char * res = (char *)VirtualAlloc(addr, bytes, flag, prot);
aoqi@0:     if (res != NULL) {
aoqi@0:       address pc = CALLER_PC;
aoqi@0:       MemTracker::record_virtual_memory_reserve_and_commit((address)res, bytes, mtNone, pc);
aoqi@0:     }
aoqi@0: 
aoqi@0:     return res;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::release_memory_special(char* base, size_t bytes) {
aoqi@0:   assert(base != NULL, "Sanity check");
aoqi@0:   return release_memory(base, bytes);
aoqi@0: }
aoqi@0: 
aoqi@0: void os::print_statistics() {
aoqi@0: }
aoqi@0: 
aoqi@0: static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec) {
aoqi@0:   int err = os::get_last_error();
aoqi@0:   char buf[256];
aoqi@0:   size_t buf_len = os::lasterror(buf, sizeof(buf));
aoqi@0:   warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT
aoqi@0:           ", %d) failed; error='%s' (DOS error/errno=%d)", addr, bytes,
aoqi@0:           exec, buf_len != 0 ? buf : "<no_error_string>", err);
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) {
aoqi@0:   if (bytes == 0) {
aoqi@0:     // Don't bother the OS with noops.
aoqi@0:     return true;
aoqi@0:   }
aoqi@0:   assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries");
aoqi@0:   assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
aoqi@0:   // Don't attempt to print anything if the OS call fails. We're
aoqi@0:   // probably low on resources, so the print itself may cause crashes.
aoqi@0: 
aoqi@0:   // unless we have NUMAInterleaving enabled, the range of a commit
aoqi@0:   // is always within a reserve covered by a single VirtualAlloc
aoqi@0:   // in that case we can just do a single commit for the requested size
aoqi@0:   if (!UseNUMAInterleaving) {
aoqi@0:     if (VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) == NULL) {
aoqi@0:       NOT_PRODUCT(warn_fail_commit_memory(addr, bytes, exec);)
aoqi@0:       return false;
aoqi@0:     }
aoqi@0:     if (exec) {
aoqi@0:       DWORD oldprot;
aoqi@0:       // Windows doc says to use VirtualProtect to get execute permissions
aoqi@0:       if (!VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot)) {
aoqi@0:         NOT_PRODUCT(warn_fail_commit_memory(addr, bytes, exec);)
aoqi@0:         return false;
aoqi@0:       }
aoqi@0:     }
aoqi@0:     return true;
aoqi@0:   } else {
aoqi@0: 
aoqi@0:     // when NUMAInterleaving is enabled, the commit might cover a range that
aoqi@0:     // came from multiple VirtualAlloc reserves (using allocate_pages_individually).
aoqi@0:     // VirtualQuery can help us determine that.  The RegionSize that VirtualQuery
aoqi@0:     // returns represents the number of bytes that can be committed in one step.
aoqi@0:     size_t bytes_remaining = bytes;
aoqi@0:     char * next_alloc_addr = addr;
aoqi@0:     while (bytes_remaining > 0) {
aoqi@0:       MEMORY_BASIC_INFORMATION alloc_info;
aoqi@0:       VirtualQuery(next_alloc_addr, &alloc_info, sizeof(alloc_info));
aoqi@0:       size_t bytes_to_rq = MIN2(bytes_remaining, (size_t)alloc_info.RegionSize);
aoqi@0:       if (VirtualAlloc(next_alloc_addr, bytes_to_rq, MEM_COMMIT,
aoqi@0:                        PAGE_READWRITE) == NULL) {
aoqi@0:         NOT_PRODUCT(warn_fail_commit_memory(next_alloc_addr, bytes_to_rq,
aoqi@0:                                             exec);)
aoqi@0:         return false;
aoqi@0:       }
aoqi@0:       if (exec) {
aoqi@0:         DWORD oldprot;
aoqi@0:         if (!VirtualProtect(next_alloc_addr, bytes_to_rq,
aoqi@0:                             PAGE_EXECUTE_READWRITE, &oldprot)) {
aoqi@0:           NOT_PRODUCT(warn_fail_commit_memory(next_alloc_addr, bytes_to_rq,
aoqi@0:                                               exec);)
aoqi@0:           return false;
aoqi@0:         }
aoqi@0:       }
aoqi@0:       bytes_remaining -= bytes_to_rq;
aoqi@0:       next_alloc_addr += bytes_to_rq;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   // if we made it this far, return true
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint,
aoqi@0:                        bool exec) {
aoqi@0:   // alignment_hint is ignored on this OS
aoqi@0:   return pd_commit_memory(addr, size, exec);
aoqi@0: }
aoqi@0: 
aoqi@0: void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec,
aoqi@0:                                   const char* mesg) {
aoqi@0:   assert(mesg != NULL, "mesg must be specified");
aoqi@0:   if (!pd_commit_memory(addr, size, exec)) {
aoqi@0:     warn_fail_commit_memory(addr, size, exec);
aoqi@0:     vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::pd_commit_memory_or_exit(char* addr, size_t size,
aoqi@0:                                   size_t alignment_hint, bool exec,
aoqi@0:                                   const char* mesg) {
aoqi@0:   // alignment_hint is ignored on this OS
aoqi@0:   pd_commit_memory_or_exit(addr, size, exec, mesg);
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::pd_uncommit_memory(char* addr, size_t bytes) {
aoqi@0:   if (bytes == 0) {
aoqi@0:     // Don't bother the OS with noops.
aoqi@0:     return true;
aoqi@0:   }
aoqi@0:   assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries");
aoqi@0:   assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks");
aoqi@0:   return (VirtualFree(addr, bytes, MEM_DECOMMIT) != 0);
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::pd_release_memory(char* addr, size_t bytes) {
aoqi@0:   return VirtualFree(addr, 0, MEM_RELEASE) != 0;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
aoqi@0:   return os::commit_memory(addr, size, !ExecMem);
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::remove_stack_guard_pages(char* addr, size_t size) {
aoqi@0:   return os::uncommit_memory(addr, size);
aoqi@0: }
aoqi@0: 
aoqi@0: // Set protections specified
aoqi@0: bool os::protect_memory(char* addr, size_t bytes, ProtType prot,
aoqi@0:                         bool is_committed) {
aoqi@0:   unsigned int p = 0;
aoqi@0:   switch (prot) {
aoqi@0:   case MEM_PROT_NONE: p = PAGE_NOACCESS; break;
aoqi@0:   case MEM_PROT_READ: p = PAGE_READONLY; break;
aoqi@0:   case MEM_PROT_RW:   p = PAGE_READWRITE; break;
aoqi@0:   case MEM_PROT_RWX:  p = PAGE_EXECUTE_READWRITE; break;
aoqi@0:   default:
aoqi@0:     ShouldNotReachHere();
aoqi@0:   }
aoqi@0: 
aoqi@0:   DWORD old_status;
aoqi@0: 
aoqi@0:   // Strange enough, but on Win32 one can change protection only for committed
aoqi@0:   // memory, not a big deal anyway, as bytes less or equal than 64K
aoqi@0:   if (!is_committed) {
aoqi@0:     commit_memory_or_exit(addr, bytes, prot == MEM_PROT_RWX,
aoqi@0:                           "cannot commit protection page");
aoqi@0:   }
aoqi@0:   // One cannot use os::guard_memory() here, as on Win32 guard page
aoqi@0:   // have different (one-shot) semantics, from MSDN on PAGE_GUARD:
aoqi@0:   //
aoqi@0:   // Pages in the region become guard pages. Any attempt to access a guard page
aoqi@0:   // causes the system to raise a STATUS_GUARD_PAGE exception and turn off
aoqi@0:   // the guard page status. Guard pages thus act as a one-time access alarm.
aoqi@0:   return VirtualProtect(addr, bytes, p, &old_status) != 0;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::guard_memory(char* addr, size_t bytes) {
aoqi@0:   DWORD old_status;
aoqi@0:   return VirtualProtect(addr, bytes, PAGE_READWRITE | PAGE_GUARD, &old_status) != 0;
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::unguard_memory(char* addr, size_t bytes) {
aoqi@0:   DWORD old_status;
aoqi@0:   return VirtualProtect(addr, bytes, PAGE_READWRITE, &old_status) != 0;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { }
aoqi@0: void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { }
aoqi@0: void os::numa_make_global(char *addr, size_t bytes)    { }
aoqi@0: void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint)    { }
aoqi@0: bool os::numa_topology_changed()                       { return false; }
aoqi@0: size_t os::numa_get_groups_num()                       { return MAX2(numa_node_list_holder.get_count(), 1); }
aoqi@0: int os::numa_get_group_id()                            { return 0; }
aoqi@0: size_t os::numa_get_leaf_groups(int *ids, size_t size) {
aoqi@0:   if (numa_node_list_holder.get_count() == 0 && size > 0) {
aoqi@0:     // Provide an answer for UMA systems
aoqi@0:     ids[0] = 0;
aoqi@0:     return 1;
aoqi@0:   } else {
aoqi@0:     // check for size bigger than actual groups_num
aoqi@0:     size = MIN2(size, numa_get_groups_num());
aoqi@0:     for (int i = 0; i < (int)size; i++) {
aoqi@0:       ids[i] = numa_node_list_holder.get_node_list_entry(i);
aoqi@0:     }
aoqi@0:     return size;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::get_page_info(char *start, page_info* info) {
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) {
aoqi@0:   return end;
aoqi@0: }
aoqi@0: 
aoqi@0: char* os::non_memory_address_word() {
aoqi@0:   // Must never look like an address returned by reserve_memory,
aoqi@0:   // even in its subfields (as defined by the CPU immediate fields,
aoqi@0:   // if the CPU splits constants across multiple instructions).
aoqi@0:   return (char*)-1;
aoqi@0: }
aoqi@0: 
aoqi@0: #define MAX_ERROR_COUNT 100
aoqi@0: #define SYS_THREAD_ERROR 0xffffffffUL
aoqi@0: 
aoqi@0: void os::pd_start_thread(Thread* thread) {
aoqi@0:   DWORD ret = ResumeThread(thread->osthread()->thread_handle());
aoqi@0:   // Returns previous suspend state:
aoqi@0:   // 0:  Thread was not suspended
aoqi@0:   // 1:  Thread is running now
aoqi@0:   // >1: Thread is still suspended.
aoqi@0:   assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back
aoqi@0: }
aoqi@0: 
aoqi@0: class HighResolutionInterval : public CHeapObj<mtThread> {
aoqi@0:   // The default timer resolution seems to be 10 milliseconds.
aoqi@0:   // (Where is this written down?)
aoqi@0:   // If someone wants to sleep for only a fraction of the default,
aoqi@0:   // then we set the timer resolution down to 1 millisecond for
aoqi@0:   // the duration of their interval.
aoqi@0:   // We carefully set the resolution back, since otherwise we
aoqi@0:   // seem to incur an overhead (3%?) that we don't need.
aoqi@0:   // CONSIDER: if ms is small, say 3, then we should run with a high resolution time.
aoqi@0:   // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod().
aoqi@0:   // Alternatively, we could compute the relative error (503/500 = .6%) and only use
aoqi@0:   // timeBeginPeriod() if the relative error exceeded some threshold.
aoqi@0:   // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and
aoqi@0:   // to decreased efficiency related to increased timer "tick" rates.  We want to minimize
aoqi@0:   // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high
aoqi@0:   // resolution timers running.
aoqi@0: private:
aoqi@0:     jlong resolution;
aoqi@0: public:
aoqi@0:   HighResolutionInterval(jlong ms) {
aoqi@0:     resolution = ms % 10L;
aoqi@0:     if (resolution != 0) {
aoqi@0:       MMRESULT result = timeBeginPeriod(1L);
aoqi@0:     }
aoqi@0:   }
aoqi@0:   ~HighResolutionInterval() {
aoqi@0:     if (resolution != 0) {
aoqi@0:       MMRESULT result = timeEndPeriod(1L);
aoqi@0:     }
aoqi@0:     resolution = 0L;
aoqi@0:   }
aoqi@0: };
aoqi@0: 
aoqi@0: int os::sleep(Thread* thread, jlong ms, bool interruptable) {
aoqi@0:   jlong limit = (jlong) MAXDWORD;
aoqi@0: 
aoqi@0:   while(ms > limit) {
aoqi@0:     int res;
aoqi@0:     if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT)
aoqi@0:       return res;
aoqi@0:     ms -= limit;
aoqi@0:   }
aoqi@0: 
aoqi@0:   assert(thread == Thread::current(),  "thread consistency check");
aoqi@0:   OSThread* osthread = thread->osthread();
aoqi@0:   OSThreadWaitState osts(osthread, false /* not Object.wait() */);
aoqi@0:   int result;
aoqi@0:   if (interruptable) {
aoqi@0:     assert(thread->is_Java_thread(), "must be java thread");
aoqi@0:     JavaThread *jt = (JavaThread *) thread;
aoqi@0:     ThreadBlockInVM tbivm(jt);
aoqi@0: 
aoqi@0:     jt->set_suspend_equivalent();
aoqi@0:     // cleared by handle_special_suspend_equivalent_condition() or
aoqi@0:     // java_suspend_self() via check_and_wait_while_suspended()
aoqi@0: 
aoqi@0:     HANDLE events[1];
aoqi@0:     events[0] = osthread->interrupt_event();
aoqi@0:     HighResolutionInterval *phri=NULL;
aoqi@0:     if(!ForceTimeHighResolution)
aoqi@0:       phri = new HighResolutionInterval( ms );
aoqi@0:     if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) {
aoqi@0:       result = OS_TIMEOUT;
aoqi@0:     } else {
aoqi@0:       ResetEvent(osthread->interrupt_event());
aoqi@0:       osthread->set_interrupted(false);
aoqi@0:       result = OS_INTRPT;
aoqi@0:     }
aoqi@0:     delete phri; //if it is NULL, harmless
aoqi@0: 
aoqi@0:     // were we externally suspended while we were waiting?
aoqi@0:     jt->check_and_wait_while_suspended();
aoqi@0:   } else {
aoqi@0:     assert(!thread->is_Java_thread(), "must not be java thread");
aoqi@0:     Sleep((long) ms);
aoqi@0:     result = OS_TIMEOUT;
aoqi@0:   }
aoqi@0:   return result;
aoqi@0: }
aoqi@0: 
aoqi@0: //
aoqi@0: // Short sleep, direct OS call.
aoqi@0: //
aoqi@0: // ms = 0, means allow others (if any) to run.
aoqi@0: //
aoqi@0: void os::naked_short_sleep(jlong ms) {
aoqi@0:   assert(ms < 1000, "Un-interruptable sleep, short time use only");
aoqi@0:   Sleep(ms);
aoqi@0: }
aoqi@0: 
aoqi@0: // Sleep forever; naked call to OS-specific sleep; use with CAUTION
aoqi@0: void os::infinite_sleep() {
aoqi@0:   while (true) {    // sleep forever ...
aoqi@0:     Sleep(100000);  // ... 100 seconds at a time
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: typedef BOOL (WINAPI * STTSignature)(void) ;
aoqi@0: 
aoqi@0: os::YieldResult os::NakedYield() {
aoqi@0:   // Use either SwitchToThread() or Sleep(0)
aoqi@0:   // Consider passing back the return value from SwitchToThread().
aoqi@0:   if (os::Kernel32Dll::SwitchToThreadAvailable()) {
aoqi@0:     return SwitchToThread() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ;
aoqi@0:   } else {
aoqi@0:     Sleep(0);
aoqi@0:   }
aoqi@0:   return os::YIELD_UNKNOWN ;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::yield() {  os::NakedYield(); }
aoqi@0: 
aoqi@0: void os::yield_all(int attempts) {
aoqi@0:   // Yields to all threads, including threads with lower priorities
aoqi@0:   Sleep(1);
aoqi@0: }
aoqi@0: 
aoqi@0: // Win32 only gives you access to seven real priorities at a time,
aoqi@0: // so we compress Java's ten down to seven.  It would be better
aoqi@0: // if we dynamically adjusted relative priorities.
aoqi@0: 
aoqi@0: int os::java_to_os_priority[CriticalPriority + 1] = {
aoqi@0:   THREAD_PRIORITY_IDLE,                         // 0  Entry should never be used
aoqi@0:   THREAD_PRIORITY_LOWEST,                       // 1  MinPriority
aoqi@0:   THREAD_PRIORITY_LOWEST,                       // 2
aoqi@0:   THREAD_PRIORITY_BELOW_NORMAL,                 // 3
aoqi@0:   THREAD_PRIORITY_BELOW_NORMAL,                 // 4
aoqi@0:   THREAD_PRIORITY_NORMAL,                       // 5  NormPriority
aoqi@0:   THREAD_PRIORITY_NORMAL,                       // 6
aoqi@0:   THREAD_PRIORITY_ABOVE_NORMAL,                 // 7
aoqi@0:   THREAD_PRIORITY_ABOVE_NORMAL,                 // 8
aoqi@0:   THREAD_PRIORITY_HIGHEST,                      // 9  NearMaxPriority
aoqi@0:   THREAD_PRIORITY_HIGHEST,                      // 10 MaxPriority
aoqi@0:   THREAD_PRIORITY_HIGHEST                       // 11 CriticalPriority
aoqi@0: };
aoqi@0: 
aoqi@0: int prio_policy1[CriticalPriority + 1] = {
aoqi@0:   THREAD_PRIORITY_IDLE,                         // 0  Entry should never be used
aoqi@0:   THREAD_PRIORITY_LOWEST,                       // 1  MinPriority
aoqi@0:   THREAD_PRIORITY_LOWEST,                       // 2
aoqi@0:   THREAD_PRIORITY_BELOW_NORMAL,                 // 3
aoqi@0:   THREAD_PRIORITY_BELOW_NORMAL,                 // 4
aoqi@0:   THREAD_PRIORITY_NORMAL,                       // 5  NormPriority
aoqi@0:   THREAD_PRIORITY_ABOVE_NORMAL,                 // 6
aoqi@0:   THREAD_PRIORITY_ABOVE_NORMAL,                 // 7
aoqi@0:   THREAD_PRIORITY_HIGHEST,                      // 8
aoqi@0:   THREAD_PRIORITY_HIGHEST,                      // 9  NearMaxPriority
aoqi@0:   THREAD_PRIORITY_TIME_CRITICAL,                // 10 MaxPriority
aoqi@0:   THREAD_PRIORITY_TIME_CRITICAL                 // 11 CriticalPriority
aoqi@0: };
aoqi@0: 
aoqi@0: static int prio_init() {
aoqi@0:   // If ThreadPriorityPolicy is 1, switch tables
aoqi@0:   if (ThreadPriorityPolicy == 1) {
aoqi@0:     int i;
aoqi@0:     for (i = 0; i < CriticalPriority + 1; i++) {
aoqi@0:       os::java_to_os_priority[i] = prio_policy1[i];
aoqi@0:     }
aoqi@0:   }
aoqi@0:   if (UseCriticalJavaThreadPriority) {
aoqi@0:     os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority] ;
aoqi@0:   }
aoqi@0:   return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: OSReturn os::set_native_priority(Thread* thread, int priority) {
aoqi@0:   if (!UseThreadPriorities) return OS_OK;
aoqi@0:   bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0;
aoqi@0:   return ret ? OS_OK : OS_ERR;
aoqi@0: }
aoqi@0: 
aoqi@0: OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) {
aoqi@0:   if ( !UseThreadPriorities ) {
aoqi@0:     *priority_ptr = java_to_os_priority[NormPriority];
aoqi@0:     return OS_OK;
aoqi@0:   }
aoqi@0:   int os_prio = GetThreadPriority(thread->osthread()->thread_handle());
aoqi@0:   if (os_prio == THREAD_PRIORITY_ERROR_RETURN) {
aoqi@0:     assert(false, "GetThreadPriority failed");
aoqi@0:     return OS_ERR;
aoqi@0:   }
aoqi@0:   *priority_ptr = os_prio;
aoqi@0:   return OS_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Hint to the underlying OS that a task switch would not be good.
aoqi@0: // Void return because it's a hint and can fail.
aoqi@0: void os::hint_no_preempt() {}
aoqi@0: 
aoqi@0: void os::interrupt(Thread* thread) {
aoqi@0:   assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
aoqi@0:          "possibility of dangling Thread pointer");
aoqi@0: 
aoqi@0:   OSThread* osthread = thread->osthread();
aoqi@0:   osthread->set_interrupted(true);
aoqi@0:   // More than one thread can get here with the same value of osthread,
aoqi@0:   // resulting in multiple notifications.  We do, however, want the store
aoqi@0:   // to interrupted() to be visible to other threads before we post
aoqi@0:   // the interrupt event.
aoqi@0:   OrderAccess::release();
aoqi@0:   SetEvent(osthread->interrupt_event());
aoqi@0:   // For JSR166:  unpark after setting status
aoqi@0:   if (thread->is_Java_thread())
aoqi@0:     ((JavaThread*)thread)->parker()->unpark();
aoqi@0: 
aoqi@0:   ParkEvent * ev = thread->_ParkEvent ;
aoqi@0:   if (ev != NULL) ev->unpark() ;
aoqi@0: 
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: bool os::is_interrupted(Thread* thread, bool clear_interrupted) {
aoqi@0:   assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(),
aoqi@0:          "possibility of dangling Thread pointer");
aoqi@0: 
aoqi@0:   OSThread* osthread = thread->osthread();
aoqi@0:   // There is no synchronization between the setting of the interrupt
aoqi@0:   // and it being cleared here. It is critical - see 6535709 - that
aoqi@0:   // we only clear the interrupt state, and reset the interrupt event,
aoqi@0:   // if we are going to report that we were indeed interrupted - else
aoqi@0:   // an interrupt can be "lost", leading to spurious wakeups or lost wakeups
aoqi@0:   // depending on the timing. By checking thread interrupt event to see
aoqi@0:   // if the thread gets real interrupt thus prevent spurious wakeup.
aoqi@0:   bool interrupted = osthread->interrupted() && (WaitForSingleObject(osthread->interrupt_event(), 0) == WAIT_OBJECT_0);
aoqi@0:   if (interrupted && clear_interrupted) {
aoqi@0:     osthread->set_interrupted(false);
aoqi@0:     ResetEvent(osthread->interrupt_event());
aoqi@0:   } // Otherwise leave the interrupted state alone
aoqi@0: 
aoqi@0:   return interrupted;
aoqi@0: }
aoqi@0: 
aoqi@0: // Get's a pc (hint) for a running thread. Currently used only for profiling.
aoqi@0: ExtendedPC os::get_thread_pc(Thread* thread) {
aoqi@0:   CONTEXT context;
aoqi@0:   context.ContextFlags = CONTEXT_CONTROL;
aoqi@0:   HANDLE handle = thread->osthread()->thread_handle();
aoqi@0: #ifdef _M_IA64
aoqi@0:   assert(0, "Fix get_thread_pc");
aoqi@0:   return ExtendedPC(NULL);
aoqi@0: #else
aoqi@0:   if (GetThreadContext(handle, &context)) {
aoqi@0: #ifdef _M_AMD64
aoqi@0:     return ExtendedPC((address) context.Rip);
aoqi@0: #else
aoqi@0:     return ExtendedPC((address) context.Eip);
aoqi@0: #endif
aoqi@0:   } else {
aoqi@0:     return ExtendedPC(NULL);
aoqi@0:   }
aoqi@0: #endif
aoqi@0: }
aoqi@0: 
aoqi@0: // GetCurrentThreadId() returns DWORD
aoqi@0: intx os::current_thread_id()          { return GetCurrentThreadId(); }
aoqi@0: 
aoqi@0: static int _initial_pid = 0;
aoqi@0: 
aoqi@0: int os::current_process_id()
aoqi@0: {
aoqi@0:   return (_initial_pid ? _initial_pid : _getpid());
aoqi@0: }
aoqi@0: 
aoqi@0: int    os::win32::_vm_page_size       = 0;
aoqi@0: int    os::win32::_vm_allocation_granularity = 0;
aoqi@0: int    os::win32::_processor_type     = 0;
aoqi@0: // Processor level is not available on non-NT systems, use vm_version instead
aoqi@0: int    os::win32::_processor_level    = 0;
aoqi@0: julong os::win32::_physical_memory    = 0;
aoqi@0: size_t os::win32::_default_stack_size = 0;
aoqi@0: 
aoqi@0:          intx os::win32::_os_thread_limit    = 0;
aoqi@0: volatile intx os::win32::_os_thread_count    = 0;
aoqi@0: 
aoqi@0: bool   os::win32::_is_nt              = false;
aoqi@0: bool   os::win32::_is_windows_2003    = false;
aoqi@0: bool   os::win32::_is_windows_server  = false;
aoqi@0: 
aoqi@0: void os::win32::initialize_system_info() {
aoqi@0:   SYSTEM_INFO si;
aoqi@0:   GetSystemInfo(&si);
aoqi@0:   _vm_page_size    = si.dwPageSize;
aoqi@0:   _vm_allocation_granularity = si.dwAllocationGranularity;
aoqi@0:   _processor_type  = si.dwProcessorType;
aoqi@0:   _processor_level = si.wProcessorLevel;
aoqi@0:   set_processor_count(si.dwNumberOfProcessors);
aoqi@0: 
aoqi@0:   MEMORYSTATUSEX ms;
aoqi@0:   ms.dwLength = sizeof(ms);
aoqi@0: 
aoqi@0:   // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual,
aoqi@0:   // dwMemoryLoad (% of memory in use)
aoqi@0:   GlobalMemoryStatusEx(&ms);
aoqi@0:   _physical_memory = ms.ullTotalPhys;
aoqi@0: 
aoqi@0:   OSVERSIONINFOEX oi;
aoqi@0:   oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
aoqi@0:   GetVersionEx((OSVERSIONINFO*)&oi);
aoqi@0:   switch(oi.dwPlatformId) {
aoqi@0:     case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break;
aoqi@0:     case VER_PLATFORM_WIN32_NT:
aoqi@0:       _is_nt = true;
aoqi@0:       {
aoqi@0:         int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion;
aoqi@0:         if (os_vers == 5002) {
aoqi@0:           _is_windows_2003 = true;
aoqi@0:         }
aoqi@0:         if (oi.wProductType == VER_NT_DOMAIN_CONTROLLER ||
aoqi@0:           oi.wProductType == VER_NT_SERVER) {
aoqi@0:             _is_windows_server = true;
aoqi@0:         }
aoqi@0:       }
aoqi@0:       break;
aoqi@0:     default: fatal("Unknown platform");
aoqi@0:   }
aoqi@0: 
aoqi@0:   _default_stack_size = os::current_stack_size();
aoqi@0:   assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size");
aoqi@0:   assert((_default_stack_size & (_vm_page_size - 1)) == 0,
aoqi@0:     "stack size not a multiple of page size");
aoqi@0: 
aoqi@0:   initialize_performance_counter();
aoqi@0: 
aoqi@0:   // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is
aoqi@0:   // known to deadlock the system, if the VM issues to thread operations with
aoqi@0:   // a too high frequency, e.g., such as changing the priorities.
aoqi@0:   // The 6000 seems to work well - no deadlocks has been notices on the test
aoqi@0:   // programs that we have seen experience this problem.
aoqi@0:   if (!os::win32::is_nt()) {
aoqi@0:     StarvationMonitorInterval = 6000;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: HINSTANCE os::win32::load_Windows_dll(const char* name, char *ebuf, int ebuflen) {
aoqi@0:   char path[MAX_PATH];
aoqi@0:   DWORD size;
aoqi@0:   DWORD pathLen = (DWORD)sizeof(path);
aoqi@0:   HINSTANCE result = NULL;
aoqi@0: 
aoqi@0:   // only allow library name without path component
aoqi@0:   assert(strchr(name, '\\') == NULL, "path not allowed");
aoqi@0:   assert(strchr(name, ':') == NULL, "path not allowed");
aoqi@0:   if (strchr(name, '\\') != NULL || strchr(name, ':') != NULL) {
aoqi@0:     jio_snprintf(ebuf, ebuflen,
aoqi@0:       "Invalid parameter while calling os::win32::load_windows_dll(): cannot take path: %s", name);
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // search system directory
aoqi@0:   if ((size = GetSystemDirectory(path, pathLen)) > 0) {
aoqi@0:     strcat(path, "\\");
aoqi@0:     strcat(path, name);
aoqi@0:     if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
aoqi@0:       return result;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // try Windows directory
aoqi@0:   if ((size = GetWindowsDirectory(path, pathLen)) > 0) {
aoqi@0:     strcat(path, "\\");
aoqi@0:     strcat(path, name);
aoqi@0:     if ((result = (HINSTANCE)os::dll_load(path, ebuf, ebuflen)) != NULL) {
aoqi@0:       return result;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   jio_snprintf(ebuf, ebuflen,
aoqi@0:     "os::win32::load_windows_dll() cannot load %s from system directories.", name);
aoqi@0:   return NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::win32::setmode_streams() {
aoqi@0:   _setmode(_fileno(stdin), _O_BINARY);
aoqi@0:   _setmode(_fileno(stdout), _O_BINARY);
aoqi@0:   _setmode(_fileno(stderr), _O_BINARY);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: bool os::is_debugger_attached() {
aoqi@0:   return IsDebuggerPresent() ? true : false;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void os::wait_for_keypress_at_exit(void) {
aoqi@0:   if (PauseAtExit) {
aoqi@0:     fprintf(stderr, "Press any key to continue...\n");
aoqi@0:     fgetc(stdin);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: int os::message_box(const char* title, const char* message) {
aoqi@0:   int result = MessageBox(NULL, message, title,
aoqi@0:                           MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY);
aoqi@0:   return result == IDYES;
aoqi@0: }
aoqi@0: 
aoqi@0: int os::allocate_thread_local_storage() {
aoqi@0:   return TlsAlloc();
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void os::free_thread_local_storage(int index) {
aoqi@0:   TlsFree(index);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void os::thread_local_storage_at_put(int index, void* value) {
aoqi@0:   TlsSetValue(index, value);
aoqi@0:   assert(thread_local_storage_at(index) == value, "Just checking");
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void* os::thread_local_storage_at(int index) {
aoqi@0:   return TlsGetValue(index);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0: #ifndef _WIN64
aoqi@0: // Helpers to check whether NX protection is enabled
aoqi@0: int nx_exception_filter(_EXCEPTION_POINTERS *pex) {
aoqi@0:   if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
aoqi@0:       pex->ExceptionRecord->NumberParameters > 0 &&
aoqi@0:       pex->ExceptionRecord->ExceptionInformation[0] ==
aoqi@0:       EXCEPTION_INFO_EXEC_VIOLATION) {
aoqi@0:     return EXCEPTION_EXECUTE_HANDLER;
aoqi@0:   }
aoqi@0:   return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: }
aoqi@0: 
aoqi@0: void nx_check_protection() {
aoqi@0:   // If NX is enabled we'll get an exception calling into code on the stack
aoqi@0:   char code[] = { (char)0xC3 }; // ret
aoqi@0:   void *code_ptr = (void *)code;
aoqi@0:   __try {
aoqi@0:     __asm call code_ptr
aoqi@0:   } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) {
aoqi@0:     tty->print_raw_cr("NX protection detected.");
aoqi@0:   }
aoqi@0: }
aoqi@0: #endif // _WIN64
aoqi@0: #endif // PRODUCT
aoqi@0: 
aoqi@0: // this is called _before_ the global arguments have been parsed
aoqi@0: void os::init(void) {
aoqi@0:   _initial_pid = _getpid();
aoqi@0: 
aoqi@0:   init_random(1234567);
aoqi@0: 
aoqi@0:   win32::initialize_system_info();
aoqi@0:   win32::setmode_streams();
aoqi@0:   init_page_sizes((size_t) win32::vm_page_size());
aoqi@0: 
aoqi@0:   // For better scalability on MP systems (must be called after initialize_system_info)
aoqi@0: #ifndef PRODUCT
aoqi@0:   if (is_MP()) {
aoqi@0:     NoYieldsInMicrolock = true;
aoqi@0:   }
aoqi@0: #endif
aoqi@0:   // This may be overridden later when argument processing is done.
aoqi@0:   FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation,
aoqi@0:     os::win32::is_windows_2003());
aoqi@0: 
aoqi@0:   // Initialize main_process and main_thread
aoqi@0:   main_process = GetCurrentProcess();  // Remember main_process is a pseudo handle
aoqi@0:  if (!DuplicateHandle(main_process, GetCurrentThread(), main_process,
aoqi@0:                        &main_thread, THREAD_ALL_ACCESS, false, 0)) {
aoqi@0:     fatal("DuplicateHandle failed\n");
aoqi@0:   }
aoqi@0:   main_thread_id = (int) GetCurrentThreadId();
aoqi@0: }
aoqi@0: 
aoqi@0: // To install functions for atexit processing
aoqi@0: extern "C" {
aoqi@0:   static void perfMemory_exit_helper() {
aoqi@0:     perfMemory_exit();
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: static jint initSock();
aoqi@0: 
aoqi@0: // this is called _after_ the global arguments have been parsed
aoqi@0: jint os::init_2(void) {
aoqi@0:   // Allocate a single page and mark it as readable for safepoint polling
aoqi@0:   address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY);
aoqi@0:   guarantee( polling_page != NULL, "Reserve Failed for polling page");
aoqi@0: 
aoqi@0:   address return_page  = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY);
aoqi@0:   guarantee( return_page != NULL, "Commit Failed for polling page");
aoqi@0: 
aoqi@0:   os::set_polling_page( polling_page );
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:   if( Verbose && PrintMiscellaneous )
aoqi@0:     tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page);
aoqi@0: #endif
aoqi@0: 
aoqi@0:   if (!UseMembar) {
aoqi@0:     address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
aoqi@0:     guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
aoqi@0: 
aoqi@0:     return_page  = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
aoqi@0:     guarantee( return_page != NULL, "Commit Failed for memory serialize page");
aoqi@0: 
aoqi@0:     os::set_memory_serialize_page( mem_serialize_page );
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:     if(Verbose && PrintMiscellaneous)
aoqi@0:       tty->print("[Memory Serialize  Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page);
aoqi@0: #endif
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Setup Windows Exceptions
aoqi@0: 
aoqi@0:   // for debugging float code generation bugs
aoqi@0:   if (ForceFloatExceptions) {
aoqi@0: #ifndef  _WIN64
aoqi@0:     static long fp_control_word = 0;
aoqi@0:     __asm { fstcw fp_control_word }
aoqi@0:     // see Intel PPro Manual, Vol. 2, p 7-16
aoqi@0:     const long precision = 0x20;
aoqi@0:     const long underflow = 0x10;
aoqi@0:     const long overflow  = 0x08;
aoqi@0:     const long zero_div  = 0x04;
aoqi@0:     const long denorm    = 0x02;
aoqi@0:     const long invalid   = 0x01;
aoqi@0:     fp_control_word |= invalid;
aoqi@0:     __asm { fldcw fp_control_word }
aoqi@0: #endif
aoqi@0:   }
aoqi@0: 
aoqi@0:   // If stack_commit_size is 0, windows will reserve the default size,
aoqi@0:   // but only commit a small portion of it.
aoqi@0:   size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size());
aoqi@0:   size_t default_reserve_size = os::win32::default_stack_size();
aoqi@0:   size_t actual_reserve_size = stack_commit_size;
aoqi@0:   if (stack_commit_size < default_reserve_size) {
aoqi@0:     // If stack_commit_size == 0, we want this too
aoqi@0:     actual_reserve_size = default_reserve_size;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Check minimum allowable stack size for thread creation and to initialize
aoqi@0:   // the java system classes, including StackOverflowError - depends on page
aoqi@0:   // size.  Add a page for compiler2 recursion in main thread.
aoqi@0:   // Add in 2*BytesPerWord times page size to account for VM stack during
aoqi@0:   // class initialization depending on 32 or 64 bit VM.
aoqi@0:   size_t min_stack_allowed =
aoqi@0:             (size_t)(StackYellowPages+StackRedPages+StackShadowPages+
aoqi@0:             2*BytesPerWord COMPILER2_PRESENT(+1)) * os::vm_page_size();
aoqi@0:   if (actual_reserve_size < min_stack_allowed) {
aoqi@0:     tty->print_cr("\nThe stack size specified is too small, "
aoqi@0:                   "Specify at least %dk",
aoqi@0:                   min_stack_allowed / K);
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0: 
aoqi@0:   JavaThread::set_stack_size_at_create(stack_commit_size);
aoqi@0: 
aoqi@0:   // Calculate theoretical max. size of Threads to guard gainst artifical
aoqi@0:   // out-of-memory situations, where all available address-space has been
aoqi@0:   // reserved by thread stacks.
aoqi@0:   assert(actual_reserve_size != 0, "Must have a stack");
aoqi@0: 
aoqi@0:   // Calculate the thread limit when we should start doing Virtual Memory
aoqi@0:   // banging. Currently when the threads will have used all but 200Mb of space.
aoqi@0:   //
aoqi@0:   // TODO: consider performing a similar calculation for commit size instead
aoqi@0:   // as reserve size, since on a 64-bit platform we'll run into that more
aoqi@0:   // often than running out of virtual memory space.  We can use the
aoqi@0:   // lower value of the two calculations as the os_thread_limit.
aoqi@0:   size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K);
aoqi@0:   win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size);
aoqi@0: 
aoqi@0:   // at exit methods are called in the reverse order of their registration.
aoqi@0:   // there is no limit to the number of functions registered. atexit does
aoqi@0:   // not set errno.
aoqi@0: 
aoqi@0:   if (PerfAllowAtExitRegistration) {
aoqi@0:     // only register atexit functions if PerfAllowAtExitRegistration is set.
aoqi@0:     // atexit functions can be delayed until process exit time, which
aoqi@0:     // can be problematic for embedded VM situations. Embedded VMs should
aoqi@0:     // call DestroyJavaVM() to assure that VM resources are released.
aoqi@0: 
aoqi@0:     // note: perfMemory_exit_helper atexit function may be removed in
aoqi@0:     // the future if the appropriate cleanup code can be added to the
aoqi@0:     // VM_Exit VMOperation's doit method.
aoqi@0:     if (atexit(perfMemory_exit_helper) != 0) {
aoqi@0:       warning("os::init_2 atexit(perfMemory_exit_helper) failed");
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0: #ifndef _WIN64
aoqi@0:   // Print something if NX is enabled (win32 on AMD64)
aoqi@0:   NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection());
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // initialize thread priority policy
aoqi@0:   prio_init();
aoqi@0: 
aoqi@0:   if (UseNUMA && !ForceNUMA) {
aoqi@0:     UseNUMA = false; // We don't fully support this yet
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (UseNUMAInterleaving) {
aoqi@0:     // first check whether this Windows OS supports VirtualAllocExNuma, if not ignore this flag
aoqi@0:     bool success = numa_interleaving_init();
aoqi@0:     if (!success) UseNUMAInterleaving = false;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (initSock() != JNI_OK) {
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0: 
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::init_3(void) {
aoqi@0:   return;
aoqi@0: }
aoqi@0: 
aoqi@0: // Mark the polling page as unreadable
aoqi@0: void os::make_polling_page_unreadable(void) {
aoqi@0:   DWORD old_status;
aoqi@0:   if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) )
aoqi@0:     fatal("Could not disable polling page");
aoqi@0: };
aoqi@0: 
aoqi@0: // Mark the polling page as readable
aoqi@0: void os::make_polling_page_readable(void) {
aoqi@0:   DWORD old_status;
aoqi@0:   if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) )
aoqi@0:     fatal("Could not enable polling page");
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: int os::stat(const char *path, struct stat *sbuf) {
aoqi@0:   char pathbuf[MAX_PATH];
aoqi@0:   if (strlen(path) > MAX_PATH - 1) {
aoqi@0:     errno = ENAMETOOLONG;
aoqi@0:     return -1;
aoqi@0:   }
aoqi@0:   os::native_path(strcpy(pathbuf, path));
aoqi@0:   int ret = ::stat(pathbuf, sbuf);
aoqi@0:   if (sbuf != NULL && UseUTCFileTimestamp) {
aoqi@0:     // Fix for 6539723.  st_mtime returned from stat() is dependent on
aoqi@0:     // the system timezone and so can return different values for the
aoqi@0:     // same file if/when daylight savings time changes.  This adjustment
aoqi@0:     // makes sure the same timestamp is returned regardless of the TZ.
aoqi@0:     //
aoqi@0:     // See:
aoqi@0:     // http://msdn.microsoft.com/library/
aoqi@0:     //   default.asp?url=/library/en-us/sysinfo/base/
aoqi@0:     //   time_zone_information_str.asp
aoqi@0:     // and
aoqi@0:     // http://msdn.microsoft.com/library/default.asp?url=
aoqi@0:     //   /library/en-us/sysinfo/base/settimezoneinformation.asp
aoqi@0:     //
aoqi@0:     // NOTE: there is a insidious bug here:  If the timezone is changed
aoqi@0:     // after the call to stat() but before 'GetTimeZoneInformation()', then
aoqi@0:     // the adjustment we do here will be wrong and we'll return the wrong
aoqi@0:     // value (which will likely end up creating an invalid class data
aoqi@0:     // archive).  Absent a better API for this, or some time zone locking
aoqi@0:     // mechanism, we'll have to live with this risk.
aoqi@0:     TIME_ZONE_INFORMATION tz;
aoqi@0:     DWORD tzid = GetTimeZoneInformation(&tz);
aoqi@0:     int daylightBias =
aoqi@0:       (tzid == TIME_ZONE_ID_DAYLIGHT) ?  tz.DaylightBias : tz.StandardBias;
aoqi@0:     sbuf->st_mtime += (tz.Bias + daylightBias) * 60;
aoqi@0:   }
aoqi@0:   return ret;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: #define FT2INT64(ft) \
aoqi@0:   ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime))
aoqi@0: 
aoqi@0: 
aoqi@0: // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool)
aoqi@0: // are used by JVM M&M and JVMTI to get user+sys or user CPU time
aoqi@0: // of a thread.
aoqi@0: //
aoqi@0: // current_thread_cpu_time() and thread_cpu_time(Thread*) returns
aoqi@0: // the fast estimate available on the platform.
aoqi@0: 
aoqi@0: // current_thread_cpu_time() is not optimized for Windows yet
aoqi@0: jlong os::current_thread_cpu_time() {
aoqi@0:   // return user + sys since the cost is the same
aoqi@0:   return os::thread_cpu_time(Thread::current(), true /* user+sys */);
aoqi@0: }
aoqi@0: 
aoqi@0: jlong os::thread_cpu_time(Thread* thread) {
aoqi@0:   // consistent with what current_thread_cpu_time() returns.
aoqi@0:   return os::thread_cpu_time(thread, true /* user+sys */);
aoqi@0: }
aoqi@0: 
aoqi@0: jlong os::current_thread_cpu_time(bool user_sys_cpu_time) {
aoqi@0:   return os::thread_cpu_time(Thread::current(), user_sys_cpu_time);
aoqi@0: }
aoqi@0: 
aoqi@0: jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) {
aoqi@0:   // This code is copy from clasic VM -> hpi::sysThreadCPUTime
aoqi@0:   // If this function changes, os::is_thread_cpu_time_supported() should too
aoqi@0:   if (os::win32::is_nt()) {
aoqi@0:     FILETIME CreationTime;
aoqi@0:     FILETIME ExitTime;
aoqi@0:     FILETIME KernelTime;
aoqi@0:     FILETIME UserTime;
aoqi@0: 
aoqi@0:     if ( GetThreadTimes(thread->osthread()->thread_handle(),
aoqi@0:                     &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
aoqi@0:       return -1;
aoqi@0:     else
aoqi@0:       if (user_sys_cpu_time) {
aoqi@0:         return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100;
aoqi@0:       } else {
aoqi@0:         return FT2INT64(UserTime) * 100;
aoqi@0:       }
aoqi@0:   } else {
aoqi@0:     return (jlong) timeGetTime() * 1000000;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
aoqi@0:   info_ptr->max_value = ALL_64_BITS;        // the max value -- all 64 bits
aoqi@0:   info_ptr->may_skip_backward = false;      // GetThreadTimes returns absolute time
aoqi@0:   info_ptr->may_skip_forward = false;       // GetThreadTimes returns absolute time
aoqi@0:   info_ptr->kind = JVMTI_TIMER_TOTAL_CPU;   // user+system time is returned
aoqi@0: }
aoqi@0: 
aoqi@0: void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) {
aoqi@0:   info_ptr->max_value = ALL_64_BITS;        // the max value -- all 64 bits
aoqi@0:   info_ptr->may_skip_backward = false;      // GetThreadTimes returns absolute time
aoqi@0:   info_ptr->may_skip_forward = false;       // GetThreadTimes returns absolute time
aoqi@0:   info_ptr->kind = JVMTI_TIMER_TOTAL_CPU;   // user+system time is returned
aoqi@0: }
aoqi@0: 
aoqi@0: bool os::is_thread_cpu_time_supported() {
aoqi@0:   // see os::thread_cpu_time
aoqi@0:   if (os::win32::is_nt()) {
aoqi@0:     FILETIME CreationTime;
aoqi@0:     FILETIME ExitTime;
aoqi@0:     FILETIME KernelTime;
aoqi@0:     FILETIME UserTime;
aoqi@0: 
aoqi@0:     if ( GetThreadTimes(GetCurrentThread(),
aoqi@0:                     &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0)
aoqi@0:       return false;
aoqi@0:     else
aoqi@0:       return true;
aoqi@0:   } else {
aoqi@0:     return false;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // Windows does't provide a loadavg primitive so this is stubbed out for now.
aoqi@0: // It does have primitives (PDH API) to get CPU usage and run queue length.
aoqi@0: // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length"
aoqi@0: // If we wanted to implement loadavg on Windows, we have a few options:
aoqi@0: //
aoqi@0: // a) Query CPU usage and run queue length and "fake" an answer by
aoqi@0: //    returning the CPU usage if it's under 100%, and the run queue
aoqi@0: //    length otherwise.  It turns out that querying is pretty slow
aoqi@0: //    on Windows, on the order of 200 microseconds on a fast machine.
aoqi@0: //    Note that on the Windows the CPU usage value is the % usage
aoqi@0: //    since the last time the API was called (and the first call
aoqi@0: //    returns 100%), so we'd have to deal with that as well.
aoqi@0: //
aoqi@0: // b) Sample the "fake" answer using a sampling thread and store
aoqi@0: //    the answer in a global variable.  The call to loadavg would
aoqi@0: //    just return the value of the global, avoiding the slow query.
aoqi@0: //
aoqi@0: // c) Sample a better answer using exponential decay to smooth the
aoqi@0: //    value.  This is basically the algorithm used by UNIX kernels.
aoqi@0: //
aoqi@0: // Note that sampling thread starvation could affect both (b) and (c).
aoqi@0: int os::loadavg(double loadavg[], int nelem) {
aoqi@0:   return -1;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield()
aoqi@0: bool os::dont_yield() {
aoqi@0:   return DontYieldALot;
aoqi@0: }
aoqi@0: 
aoqi@0: // This method is a slightly reworked copy of JDK's sysOpen
aoqi@0: // from src/windows/hpi/src/sys_api_md.c
aoqi@0: 
aoqi@0: int os::open(const char *path, int oflag, int mode) {
aoqi@0:   char pathbuf[MAX_PATH];
aoqi@0: 
aoqi@0:   if (strlen(path) > MAX_PATH - 1) {
aoqi@0:     errno = ENAMETOOLONG;
aoqi@0:           return -1;
aoqi@0:   }
aoqi@0:   os::native_path(strcpy(pathbuf, path));
aoqi@0:   return ::open(pathbuf, oflag | O_BINARY | O_NOINHERIT, mode);
aoqi@0: }
aoqi@0: 
aoqi@0: FILE* os::open(int fd, const char* mode) {
aoqi@0:   return ::_fdopen(fd, mode);
aoqi@0: }
aoqi@0: 
aoqi@0: // Is a (classpath) directory empty?
aoqi@0: bool os::dir_is_empty(const char* path) {
aoqi@0:   WIN32_FIND_DATA fd;
aoqi@0:   HANDLE f = FindFirstFile(path, &fd);
aoqi@0:   if (f == INVALID_HANDLE_VALUE) {
aoqi@0:     return true;
aoqi@0:   }
aoqi@0:   FindClose(f);
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: // create binary file, rewriting existing file if required
aoqi@0: int os::create_binary_file(const char* path, bool rewrite_existing) {
aoqi@0:   int oflags = _O_CREAT | _O_WRONLY | _O_BINARY;
aoqi@0:   if (!rewrite_existing) {
aoqi@0:     oflags |= _O_EXCL;
aoqi@0:   }
aoqi@0:   return ::open(path, oflags, _S_IREAD | _S_IWRITE);
aoqi@0: }
aoqi@0: 
aoqi@0: // return current position of file pointer
aoqi@0: jlong os::current_file_offset(int fd) {
aoqi@0:   return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR);
aoqi@0: }
aoqi@0: 
aoqi@0: // move file pointer to the specified offset
aoqi@0: jlong os::seek_to_file_offset(int fd, jlong offset) {
aoqi@0:   return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: jlong os::lseek(int fd, jlong offset, int whence) {
aoqi@0:   return (jlong) ::_lseeki64(fd, offset, whence);
aoqi@0: }
aoqi@0: 
aoqi@0: // This method is a slightly reworked copy of JDK's sysNativePath
aoqi@0: // from src/windows/hpi/src/path_md.c
aoqi@0: 
aoqi@0: /* Convert a pathname to native format.  On win32, this involves forcing all
aoqi@0:    separators to be '\\' rather than '/' (both are legal inputs, but Win95
aoqi@0:    sometimes rejects '/') and removing redundant separators.  The input path is
aoqi@0:    assumed to have been converted into the character encoding used by the local
aoqi@0:    system.  Because this might be a double-byte encoding, care is taken to
aoqi@0:    treat double-byte lead characters correctly.
aoqi@0: 
aoqi@0:    This procedure modifies the given path in place, as the result is never
aoqi@0:    longer than the original.  There is no error return; this operation always
aoqi@0:    succeeds. */
aoqi@0: char * os::native_path(char *path) {
aoqi@0:   char *src = path, *dst = path, *end = path;
aoqi@0:   char *colon = NULL;           /* If a drive specifier is found, this will
aoqi@0:                                         point to the colon following the drive
aoqi@0:                                         letter */
aoqi@0: 
aoqi@0:   /* Assumption: '/', '\\', ':', and drive letters are never lead bytes */
aoqi@0:   assert(((!::IsDBCSLeadByte('/'))
aoqi@0:     && (!::IsDBCSLeadByte('\\'))
aoqi@0:     && (!::IsDBCSLeadByte(':'))),
aoqi@0:     "Illegal lead byte");
aoqi@0: 
aoqi@0:   /* Check for leading separators */
aoqi@0: #define isfilesep(c) ((c) == '/' || (c) == '\\')
aoqi@0:   while (isfilesep(*src)) {
aoqi@0:     src++;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (::isalpha(*src) && !::IsDBCSLeadByte(*src) && src[1] == ':') {
aoqi@0:     /* Remove leading separators if followed by drive specifier.  This
aoqi@0:       hack is necessary to support file URLs containing drive
aoqi@0:       specifiers (e.g., "file://c:/path").  As a side effect,
aoqi@0:       "/c:/path" can be used as an alternative to "c:/path". */
aoqi@0:     *dst++ = *src++;
aoqi@0:     colon = dst;
aoqi@0:     *dst++ = ':';
aoqi@0:     src++;
aoqi@0:   } else {
aoqi@0:     src = path;
aoqi@0:     if (isfilesep(src[0]) && isfilesep(src[1])) {
aoqi@0:       /* UNC pathname: Retain first separator; leave src pointed at
aoqi@0:          second separator so that further separators will be collapsed
aoqi@0:          into the second separator.  The result will be a pathname
aoqi@0:          beginning with "\\\\" followed (most likely) by a host name. */
aoqi@0:       src = dst = path + 1;
aoqi@0:       path[0] = '\\';     /* Force first separator to '\\' */
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   end = dst;
aoqi@0: 
aoqi@0:   /* Remove redundant separators from remainder of path, forcing all
aoqi@0:       separators to be '\\' rather than '/'. Also, single byte space
aoqi@0:       characters are removed from the end of the path because those
aoqi@0:       are not legal ending characters on this operating system.
aoqi@0:   */
aoqi@0:   while (*src != '\0') {
aoqi@0:     if (isfilesep(*src)) {
aoqi@0:       *dst++ = '\\'; src++;
aoqi@0:       while (isfilesep(*src)) src++;
aoqi@0:       if (*src == '\0') {
aoqi@0:         /* Check for trailing separator */
aoqi@0:         end = dst;
aoqi@0:         if (colon == dst - 2) break;                      /* "z:\\" */
aoqi@0:         if (dst == path + 1) break;                       /* "\\" */
aoqi@0:         if (dst == path + 2 && isfilesep(path[0])) {
aoqi@0:           /* "\\\\" is not collapsed to "\\" because "\\\\" marks the
aoqi@0:             beginning of a UNC pathname.  Even though it is not, by
aoqi@0:             itself, a valid UNC pathname, we leave it as is in order
aoqi@0:             to be consistent with the path canonicalizer as well
aoqi@0:             as the win32 APIs, which treat this case as an invalid
aoqi@0:             UNC pathname rather than as an alias for the root
aoqi@0:             directory of the current drive. */
aoqi@0:           break;
aoqi@0:         }
aoqi@0:         end = --dst;  /* Path does not denote a root directory, so
aoqi@0:                                     remove trailing separator */
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       end = dst;
aoqi@0:     } else {
aoqi@0:       if (::IsDBCSLeadByte(*src)) { /* Copy a double-byte character */
aoqi@0:         *dst++ = *src++;
aoqi@0:         if (*src) *dst++ = *src++;
aoqi@0:         end = dst;
aoqi@0:       } else {         /* Copy a single-byte character */
aoqi@0:         char c = *src++;
aoqi@0:         *dst++ = c;
aoqi@0:         /* Space is not a legal ending character */
aoqi@0:         if (c != ' ') end = dst;
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   *end = '\0';
aoqi@0: 
aoqi@0:   /* For "z:", add "." to work around a bug in the C runtime library */
aoqi@0:   if (colon == dst - 1) {
aoqi@0:           path[2] = '.';
aoqi@0:           path[3] = '\0';
aoqi@0:   }
aoqi@0: 
aoqi@0:   return path;
aoqi@0: }
aoqi@0: 
aoqi@0: // This code is a copy of JDK's sysSetLength
aoqi@0: // from src/windows/hpi/src/sys_api_md.c
aoqi@0: 
aoqi@0: int os::ftruncate(int fd, jlong length) {
aoqi@0:   HANDLE h = (HANDLE)::_get_osfhandle(fd);
aoqi@0:   long high = (long)(length >> 32);
aoqi@0:   DWORD ret;
aoqi@0: 
aoqi@0:   if (h == (HANDLE)(-1)) {
aoqi@0:     return -1;
aoqi@0:   }
aoqi@0: 
aoqi@0:   ret = ::SetFilePointer(h, (long)(length), &high, FILE_BEGIN);
aoqi@0:   if ((ret == 0xFFFFFFFF) && (::GetLastError() != NO_ERROR)) {
aoqi@0:       return -1;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (::SetEndOfFile(h) == FALSE) {
aoqi@0:     return -1;
aoqi@0:   }
aoqi@0: 
aoqi@0:   return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // This code is a copy of JDK's sysSync
aoqi@0: // from src/windows/hpi/src/sys_api_md.c
aoqi@0: // except for the legacy workaround for a bug in Win 98
aoqi@0: 
aoqi@0: int os::fsync(int fd) {
aoqi@0:   HANDLE handle = (HANDLE)::_get_osfhandle(fd);
aoqi@0: 
aoqi@0:   if ( (!::FlushFileBuffers(handle)) &&
aoqi@0:          (GetLastError() != ERROR_ACCESS_DENIED) ) {
aoqi@0:     /* from winerror.h */
aoqi@0:     return -1;
aoqi@0:   }
aoqi@0:   return 0;
aoqi@0: }
aoqi@0: 
aoqi@0: static int nonSeekAvailable(int, long *);
aoqi@0: static int stdinAvailable(int, long *);
aoqi@0: 
aoqi@0: #define S_ISCHR(mode)   (((mode) & _S_IFCHR) == _S_IFCHR)
aoqi@0: #define S_ISFIFO(mode)  (((mode) & _S_IFIFO) == _S_IFIFO)
aoqi@0: 
aoqi@0: // This code is a copy of JDK's sysAvailable
aoqi@0: // from src/windows/hpi/src/sys_api_md.c
aoqi@0: 
aoqi@0: int os::available(int fd, jlong *bytes) {
aoqi@0:   jlong cur, end;
aoqi@0:   struct _stati64 stbuf64;
aoqi@0: 
aoqi@0:   if (::_fstati64(fd, &stbuf64) >= 0) {
aoqi@0:     int mode = stbuf64.st_mode;
aoqi@0:     if (S_ISCHR(mode) || S_ISFIFO(mode)) {
aoqi@0:       int ret;
aoqi@0:       long lpbytes;
aoqi@0:       if (fd == 0) {
aoqi@0:         ret = stdinAvailable(fd, &lpbytes);
aoqi@0:       } else {
aoqi@0:         ret = nonSeekAvailable(fd, &lpbytes);
aoqi@0:       }
aoqi@0:       (*bytes) = (jlong)(lpbytes);
aoqi@0:       return ret;
aoqi@0:     }
aoqi@0:     if ((cur = ::_lseeki64(fd, 0L, SEEK_CUR)) == -1) {
aoqi@0:       return FALSE;
aoqi@0:     } else if ((end = ::_lseeki64(fd, 0L, SEEK_END)) == -1) {
aoqi@0:       return FALSE;
aoqi@0:     } else if (::_lseeki64(fd, cur, SEEK_SET) == -1) {
aoqi@0:       return FALSE;
aoqi@0:     }
aoqi@0:     *bytes = end - cur;
aoqi@0:     return TRUE;
aoqi@0:   } else {
aoqi@0:     return FALSE;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // This code is a copy of JDK's nonSeekAvailable
aoqi@0: // from src/windows/hpi/src/sys_api_md.c
aoqi@0: 
aoqi@0: static int nonSeekAvailable(int fd, long *pbytes) {
aoqi@0:   /* This is used for available on non-seekable devices
aoqi@0:     * (like both named and anonymous pipes, such as pipes
aoqi@0:     *  connected to an exec'd process).
aoqi@0:     * Standard Input is a special case.
aoqi@0:     *
aoqi@0:     */
aoqi@0:   HANDLE han;
aoqi@0: 
aoqi@0:   if ((han = (HANDLE) ::_get_osfhandle(fd)) == (HANDLE)(-1)) {
aoqi@0:     return FALSE;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (! ::PeekNamedPipe(han, NULL, 0, NULL, (LPDWORD)pbytes, NULL)) {
aoqi@0:         /* PeekNamedPipe fails when at EOF.  In that case we
aoqi@0:          * simply make *pbytes = 0 which is consistent with the
aoqi@0:          * behavior we get on Solaris when an fd is at EOF.
aoqi@0:          * The only alternative is to raise an Exception,
aoqi@0:          * which isn't really warranted.
aoqi@0:          */
aoqi@0:     if (::GetLastError() != ERROR_BROKEN_PIPE) {
aoqi@0:       return FALSE;
aoqi@0:     }
aoqi@0:     *pbytes = 0;
aoqi@0:   }
aoqi@0:   return TRUE;
aoqi@0: }
aoqi@0: 
aoqi@0: #define MAX_INPUT_EVENTS 2000
aoqi@0: 
aoqi@0: // This code is a copy of JDK's stdinAvailable
aoqi@0: // from src/windows/hpi/src/sys_api_md.c
aoqi@0: 
aoqi@0: static int stdinAvailable(int fd, long *pbytes) {
aoqi@0:   HANDLE han;
aoqi@0:   DWORD numEventsRead = 0;      /* Number of events read from buffer */
aoqi@0:   DWORD numEvents = 0;  /* Number of events in buffer */
aoqi@0:   DWORD i = 0;          /* Loop index */
aoqi@0:   DWORD curLength = 0;  /* Position marker */
aoqi@0:   DWORD actualLength = 0;       /* Number of bytes readable */
aoqi@0:   BOOL error = FALSE;         /* Error holder */
aoqi@0:   INPUT_RECORD *lpBuffer;     /* Pointer to records of input events */
aoqi@0: 
aoqi@0:   if ((han = ::GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {
aoqi@0:         return FALSE;
aoqi@0:   }
aoqi@0: 
aoqi@0:   /* Construct an array of input records in the console buffer */
aoqi@0:   error = ::GetNumberOfConsoleInputEvents(han, &numEvents);
aoqi@0:   if (error == 0) {
aoqi@0:     return nonSeekAvailable(fd, pbytes);
aoqi@0:   }
aoqi@0: 
aoqi@0:   /* lpBuffer must fit into 64K or else PeekConsoleInput fails */
aoqi@0:   if (numEvents > MAX_INPUT_EVENTS) {
aoqi@0:     numEvents = MAX_INPUT_EVENTS;
aoqi@0:   }
aoqi@0: 
aoqi@0:   lpBuffer = (INPUT_RECORD *)os::malloc(numEvents * sizeof(INPUT_RECORD), mtInternal);
aoqi@0:   if (lpBuffer == NULL) {
aoqi@0:     return FALSE;
aoqi@0:   }
aoqi@0: 
aoqi@0:   error = ::PeekConsoleInput(han, lpBuffer, numEvents, &numEventsRead);
aoqi@0:   if (error == 0) {
aoqi@0:     os::free(lpBuffer, mtInternal);
aoqi@0:     return FALSE;
aoqi@0:   }
aoqi@0: 
aoqi@0:   /* Examine input records for the number of bytes available */
aoqi@0:   for(i=0; i<numEvents; i++) {
aoqi@0:     if (lpBuffer[i].EventType == KEY_EVENT) {
aoqi@0: 
aoqi@0:       KEY_EVENT_RECORD *keyRecord = (KEY_EVENT_RECORD *)
aoqi@0:                                       &(lpBuffer[i].Event);
aoqi@0:       if (keyRecord->bKeyDown == TRUE) {
aoqi@0:         CHAR *keyPressed = (CHAR *) &(keyRecord->uChar);
aoqi@0:         curLength++;
aoqi@0:         if (*keyPressed == '\r') {
aoqi@0:           actualLength = curLength;
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if(lpBuffer != NULL) {
aoqi@0:     os::free(lpBuffer, mtInternal);
aoqi@0:   }
aoqi@0: 
aoqi@0:   *pbytes = (long) actualLength;
aoqi@0:   return TRUE;
aoqi@0: }
aoqi@0: 
aoqi@0: // Map a block of memory.
aoqi@0: char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset,
aoqi@0:                      char *addr, size_t bytes, bool read_only,
aoqi@0:                      bool allow_exec) {
aoqi@0:   HANDLE hFile;
aoqi@0:   char* base;
aoqi@0: 
aoqi@0:   hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL,
aoqi@0:                      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
aoqi@0:   if (hFile == NULL) {
aoqi@0:     if (PrintMiscellaneous && Verbose) {
aoqi@0:       DWORD err = GetLastError();
aoqi@0:       tty->print_cr("CreateFile() failed: GetLastError->%ld.", err);
aoqi@0:     }
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (allow_exec) {
aoqi@0:     // CreateFileMapping/MapViewOfFileEx can't map executable memory
aoqi@0:     // unless it comes from a PE image (which the shared archive is not.)
aoqi@0:     // Even VirtualProtect refuses to give execute access to mapped memory
aoqi@0:     // that was not previously executable.
aoqi@0:     //
aoqi@0:     // Instead, stick the executable region in anonymous memory.  Yuck.
aoqi@0:     // Penalty is that ~4 pages will not be shareable - in the future
aoqi@0:     // we might consider DLLizing the shared archive with a proper PE
aoqi@0:     // header so that mapping executable + sharing is possible.
aoqi@0: 
aoqi@0:     base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE,
aoqi@0:                                 PAGE_READWRITE);
aoqi@0:     if (base == NULL) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         DWORD err = GetLastError();
aoqi@0:         tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err);
aoqi@0:       }
aoqi@0:       CloseHandle(hFile);
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0: 
aoqi@0:     DWORD bytes_read;
aoqi@0:     OVERLAPPED overlapped;
aoqi@0:     overlapped.Offset = (DWORD)file_offset;
aoqi@0:     overlapped.OffsetHigh = 0;
aoqi@0:     overlapped.hEvent = NULL;
aoqi@0:     // ReadFile guarantees that if the return value is true, the requested
aoqi@0:     // number of bytes were read before returning.
aoqi@0:     bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0;
aoqi@0:     if (!res) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         DWORD err = GetLastError();
aoqi@0:         tty->print_cr("ReadFile() failed: GetLastError->%ld.", err);
aoqi@0:       }
aoqi@0:       release_memory(base, bytes);
aoqi@0:       CloseHandle(hFile);
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0,
aoqi@0:                                     NULL /*file_name*/);
aoqi@0:     if (hMap == NULL) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         DWORD err = GetLastError();
aoqi@0:         tty->print_cr("CreateFileMapping() failed: GetLastError->%ld.", err);
aoqi@0:       }
aoqi@0:       CloseHandle(hFile);
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0: 
aoqi@0:     DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY;
aoqi@0:     base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset,
aoqi@0:                                   (DWORD)bytes, addr);
aoqi@0:     if (base == NULL) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         DWORD err = GetLastError();
aoqi@0:         tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err);
aoqi@0:       }
aoqi@0:       CloseHandle(hMap);
aoqi@0:       CloseHandle(hFile);
aoqi@0:       return NULL;
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (CloseHandle(hMap) == 0) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         DWORD err = GetLastError();
aoqi@0:         tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err);
aoqi@0:       }
aoqi@0:       CloseHandle(hFile);
aoqi@0:       return base;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (allow_exec) {
aoqi@0:     DWORD old_protect;
aoqi@0:     DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE;
aoqi@0:     bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0;
aoqi@0: 
aoqi@0:     if (!res) {
aoqi@0:       if (PrintMiscellaneous && Verbose) {
aoqi@0:         DWORD err = GetLastError();
aoqi@0:         tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err);
aoqi@0:       }
aoqi@0:       // Don't consider this a hard error, on IA32 even if the
aoqi@0:       // VirtualProtect fails, we should still be able to execute
aoqi@0:       CloseHandle(hFile);
aoqi@0:       return base;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (CloseHandle(hFile) == 0) {
aoqi@0:     if (PrintMiscellaneous && Verbose) {
aoqi@0:       DWORD err = GetLastError();
aoqi@0:       tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err);
aoqi@0:     }
aoqi@0:     return base;
aoqi@0:   }
aoqi@0: 
aoqi@0:   return base;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Remap a block of memory.
aoqi@0: char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset,
aoqi@0:                        char *addr, size_t bytes, bool read_only,
aoqi@0:                        bool allow_exec) {
aoqi@0:   // This OS does not allow existing memory maps to be remapped so we
aoqi@0:   // have to unmap the memory before we remap it.
aoqi@0:   if (!os::unmap_memory(addr, bytes)) {
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // There is a very small theoretical window between the unmap_memory()
aoqi@0:   // call above and the map_memory() call below where a thread in native
aoqi@0:   // code may be able to access an address that is no longer mapped.
aoqi@0: 
aoqi@0:   return os::map_memory(fd, file_name, file_offset, addr, bytes,
aoqi@0:            read_only, allow_exec);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Unmap a block of memory.
aoqi@0: // Returns true=success, otherwise false.
aoqi@0: 
aoqi@0: bool os::pd_unmap_memory(char* addr, size_t bytes) {
aoqi@0:   BOOL result = UnmapViewOfFile(addr);
aoqi@0:   if (result == 0) {
aoqi@0:     if (PrintMiscellaneous && Verbose) {
aoqi@0:       DWORD err = GetLastError();
aoqi@0:       tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err);
aoqi@0:     }
aoqi@0:     return false;
aoqi@0:   }
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::pause() {
aoqi@0:   char filename[MAX_PATH];
aoqi@0:   if (PauseAtStartupFile && PauseAtStartupFile[0]) {
aoqi@0:     jio_snprintf(filename, MAX_PATH, PauseAtStartupFile);
aoqi@0:   } else {
aoqi@0:     jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id());
aoqi@0:   }
aoqi@0: 
aoqi@0:   int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
aoqi@0:   if (fd != -1) {
aoqi@0:     struct stat buf;
aoqi@0:     ::close(fd);
aoqi@0:     while (::stat(filename, &buf) == 0) {
aoqi@0:       Sleep(100);
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     jio_fprintf(stderr,
aoqi@0:       "Could not open pause file '%s', continuing immediately.\n", filename);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
aoqi@0:   assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
aoqi@0: }
aoqi@0: 
aoqi@0: /*
aoqi@0:  * See the caveats for this class in os_windows.hpp
aoqi@0:  * Protects the callback call so that raised OS EXCEPTIONS causes a jump back
aoqi@0:  * into this method and returns false. If no OS EXCEPTION was raised, returns
aoqi@0:  * true.
aoqi@0:  * The callback is supposed to provide the method that should be protected.
aoqi@0:  */
aoqi@0: bool os::WatcherThreadCrashProtection::call(os::CrashProtectionCallback& cb) {
aoqi@0:   assert(Thread::current()->is_Watcher_thread(), "Only for WatcherThread");
aoqi@0:   assert(!WatcherThread::watcher_thread()->has_crash_protection(),
aoqi@0:       "crash_protection already set?");
aoqi@0: 
aoqi@0:   bool success = true;
aoqi@0:   __try {
aoqi@0:     WatcherThread::watcher_thread()->set_crash_protection(this);
aoqi@0:     cb.call();
aoqi@0:   } __except(EXCEPTION_EXECUTE_HANDLER) {
aoqi@0:     // only for protection, nothing to do
aoqi@0:     success = false;
aoqi@0:   }
aoqi@0:   WatcherThread::watcher_thread()->set_crash_protection(NULL);
aoqi@0:   return success;
aoqi@0: }
aoqi@0: 
aoqi@0: // An Event wraps a win32 "CreateEvent" kernel handle.
aoqi@0: //
aoqi@0: // We have a number of choices regarding "CreateEvent" win32 handle leakage:
aoqi@0: //
aoqi@0: // 1:  When a thread dies return the Event to the EventFreeList, clear the ParkHandle
aoqi@0: //     field, and call CloseHandle() on the win32 event handle.  Unpark() would
aoqi@0: //     need to be modified to tolerate finding a NULL (invalid) win32 event handle.
aoqi@0: //     In addition, an unpark() operation might fetch the handle field, but the
aoqi@0: //     event could recycle between the fetch and the SetEvent() operation.
aoqi@0: //     SetEvent() would either fail because the handle was invalid, or inadvertently work,
aoqi@0: //     as the win32 handle value had been recycled.  In an ideal world calling SetEvent()
aoqi@0: //     on an stale but recycled handle would be harmless, but in practice this might
aoqi@0: //     confuse other non-Sun code, so it's not a viable approach.
aoqi@0: //
aoqi@0: // 2:  Once a win32 event handle is associated with an Event, it remains associated
aoqi@0: //     with the Event.  The event handle is never closed.  This could be construed
aoqi@0: //     as handle leakage, but only up to the maximum # of threads that have been extant
aoqi@0: //     at any one time.  This shouldn't be an issue, as windows platforms typically
aoqi@0: //     permit a process to have hundreds of thousands of open handles.
aoqi@0: //
aoqi@0: // 3:  Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList
aoqi@0: //     and release unused handles.
aoqi@0: //
aoqi@0: // 4:  Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle.
aoqi@0: //     It's not clear, however, that we wouldn't be trading one type of leak for another.
aoqi@0: //
aoqi@0: // 5.  Use an RCU-like mechanism (Read-Copy Update).
aoqi@0: //     Or perhaps something similar to Maged Michael's "Hazard pointers".
aoqi@0: //
aoqi@0: // We use (2).
aoqi@0: //
aoqi@0: // TODO-FIXME:
aoqi@0: // 1.  Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation.
aoqi@0: // 2.  Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks
aoqi@0: //     to recover from (or at least detect) the dreaded Windows 841176 bug.
aoqi@0: // 3.  Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent
aoqi@0: //     into a single win32 CreateEvent() handle.
aoqi@0: //
aoqi@0: // _Event transitions in park()
aoqi@0: //   -1 => -1 : illegal
aoqi@0: //    1 =>  0 : pass - return immediately
aoqi@0: //    0 => -1 : block
aoqi@0: //
aoqi@0: // _Event serves as a restricted-range semaphore :
aoqi@0: //    -1 : thread is blocked
aoqi@0: //     0 : neutral  - thread is running or ready
aoqi@0: //     1 : signaled - thread is running or ready
aoqi@0: //
aoqi@0: // Another possible encoding of _Event would be
aoqi@0: // with explicit "PARKED" and "SIGNALED" bits.
aoqi@0: 
aoqi@0: int os::PlatformEvent::park (jlong Millis) {
aoqi@0:     guarantee (_ParkHandle != NULL , "Invariant") ;
aoqi@0:     guarantee (Millis > 0          , "Invariant") ;
aoqi@0:     int v ;
aoqi@0: 
aoqi@0:     // CONSIDER: defer assigning a CreateEvent() handle to the Event until
aoqi@0:     // the initial park() operation.
aoqi@0: 
aoqi@0:     for (;;) {
aoqi@0:         v = _Event ;
aoqi@0:         if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
aoqi@0:     }
aoqi@0:     guarantee ((v == 0) || (v == 1), "invariant") ;
aoqi@0:     if (v != 0) return OS_OK ;
aoqi@0: 
aoqi@0:     // Do this the hard way by blocking ...
aoqi@0:     // TODO: consider a brief spin here, gated on the success of recent
aoqi@0:     // spin attempts by this thread.
aoqi@0:     //
aoqi@0:     // We decompose long timeouts into series of shorter timed waits.
aoqi@0:     // Evidently large timo values passed in WaitForSingleObject() are problematic on some
aoqi@0:     // versions of Windows.  See EventWait() for details.  This may be superstition.  Or not.
aoqi@0:     // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time
aoqi@0:     // with os::javaTimeNanos().  Furthermore, we assume that spurious returns from
aoqi@0:     // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend
aoqi@0:     // to happen early in the wait interval.  Specifically, after a spurious wakeup (rv ==
aoqi@0:     // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate
aoqi@0:     // for the already waited time.  This policy does not admit any new outcomes.
aoqi@0:     // In the future, however, we might want to track the accumulated wait time and
aoqi@0:     // adjust Millis accordingly if we encounter a spurious wakeup.
aoqi@0: 
aoqi@0:     const int MAXTIMEOUT = 0x10000000 ;
aoqi@0:     DWORD rv = WAIT_TIMEOUT ;
aoqi@0:     while (_Event < 0 && Millis > 0) {
aoqi@0:        DWORD prd = Millis ;     // set prd = MAX (Millis, MAXTIMEOUT)
aoqi@0:        if (Millis > MAXTIMEOUT) {
aoqi@0:           prd = MAXTIMEOUT ;
aoqi@0:        }
aoqi@0:        rv = ::WaitForSingleObject (_ParkHandle, prd) ;
aoqi@0:        assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ;
aoqi@0:        if (rv == WAIT_TIMEOUT) {
aoqi@0:            Millis -= prd ;
aoqi@0:        }
aoqi@0:     }
aoqi@0:     v = _Event ;
aoqi@0:     _Event = 0 ;
aoqi@0:     // see comment at end of os::PlatformEvent::park() below:
aoqi@0:     OrderAccess::fence() ;
aoqi@0:     // If we encounter a nearly simultanous timeout expiry and unpark()
aoqi@0:     // we return OS_OK indicating we awoke via unpark().
aoqi@0:     // Implementor's license -- returning OS_TIMEOUT would be equally valid, however.
aoqi@0:     return (v >= 0) ? OS_OK : OS_TIMEOUT ;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::PlatformEvent::park () {
aoqi@0:     guarantee (_ParkHandle != NULL, "Invariant") ;
aoqi@0:     // Invariant: Only the thread associated with the Event/PlatformEvent
aoqi@0:     // may call park().
aoqi@0:     int v ;
aoqi@0:     for (;;) {
aoqi@0:         v = _Event ;
aoqi@0:         if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ;
aoqi@0:     }
aoqi@0:     guarantee ((v == 0) || (v == 1), "invariant") ;
aoqi@0:     if (v != 0) return ;
aoqi@0: 
aoqi@0:     // Do this the hard way by blocking ...
aoqi@0:     // TODO: consider a brief spin here, gated on the success of recent
aoqi@0:     // spin attempts by this thread.
aoqi@0:     while (_Event < 0) {
aoqi@0:        DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ;
aoqi@0:        assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ;
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Usually we'll find _Event == 0 at this point, but as
aoqi@0:     // an optional optimization we clear it, just in case can
aoqi@0:     // multiple unpark() operations drove _Event up to 1.
aoqi@0:     _Event = 0 ;
aoqi@0:     OrderAccess::fence() ;
aoqi@0:     guarantee (_Event >= 0, "invariant") ;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::PlatformEvent::unpark() {
aoqi@0:   guarantee (_ParkHandle != NULL, "Invariant") ;
aoqi@0: 
aoqi@0:   // Transitions for _Event:
aoqi@0:   //    0 :=> 1
aoqi@0:   //    1 :=> 1
aoqi@0:   //   -1 :=> either 0 or 1; must signal target thread
aoqi@0:   //          That is, we can safely transition _Event from -1 to either
aoqi@0:   //          0 or 1. Forcing 1 is slightly more efficient for back-to-back
aoqi@0:   //          unpark() calls.
aoqi@0:   // See also: "Semaphores in Plan 9" by Mullender & Cox
aoqi@0:   //
aoqi@0:   // Note: Forcing a transition from "-1" to "1" on an unpark() means
aoqi@0:   // that it will take two back-to-back park() calls for the owning
aoqi@0:   // thread to block. This has the benefit of forcing a spurious return
aoqi@0:   // from the first park() call after an unpark() call which will help
aoqi@0:   // shake out uses of park() and unpark() without condition variables.
aoqi@0: 
aoqi@0:   if (Atomic::xchg(1, &_Event) >= 0) return;
aoqi@0: 
aoqi@0:   ::SetEvent(_ParkHandle);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // JSR166
aoqi@0: // -------------------------------------------------------
aoqi@0: 
aoqi@0: /*
aoqi@0:  * The Windows implementation of Park is very straightforward: Basic
aoqi@0:  * operations on Win32 Events turn out to have the right semantics to
aoqi@0:  * use them directly. We opportunistically resuse the event inherited
aoqi@0:  * from Monitor.
aoqi@0:  */
aoqi@0: 
aoqi@0: 
aoqi@0: void Parker::park(bool isAbsolute, jlong time) {
aoqi@0:   guarantee (_ParkEvent != NULL, "invariant") ;
aoqi@0:   // First, demultiplex/decode time arguments
aoqi@0:   if (time < 0) { // don't wait
aoqi@0:     return;
aoqi@0:   }
aoqi@0:   else if (time == 0 && !isAbsolute) {
aoqi@0:     time = INFINITE;
aoqi@0:   }
aoqi@0:   else if  (isAbsolute) {
aoqi@0:     time -= os::javaTimeMillis(); // convert to relative time
aoqi@0:     if (time <= 0) // already elapsed
aoqi@0:       return;
aoqi@0:   }
aoqi@0:   else { // relative
aoqi@0:     time /= 1000000; // Must coarsen from nanos to millis
aoqi@0:     if (time == 0)   // Wait for the minimal time unit if zero
aoqi@0:       time = 1;
aoqi@0:   }
aoqi@0: 
aoqi@0:   JavaThread* thread = (JavaThread*)(Thread::current());
aoqi@0:   assert(thread->is_Java_thread(), "Must be JavaThread");
aoqi@0:   JavaThread *jt = (JavaThread *)thread;
aoqi@0: 
aoqi@0:   // Don't wait if interrupted or already triggered
aoqi@0:   if (Thread::is_interrupted(thread, false) ||
aoqi@0:     WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) {
aoqi@0:     ResetEvent(_ParkEvent);
aoqi@0:     return;
aoqi@0:   }
aoqi@0:   else {
aoqi@0:     ThreadBlockInVM tbivm(jt);
aoqi@0:     OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
aoqi@0:     jt->set_suspend_equivalent();
aoqi@0: 
aoqi@0:     WaitForSingleObject(_ParkEvent,  time);
aoqi@0:     ResetEvent(_ParkEvent);
aoqi@0: 
aoqi@0:     // If externally suspended while waiting, re-suspend
aoqi@0:     if (jt->handle_special_suspend_equivalent_condition()) {
aoqi@0:       jt->java_suspend_self();
aoqi@0:     }
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: void Parker::unpark() {
aoqi@0:   guarantee (_ParkEvent != NULL, "invariant") ;
aoqi@0:   SetEvent(_ParkEvent);
aoqi@0: }
aoqi@0: 
aoqi@0: // Run the specified command in a separate process. Return its exit value,
aoqi@0: // or -1 on failure (e.g. can't create a new process).
aoqi@0: int os::fork_and_exec(char* cmd) {
aoqi@0:   STARTUPINFO si;
aoqi@0:   PROCESS_INFORMATION pi;
aoqi@0: 
aoqi@0:   memset(&si, 0, sizeof(si));
aoqi@0:   si.cb = sizeof(si);
aoqi@0:   memset(&pi, 0, sizeof(pi));
aoqi@0:   BOOL rslt = CreateProcess(NULL,   // executable name - use command line
aoqi@0:                             cmd,    // command line
aoqi@0:                             NULL,   // process security attribute
aoqi@0:                             NULL,   // thread security attribute
aoqi@0:                             TRUE,   // inherits system handles
aoqi@0:                             0,      // no creation flags
aoqi@0:                             NULL,   // use parent's environment block
aoqi@0:                             NULL,   // use parent's starting directory
aoqi@0:                             &si,    // (in) startup information
aoqi@0:                             &pi);   // (out) process information
aoqi@0: 
aoqi@0:   if (rslt) {
aoqi@0:     // Wait until child process exits.
aoqi@0:     WaitForSingleObject(pi.hProcess, INFINITE);
aoqi@0: 
aoqi@0:     DWORD exit_code;
aoqi@0:     GetExitCodeProcess(pi.hProcess, &exit_code);
aoqi@0: 
aoqi@0:     // Close process and thread handles.
aoqi@0:     CloseHandle(pi.hProcess);
aoqi@0:     CloseHandle(pi.hThread);
aoqi@0: 
aoqi@0:     return (int)exit_code;
aoqi@0:   } else {
aoqi@0:     return -1;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: //--------------------------------------------------------------------------------------------------
aoqi@0: // Non-product code
aoqi@0: 
aoqi@0: static int mallocDebugIntervalCounter = 0;
aoqi@0: static int mallocDebugCounter = 0;
aoqi@0: bool os::check_heap(bool force) {
aoqi@0:   if (++mallocDebugCounter < MallocVerifyStart && !force) return true;
aoqi@0:   if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) {
aoqi@0:     // Note: HeapValidate executes two hardware breakpoints when it finds something
aoqi@0:     // wrong; at these points, eax contains the address of the offending block (I think).
aoqi@0:     // To get to the exlicit error message(s) below, just continue twice.
aoqi@0:     HANDLE heap = GetProcessHeap();
aoqi@0:     { HeapLock(heap);
aoqi@0:       PROCESS_HEAP_ENTRY phe;
aoqi@0:       phe.lpData = NULL;
aoqi@0:       while (HeapWalk(heap, &phe) != 0) {
aoqi@0:         if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) &&
aoqi@0:             !HeapValidate(heap, 0, phe.lpData)) {
aoqi@0:           tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter);
aoqi@0:           tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData);
aoqi@0:           fatal("corrupted C heap");
aoqi@0:         }
aoqi@0:       }
aoqi@0:       DWORD err = GetLastError();
aoqi@0:       if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) {
aoqi@0:         fatal(err_msg("heap walk aborted with error %d", err));
aoqi@0:       }
aoqi@0:       HeapUnlock(heap);
aoqi@0:     }
aoqi@0:     mallocDebugIntervalCounter = 0;
aoqi@0:   }
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: bool os::find(address addr, outputStream* st) {
aoqi@0:   // Nothing yet
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) {
aoqi@0:   DWORD exception_code = e->ExceptionRecord->ExceptionCode;
aoqi@0: 
aoqi@0:   if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) {
aoqi@0:     JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow();
aoqi@0:     PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord;
aoqi@0:     address addr = (address) exceptionRecord->ExceptionInformation[1];
aoqi@0: 
aoqi@0:     if (os::is_memory_serialize_page(thread, addr))
aoqi@0:       return EXCEPTION_CONTINUE_EXECUTION;
aoqi@0:   }
aoqi@0: 
aoqi@0:   return EXCEPTION_CONTINUE_SEARCH;
aoqi@0: }
aoqi@0: 
aoqi@0: // We don't build a headless jre for Windows
aoqi@0: bool os::is_headless_jre() { return false; }
aoqi@0: 
aoqi@0: static jint initSock() {
aoqi@0:   WSADATA wsadata;
aoqi@0: 
aoqi@0:   if (!os::WinSock2Dll::WinSock2Available()) {
aoqi@0:     jio_fprintf(stderr, "Could not load Winsock (error: %d)\n",
aoqi@0:       ::GetLastError());
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (os::WinSock2Dll::WSAStartup(MAKEWORD(2,2), &wsadata) != 0) {
aoqi@0:     jio_fprintf(stderr, "Could not initialize Winsock (error: %d)\n",
aoqi@0:       ::GetLastError());
aoqi@0:     return JNI_ERR;
aoqi@0:   }
aoqi@0:   return JNI_OK;
aoqi@0: }
aoqi@0: 
aoqi@0: struct hostent* os::get_host_by_name(char* name) {
aoqi@0:   return (struct hostent*)os::WinSock2Dll::gethostbyname(name);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::socket_close(int fd) {
aoqi@0:   return ::closesocket(fd);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::socket_available(int fd, jint *pbytes) {
aoqi@0:   int ret = ::ioctlsocket(fd, FIONREAD, (u_long*)pbytes);
aoqi@0:   return (ret < 0) ? 0 : 1;
aoqi@0: }
aoqi@0: 
aoqi@0: int os::socket(int domain, int type, int protocol) {
aoqi@0:   return ::socket(domain, type, protocol);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::listen(int fd, int count) {
aoqi@0:   return ::listen(fd, count);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::connect(int fd, struct sockaddr* him, socklen_t len) {
aoqi@0:   return ::connect(fd, him, len);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
aoqi@0:   return ::accept(fd, him, len);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::sendto(int fd, char* buf, size_t len, uint flags,
aoqi@0:                struct sockaddr* to, socklen_t tolen) {
aoqi@0: 
aoqi@0:   return ::sendto(fd, buf, (int)len, flags, to, tolen);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::recvfrom(int fd, char *buf, size_t nBytes, uint flags,
aoqi@0:                  sockaddr* from, socklen_t* fromlen) {
aoqi@0: 
aoqi@0:   return ::recvfrom(fd, buf, (int)nBytes, flags, from, fromlen);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
aoqi@0:   return ::recv(fd, buf, (int)nBytes, flags);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::send(int fd, char* buf, size_t nBytes, uint flags) {
aoqi@0:   return ::send(fd, buf, (int)nBytes, flags);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
aoqi@0:   return ::send(fd, buf, (int)nBytes, flags);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::timeout(int fd, long timeout) {
aoqi@0:   fd_set tbl;
aoqi@0:   struct timeval t;
aoqi@0: 
aoqi@0:   t.tv_sec  = timeout / 1000;
aoqi@0:   t.tv_usec = (timeout % 1000) * 1000;
aoqi@0: 
aoqi@0:   tbl.fd_count    = 1;
aoqi@0:   tbl.fd_array[0] = fd;
aoqi@0: 
aoqi@0:   return ::select(1, &tbl, 0, 0, &t);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::get_host_name(char* name, int namelen) {
aoqi@0:   return ::gethostname(name, namelen);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::socket_shutdown(int fd, int howto) {
aoqi@0:   return ::shutdown(fd, howto);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::bind(int fd, struct sockaddr* him, socklen_t len) {
aoqi@0:   return ::bind(fd, him, len);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
aoqi@0:   return ::getsockname(fd, him, len);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::get_sock_opt(int fd, int level, int optname,
aoqi@0:                      char* optval, socklen_t* optlen) {
aoqi@0:   return ::getsockopt(fd, level, optname, optval, optlen);
aoqi@0: }
aoqi@0: 
aoqi@0: int os::set_sock_opt(int fd, int level, int optname,
aoqi@0:                      const char* optval, socklen_t optlen) {
aoqi@0:   return ::setsockopt(fd, level, optname, optval, optlen);
aoqi@0: }
aoqi@0: 
aoqi@0: // WINDOWS CONTEXT Flags for THREAD_SAMPLING
aoqi@0: #if defined(IA32)
aoqi@0: #  define sampling_context_flags (CONTEXT_FULL | CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS)
aoqi@0: #elif defined (AMD64)
aoqi@0: #  define sampling_context_flags (CONTEXT_FULL | CONTEXT_FLOATING_POINT)
aoqi@0: #endif
aoqi@0: 
aoqi@0: // returns true if thread could be suspended,
aoqi@0: // false otherwise
aoqi@0: static bool do_suspend(HANDLE* h) {
aoqi@0:   if (h != NULL) {
aoqi@0:     if (SuspendThread(*h) != ~0) {
aoqi@0:       return true;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return false;
aoqi@0: }
aoqi@0: 
aoqi@0: // resume the thread
aoqi@0: // calling resume on an active thread is a no-op
aoqi@0: static void do_resume(HANDLE* h) {
aoqi@0:   if (h != NULL) {
aoqi@0:     ResumeThread(*h);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: // retrieve a suspend/resume context capable handle
aoqi@0: // from the tid. Caller validates handle return value.
aoqi@0: void get_thread_handle_for_extended_context(HANDLE* h, OSThread::thread_id_t tid) {
aoqi@0:   if (h != NULL) {
aoqi@0:     *h = OpenThread(THREAD_SUSPEND_RESUME | THREAD_GET_CONTEXT | THREAD_QUERY_INFORMATION, FALSE, tid);
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: //
aoqi@0: // Thread sampling implementation
aoqi@0: //
aoqi@0: void os::SuspendedThreadTask::internal_do_task() {
aoqi@0:   CONTEXT    ctxt;
aoqi@0:   HANDLE     h = NULL;
aoqi@0: 
aoqi@0:   // get context capable handle for thread
aoqi@0:   get_thread_handle_for_extended_context(&h, _thread->osthread()->thread_id());
aoqi@0: 
aoqi@0:   // sanity
aoqi@0:   if (h == NULL || h == INVALID_HANDLE_VALUE) {
aoqi@0:     return;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // suspend the thread
aoqi@0:   if (do_suspend(&h)) {
aoqi@0:     ctxt.ContextFlags = sampling_context_flags;
aoqi@0:     // get thread context
aoqi@0:     GetThreadContext(h, &ctxt);
aoqi@0:     SuspendedThreadTaskContext context(_thread, &ctxt);
aoqi@0:     // pass context to Thread Sampling impl
aoqi@0:     do_task(context);
aoqi@0:     // resume thread
aoqi@0:     do_resume(&h);
aoqi@0:   }
aoqi@0: 
aoqi@0:   // close handle
aoqi@0:   CloseHandle(h);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Kernel32 API
aoqi@0: typedef SIZE_T (WINAPI* GetLargePageMinimum_Fn)(void);
aoqi@0: typedef LPVOID (WINAPI *VirtualAllocExNuma_Fn) (HANDLE, LPVOID, SIZE_T, DWORD, DWORD, DWORD);
aoqi@0: typedef BOOL (WINAPI *GetNumaHighestNodeNumber_Fn) (PULONG);
aoqi@0: typedef BOOL (WINAPI *GetNumaNodeProcessorMask_Fn) (UCHAR, PULONGLONG);
aoqi@0: typedef USHORT (WINAPI* RtlCaptureStackBackTrace_Fn)(ULONG, ULONG, PVOID*, PULONG);
aoqi@0: 
aoqi@0: GetLargePageMinimum_Fn      os::Kernel32Dll::_GetLargePageMinimum = NULL;
aoqi@0: VirtualAllocExNuma_Fn       os::Kernel32Dll::_VirtualAllocExNuma = NULL;
aoqi@0: GetNumaHighestNodeNumber_Fn os::Kernel32Dll::_GetNumaHighestNodeNumber = NULL;
aoqi@0: GetNumaNodeProcessorMask_Fn os::Kernel32Dll::_GetNumaNodeProcessorMask = NULL;
aoqi@0: RtlCaptureStackBackTrace_Fn os::Kernel32Dll::_RtlCaptureStackBackTrace = NULL;
aoqi@0: 
aoqi@0: 
aoqi@0: BOOL                        os::Kernel32Dll::initialized = FALSE;
aoqi@0: SIZE_T os::Kernel32Dll::GetLargePageMinimum() {
aoqi@0:   assert(initialized && _GetLargePageMinimum != NULL,
aoqi@0:     "GetLargePageMinimumAvailable() not yet called");
aoqi@0:   return _GetLargePageMinimum();
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::GetLargePageMinimumAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _GetLargePageMinimum != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::NumaCallsAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _VirtualAllocExNuma != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: LPVOID os::Kernel32Dll::VirtualAllocExNuma(HANDLE hProc, LPVOID addr, SIZE_T bytes, DWORD flags, DWORD prot, DWORD node) {
aoqi@0:   assert(initialized && _VirtualAllocExNuma != NULL,
aoqi@0:     "NUMACallsAvailable() not yet called");
aoqi@0: 
aoqi@0:   return _VirtualAllocExNuma(hProc, addr, bytes, flags, prot, node);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::GetNumaHighestNodeNumber(PULONG ptr_highest_node_number) {
aoqi@0:   assert(initialized && _GetNumaHighestNodeNumber != NULL,
aoqi@0:     "NUMACallsAvailable() not yet called");
aoqi@0: 
aoqi@0:   return _GetNumaHighestNodeNumber(ptr_highest_node_number);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::GetNumaNodeProcessorMask(UCHAR node, PULONGLONG proc_mask) {
aoqi@0:   assert(initialized && _GetNumaNodeProcessorMask != NULL,
aoqi@0:     "NUMACallsAvailable() not yet called");
aoqi@0: 
aoqi@0:   return _GetNumaNodeProcessorMask(node, proc_mask);
aoqi@0: }
aoqi@0: 
aoqi@0: USHORT os::Kernel32Dll::RtlCaptureStackBackTrace(ULONG FrameToSkip,
aoqi@0:   ULONG FrameToCapture, PVOID* BackTrace, PULONG BackTraceHash) {
aoqi@0:     if (!initialized) {
aoqi@0:       initialize();
aoqi@0:     }
aoqi@0: 
aoqi@0:     if (_RtlCaptureStackBackTrace != NULL) {
aoqi@0:       return _RtlCaptureStackBackTrace(FrameToSkip, FrameToCapture,
aoqi@0:         BackTrace, BackTraceHash);
aoqi@0:     } else {
aoqi@0:       return 0;
aoqi@0:     }
aoqi@0: }
aoqi@0: 
aoqi@0: void os::Kernel32Dll::initializeCommon() {
aoqi@0:   if (!initialized) {
aoqi@0:     HMODULE handle = ::GetModuleHandle("Kernel32.dll");
aoqi@0:     assert(handle != NULL, "Just check");
aoqi@0:     _GetLargePageMinimum = (GetLargePageMinimum_Fn)::GetProcAddress(handle, "GetLargePageMinimum");
aoqi@0:     _VirtualAllocExNuma = (VirtualAllocExNuma_Fn)::GetProcAddress(handle, "VirtualAllocExNuma");
aoqi@0:     _GetNumaHighestNodeNumber = (GetNumaHighestNodeNumber_Fn)::GetProcAddress(handle, "GetNumaHighestNodeNumber");
aoqi@0:     _GetNumaNodeProcessorMask = (GetNumaNodeProcessorMask_Fn)::GetProcAddress(handle, "GetNumaNodeProcessorMask");
aoqi@0:     _RtlCaptureStackBackTrace = (RtlCaptureStackBackTrace_Fn)::GetProcAddress(handle, "RtlCaptureStackBackTrace");
aoqi@0:     initialized = TRUE;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: #ifndef JDK6_OR_EARLIER
aoqi@0: 
aoqi@0: void os::Kernel32Dll::initialize() {
aoqi@0:   initializeCommon();
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // Kernel32 API
aoqi@0: inline BOOL os::Kernel32Dll::SwitchToThread() {
aoqi@0:   return ::SwitchToThread();
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0:   // Help tools
aoqi@0: inline BOOL os::Kernel32Dll::HelpToolsAvailable() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: inline HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
aoqi@0:   return ::CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
aoqi@0:   return ::Module32First(hSnapshot, lpme);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
aoqi@0:   return ::Module32Next(hSnapshot, lpme);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: inline BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: inline void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
aoqi@0:   ::GetNativeSystemInfo(lpSystemInfo);
aoqi@0: }
aoqi@0: 
aoqi@0: // PSAPI API
aoqi@0: inline BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
aoqi@0:   return ::EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
aoqi@0: }
aoqi@0: 
aoqi@0: inline DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
aoqi@0:   return ::GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
aoqi@0:   return ::GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::PSApiDll::PSApiAvailable() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // WinSock2 API
aoqi@0: inline BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
aoqi@0:   return ::WSAStartup(wVersionRequested, lpWSAData);
aoqi@0: }
aoqi@0: 
aoqi@0: inline struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
aoqi@0:   return ::gethostbyname(name);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::WinSock2Dll::WinSock2Available() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: // Advapi API
aoqi@0: inline BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
aoqi@0:    BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
aoqi@0:    PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
aoqi@0:      return ::AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
aoqi@0:        BufferLength, PreviousState, ReturnLength);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
aoqi@0:   PHANDLE TokenHandle) {
aoqi@0:     return ::OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
aoqi@0:   return ::LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Advapi32Dll::AdvapiAvailable() {
aoqi@0:   return true;
aoqi@0: }
aoqi@0: 
aoqi@0: void* os::get_default_process_handle() {
aoqi@0:   return (void*)GetModuleHandle(NULL);
aoqi@0: }
aoqi@0: 
aoqi@0: // Builds a platform dependent Agent_OnLoad_<lib_name> function name
aoqi@0: // which is used to find statically linked in agents.
aoqi@0: // Additionally for windows, takes into account __stdcall names.
aoqi@0: // Parameters:
aoqi@0: //            sym_name: Symbol in library we are looking for
aoqi@0: //            lib_name: Name of library to look in, NULL for shared libs.
aoqi@0: //            is_absolute_path == true if lib_name is absolute path to agent
aoqi@0: //                                     such as "C:/a/b/L.dll"
aoqi@0: //            == false if only the base name of the library is passed in
aoqi@0: //               such as "L"
aoqi@0: char* os::build_agent_function_name(const char *sym_name, const char *lib_name,
aoqi@0:                                     bool is_absolute_path) {
aoqi@0:   char *agent_entry_name;
aoqi@0:   size_t len;
aoqi@0:   size_t name_len;
aoqi@0:   size_t prefix_len = strlen(JNI_LIB_PREFIX);
aoqi@0:   size_t suffix_len = strlen(JNI_LIB_SUFFIX);
aoqi@0:   const char *start;
aoqi@0: 
aoqi@0:   if (lib_name != NULL) {
aoqi@0:     len = name_len = strlen(lib_name);
aoqi@0:     if (is_absolute_path) {
aoqi@0:       // Need to strip path, prefix and suffix
aoqi@0:       if ((start = strrchr(lib_name, *os::file_separator())) != NULL) {
aoqi@0:         lib_name = ++start;
aoqi@0:       } else {
aoqi@0:         // Need to check for drive prefix
aoqi@0:         if ((start = strchr(lib_name, ':')) != NULL) {
aoqi@0:           lib_name = ++start;
aoqi@0:         }
aoqi@0:       }
aoqi@0:       if (len <= (prefix_len + suffix_len)) {
aoqi@0:         return NULL;
aoqi@0:       }
aoqi@0:       lib_name += prefix_len;
aoqi@0:       name_len = strlen(lib_name) - suffix_len;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   len = (lib_name != NULL ? name_len : 0) + strlen(sym_name) + 2;
aoqi@0:   agent_entry_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, len, mtThread);
aoqi@0:   if (agent_entry_name == NULL) {
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0:   if (lib_name != NULL) {
aoqi@0:     const char *p = strrchr(sym_name, '@');
aoqi@0:     if (p != NULL && p != sym_name) {
aoqi@0:       // sym_name == _Agent_OnLoad@XX
aoqi@0:       strncpy(agent_entry_name, sym_name, (p - sym_name));
aoqi@0:       agent_entry_name[(p-sym_name)] = '\0';
aoqi@0:       // agent_entry_name == _Agent_OnLoad
aoqi@0:       strcat(agent_entry_name, "_");
aoqi@0:       strncat(agent_entry_name, lib_name, name_len);
aoqi@0:       strcat(agent_entry_name, p);
aoqi@0:       // agent_entry_name == _Agent_OnLoad_lib_name@XX
aoqi@0:     } else {
aoqi@0:       strcpy(agent_entry_name, sym_name);
aoqi@0:       strcat(agent_entry_name, "_");
aoqi@0:       strncat(agent_entry_name, lib_name, name_len);
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     strcpy(agent_entry_name, sym_name);
aoqi@0:   }
aoqi@0:   return agent_entry_name;
aoqi@0: }
aoqi@0: 
aoqi@0: #else
aoqi@0: // Kernel32 API
aoqi@0: typedef BOOL (WINAPI* SwitchToThread_Fn)(void);
aoqi@0: typedef HANDLE (WINAPI* CreateToolhelp32Snapshot_Fn)(DWORD,DWORD);
aoqi@0: typedef BOOL (WINAPI* Module32First_Fn)(HANDLE,LPMODULEENTRY32);
aoqi@0: typedef BOOL (WINAPI* Module32Next_Fn)(HANDLE,LPMODULEENTRY32);
aoqi@0: typedef void (WINAPI* GetNativeSystemInfo_Fn)(LPSYSTEM_INFO);
aoqi@0: 
aoqi@0: SwitchToThread_Fn           os::Kernel32Dll::_SwitchToThread = NULL;
aoqi@0: CreateToolhelp32Snapshot_Fn os::Kernel32Dll::_CreateToolhelp32Snapshot = NULL;
aoqi@0: Module32First_Fn            os::Kernel32Dll::_Module32First = NULL;
aoqi@0: Module32Next_Fn             os::Kernel32Dll::_Module32Next = NULL;
aoqi@0: GetNativeSystemInfo_Fn      os::Kernel32Dll::_GetNativeSystemInfo = NULL;
aoqi@0: 
aoqi@0: void os::Kernel32Dll::initialize() {
aoqi@0:   if (!initialized) {
aoqi@0:     HMODULE handle = ::GetModuleHandle("Kernel32.dll");
aoqi@0:     assert(handle != NULL, "Just check");
aoqi@0: 
aoqi@0:     _SwitchToThread = (SwitchToThread_Fn)::GetProcAddress(handle, "SwitchToThread");
aoqi@0:     _CreateToolhelp32Snapshot = (CreateToolhelp32Snapshot_Fn)
aoqi@0:       ::GetProcAddress(handle, "CreateToolhelp32Snapshot");
aoqi@0:     _Module32First = (Module32First_Fn)::GetProcAddress(handle, "Module32First");
aoqi@0:     _Module32Next = (Module32Next_Fn)::GetProcAddress(handle, "Module32Next");
aoqi@0:     _GetNativeSystemInfo = (GetNativeSystemInfo_Fn)::GetProcAddress(handle, "GetNativeSystemInfo");
aoqi@0:     initializeCommon();  // resolve the functions that always need resolving
aoqi@0: 
aoqi@0:     initialized = TRUE;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::SwitchToThread() {
aoqi@0:   assert(initialized && _SwitchToThread != NULL,
aoqi@0:     "SwitchToThreadAvailable() not yet called");
aoqi@0:   return _SwitchToThread();
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::SwitchToThreadAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _SwitchToThread != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: // Help tools
aoqi@0: BOOL os::Kernel32Dll::HelpToolsAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _CreateToolhelp32Snapshot != NULL &&
aoqi@0:          _Module32First != NULL &&
aoqi@0:          _Module32Next != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: HANDLE os::Kernel32Dll::CreateToolhelp32Snapshot(DWORD dwFlags,DWORD th32ProcessId) {
aoqi@0:   assert(initialized && _CreateToolhelp32Snapshot != NULL,
aoqi@0:     "HelpToolsAvailable() not yet called");
aoqi@0: 
aoqi@0:   return _CreateToolhelp32Snapshot(dwFlags, th32ProcessId);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::Module32First(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
aoqi@0:   assert(initialized && _Module32First != NULL,
aoqi@0:     "HelpToolsAvailable() not yet called");
aoqi@0: 
aoqi@0:   return _Module32First(hSnapshot, lpme);
aoqi@0: }
aoqi@0: 
aoqi@0: inline BOOL os::Kernel32Dll::Module32Next(HANDLE hSnapshot,LPMODULEENTRY32 lpme) {
aoqi@0:   assert(initialized && _Module32Next != NULL,
aoqi@0:     "HelpToolsAvailable() not yet called");
aoqi@0: 
aoqi@0:   return _Module32Next(hSnapshot, lpme);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: BOOL os::Kernel32Dll::GetNativeSystemInfoAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _GetNativeSystemInfo != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: void os::Kernel32Dll::GetNativeSystemInfo(LPSYSTEM_INFO lpSystemInfo) {
aoqi@0:   assert(initialized && _GetNativeSystemInfo != NULL,
aoqi@0:     "GetNativeSystemInfoAvailable() not yet called");
aoqi@0: 
aoqi@0:   _GetNativeSystemInfo(lpSystemInfo);
aoqi@0: }
aoqi@0: 
aoqi@0: // PSAPI API
aoqi@0: 
aoqi@0: 
aoqi@0: typedef BOOL (WINAPI *EnumProcessModules_Fn)(HANDLE, HMODULE *, DWORD, LPDWORD);
aoqi@0: typedef BOOL (WINAPI *GetModuleFileNameEx_Fn)(HANDLE, HMODULE, LPTSTR, DWORD);;
aoqi@0: typedef BOOL (WINAPI *GetModuleInformation_Fn)(HANDLE, HMODULE, LPMODULEINFO, DWORD);
aoqi@0: 
aoqi@0: EnumProcessModules_Fn   os::PSApiDll::_EnumProcessModules = NULL;
aoqi@0: GetModuleFileNameEx_Fn  os::PSApiDll::_GetModuleFileNameEx = NULL;
aoqi@0: GetModuleInformation_Fn os::PSApiDll::_GetModuleInformation = NULL;
aoqi@0: BOOL                    os::PSApiDll::initialized = FALSE;
aoqi@0: 
aoqi@0: void os::PSApiDll::initialize() {
aoqi@0:   if (!initialized) {
aoqi@0:     HMODULE handle = os::win32::load_Windows_dll("PSAPI.DLL", NULL, 0);
aoqi@0:     if (handle != NULL) {
aoqi@0:       _EnumProcessModules = (EnumProcessModules_Fn)::GetProcAddress(handle,
aoqi@0:         "EnumProcessModules");
aoqi@0:       _GetModuleFileNameEx = (GetModuleFileNameEx_Fn)::GetProcAddress(handle,
aoqi@0:         "GetModuleFileNameExA");
aoqi@0:       _GetModuleInformation = (GetModuleInformation_Fn)::GetProcAddress(handle,
aoqi@0:         "GetModuleInformation");
aoqi@0:     }
aoqi@0:     initialized = TRUE;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: BOOL os::PSApiDll::EnumProcessModules(HANDLE hProcess, HMODULE *lpModule, DWORD cb, LPDWORD lpcbNeeded) {
aoqi@0:   assert(initialized && _EnumProcessModules != NULL,
aoqi@0:     "PSApiAvailable() not yet called");
aoqi@0:   return _EnumProcessModules(hProcess, lpModule, cb, lpcbNeeded);
aoqi@0: }
aoqi@0: 
aoqi@0: DWORD os::PSApiDll::GetModuleFileNameEx(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename, DWORD nSize) {
aoqi@0:   assert(initialized && _GetModuleFileNameEx != NULL,
aoqi@0:     "PSApiAvailable() not yet called");
aoqi@0:   return _GetModuleFileNameEx(hProcess, hModule, lpFilename, nSize);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::PSApiDll::GetModuleInformation(HANDLE hProcess, HMODULE hModule, LPMODULEINFO lpmodinfo, DWORD cb) {
aoqi@0:   assert(initialized && _GetModuleInformation != NULL,
aoqi@0:     "PSApiAvailable() not yet called");
aoqi@0:   return _GetModuleInformation(hProcess, hModule, lpmodinfo, cb);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::PSApiDll::PSApiAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _EnumProcessModules != NULL &&
aoqi@0:     _GetModuleFileNameEx != NULL &&
aoqi@0:     _GetModuleInformation != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: // WinSock2 API
aoqi@0: typedef int (PASCAL FAR* WSAStartup_Fn)(WORD, LPWSADATA);
aoqi@0: typedef struct hostent *(PASCAL FAR *gethostbyname_Fn)(...);
aoqi@0: 
aoqi@0: WSAStartup_Fn    os::WinSock2Dll::_WSAStartup = NULL;
aoqi@0: gethostbyname_Fn os::WinSock2Dll::_gethostbyname = NULL;
aoqi@0: BOOL             os::WinSock2Dll::initialized = FALSE;
aoqi@0: 
aoqi@0: void os::WinSock2Dll::initialize() {
aoqi@0:   if (!initialized) {
aoqi@0:     HMODULE handle = os::win32::load_Windows_dll("ws2_32.dll", NULL, 0);
aoqi@0:     if (handle != NULL) {
aoqi@0:       _WSAStartup = (WSAStartup_Fn)::GetProcAddress(handle, "WSAStartup");
aoqi@0:       _gethostbyname = (gethostbyname_Fn)::GetProcAddress(handle, "gethostbyname");
aoqi@0:     }
aoqi@0:     initialized = TRUE;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: BOOL os::WinSock2Dll::WSAStartup(WORD wVersionRequested, LPWSADATA lpWSAData) {
aoqi@0:   assert(initialized && _WSAStartup != NULL,
aoqi@0:     "WinSock2Available() not yet called");
aoqi@0:   return _WSAStartup(wVersionRequested, lpWSAData);
aoqi@0: }
aoqi@0: 
aoqi@0: struct hostent* os::WinSock2Dll::gethostbyname(const char *name) {
aoqi@0:   assert(initialized && _gethostbyname != NULL,
aoqi@0:     "WinSock2Available() not yet called");
aoqi@0:   return _gethostbyname(name);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::WinSock2Dll::WinSock2Available() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _WSAStartup != NULL &&
aoqi@0:     _gethostbyname != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: typedef BOOL (WINAPI *AdjustTokenPrivileges_Fn)(HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD);
aoqi@0: typedef BOOL (WINAPI *OpenProcessToken_Fn)(HANDLE, DWORD, PHANDLE);
aoqi@0: typedef BOOL (WINAPI *LookupPrivilegeValue_Fn)(LPCTSTR, LPCTSTR, PLUID);
aoqi@0: 
aoqi@0: AdjustTokenPrivileges_Fn os::Advapi32Dll::_AdjustTokenPrivileges = NULL;
aoqi@0: OpenProcessToken_Fn      os::Advapi32Dll::_OpenProcessToken = NULL;
aoqi@0: LookupPrivilegeValue_Fn  os::Advapi32Dll::_LookupPrivilegeValue = NULL;
aoqi@0: BOOL                     os::Advapi32Dll::initialized = FALSE;
aoqi@0: 
aoqi@0: void os::Advapi32Dll::initialize() {
aoqi@0:   if (!initialized) {
aoqi@0:     HMODULE handle = os::win32::load_Windows_dll("advapi32.dll", NULL, 0);
aoqi@0:     if (handle != NULL) {
aoqi@0:       _AdjustTokenPrivileges = (AdjustTokenPrivileges_Fn)::GetProcAddress(handle,
aoqi@0:         "AdjustTokenPrivileges");
aoqi@0:       _OpenProcessToken = (OpenProcessToken_Fn)::GetProcAddress(handle,
aoqi@0:         "OpenProcessToken");
aoqi@0:       _LookupPrivilegeValue = (LookupPrivilegeValue_Fn)::GetProcAddress(handle,
aoqi@0:         "LookupPrivilegeValueA");
aoqi@0:     }
aoqi@0:     initialized = TRUE;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Advapi32Dll::AdjustTokenPrivileges(HANDLE TokenHandle,
aoqi@0:    BOOL DisableAllPrivileges, PTOKEN_PRIVILEGES NewState, DWORD BufferLength,
aoqi@0:    PTOKEN_PRIVILEGES PreviousState, PDWORD ReturnLength) {
aoqi@0:    assert(initialized && _AdjustTokenPrivileges != NULL,
aoqi@0:      "AdvapiAvailable() not yet called");
aoqi@0:    return _AdjustTokenPrivileges(TokenHandle, DisableAllPrivileges, NewState,
aoqi@0:        BufferLength, PreviousState, ReturnLength);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Advapi32Dll::OpenProcessToken(HANDLE ProcessHandle, DWORD DesiredAccess,
aoqi@0:   PHANDLE TokenHandle) {
aoqi@0:    assert(initialized && _OpenProcessToken != NULL,
aoqi@0:      "AdvapiAvailable() not yet called");
aoqi@0:     return _OpenProcessToken(ProcessHandle, DesiredAccess, TokenHandle);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Advapi32Dll::LookupPrivilegeValue(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID lpLuid) {
aoqi@0:    assert(initialized && _LookupPrivilegeValue != NULL,
aoqi@0:      "AdvapiAvailable() not yet called");
aoqi@0:   return _LookupPrivilegeValue(lpSystemName, lpName, lpLuid);
aoqi@0: }
aoqi@0: 
aoqi@0: BOOL os::Advapi32Dll::AdvapiAvailable() {
aoqi@0:   if (!initialized) {
aoqi@0:     initialize();
aoqi@0:   }
aoqi@0:   return _AdjustTokenPrivileges != NULL &&
aoqi@0:     _OpenProcessToken != NULL &&
aoqi@0:     _LookupPrivilegeValue != NULL;
aoqi@0: }
aoqi@0: 
aoqi@0: #endif
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0: 
aoqi@0: // test the code path in reserve_memory_special() that tries to allocate memory in a single
aoqi@0: // contiguous memory block at a particular address.
aoqi@0: // The test first tries to find a good approximate address to allocate at by using the same
aoqi@0: // method to allocate some memory at any address. The test then tries to allocate memory in
aoqi@0: // the vicinity (not directly after it to avoid possible by-chance use of that location)
aoqi@0: // This is of course only some dodgy assumption, there is no guarantee that the vicinity of
aoqi@0: // the previously allocated memory is available for allocation. The only actual failure
aoqi@0: // that is reported is when the test tries to allocate at a particular location but gets a
aoqi@0: // different valid one. A NULL return value at this point is not considered an error but may
aoqi@0: // be legitimate.
aoqi@0: // If -XX:+VerboseInternalVMTests is enabled, print some explanatory messages.
aoqi@0: void TestReserveMemorySpecial_test() {
aoqi@0:   if (!UseLargePages) {
aoqi@0:     if (VerboseInternalVMTests) {
aoqi@0:       gclog_or_tty->print("Skipping test because large pages are disabled");
aoqi@0:     }
aoqi@0:     return;
aoqi@0:   }
aoqi@0:   // save current value of globals
aoqi@0:   bool old_use_large_pages_individual_allocation = UseLargePagesIndividualAllocation;
aoqi@0:   bool old_use_numa_interleaving = UseNUMAInterleaving;
aoqi@0: 
aoqi@0:   // set globals to make sure we hit the correct code path
aoqi@0:   UseLargePagesIndividualAllocation = UseNUMAInterleaving = false;
aoqi@0: 
aoqi@0:   // do an allocation at an address selected by the OS to get a good one.
aoqi@0:   const size_t large_allocation_size = os::large_page_size() * 4;
aoqi@0:   char* result = os::reserve_memory_special(large_allocation_size, os::large_page_size(), NULL, false);
aoqi@0:   if (result == NULL) {
aoqi@0:     if (VerboseInternalVMTests) {
aoqi@0:       gclog_or_tty->print("Failed to allocate control block with size "SIZE_FORMAT". Skipping remainder of test.",
aoqi@0:         large_allocation_size);
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     os::release_memory_special(result, large_allocation_size);
aoqi@0: 
aoqi@0:     // allocate another page within the recently allocated memory area which seems to be a good location. At least
aoqi@0:     // we managed to get it once.
aoqi@0:     const size_t expected_allocation_size = os::large_page_size();
aoqi@0:     char* expected_location = result + os::large_page_size();
aoqi@0:     char* actual_location = os::reserve_memory_special(expected_allocation_size, os::large_page_size(), expected_location, false);
aoqi@0:     if (actual_location == NULL) {
aoqi@0:       if (VerboseInternalVMTests) {
aoqi@0:         gclog_or_tty->print("Failed to allocate any memory at "PTR_FORMAT" size "SIZE_FORMAT". Skipping remainder of test.",
aoqi@0:           expected_location, large_allocation_size);
aoqi@0:       }
aoqi@0:     } else {
aoqi@0:       // release memory
aoqi@0:       os::release_memory_special(actual_location, expected_allocation_size);
aoqi@0:       // only now check, after releasing any memory to avoid any leaks.
aoqi@0:       assert(actual_location == expected_location,
aoqi@0:         err_msg("Failed to allocate memory at requested location "PTR_FORMAT" of size "SIZE_FORMAT", is "PTR_FORMAT" instead",
aoqi@0:           expected_location, expected_allocation_size, actual_location));
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // restore globals
aoqi@0:   UseLargePagesIndividualAllocation = old_use_large_pages_individual_allocation;
aoqi@0:   UseNUMAInterleaving = old_use_numa_interleaving;
aoqi@0: }
aoqi@0: #endif // PRODUCT
aoqi@0: