Thu, 04 Dec 2008 17:29:56 -0800
6739363: Xcheck jni doesn't check native function arguments
Summary: Fix adds support for verifying arguments with -Xcheck:jni.
Reviewed-by: coleenp
duke@435 | 1 | /* |
xdono@631 | 2 | * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | #ifdef _WIN64 |
duke@435 | 26 | // Must be at least Windows 2000 or XP to use VectoredExceptions |
duke@435 | 27 | #define _WIN32_WINNT 0x500 |
duke@435 | 28 | #endif |
duke@435 | 29 | |
duke@435 | 30 | // do not include precompiled header file |
duke@435 | 31 | # include "incls/_os_windows.cpp.incl" |
duke@435 | 32 | |
duke@435 | 33 | #ifdef _DEBUG |
duke@435 | 34 | #include <crtdbg.h> |
duke@435 | 35 | #endif |
duke@435 | 36 | |
duke@435 | 37 | |
duke@435 | 38 | #include <windows.h> |
duke@435 | 39 | #include <sys/types.h> |
duke@435 | 40 | #include <sys/stat.h> |
duke@435 | 41 | #include <sys/timeb.h> |
duke@435 | 42 | #include <objidl.h> |
duke@435 | 43 | #include <shlobj.h> |
duke@435 | 44 | |
duke@435 | 45 | #include <malloc.h> |
duke@435 | 46 | #include <signal.h> |
duke@435 | 47 | #include <direct.h> |
duke@435 | 48 | #include <errno.h> |
duke@435 | 49 | #include <fcntl.h> |
duke@435 | 50 | #include <io.h> |
duke@435 | 51 | #include <process.h> // For _beginthreadex(), _endthreadex() |
duke@435 | 52 | #include <imagehlp.h> // For os::dll_address_to_function_name |
duke@435 | 53 | |
duke@435 | 54 | /* for enumerating dll libraries */ |
duke@435 | 55 | #include <tlhelp32.h> |
duke@435 | 56 | #include <vdmdbg.h> |
duke@435 | 57 | |
duke@435 | 58 | // for timer info max values which include all bits |
duke@435 | 59 | #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) |
duke@435 | 60 | |
duke@435 | 61 | // For DLL loading/load error detection |
duke@435 | 62 | // Values of PE COFF |
duke@435 | 63 | #define IMAGE_FILE_PTR_TO_SIGNATURE 0x3c |
duke@435 | 64 | #define IMAGE_FILE_SIGNATURE_LENGTH 4 |
duke@435 | 65 | |
duke@435 | 66 | static HANDLE main_process; |
duke@435 | 67 | static HANDLE main_thread; |
duke@435 | 68 | static int main_thread_id; |
duke@435 | 69 | |
duke@435 | 70 | static FILETIME process_creation_time; |
duke@435 | 71 | static FILETIME process_exit_time; |
duke@435 | 72 | static FILETIME process_user_time; |
duke@435 | 73 | static FILETIME process_kernel_time; |
duke@435 | 74 | |
duke@435 | 75 | #ifdef _WIN64 |
duke@435 | 76 | PVOID topLevelVectoredExceptionHandler = NULL; |
duke@435 | 77 | #endif |
duke@435 | 78 | |
duke@435 | 79 | #ifdef _M_IA64 |
duke@435 | 80 | #define __CPU__ ia64 |
duke@435 | 81 | #elif _M_AMD64 |
duke@435 | 82 | #define __CPU__ amd64 |
duke@435 | 83 | #else |
duke@435 | 84 | #define __CPU__ i486 |
duke@435 | 85 | #endif |
duke@435 | 86 | |
duke@435 | 87 | // save DLL module handle, used by GetModuleFileName |
duke@435 | 88 | |
duke@435 | 89 | HINSTANCE vm_lib_handle; |
duke@435 | 90 | static int getLastErrorString(char *buf, size_t len); |
duke@435 | 91 | |
duke@435 | 92 | BOOL WINAPI DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved) { |
duke@435 | 93 | switch (reason) { |
duke@435 | 94 | case DLL_PROCESS_ATTACH: |
duke@435 | 95 | vm_lib_handle = hinst; |
duke@435 | 96 | if(ForceTimeHighResolution) |
duke@435 | 97 | timeBeginPeriod(1L); |
duke@435 | 98 | break; |
duke@435 | 99 | case DLL_PROCESS_DETACH: |
duke@435 | 100 | if(ForceTimeHighResolution) |
duke@435 | 101 | timeEndPeriod(1L); |
duke@435 | 102 | #ifdef _WIN64 |
duke@435 | 103 | if (topLevelVectoredExceptionHandler != NULL) { |
duke@435 | 104 | RemoveVectoredExceptionHandler(topLevelVectoredExceptionHandler); |
duke@435 | 105 | topLevelVectoredExceptionHandler = NULL; |
duke@435 | 106 | } |
duke@435 | 107 | #endif |
duke@435 | 108 | break; |
duke@435 | 109 | default: |
duke@435 | 110 | break; |
duke@435 | 111 | } |
duke@435 | 112 | return true; |
duke@435 | 113 | } |
duke@435 | 114 | |
duke@435 | 115 | static inline double fileTimeAsDouble(FILETIME* time) { |
duke@435 | 116 | const double high = (double) ((unsigned int) ~0); |
duke@435 | 117 | const double split = 10000000.0; |
duke@435 | 118 | double result = (time->dwLowDateTime / split) + |
duke@435 | 119 | time->dwHighDateTime * (high/split); |
duke@435 | 120 | return result; |
duke@435 | 121 | } |
duke@435 | 122 | |
duke@435 | 123 | // Implementation of os |
duke@435 | 124 | |
duke@435 | 125 | bool os::getenv(const char* name, char* buffer, int len) { |
duke@435 | 126 | int result = GetEnvironmentVariable(name, buffer, len); |
duke@435 | 127 | return result > 0 && result < len; |
duke@435 | 128 | } |
duke@435 | 129 | |
duke@435 | 130 | |
duke@435 | 131 | // No setuid programs under Windows. |
duke@435 | 132 | bool os::have_special_privileges() { |
duke@435 | 133 | return false; |
duke@435 | 134 | } |
duke@435 | 135 | |
duke@435 | 136 | |
duke@435 | 137 | // This method is a periodic task to check for misbehaving JNI applications |
duke@435 | 138 | // under CheckJNI, we can add any periodic checks here. |
duke@435 | 139 | // For Windows at the moment does nothing |
duke@435 | 140 | void os::run_periodic_checks() { |
duke@435 | 141 | return; |
duke@435 | 142 | } |
duke@435 | 143 | |
duke@435 | 144 | #ifndef _WIN64 |
duke@435 | 145 | LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo); |
duke@435 | 146 | #endif |
duke@435 | 147 | void os::init_system_properties_values() { |
duke@435 | 148 | /* sysclasspath, java_home, dll_dir */ |
duke@435 | 149 | { |
duke@435 | 150 | char *home_path; |
duke@435 | 151 | char *dll_path; |
duke@435 | 152 | char *pslash; |
duke@435 | 153 | char *bin = "\\bin"; |
duke@435 | 154 | char home_dir[MAX_PATH]; |
duke@435 | 155 | |
duke@435 | 156 | if (!getenv("_ALT_JAVA_HOME_DIR", home_dir, MAX_PATH)) { |
duke@435 | 157 | os::jvm_path(home_dir, sizeof(home_dir)); |
duke@435 | 158 | // Found the full path to jvm[_g].dll. |
duke@435 | 159 | // Now cut the path to <java_home>/jre if we can. |
duke@435 | 160 | *(strrchr(home_dir, '\\')) = '\0'; /* get rid of \jvm.dll */ |
duke@435 | 161 | pslash = strrchr(home_dir, '\\'); |
duke@435 | 162 | if (pslash != NULL) { |
duke@435 | 163 | *pslash = '\0'; /* get rid of \{client|server} */ |
duke@435 | 164 | pslash = strrchr(home_dir, '\\'); |
duke@435 | 165 | if (pslash != NULL) |
duke@435 | 166 | *pslash = '\0'; /* get rid of \bin */ |
duke@435 | 167 | } |
duke@435 | 168 | } |
duke@435 | 169 | |
duke@435 | 170 | home_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + 1); |
duke@435 | 171 | if (home_path == NULL) |
duke@435 | 172 | return; |
duke@435 | 173 | strcpy(home_path, home_dir); |
duke@435 | 174 | Arguments::set_java_home(home_path); |
duke@435 | 175 | |
duke@435 | 176 | dll_path = NEW_C_HEAP_ARRAY(char, strlen(home_dir) + strlen(bin) + 1); |
duke@435 | 177 | if (dll_path == NULL) |
duke@435 | 178 | return; |
duke@435 | 179 | strcpy(dll_path, home_dir); |
duke@435 | 180 | strcat(dll_path, bin); |
duke@435 | 181 | Arguments::set_dll_dir(dll_path); |
duke@435 | 182 | |
duke@435 | 183 | if (!set_boot_path('\\', ';')) |
duke@435 | 184 | return; |
duke@435 | 185 | } |
duke@435 | 186 | |
duke@435 | 187 | /* library_path */ |
duke@435 | 188 | #define EXT_DIR "\\lib\\ext" |
duke@435 | 189 | #define BIN_DIR "\\bin" |
duke@435 | 190 | #define PACKAGE_DIR "\\Sun\\Java" |
duke@435 | 191 | { |
duke@435 | 192 | /* Win32 library search order (See the documentation for LoadLibrary): |
duke@435 | 193 | * |
duke@435 | 194 | * 1. The directory from which application is loaded. |
duke@435 | 195 | * 2. The current directory |
duke@435 | 196 | * 3. The system wide Java Extensions directory (Java only) |
duke@435 | 197 | * 4. System directory (GetSystemDirectory) |
duke@435 | 198 | * 5. Windows directory (GetWindowsDirectory) |
duke@435 | 199 | * 6. The PATH environment variable |
duke@435 | 200 | */ |
duke@435 | 201 | |
duke@435 | 202 | char *library_path; |
duke@435 | 203 | char tmp[MAX_PATH]; |
duke@435 | 204 | char *path_str = ::getenv("PATH"); |
duke@435 | 205 | |
duke@435 | 206 | library_path = NEW_C_HEAP_ARRAY(char, MAX_PATH * 5 + sizeof(PACKAGE_DIR) + |
duke@435 | 207 | sizeof(BIN_DIR) + (path_str ? strlen(path_str) : 0) + 10); |
duke@435 | 208 | |
duke@435 | 209 | library_path[0] = '\0'; |
duke@435 | 210 | |
duke@435 | 211 | GetModuleFileName(NULL, tmp, sizeof(tmp)); |
duke@435 | 212 | *(strrchr(tmp, '\\')) = '\0'; |
duke@435 | 213 | strcat(library_path, tmp); |
duke@435 | 214 | |
duke@435 | 215 | strcat(library_path, ";."); |
duke@435 | 216 | |
duke@435 | 217 | GetWindowsDirectory(tmp, sizeof(tmp)); |
duke@435 | 218 | strcat(library_path, ";"); |
duke@435 | 219 | strcat(library_path, tmp); |
duke@435 | 220 | strcat(library_path, PACKAGE_DIR BIN_DIR); |
duke@435 | 221 | |
duke@435 | 222 | GetSystemDirectory(tmp, sizeof(tmp)); |
duke@435 | 223 | strcat(library_path, ";"); |
duke@435 | 224 | strcat(library_path, tmp); |
duke@435 | 225 | |
duke@435 | 226 | GetWindowsDirectory(tmp, sizeof(tmp)); |
duke@435 | 227 | strcat(library_path, ";"); |
duke@435 | 228 | strcat(library_path, tmp); |
duke@435 | 229 | |
duke@435 | 230 | if (path_str) { |
duke@435 | 231 | strcat(library_path, ";"); |
duke@435 | 232 | strcat(library_path, path_str); |
duke@435 | 233 | } |
duke@435 | 234 | |
duke@435 | 235 | Arguments::set_library_path(library_path); |
duke@435 | 236 | FREE_C_HEAP_ARRAY(char, library_path); |
duke@435 | 237 | } |
duke@435 | 238 | |
duke@435 | 239 | /* Default extensions directory */ |
duke@435 | 240 | { |
duke@435 | 241 | char path[MAX_PATH]; |
duke@435 | 242 | char buf[2 * MAX_PATH + 2 * sizeof(EXT_DIR) + sizeof(PACKAGE_DIR) + 1]; |
duke@435 | 243 | GetWindowsDirectory(path, MAX_PATH); |
duke@435 | 244 | sprintf(buf, "%s%s;%s%s%s", Arguments::get_java_home(), EXT_DIR, |
duke@435 | 245 | path, PACKAGE_DIR, EXT_DIR); |
duke@435 | 246 | Arguments::set_ext_dirs(buf); |
duke@435 | 247 | } |
duke@435 | 248 | #undef EXT_DIR |
duke@435 | 249 | #undef BIN_DIR |
duke@435 | 250 | #undef PACKAGE_DIR |
duke@435 | 251 | |
duke@435 | 252 | /* Default endorsed standards directory. */ |
duke@435 | 253 | { |
duke@435 | 254 | #define ENDORSED_DIR "\\lib\\endorsed" |
duke@435 | 255 | size_t len = strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR); |
duke@435 | 256 | char * buf = NEW_C_HEAP_ARRAY(char, len); |
duke@435 | 257 | sprintf(buf, "%s%s", Arguments::get_java_home(), ENDORSED_DIR); |
duke@435 | 258 | Arguments::set_endorsed_dirs(buf); |
duke@435 | 259 | #undef ENDORSED_DIR |
duke@435 | 260 | } |
duke@435 | 261 | |
duke@435 | 262 | #ifndef _WIN64 |
duke@435 | 263 | SetUnhandledExceptionFilter(Handle_FLT_Exception); |
duke@435 | 264 | #endif |
duke@435 | 265 | |
duke@435 | 266 | // Done |
duke@435 | 267 | return; |
duke@435 | 268 | } |
duke@435 | 269 | |
duke@435 | 270 | void os::breakpoint() { |
duke@435 | 271 | DebugBreak(); |
duke@435 | 272 | } |
duke@435 | 273 | |
duke@435 | 274 | // Invoked from the BREAKPOINT Macro |
duke@435 | 275 | extern "C" void breakpoint() { |
duke@435 | 276 | os::breakpoint(); |
duke@435 | 277 | } |
duke@435 | 278 | |
duke@435 | 279 | // Returns an estimate of the current stack pointer. Result must be guaranteed |
duke@435 | 280 | // to point into the calling threads stack, and be no lower than the current |
duke@435 | 281 | // stack pointer. |
duke@435 | 282 | |
duke@435 | 283 | address os::current_stack_pointer() { |
duke@435 | 284 | int dummy; |
duke@435 | 285 | address sp = (address)&dummy; |
duke@435 | 286 | return sp; |
duke@435 | 287 | } |
duke@435 | 288 | |
duke@435 | 289 | // os::current_stack_base() |
duke@435 | 290 | // |
duke@435 | 291 | // Returns the base of the stack, which is the stack's |
duke@435 | 292 | // starting address. This function must be called |
duke@435 | 293 | // while running on the stack of the thread being queried. |
duke@435 | 294 | |
duke@435 | 295 | address os::current_stack_base() { |
duke@435 | 296 | MEMORY_BASIC_INFORMATION minfo; |
duke@435 | 297 | address stack_bottom; |
duke@435 | 298 | size_t stack_size; |
duke@435 | 299 | |
duke@435 | 300 | VirtualQuery(&minfo, &minfo, sizeof(minfo)); |
duke@435 | 301 | stack_bottom = (address)minfo.AllocationBase; |
duke@435 | 302 | stack_size = minfo.RegionSize; |
duke@435 | 303 | |
duke@435 | 304 | // Add up the sizes of all the regions with the same |
duke@435 | 305 | // AllocationBase. |
duke@435 | 306 | while( 1 ) |
duke@435 | 307 | { |
duke@435 | 308 | VirtualQuery(stack_bottom+stack_size, &minfo, sizeof(minfo)); |
duke@435 | 309 | if ( stack_bottom == (address)minfo.AllocationBase ) |
duke@435 | 310 | stack_size += minfo.RegionSize; |
duke@435 | 311 | else |
duke@435 | 312 | break; |
duke@435 | 313 | } |
duke@435 | 314 | |
duke@435 | 315 | #ifdef _M_IA64 |
duke@435 | 316 | // IA64 has memory and register stacks |
duke@435 | 317 | stack_size = stack_size / 2; |
duke@435 | 318 | #endif |
duke@435 | 319 | return stack_bottom + stack_size; |
duke@435 | 320 | } |
duke@435 | 321 | |
duke@435 | 322 | size_t os::current_stack_size() { |
duke@435 | 323 | size_t sz; |
duke@435 | 324 | MEMORY_BASIC_INFORMATION minfo; |
duke@435 | 325 | VirtualQuery(&minfo, &minfo, sizeof(minfo)); |
duke@435 | 326 | sz = (size_t)os::current_stack_base() - (size_t)minfo.AllocationBase; |
duke@435 | 327 | return sz; |
duke@435 | 328 | } |
duke@435 | 329 | |
duke@435 | 330 | |
duke@435 | 331 | LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo); |
duke@435 | 332 | |
duke@435 | 333 | // Thread start routine for all new Java threads |
duke@435 | 334 | static unsigned __stdcall java_start(Thread* thread) { |
duke@435 | 335 | // Try to randomize the cache line index of hot stack frames. |
duke@435 | 336 | // This helps when threads of the same stack traces evict each other's |
duke@435 | 337 | // cache lines. The threads can be either from the same JVM instance, or |
duke@435 | 338 | // from different JVM instances. The benefit is especially true for |
duke@435 | 339 | // processors with hyperthreading technology. |
duke@435 | 340 | static int counter = 0; |
duke@435 | 341 | int pid = os::current_process_id(); |
duke@435 | 342 | _alloca(((pid ^ counter++) & 7) * 128); |
duke@435 | 343 | |
duke@435 | 344 | OSThread* osthr = thread->osthread(); |
duke@435 | 345 | assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); |
duke@435 | 346 | |
duke@435 | 347 | if (UseNUMA) { |
duke@435 | 348 | int lgrp_id = os::numa_get_group_id(); |
duke@435 | 349 | if (lgrp_id != -1) { |
duke@435 | 350 | thread->set_lgrp_id(lgrp_id); |
duke@435 | 351 | } |
duke@435 | 352 | } |
duke@435 | 353 | |
duke@435 | 354 | |
duke@435 | 355 | if (UseVectoredExceptions) { |
duke@435 | 356 | // If we are using vectored exception we don't need to set a SEH |
duke@435 | 357 | thread->run(); |
duke@435 | 358 | } |
duke@435 | 359 | else { |
duke@435 | 360 | // Install a win32 structured exception handler around every thread created |
duke@435 | 361 | // by VM, so VM can genrate error dump when an exception occurred in non- |
duke@435 | 362 | // Java thread (e.g. VM thread). |
duke@435 | 363 | __try { |
duke@435 | 364 | thread->run(); |
duke@435 | 365 | } __except(topLevelExceptionFilter( |
duke@435 | 366 | (_EXCEPTION_POINTERS*)_exception_info())) { |
duke@435 | 367 | // Nothing to do. |
duke@435 | 368 | } |
duke@435 | 369 | } |
duke@435 | 370 | |
duke@435 | 371 | // One less thread is executing |
duke@435 | 372 | // When the VMThread gets here, the main thread may have already exited |
duke@435 | 373 | // which frees the CodeHeap containing the Atomic::add code |
duke@435 | 374 | if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { |
duke@435 | 375 | Atomic::dec_ptr((intptr_t*)&os::win32::_os_thread_count); |
duke@435 | 376 | } |
duke@435 | 377 | |
duke@435 | 378 | return 0; |
duke@435 | 379 | } |
duke@435 | 380 | |
duke@435 | 381 | static OSThread* create_os_thread(Thread* thread, HANDLE thread_handle, int thread_id) { |
duke@435 | 382 | // Allocate the OSThread object |
duke@435 | 383 | OSThread* osthread = new OSThread(NULL, NULL); |
duke@435 | 384 | if (osthread == NULL) return NULL; |
duke@435 | 385 | |
duke@435 | 386 | // Initialize support for Java interrupts |
duke@435 | 387 | HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); |
duke@435 | 388 | if (interrupt_event == NULL) { |
duke@435 | 389 | delete osthread; |
duke@435 | 390 | return NULL; |
duke@435 | 391 | } |
duke@435 | 392 | osthread->set_interrupt_event(interrupt_event); |
duke@435 | 393 | |
duke@435 | 394 | // Store info on the Win32 thread into the OSThread |
duke@435 | 395 | osthread->set_thread_handle(thread_handle); |
duke@435 | 396 | osthread->set_thread_id(thread_id); |
duke@435 | 397 | |
duke@435 | 398 | if (UseNUMA) { |
duke@435 | 399 | int lgrp_id = os::numa_get_group_id(); |
duke@435 | 400 | if (lgrp_id != -1) { |
duke@435 | 401 | thread->set_lgrp_id(lgrp_id); |
duke@435 | 402 | } |
duke@435 | 403 | } |
duke@435 | 404 | |
duke@435 | 405 | // Initial thread state is INITIALIZED, not SUSPENDED |
duke@435 | 406 | osthread->set_state(INITIALIZED); |
duke@435 | 407 | |
duke@435 | 408 | return osthread; |
duke@435 | 409 | } |
duke@435 | 410 | |
duke@435 | 411 | |
duke@435 | 412 | bool os::create_attached_thread(JavaThread* thread) { |
duke@435 | 413 | #ifdef ASSERT |
duke@435 | 414 | thread->verify_not_published(); |
duke@435 | 415 | #endif |
duke@435 | 416 | HANDLE thread_h; |
duke@435 | 417 | if (!DuplicateHandle(main_process, GetCurrentThread(), GetCurrentProcess(), |
duke@435 | 418 | &thread_h, THREAD_ALL_ACCESS, false, 0)) { |
duke@435 | 419 | fatal("DuplicateHandle failed\n"); |
duke@435 | 420 | } |
duke@435 | 421 | OSThread* osthread = create_os_thread(thread, thread_h, |
duke@435 | 422 | (int)current_thread_id()); |
duke@435 | 423 | if (osthread == NULL) { |
duke@435 | 424 | return false; |
duke@435 | 425 | } |
duke@435 | 426 | |
duke@435 | 427 | // Initial thread state is RUNNABLE |
duke@435 | 428 | osthread->set_state(RUNNABLE); |
duke@435 | 429 | |
duke@435 | 430 | thread->set_osthread(osthread); |
duke@435 | 431 | return true; |
duke@435 | 432 | } |
duke@435 | 433 | |
duke@435 | 434 | bool os::create_main_thread(JavaThread* thread) { |
duke@435 | 435 | #ifdef ASSERT |
duke@435 | 436 | thread->verify_not_published(); |
duke@435 | 437 | #endif |
duke@435 | 438 | if (_starting_thread == NULL) { |
duke@435 | 439 | _starting_thread = create_os_thread(thread, main_thread, main_thread_id); |
duke@435 | 440 | if (_starting_thread == NULL) { |
duke@435 | 441 | return false; |
duke@435 | 442 | } |
duke@435 | 443 | } |
duke@435 | 444 | |
duke@435 | 445 | // The primordial thread is runnable from the start) |
duke@435 | 446 | _starting_thread->set_state(RUNNABLE); |
duke@435 | 447 | |
duke@435 | 448 | thread->set_osthread(_starting_thread); |
duke@435 | 449 | return true; |
duke@435 | 450 | } |
duke@435 | 451 | |
duke@435 | 452 | // Allocate and initialize a new OSThread |
duke@435 | 453 | bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { |
duke@435 | 454 | unsigned thread_id; |
duke@435 | 455 | |
duke@435 | 456 | // Allocate the OSThread object |
duke@435 | 457 | OSThread* osthread = new OSThread(NULL, NULL); |
duke@435 | 458 | if (osthread == NULL) { |
duke@435 | 459 | return false; |
duke@435 | 460 | } |
duke@435 | 461 | |
duke@435 | 462 | // Initialize support for Java interrupts |
duke@435 | 463 | HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL); |
duke@435 | 464 | if (interrupt_event == NULL) { |
duke@435 | 465 | delete osthread; |
duke@435 | 466 | return NULL; |
duke@435 | 467 | } |
duke@435 | 468 | osthread->set_interrupt_event(interrupt_event); |
duke@435 | 469 | osthread->set_interrupted(false); |
duke@435 | 470 | |
duke@435 | 471 | thread->set_osthread(osthread); |
duke@435 | 472 | |
duke@435 | 473 | if (stack_size == 0) { |
duke@435 | 474 | switch (thr_type) { |
duke@435 | 475 | case os::java_thread: |
duke@435 | 476 | // Java threads use ThreadStackSize which default value can be changed with the flag -Xss |
duke@435 | 477 | if (JavaThread::stack_size_at_create() > 0) |
duke@435 | 478 | stack_size = JavaThread::stack_size_at_create(); |
duke@435 | 479 | break; |
duke@435 | 480 | case os::compiler_thread: |
duke@435 | 481 | if (CompilerThreadStackSize > 0) { |
duke@435 | 482 | stack_size = (size_t)(CompilerThreadStackSize * K); |
duke@435 | 483 | break; |
duke@435 | 484 | } // else fall through: |
duke@435 | 485 | // use VMThreadStackSize if CompilerThreadStackSize is not defined |
duke@435 | 486 | case os::vm_thread: |
duke@435 | 487 | case os::pgc_thread: |
duke@435 | 488 | case os::cgc_thread: |
duke@435 | 489 | case os::watcher_thread: |
duke@435 | 490 | if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); |
duke@435 | 491 | break; |
duke@435 | 492 | } |
duke@435 | 493 | } |
duke@435 | 494 | |
duke@435 | 495 | // Create the Win32 thread |
duke@435 | 496 | // |
duke@435 | 497 | // Contrary to what MSDN document says, "stack_size" in _beginthreadex() |
duke@435 | 498 | // does not specify stack size. Instead, it specifies the size of |
duke@435 | 499 | // initially committed space. The stack size is determined by |
duke@435 | 500 | // PE header in the executable. If the committed "stack_size" is larger |
duke@435 | 501 | // than default value in the PE header, the stack is rounded up to the |
duke@435 | 502 | // nearest multiple of 1MB. For example if the launcher has default |
duke@435 | 503 | // stack size of 320k, specifying any size less than 320k does not |
duke@435 | 504 | // affect the actual stack size at all, it only affects the initial |
duke@435 | 505 | // commitment. On the other hand, specifying 'stack_size' larger than |
duke@435 | 506 | // default value may cause significant increase in memory usage, because |
duke@435 | 507 | // not only the stack space will be rounded up to MB, but also the |
duke@435 | 508 | // entire space is committed upfront. |
duke@435 | 509 | // |
duke@435 | 510 | // Finally Windows XP added a new flag 'STACK_SIZE_PARAM_IS_A_RESERVATION' |
duke@435 | 511 | // for CreateThread() that can treat 'stack_size' as stack size. However we |
duke@435 | 512 | // are not supposed to call CreateThread() directly according to MSDN |
duke@435 | 513 | // document because JVM uses C runtime library. The good news is that the |
duke@435 | 514 | // flag appears to work with _beginthredex() as well. |
duke@435 | 515 | |
duke@435 | 516 | #ifndef STACK_SIZE_PARAM_IS_A_RESERVATION |
duke@435 | 517 | #define STACK_SIZE_PARAM_IS_A_RESERVATION (0x10000) |
duke@435 | 518 | #endif |
duke@435 | 519 | |
duke@435 | 520 | HANDLE thread_handle = |
duke@435 | 521 | (HANDLE)_beginthreadex(NULL, |
duke@435 | 522 | (unsigned)stack_size, |
duke@435 | 523 | (unsigned (__stdcall *)(void*)) java_start, |
duke@435 | 524 | thread, |
duke@435 | 525 | CREATE_SUSPENDED | STACK_SIZE_PARAM_IS_A_RESERVATION, |
duke@435 | 526 | &thread_id); |
duke@435 | 527 | if (thread_handle == NULL) { |
duke@435 | 528 | // perhaps STACK_SIZE_PARAM_IS_A_RESERVATION is not supported, try again |
duke@435 | 529 | // without the flag. |
duke@435 | 530 | thread_handle = |
duke@435 | 531 | (HANDLE)_beginthreadex(NULL, |
duke@435 | 532 | (unsigned)stack_size, |
duke@435 | 533 | (unsigned (__stdcall *)(void*)) java_start, |
duke@435 | 534 | thread, |
duke@435 | 535 | CREATE_SUSPENDED, |
duke@435 | 536 | &thread_id); |
duke@435 | 537 | } |
duke@435 | 538 | if (thread_handle == NULL) { |
duke@435 | 539 | // Need to clean up stuff we've allocated so far |
duke@435 | 540 | CloseHandle(osthread->interrupt_event()); |
duke@435 | 541 | thread->set_osthread(NULL); |
duke@435 | 542 | delete osthread; |
duke@435 | 543 | return NULL; |
duke@435 | 544 | } |
duke@435 | 545 | |
duke@435 | 546 | Atomic::inc_ptr((intptr_t*)&os::win32::_os_thread_count); |
duke@435 | 547 | |
duke@435 | 548 | // Store info on the Win32 thread into the OSThread |
duke@435 | 549 | osthread->set_thread_handle(thread_handle); |
duke@435 | 550 | osthread->set_thread_id(thread_id); |
duke@435 | 551 | |
duke@435 | 552 | // Initial thread state is INITIALIZED, not SUSPENDED |
duke@435 | 553 | osthread->set_state(INITIALIZED); |
duke@435 | 554 | |
duke@435 | 555 | // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain |
duke@435 | 556 | return true; |
duke@435 | 557 | } |
duke@435 | 558 | |
duke@435 | 559 | |
duke@435 | 560 | // Free Win32 resources related to the OSThread |
duke@435 | 561 | void os::free_thread(OSThread* osthread) { |
duke@435 | 562 | assert(osthread != NULL, "osthread not set"); |
duke@435 | 563 | CloseHandle(osthread->thread_handle()); |
duke@435 | 564 | CloseHandle(osthread->interrupt_event()); |
duke@435 | 565 | delete osthread; |
duke@435 | 566 | } |
duke@435 | 567 | |
duke@435 | 568 | |
duke@435 | 569 | static int has_performance_count = 0; |
duke@435 | 570 | static jlong first_filetime; |
duke@435 | 571 | static jlong initial_performance_count; |
duke@435 | 572 | static jlong performance_frequency; |
duke@435 | 573 | |
duke@435 | 574 | |
duke@435 | 575 | jlong as_long(LARGE_INTEGER x) { |
duke@435 | 576 | jlong result = 0; // initialization to avoid warning |
duke@435 | 577 | set_high(&result, x.HighPart); |
duke@435 | 578 | set_low(&result, x.LowPart); |
duke@435 | 579 | return result; |
duke@435 | 580 | } |
duke@435 | 581 | |
duke@435 | 582 | |
duke@435 | 583 | jlong os::elapsed_counter() { |
duke@435 | 584 | LARGE_INTEGER count; |
duke@435 | 585 | if (has_performance_count) { |
duke@435 | 586 | QueryPerformanceCounter(&count); |
duke@435 | 587 | return as_long(count) - initial_performance_count; |
duke@435 | 588 | } else { |
duke@435 | 589 | FILETIME wt; |
duke@435 | 590 | GetSystemTimeAsFileTime(&wt); |
duke@435 | 591 | return (jlong_from(wt.dwHighDateTime, wt.dwLowDateTime) - first_filetime); |
duke@435 | 592 | } |
duke@435 | 593 | } |
duke@435 | 594 | |
duke@435 | 595 | |
duke@435 | 596 | jlong os::elapsed_frequency() { |
duke@435 | 597 | if (has_performance_count) { |
duke@435 | 598 | return performance_frequency; |
duke@435 | 599 | } else { |
duke@435 | 600 | // the FILETIME time is the number of 100-nanosecond intervals since January 1,1601. |
duke@435 | 601 | return 10000000; |
duke@435 | 602 | } |
duke@435 | 603 | } |
duke@435 | 604 | |
duke@435 | 605 | |
duke@435 | 606 | julong os::available_memory() { |
duke@435 | 607 | return win32::available_memory(); |
duke@435 | 608 | } |
duke@435 | 609 | |
duke@435 | 610 | julong os::win32::available_memory() { |
duke@435 | 611 | // FIXME: GlobalMemoryStatus() may return incorrect value if total memory |
duke@435 | 612 | // is larger than 4GB |
duke@435 | 613 | MEMORYSTATUS ms; |
duke@435 | 614 | GlobalMemoryStatus(&ms); |
duke@435 | 615 | |
duke@435 | 616 | return (julong)ms.dwAvailPhys; |
duke@435 | 617 | } |
duke@435 | 618 | |
duke@435 | 619 | julong os::physical_memory() { |
duke@435 | 620 | return win32::physical_memory(); |
duke@435 | 621 | } |
duke@435 | 622 | |
duke@435 | 623 | julong os::allocatable_physical_memory(julong size) { |
phh@455 | 624 | #ifdef _LP64 |
phh@455 | 625 | return size; |
phh@455 | 626 | #else |
phh@455 | 627 | // Limit to 1400m because of the 2gb address space wall |
duke@435 | 628 | return MIN2(size, (julong)1400*M); |
phh@455 | 629 | #endif |
duke@435 | 630 | } |
duke@435 | 631 | |
duke@435 | 632 | // VC6 lacks DWORD_PTR |
duke@435 | 633 | #if _MSC_VER < 1300 |
duke@435 | 634 | typedef UINT_PTR DWORD_PTR; |
duke@435 | 635 | #endif |
duke@435 | 636 | |
duke@435 | 637 | int os::active_processor_count() { |
duke@435 | 638 | DWORD_PTR lpProcessAffinityMask = 0; |
duke@435 | 639 | DWORD_PTR lpSystemAffinityMask = 0; |
duke@435 | 640 | int proc_count = processor_count(); |
duke@435 | 641 | if (proc_count <= sizeof(UINT_PTR) * BitsPerByte && |
duke@435 | 642 | GetProcessAffinityMask(GetCurrentProcess(), &lpProcessAffinityMask, &lpSystemAffinityMask)) { |
duke@435 | 643 | // Nof active processors is number of bits in process affinity mask |
duke@435 | 644 | int bitcount = 0; |
duke@435 | 645 | while (lpProcessAffinityMask != 0) { |
duke@435 | 646 | lpProcessAffinityMask = lpProcessAffinityMask & (lpProcessAffinityMask-1); |
duke@435 | 647 | bitcount++; |
duke@435 | 648 | } |
duke@435 | 649 | return bitcount; |
duke@435 | 650 | } else { |
duke@435 | 651 | return proc_count; |
duke@435 | 652 | } |
duke@435 | 653 | } |
duke@435 | 654 | |
duke@435 | 655 | bool os::distribute_processes(uint length, uint* distribution) { |
duke@435 | 656 | // Not yet implemented. |
duke@435 | 657 | return false; |
duke@435 | 658 | } |
duke@435 | 659 | |
duke@435 | 660 | bool os::bind_to_processor(uint processor_id) { |
duke@435 | 661 | // Not yet implemented. |
duke@435 | 662 | return false; |
duke@435 | 663 | } |
duke@435 | 664 | |
duke@435 | 665 | static void initialize_performance_counter() { |
duke@435 | 666 | LARGE_INTEGER count; |
duke@435 | 667 | if (QueryPerformanceFrequency(&count)) { |
duke@435 | 668 | has_performance_count = 1; |
duke@435 | 669 | performance_frequency = as_long(count); |
duke@435 | 670 | QueryPerformanceCounter(&count); |
duke@435 | 671 | initial_performance_count = as_long(count); |
duke@435 | 672 | } else { |
duke@435 | 673 | has_performance_count = 0; |
duke@435 | 674 | FILETIME wt; |
duke@435 | 675 | GetSystemTimeAsFileTime(&wt); |
duke@435 | 676 | first_filetime = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); |
duke@435 | 677 | } |
duke@435 | 678 | } |
duke@435 | 679 | |
duke@435 | 680 | |
duke@435 | 681 | double os::elapsedTime() { |
duke@435 | 682 | return (double) elapsed_counter() / (double) elapsed_frequency(); |
duke@435 | 683 | } |
duke@435 | 684 | |
duke@435 | 685 | |
duke@435 | 686 | // Windows format: |
duke@435 | 687 | // The FILETIME structure is a 64-bit value representing the number of 100-nanosecond intervals since January 1, 1601. |
duke@435 | 688 | // Java format: |
duke@435 | 689 | // Java standards require the number of milliseconds since 1/1/1970 |
duke@435 | 690 | |
duke@435 | 691 | // Constant offset - calculated using offset() |
duke@435 | 692 | static jlong _offset = 116444736000000000; |
duke@435 | 693 | // Fake time counter for reproducible results when debugging |
duke@435 | 694 | static jlong fake_time = 0; |
duke@435 | 695 | |
duke@435 | 696 | #ifdef ASSERT |
duke@435 | 697 | // Just to be safe, recalculate the offset in debug mode |
duke@435 | 698 | static jlong _calculated_offset = 0; |
duke@435 | 699 | static int _has_calculated_offset = 0; |
duke@435 | 700 | |
duke@435 | 701 | jlong offset() { |
duke@435 | 702 | if (_has_calculated_offset) return _calculated_offset; |
duke@435 | 703 | SYSTEMTIME java_origin; |
duke@435 | 704 | java_origin.wYear = 1970; |
duke@435 | 705 | java_origin.wMonth = 1; |
duke@435 | 706 | java_origin.wDayOfWeek = 0; // ignored |
duke@435 | 707 | java_origin.wDay = 1; |
duke@435 | 708 | java_origin.wHour = 0; |
duke@435 | 709 | java_origin.wMinute = 0; |
duke@435 | 710 | java_origin.wSecond = 0; |
duke@435 | 711 | java_origin.wMilliseconds = 0; |
duke@435 | 712 | FILETIME jot; |
duke@435 | 713 | if (!SystemTimeToFileTime(&java_origin, &jot)) { |
duke@435 | 714 | fatal1("Error = %d\nWindows error", GetLastError()); |
duke@435 | 715 | } |
duke@435 | 716 | _calculated_offset = jlong_from(jot.dwHighDateTime, jot.dwLowDateTime); |
duke@435 | 717 | _has_calculated_offset = 1; |
duke@435 | 718 | assert(_calculated_offset == _offset, "Calculated and constant time offsets must be equal"); |
duke@435 | 719 | return _calculated_offset; |
duke@435 | 720 | } |
duke@435 | 721 | #else |
duke@435 | 722 | jlong offset() { |
duke@435 | 723 | return _offset; |
duke@435 | 724 | } |
duke@435 | 725 | #endif |
duke@435 | 726 | |
duke@435 | 727 | jlong windows_to_java_time(FILETIME wt) { |
duke@435 | 728 | jlong a = jlong_from(wt.dwHighDateTime, wt.dwLowDateTime); |
duke@435 | 729 | return (a - offset()) / 10000; |
duke@435 | 730 | } |
duke@435 | 731 | |
duke@435 | 732 | FILETIME java_to_windows_time(jlong l) { |
duke@435 | 733 | jlong a = (l * 10000) + offset(); |
duke@435 | 734 | FILETIME result; |
duke@435 | 735 | result.dwHighDateTime = high(a); |
duke@435 | 736 | result.dwLowDateTime = low(a); |
duke@435 | 737 | return result; |
duke@435 | 738 | } |
duke@435 | 739 | |
ysr@777 | 740 | // For now, we say that Windows does not support vtime. I have no idea |
ysr@777 | 741 | // whether it can actually be made to (DLD, 9/13/05). |
ysr@777 | 742 | |
ysr@777 | 743 | bool os::supports_vtime() { return false; } |
ysr@777 | 744 | bool os::enable_vtime() { return false; } |
ysr@777 | 745 | bool os::vtime_enabled() { return false; } |
ysr@777 | 746 | double os::elapsedVTime() { |
ysr@777 | 747 | // better than nothing, but not much |
ysr@777 | 748 | return elapsedTime(); |
ysr@777 | 749 | } |
ysr@777 | 750 | |
duke@435 | 751 | jlong os::javaTimeMillis() { |
duke@435 | 752 | if (UseFakeTimers) { |
duke@435 | 753 | return fake_time++; |
duke@435 | 754 | } else { |
sbohne@496 | 755 | FILETIME wt; |
sbohne@496 | 756 | GetSystemTimeAsFileTime(&wt); |
sbohne@496 | 757 | return windows_to_java_time(wt); |
duke@435 | 758 | } |
duke@435 | 759 | } |
duke@435 | 760 | |
duke@435 | 761 | #define NANOS_PER_SEC CONST64(1000000000) |
duke@435 | 762 | #define NANOS_PER_MILLISEC 1000000 |
duke@435 | 763 | jlong os::javaTimeNanos() { |
duke@435 | 764 | if (!has_performance_count) { |
duke@435 | 765 | return javaTimeMillis() * NANOS_PER_MILLISEC; // the best we can do. |
duke@435 | 766 | } else { |
duke@435 | 767 | LARGE_INTEGER current_count; |
duke@435 | 768 | QueryPerformanceCounter(¤t_count); |
duke@435 | 769 | double current = as_long(current_count); |
duke@435 | 770 | double freq = performance_frequency; |
duke@435 | 771 | jlong time = (jlong)((current/freq) * NANOS_PER_SEC); |
duke@435 | 772 | return time; |
duke@435 | 773 | } |
duke@435 | 774 | } |
duke@435 | 775 | |
duke@435 | 776 | void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { |
duke@435 | 777 | if (!has_performance_count) { |
duke@435 | 778 | // javaTimeMillis() doesn't have much percision, |
duke@435 | 779 | // but it is not going to wrap -- so all 64 bits |
duke@435 | 780 | info_ptr->max_value = ALL_64_BITS; |
duke@435 | 781 | |
duke@435 | 782 | // this is a wall clock timer, so may skip |
duke@435 | 783 | info_ptr->may_skip_backward = true; |
duke@435 | 784 | info_ptr->may_skip_forward = true; |
duke@435 | 785 | } else { |
duke@435 | 786 | jlong freq = performance_frequency; |
duke@435 | 787 | if (freq < NANOS_PER_SEC) { |
duke@435 | 788 | // the performance counter is 64 bits and we will |
duke@435 | 789 | // be multiplying it -- so no wrap in 64 bits |
duke@435 | 790 | info_ptr->max_value = ALL_64_BITS; |
duke@435 | 791 | } else if (freq > NANOS_PER_SEC) { |
duke@435 | 792 | // use the max value the counter can reach to |
duke@435 | 793 | // determine the max value which could be returned |
duke@435 | 794 | julong max_counter = (julong)ALL_64_BITS; |
duke@435 | 795 | info_ptr->max_value = (jlong)(max_counter / (freq / NANOS_PER_SEC)); |
duke@435 | 796 | } else { |
duke@435 | 797 | // the performance counter is 64 bits and we will |
duke@435 | 798 | // be using it directly -- so no wrap in 64 bits |
duke@435 | 799 | info_ptr->max_value = ALL_64_BITS; |
duke@435 | 800 | } |
duke@435 | 801 | |
duke@435 | 802 | // using a counter, so no skipping |
duke@435 | 803 | info_ptr->may_skip_backward = false; |
duke@435 | 804 | info_ptr->may_skip_forward = false; |
duke@435 | 805 | } |
duke@435 | 806 | info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time |
duke@435 | 807 | } |
duke@435 | 808 | |
duke@435 | 809 | char* os::local_time_string(char *buf, size_t buflen) { |
duke@435 | 810 | SYSTEMTIME st; |
duke@435 | 811 | GetLocalTime(&st); |
duke@435 | 812 | jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", |
duke@435 | 813 | st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); |
duke@435 | 814 | return buf; |
duke@435 | 815 | } |
duke@435 | 816 | |
duke@435 | 817 | bool os::getTimesSecs(double* process_real_time, |
duke@435 | 818 | double* process_user_time, |
duke@435 | 819 | double* process_system_time) { |
duke@435 | 820 | HANDLE h_process = GetCurrentProcess(); |
duke@435 | 821 | FILETIME create_time, exit_time, kernel_time, user_time; |
duke@435 | 822 | BOOL result = GetProcessTimes(h_process, |
duke@435 | 823 | &create_time, |
duke@435 | 824 | &exit_time, |
duke@435 | 825 | &kernel_time, |
duke@435 | 826 | &user_time); |
duke@435 | 827 | if (result != 0) { |
duke@435 | 828 | FILETIME wt; |
duke@435 | 829 | GetSystemTimeAsFileTime(&wt); |
duke@435 | 830 | jlong rtc_millis = windows_to_java_time(wt); |
duke@435 | 831 | jlong user_millis = windows_to_java_time(user_time); |
duke@435 | 832 | jlong system_millis = windows_to_java_time(kernel_time); |
duke@435 | 833 | *process_real_time = ((double) rtc_millis) / ((double) MILLIUNITS); |
duke@435 | 834 | *process_user_time = ((double) user_millis) / ((double) MILLIUNITS); |
duke@435 | 835 | *process_system_time = ((double) system_millis) / ((double) MILLIUNITS); |
duke@435 | 836 | return true; |
duke@435 | 837 | } else { |
duke@435 | 838 | return false; |
duke@435 | 839 | } |
duke@435 | 840 | } |
duke@435 | 841 | |
duke@435 | 842 | void os::shutdown() { |
duke@435 | 843 | |
duke@435 | 844 | // allow PerfMemory to attempt cleanup of any persistent resources |
duke@435 | 845 | perfMemory_exit(); |
duke@435 | 846 | |
duke@435 | 847 | // flush buffered output, finish log files |
duke@435 | 848 | ostream_abort(); |
duke@435 | 849 | |
duke@435 | 850 | // Check for abort hook |
duke@435 | 851 | abort_hook_t abort_hook = Arguments::abort_hook(); |
duke@435 | 852 | if (abort_hook != NULL) { |
duke@435 | 853 | abort_hook(); |
duke@435 | 854 | } |
duke@435 | 855 | } |
duke@435 | 856 | |
duke@435 | 857 | void os::abort(bool dump_core) |
duke@435 | 858 | { |
duke@435 | 859 | os::shutdown(); |
duke@435 | 860 | // no core dump on Windows |
duke@435 | 861 | ::exit(1); |
duke@435 | 862 | } |
duke@435 | 863 | |
duke@435 | 864 | // Die immediately, no exit hook, no abort hook, no cleanup. |
duke@435 | 865 | void os::die() { |
duke@435 | 866 | _exit(-1); |
duke@435 | 867 | } |
duke@435 | 868 | |
duke@435 | 869 | // Directory routines copied from src/win32/native/java/io/dirent_md.c |
duke@435 | 870 | // * dirent_md.c 1.15 00/02/02 |
duke@435 | 871 | // |
duke@435 | 872 | // The declarations for DIR and struct dirent are in jvm_win32.h. |
duke@435 | 873 | |
duke@435 | 874 | /* Caller must have already run dirname through JVM_NativePath, which removes |
duke@435 | 875 | duplicate slashes and converts all instances of '/' into '\\'. */ |
duke@435 | 876 | |
duke@435 | 877 | DIR * |
duke@435 | 878 | os::opendir(const char *dirname) |
duke@435 | 879 | { |
duke@435 | 880 | assert(dirname != NULL, "just checking"); // hotspot change |
duke@435 | 881 | DIR *dirp = (DIR *)malloc(sizeof(DIR)); |
duke@435 | 882 | DWORD fattr; // hotspot change |
duke@435 | 883 | char alt_dirname[4] = { 0, 0, 0, 0 }; |
duke@435 | 884 | |
duke@435 | 885 | if (dirp == 0) { |
duke@435 | 886 | errno = ENOMEM; |
duke@435 | 887 | return 0; |
duke@435 | 888 | } |
duke@435 | 889 | |
duke@435 | 890 | /* |
duke@435 | 891 | * Win32 accepts "\" in its POSIX stat(), but refuses to treat it |
duke@435 | 892 | * as a directory in FindFirstFile(). We detect this case here and |
duke@435 | 893 | * prepend the current drive name. |
duke@435 | 894 | */ |
duke@435 | 895 | if (dirname[1] == '\0' && dirname[0] == '\\') { |
duke@435 | 896 | alt_dirname[0] = _getdrive() + 'A' - 1; |
duke@435 | 897 | alt_dirname[1] = ':'; |
duke@435 | 898 | alt_dirname[2] = '\\'; |
duke@435 | 899 | alt_dirname[3] = '\0'; |
duke@435 | 900 | dirname = alt_dirname; |
duke@435 | 901 | } |
duke@435 | 902 | |
duke@435 | 903 | dirp->path = (char *)malloc(strlen(dirname) + 5); |
duke@435 | 904 | if (dirp->path == 0) { |
duke@435 | 905 | free(dirp); |
duke@435 | 906 | errno = ENOMEM; |
duke@435 | 907 | return 0; |
duke@435 | 908 | } |
duke@435 | 909 | strcpy(dirp->path, dirname); |
duke@435 | 910 | |
duke@435 | 911 | fattr = GetFileAttributes(dirp->path); |
duke@435 | 912 | if (fattr == 0xffffffff) { |
duke@435 | 913 | free(dirp->path); |
duke@435 | 914 | free(dirp); |
duke@435 | 915 | errno = ENOENT; |
duke@435 | 916 | return 0; |
duke@435 | 917 | } else if ((fattr & FILE_ATTRIBUTE_DIRECTORY) == 0) { |
duke@435 | 918 | free(dirp->path); |
duke@435 | 919 | free(dirp); |
duke@435 | 920 | errno = ENOTDIR; |
duke@435 | 921 | return 0; |
duke@435 | 922 | } |
duke@435 | 923 | |
duke@435 | 924 | /* Append "*.*", or possibly "\\*.*", to path */ |
duke@435 | 925 | if (dirp->path[1] == ':' |
duke@435 | 926 | && (dirp->path[2] == '\0' |
duke@435 | 927 | || (dirp->path[2] == '\\' && dirp->path[3] == '\0'))) { |
duke@435 | 928 | /* No '\\' needed for cases like "Z:" or "Z:\" */ |
duke@435 | 929 | strcat(dirp->path, "*.*"); |
duke@435 | 930 | } else { |
duke@435 | 931 | strcat(dirp->path, "\\*.*"); |
duke@435 | 932 | } |
duke@435 | 933 | |
duke@435 | 934 | dirp->handle = FindFirstFile(dirp->path, &dirp->find_data); |
duke@435 | 935 | if (dirp->handle == INVALID_HANDLE_VALUE) { |
duke@435 | 936 | if (GetLastError() != ERROR_FILE_NOT_FOUND) { |
duke@435 | 937 | free(dirp->path); |
duke@435 | 938 | free(dirp); |
duke@435 | 939 | errno = EACCES; |
duke@435 | 940 | return 0; |
duke@435 | 941 | } |
duke@435 | 942 | } |
duke@435 | 943 | return dirp; |
duke@435 | 944 | } |
duke@435 | 945 | |
duke@435 | 946 | /* parameter dbuf unused on Windows */ |
duke@435 | 947 | |
duke@435 | 948 | struct dirent * |
duke@435 | 949 | os::readdir(DIR *dirp, dirent *dbuf) |
duke@435 | 950 | { |
duke@435 | 951 | assert(dirp != NULL, "just checking"); // hotspot change |
duke@435 | 952 | if (dirp->handle == INVALID_HANDLE_VALUE) { |
duke@435 | 953 | return 0; |
duke@435 | 954 | } |
duke@435 | 955 | |
duke@435 | 956 | strcpy(dirp->dirent.d_name, dirp->find_data.cFileName); |
duke@435 | 957 | |
duke@435 | 958 | if (!FindNextFile(dirp->handle, &dirp->find_data)) { |
duke@435 | 959 | if (GetLastError() == ERROR_INVALID_HANDLE) { |
duke@435 | 960 | errno = EBADF; |
duke@435 | 961 | return 0; |
duke@435 | 962 | } |
duke@435 | 963 | FindClose(dirp->handle); |
duke@435 | 964 | dirp->handle = INVALID_HANDLE_VALUE; |
duke@435 | 965 | } |
duke@435 | 966 | |
duke@435 | 967 | return &dirp->dirent; |
duke@435 | 968 | } |
duke@435 | 969 | |
duke@435 | 970 | int |
duke@435 | 971 | os::closedir(DIR *dirp) |
duke@435 | 972 | { |
duke@435 | 973 | assert(dirp != NULL, "just checking"); // hotspot change |
duke@435 | 974 | if (dirp->handle != INVALID_HANDLE_VALUE) { |
duke@435 | 975 | if (!FindClose(dirp->handle)) { |
duke@435 | 976 | errno = EBADF; |
duke@435 | 977 | return -1; |
duke@435 | 978 | } |
duke@435 | 979 | dirp->handle = INVALID_HANDLE_VALUE; |
duke@435 | 980 | } |
duke@435 | 981 | free(dirp->path); |
duke@435 | 982 | free(dirp); |
duke@435 | 983 | return 0; |
duke@435 | 984 | } |
duke@435 | 985 | |
duke@435 | 986 | const char* os::dll_file_extension() { return ".dll"; } |
duke@435 | 987 | |
duke@435 | 988 | const char * os::get_temp_directory() |
duke@435 | 989 | { |
duke@435 | 990 | static char path_buf[MAX_PATH]; |
duke@435 | 991 | if (GetTempPath(MAX_PATH, path_buf)>0) |
duke@435 | 992 | return path_buf; |
duke@435 | 993 | else{ |
duke@435 | 994 | path_buf[0]='\0'; |
duke@435 | 995 | return path_buf; |
duke@435 | 996 | } |
duke@435 | 997 | } |
duke@435 | 998 | |
kamg@677 | 999 | void os::dll_build_name(char *holder, size_t holderlen, |
kamg@677 | 1000 | const char* pname, const char* fname) |
kamg@677 | 1001 | { |
kamg@677 | 1002 | // copied from libhpi |
kamg@677 | 1003 | const size_t pnamelen = pname ? strlen(pname) : 0; |
kamg@677 | 1004 | const char c = (pnamelen > 0) ? pname[pnamelen-1] : 0; |
kamg@677 | 1005 | |
kamg@677 | 1006 | /* Quietly truncates on buffer overflow. Should be an error. */ |
kamg@677 | 1007 | if (pnamelen + strlen(fname) + 10 > holderlen) { |
kamg@677 | 1008 | *holder = '\0'; |
kamg@677 | 1009 | return; |
kamg@677 | 1010 | } |
kamg@677 | 1011 | |
kamg@677 | 1012 | if (pnamelen == 0) { |
kamg@677 | 1013 | sprintf(holder, "%s.dll", fname); |
kamg@677 | 1014 | } else if (c == ':' || c == '\\') { |
kamg@677 | 1015 | sprintf(holder, "%s%s.dll", pname, fname); |
kamg@677 | 1016 | } else { |
kamg@677 | 1017 | sprintf(holder, "%s\\%s.dll", pname, fname); |
kamg@677 | 1018 | } |
kamg@677 | 1019 | } |
kamg@677 | 1020 | |
duke@435 | 1021 | // Needs to be in os specific directory because windows requires another |
duke@435 | 1022 | // header file <direct.h> |
duke@435 | 1023 | const char* os::get_current_directory(char *buf, int buflen) { |
duke@435 | 1024 | return _getcwd(buf, buflen); |
duke@435 | 1025 | } |
duke@435 | 1026 | |
duke@435 | 1027 | //----------------------------------------------------------- |
duke@435 | 1028 | // Helper functions for fatal error handler |
duke@435 | 1029 | |
duke@435 | 1030 | // The following library functions are resolved dynamically at runtime: |
duke@435 | 1031 | |
duke@435 | 1032 | // PSAPI functions, for Windows NT, 2000, XP |
duke@435 | 1033 | |
duke@435 | 1034 | // psapi.h doesn't come with Visual Studio 6; it can be downloaded as Platform |
duke@435 | 1035 | // SDK from Microsoft. Here are the definitions copied from psapi.h |
duke@435 | 1036 | typedef struct _MODULEINFO { |
duke@435 | 1037 | LPVOID lpBaseOfDll; |
duke@435 | 1038 | DWORD SizeOfImage; |
duke@435 | 1039 | LPVOID EntryPoint; |
duke@435 | 1040 | } MODULEINFO, *LPMODULEINFO; |
duke@435 | 1041 | |
duke@435 | 1042 | static BOOL (WINAPI *_EnumProcessModules) ( HANDLE, HMODULE *, DWORD, LPDWORD ); |
duke@435 | 1043 | static DWORD (WINAPI *_GetModuleFileNameEx) ( HANDLE, HMODULE, LPTSTR, DWORD ); |
duke@435 | 1044 | static BOOL (WINAPI *_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD ); |
duke@435 | 1045 | |
duke@435 | 1046 | // ToolHelp Functions, for Windows 95, 98 and ME |
duke@435 | 1047 | |
duke@435 | 1048 | static HANDLE(WINAPI *_CreateToolhelp32Snapshot)(DWORD,DWORD) ; |
duke@435 | 1049 | static BOOL (WINAPI *_Module32First) (HANDLE,LPMODULEENTRY32) ; |
duke@435 | 1050 | static BOOL (WINAPI *_Module32Next) (HANDLE,LPMODULEENTRY32) ; |
duke@435 | 1051 | |
duke@435 | 1052 | bool _has_psapi; |
duke@435 | 1053 | bool _psapi_init = false; |
duke@435 | 1054 | bool _has_toolhelp; |
duke@435 | 1055 | |
duke@435 | 1056 | static bool _init_psapi() { |
duke@435 | 1057 | HINSTANCE psapi = LoadLibrary( "PSAPI.DLL" ) ; |
duke@435 | 1058 | if( psapi == NULL ) return false ; |
duke@435 | 1059 | |
duke@435 | 1060 | _EnumProcessModules = CAST_TO_FN_PTR( |
duke@435 | 1061 | BOOL(WINAPI *)(HANDLE, HMODULE *, DWORD, LPDWORD), |
duke@435 | 1062 | GetProcAddress(psapi, "EnumProcessModules")) ; |
duke@435 | 1063 | _GetModuleFileNameEx = CAST_TO_FN_PTR( |
duke@435 | 1064 | DWORD (WINAPI *)(HANDLE, HMODULE, LPTSTR, DWORD), |
duke@435 | 1065 | GetProcAddress(psapi, "GetModuleFileNameExA")); |
duke@435 | 1066 | _GetModuleInformation = CAST_TO_FN_PTR( |
duke@435 | 1067 | BOOL (WINAPI *)(HANDLE, HMODULE, LPMODULEINFO, DWORD), |
duke@435 | 1068 | GetProcAddress(psapi, "GetModuleInformation")); |
duke@435 | 1069 | |
duke@435 | 1070 | _has_psapi = (_EnumProcessModules && _GetModuleFileNameEx && _GetModuleInformation); |
duke@435 | 1071 | _psapi_init = true; |
duke@435 | 1072 | return _has_psapi; |
duke@435 | 1073 | } |
duke@435 | 1074 | |
duke@435 | 1075 | static bool _init_toolhelp() { |
duke@435 | 1076 | HINSTANCE kernel32 = LoadLibrary("Kernel32.DLL") ; |
duke@435 | 1077 | if (kernel32 == NULL) return false ; |
duke@435 | 1078 | |
duke@435 | 1079 | _CreateToolhelp32Snapshot = CAST_TO_FN_PTR( |
duke@435 | 1080 | HANDLE(WINAPI *)(DWORD,DWORD), |
duke@435 | 1081 | GetProcAddress(kernel32, "CreateToolhelp32Snapshot")); |
duke@435 | 1082 | _Module32First = CAST_TO_FN_PTR( |
duke@435 | 1083 | BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), |
duke@435 | 1084 | GetProcAddress(kernel32, "Module32First" )); |
duke@435 | 1085 | _Module32Next = CAST_TO_FN_PTR( |
duke@435 | 1086 | BOOL(WINAPI *)(HANDLE,LPMODULEENTRY32), |
duke@435 | 1087 | GetProcAddress(kernel32, "Module32Next" )); |
duke@435 | 1088 | |
duke@435 | 1089 | _has_toolhelp = (_CreateToolhelp32Snapshot && _Module32First && _Module32Next); |
duke@435 | 1090 | return _has_toolhelp; |
duke@435 | 1091 | } |
duke@435 | 1092 | |
duke@435 | 1093 | #ifdef _WIN64 |
duke@435 | 1094 | // Helper routine which returns true if address in |
duke@435 | 1095 | // within the NTDLL address space. |
duke@435 | 1096 | // |
duke@435 | 1097 | static bool _addr_in_ntdll( address addr ) |
duke@435 | 1098 | { |
duke@435 | 1099 | HMODULE hmod; |
duke@435 | 1100 | MODULEINFO minfo; |
duke@435 | 1101 | |
duke@435 | 1102 | hmod = GetModuleHandle("NTDLL.DLL"); |
duke@435 | 1103 | if ( hmod == NULL ) return false; |
duke@435 | 1104 | if ( !_GetModuleInformation( GetCurrentProcess(), hmod, |
duke@435 | 1105 | &minfo, sizeof(MODULEINFO)) ) |
duke@435 | 1106 | return false; |
duke@435 | 1107 | |
duke@435 | 1108 | if ( (addr >= minfo.lpBaseOfDll) && |
duke@435 | 1109 | (addr < (address)((uintptr_t)minfo.lpBaseOfDll + (uintptr_t)minfo.SizeOfImage))) |
duke@435 | 1110 | return true; |
duke@435 | 1111 | else |
duke@435 | 1112 | return false; |
duke@435 | 1113 | } |
duke@435 | 1114 | #endif |
duke@435 | 1115 | |
duke@435 | 1116 | |
duke@435 | 1117 | // Enumerate all modules for a given process ID |
duke@435 | 1118 | // |
duke@435 | 1119 | // Notice that Windows 95/98/Me and Windows NT/2000/XP have |
duke@435 | 1120 | // different API for doing this. We use PSAPI.DLL on NT based |
duke@435 | 1121 | // Windows and ToolHelp on 95/98/Me. |
duke@435 | 1122 | |
duke@435 | 1123 | // Callback function that is called by enumerate_modules() on |
duke@435 | 1124 | // every DLL module. |
duke@435 | 1125 | // Input parameters: |
duke@435 | 1126 | // int pid, |
duke@435 | 1127 | // char* module_file_name, |
duke@435 | 1128 | // address module_base_addr, |
duke@435 | 1129 | // unsigned module_size, |
duke@435 | 1130 | // void* param |
duke@435 | 1131 | typedef int (*EnumModulesCallbackFunc)(int, char *, address, unsigned, void *); |
duke@435 | 1132 | |
duke@435 | 1133 | // enumerate_modules for Windows NT, using PSAPI |
duke@435 | 1134 | static int _enumerate_modules_winnt( int pid, EnumModulesCallbackFunc func, void * param) |
duke@435 | 1135 | { |
duke@435 | 1136 | HANDLE hProcess ; |
duke@435 | 1137 | |
duke@435 | 1138 | # define MAX_NUM_MODULES 128 |
duke@435 | 1139 | HMODULE modules[MAX_NUM_MODULES]; |
duke@435 | 1140 | static char filename[ MAX_PATH ]; |
duke@435 | 1141 | int result = 0; |
duke@435 | 1142 | |
duke@435 | 1143 | if (!_has_psapi && (_psapi_init || !_init_psapi())) return 0; |
duke@435 | 1144 | |
duke@435 | 1145 | hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, |
duke@435 | 1146 | FALSE, pid ) ; |
duke@435 | 1147 | if (hProcess == NULL) return 0; |
duke@435 | 1148 | |
duke@435 | 1149 | DWORD size_needed; |
duke@435 | 1150 | if (!_EnumProcessModules(hProcess, modules, |
duke@435 | 1151 | sizeof(modules), &size_needed)) { |
duke@435 | 1152 | CloseHandle( hProcess ); |
duke@435 | 1153 | return 0; |
duke@435 | 1154 | } |
duke@435 | 1155 | |
duke@435 | 1156 | // number of modules that are currently loaded |
duke@435 | 1157 | int num_modules = size_needed / sizeof(HMODULE); |
duke@435 | 1158 | |
duke@435 | 1159 | for (int i = 0; i < MIN2(num_modules, MAX_NUM_MODULES); i++) { |
duke@435 | 1160 | // Get Full pathname: |
duke@435 | 1161 | if(!_GetModuleFileNameEx(hProcess, modules[i], |
duke@435 | 1162 | filename, sizeof(filename))) { |
duke@435 | 1163 | filename[0] = '\0'; |
duke@435 | 1164 | } |
duke@435 | 1165 | |
duke@435 | 1166 | MODULEINFO modinfo; |
duke@435 | 1167 | if (!_GetModuleInformation(hProcess, modules[i], |
duke@435 | 1168 | &modinfo, sizeof(modinfo))) { |
duke@435 | 1169 | modinfo.lpBaseOfDll = NULL; |
duke@435 | 1170 | modinfo.SizeOfImage = 0; |
duke@435 | 1171 | } |
duke@435 | 1172 | |
duke@435 | 1173 | // Invoke callback function |
duke@435 | 1174 | result = func(pid, filename, (address)modinfo.lpBaseOfDll, |
duke@435 | 1175 | modinfo.SizeOfImage, param); |
duke@435 | 1176 | if (result) break; |
duke@435 | 1177 | } |
duke@435 | 1178 | |
duke@435 | 1179 | CloseHandle( hProcess ) ; |
duke@435 | 1180 | return result; |
duke@435 | 1181 | } |
duke@435 | 1182 | |
duke@435 | 1183 | |
duke@435 | 1184 | // enumerate_modules for Windows 95/98/ME, using TOOLHELP |
duke@435 | 1185 | static int _enumerate_modules_windows( int pid, EnumModulesCallbackFunc func, void *param) |
duke@435 | 1186 | { |
duke@435 | 1187 | HANDLE hSnapShot ; |
duke@435 | 1188 | static MODULEENTRY32 modentry ; |
duke@435 | 1189 | int result = 0; |
duke@435 | 1190 | |
duke@435 | 1191 | if (!_has_toolhelp) return 0; |
duke@435 | 1192 | |
duke@435 | 1193 | // Get a handle to a Toolhelp snapshot of the system |
duke@435 | 1194 | hSnapShot = _CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, pid ) ; |
duke@435 | 1195 | if( hSnapShot == INVALID_HANDLE_VALUE ) { |
duke@435 | 1196 | return FALSE ; |
duke@435 | 1197 | } |
duke@435 | 1198 | |
duke@435 | 1199 | // iterate through all modules |
duke@435 | 1200 | modentry.dwSize = sizeof(MODULEENTRY32) ; |
duke@435 | 1201 | bool not_done = _Module32First( hSnapShot, &modentry ) != 0; |
duke@435 | 1202 | |
duke@435 | 1203 | while( not_done ) { |
duke@435 | 1204 | // invoke the callback |
duke@435 | 1205 | result=func(pid, modentry.szExePath, (address)modentry.modBaseAddr, |
duke@435 | 1206 | modentry.modBaseSize, param); |
duke@435 | 1207 | if (result) break; |
duke@435 | 1208 | |
duke@435 | 1209 | modentry.dwSize = sizeof(MODULEENTRY32) ; |
duke@435 | 1210 | not_done = _Module32Next( hSnapShot, &modentry ) != 0; |
duke@435 | 1211 | } |
duke@435 | 1212 | |
duke@435 | 1213 | CloseHandle(hSnapShot); |
duke@435 | 1214 | return result; |
duke@435 | 1215 | } |
duke@435 | 1216 | |
duke@435 | 1217 | int enumerate_modules( int pid, EnumModulesCallbackFunc func, void * param ) |
duke@435 | 1218 | { |
duke@435 | 1219 | // Get current process ID if caller doesn't provide it. |
duke@435 | 1220 | if (!pid) pid = os::current_process_id(); |
duke@435 | 1221 | |
duke@435 | 1222 | if (os::win32::is_nt()) return _enumerate_modules_winnt (pid, func, param); |
duke@435 | 1223 | else return _enumerate_modules_windows(pid, func, param); |
duke@435 | 1224 | } |
duke@435 | 1225 | |
duke@435 | 1226 | struct _modinfo { |
duke@435 | 1227 | address addr; |
duke@435 | 1228 | char* full_path; // point to a char buffer |
duke@435 | 1229 | int buflen; // size of the buffer |
duke@435 | 1230 | address base_addr; |
duke@435 | 1231 | }; |
duke@435 | 1232 | |
duke@435 | 1233 | static int _locate_module_by_addr(int pid, char * mod_fname, address base_addr, |
duke@435 | 1234 | unsigned size, void * param) { |
duke@435 | 1235 | struct _modinfo *pmod = (struct _modinfo *)param; |
duke@435 | 1236 | if (!pmod) return -1; |
duke@435 | 1237 | |
duke@435 | 1238 | if (base_addr <= pmod->addr && |
duke@435 | 1239 | base_addr+size > pmod->addr) { |
duke@435 | 1240 | // if a buffer is provided, copy path name to the buffer |
duke@435 | 1241 | if (pmod->full_path) { |
duke@435 | 1242 | jio_snprintf(pmod->full_path, pmod->buflen, "%s", mod_fname); |
duke@435 | 1243 | } |
duke@435 | 1244 | pmod->base_addr = base_addr; |
duke@435 | 1245 | return 1; |
duke@435 | 1246 | } |
duke@435 | 1247 | return 0; |
duke@435 | 1248 | } |
duke@435 | 1249 | |
duke@435 | 1250 | bool os::dll_address_to_library_name(address addr, char* buf, |
duke@435 | 1251 | int buflen, int* offset) { |
duke@435 | 1252 | // NOTE: the reason we don't use SymGetModuleInfo() is it doesn't always |
duke@435 | 1253 | // return the full path to the DLL file, sometimes it returns path |
duke@435 | 1254 | // to the corresponding PDB file (debug info); sometimes it only |
duke@435 | 1255 | // returns partial path, which makes life painful. |
duke@435 | 1256 | |
duke@435 | 1257 | struct _modinfo mi; |
duke@435 | 1258 | mi.addr = addr; |
duke@435 | 1259 | mi.full_path = buf; |
duke@435 | 1260 | mi.buflen = buflen; |
duke@435 | 1261 | int pid = os::current_process_id(); |
duke@435 | 1262 | if (enumerate_modules(pid, _locate_module_by_addr, (void *)&mi)) { |
duke@435 | 1263 | // buf already contains path name |
duke@435 | 1264 | if (offset) *offset = addr - mi.base_addr; |
duke@435 | 1265 | return true; |
duke@435 | 1266 | } else { |
duke@435 | 1267 | if (buf) buf[0] = '\0'; |
duke@435 | 1268 | if (offset) *offset = -1; |
duke@435 | 1269 | return false; |
duke@435 | 1270 | } |
duke@435 | 1271 | } |
duke@435 | 1272 | |
duke@435 | 1273 | bool os::dll_address_to_function_name(address addr, char *buf, |
duke@435 | 1274 | int buflen, int *offset) { |
duke@435 | 1275 | // Unimplemented on Windows - in order to use SymGetSymFromAddr(), |
duke@435 | 1276 | // we need to initialize imagehlp/dbghelp, then load symbol table |
duke@435 | 1277 | // for every module. That's too much work to do after a fatal error. |
duke@435 | 1278 | // For an example on how to implement this function, see 1.4.2. |
duke@435 | 1279 | if (offset) *offset = -1; |
duke@435 | 1280 | if (buf) buf[0] = '\0'; |
duke@435 | 1281 | return false; |
duke@435 | 1282 | } |
duke@435 | 1283 | |
kamg@677 | 1284 | void* os::dll_lookup(void* handle, const char* name) { |
kamg@677 | 1285 | return GetProcAddress((HMODULE)handle, name); |
kamg@677 | 1286 | } |
kamg@677 | 1287 | |
duke@435 | 1288 | // save the start and end address of jvm.dll into param[0] and param[1] |
duke@435 | 1289 | static int _locate_jvm_dll(int pid, char* mod_fname, address base_addr, |
duke@435 | 1290 | unsigned size, void * param) { |
duke@435 | 1291 | if (!param) return -1; |
duke@435 | 1292 | |
duke@435 | 1293 | if (base_addr <= (address)_locate_jvm_dll && |
duke@435 | 1294 | base_addr+size > (address)_locate_jvm_dll) { |
duke@435 | 1295 | ((address*)param)[0] = base_addr; |
duke@435 | 1296 | ((address*)param)[1] = base_addr + size; |
duke@435 | 1297 | return 1; |
duke@435 | 1298 | } |
duke@435 | 1299 | return 0; |
duke@435 | 1300 | } |
duke@435 | 1301 | |
duke@435 | 1302 | address vm_lib_location[2]; // start and end address of jvm.dll |
duke@435 | 1303 | |
duke@435 | 1304 | // check if addr is inside jvm.dll |
duke@435 | 1305 | bool os::address_is_in_vm(address addr) { |
duke@435 | 1306 | if (!vm_lib_location[0] || !vm_lib_location[1]) { |
duke@435 | 1307 | int pid = os::current_process_id(); |
duke@435 | 1308 | if (!enumerate_modules(pid, _locate_jvm_dll, (void *)vm_lib_location)) { |
duke@435 | 1309 | assert(false, "Can't find jvm module."); |
duke@435 | 1310 | return false; |
duke@435 | 1311 | } |
duke@435 | 1312 | } |
duke@435 | 1313 | |
duke@435 | 1314 | return (vm_lib_location[0] <= addr) && (addr < vm_lib_location[1]); |
duke@435 | 1315 | } |
duke@435 | 1316 | |
duke@435 | 1317 | // print module info; param is outputStream* |
duke@435 | 1318 | static int _print_module(int pid, char* fname, address base, |
duke@435 | 1319 | unsigned size, void* param) { |
duke@435 | 1320 | if (!param) return -1; |
duke@435 | 1321 | |
duke@435 | 1322 | outputStream* st = (outputStream*)param; |
duke@435 | 1323 | |
duke@435 | 1324 | address end_addr = base + size; |
duke@435 | 1325 | st->print(PTR_FORMAT " - " PTR_FORMAT " \t%s\n", base, end_addr, fname); |
duke@435 | 1326 | return 0; |
duke@435 | 1327 | } |
duke@435 | 1328 | |
duke@435 | 1329 | // Loads .dll/.so and |
duke@435 | 1330 | // in case of error it checks if .dll/.so was built for the |
duke@435 | 1331 | // same architecture as Hotspot is running on |
duke@435 | 1332 | void * os::dll_load(const char *name, char *ebuf, int ebuflen) |
duke@435 | 1333 | { |
duke@435 | 1334 | void * result = LoadLibrary(name); |
duke@435 | 1335 | if (result != NULL) |
duke@435 | 1336 | { |
duke@435 | 1337 | return result; |
duke@435 | 1338 | } |
duke@435 | 1339 | |
duke@435 | 1340 | long errcode = GetLastError(); |
duke@435 | 1341 | if (errcode == ERROR_MOD_NOT_FOUND) { |
duke@435 | 1342 | strncpy(ebuf, "Can't find dependent libraries", ebuflen-1); |
duke@435 | 1343 | ebuf[ebuflen-1]='\0'; |
duke@435 | 1344 | return NULL; |
duke@435 | 1345 | } |
duke@435 | 1346 | |
duke@435 | 1347 | // Parsing dll below |
duke@435 | 1348 | // If we can read dll-info and find that dll was built |
duke@435 | 1349 | // for an architecture other than Hotspot is running in |
duke@435 | 1350 | // - then print to buffer "DLL was built for a different architecture" |
duke@435 | 1351 | // else call getLastErrorString to obtain system error message |
duke@435 | 1352 | |
duke@435 | 1353 | // Read system error message into ebuf |
duke@435 | 1354 | // It may or may not be overwritten below (in the for loop and just above) |
duke@435 | 1355 | getLastErrorString(ebuf, (size_t) ebuflen); |
duke@435 | 1356 | ebuf[ebuflen-1]='\0'; |
duke@435 | 1357 | int file_descriptor=::open(name, O_RDONLY | O_BINARY, 0); |
duke@435 | 1358 | if (file_descriptor<0) |
duke@435 | 1359 | { |
duke@435 | 1360 | return NULL; |
duke@435 | 1361 | } |
duke@435 | 1362 | |
duke@435 | 1363 | uint32_t signature_offset; |
duke@435 | 1364 | uint16_t lib_arch=0; |
duke@435 | 1365 | bool failed_to_get_lib_arch= |
duke@435 | 1366 | ( |
duke@435 | 1367 | //Go to position 3c in the dll |
duke@435 | 1368 | (os::seek_to_file_offset(file_descriptor,IMAGE_FILE_PTR_TO_SIGNATURE)<0) |
duke@435 | 1369 | || |
duke@435 | 1370 | // Read loacation of signature |
duke@435 | 1371 | (sizeof(signature_offset)!= |
duke@435 | 1372 | (os::read(file_descriptor, (void*)&signature_offset,sizeof(signature_offset)))) |
duke@435 | 1373 | || |
duke@435 | 1374 | //Go to COFF File Header in dll |
duke@435 | 1375 | //that is located after"signature" (4 bytes long) |
duke@435 | 1376 | (os::seek_to_file_offset(file_descriptor, |
duke@435 | 1377 | signature_offset+IMAGE_FILE_SIGNATURE_LENGTH)<0) |
duke@435 | 1378 | || |
duke@435 | 1379 | //Read field that contains code of architecture |
duke@435 | 1380 | // that dll was build for |
duke@435 | 1381 | (sizeof(lib_arch)!= |
duke@435 | 1382 | (os::read(file_descriptor, (void*)&lib_arch,sizeof(lib_arch)))) |
duke@435 | 1383 | ); |
duke@435 | 1384 | |
duke@435 | 1385 | ::close(file_descriptor); |
duke@435 | 1386 | if (failed_to_get_lib_arch) |
duke@435 | 1387 | { |
duke@435 | 1388 | // file i/o error - report getLastErrorString(...) msg |
duke@435 | 1389 | return NULL; |
duke@435 | 1390 | } |
duke@435 | 1391 | |
duke@435 | 1392 | typedef struct |
duke@435 | 1393 | { |
duke@435 | 1394 | uint16_t arch_code; |
duke@435 | 1395 | char* arch_name; |
duke@435 | 1396 | } arch_t; |
duke@435 | 1397 | |
duke@435 | 1398 | static const arch_t arch_array[]={ |
duke@435 | 1399 | {IMAGE_FILE_MACHINE_I386, (char*)"IA 32"}, |
duke@435 | 1400 | {IMAGE_FILE_MACHINE_AMD64, (char*)"AMD 64"}, |
duke@435 | 1401 | {IMAGE_FILE_MACHINE_IA64, (char*)"IA 64"} |
duke@435 | 1402 | }; |
duke@435 | 1403 | #if (defined _M_IA64) |
duke@435 | 1404 | static const uint16_t running_arch=IMAGE_FILE_MACHINE_IA64; |
duke@435 | 1405 | #elif (defined _M_AMD64) |
duke@435 | 1406 | static const uint16_t running_arch=IMAGE_FILE_MACHINE_AMD64; |
duke@435 | 1407 | #elif (defined _M_IX86) |
duke@435 | 1408 | static const uint16_t running_arch=IMAGE_FILE_MACHINE_I386; |
duke@435 | 1409 | #else |
duke@435 | 1410 | #error Method os::dll_load requires that one of following \ |
duke@435 | 1411 | is defined :_M_IA64,_M_AMD64 or _M_IX86 |
duke@435 | 1412 | #endif |
duke@435 | 1413 | |
duke@435 | 1414 | |
duke@435 | 1415 | // Obtain a string for printf operation |
duke@435 | 1416 | // lib_arch_str shall contain string what platform this .dll was built for |
duke@435 | 1417 | // running_arch_str shall string contain what platform Hotspot was built for |
duke@435 | 1418 | char *running_arch_str=NULL,*lib_arch_str=NULL; |
duke@435 | 1419 | for (unsigned int i=0;i<ARRAY_SIZE(arch_array);i++) |
duke@435 | 1420 | { |
duke@435 | 1421 | if (lib_arch==arch_array[i].arch_code) |
duke@435 | 1422 | lib_arch_str=arch_array[i].arch_name; |
duke@435 | 1423 | if (running_arch==arch_array[i].arch_code) |
duke@435 | 1424 | running_arch_str=arch_array[i].arch_name; |
duke@435 | 1425 | } |
duke@435 | 1426 | |
duke@435 | 1427 | assert(running_arch_str, |
duke@435 | 1428 | "Didn't find runing architecture code in arch_array"); |
duke@435 | 1429 | |
duke@435 | 1430 | // If the architure is right |
duke@435 | 1431 | // but some other error took place - report getLastErrorString(...) msg |
duke@435 | 1432 | if (lib_arch == running_arch) |
duke@435 | 1433 | { |
duke@435 | 1434 | return NULL; |
duke@435 | 1435 | } |
duke@435 | 1436 | |
duke@435 | 1437 | if (lib_arch_str!=NULL) |
duke@435 | 1438 | { |
duke@435 | 1439 | ::_snprintf(ebuf, ebuflen-1, |
duke@435 | 1440 | "Can't load %s-bit .dll on a %s-bit platform", |
duke@435 | 1441 | lib_arch_str,running_arch_str); |
duke@435 | 1442 | } |
duke@435 | 1443 | else |
duke@435 | 1444 | { |
duke@435 | 1445 | // don't know what architecture this dll was build for |
duke@435 | 1446 | ::_snprintf(ebuf, ebuflen-1, |
duke@435 | 1447 | "Can't load this .dll (machine code=0x%x) on a %s-bit platform", |
duke@435 | 1448 | lib_arch,running_arch_str); |
duke@435 | 1449 | } |
duke@435 | 1450 | |
duke@435 | 1451 | return NULL; |
duke@435 | 1452 | } |
duke@435 | 1453 | |
duke@435 | 1454 | |
duke@435 | 1455 | void os::print_dll_info(outputStream *st) { |
duke@435 | 1456 | int pid = os::current_process_id(); |
duke@435 | 1457 | st->print_cr("Dynamic libraries:"); |
duke@435 | 1458 | enumerate_modules(pid, _print_module, (void *)st); |
duke@435 | 1459 | } |
duke@435 | 1460 | |
xlu@708 | 1461 | // function pointer to Windows API "GetNativeSystemInfo". |
xlu@708 | 1462 | typedef void (WINAPI *GetNativeSystemInfo_func_type)(LPSYSTEM_INFO); |
xlu@708 | 1463 | static GetNativeSystemInfo_func_type _GetNativeSystemInfo; |
xlu@708 | 1464 | |
duke@435 | 1465 | void os::print_os_info(outputStream* st) { |
xlu@708 | 1466 | st->print("OS:"); |
xlu@708 | 1467 | |
xlu@708 | 1468 | OSVERSIONINFOEX osvi; |
xlu@708 | 1469 | ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX)); |
xlu@708 | 1470 | osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); |
xlu@708 | 1471 | |
xlu@708 | 1472 | if (!GetVersionEx((OSVERSIONINFO *)&osvi)) { |
xlu@708 | 1473 | st->print_cr("N/A"); |
xlu@708 | 1474 | return; |
xlu@708 | 1475 | } |
xlu@708 | 1476 | |
xlu@708 | 1477 | int os_vers = osvi.dwMajorVersion * 1000 + osvi.dwMinorVersion; |
xlu@708 | 1478 | if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) { |
xlu@708 | 1479 | switch (os_vers) { |
xlu@708 | 1480 | case 3051: st->print(" Windows NT 3.51"); break; |
xlu@708 | 1481 | case 4000: st->print(" Windows NT 4.0"); break; |
xlu@708 | 1482 | case 5000: st->print(" Windows 2000"); break; |
xlu@708 | 1483 | case 5001: st->print(" Windows XP"); break; |
xlu@708 | 1484 | case 5002: |
xlu@708 | 1485 | case 6000: { |
xlu@708 | 1486 | // Retrieve SYSTEM_INFO from GetNativeSystemInfo call so that we could |
xlu@708 | 1487 | // find out whether we are running on 64 bit processor or not. |
xlu@708 | 1488 | SYSTEM_INFO si; |
xlu@708 | 1489 | ZeroMemory(&si, sizeof(SYSTEM_INFO)); |
xlu@708 | 1490 | // Check to see if _GetNativeSystemInfo has been initialized. |
xlu@708 | 1491 | if (_GetNativeSystemInfo == NULL) { |
xlu@708 | 1492 | HMODULE hKernel32 = GetModuleHandle(TEXT("kernel32.dll")); |
xlu@708 | 1493 | _GetNativeSystemInfo = |
xlu@708 | 1494 | CAST_TO_FN_PTR(GetNativeSystemInfo_func_type, |
xlu@708 | 1495 | GetProcAddress(hKernel32, |
xlu@708 | 1496 | "GetNativeSystemInfo")); |
xlu@708 | 1497 | if (_GetNativeSystemInfo == NULL) |
xlu@708 | 1498 | GetSystemInfo(&si); |
xlu@708 | 1499 | } else { |
xlu@708 | 1500 | _GetNativeSystemInfo(&si); |
xlu@708 | 1501 | } |
xlu@708 | 1502 | if (os_vers == 5002) { |
xlu@708 | 1503 | if (osvi.wProductType == VER_NT_WORKSTATION && |
xlu@708 | 1504 | si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) |
xlu@708 | 1505 | st->print(" Windows XP x64 Edition"); |
xlu@708 | 1506 | else |
xlu@708 | 1507 | st->print(" Windows Server 2003 family"); |
xlu@708 | 1508 | } else { // os_vers == 6000 |
xlu@708 | 1509 | if (osvi.wProductType == VER_NT_WORKSTATION) |
xlu@708 | 1510 | st->print(" Windows Vista"); |
xlu@708 | 1511 | else |
xlu@708 | 1512 | st->print(" Windows Server 2008"); |
xlu@708 | 1513 | if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64) |
xlu@708 | 1514 | st->print(" , 64 bit"); |
xlu@708 | 1515 | } |
xlu@708 | 1516 | break; |
xlu@708 | 1517 | } |
xlu@708 | 1518 | default: // future windows, print out its major and minor versions |
xlu@708 | 1519 | st->print(" Windows NT %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); |
xlu@708 | 1520 | } |
xlu@708 | 1521 | } else { |
xlu@708 | 1522 | switch (os_vers) { |
xlu@708 | 1523 | case 4000: st->print(" Windows 95"); break; |
xlu@708 | 1524 | case 4010: st->print(" Windows 98"); break; |
xlu@708 | 1525 | case 4090: st->print(" Windows Me"); break; |
xlu@708 | 1526 | default: // future windows, print out its major and minor versions |
xlu@708 | 1527 | st->print(" Windows %d.%d", osvi.dwMajorVersion, osvi.dwMinorVersion); |
xlu@708 | 1528 | } |
xlu@708 | 1529 | } |
xlu@708 | 1530 | st->print(" Build %d", osvi.dwBuildNumber); |
xlu@708 | 1531 | st->print(" %s", osvi.szCSDVersion); // service pack |
xlu@708 | 1532 | st->cr(); |
duke@435 | 1533 | } |
duke@435 | 1534 | |
duke@435 | 1535 | void os::print_memory_info(outputStream* st) { |
duke@435 | 1536 | st->print("Memory:"); |
duke@435 | 1537 | st->print(" %dk page", os::vm_page_size()>>10); |
duke@435 | 1538 | |
duke@435 | 1539 | // FIXME: GlobalMemoryStatus() may return incorrect value if total memory |
duke@435 | 1540 | // is larger than 4GB |
duke@435 | 1541 | MEMORYSTATUS ms; |
duke@435 | 1542 | GlobalMemoryStatus(&ms); |
duke@435 | 1543 | |
duke@435 | 1544 | st->print(", physical %uk", os::physical_memory() >> 10); |
duke@435 | 1545 | st->print("(%uk free)", os::available_memory() >> 10); |
duke@435 | 1546 | |
duke@435 | 1547 | st->print(", swap %uk", ms.dwTotalPageFile >> 10); |
duke@435 | 1548 | st->print("(%uk free)", ms.dwAvailPageFile >> 10); |
duke@435 | 1549 | st->cr(); |
duke@435 | 1550 | } |
duke@435 | 1551 | |
duke@435 | 1552 | void os::print_siginfo(outputStream *st, void *siginfo) { |
duke@435 | 1553 | EXCEPTION_RECORD* er = (EXCEPTION_RECORD*)siginfo; |
duke@435 | 1554 | st->print("siginfo:"); |
duke@435 | 1555 | st->print(" ExceptionCode=0x%x", er->ExceptionCode); |
duke@435 | 1556 | |
duke@435 | 1557 | if (er->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && |
duke@435 | 1558 | er->NumberParameters >= 2) { |
duke@435 | 1559 | switch (er->ExceptionInformation[0]) { |
duke@435 | 1560 | case 0: st->print(", reading address"); break; |
duke@435 | 1561 | case 1: st->print(", writing address"); break; |
duke@435 | 1562 | default: st->print(", ExceptionInformation=" INTPTR_FORMAT, |
duke@435 | 1563 | er->ExceptionInformation[0]); |
duke@435 | 1564 | } |
duke@435 | 1565 | st->print(" " INTPTR_FORMAT, er->ExceptionInformation[1]); |
duke@435 | 1566 | } else if (er->ExceptionCode == EXCEPTION_IN_PAGE_ERROR && |
duke@435 | 1567 | er->NumberParameters >= 2 && UseSharedSpaces) { |
duke@435 | 1568 | FileMapInfo* mapinfo = FileMapInfo::current_info(); |
duke@435 | 1569 | if (mapinfo->is_in_shared_space((void*)er->ExceptionInformation[1])) { |
duke@435 | 1570 | st->print("\n\nError accessing class data sharing archive." \ |
duke@435 | 1571 | " Mapped file inaccessible during execution, " \ |
duke@435 | 1572 | " possible disk/network problem."); |
duke@435 | 1573 | } |
duke@435 | 1574 | } else { |
duke@435 | 1575 | int num = er->NumberParameters; |
duke@435 | 1576 | if (num > 0) { |
duke@435 | 1577 | st->print(", ExceptionInformation="); |
duke@435 | 1578 | for (int i = 0; i < num; i++) { |
duke@435 | 1579 | st->print(INTPTR_FORMAT " ", er->ExceptionInformation[i]); |
duke@435 | 1580 | } |
duke@435 | 1581 | } |
duke@435 | 1582 | } |
duke@435 | 1583 | st->cr(); |
duke@435 | 1584 | } |
duke@435 | 1585 | |
duke@435 | 1586 | void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { |
duke@435 | 1587 | // do nothing |
duke@435 | 1588 | } |
duke@435 | 1589 | |
duke@435 | 1590 | static char saved_jvm_path[MAX_PATH] = {0}; |
duke@435 | 1591 | |
duke@435 | 1592 | // Find the full path to the current module, jvm.dll or jvm_g.dll |
duke@435 | 1593 | void os::jvm_path(char *buf, jint buflen) { |
duke@435 | 1594 | // Error checking. |
duke@435 | 1595 | if (buflen < MAX_PATH) { |
duke@435 | 1596 | assert(false, "must use a large-enough buffer"); |
duke@435 | 1597 | buf[0] = '\0'; |
duke@435 | 1598 | return; |
duke@435 | 1599 | } |
duke@435 | 1600 | // Lazy resolve the path to current module. |
duke@435 | 1601 | if (saved_jvm_path[0] != 0) { |
duke@435 | 1602 | strcpy(buf, saved_jvm_path); |
duke@435 | 1603 | return; |
duke@435 | 1604 | } |
duke@435 | 1605 | |
duke@435 | 1606 | GetModuleFileName(vm_lib_handle, buf, buflen); |
duke@435 | 1607 | strcpy(saved_jvm_path, buf); |
duke@435 | 1608 | } |
duke@435 | 1609 | |
duke@435 | 1610 | |
duke@435 | 1611 | void os::print_jni_name_prefix_on(outputStream* st, int args_size) { |
duke@435 | 1612 | #ifndef _WIN64 |
duke@435 | 1613 | st->print("_"); |
duke@435 | 1614 | #endif |
duke@435 | 1615 | } |
duke@435 | 1616 | |
duke@435 | 1617 | |
duke@435 | 1618 | void os::print_jni_name_suffix_on(outputStream* st, int args_size) { |
duke@435 | 1619 | #ifndef _WIN64 |
duke@435 | 1620 | st->print("@%d", args_size * sizeof(int)); |
duke@435 | 1621 | #endif |
duke@435 | 1622 | } |
duke@435 | 1623 | |
duke@435 | 1624 | // sun.misc.Signal |
duke@435 | 1625 | // NOTE that this is a workaround for an apparent kernel bug where if |
duke@435 | 1626 | // a signal handler for SIGBREAK is installed then that signal handler |
duke@435 | 1627 | // takes priority over the console control handler for CTRL_CLOSE_EVENT. |
duke@435 | 1628 | // See bug 4416763. |
duke@435 | 1629 | static void (*sigbreakHandler)(int) = NULL; |
duke@435 | 1630 | |
duke@435 | 1631 | static void UserHandler(int sig, void *siginfo, void *context) { |
duke@435 | 1632 | os::signal_notify(sig); |
duke@435 | 1633 | // We need to reinstate the signal handler each time... |
duke@435 | 1634 | os::signal(sig, (void*)UserHandler); |
duke@435 | 1635 | } |
duke@435 | 1636 | |
duke@435 | 1637 | void* os::user_handler() { |
duke@435 | 1638 | return (void*) UserHandler; |
duke@435 | 1639 | } |
duke@435 | 1640 | |
duke@435 | 1641 | void* os::signal(int signal_number, void* handler) { |
duke@435 | 1642 | if ((signal_number == SIGBREAK) && (!ReduceSignalUsage)) { |
duke@435 | 1643 | void (*oldHandler)(int) = sigbreakHandler; |
duke@435 | 1644 | sigbreakHandler = (void (*)(int)) handler; |
duke@435 | 1645 | return (void*) oldHandler; |
duke@435 | 1646 | } else { |
duke@435 | 1647 | return (void*)::signal(signal_number, (void (*)(int))handler); |
duke@435 | 1648 | } |
duke@435 | 1649 | } |
duke@435 | 1650 | |
duke@435 | 1651 | void os::signal_raise(int signal_number) { |
duke@435 | 1652 | raise(signal_number); |
duke@435 | 1653 | } |
duke@435 | 1654 | |
duke@435 | 1655 | // The Win32 C runtime library maps all console control events other than ^C |
duke@435 | 1656 | // into SIGBREAK, which makes it impossible to distinguish ^BREAK from close, |
duke@435 | 1657 | // logoff, and shutdown events. We therefore install our own console handler |
duke@435 | 1658 | // that raises SIGTERM for the latter cases. |
duke@435 | 1659 | // |
duke@435 | 1660 | static BOOL WINAPI consoleHandler(DWORD event) { |
duke@435 | 1661 | switch(event) { |
duke@435 | 1662 | case CTRL_C_EVENT: |
duke@435 | 1663 | if (is_error_reported()) { |
duke@435 | 1664 | // Ctrl-C is pressed during error reporting, likely because the error |
duke@435 | 1665 | // handler fails to abort. Let VM die immediately. |
duke@435 | 1666 | os::die(); |
duke@435 | 1667 | } |
duke@435 | 1668 | |
duke@435 | 1669 | os::signal_raise(SIGINT); |
duke@435 | 1670 | return TRUE; |
duke@435 | 1671 | break; |
duke@435 | 1672 | case CTRL_BREAK_EVENT: |
duke@435 | 1673 | if (sigbreakHandler != NULL) { |
duke@435 | 1674 | (*sigbreakHandler)(SIGBREAK); |
duke@435 | 1675 | } |
duke@435 | 1676 | return TRUE; |
duke@435 | 1677 | break; |
duke@435 | 1678 | case CTRL_CLOSE_EVENT: |
duke@435 | 1679 | case CTRL_LOGOFF_EVENT: |
duke@435 | 1680 | case CTRL_SHUTDOWN_EVENT: |
duke@435 | 1681 | os::signal_raise(SIGTERM); |
duke@435 | 1682 | return TRUE; |
duke@435 | 1683 | break; |
duke@435 | 1684 | default: |
duke@435 | 1685 | break; |
duke@435 | 1686 | } |
duke@435 | 1687 | return FALSE; |
duke@435 | 1688 | } |
duke@435 | 1689 | |
duke@435 | 1690 | /* |
duke@435 | 1691 | * The following code is moved from os.cpp for making this |
duke@435 | 1692 | * code platform specific, which it is by its very nature. |
duke@435 | 1693 | */ |
duke@435 | 1694 | |
duke@435 | 1695 | // Return maximum OS signal used + 1 for internal use only |
duke@435 | 1696 | // Used as exit signal for signal_thread |
duke@435 | 1697 | int os::sigexitnum_pd(){ |
duke@435 | 1698 | return NSIG; |
duke@435 | 1699 | } |
duke@435 | 1700 | |
duke@435 | 1701 | // a counter for each possible signal value, including signal_thread exit signal |
duke@435 | 1702 | static volatile jint pending_signals[NSIG+1] = { 0 }; |
duke@435 | 1703 | static HANDLE sig_sem; |
duke@435 | 1704 | |
duke@435 | 1705 | void os::signal_init_pd() { |
duke@435 | 1706 | // Initialize signal structures |
duke@435 | 1707 | memset((void*)pending_signals, 0, sizeof(pending_signals)); |
duke@435 | 1708 | |
duke@435 | 1709 | sig_sem = ::CreateSemaphore(NULL, 0, NSIG+1, NULL); |
duke@435 | 1710 | |
duke@435 | 1711 | // Programs embedding the VM do not want it to attempt to receive |
duke@435 | 1712 | // events like CTRL_LOGOFF_EVENT, which are used to implement the |
duke@435 | 1713 | // shutdown hooks mechanism introduced in 1.3. For example, when |
duke@435 | 1714 | // the VM is run as part of a Windows NT service (i.e., a servlet |
duke@435 | 1715 | // engine in a web server), the correct behavior is for any console |
duke@435 | 1716 | // control handler to return FALSE, not TRUE, because the OS's |
duke@435 | 1717 | // "final" handler for such events allows the process to continue if |
duke@435 | 1718 | // it is a service (while terminating it if it is not a service). |
duke@435 | 1719 | // To make this behavior uniform and the mechanism simpler, we |
duke@435 | 1720 | // completely disable the VM's usage of these console events if -Xrs |
duke@435 | 1721 | // (=ReduceSignalUsage) is specified. This means, for example, that |
duke@435 | 1722 | // the CTRL-BREAK thread dump mechanism is also disabled in this |
duke@435 | 1723 | // case. See bugs 4323062, 4345157, and related bugs. |
duke@435 | 1724 | |
duke@435 | 1725 | if (!ReduceSignalUsage) { |
duke@435 | 1726 | // Add a CTRL-C handler |
duke@435 | 1727 | SetConsoleCtrlHandler(consoleHandler, TRUE); |
duke@435 | 1728 | } |
duke@435 | 1729 | } |
duke@435 | 1730 | |
duke@435 | 1731 | void os::signal_notify(int signal_number) { |
duke@435 | 1732 | BOOL ret; |
duke@435 | 1733 | |
duke@435 | 1734 | Atomic::inc(&pending_signals[signal_number]); |
duke@435 | 1735 | ret = ::ReleaseSemaphore(sig_sem, 1, NULL); |
duke@435 | 1736 | assert(ret != 0, "ReleaseSemaphore() failed"); |
duke@435 | 1737 | } |
duke@435 | 1738 | |
duke@435 | 1739 | static int check_pending_signals(bool wait_for_signal) { |
duke@435 | 1740 | DWORD ret; |
duke@435 | 1741 | while (true) { |
duke@435 | 1742 | for (int i = 0; i < NSIG + 1; i++) { |
duke@435 | 1743 | jint n = pending_signals[i]; |
duke@435 | 1744 | if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { |
duke@435 | 1745 | return i; |
duke@435 | 1746 | } |
duke@435 | 1747 | } |
duke@435 | 1748 | if (!wait_for_signal) { |
duke@435 | 1749 | return -1; |
duke@435 | 1750 | } |
duke@435 | 1751 | |
duke@435 | 1752 | JavaThread *thread = JavaThread::current(); |
duke@435 | 1753 | |
duke@435 | 1754 | ThreadBlockInVM tbivm(thread); |
duke@435 | 1755 | |
duke@435 | 1756 | bool threadIsSuspended; |
duke@435 | 1757 | do { |
duke@435 | 1758 | thread->set_suspend_equivalent(); |
duke@435 | 1759 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
duke@435 | 1760 | ret = ::WaitForSingleObject(sig_sem, INFINITE); |
duke@435 | 1761 | assert(ret == WAIT_OBJECT_0, "WaitForSingleObject() failed"); |
duke@435 | 1762 | |
duke@435 | 1763 | // were we externally suspended while we were waiting? |
duke@435 | 1764 | threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); |
duke@435 | 1765 | if (threadIsSuspended) { |
duke@435 | 1766 | // |
duke@435 | 1767 | // The semaphore has been incremented, but while we were waiting |
duke@435 | 1768 | // another thread suspended us. We don't want to continue running |
duke@435 | 1769 | // while suspended because that would surprise the thread that |
duke@435 | 1770 | // suspended us. |
duke@435 | 1771 | // |
duke@435 | 1772 | ret = ::ReleaseSemaphore(sig_sem, 1, NULL); |
duke@435 | 1773 | assert(ret != 0, "ReleaseSemaphore() failed"); |
duke@435 | 1774 | |
duke@435 | 1775 | thread->java_suspend_self(); |
duke@435 | 1776 | } |
duke@435 | 1777 | } while (threadIsSuspended); |
duke@435 | 1778 | } |
duke@435 | 1779 | } |
duke@435 | 1780 | |
duke@435 | 1781 | int os::signal_lookup() { |
duke@435 | 1782 | return check_pending_signals(false); |
duke@435 | 1783 | } |
duke@435 | 1784 | |
duke@435 | 1785 | int os::signal_wait() { |
duke@435 | 1786 | return check_pending_signals(true); |
duke@435 | 1787 | } |
duke@435 | 1788 | |
duke@435 | 1789 | // Implicit OS exception handling |
duke@435 | 1790 | |
duke@435 | 1791 | LONG Handle_Exception(struct _EXCEPTION_POINTERS* exceptionInfo, address handler) { |
duke@435 | 1792 | JavaThread* thread = JavaThread::current(); |
duke@435 | 1793 | // Save pc in thread |
duke@435 | 1794 | #ifdef _M_IA64 |
duke@435 | 1795 | thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->StIIP); |
duke@435 | 1796 | // Set pc to handler |
duke@435 | 1797 | exceptionInfo->ContextRecord->StIIP = (DWORD64)handler; |
duke@435 | 1798 | #elif _M_AMD64 |
duke@435 | 1799 | thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Rip); |
duke@435 | 1800 | // Set pc to handler |
duke@435 | 1801 | exceptionInfo->ContextRecord->Rip = (DWORD64)handler; |
duke@435 | 1802 | #else |
duke@435 | 1803 | thread->set_saved_exception_pc((address)exceptionInfo->ContextRecord->Eip); |
duke@435 | 1804 | // Set pc to handler |
duke@435 | 1805 | exceptionInfo->ContextRecord->Eip = (LONG)handler; |
duke@435 | 1806 | #endif |
duke@435 | 1807 | |
duke@435 | 1808 | // Continue the execution |
duke@435 | 1809 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 1810 | } |
duke@435 | 1811 | |
duke@435 | 1812 | |
duke@435 | 1813 | // Used for PostMortemDump |
duke@435 | 1814 | extern "C" void safepoints(); |
duke@435 | 1815 | extern "C" void find(int x); |
duke@435 | 1816 | extern "C" void events(); |
duke@435 | 1817 | |
duke@435 | 1818 | // According to Windows API documentation, an illegal instruction sequence should generate |
duke@435 | 1819 | // the 0xC000001C exception code. However, real world experience shows that occasionnaly |
duke@435 | 1820 | // the execution of an illegal instruction can generate the exception code 0xC000001E. This |
duke@435 | 1821 | // seems to be an undocumented feature of Win NT 4.0 (and probably other Windows systems). |
duke@435 | 1822 | |
duke@435 | 1823 | #define EXCEPTION_ILLEGAL_INSTRUCTION_2 0xC000001E |
duke@435 | 1824 | |
duke@435 | 1825 | // From "Execution Protection in the Windows Operating System" draft 0.35 |
duke@435 | 1826 | // Once a system header becomes available, the "real" define should be |
duke@435 | 1827 | // included or copied here. |
duke@435 | 1828 | #define EXCEPTION_INFO_EXEC_VIOLATION 0x08 |
duke@435 | 1829 | |
duke@435 | 1830 | #define def_excpt(val) #val, val |
duke@435 | 1831 | |
duke@435 | 1832 | struct siglabel { |
duke@435 | 1833 | char *name; |
duke@435 | 1834 | int number; |
duke@435 | 1835 | }; |
duke@435 | 1836 | |
duke@435 | 1837 | struct siglabel exceptlabels[] = { |
duke@435 | 1838 | def_excpt(EXCEPTION_ACCESS_VIOLATION), |
duke@435 | 1839 | def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT), |
duke@435 | 1840 | def_excpt(EXCEPTION_BREAKPOINT), |
duke@435 | 1841 | def_excpt(EXCEPTION_SINGLE_STEP), |
duke@435 | 1842 | def_excpt(EXCEPTION_ARRAY_BOUNDS_EXCEEDED), |
duke@435 | 1843 | def_excpt(EXCEPTION_FLT_DENORMAL_OPERAND), |
duke@435 | 1844 | def_excpt(EXCEPTION_FLT_DIVIDE_BY_ZERO), |
duke@435 | 1845 | def_excpt(EXCEPTION_FLT_INEXACT_RESULT), |
duke@435 | 1846 | def_excpt(EXCEPTION_FLT_INVALID_OPERATION), |
duke@435 | 1847 | def_excpt(EXCEPTION_FLT_OVERFLOW), |
duke@435 | 1848 | def_excpt(EXCEPTION_FLT_STACK_CHECK), |
duke@435 | 1849 | def_excpt(EXCEPTION_FLT_UNDERFLOW), |
duke@435 | 1850 | def_excpt(EXCEPTION_INT_DIVIDE_BY_ZERO), |
duke@435 | 1851 | def_excpt(EXCEPTION_INT_OVERFLOW), |
duke@435 | 1852 | def_excpt(EXCEPTION_PRIV_INSTRUCTION), |
duke@435 | 1853 | def_excpt(EXCEPTION_IN_PAGE_ERROR), |
duke@435 | 1854 | def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION), |
duke@435 | 1855 | def_excpt(EXCEPTION_ILLEGAL_INSTRUCTION_2), |
duke@435 | 1856 | def_excpt(EXCEPTION_NONCONTINUABLE_EXCEPTION), |
duke@435 | 1857 | def_excpt(EXCEPTION_STACK_OVERFLOW), |
duke@435 | 1858 | def_excpt(EXCEPTION_INVALID_DISPOSITION), |
duke@435 | 1859 | def_excpt(EXCEPTION_GUARD_PAGE), |
duke@435 | 1860 | def_excpt(EXCEPTION_INVALID_HANDLE), |
duke@435 | 1861 | NULL, 0 |
duke@435 | 1862 | }; |
duke@435 | 1863 | |
duke@435 | 1864 | const char* os::exception_name(int exception_code, char *buf, size_t size) { |
duke@435 | 1865 | for (int i = 0; exceptlabels[i].name != NULL; i++) { |
duke@435 | 1866 | if (exceptlabels[i].number == exception_code) { |
duke@435 | 1867 | jio_snprintf(buf, size, "%s", exceptlabels[i].name); |
duke@435 | 1868 | return buf; |
duke@435 | 1869 | } |
duke@435 | 1870 | } |
duke@435 | 1871 | |
duke@435 | 1872 | return NULL; |
duke@435 | 1873 | } |
duke@435 | 1874 | |
duke@435 | 1875 | //----------------------------------------------------------------------------- |
duke@435 | 1876 | LONG Handle_IDiv_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { |
duke@435 | 1877 | // handle exception caused by idiv; should only happen for -MinInt/-1 |
duke@435 | 1878 | // (division by zero is handled explicitly) |
duke@435 | 1879 | #ifdef _M_IA64 |
duke@435 | 1880 | assert(0, "Fix Handle_IDiv_Exception"); |
duke@435 | 1881 | #elif _M_AMD64 |
duke@435 | 1882 | PCONTEXT ctx = exceptionInfo->ContextRecord; |
duke@435 | 1883 | address pc = (address)ctx->Rip; |
duke@435 | 1884 | NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); |
duke@435 | 1885 | assert(pc[0] == 0xF7, "not an idiv opcode"); |
duke@435 | 1886 | assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); |
duke@435 | 1887 | assert(ctx->Rax == min_jint, "unexpected idiv exception"); |
duke@435 | 1888 | // set correct result values and continue after idiv instruction |
duke@435 | 1889 | ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes |
duke@435 | 1890 | ctx->Rax = (DWORD)min_jint; // result |
duke@435 | 1891 | ctx->Rdx = (DWORD)0; // remainder |
duke@435 | 1892 | // Continue the execution |
duke@435 | 1893 | #else |
duke@435 | 1894 | PCONTEXT ctx = exceptionInfo->ContextRecord; |
duke@435 | 1895 | address pc = (address)ctx->Eip; |
duke@435 | 1896 | NOT_PRODUCT(Events::log("idiv overflow exception at " INTPTR_FORMAT , pc)); |
duke@435 | 1897 | assert(pc[0] == 0xF7, "not an idiv opcode"); |
duke@435 | 1898 | assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); |
duke@435 | 1899 | assert(ctx->Eax == min_jint, "unexpected idiv exception"); |
duke@435 | 1900 | // set correct result values and continue after idiv instruction |
duke@435 | 1901 | ctx->Eip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes |
duke@435 | 1902 | ctx->Eax = (DWORD)min_jint; // result |
duke@435 | 1903 | ctx->Edx = (DWORD)0; // remainder |
duke@435 | 1904 | // Continue the execution |
duke@435 | 1905 | #endif |
duke@435 | 1906 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 1907 | } |
duke@435 | 1908 | |
duke@435 | 1909 | #ifndef _WIN64 |
duke@435 | 1910 | //----------------------------------------------------------------------------- |
duke@435 | 1911 | LONG WINAPI Handle_FLT_Exception(struct _EXCEPTION_POINTERS* exceptionInfo) { |
duke@435 | 1912 | // handle exception caused by native mothod modifying control word |
duke@435 | 1913 | PCONTEXT ctx = exceptionInfo->ContextRecord; |
duke@435 | 1914 | DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; |
duke@435 | 1915 | |
duke@435 | 1916 | switch (exception_code) { |
duke@435 | 1917 | case EXCEPTION_FLT_DENORMAL_OPERAND: |
duke@435 | 1918 | case EXCEPTION_FLT_DIVIDE_BY_ZERO: |
duke@435 | 1919 | case EXCEPTION_FLT_INEXACT_RESULT: |
duke@435 | 1920 | case EXCEPTION_FLT_INVALID_OPERATION: |
duke@435 | 1921 | case EXCEPTION_FLT_OVERFLOW: |
duke@435 | 1922 | case EXCEPTION_FLT_STACK_CHECK: |
duke@435 | 1923 | case EXCEPTION_FLT_UNDERFLOW: |
duke@435 | 1924 | jint fp_control_word = (* (jint*) StubRoutines::addr_fpu_cntrl_wrd_std()); |
duke@435 | 1925 | if (fp_control_word != ctx->FloatSave.ControlWord) { |
duke@435 | 1926 | // Restore FPCW and mask out FLT exceptions |
duke@435 | 1927 | ctx->FloatSave.ControlWord = fp_control_word | 0xffffffc0; |
duke@435 | 1928 | // Mask out pending FLT exceptions |
duke@435 | 1929 | ctx->FloatSave.StatusWord &= 0xffffff00; |
duke@435 | 1930 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 1931 | } |
duke@435 | 1932 | } |
duke@435 | 1933 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 1934 | } |
duke@435 | 1935 | #else //_WIN64 |
duke@435 | 1936 | /* |
duke@435 | 1937 | On Windows, the mxcsr control bits are non-volatile across calls |
duke@435 | 1938 | See also CR 6192333 |
duke@435 | 1939 | If EXCEPTION_FLT_* happened after some native method modified |
duke@435 | 1940 | mxcsr - it is not a jvm fault. |
duke@435 | 1941 | However should we decide to restore of mxcsr after a faulty |
duke@435 | 1942 | native method we can uncomment following code |
duke@435 | 1943 | jint MxCsr = INITIAL_MXCSR; |
duke@435 | 1944 | // we can't use StubRoutines::addr_mxcsr_std() |
duke@435 | 1945 | // because in Win64 mxcsr is not saved there |
duke@435 | 1946 | if (MxCsr != ctx->MxCsr) { |
duke@435 | 1947 | ctx->MxCsr = MxCsr; |
duke@435 | 1948 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 1949 | } |
duke@435 | 1950 | |
duke@435 | 1951 | */ |
duke@435 | 1952 | #endif //_WIN64 |
duke@435 | 1953 | |
duke@435 | 1954 | |
duke@435 | 1955 | // Fatal error reporting is single threaded so we can make this a |
duke@435 | 1956 | // static and preallocated. If it's more than MAX_PATH silently ignore |
duke@435 | 1957 | // it. |
duke@435 | 1958 | static char saved_error_file[MAX_PATH] = {0}; |
duke@435 | 1959 | |
duke@435 | 1960 | void os::set_error_file(const char *logfile) { |
duke@435 | 1961 | if (strlen(logfile) <= MAX_PATH) { |
duke@435 | 1962 | strncpy(saved_error_file, logfile, MAX_PATH); |
duke@435 | 1963 | } |
duke@435 | 1964 | } |
duke@435 | 1965 | |
duke@435 | 1966 | static inline void report_error(Thread* t, DWORD exception_code, |
duke@435 | 1967 | address addr, void* siginfo, void* context) { |
duke@435 | 1968 | VMError err(t, exception_code, addr, siginfo, context); |
duke@435 | 1969 | err.report_and_die(); |
duke@435 | 1970 | |
duke@435 | 1971 | // If UseOsErrorReporting, this will return here and save the error file |
duke@435 | 1972 | // somewhere where we can find it in the minidump. |
duke@435 | 1973 | } |
duke@435 | 1974 | |
duke@435 | 1975 | //----------------------------------------------------------------------------- |
duke@435 | 1976 | LONG WINAPI topLevelExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { |
duke@435 | 1977 | if (InterceptOSException) return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 1978 | DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; |
duke@435 | 1979 | #ifdef _M_IA64 |
duke@435 | 1980 | address pc = (address) exceptionInfo->ContextRecord->StIIP; |
duke@435 | 1981 | #elif _M_AMD64 |
duke@435 | 1982 | address pc = (address) exceptionInfo->ContextRecord->Rip; |
duke@435 | 1983 | #else |
duke@435 | 1984 | address pc = (address) exceptionInfo->ContextRecord->Eip; |
duke@435 | 1985 | #endif |
duke@435 | 1986 | Thread* t = ThreadLocalStorage::get_thread_slow(); // slow & steady |
duke@435 | 1987 | |
duke@435 | 1988 | #ifndef _WIN64 |
duke@435 | 1989 | // Execution protection violation - win32 running on AMD64 only |
duke@435 | 1990 | // Handled first to avoid misdiagnosis as a "normal" access violation; |
duke@435 | 1991 | // This is safe to do because we have a new/unique ExceptionInformation |
duke@435 | 1992 | // code for this condition. |
duke@435 | 1993 | if (exception_code == EXCEPTION_ACCESS_VIOLATION) { |
duke@435 | 1994 | PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; |
duke@435 | 1995 | int exception_subcode = (int) exceptionRecord->ExceptionInformation[0]; |
duke@435 | 1996 | address addr = (address) exceptionRecord->ExceptionInformation[1]; |
duke@435 | 1997 | |
duke@435 | 1998 | if (exception_subcode == EXCEPTION_INFO_EXEC_VIOLATION) { |
duke@435 | 1999 | int page_size = os::vm_page_size(); |
duke@435 | 2000 | |
duke@435 | 2001 | // Make sure the pc and the faulting address are sane. |
duke@435 | 2002 | // |
duke@435 | 2003 | // If an instruction spans a page boundary, and the page containing |
duke@435 | 2004 | // the beginning of the instruction is executable but the following |
duke@435 | 2005 | // page is not, the pc and the faulting address might be slightly |
duke@435 | 2006 | // different - we still want to unguard the 2nd page in this case. |
duke@435 | 2007 | // |
duke@435 | 2008 | // 15 bytes seems to be a (very) safe value for max instruction size. |
duke@435 | 2009 | bool pc_is_near_addr = |
duke@435 | 2010 | (pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15); |
duke@435 | 2011 | bool instr_spans_page_boundary = |
duke@435 | 2012 | (align_size_down((intptr_t) pc ^ (intptr_t) addr, |
duke@435 | 2013 | (intptr_t) page_size) > 0); |
duke@435 | 2014 | |
duke@435 | 2015 | if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) { |
duke@435 | 2016 | static volatile address last_addr = |
duke@435 | 2017 | (address) os::non_memory_address_word(); |
duke@435 | 2018 | |
duke@435 | 2019 | // In conservative mode, don't unguard unless the address is in the VM |
duke@435 | 2020 | if (UnguardOnExecutionViolation > 0 && addr != last_addr && |
duke@435 | 2021 | (UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) { |
duke@435 | 2022 | |
duke@435 | 2023 | // Unguard and retry |
duke@435 | 2024 | address page_start = |
duke@435 | 2025 | (address) align_size_down((intptr_t) addr, (intptr_t) page_size); |
duke@435 | 2026 | bool res = os::unguard_memory((char*) page_start, page_size); |
duke@435 | 2027 | |
duke@435 | 2028 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 2029 | char buf[256]; |
duke@435 | 2030 | jio_snprintf(buf, sizeof(buf), "Execution protection violation " |
duke@435 | 2031 | "at " INTPTR_FORMAT |
duke@435 | 2032 | ", unguarding " INTPTR_FORMAT ": %s", addr, |
duke@435 | 2033 | page_start, (res ? "success" : strerror(errno))); |
duke@435 | 2034 | tty->print_raw_cr(buf); |
duke@435 | 2035 | } |
duke@435 | 2036 | |
duke@435 | 2037 | // Set last_addr so if we fault again at the same address, we don't |
duke@435 | 2038 | // end up in an endless loop. |
duke@435 | 2039 | // |
duke@435 | 2040 | // There are two potential complications here. Two threads trapping |
duke@435 | 2041 | // at the same address at the same time could cause one of the |
duke@435 | 2042 | // threads to think it already unguarded, and abort the VM. Likely |
duke@435 | 2043 | // very rare. |
duke@435 | 2044 | // |
duke@435 | 2045 | // The other race involves two threads alternately trapping at |
duke@435 | 2046 | // different addresses and failing to unguard the page, resulting in |
duke@435 | 2047 | // an endless loop. This condition is probably even more unlikely |
duke@435 | 2048 | // than the first. |
duke@435 | 2049 | // |
duke@435 | 2050 | // Although both cases could be avoided by using locks or thread |
duke@435 | 2051 | // local last_addr, these solutions are unnecessary complication: |
duke@435 | 2052 | // this handler is a best-effort safety net, not a complete solution. |
duke@435 | 2053 | // It is disabled by default and should only be used as a workaround |
duke@435 | 2054 | // in case we missed any no-execute-unsafe VM code. |
duke@435 | 2055 | |
duke@435 | 2056 | last_addr = addr; |
duke@435 | 2057 | |
duke@435 | 2058 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2059 | } |
duke@435 | 2060 | } |
duke@435 | 2061 | |
duke@435 | 2062 | // Last unguard failed or not unguarding |
duke@435 | 2063 | tty->print_raw_cr("Execution protection violation"); |
duke@435 | 2064 | report_error(t, exception_code, addr, exceptionInfo->ExceptionRecord, |
duke@435 | 2065 | exceptionInfo->ContextRecord); |
duke@435 | 2066 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2067 | } |
duke@435 | 2068 | } |
duke@435 | 2069 | #endif // _WIN64 |
duke@435 | 2070 | |
duke@435 | 2071 | // Check to see if we caught the safepoint code in the |
duke@435 | 2072 | // process of write protecting the memory serialization page. |
duke@435 | 2073 | // It write enables the page immediately after protecting it |
duke@435 | 2074 | // so just return. |
duke@435 | 2075 | if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { |
duke@435 | 2076 | JavaThread* thread = (JavaThread*) t; |
duke@435 | 2077 | PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; |
duke@435 | 2078 | address addr = (address) exceptionRecord->ExceptionInformation[1]; |
duke@435 | 2079 | if ( os::is_memory_serialize_page(thread, addr) ) { |
duke@435 | 2080 | // Block current thread until the memory serialize page permission restored. |
duke@435 | 2081 | os::block_on_serialize_page_trap(); |
duke@435 | 2082 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2083 | } |
duke@435 | 2084 | } |
duke@435 | 2085 | |
duke@435 | 2086 | |
duke@435 | 2087 | if (t != NULL && t->is_Java_thread()) { |
duke@435 | 2088 | JavaThread* thread = (JavaThread*) t; |
duke@435 | 2089 | bool in_java = thread->thread_state() == _thread_in_Java; |
duke@435 | 2090 | |
duke@435 | 2091 | // Handle potential stack overflows up front. |
duke@435 | 2092 | if (exception_code == EXCEPTION_STACK_OVERFLOW) { |
duke@435 | 2093 | if (os::uses_stack_guard_pages()) { |
duke@435 | 2094 | #ifdef _M_IA64 |
duke@435 | 2095 | // |
duke@435 | 2096 | // If it's a legal stack address continue, Windows will map it in. |
duke@435 | 2097 | // |
duke@435 | 2098 | PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; |
duke@435 | 2099 | address addr = (address) exceptionRecord->ExceptionInformation[1]; |
duke@435 | 2100 | if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) |
duke@435 | 2101 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2102 | |
duke@435 | 2103 | // The register save area is the same size as the memory stack |
duke@435 | 2104 | // and starts at the page just above the start of the memory stack. |
duke@435 | 2105 | // If we get a fault in this area, we've run out of register |
duke@435 | 2106 | // stack. If we are in java, try throwing a stack overflow exception. |
duke@435 | 2107 | if (addr > thread->stack_base() && |
duke@435 | 2108 | addr <= (thread->stack_base()+thread->stack_size()) ) { |
duke@435 | 2109 | char buf[256]; |
duke@435 | 2110 | jio_snprintf(buf, sizeof(buf), |
duke@435 | 2111 | "Register stack overflow, addr:%p, stack_base:%p\n", |
duke@435 | 2112 | addr, thread->stack_base() ); |
duke@435 | 2113 | tty->print_raw_cr(buf); |
duke@435 | 2114 | // If not in java code, return and hope for the best. |
duke@435 | 2115 | return in_java ? Handle_Exception(exceptionInfo, |
duke@435 | 2116 | SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) |
duke@435 | 2117 | : EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2118 | } |
duke@435 | 2119 | #endif |
duke@435 | 2120 | if (thread->stack_yellow_zone_enabled()) { |
duke@435 | 2121 | // Yellow zone violation. The o/s has unprotected the first yellow |
duke@435 | 2122 | // zone page for us. Note: must call disable_stack_yellow_zone to |
duke@435 | 2123 | // update the enabled status, even if the zone contains only one page. |
duke@435 | 2124 | thread->disable_stack_yellow_zone(); |
duke@435 | 2125 | // If not in java code, return and hope for the best. |
duke@435 | 2126 | return in_java ? Handle_Exception(exceptionInfo, |
duke@435 | 2127 | SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)) |
duke@435 | 2128 | : EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2129 | } else { |
duke@435 | 2130 | // Fatal red zone violation. |
duke@435 | 2131 | thread->disable_stack_red_zone(); |
duke@435 | 2132 | tty->print_raw_cr("An unrecoverable stack overflow has occurred."); |
duke@435 | 2133 | report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, |
duke@435 | 2134 | exceptionInfo->ContextRecord); |
duke@435 | 2135 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2136 | } |
duke@435 | 2137 | } else if (in_java) { |
duke@435 | 2138 | // JVM-managed guard pages cannot be used on win95/98. The o/s provides |
duke@435 | 2139 | // a one-time-only guard page, which it has released to us. The next |
duke@435 | 2140 | // stack overflow on this thread will result in an ACCESS_VIOLATION. |
duke@435 | 2141 | return Handle_Exception(exceptionInfo, |
duke@435 | 2142 | SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); |
duke@435 | 2143 | } else { |
duke@435 | 2144 | // Can only return and hope for the best. Further stack growth will |
duke@435 | 2145 | // result in an ACCESS_VIOLATION. |
duke@435 | 2146 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2147 | } |
duke@435 | 2148 | } else if (exception_code == EXCEPTION_ACCESS_VIOLATION) { |
duke@435 | 2149 | // Either stack overflow or null pointer exception. |
duke@435 | 2150 | if (in_java) { |
duke@435 | 2151 | PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; |
duke@435 | 2152 | address addr = (address) exceptionRecord->ExceptionInformation[1]; |
duke@435 | 2153 | address stack_end = thread->stack_base() - thread->stack_size(); |
duke@435 | 2154 | if (addr < stack_end && addr >= stack_end - os::vm_page_size()) { |
duke@435 | 2155 | // Stack overflow. |
duke@435 | 2156 | assert(!os::uses_stack_guard_pages(), |
duke@435 | 2157 | "should be caught by red zone code above."); |
duke@435 | 2158 | return Handle_Exception(exceptionInfo, |
duke@435 | 2159 | SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); |
duke@435 | 2160 | } |
duke@435 | 2161 | // |
duke@435 | 2162 | // Check for safepoint polling and implicit null |
duke@435 | 2163 | // We only expect null pointers in the stubs (vtable) |
duke@435 | 2164 | // the rest are checked explicitly now. |
duke@435 | 2165 | // |
duke@435 | 2166 | CodeBlob* cb = CodeCache::find_blob(pc); |
duke@435 | 2167 | if (cb != NULL) { |
duke@435 | 2168 | if (os::is_poll_address(addr)) { |
duke@435 | 2169 | address stub = SharedRuntime::get_poll_stub(pc); |
duke@435 | 2170 | return Handle_Exception(exceptionInfo, stub); |
duke@435 | 2171 | } |
duke@435 | 2172 | } |
duke@435 | 2173 | { |
duke@435 | 2174 | #ifdef _WIN64 |
duke@435 | 2175 | // |
duke@435 | 2176 | // If it's a legal stack address map the entire region in |
duke@435 | 2177 | // |
duke@435 | 2178 | PEXCEPTION_RECORD exceptionRecord = exceptionInfo->ExceptionRecord; |
duke@435 | 2179 | address addr = (address) exceptionRecord->ExceptionInformation[1]; |
duke@435 | 2180 | if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) { |
duke@435 | 2181 | addr = (address)((uintptr_t)addr & |
duke@435 | 2182 | (~((uintptr_t)os::vm_page_size() - (uintptr_t)1))); |
duke@435 | 2183 | os::commit_memory( (char *)addr, thread->stack_base() - addr ); |
duke@435 | 2184 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 2185 | } |
duke@435 | 2186 | else |
duke@435 | 2187 | #endif |
duke@435 | 2188 | { |
duke@435 | 2189 | // Null pointer exception. |
duke@435 | 2190 | #ifdef _M_IA64 |
duke@435 | 2191 | // We catch register stack overflows in compiled code by doing |
duke@435 | 2192 | // an explicit compare and executing a st8(G0, G0) if the |
duke@435 | 2193 | // BSP enters into our guard area. We test for the overflow |
duke@435 | 2194 | // condition and fall into the normal null pointer exception |
duke@435 | 2195 | // code if BSP hasn't overflowed. |
duke@435 | 2196 | if ( in_java ) { |
duke@435 | 2197 | if(thread->register_stack_overflow()) { |
duke@435 | 2198 | assert((address)exceptionInfo->ContextRecord->IntS3 == |
duke@435 | 2199 | thread->register_stack_limit(), |
duke@435 | 2200 | "GR7 doesn't contain register_stack_limit"); |
duke@435 | 2201 | // Disable the yellow zone which sets the state that |
duke@435 | 2202 | // we've got a stack overflow problem. |
duke@435 | 2203 | if (thread->stack_yellow_zone_enabled()) { |
duke@435 | 2204 | thread->disable_stack_yellow_zone(); |
duke@435 | 2205 | } |
duke@435 | 2206 | // Give us some room to process the exception |
duke@435 | 2207 | thread->disable_register_stack_guard(); |
duke@435 | 2208 | // Update GR7 with the new limit so we can continue running |
duke@435 | 2209 | // compiled code. |
duke@435 | 2210 | exceptionInfo->ContextRecord->IntS3 = |
duke@435 | 2211 | (ULONGLONG)thread->register_stack_limit(); |
duke@435 | 2212 | return Handle_Exception(exceptionInfo, |
duke@435 | 2213 | SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW)); |
duke@435 | 2214 | } else { |
duke@435 | 2215 | // |
duke@435 | 2216 | // Check for implicit null |
duke@435 | 2217 | // We only expect null pointers in the stubs (vtable) |
duke@435 | 2218 | // the rest are checked explicitly now. |
duke@435 | 2219 | // |
poonam@900 | 2220 | if (((uintptr_t)addr) < os::vm_page_size() ) { |
poonam@900 | 2221 | // an access to the first page of VM--assume it is a null pointer |
poonam@900 | 2222 | address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
poonam@900 | 2223 | if (stub != NULL) return Handle_Exception(exceptionInfo, stub); |
duke@435 | 2224 | } |
duke@435 | 2225 | } |
duke@435 | 2226 | } // in_java |
duke@435 | 2227 | |
duke@435 | 2228 | // IA64 doesn't use implicit null checking yet. So we shouldn't |
duke@435 | 2229 | // get here. |
duke@435 | 2230 | tty->print_raw_cr("Access violation, possible null pointer exception"); |
duke@435 | 2231 | report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, |
duke@435 | 2232 | exceptionInfo->ContextRecord); |
duke@435 | 2233 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2234 | #else /* !IA64 */ |
duke@435 | 2235 | |
duke@435 | 2236 | // Windows 98 reports faulting addresses incorrectly |
duke@435 | 2237 | if (!MacroAssembler::needs_explicit_null_check((intptr_t)addr) || |
duke@435 | 2238 | !os::win32::is_nt()) { |
poonam@900 | 2239 | address stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL); |
poonam@900 | 2240 | if (stub != NULL) return Handle_Exception(exceptionInfo, stub); |
duke@435 | 2241 | } |
duke@435 | 2242 | report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, |
duke@435 | 2243 | exceptionInfo->ContextRecord); |
duke@435 | 2244 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2245 | #endif |
duke@435 | 2246 | } |
duke@435 | 2247 | } |
duke@435 | 2248 | } |
duke@435 | 2249 | |
duke@435 | 2250 | #ifdef _WIN64 |
duke@435 | 2251 | // Special care for fast JNI field accessors. |
duke@435 | 2252 | // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks |
duke@435 | 2253 | // in and the heap gets shrunk before the field access. |
duke@435 | 2254 | if (exception_code == EXCEPTION_ACCESS_VIOLATION) { |
duke@435 | 2255 | address addr = JNI_FastGetField::find_slowcase_pc(pc); |
duke@435 | 2256 | if (addr != (address)-1) { |
duke@435 | 2257 | return Handle_Exception(exceptionInfo, addr); |
duke@435 | 2258 | } |
duke@435 | 2259 | } |
duke@435 | 2260 | #endif |
duke@435 | 2261 | |
duke@435 | 2262 | #ifdef _WIN64 |
duke@435 | 2263 | // Windows will sometimes generate an access violation |
duke@435 | 2264 | // when we call malloc. Since we use VectoredExceptions |
duke@435 | 2265 | // on 64 bit platforms, we see this exception. We must |
duke@435 | 2266 | // pass this exception on so Windows can recover. |
duke@435 | 2267 | // We check to see if the pc of the fault is in NTDLL.DLL |
duke@435 | 2268 | // if so, we pass control on to Windows for handling. |
duke@435 | 2269 | if (UseVectoredExceptions && _addr_in_ntdll(pc)) return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2270 | #endif |
duke@435 | 2271 | |
duke@435 | 2272 | // Stack overflow or null pointer exception in native code. |
duke@435 | 2273 | report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, |
duke@435 | 2274 | exceptionInfo->ContextRecord); |
duke@435 | 2275 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2276 | } |
duke@435 | 2277 | |
duke@435 | 2278 | if (in_java) { |
duke@435 | 2279 | switch (exception_code) { |
duke@435 | 2280 | case EXCEPTION_INT_DIVIDE_BY_ZERO: |
duke@435 | 2281 | return Handle_Exception(exceptionInfo, SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO)); |
duke@435 | 2282 | |
duke@435 | 2283 | case EXCEPTION_INT_OVERFLOW: |
duke@435 | 2284 | return Handle_IDiv_Exception(exceptionInfo); |
duke@435 | 2285 | |
duke@435 | 2286 | } // switch |
duke@435 | 2287 | } |
duke@435 | 2288 | #ifndef _WIN64 |
duke@435 | 2289 | if ((thread->thread_state() == _thread_in_Java) || |
duke@435 | 2290 | (thread->thread_state() == _thread_in_native) ) |
duke@435 | 2291 | { |
duke@435 | 2292 | LONG result=Handle_FLT_Exception(exceptionInfo); |
duke@435 | 2293 | if (result==EXCEPTION_CONTINUE_EXECUTION) return result; |
duke@435 | 2294 | } |
duke@435 | 2295 | #endif //_WIN64 |
duke@435 | 2296 | } |
duke@435 | 2297 | |
duke@435 | 2298 | if (exception_code != EXCEPTION_BREAKPOINT) { |
duke@435 | 2299 | #ifndef _WIN64 |
duke@435 | 2300 | report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, |
duke@435 | 2301 | exceptionInfo->ContextRecord); |
duke@435 | 2302 | #else |
duke@435 | 2303 | // Itanium Windows uses a VectoredExceptionHandler |
duke@435 | 2304 | // Which means that C++ programatic exception handlers (try/except) |
duke@435 | 2305 | // will get here. Continue the search for the right except block if |
duke@435 | 2306 | // the exception code is not a fatal code. |
duke@435 | 2307 | switch ( exception_code ) { |
duke@435 | 2308 | case EXCEPTION_ACCESS_VIOLATION: |
duke@435 | 2309 | case EXCEPTION_STACK_OVERFLOW: |
duke@435 | 2310 | case EXCEPTION_ILLEGAL_INSTRUCTION: |
duke@435 | 2311 | case EXCEPTION_ILLEGAL_INSTRUCTION_2: |
duke@435 | 2312 | case EXCEPTION_INT_OVERFLOW: |
duke@435 | 2313 | case EXCEPTION_INT_DIVIDE_BY_ZERO: |
duke@435 | 2314 | { report_error(t, exception_code, pc, exceptionInfo->ExceptionRecord, |
duke@435 | 2315 | exceptionInfo->ContextRecord); |
duke@435 | 2316 | } |
duke@435 | 2317 | break; |
duke@435 | 2318 | default: |
duke@435 | 2319 | break; |
duke@435 | 2320 | } |
duke@435 | 2321 | #endif |
duke@435 | 2322 | } |
duke@435 | 2323 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2324 | } |
duke@435 | 2325 | |
duke@435 | 2326 | #ifndef _WIN64 |
duke@435 | 2327 | // Special care for fast JNI accessors. |
duke@435 | 2328 | // jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in and |
duke@435 | 2329 | // the heap gets shrunk before the field access. |
duke@435 | 2330 | // Need to install our own structured exception handler since native code may |
duke@435 | 2331 | // install its own. |
duke@435 | 2332 | LONG WINAPI fastJNIAccessorExceptionFilter(struct _EXCEPTION_POINTERS* exceptionInfo) { |
duke@435 | 2333 | DWORD exception_code = exceptionInfo->ExceptionRecord->ExceptionCode; |
duke@435 | 2334 | if (exception_code == EXCEPTION_ACCESS_VIOLATION) { |
duke@435 | 2335 | address pc = (address) exceptionInfo->ContextRecord->Eip; |
duke@435 | 2336 | address addr = JNI_FastGetField::find_slowcase_pc(pc); |
duke@435 | 2337 | if (addr != (address)-1) { |
duke@435 | 2338 | return Handle_Exception(exceptionInfo, addr); |
duke@435 | 2339 | } |
duke@435 | 2340 | } |
duke@435 | 2341 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 2342 | } |
duke@435 | 2343 | |
duke@435 | 2344 | #define DEFINE_FAST_GETFIELD(Return,Fieldname,Result) \ |
duke@435 | 2345 | Return JNICALL jni_fast_Get##Result##Field_wrapper(JNIEnv *env, jobject obj, jfieldID fieldID) { \ |
duke@435 | 2346 | __try { \ |
duke@435 | 2347 | return (*JNI_FastGetField::jni_fast_Get##Result##Field_fp)(env, obj, fieldID); \ |
duke@435 | 2348 | } __except(fastJNIAccessorExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { \ |
duke@435 | 2349 | } \ |
duke@435 | 2350 | return 0; \ |
duke@435 | 2351 | } |
duke@435 | 2352 | |
duke@435 | 2353 | DEFINE_FAST_GETFIELD(jboolean, bool, Boolean) |
duke@435 | 2354 | DEFINE_FAST_GETFIELD(jbyte, byte, Byte) |
duke@435 | 2355 | DEFINE_FAST_GETFIELD(jchar, char, Char) |
duke@435 | 2356 | DEFINE_FAST_GETFIELD(jshort, short, Short) |
duke@435 | 2357 | DEFINE_FAST_GETFIELD(jint, int, Int) |
duke@435 | 2358 | DEFINE_FAST_GETFIELD(jlong, long, Long) |
duke@435 | 2359 | DEFINE_FAST_GETFIELD(jfloat, float, Float) |
duke@435 | 2360 | DEFINE_FAST_GETFIELD(jdouble, double, Double) |
duke@435 | 2361 | |
duke@435 | 2362 | address os::win32::fast_jni_accessor_wrapper(BasicType type) { |
duke@435 | 2363 | switch (type) { |
duke@435 | 2364 | case T_BOOLEAN: return (address)jni_fast_GetBooleanField_wrapper; |
duke@435 | 2365 | case T_BYTE: return (address)jni_fast_GetByteField_wrapper; |
duke@435 | 2366 | case T_CHAR: return (address)jni_fast_GetCharField_wrapper; |
duke@435 | 2367 | case T_SHORT: return (address)jni_fast_GetShortField_wrapper; |
duke@435 | 2368 | case T_INT: return (address)jni_fast_GetIntField_wrapper; |
duke@435 | 2369 | case T_LONG: return (address)jni_fast_GetLongField_wrapper; |
duke@435 | 2370 | case T_FLOAT: return (address)jni_fast_GetFloatField_wrapper; |
duke@435 | 2371 | case T_DOUBLE: return (address)jni_fast_GetDoubleField_wrapper; |
duke@435 | 2372 | default: ShouldNotReachHere(); |
duke@435 | 2373 | } |
duke@435 | 2374 | return (address)-1; |
duke@435 | 2375 | } |
duke@435 | 2376 | #endif |
duke@435 | 2377 | |
duke@435 | 2378 | // Virtual Memory |
duke@435 | 2379 | |
duke@435 | 2380 | int os::vm_page_size() { return os::win32::vm_page_size(); } |
duke@435 | 2381 | int os::vm_allocation_granularity() { |
duke@435 | 2382 | return os::win32::vm_allocation_granularity(); |
duke@435 | 2383 | } |
duke@435 | 2384 | |
duke@435 | 2385 | // Windows large page support is available on Windows 2003. In order to use |
duke@435 | 2386 | // large page memory, the administrator must first assign additional privilege |
duke@435 | 2387 | // to the user: |
duke@435 | 2388 | // + select Control Panel -> Administrative Tools -> Local Security Policy |
duke@435 | 2389 | // + select Local Policies -> User Rights Assignment |
duke@435 | 2390 | // + double click "Lock pages in memory", add users and/or groups |
duke@435 | 2391 | // + reboot |
duke@435 | 2392 | // Note the above steps are needed for administrator as well, as administrators |
duke@435 | 2393 | // by default do not have the privilege to lock pages in memory. |
duke@435 | 2394 | // |
duke@435 | 2395 | // Note about Windows 2003: although the API supports committing large page |
duke@435 | 2396 | // memory on a page-by-page basis and VirtualAlloc() returns success under this |
duke@435 | 2397 | // scenario, I found through experiment it only uses large page if the entire |
duke@435 | 2398 | // memory region is reserved and committed in a single VirtualAlloc() call. |
duke@435 | 2399 | // This makes Windows large page support more or less like Solaris ISM, in |
duke@435 | 2400 | // that the entire heap must be committed upfront. This probably will change |
duke@435 | 2401 | // in the future, if so the code below needs to be revisited. |
duke@435 | 2402 | |
duke@435 | 2403 | #ifndef MEM_LARGE_PAGES |
duke@435 | 2404 | #define MEM_LARGE_PAGES 0x20000000 |
duke@435 | 2405 | #endif |
duke@435 | 2406 | |
duke@435 | 2407 | // GetLargePageMinimum is only available on Windows 2003. The other functions |
duke@435 | 2408 | // are available on NT but not on Windows 98/Me. We have to resolve them at |
duke@435 | 2409 | // runtime. |
duke@435 | 2410 | typedef SIZE_T (WINAPI *GetLargePageMinimum_func_type) (void); |
duke@435 | 2411 | typedef BOOL (WINAPI *AdjustTokenPrivileges_func_type) |
duke@435 | 2412 | (HANDLE, BOOL, PTOKEN_PRIVILEGES, DWORD, PTOKEN_PRIVILEGES, PDWORD); |
duke@435 | 2413 | typedef BOOL (WINAPI *OpenProcessToken_func_type) (HANDLE, DWORD, PHANDLE); |
duke@435 | 2414 | typedef BOOL (WINAPI *LookupPrivilegeValue_func_type) (LPCTSTR, LPCTSTR, PLUID); |
duke@435 | 2415 | |
duke@435 | 2416 | static GetLargePageMinimum_func_type _GetLargePageMinimum; |
duke@435 | 2417 | static AdjustTokenPrivileges_func_type _AdjustTokenPrivileges; |
duke@435 | 2418 | static OpenProcessToken_func_type _OpenProcessToken; |
duke@435 | 2419 | static LookupPrivilegeValue_func_type _LookupPrivilegeValue; |
duke@435 | 2420 | |
duke@435 | 2421 | static HINSTANCE _kernel32; |
duke@435 | 2422 | static HINSTANCE _advapi32; |
duke@435 | 2423 | static HANDLE _hProcess; |
duke@435 | 2424 | static HANDLE _hToken; |
duke@435 | 2425 | |
duke@435 | 2426 | static size_t _large_page_size = 0; |
duke@435 | 2427 | |
duke@435 | 2428 | static bool resolve_functions_for_large_page_init() { |
duke@435 | 2429 | _kernel32 = LoadLibrary("kernel32.dll"); |
duke@435 | 2430 | if (_kernel32 == NULL) return false; |
duke@435 | 2431 | |
duke@435 | 2432 | _GetLargePageMinimum = CAST_TO_FN_PTR(GetLargePageMinimum_func_type, |
duke@435 | 2433 | GetProcAddress(_kernel32, "GetLargePageMinimum")); |
duke@435 | 2434 | if (_GetLargePageMinimum == NULL) return false; |
duke@435 | 2435 | |
duke@435 | 2436 | _advapi32 = LoadLibrary("advapi32.dll"); |
duke@435 | 2437 | if (_advapi32 == NULL) return false; |
duke@435 | 2438 | |
duke@435 | 2439 | _AdjustTokenPrivileges = CAST_TO_FN_PTR(AdjustTokenPrivileges_func_type, |
duke@435 | 2440 | GetProcAddress(_advapi32, "AdjustTokenPrivileges")); |
duke@435 | 2441 | _OpenProcessToken = CAST_TO_FN_PTR(OpenProcessToken_func_type, |
duke@435 | 2442 | GetProcAddress(_advapi32, "OpenProcessToken")); |
duke@435 | 2443 | _LookupPrivilegeValue = CAST_TO_FN_PTR(LookupPrivilegeValue_func_type, |
duke@435 | 2444 | GetProcAddress(_advapi32, "LookupPrivilegeValueA")); |
duke@435 | 2445 | return _AdjustTokenPrivileges != NULL && |
duke@435 | 2446 | _OpenProcessToken != NULL && |
duke@435 | 2447 | _LookupPrivilegeValue != NULL; |
duke@435 | 2448 | } |
duke@435 | 2449 | |
duke@435 | 2450 | static bool request_lock_memory_privilege() { |
duke@435 | 2451 | _hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, |
duke@435 | 2452 | os::current_process_id()); |
duke@435 | 2453 | |
duke@435 | 2454 | LUID luid; |
duke@435 | 2455 | if (_hProcess != NULL && |
duke@435 | 2456 | _OpenProcessToken(_hProcess, TOKEN_ADJUST_PRIVILEGES, &_hToken) && |
duke@435 | 2457 | _LookupPrivilegeValue(NULL, "SeLockMemoryPrivilege", &luid)) { |
duke@435 | 2458 | |
duke@435 | 2459 | TOKEN_PRIVILEGES tp; |
duke@435 | 2460 | tp.PrivilegeCount = 1; |
duke@435 | 2461 | tp.Privileges[0].Luid = luid; |
duke@435 | 2462 | tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; |
duke@435 | 2463 | |
duke@435 | 2464 | // AdjustTokenPrivileges() may return TRUE even when it couldn't change the |
duke@435 | 2465 | // privilege. Check GetLastError() too. See MSDN document. |
duke@435 | 2466 | if (_AdjustTokenPrivileges(_hToken, false, &tp, sizeof(tp), NULL, NULL) && |
duke@435 | 2467 | (GetLastError() == ERROR_SUCCESS)) { |
duke@435 | 2468 | return true; |
duke@435 | 2469 | } |
duke@435 | 2470 | } |
duke@435 | 2471 | |
duke@435 | 2472 | return false; |
duke@435 | 2473 | } |
duke@435 | 2474 | |
duke@435 | 2475 | static void cleanup_after_large_page_init() { |
duke@435 | 2476 | _GetLargePageMinimum = NULL; |
duke@435 | 2477 | _AdjustTokenPrivileges = NULL; |
duke@435 | 2478 | _OpenProcessToken = NULL; |
duke@435 | 2479 | _LookupPrivilegeValue = NULL; |
duke@435 | 2480 | if (_kernel32) FreeLibrary(_kernel32); |
duke@435 | 2481 | _kernel32 = NULL; |
duke@435 | 2482 | if (_advapi32) FreeLibrary(_advapi32); |
duke@435 | 2483 | _advapi32 = NULL; |
duke@435 | 2484 | if (_hProcess) CloseHandle(_hProcess); |
duke@435 | 2485 | _hProcess = NULL; |
duke@435 | 2486 | if (_hToken) CloseHandle(_hToken); |
duke@435 | 2487 | _hToken = NULL; |
duke@435 | 2488 | } |
duke@435 | 2489 | |
duke@435 | 2490 | bool os::large_page_init() { |
duke@435 | 2491 | if (!UseLargePages) return false; |
duke@435 | 2492 | |
duke@435 | 2493 | // print a warning if any large page related flag is specified on command line |
duke@435 | 2494 | bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || |
duke@435 | 2495 | !FLAG_IS_DEFAULT(LargePageSizeInBytes); |
duke@435 | 2496 | bool success = false; |
duke@435 | 2497 | |
duke@435 | 2498 | # define WARN(msg) if (warn_on_failure) { warning(msg); } |
duke@435 | 2499 | if (resolve_functions_for_large_page_init()) { |
duke@435 | 2500 | if (request_lock_memory_privilege()) { |
duke@435 | 2501 | size_t s = _GetLargePageMinimum(); |
duke@435 | 2502 | if (s) { |
duke@435 | 2503 | #if defined(IA32) || defined(AMD64) |
duke@435 | 2504 | if (s > 4*M || LargePageSizeInBytes > 4*M) { |
duke@435 | 2505 | WARN("JVM cannot use large pages bigger than 4mb."); |
duke@435 | 2506 | } else { |
duke@435 | 2507 | #endif |
duke@435 | 2508 | if (LargePageSizeInBytes && LargePageSizeInBytes % s == 0) { |
duke@435 | 2509 | _large_page_size = LargePageSizeInBytes; |
duke@435 | 2510 | } else { |
duke@435 | 2511 | _large_page_size = s; |
duke@435 | 2512 | } |
duke@435 | 2513 | success = true; |
duke@435 | 2514 | #if defined(IA32) || defined(AMD64) |
duke@435 | 2515 | } |
duke@435 | 2516 | #endif |
duke@435 | 2517 | } else { |
duke@435 | 2518 | WARN("Large page is not supported by the processor."); |
duke@435 | 2519 | } |
duke@435 | 2520 | } else { |
duke@435 | 2521 | WARN("JVM cannot use large page memory because it does not have enough privilege to lock pages in memory."); |
duke@435 | 2522 | } |
duke@435 | 2523 | } else { |
duke@435 | 2524 | WARN("Large page is not supported by the operating system."); |
duke@435 | 2525 | } |
duke@435 | 2526 | #undef WARN |
duke@435 | 2527 | |
duke@435 | 2528 | const size_t default_page_size = (size_t) vm_page_size(); |
duke@435 | 2529 | if (success && _large_page_size > default_page_size) { |
duke@435 | 2530 | _page_sizes[0] = _large_page_size; |
duke@435 | 2531 | _page_sizes[1] = default_page_size; |
duke@435 | 2532 | _page_sizes[2] = 0; |
duke@435 | 2533 | } |
duke@435 | 2534 | |
duke@435 | 2535 | cleanup_after_large_page_init(); |
duke@435 | 2536 | return success; |
duke@435 | 2537 | } |
duke@435 | 2538 | |
duke@435 | 2539 | // On win32, one cannot release just a part of reserved memory, it's an |
duke@435 | 2540 | // all or nothing deal. When we split a reservation, we must break the |
duke@435 | 2541 | // reservation into two reservations. |
duke@435 | 2542 | void os::split_reserved_memory(char *base, size_t size, size_t split, |
duke@435 | 2543 | bool realloc) { |
duke@435 | 2544 | if (size > 0) { |
duke@435 | 2545 | release_memory(base, size); |
duke@435 | 2546 | if (realloc) { |
duke@435 | 2547 | reserve_memory(split, base); |
duke@435 | 2548 | } |
duke@435 | 2549 | if (size != split) { |
duke@435 | 2550 | reserve_memory(size - split, base + split); |
duke@435 | 2551 | } |
duke@435 | 2552 | } |
duke@435 | 2553 | } |
duke@435 | 2554 | |
duke@435 | 2555 | char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { |
duke@435 | 2556 | assert((size_t)addr % os::vm_allocation_granularity() == 0, |
duke@435 | 2557 | "reserve alignment"); |
duke@435 | 2558 | assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size"); |
duke@435 | 2559 | char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, |
duke@435 | 2560 | PAGE_EXECUTE_READWRITE); |
duke@435 | 2561 | assert(res == NULL || addr == NULL || addr == res, |
duke@435 | 2562 | "Unexpected address from reserve."); |
duke@435 | 2563 | return res; |
duke@435 | 2564 | } |
duke@435 | 2565 | |
duke@435 | 2566 | // Reserve memory at an arbitrary address, only if that area is |
duke@435 | 2567 | // available (and not reserved for something else). |
duke@435 | 2568 | char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
duke@435 | 2569 | // Windows os::reserve_memory() fails of the requested address range is |
duke@435 | 2570 | // not avilable. |
duke@435 | 2571 | return reserve_memory(bytes, requested_addr); |
duke@435 | 2572 | } |
duke@435 | 2573 | |
duke@435 | 2574 | size_t os::large_page_size() { |
duke@435 | 2575 | return _large_page_size; |
duke@435 | 2576 | } |
duke@435 | 2577 | |
duke@435 | 2578 | bool os::can_commit_large_page_memory() { |
duke@435 | 2579 | // Windows only uses large page memory when the entire region is reserved |
duke@435 | 2580 | // and committed in a single VirtualAlloc() call. This may change in the |
duke@435 | 2581 | // future, but with Windows 2003 it's not possible to commit on demand. |
duke@435 | 2582 | return false; |
duke@435 | 2583 | } |
duke@435 | 2584 | |
jcoomes@514 | 2585 | bool os::can_execute_large_page_memory() { |
jcoomes@514 | 2586 | return true; |
jcoomes@514 | 2587 | } |
jcoomes@514 | 2588 | |
duke@435 | 2589 | char* os::reserve_memory_special(size_t bytes) { |
jmasa@824 | 2590 | |
jmasa@824 | 2591 | if (UseLargePagesIndividualAllocation) { |
jmasa@824 | 2592 | if (TracePageSizes && Verbose) { |
jmasa@824 | 2593 | tty->print_cr("Reserving large pages individually."); |
jmasa@824 | 2594 | } |
jmasa@824 | 2595 | char * p_buf; |
jmasa@824 | 2596 | // first reserve enough address space in advance since we want to be |
jmasa@824 | 2597 | // able to break a single contiguous virtual address range into multiple |
jmasa@824 | 2598 | // large page commits but WS2003 does not allow reserving large page space |
jmasa@824 | 2599 | // so we just use 4K pages for reserve, this gives us a legal contiguous |
jmasa@824 | 2600 | // address space. then we will deallocate that reservation, and re alloc |
jmasa@824 | 2601 | // using large pages |
jmasa@824 | 2602 | const size_t size_of_reserve = bytes + _large_page_size; |
jmasa@824 | 2603 | if (bytes > size_of_reserve) { |
jmasa@824 | 2604 | // Overflowed. |
jmasa@824 | 2605 | warning("Individually allocated large pages failed, " |
jmasa@824 | 2606 | "use -XX:-UseLargePagesIndividualAllocation to turn off"); |
jmasa@824 | 2607 | return NULL; |
jmasa@824 | 2608 | } |
jmasa@824 | 2609 | p_buf = (char *) VirtualAlloc(NULL, |
jmasa@824 | 2610 | size_of_reserve, // size of Reserve |
jmasa@824 | 2611 | MEM_RESERVE, |
jmasa@824 | 2612 | PAGE_EXECUTE_READWRITE); |
jmasa@824 | 2613 | // If reservation failed, return NULL |
jmasa@824 | 2614 | if (p_buf == NULL) return NULL; |
jmasa@824 | 2615 | |
jmasa@824 | 2616 | release_memory(p_buf, bytes + _large_page_size); |
jmasa@824 | 2617 | // round up to page boundary. If the size_of_reserve did not |
jmasa@824 | 2618 | // overflow and the reservation did not fail, this align up |
jmasa@824 | 2619 | // should not overflow. |
jmasa@824 | 2620 | p_buf = (char *) align_size_up((size_t)p_buf, _large_page_size); |
jmasa@824 | 2621 | |
jmasa@824 | 2622 | // now go through and allocate one page at a time until all bytes are |
jmasa@824 | 2623 | // allocated |
jmasa@824 | 2624 | size_t bytes_remaining = align_size_up(bytes, _large_page_size); |
jmasa@824 | 2625 | // An overflow of align_size_up() would have been caught above |
jmasa@824 | 2626 | // in the calculation of size_of_reserve. |
jmasa@824 | 2627 | char * next_alloc_addr = p_buf; |
jmasa@824 | 2628 | |
jmasa@824 | 2629 | #ifdef ASSERT |
jmasa@824 | 2630 | // Variable for the failure injection |
jmasa@824 | 2631 | long ran_num = os::random(); |
jmasa@824 | 2632 | size_t fail_after = ran_num % bytes; |
jmasa@824 | 2633 | #endif |
jmasa@824 | 2634 | |
jmasa@824 | 2635 | while (bytes_remaining) { |
jmasa@824 | 2636 | size_t bytes_to_rq = MIN2(bytes_remaining, _large_page_size); |
jmasa@824 | 2637 | // Note allocate and commit |
jmasa@824 | 2638 | char * p_new; |
jmasa@824 | 2639 | |
jmasa@824 | 2640 | #ifdef ASSERT |
jmasa@824 | 2641 | bool inject_error = LargePagesIndividualAllocationInjectError && |
jmasa@824 | 2642 | (bytes_remaining <= fail_after); |
jmasa@824 | 2643 | #else |
jmasa@824 | 2644 | const bool inject_error = false; |
jmasa@824 | 2645 | #endif |
jmasa@824 | 2646 | |
jmasa@824 | 2647 | if (inject_error) { |
jmasa@824 | 2648 | p_new = NULL; |
jmasa@824 | 2649 | } else { |
jmasa@824 | 2650 | p_new = (char *) VirtualAlloc(next_alloc_addr, |
jmasa@824 | 2651 | bytes_to_rq, |
jmasa@824 | 2652 | MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES, |
jmasa@824 | 2653 | PAGE_EXECUTE_READWRITE); |
jmasa@824 | 2654 | } |
jmasa@824 | 2655 | |
jmasa@824 | 2656 | if (p_new == NULL) { |
jmasa@824 | 2657 | // Free any allocated pages |
jmasa@824 | 2658 | if (next_alloc_addr > p_buf) { |
jmasa@824 | 2659 | // Some memory was committed so release it. |
jmasa@824 | 2660 | size_t bytes_to_release = bytes - bytes_remaining; |
jmasa@824 | 2661 | release_memory(p_buf, bytes_to_release); |
jmasa@824 | 2662 | } |
jmasa@824 | 2663 | #ifdef ASSERT |
jmasa@824 | 2664 | if (UseLargePagesIndividualAllocation && |
jmasa@824 | 2665 | LargePagesIndividualAllocationInjectError) { |
jmasa@824 | 2666 | if (TracePageSizes && Verbose) { |
jmasa@824 | 2667 | tty->print_cr("Reserving large pages individually failed."); |
jmasa@824 | 2668 | } |
jmasa@824 | 2669 | } |
jmasa@824 | 2670 | #endif |
jmasa@824 | 2671 | return NULL; |
jmasa@824 | 2672 | } |
jmasa@824 | 2673 | bytes_remaining -= bytes_to_rq; |
jmasa@824 | 2674 | next_alloc_addr += bytes_to_rq; |
jmasa@824 | 2675 | } |
jmasa@824 | 2676 | |
jmasa@824 | 2677 | return p_buf; |
jmasa@824 | 2678 | |
jmasa@824 | 2679 | } else { |
jmasa@824 | 2680 | // normal policy just allocate it all at once |
jmasa@824 | 2681 | DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES; |
jmasa@824 | 2682 | char * res = (char *)VirtualAlloc(NULL, |
jmasa@824 | 2683 | bytes, |
jmasa@824 | 2684 | flag, |
jmasa@824 | 2685 | PAGE_EXECUTE_READWRITE); |
jmasa@824 | 2686 | return res; |
jmasa@824 | 2687 | } |
duke@435 | 2688 | } |
duke@435 | 2689 | |
duke@435 | 2690 | bool os::release_memory_special(char* base, size_t bytes) { |
duke@435 | 2691 | return release_memory(base, bytes); |
duke@435 | 2692 | } |
duke@435 | 2693 | |
duke@435 | 2694 | void os::print_statistics() { |
duke@435 | 2695 | } |
duke@435 | 2696 | |
duke@435 | 2697 | bool os::commit_memory(char* addr, size_t bytes) { |
duke@435 | 2698 | if (bytes == 0) { |
duke@435 | 2699 | // Don't bother the OS with noops. |
duke@435 | 2700 | return true; |
duke@435 | 2701 | } |
duke@435 | 2702 | assert((size_t) addr % os::vm_page_size() == 0, "commit on page boundaries"); |
duke@435 | 2703 | assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks"); |
duke@435 | 2704 | // Don't attempt to print anything if the OS call fails. We're |
duke@435 | 2705 | // probably low on resources, so the print itself may cause crashes. |
duke@435 | 2706 | return VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE) != NULL; |
duke@435 | 2707 | } |
duke@435 | 2708 | |
duke@435 | 2709 | bool os::commit_memory(char* addr, size_t size, size_t alignment_hint) { |
duke@435 | 2710 | return commit_memory(addr, size); |
duke@435 | 2711 | } |
duke@435 | 2712 | |
duke@435 | 2713 | bool os::uncommit_memory(char* addr, size_t bytes) { |
duke@435 | 2714 | if (bytes == 0) { |
duke@435 | 2715 | // Don't bother the OS with noops. |
duke@435 | 2716 | return true; |
duke@435 | 2717 | } |
duke@435 | 2718 | assert((size_t) addr % os::vm_page_size() == 0, "uncommit on page boundaries"); |
duke@435 | 2719 | assert(bytes % os::vm_page_size() == 0, "uncommit in page-sized chunks"); |
duke@435 | 2720 | return VirtualFree(addr, bytes, MEM_DECOMMIT) != 0; |
duke@435 | 2721 | } |
duke@435 | 2722 | |
duke@435 | 2723 | bool os::release_memory(char* addr, size_t bytes) { |
duke@435 | 2724 | return VirtualFree(addr, 0, MEM_RELEASE) != 0; |
duke@435 | 2725 | } |
duke@435 | 2726 | |
coleenp@672 | 2727 | // Set protections specified |
coleenp@672 | 2728 | bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
coleenp@672 | 2729 | bool is_committed) { |
coleenp@672 | 2730 | unsigned int p = 0; |
coleenp@672 | 2731 | switch (prot) { |
coleenp@672 | 2732 | case MEM_PROT_NONE: p = PAGE_NOACCESS; break; |
coleenp@672 | 2733 | case MEM_PROT_READ: p = PAGE_READONLY; break; |
coleenp@672 | 2734 | case MEM_PROT_RW: p = PAGE_READWRITE; break; |
coleenp@672 | 2735 | case MEM_PROT_RWX: p = PAGE_EXECUTE_READWRITE; break; |
coleenp@672 | 2736 | default: |
coleenp@672 | 2737 | ShouldNotReachHere(); |
coleenp@672 | 2738 | } |
coleenp@672 | 2739 | |
duke@435 | 2740 | DWORD old_status; |
coleenp@672 | 2741 | |
coleenp@672 | 2742 | // Strange enough, but on Win32 one can change protection only for committed |
coleenp@672 | 2743 | // memory, not a big deal anyway, as bytes less or equal than 64K |
coleenp@672 | 2744 | if (!is_committed && !commit_memory(addr, bytes)) { |
coleenp@672 | 2745 | fatal("cannot commit protection page"); |
coleenp@672 | 2746 | } |
coleenp@672 | 2747 | // One cannot use os::guard_memory() here, as on Win32 guard page |
coleenp@672 | 2748 | // have different (one-shot) semantics, from MSDN on PAGE_GUARD: |
coleenp@672 | 2749 | // |
coleenp@672 | 2750 | // Pages in the region become guard pages. Any attempt to access a guard page |
coleenp@672 | 2751 | // causes the system to raise a STATUS_GUARD_PAGE exception and turn off |
coleenp@672 | 2752 | // the guard page status. Guard pages thus act as a one-time access alarm. |
coleenp@672 | 2753 | return VirtualProtect(addr, bytes, p, &old_status) != 0; |
duke@435 | 2754 | } |
duke@435 | 2755 | |
duke@435 | 2756 | bool os::guard_memory(char* addr, size_t bytes) { |
duke@435 | 2757 | DWORD old_status; |
duke@435 | 2758 | return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE | PAGE_GUARD, &old_status) != 0; |
duke@435 | 2759 | } |
duke@435 | 2760 | |
duke@435 | 2761 | bool os::unguard_memory(char* addr, size_t bytes) { |
duke@435 | 2762 | DWORD old_status; |
duke@435 | 2763 | return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &old_status) != 0; |
duke@435 | 2764 | } |
duke@435 | 2765 | |
duke@435 | 2766 | void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { } |
duke@435 | 2767 | void os::free_memory(char *addr, size_t bytes) { } |
duke@435 | 2768 | void os::numa_make_global(char *addr, size_t bytes) { } |
iveresov@576 | 2769 | void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { } |
duke@435 | 2770 | bool os::numa_topology_changed() { return false; } |
duke@435 | 2771 | size_t os::numa_get_groups_num() { return 1; } |
duke@435 | 2772 | int os::numa_get_group_id() { return 0; } |
duke@435 | 2773 | size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
duke@435 | 2774 | if (size > 0) { |
duke@435 | 2775 | ids[0] = 0; |
duke@435 | 2776 | return 1; |
duke@435 | 2777 | } |
duke@435 | 2778 | return 0; |
duke@435 | 2779 | } |
duke@435 | 2780 | |
duke@435 | 2781 | bool os::get_page_info(char *start, page_info* info) { |
duke@435 | 2782 | return false; |
duke@435 | 2783 | } |
duke@435 | 2784 | |
duke@435 | 2785 | char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { |
duke@435 | 2786 | return end; |
duke@435 | 2787 | } |
duke@435 | 2788 | |
duke@435 | 2789 | char* os::non_memory_address_word() { |
duke@435 | 2790 | // Must never look like an address returned by reserve_memory, |
duke@435 | 2791 | // even in its subfields (as defined by the CPU immediate fields, |
duke@435 | 2792 | // if the CPU splits constants across multiple instructions). |
duke@435 | 2793 | return (char*)-1; |
duke@435 | 2794 | } |
duke@435 | 2795 | |
duke@435 | 2796 | #define MAX_ERROR_COUNT 100 |
duke@435 | 2797 | #define SYS_THREAD_ERROR 0xffffffffUL |
duke@435 | 2798 | |
duke@435 | 2799 | void os::pd_start_thread(Thread* thread) { |
duke@435 | 2800 | DWORD ret = ResumeThread(thread->osthread()->thread_handle()); |
duke@435 | 2801 | // Returns previous suspend state: |
duke@435 | 2802 | // 0: Thread was not suspended |
duke@435 | 2803 | // 1: Thread is running now |
duke@435 | 2804 | // >1: Thread is still suspended. |
duke@435 | 2805 | assert(ret != SYS_THREAD_ERROR, "StartThread failed"); // should propagate back |
duke@435 | 2806 | } |
duke@435 | 2807 | |
duke@435 | 2808 | size_t os::read(int fd, void *buf, unsigned int nBytes) { |
duke@435 | 2809 | return ::read(fd, buf, nBytes); |
duke@435 | 2810 | } |
duke@435 | 2811 | |
duke@435 | 2812 | class HighResolutionInterval { |
duke@435 | 2813 | // The default timer resolution seems to be 10 milliseconds. |
duke@435 | 2814 | // (Where is this written down?) |
duke@435 | 2815 | // If someone wants to sleep for only a fraction of the default, |
duke@435 | 2816 | // then we set the timer resolution down to 1 millisecond for |
duke@435 | 2817 | // the duration of their interval. |
duke@435 | 2818 | // We carefully set the resolution back, since otherwise we |
duke@435 | 2819 | // seem to incur an overhead (3%?) that we don't need. |
duke@435 | 2820 | // CONSIDER: if ms is small, say 3, then we should run with a high resolution time. |
duke@435 | 2821 | // Buf if ms is large, say 500, or 503, we should avoid the call to timeBeginPeriod(). |
duke@435 | 2822 | // Alternatively, we could compute the relative error (503/500 = .6%) and only use |
duke@435 | 2823 | // timeBeginPeriod() if the relative error exceeded some threshold. |
duke@435 | 2824 | // timeBeginPeriod() has been linked to problems with clock drift on win32 systems and |
duke@435 | 2825 | // to decreased efficiency related to increased timer "tick" rates. We want to minimize |
duke@435 | 2826 | // (a) calls to timeBeginPeriod() and timeEndPeriod() and (b) time spent with high |
duke@435 | 2827 | // resolution timers running. |
duke@435 | 2828 | private: |
duke@435 | 2829 | jlong resolution; |
duke@435 | 2830 | public: |
duke@435 | 2831 | HighResolutionInterval(jlong ms) { |
duke@435 | 2832 | resolution = ms % 10L; |
duke@435 | 2833 | if (resolution != 0) { |
duke@435 | 2834 | MMRESULT result = timeBeginPeriod(1L); |
duke@435 | 2835 | } |
duke@435 | 2836 | } |
duke@435 | 2837 | ~HighResolutionInterval() { |
duke@435 | 2838 | if (resolution != 0) { |
duke@435 | 2839 | MMRESULT result = timeEndPeriod(1L); |
duke@435 | 2840 | } |
duke@435 | 2841 | resolution = 0L; |
duke@435 | 2842 | } |
duke@435 | 2843 | }; |
duke@435 | 2844 | |
duke@435 | 2845 | int os::sleep(Thread* thread, jlong ms, bool interruptable) { |
duke@435 | 2846 | jlong limit = (jlong) MAXDWORD; |
duke@435 | 2847 | |
duke@435 | 2848 | while(ms > limit) { |
duke@435 | 2849 | int res; |
duke@435 | 2850 | if ((res = sleep(thread, limit, interruptable)) != OS_TIMEOUT) |
duke@435 | 2851 | return res; |
duke@435 | 2852 | ms -= limit; |
duke@435 | 2853 | } |
duke@435 | 2854 | |
duke@435 | 2855 | assert(thread == Thread::current(), "thread consistency check"); |
duke@435 | 2856 | OSThread* osthread = thread->osthread(); |
duke@435 | 2857 | OSThreadWaitState osts(osthread, false /* not Object.wait() */); |
duke@435 | 2858 | int result; |
duke@435 | 2859 | if (interruptable) { |
duke@435 | 2860 | assert(thread->is_Java_thread(), "must be java thread"); |
duke@435 | 2861 | JavaThread *jt = (JavaThread *) thread; |
duke@435 | 2862 | ThreadBlockInVM tbivm(jt); |
duke@435 | 2863 | |
duke@435 | 2864 | jt->set_suspend_equivalent(); |
duke@435 | 2865 | // cleared by handle_special_suspend_equivalent_condition() or |
duke@435 | 2866 | // java_suspend_self() via check_and_wait_while_suspended() |
duke@435 | 2867 | |
duke@435 | 2868 | HANDLE events[1]; |
duke@435 | 2869 | events[0] = osthread->interrupt_event(); |
duke@435 | 2870 | HighResolutionInterval *phri=NULL; |
duke@435 | 2871 | if(!ForceTimeHighResolution) |
duke@435 | 2872 | phri = new HighResolutionInterval( ms ); |
duke@435 | 2873 | if (WaitForMultipleObjects(1, events, FALSE, (DWORD)ms) == WAIT_TIMEOUT) { |
duke@435 | 2874 | result = OS_TIMEOUT; |
duke@435 | 2875 | } else { |
duke@435 | 2876 | ResetEvent(osthread->interrupt_event()); |
duke@435 | 2877 | osthread->set_interrupted(false); |
duke@435 | 2878 | result = OS_INTRPT; |
duke@435 | 2879 | } |
duke@435 | 2880 | delete phri; //if it is NULL, harmless |
duke@435 | 2881 | |
duke@435 | 2882 | // were we externally suspended while we were waiting? |
duke@435 | 2883 | jt->check_and_wait_while_suspended(); |
duke@435 | 2884 | } else { |
duke@435 | 2885 | assert(!thread->is_Java_thread(), "must not be java thread"); |
duke@435 | 2886 | Sleep((long) ms); |
duke@435 | 2887 | result = OS_TIMEOUT; |
duke@435 | 2888 | } |
duke@435 | 2889 | return result; |
duke@435 | 2890 | } |
duke@435 | 2891 | |
duke@435 | 2892 | // Sleep forever; naked call to OS-specific sleep; use with CAUTION |
duke@435 | 2893 | void os::infinite_sleep() { |
duke@435 | 2894 | while (true) { // sleep forever ... |
duke@435 | 2895 | Sleep(100000); // ... 100 seconds at a time |
duke@435 | 2896 | } |
duke@435 | 2897 | } |
duke@435 | 2898 | |
duke@435 | 2899 | typedef BOOL (WINAPI * STTSignature)(void) ; |
duke@435 | 2900 | |
duke@435 | 2901 | os::YieldResult os::NakedYield() { |
duke@435 | 2902 | // Use either SwitchToThread() or Sleep(0) |
duke@435 | 2903 | // Consider passing back the return value from SwitchToThread(). |
duke@435 | 2904 | // We use GetProcAddress() as ancient Win9X versions of windows doen't support SwitchToThread. |
duke@435 | 2905 | // In that case we revert to Sleep(0). |
duke@435 | 2906 | static volatile STTSignature stt = (STTSignature) 1 ; |
duke@435 | 2907 | |
duke@435 | 2908 | if (stt == ((STTSignature) 1)) { |
duke@435 | 2909 | stt = (STTSignature) ::GetProcAddress (LoadLibrary ("Kernel32.dll"), "SwitchToThread") ; |
duke@435 | 2910 | // It's OK if threads race during initialization as the operation above is idempotent. |
duke@435 | 2911 | } |
duke@435 | 2912 | if (stt != NULL) { |
duke@435 | 2913 | return (*stt)() ? os::YIELD_SWITCHED : os::YIELD_NONEREADY ; |
duke@435 | 2914 | } else { |
duke@435 | 2915 | Sleep (0) ; |
duke@435 | 2916 | } |
duke@435 | 2917 | return os::YIELD_UNKNOWN ; |
duke@435 | 2918 | } |
duke@435 | 2919 | |
duke@435 | 2920 | void os::yield() { os::NakedYield(); } |
duke@435 | 2921 | |
duke@435 | 2922 | void os::yield_all(int attempts) { |
duke@435 | 2923 | // Yields to all threads, including threads with lower priorities |
duke@435 | 2924 | Sleep(1); |
duke@435 | 2925 | } |
duke@435 | 2926 | |
duke@435 | 2927 | // Win32 only gives you access to seven real priorities at a time, |
duke@435 | 2928 | // so we compress Java's ten down to seven. It would be better |
duke@435 | 2929 | // if we dynamically adjusted relative priorities. |
duke@435 | 2930 | |
duke@435 | 2931 | int os::java_to_os_priority[MaxPriority + 1] = { |
duke@435 | 2932 | THREAD_PRIORITY_IDLE, // 0 Entry should never be used |
duke@435 | 2933 | THREAD_PRIORITY_LOWEST, // 1 MinPriority |
duke@435 | 2934 | THREAD_PRIORITY_LOWEST, // 2 |
duke@435 | 2935 | THREAD_PRIORITY_BELOW_NORMAL, // 3 |
duke@435 | 2936 | THREAD_PRIORITY_BELOW_NORMAL, // 4 |
duke@435 | 2937 | THREAD_PRIORITY_NORMAL, // 5 NormPriority |
duke@435 | 2938 | THREAD_PRIORITY_NORMAL, // 6 |
duke@435 | 2939 | THREAD_PRIORITY_ABOVE_NORMAL, // 7 |
duke@435 | 2940 | THREAD_PRIORITY_ABOVE_NORMAL, // 8 |
duke@435 | 2941 | THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority |
duke@435 | 2942 | THREAD_PRIORITY_HIGHEST // 10 MaxPriority |
duke@435 | 2943 | }; |
duke@435 | 2944 | |
duke@435 | 2945 | int prio_policy1[MaxPriority + 1] = { |
duke@435 | 2946 | THREAD_PRIORITY_IDLE, // 0 Entry should never be used |
duke@435 | 2947 | THREAD_PRIORITY_LOWEST, // 1 MinPriority |
duke@435 | 2948 | THREAD_PRIORITY_LOWEST, // 2 |
duke@435 | 2949 | THREAD_PRIORITY_BELOW_NORMAL, // 3 |
duke@435 | 2950 | THREAD_PRIORITY_BELOW_NORMAL, // 4 |
duke@435 | 2951 | THREAD_PRIORITY_NORMAL, // 5 NormPriority |
duke@435 | 2952 | THREAD_PRIORITY_ABOVE_NORMAL, // 6 |
duke@435 | 2953 | THREAD_PRIORITY_ABOVE_NORMAL, // 7 |
duke@435 | 2954 | THREAD_PRIORITY_HIGHEST, // 8 |
duke@435 | 2955 | THREAD_PRIORITY_HIGHEST, // 9 NearMaxPriority |
duke@435 | 2956 | THREAD_PRIORITY_TIME_CRITICAL // 10 MaxPriority |
duke@435 | 2957 | }; |
duke@435 | 2958 | |
duke@435 | 2959 | static int prio_init() { |
duke@435 | 2960 | // If ThreadPriorityPolicy is 1, switch tables |
duke@435 | 2961 | if (ThreadPriorityPolicy == 1) { |
duke@435 | 2962 | int i; |
duke@435 | 2963 | for (i = 0; i < MaxPriority + 1; i++) { |
duke@435 | 2964 | os::java_to_os_priority[i] = prio_policy1[i]; |
duke@435 | 2965 | } |
duke@435 | 2966 | } |
duke@435 | 2967 | return 0; |
duke@435 | 2968 | } |
duke@435 | 2969 | |
duke@435 | 2970 | OSReturn os::set_native_priority(Thread* thread, int priority) { |
duke@435 | 2971 | if (!UseThreadPriorities) return OS_OK; |
duke@435 | 2972 | bool ret = SetThreadPriority(thread->osthread()->thread_handle(), priority) != 0; |
duke@435 | 2973 | return ret ? OS_OK : OS_ERR; |
duke@435 | 2974 | } |
duke@435 | 2975 | |
duke@435 | 2976 | OSReturn os::get_native_priority(const Thread* const thread, int* priority_ptr) { |
duke@435 | 2977 | if ( !UseThreadPriorities ) { |
duke@435 | 2978 | *priority_ptr = java_to_os_priority[NormPriority]; |
duke@435 | 2979 | return OS_OK; |
duke@435 | 2980 | } |
duke@435 | 2981 | int os_prio = GetThreadPriority(thread->osthread()->thread_handle()); |
duke@435 | 2982 | if (os_prio == THREAD_PRIORITY_ERROR_RETURN) { |
duke@435 | 2983 | assert(false, "GetThreadPriority failed"); |
duke@435 | 2984 | return OS_ERR; |
duke@435 | 2985 | } |
duke@435 | 2986 | *priority_ptr = os_prio; |
duke@435 | 2987 | return OS_OK; |
duke@435 | 2988 | } |
duke@435 | 2989 | |
duke@435 | 2990 | |
duke@435 | 2991 | // Hint to the underlying OS that a task switch would not be good. |
duke@435 | 2992 | // Void return because it's a hint and can fail. |
duke@435 | 2993 | void os::hint_no_preempt() {} |
duke@435 | 2994 | |
duke@435 | 2995 | void os::interrupt(Thread* thread) { |
duke@435 | 2996 | assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), |
duke@435 | 2997 | "possibility of dangling Thread pointer"); |
duke@435 | 2998 | |
duke@435 | 2999 | OSThread* osthread = thread->osthread(); |
duke@435 | 3000 | osthread->set_interrupted(true); |
duke@435 | 3001 | // More than one thread can get here with the same value of osthread, |
duke@435 | 3002 | // resulting in multiple notifications. We do, however, want the store |
duke@435 | 3003 | // to interrupted() to be visible to other threads before we post |
duke@435 | 3004 | // the interrupt event. |
duke@435 | 3005 | OrderAccess::release(); |
duke@435 | 3006 | SetEvent(osthread->interrupt_event()); |
duke@435 | 3007 | // For JSR166: unpark after setting status |
duke@435 | 3008 | if (thread->is_Java_thread()) |
duke@435 | 3009 | ((JavaThread*)thread)->parker()->unpark(); |
duke@435 | 3010 | |
duke@435 | 3011 | ParkEvent * ev = thread->_ParkEvent ; |
duke@435 | 3012 | if (ev != NULL) ev->unpark() ; |
duke@435 | 3013 | |
duke@435 | 3014 | } |
duke@435 | 3015 | |
duke@435 | 3016 | |
duke@435 | 3017 | bool os::is_interrupted(Thread* thread, bool clear_interrupted) { |
duke@435 | 3018 | assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), |
duke@435 | 3019 | "possibility of dangling Thread pointer"); |
duke@435 | 3020 | |
duke@435 | 3021 | OSThread* osthread = thread->osthread(); |
duke@435 | 3022 | bool interrupted; |
duke@435 | 3023 | interrupted = osthread->interrupted(); |
duke@435 | 3024 | if (clear_interrupted == true) { |
duke@435 | 3025 | osthread->set_interrupted(false); |
duke@435 | 3026 | ResetEvent(osthread->interrupt_event()); |
duke@435 | 3027 | } // Otherwise leave the interrupted state alone |
duke@435 | 3028 | |
duke@435 | 3029 | return interrupted; |
duke@435 | 3030 | } |
duke@435 | 3031 | |
duke@435 | 3032 | // Get's a pc (hint) for a running thread. Currently used only for profiling. |
duke@435 | 3033 | ExtendedPC os::get_thread_pc(Thread* thread) { |
duke@435 | 3034 | CONTEXT context; |
duke@435 | 3035 | context.ContextFlags = CONTEXT_CONTROL; |
duke@435 | 3036 | HANDLE handle = thread->osthread()->thread_handle(); |
duke@435 | 3037 | #ifdef _M_IA64 |
duke@435 | 3038 | assert(0, "Fix get_thread_pc"); |
duke@435 | 3039 | return ExtendedPC(NULL); |
duke@435 | 3040 | #else |
duke@435 | 3041 | if (GetThreadContext(handle, &context)) { |
duke@435 | 3042 | #ifdef _M_AMD64 |
duke@435 | 3043 | return ExtendedPC((address) context.Rip); |
duke@435 | 3044 | #else |
duke@435 | 3045 | return ExtendedPC((address) context.Eip); |
duke@435 | 3046 | #endif |
duke@435 | 3047 | } else { |
duke@435 | 3048 | return ExtendedPC(NULL); |
duke@435 | 3049 | } |
duke@435 | 3050 | #endif |
duke@435 | 3051 | } |
duke@435 | 3052 | |
duke@435 | 3053 | // GetCurrentThreadId() returns DWORD |
duke@435 | 3054 | intx os::current_thread_id() { return GetCurrentThreadId(); } |
duke@435 | 3055 | |
duke@435 | 3056 | static int _initial_pid = 0; |
duke@435 | 3057 | |
duke@435 | 3058 | int os::current_process_id() |
duke@435 | 3059 | { |
duke@435 | 3060 | return (_initial_pid ? _initial_pid : _getpid()); |
duke@435 | 3061 | } |
duke@435 | 3062 | |
duke@435 | 3063 | int os::win32::_vm_page_size = 0; |
duke@435 | 3064 | int os::win32::_vm_allocation_granularity = 0; |
duke@435 | 3065 | int os::win32::_processor_type = 0; |
duke@435 | 3066 | // Processor level is not available on non-NT systems, use vm_version instead |
duke@435 | 3067 | int os::win32::_processor_level = 0; |
duke@435 | 3068 | julong os::win32::_physical_memory = 0; |
duke@435 | 3069 | size_t os::win32::_default_stack_size = 0; |
duke@435 | 3070 | |
duke@435 | 3071 | intx os::win32::_os_thread_limit = 0; |
duke@435 | 3072 | volatile intx os::win32::_os_thread_count = 0; |
duke@435 | 3073 | |
duke@435 | 3074 | bool os::win32::_is_nt = false; |
jmasa@824 | 3075 | bool os::win32::_is_windows_2003 = false; |
duke@435 | 3076 | |
duke@435 | 3077 | |
duke@435 | 3078 | void os::win32::initialize_system_info() { |
duke@435 | 3079 | SYSTEM_INFO si; |
duke@435 | 3080 | GetSystemInfo(&si); |
duke@435 | 3081 | _vm_page_size = si.dwPageSize; |
duke@435 | 3082 | _vm_allocation_granularity = si.dwAllocationGranularity; |
duke@435 | 3083 | _processor_type = si.dwProcessorType; |
duke@435 | 3084 | _processor_level = si.wProcessorLevel; |
duke@435 | 3085 | _processor_count = si.dwNumberOfProcessors; |
duke@435 | 3086 | |
duke@435 | 3087 | MEMORYSTATUS ms; |
duke@435 | 3088 | // also returns dwAvailPhys (free physical memory bytes), dwTotalVirtual, dwAvailVirtual, |
duke@435 | 3089 | // dwMemoryLoad (% of memory in use) |
duke@435 | 3090 | GlobalMemoryStatus(&ms); |
duke@435 | 3091 | _physical_memory = ms.dwTotalPhys; |
duke@435 | 3092 | |
duke@435 | 3093 | OSVERSIONINFO oi; |
duke@435 | 3094 | oi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); |
duke@435 | 3095 | GetVersionEx(&oi); |
duke@435 | 3096 | switch(oi.dwPlatformId) { |
duke@435 | 3097 | case VER_PLATFORM_WIN32_WINDOWS: _is_nt = false; break; |
jmasa@824 | 3098 | case VER_PLATFORM_WIN32_NT: |
jmasa@824 | 3099 | _is_nt = true; |
jmasa@824 | 3100 | { |
jmasa@824 | 3101 | int os_vers = oi.dwMajorVersion * 1000 + oi.dwMinorVersion; |
jmasa@824 | 3102 | if (os_vers == 5002) { |
jmasa@824 | 3103 | _is_windows_2003 = true; |
jmasa@824 | 3104 | } |
jmasa@824 | 3105 | } |
jmasa@824 | 3106 | break; |
duke@435 | 3107 | default: fatal("Unknown platform"); |
duke@435 | 3108 | } |
duke@435 | 3109 | |
duke@435 | 3110 | _default_stack_size = os::current_stack_size(); |
duke@435 | 3111 | assert(_default_stack_size > (size_t) _vm_page_size, "invalid stack size"); |
duke@435 | 3112 | assert((_default_stack_size & (_vm_page_size - 1)) == 0, |
duke@435 | 3113 | "stack size not a multiple of page size"); |
duke@435 | 3114 | |
duke@435 | 3115 | initialize_performance_counter(); |
duke@435 | 3116 | |
duke@435 | 3117 | // Win95/Win98 scheduler bug work-around. The Win95/98 scheduler is |
duke@435 | 3118 | // known to deadlock the system, if the VM issues to thread operations with |
duke@435 | 3119 | // a too high frequency, e.g., such as changing the priorities. |
duke@435 | 3120 | // The 6000 seems to work well - no deadlocks has been notices on the test |
duke@435 | 3121 | // programs that we have seen experience this problem. |
duke@435 | 3122 | if (!os::win32::is_nt()) { |
duke@435 | 3123 | StarvationMonitorInterval = 6000; |
duke@435 | 3124 | } |
duke@435 | 3125 | } |
duke@435 | 3126 | |
duke@435 | 3127 | |
duke@435 | 3128 | void os::win32::setmode_streams() { |
duke@435 | 3129 | _setmode(_fileno(stdin), _O_BINARY); |
duke@435 | 3130 | _setmode(_fileno(stdout), _O_BINARY); |
duke@435 | 3131 | _setmode(_fileno(stderr), _O_BINARY); |
duke@435 | 3132 | } |
duke@435 | 3133 | |
duke@435 | 3134 | |
duke@435 | 3135 | int os::message_box(const char* title, const char* message) { |
duke@435 | 3136 | int result = MessageBox(NULL, message, title, |
duke@435 | 3137 | MB_YESNO | MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFAULT_DESKTOP_ONLY); |
duke@435 | 3138 | return result == IDYES; |
duke@435 | 3139 | } |
duke@435 | 3140 | |
duke@435 | 3141 | int os::allocate_thread_local_storage() { |
duke@435 | 3142 | return TlsAlloc(); |
duke@435 | 3143 | } |
duke@435 | 3144 | |
duke@435 | 3145 | |
duke@435 | 3146 | void os::free_thread_local_storage(int index) { |
duke@435 | 3147 | TlsFree(index); |
duke@435 | 3148 | } |
duke@435 | 3149 | |
duke@435 | 3150 | |
duke@435 | 3151 | void os::thread_local_storage_at_put(int index, void* value) { |
duke@435 | 3152 | TlsSetValue(index, value); |
duke@435 | 3153 | assert(thread_local_storage_at(index) == value, "Just checking"); |
duke@435 | 3154 | } |
duke@435 | 3155 | |
duke@435 | 3156 | |
duke@435 | 3157 | void* os::thread_local_storage_at(int index) { |
duke@435 | 3158 | return TlsGetValue(index); |
duke@435 | 3159 | } |
duke@435 | 3160 | |
duke@435 | 3161 | |
duke@435 | 3162 | #ifndef PRODUCT |
duke@435 | 3163 | #ifndef _WIN64 |
duke@435 | 3164 | // Helpers to check whether NX protection is enabled |
duke@435 | 3165 | int nx_exception_filter(_EXCEPTION_POINTERS *pex) { |
duke@435 | 3166 | if (pex->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && |
duke@435 | 3167 | pex->ExceptionRecord->NumberParameters > 0 && |
duke@435 | 3168 | pex->ExceptionRecord->ExceptionInformation[0] == |
duke@435 | 3169 | EXCEPTION_INFO_EXEC_VIOLATION) { |
duke@435 | 3170 | return EXCEPTION_EXECUTE_HANDLER; |
duke@435 | 3171 | } |
duke@435 | 3172 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 3173 | } |
duke@435 | 3174 | |
duke@435 | 3175 | void nx_check_protection() { |
duke@435 | 3176 | // If NX is enabled we'll get an exception calling into code on the stack |
duke@435 | 3177 | char code[] = { (char)0xC3 }; // ret |
duke@435 | 3178 | void *code_ptr = (void *)code; |
duke@435 | 3179 | __try { |
duke@435 | 3180 | __asm call code_ptr |
duke@435 | 3181 | } __except(nx_exception_filter((_EXCEPTION_POINTERS*)_exception_info())) { |
duke@435 | 3182 | tty->print_raw_cr("NX protection detected."); |
duke@435 | 3183 | } |
duke@435 | 3184 | } |
duke@435 | 3185 | #endif // _WIN64 |
duke@435 | 3186 | #endif // PRODUCT |
duke@435 | 3187 | |
duke@435 | 3188 | // this is called _before_ the global arguments have been parsed |
duke@435 | 3189 | void os::init(void) { |
duke@435 | 3190 | _initial_pid = _getpid(); |
duke@435 | 3191 | |
duke@435 | 3192 | init_random(1234567); |
duke@435 | 3193 | |
duke@435 | 3194 | win32::initialize_system_info(); |
duke@435 | 3195 | win32::setmode_streams(); |
duke@435 | 3196 | init_page_sizes((size_t) win32::vm_page_size()); |
duke@435 | 3197 | |
duke@435 | 3198 | // For better scalability on MP systems (must be called after initialize_system_info) |
duke@435 | 3199 | #ifndef PRODUCT |
duke@435 | 3200 | if (is_MP()) { |
duke@435 | 3201 | NoYieldsInMicrolock = true; |
duke@435 | 3202 | } |
duke@435 | 3203 | #endif |
jmasa@824 | 3204 | // This may be overridden later when argument processing is done. |
jmasa@824 | 3205 | FLAG_SET_ERGO(bool, UseLargePagesIndividualAllocation, |
jmasa@824 | 3206 | os::win32::is_windows_2003()); |
jmasa@824 | 3207 | |
duke@435 | 3208 | // Initialize main_process and main_thread |
duke@435 | 3209 | main_process = GetCurrentProcess(); // Remember main_process is a pseudo handle |
jmasa@824 | 3210 | if (!DuplicateHandle(main_process, GetCurrentThread(), main_process, |
duke@435 | 3211 | &main_thread, THREAD_ALL_ACCESS, false, 0)) { |
duke@435 | 3212 | fatal("DuplicateHandle failed\n"); |
duke@435 | 3213 | } |
duke@435 | 3214 | main_thread_id = (int) GetCurrentThreadId(); |
duke@435 | 3215 | } |
duke@435 | 3216 | |
duke@435 | 3217 | // To install functions for atexit processing |
duke@435 | 3218 | extern "C" { |
duke@435 | 3219 | static void perfMemory_exit_helper() { |
duke@435 | 3220 | perfMemory_exit(); |
duke@435 | 3221 | } |
duke@435 | 3222 | } |
duke@435 | 3223 | |
duke@435 | 3224 | |
duke@435 | 3225 | // this is called _after_ the global arguments have been parsed |
duke@435 | 3226 | jint os::init_2(void) { |
duke@435 | 3227 | // Allocate a single page and mark it as readable for safepoint polling |
duke@435 | 3228 | address polling_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READONLY); |
duke@435 | 3229 | guarantee( polling_page != NULL, "Reserve Failed for polling page"); |
duke@435 | 3230 | |
duke@435 | 3231 | address return_page = (address)VirtualAlloc(polling_page, os::vm_page_size(), MEM_COMMIT, PAGE_READONLY); |
duke@435 | 3232 | guarantee( return_page != NULL, "Commit Failed for polling page"); |
duke@435 | 3233 | |
duke@435 | 3234 | os::set_polling_page( polling_page ); |
duke@435 | 3235 | |
duke@435 | 3236 | #ifndef PRODUCT |
duke@435 | 3237 | if( Verbose && PrintMiscellaneous ) |
duke@435 | 3238 | tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); |
duke@435 | 3239 | #endif |
duke@435 | 3240 | |
duke@435 | 3241 | if (!UseMembar) { |
duke@435 | 3242 | address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_EXECUTE_READWRITE); |
duke@435 | 3243 | guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page"); |
duke@435 | 3244 | |
duke@435 | 3245 | return_page = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_EXECUTE_READWRITE); |
duke@435 | 3246 | guarantee( return_page != NULL, "Commit Failed for memory serialize page"); |
duke@435 | 3247 | |
duke@435 | 3248 | os::set_memory_serialize_page( mem_serialize_page ); |
duke@435 | 3249 | |
duke@435 | 3250 | #ifndef PRODUCT |
duke@435 | 3251 | if(Verbose && PrintMiscellaneous) |
duke@435 | 3252 | tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); |
duke@435 | 3253 | #endif |
duke@435 | 3254 | } |
duke@435 | 3255 | |
duke@435 | 3256 | FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); |
duke@435 | 3257 | |
duke@435 | 3258 | // Setup Windows Exceptions |
duke@435 | 3259 | |
duke@435 | 3260 | // On Itanium systems, Structured Exception Handling does not |
duke@435 | 3261 | // work since stack frames must be walkable by the OS. Since |
duke@435 | 3262 | // much of our code is dynamically generated, and we do not have |
duke@435 | 3263 | // proper unwind .xdata sections, the system simply exits |
duke@435 | 3264 | // rather than delivering the exception. To work around |
duke@435 | 3265 | // this we use VectorExceptions instead. |
duke@435 | 3266 | #ifdef _WIN64 |
duke@435 | 3267 | if (UseVectoredExceptions) { |
duke@435 | 3268 | topLevelVectoredExceptionHandler = AddVectoredExceptionHandler( 1, topLevelExceptionFilter); |
duke@435 | 3269 | } |
duke@435 | 3270 | #endif |
duke@435 | 3271 | |
duke@435 | 3272 | // for debugging float code generation bugs |
duke@435 | 3273 | if (ForceFloatExceptions) { |
duke@435 | 3274 | #ifndef _WIN64 |
duke@435 | 3275 | static long fp_control_word = 0; |
duke@435 | 3276 | __asm { fstcw fp_control_word } |
duke@435 | 3277 | // see Intel PPro Manual, Vol. 2, p 7-16 |
duke@435 | 3278 | const long precision = 0x20; |
duke@435 | 3279 | const long underflow = 0x10; |
duke@435 | 3280 | const long overflow = 0x08; |
duke@435 | 3281 | const long zero_div = 0x04; |
duke@435 | 3282 | const long denorm = 0x02; |
duke@435 | 3283 | const long invalid = 0x01; |
duke@435 | 3284 | fp_control_word |= invalid; |
duke@435 | 3285 | __asm { fldcw fp_control_word } |
duke@435 | 3286 | #endif |
duke@435 | 3287 | } |
duke@435 | 3288 | |
duke@435 | 3289 | // Initialize HPI. |
duke@435 | 3290 | jint hpi_result = hpi::initialize(); |
duke@435 | 3291 | if (hpi_result != JNI_OK) { return hpi_result; } |
duke@435 | 3292 | |
duke@435 | 3293 | // If stack_commit_size is 0, windows will reserve the default size, |
duke@435 | 3294 | // but only commit a small portion of it. |
duke@435 | 3295 | size_t stack_commit_size = round_to(ThreadStackSize*K, os::vm_page_size()); |
duke@435 | 3296 | size_t default_reserve_size = os::win32::default_stack_size(); |
duke@435 | 3297 | size_t actual_reserve_size = stack_commit_size; |
duke@435 | 3298 | if (stack_commit_size < default_reserve_size) { |
duke@435 | 3299 | // If stack_commit_size == 0, we want this too |
duke@435 | 3300 | actual_reserve_size = default_reserve_size; |
duke@435 | 3301 | } |
duke@435 | 3302 | |
duke@435 | 3303 | JavaThread::set_stack_size_at_create(stack_commit_size); |
duke@435 | 3304 | |
duke@435 | 3305 | // Calculate theoretical max. size of Threads to guard gainst artifical |
duke@435 | 3306 | // out-of-memory situations, where all available address-space has been |
duke@435 | 3307 | // reserved by thread stacks. |
duke@435 | 3308 | assert(actual_reserve_size != 0, "Must have a stack"); |
duke@435 | 3309 | |
duke@435 | 3310 | // Calculate the thread limit when we should start doing Virtual Memory |
duke@435 | 3311 | // banging. Currently when the threads will have used all but 200Mb of space. |
duke@435 | 3312 | // |
duke@435 | 3313 | // TODO: consider performing a similar calculation for commit size instead |
duke@435 | 3314 | // as reserve size, since on a 64-bit platform we'll run into that more |
duke@435 | 3315 | // often than running out of virtual memory space. We can use the |
duke@435 | 3316 | // lower value of the two calculations as the os_thread_limit. |
coleenp@548 | 3317 | size_t max_address_space = ((size_t)1 << (BitsPerWord - 1)) - (200 * K * K); |
duke@435 | 3318 | win32::_os_thread_limit = (intx)(max_address_space / actual_reserve_size); |
duke@435 | 3319 | |
duke@435 | 3320 | // at exit methods are called in the reverse order of their registration. |
duke@435 | 3321 | // there is no limit to the number of functions registered. atexit does |
duke@435 | 3322 | // not set errno. |
duke@435 | 3323 | |
duke@435 | 3324 | if (PerfAllowAtExitRegistration) { |
duke@435 | 3325 | // only register atexit functions if PerfAllowAtExitRegistration is set. |
duke@435 | 3326 | // atexit functions can be delayed until process exit time, which |
duke@435 | 3327 | // can be problematic for embedded VM situations. Embedded VMs should |
duke@435 | 3328 | // call DestroyJavaVM() to assure that VM resources are released. |
duke@435 | 3329 | |
duke@435 | 3330 | // note: perfMemory_exit_helper atexit function may be removed in |
duke@435 | 3331 | // the future if the appropriate cleanup code can be added to the |
duke@435 | 3332 | // VM_Exit VMOperation's doit method. |
duke@435 | 3333 | if (atexit(perfMemory_exit_helper) != 0) { |
duke@435 | 3334 | warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
duke@435 | 3335 | } |
duke@435 | 3336 | } |
duke@435 | 3337 | |
duke@435 | 3338 | // initialize PSAPI or ToolHelp for fatal error handler |
duke@435 | 3339 | if (win32::is_nt()) _init_psapi(); |
duke@435 | 3340 | else _init_toolhelp(); |
duke@435 | 3341 | |
duke@435 | 3342 | #ifndef _WIN64 |
duke@435 | 3343 | // Print something if NX is enabled (win32 on AMD64) |
duke@435 | 3344 | NOT_PRODUCT(if (PrintMiscellaneous && Verbose) nx_check_protection()); |
duke@435 | 3345 | #endif |
duke@435 | 3346 | |
duke@435 | 3347 | // initialize thread priority policy |
duke@435 | 3348 | prio_init(); |
duke@435 | 3349 | |
duke@435 | 3350 | return JNI_OK; |
duke@435 | 3351 | } |
duke@435 | 3352 | |
duke@435 | 3353 | |
duke@435 | 3354 | // Mark the polling page as unreadable |
duke@435 | 3355 | void os::make_polling_page_unreadable(void) { |
duke@435 | 3356 | DWORD old_status; |
duke@435 | 3357 | if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_NOACCESS, &old_status) ) |
duke@435 | 3358 | fatal("Could not disable polling page"); |
duke@435 | 3359 | }; |
duke@435 | 3360 | |
duke@435 | 3361 | // Mark the polling page as readable |
duke@435 | 3362 | void os::make_polling_page_readable(void) { |
duke@435 | 3363 | DWORD old_status; |
duke@435 | 3364 | if( !VirtualProtect((char *)_polling_page, os::vm_page_size(), PAGE_READONLY, &old_status) ) |
duke@435 | 3365 | fatal("Could not enable polling page"); |
duke@435 | 3366 | }; |
duke@435 | 3367 | |
duke@435 | 3368 | |
duke@435 | 3369 | int os::stat(const char *path, struct stat *sbuf) { |
duke@435 | 3370 | char pathbuf[MAX_PATH]; |
duke@435 | 3371 | if (strlen(path) > MAX_PATH - 1) { |
duke@435 | 3372 | errno = ENAMETOOLONG; |
duke@435 | 3373 | return -1; |
duke@435 | 3374 | } |
duke@435 | 3375 | hpi::native_path(strcpy(pathbuf, path)); |
duke@435 | 3376 | int ret = ::stat(pathbuf, sbuf); |
duke@435 | 3377 | if (sbuf != NULL && UseUTCFileTimestamp) { |
duke@435 | 3378 | // Fix for 6539723. st_mtime returned from stat() is dependent on |
duke@435 | 3379 | // the system timezone and so can return different values for the |
duke@435 | 3380 | // same file if/when daylight savings time changes. This adjustment |
duke@435 | 3381 | // makes sure the same timestamp is returned regardless of the TZ. |
duke@435 | 3382 | // |
duke@435 | 3383 | // See: |
duke@435 | 3384 | // http://msdn.microsoft.com/library/ |
duke@435 | 3385 | // default.asp?url=/library/en-us/sysinfo/base/ |
duke@435 | 3386 | // time_zone_information_str.asp |
duke@435 | 3387 | // and |
duke@435 | 3388 | // http://msdn.microsoft.com/library/default.asp?url= |
duke@435 | 3389 | // /library/en-us/sysinfo/base/settimezoneinformation.asp |
duke@435 | 3390 | // |
duke@435 | 3391 | // NOTE: there is a insidious bug here: If the timezone is changed |
duke@435 | 3392 | // after the call to stat() but before 'GetTimeZoneInformation()', then |
duke@435 | 3393 | // the adjustment we do here will be wrong and we'll return the wrong |
duke@435 | 3394 | // value (which will likely end up creating an invalid class data |
duke@435 | 3395 | // archive). Absent a better API for this, or some time zone locking |
duke@435 | 3396 | // mechanism, we'll have to live with this risk. |
duke@435 | 3397 | TIME_ZONE_INFORMATION tz; |
duke@435 | 3398 | DWORD tzid = GetTimeZoneInformation(&tz); |
duke@435 | 3399 | int daylightBias = |
duke@435 | 3400 | (tzid == TIME_ZONE_ID_DAYLIGHT) ? tz.DaylightBias : tz.StandardBias; |
duke@435 | 3401 | sbuf->st_mtime += (tz.Bias + daylightBias) * 60; |
duke@435 | 3402 | } |
duke@435 | 3403 | return ret; |
duke@435 | 3404 | } |
duke@435 | 3405 | |
duke@435 | 3406 | |
duke@435 | 3407 | #define FT2INT64(ft) \ |
duke@435 | 3408 | ((jlong)((jlong)(ft).dwHighDateTime << 32 | (julong)(ft).dwLowDateTime)) |
duke@435 | 3409 | |
duke@435 | 3410 | |
duke@435 | 3411 | // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) |
duke@435 | 3412 | // are used by JVM M&M and JVMTI to get user+sys or user CPU time |
duke@435 | 3413 | // of a thread. |
duke@435 | 3414 | // |
duke@435 | 3415 | // current_thread_cpu_time() and thread_cpu_time(Thread*) returns |
duke@435 | 3416 | // the fast estimate available on the platform. |
duke@435 | 3417 | |
duke@435 | 3418 | // current_thread_cpu_time() is not optimized for Windows yet |
duke@435 | 3419 | jlong os::current_thread_cpu_time() { |
duke@435 | 3420 | // return user + sys since the cost is the same |
duke@435 | 3421 | return os::thread_cpu_time(Thread::current(), true /* user+sys */); |
duke@435 | 3422 | } |
duke@435 | 3423 | |
duke@435 | 3424 | jlong os::thread_cpu_time(Thread* thread) { |
duke@435 | 3425 | // consistent with what current_thread_cpu_time() returns. |
duke@435 | 3426 | return os::thread_cpu_time(thread, true /* user+sys */); |
duke@435 | 3427 | } |
duke@435 | 3428 | |
duke@435 | 3429 | jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { |
duke@435 | 3430 | return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); |
duke@435 | 3431 | } |
duke@435 | 3432 | |
duke@435 | 3433 | jlong os::thread_cpu_time(Thread* thread, bool user_sys_cpu_time) { |
duke@435 | 3434 | // This code is copy from clasic VM -> hpi::sysThreadCPUTime |
duke@435 | 3435 | // If this function changes, os::is_thread_cpu_time_supported() should too |
duke@435 | 3436 | if (os::win32::is_nt()) { |
duke@435 | 3437 | FILETIME CreationTime; |
duke@435 | 3438 | FILETIME ExitTime; |
duke@435 | 3439 | FILETIME KernelTime; |
duke@435 | 3440 | FILETIME UserTime; |
duke@435 | 3441 | |
duke@435 | 3442 | if ( GetThreadTimes(thread->osthread()->thread_handle(), |
duke@435 | 3443 | &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) |
duke@435 | 3444 | return -1; |
duke@435 | 3445 | else |
duke@435 | 3446 | if (user_sys_cpu_time) { |
duke@435 | 3447 | return (FT2INT64(UserTime) + FT2INT64(KernelTime)) * 100; |
duke@435 | 3448 | } else { |
duke@435 | 3449 | return FT2INT64(UserTime) * 100; |
duke@435 | 3450 | } |
duke@435 | 3451 | } else { |
duke@435 | 3452 | return (jlong) timeGetTime() * 1000000; |
duke@435 | 3453 | } |
duke@435 | 3454 | } |
duke@435 | 3455 | |
duke@435 | 3456 | void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
duke@435 | 3457 | info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits |
duke@435 | 3458 | info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time |
duke@435 | 3459 | info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time |
duke@435 | 3460 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
duke@435 | 3461 | } |
duke@435 | 3462 | |
duke@435 | 3463 | void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
duke@435 | 3464 | info_ptr->max_value = ALL_64_BITS; // the max value -- all 64 bits |
duke@435 | 3465 | info_ptr->may_skip_backward = false; // GetThreadTimes returns absolute time |
duke@435 | 3466 | info_ptr->may_skip_forward = false; // GetThreadTimes returns absolute time |
duke@435 | 3467 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
duke@435 | 3468 | } |
duke@435 | 3469 | |
duke@435 | 3470 | bool os::is_thread_cpu_time_supported() { |
duke@435 | 3471 | // see os::thread_cpu_time |
duke@435 | 3472 | if (os::win32::is_nt()) { |
duke@435 | 3473 | FILETIME CreationTime; |
duke@435 | 3474 | FILETIME ExitTime; |
duke@435 | 3475 | FILETIME KernelTime; |
duke@435 | 3476 | FILETIME UserTime; |
duke@435 | 3477 | |
duke@435 | 3478 | if ( GetThreadTimes(GetCurrentThread(), |
duke@435 | 3479 | &CreationTime, &ExitTime, &KernelTime, &UserTime) == 0) |
duke@435 | 3480 | return false; |
duke@435 | 3481 | else |
duke@435 | 3482 | return true; |
duke@435 | 3483 | } else { |
duke@435 | 3484 | return false; |
duke@435 | 3485 | } |
duke@435 | 3486 | } |
duke@435 | 3487 | |
duke@435 | 3488 | // Windows does't provide a loadavg primitive so this is stubbed out for now. |
duke@435 | 3489 | // It does have primitives (PDH API) to get CPU usage and run queue length. |
duke@435 | 3490 | // "\\Processor(_Total)\\% Processor Time", "\\System\\Processor Queue Length" |
duke@435 | 3491 | // If we wanted to implement loadavg on Windows, we have a few options: |
duke@435 | 3492 | // |
duke@435 | 3493 | // a) Query CPU usage and run queue length and "fake" an answer by |
duke@435 | 3494 | // returning the CPU usage if it's under 100%, and the run queue |
duke@435 | 3495 | // length otherwise. It turns out that querying is pretty slow |
duke@435 | 3496 | // on Windows, on the order of 200 microseconds on a fast machine. |
duke@435 | 3497 | // Note that on the Windows the CPU usage value is the % usage |
duke@435 | 3498 | // since the last time the API was called (and the first call |
duke@435 | 3499 | // returns 100%), so we'd have to deal with that as well. |
duke@435 | 3500 | // |
duke@435 | 3501 | // b) Sample the "fake" answer using a sampling thread and store |
duke@435 | 3502 | // the answer in a global variable. The call to loadavg would |
duke@435 | 3503 | // just return the value of the global, avoiding the slow query. |
duke@435 | 3504 | // |
duke@435 | 3505 | // c) Sample a better answer using exponential decay to smooth the |
duke@435 | 3506 | // value. This is basically the algorithm used by UNIX kernels. |
duke@435 | 3507 | // |
duke@435 | 3508 | // Note that sampling thread starvation could affect both (b) and (c). |
duke@435 | 3509 | int os::loadavg(double loadavg[], int nelem) { |
duke@435 | 3510 | return -1; |
duke@435 | 3511 | } |
duke@435 | 3512 | |
duke@435 | 3513 | |
duke@435 | 3514 | // DontYieldALot=false by default: dutifully perform all yields as requested by JVM_Yield() |
duke@435 | 3515 | bool os::dont_yield() { |
duke@435 | 3516 | return DontYieldALot; |
duke@435 | 3517 | } |
duke@435 | 3518 | |
duke@435 | 3519 | // Is a (classpath) directory empty? |
duke@435 | 3520 | bool os::dir_is_empty(const char* path) { |
duke@435 | 3521 | WIN32_FIND_DATA fd; |
duke@435 | 3522 | HANDLE f = FindFirstFile(path, &fd); |
duke@435 | 3523 | if (f == INVALID_HANDLE_VALUE) { |
duke@435 | 3524 | return true; |
duke@435 | 3525 | } |
duke@435 | 3526 | FindClose(f); |
duke@435 | 3527 | return false; |
duke@435 | 3528 | } |
duke@435 | 3529 | |
duke@435 | 3530 | // create binary file, rewriting existing file if required |
duke@435 | 3531 | int os::create_binary_file(const char* path, bool rewrite_existing) { |
duke@435 | 3532 | int oflags = _O_CREAT | _O_WRONLY | _O_BINARY; |
duke@435 | 3533 | if (!rewrite_existing) { |
duke@435 | 3534 | oflags |= _O_EXCL; |
duke@435 | 3535 | } |
duke@435 | 3536 | return ::open(path, oflags, _S_IREAD | _S_IWRITE); |
duke@435 | 3537 | } |
duke@435 | 3538 | |
duke@435 | 3539 | // return current position of file pointer |
duke@435 | 3540 | jlong os::current_file_offset(int fd) { |
duke@435 | 3541 | return (jlong)::_lseeki64(fd, (__int64)0L, SEEK_CUR); |
duke@435 | 3542 | } |
duke@435 | 3543 | |
duke@435 | 3544 | // move file pointer to the specified offset |
duke@435 | 3545 | jlong os::seek_to_file_offset(int fd, jlong offset) { |
duke@435 | 3546 | return (jlong)::_lseeki64(fd, (__int64)offset, SEEK_SET); |
duke@435 | 3547 | } |
duke@435 | 3548 | |
duke@435 | 3549 | |
duke@435 | 3550 | // Map a block of memory. |
duke@435 | 3551 | char* os::map_memory(int fd, const char* file_name, size_t file_offset, |
duke@435 | 3552 | char *addr, size_t bytes, bool read_only, |
duke@435 | 3553 | bool allow_exec) { |
duke@435 | 3554 | HANDLE hFile; |
duke@435 | 3555 | char* base; |
duke@435 | 3556 | |
duke@435 | 3557 | hFile = CreateFile(file_name, GENERIC_READ, FILE_SHARE_READ, NULL, |
duke@435 | 3558 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
duke@435 | 3559 | if (hFile == NULL) { |
duke@435 | 3560 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3561 | DWORD err = GetLastError(); |
duke@435 | 3562 | tty->print_cr("CreateFile() failed: GetLastError->%ld."); |
duke@435 | 3563 | } |
duke@435 | 3564 | return NULL; |
duke@435 | 3565 | } |
duke@435 | 3566 | |
duke@435 | 3567 | if (allow_exec) { |
duke@435 | 3568 | // CreateFileMapping/MapViewOfFileEx can't map executable memory |
duke@435 | 3569 | // unless it comes from a PE image (which the shared archive is not.) |
duke@435 | 3570 | // Even VirtualProtect refuses to give execute access to mapped memory |
duke@435 | 3571 | // that was not previously executable. |
duke@435 | 3572 | // |
duke@435 | 3573 | // Instead, stick the executable region in anonymous memory. Yuck. |
duke@435 | 3574 | // Penalty is that ~4 pages will not be shareable - in the future |
duke@435 | 3575 | // we might consider DLLizing the shared archive with a proper PE |
duke@435 | 3576 | // header so that mapping executable + sharing is possible. |
duke@435 | 3577 | |
duke@435 | 3578 | base = (char*) VirtualAlloc(addr, bytes, MEM_COMMIT | MEM_RESERVE, |
duke@435 | 3579 | PAGE_READWRITE); |
duke@435 | 3580 | if (base == NULL) { |
duke@435 | 3581 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3582 | DWORD err = GetLastError(); |
duke@435 | 3583 | tty->print_cr("VirtualAlloc() failed: GetLastError->%ld.", err); |
duke@435 | 3584 | } |
duke@435 | 3585 | CloseHandle(hFile); |
duke@435 | 3586 | return NULL; |
duke@435 | 3587 | } |
duke@435 | 3588 | |
duke@435 | 3589 | DWORD bytes_read; |
duke@435 | 3590 | OVERLAPPED overlapped; |
duke@435 | 3591 | overlapped.Offset = (DWORD)file_offset; |
duke@435 | 3592 | overlapped.OffsetHigh = 0; |
duke@435 | 3593 | overlapped.hEvent = NULL; |
duke@435 | 3594 | // ReadFile guarantees that if the return value is true, the requested |
duke@435 | 3595 | // number of bytes were read before returning. |
duke@435 | 3596 | bool res = ReadFile(hFile, base, (DWORD)bytes, &bytes_read, &overlapped) != 0; |
duke@435 | 3597 | if (!res) { |
duke@435 | 3598 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3599 | DWORD err = GetLastError(); |
duke@435 | 3600 | tty->print_cr("ReadFile() failed: GetLastError->%ld.", err); |
duke@435 | 3601 | } |
duke@435 | 3602 | release_memory(base, bytes); |
duke@435 | 3603 | CloseHandle(hFile); |
duke@435 | 3604 | return NULL; |
duke@435 | 3605 | } |
duke@435 | 3606 | } else { |
duke@435 | 3607 | HANDLE hMap = CreateFileMapping(hFile, NULL, PAGE_WRITECOPY, 0, 0, |
duke@435 | 3608 | NULL /*file_name*/); |
duke@435 | 3609 | if (hMap == NULL) { |
duke@435 | 3610 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3611 | DWORD err = GetLastError(); |
duke@435 | 3612 | tty->print_cr("CreateFileMapping() failed: GetLastError->%ld."); |
duke@435 | 3613 | } |
duke@435 | 3614 | CloseHandle(hFile); |
duke@435 | 3615 | return NULL; |
duke@435 | 3616 | } |
duke@435 | 3617 | |
duke@435 | 3618 | DWORD access = read_only ? FILE_MAP_READ : FILE_MAP_COPY; |
duke@435 | 3619 | base = (char*)MapViewOfFileEx(hMap, access, 0, (DWORD)file_offset, |
duke@435 | 3620 | (DWORD)bytes, addr); |
duke@435 | 3621 | if (base == NULL) { |
duke@435 | 3622 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3623 | DWORD err = GetLastError(); |
duke@435 | 3624 | tty->print_cr("MapViewOfFileEx() failed: GetLastError->%ld.", err); |
duke@435 | 3625 | } |
duke@435 | 3626 | CloseHandle(hMap); |
duke@435 | 3627 | CloseHandle(hFile); |
duke@435 | 3628 | return NULL; |
duke@435 | 3629 | } |
duke@435 | 3630 | |
duke@435 | 3631 | if (CloseHandle(hMap) == 0) { |
duke@435 | 3632 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3633 | DWORD err = GetLastError(); |
duke@435 | 3634 | tty->print_cr("CloseHandle(hMap) failed: GetLastError->%ld.", err); |
duke@435 | 3635 | } |
duke@435 | 3636 | CloseHandle(hFile); |
duke@435 | 3637 | return base; |
duke@435 | 3638 | } |
duke@435 | 3639 | } |
duke@435 | 3640 | |
duke@435 | 3641 | if (allow_exec) { |
duke@435 | 3642 | DWORD old_protect; |
duke@435 | 3643 | DWORD exec_access = read_only ? PAGE_EXECUTE_READ : PAGE_EXECUTE_READWRITE; |
duke@435 | 3644 | bool res = VirtualProtect(base, bytes, exec_access, &old_protect) != 0; |
duke@435 | 3645 | |
duke@435 | 3646 | if (!res) { |
duke@435 | 3647 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3648 | DWORD err = GetLastError(); |
duke@435 | 3649 | tty->print_cr("VirtualProtect() failed: GetLastError->%ld.", err); |
duke@435 | 3650 | } |
duke@435 | 3651 | // Don't consider this a hard error, on IA32 even if the |
duke@435 | 3652 | // VirtualProtect fails, we should still be able to execute |
duke@435 | 3653 | CloseHandle(hFile); |
duke@435 | 3654 | return base; |
duke@435 | 3655 | } |
duke@435 | 3656 | } |
duke@435 | 3657 | |
duke@435 | 3658 | if (CloseHandle(hFile) == 0) { |
duke@435 | 3659 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3660 | DWORD err = GetLastError(); |
duke@435 | 3661 | tty->print_cr("CloseHandle(hFile) failed: GetLastError->%ld.", err); |
duke@435 | 3662 | } |
duke@435 | 3663 | return base; |
duke@435 | 3664 | } |
duke@435 | 3665 | |
duke@435 | 3666 | return base; |
duke@435 | 3667 | } |
duke@435 | 3668 | |
duke@435 | 3669 | |
duke@435 | 3670 | // Remap a block of memory. |
duke@435 | 3671 | char* os::remap_memory(int fd, const char* file_name, size_t file_offset, |
duke@435 | 3672 | char *addr, size_t bytes, bool read_only, |
duke@435 | 3673 | bool allow_exec) { |
duke@435 | 3674 | // This OS does not allow existing memory maps to be remapped so we |
duke@435 | 3675 | // have to unmap the memory before we remap it. |
duke@435 | 3676 | if (!os::unmap_memory(addr, bytes)) { |
duke@435 | 3677 | return NULL; |
duke@435 | 3678 | } |
duke@435 | 3679 | |
duke@435 | 3680 | // There is a very small theoretical window between the unmap_memory() |
duke@435 | 3681 | // call above and the map_memory() call below where a thread in native |
duke@435 | 3682 | // code may be able to access an address that is no longer mapped. |
duke@435 | 3683 | |
duke@435 | 3684 | return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, |
duke@435 | 3685 | allow_exec); |
duke@435 | 3686 | } |
duke@435 | 3687 | |
duke@435 | 3688 | |
duke@435 | 3689 | // Unmap a block of memory. |
duke@435 | 3690 | // Returns true=success, otherwise false. |
duke@435 | 3691 | |
duke@435 | 3692 | bool os::unmap_memory(char* addr, size_t bytes) { |
duke@435 | 3693 | BOOL result = UnmapViewOfFile(addr); |
duke@435 | 3694 | if (result == 0) { |
duke@435 | 3695 | if (PrintMiscellaneous && Verbose) { |
duke@435 | 3696 | DWORD err = GetLastError(); |
duke@435 | 3697 | tty->print_cr("UnmapViewOfFile() failed: GetLastError->%ld.", err); |
duke@435 | 3698 | } |
duke@435 | 3699 | return false; |
duke@435 | 3700 | } |
duke@435 | 3701 | return true; |
duke@435 | 3702 | } |
duke@435 | 3703 | |
duke@435 | 3704 | void os::pause() { |
duke@435 | 3705 | char filename[MAX_PATH]; |
duke@435 | 3706 | if (PauseAtStartupFile && PauseAtStartupFile[0]) { |
duke@435 | 3707 | jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); |
duke@435 | 3708 | } else { |
duke@435 | 3709 | jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); |
duke@435 | 3710 | } |
duke@435 | 3711 | |
duke@435 | 3712 | int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
duke@435 | 3713 | if (fd != -1) { |
duke@435 | 3714 | struct stat buf; |
duke@435 | 3715 | close(fd); |
duke@435 | 3716 | while (::stat(filename, &buf) == 0) { |
duke@435 | 3717 | Sleep(100); |
duke@435 | 3718 | } |
duke@435 | 3719 | } else { |
duke@435 | 3720 | jio_fprintf(stderr, |
duke@435 | 3721 | "Could not open pause file '%s', continuing immediately.\n", filename); |
duke@435 | 3722 | } |
duke@435 | 3723 | } |
duke@435 | 3724 | |
duke@435 | 3725 | // An Event wraps a win32 "CreateEvent" kernel handle. |
duke@435 | 3726 | // |
duke@435 | 3727 | // We have a number of choices regarding "CreateEvent" win32 handle leakage: |
duke@435 | 3728 | // |
duke@435 | 3729 | // 1: When a thread dies return the Event to the EventFreeList, clear the ParkHandle |
duke@435 | 3730 | // field, and call CloseHandle() on the win32 event handle. Unpark() would |
duke@435 | 3731 | // need to be modified to tolerate finding a NULL (invalid) win32 event handle. |
duke@435 | 3732 | // In addition, an unpark() operation might fetch the handle field, but the |
duke@435 | 3733 | // event could recycle between the fetch and the SetEvent() operation. |
duke@435 | 3734 | // SetEvent() would either fail because the handle was invalid, or inadvertently work, |
duke@435 | 3735 | // as the win32 handle value had been recycled. In an ideal world calling SetEvent() |
duke@435 | 3736 | // on an stale but recycled handle would be harmless, but in practice this might |
duke@435 | 3737 | // confuse other non-Sun code, so it's not a viable approach. |
duke@435 | 3738 | // |
duke@435 | 3739 | // 2: Once a win32 event handle is associated with an Event, it remains associated |
duke@435 | 3740 | // with the Event. The event handle is never closed. This could be construed |
duke@435 | 3741 | // as handle leakage, but only up to the maximum # of threads that have been extant |
duke@435 | 3742 | // at any one time. This shouldn't be an issue, as windows platforms typically |
duke@435 | 3743 | // permit a process to have hundreds of thousands of open handles. |
duke@435 | 3744 | // |
duke@435 | 3745 | // 3: Same as (1), but periodically, at stop-the-world time, rundown the EventFreeList |
duke@435 | 3746 | // and release unused handles. |
duke@435 | 3747 | // |
duke@435 | 3748 | // 4: Add a CRITICAL_SECTION to the Event to protect LD+SetEvent from LD;ST(null);CloseHandle. |
duke@435 | 3749 | // It's not clear, however, that we wouldn't be trading one type of leak for another. |
duke@435 | 3750 | // |
duke@435 | 3751 | // 5. Use an RCU-like mechanism (Read-Copy Update). |
duke@435 | 3752 | // Or perhaps something similar to Maged Michael's "Hazard pointers". |
duke@435 | 3753 | // |
duke@435 | 3754 | // We use (2). |
duke@435 | 3755 | // |
duke@435 | 3756 | // TODO-FIXME: |
duke@435 | 3757 | // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the objectmonitor implementation. |
duke@435 | 3758 | // 2. Consider wrapping the WaitForSingleObject(Ex) calls in SEH try/finally blocks |
duke@435 | 3759 | // to recover from (or at least detect) the dreaded Windows 841176 bug. |
duke@435 | 3760 | // 3. Collapse the interrupt_event, the JSR166 parker event, and the objectmonitor ParkEvent |
duke@435 | 3761 | // into a single win32 CreateEvent() handle. |
duke@435 | 3762 | // |
duke@435 | 3763 | // _Event transitions in park() |
duke@435 | 3764 | // -1 => -1 : illegal |
duke@435 | 3765 | // 1 => 0 : pass - return immediately |
duke@435 | 3766 | // 0 => -1 : block |
duke@435 | 3767 | // |
duke@435 | 3768 | // _Event serves as a restricted-range semaphore : |
duke@435 | 3769 | // -1 : thread is blocked |
duke@435 | 3770 | // 0 : neutral - thread is running or ready |
duke@435 | 3771 | // 1 : signaled - thread is running or ready |
duke@435 | 3772 | // |
duke@435 | 3773 | // Another possible encoding of _Event would be |
duke@435 | 3774 | // with explicit "PARKED" and "SIGNALED" bits. |
duke@435 | 3775 | |
duke@435 | 3776 | int os::PlatformEvent::park (jlong Millis) { |
duke@435 | 3777 | guarantee (_ParkHandle != NULL , "Invariant") ; |
duke@435 | 3778 | guarantee (Millis > 0 , "Invariant") ; |
duke@435 | 3779 | int v ; |
duke@435 | 3780 | |
duke@435 | 3781 | // CONSIDER: defer assigning a CreateEvent() handle to the Event until |
duke@435 | 3782 | // the initial park() operation. |
duke@435 | 3783 | |
duke@435 | 3784 | for (;;) { |
duke@435 | 3785 | v = _Event ; |
duke@435 | 3786 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; |
duke@435 | 3787 | } |
duke@435 | 3788 | guarantee ((v == 0) || (v == 1), "invariant") ; |
duke@435 | 3789 | if (v != 0) return OS_OK ; |
duke@435 | 3790 | |
duke@435 | 3791 | // Do this the hard way by blocking ... |
duke@435 | 3792 | // TODO: consider a brief spin here, gated on the success of recent |
duke@435 | 3793 | // spin attempts by this thread. |
duke@435 | 3794 | // |
duke@435 | 3795 | // We decompose long timeouts into series of shorter timed waits. |
duke@435 | 3796 | // Evidently large timo values passed in WaitForSingleObject() are problematic on some |
duke@435 | 3797 | // versions of Windows. See EventWait() for details. This may be superstition. Or not. |
duke@435 | 3798 | // We trust the WAIT_TIMEOUT indication and don't track the elapsed wait time |
duke@435 | 3799 | // with os::javaTimeNanos(). Furthermore, we assume that spurious returns from |
duke@435 | 3800 | // ::WaitForSingleObject() caused by latent ::setEvent() operations will tend |
duke@435 | 3801 | // to happen early in the wait interval. Specifically, after a spurious wakeup (rv == |
duke@435 | 3802 | // WAIT_OBJECT_0 but _Event is still < 0) we don't bother to recompute Millis to compensate |
duke@435 | 3803 | // for the already waited time. This policy does not admit any new outcomes. |
duke@435 | 3804 | // In the future, however, we might want to track the accumulated wait time and |
duke@435 | 3805 | // adjust Millis accordingly if we encounter a spurious wakeup. |
duke@435 | 3806 | |
duke@435 | 3807 | const int MAXTIMEOUT = 0x10000000 ; |
duke@435 | 3808 | DWORD rv = WAIT_TIMEOUT ; |
duke@435 | 3809 | while (_Event < 0 && Millis > 0) { |
duke@435 | 3810 | DWORD prd = Millis ; // set prd = MAX (Millis, MAXTIMEOUT) |
duke@435 | 3811 | if (Millis > MAXTIMEOUT) { |
duke@435 | 3812 | prd = MAXTIMEOUT ; |
duke@435 | 3813 | } |
duke@435 | 3814 | rv = ::WaitForSingleObject (_ParkHandle, prd) ; |
duke@435 | 3815 | assert (rv == WAIT_OBJECT_0 || rv == WAIT_TIMEOUT, "WaitForSingleObject failed") ; |
duke@435 | 3816 | if (rv == WAIT_TIMEOUT) { |
duke@435 | 3817 | Millis -= prd ; |
duke@435 | 3818 | } |
duke@435 | 3819 | } |
duke@435 | 3820 | v = _Event ; |
duke@435 | 3821 | _Event = 0 ; |
duke@435 | 3822 | OrderAccess::fence() ; |
duke@435 | 3823 | // If we encounter a nearly simultanous timeout expiry and unpark() |
duke@435 | 3824 | // we return OS_OK indicating we awoke via unpark(). |
duke@435 | 3825 | // Implementor's license -- returning OS_TIMEOUT would be equally valid, however. |
duke@435 | 3826 | return (v >= 0) ? OS_OK : OS_TIMEOUT ; |
duke@435 | 3827 | } |
duke@435 | 3828 | |
duke@435 | 3829 | void os::PlatformEvent::park () { |
duke@435 | 3830 | guarantee (_ParkHandle != NULL, "Invariant") ; |
duke@435 | 3831 | // Invariant: Only the thread associated with the Event/PlatformEvent |
duke@435 | 3832 | // may call park(). |
duke@435 | 3833 | int v ; |
duke@435 | 3834 | for (;;) { |
duke@435 | 3835 | v = _Event ; |
duke@435 | 3836 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; |
duke@435 | 3837 | } |
duke@435 | 3838 | guarantee ((v == 0) || (v == 1), "invariant") ; |
duke@435 | 3839 | if (v != 0) return ; |
duke@435 | 3840 | |
duke@435 | 3841 | // Do this the hard way by blocking ... |
duke@435 | 3842 | // TODO: consider a brief spin here, gated on the success of recent |
duke@435 | 3843 | // spin attempts by this thread. |
duke@435 | 3844 | while (_Event < 0) { |
duke@435 | 3845 | DWORD rv = ::WaitForSingleObject (_ParkHandle, INFINITE) ; |
duke@435 | 3846 | assert (rv == WAIT_OBJECT_0, "WaitForSingleObject failed") ; |
duke@435 | 3847 | } |
duke@435 | 3848 | |
duke@435 | 3849 | // Usually we'll find _Event == 0 at this point, but as |
duke@435 | 3850 | // an optional optimization we clear it, just in case can |
duke@435 | 3851 | // multiple unpark() operations drove _Event up to 1. |
duke@435 | 3852 | _Event = 0 ; |
duke@435 | 3853 | OrderAccess::fence() ; |
duke@435 | 3854 | guarantee (_Event >= 0, "invariant") ; |
duke@435 | 3855 | } |
duke@435 | 3856 | |
duke@435 | 3857 | void os::PlatformEvent::unpark() { |
duke@435 | 3858 | guarantee (_ParkHandle != NULL, "Invariant") ; |
duke@435 | 3859 | int v ; |
duke@435 | 3860 | for (;;) { |
duke@435 | 3861 | v = _Event ; // Increment _Event if it's < 1. |
duke@435 | 3862 | if (v > 0) { |
duke@435 | 3863 | // If it's already signaled just return. |
duke@435 | 3864 | // The LD of _Event could have reordered or be satisfied |
duke@435 | 3865 | // by a read-aside from this processor's write buffer. |
duke@435 | 3866 | // To avoid problems execute a barrier and then |
duke@435 | 3867 | // ratify the value. A degenerate CAS() would also work. |
duke@435 | 3868 | // Viz., CAS (v+0, &_Event, v) == v). |
duke@435 | 3869 | OrderAccess::fence() ; |
duke@435 | 3870 | if (_Event == v) return ; |
duke@435 | 3871 | continue ; |
duke@435 | 3872 | } |
duke@435 | 3873 | if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; |
duke@435 | 3874 | } |
duke@435 | 3875 | if (v < 0) { |
duke@435 | 3876 | ::SetEvent (_ParkHandle) ; |
duke@435 | 3877 | } |
duke@435 | 3878 | } |
duke@435 | 3879 | |
duke@435 | 3880 | |
duke@435 | 3881 | // JSR166 |
duke@435 | 3882 | // ------------------------------------------------------- |
duke@435 | 3883 | |
duke@435 | 3884 | /* |
duke@435 | 3885 | * The Windows implementation of Park is very straightforward: Basic |
duke@435 | 3886 | * operations on Win32 Events turn out to have the right semantics to |
duke@435 | 3887 | * use them directly. We opportunistically resuse the event inherited |
duke@435 | 3888 | * from Monitor. |
duke@435 | 3889 | */ |
duke@435 | 3890 | |
duke@435 | 3891 | |
duke@435 | 3892 | void Parker::park(bool isAbsolute, jlong time) { |
duke@435 | 3893 | guarantee (_ParkEvent != NULL, "invariant") ; |
duke@435 | 3894 | // First, demultiplex/decode time arguments |
duke@435 | 3895 | if (time < 0) { // don't wait |
duke@435 | 3896 | return; |
duke@435 | 3897 | } |
duke@435 | 3898 | else if (time == 0) { |
duke@435 | 3899 | time = INFINITE; |
duke@435 | 3900 | } |
duke@435 | 3901 | else if (isAbsolute) { |
duke@435 | 3902 | time -= os::javaTimeMillis(); // convert to relative time |
duke@435 | 3903 | if (time <= 0) // already elapsed |
duke@435 | 3904 | return; |
duke@435 | 3905 | } |
duke@435 | 3906 | else { // relative |
duke@435 | 3907 | time /= 1000000; // Must coarsen from nanos to millis |
duke@435 | 3908 | if (time == 0) // Wait for the minimal time unit if zero |
duke@435 | 3909 | time = 1; |
duke@435 | 3910 | } |
duke@435 | 3911 | |
duke@435 | 3912 | JavaThread* thread = (JavaThread*)(Thread::current()); |
duke@435 | 3913 | assert(thread->is_Java_thread(), "Must be JavaThread"); |
duke@435 | 3914 | JavaThread *jt = (JavaThread *)thread; |
duke@435 | 3915 | |
duke@435 | 3916 | // Don't wait if interrupted or already triggered |
duke@435 | 3917 | if (Thread::is_interrupted(thread, false) || |
duke@435 | 3918 | WaitForSingleObject(_ParkEvent, 0) == WAIT_OBJECT_0) { |
duke@435 | 3919 | ResetEvent(_ParkEvent); |
duke@435 | 3920 | return; |
duke@435 | 3921 | } |
duke@435 | 3922 | else { |
duke@435 | 3923 | ThreadBlockInVM tbivm(jt); |
duke@435 | 3924 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
duke@435 | 3925 | jt->set_suspend_equivalent(); |
duke@435 | 3926 | |
duke@435 | 3927 | WaitForSingleObject(_ParkEvent, time); |
duke@435 | 3928 | ResetEvent(_ParkEvent); |
duke@435 | 3929 | |
duke@435 | 3930 | // If externally suspended while waiting, re-suspend |
duke@435 | 3931 | if (jt->handle_special_suspend_equivalent_condition()) { |
duke@435 | 3932 | jt->java_suspend_self(); |
duke@435 | 3933 | } |
duke@435 | 3934 | } |
duke@435 | 3935 | } |
duke@435 | 3936 | |
duke@435 | 3937 | void Parker::unpark() { |
duke@435 | 3938 | guarantee (_ParkEvent != NULL, "invariant") ; |
duke@435 | 3939 | SetEvent(_ParkEvent); |
duke@435 | 3940 | } |
duke@435 | 3941 | |
duke@435 | 3942 | // Run the specified command in a separate process. Return its exit value, |
duke@435 | 3943 | // or -1 on failure (e.g. can't create a new process). |
duke@435 | 3944 | int os::fork_and_exec(char* cmd) { |
duke@435 | 3945 | STARTUPINFO si; |
duke@435 | 3946 | PROCESS_INFORMATION pi; |
duke@435 | 3947 | |
duke@435 | 3948 | memset(&si, 0, sizeof(si)); |
duke@435 | 3949 | si.cb = sizeof(si); |
duke@435 | 3950 | memset(&pi, 0, sizeof(pi)); |
duke@435 | 3951 | BOOL rslt = CreateProcess(NULL, // executable name - use command line |
duke@435 | 3952 | cmd, // command line |
duke@435 | 3953 | NULL, // process security attribute |
duke@435 | 3954 | NULL, // thread security attribute |
duke@435 | 3955 | TRUE, // inherits system handles |
duke@435 | 3956 | 0, // no creation flags |
duke@435 | 3957 | NULL, // use parent's environment block |
duke@435 | 3958 | NULL, // use parent's starting directory |
duke@435 | 3959 | &si, // (in) startup information |
duke@435 | 3960 | &pi); // (out) process information |
duke@435 | 3961 | |
duke@435 | 3962 | if (rslt) { |
duke@435 | 3963 | // Wait until child process exits. |
duke@435 | 3964 | WaitForSingleObject(pi.hProcess, INFINITE); |
duke@435 | 3965 | |
duke@435 | 3966 | DWORD exit_code; |
duke@435 | 3967 | GetExitCodeProcess(pi.hProcess, &exit_code); |
duke@435 | 3968 | |
duke@435 | 3969 | // Close process and thread handles. |
duke@435 | 3970 | CloseHandle(pi.hProcess); |
duke@435 | 3971 | CloseHandle(pi.hThread); |
duke@435 | 3972 | |
duke@435 | 3973 | return (int)exit_code; |
duke@435 | 3974 | } else { |
duke@435 | 3975 | return -1; |
duke@435 | 3976 | } |
duke@435 | 3977 | } |
duke@435 | 3978 | |
duke@435 | 3979 | //-------------------------------------------------------------------------------------------------- |
duke@435 | 3980 | // Non-product code |
duke@435 | 3981 | |
duke@435 | 3982 | static int mallocDebugIntervalCounter = 0; |
duke@435 | 3983 | static int mallocDebugCounter = 0; |
duke@435 | 3984 | bool os::check_heap(bool force) { |
duke@435 | 3985 | if (++mallocDebugCounter < MallocVerifyStart && !force) return true; |
duke@435 | 3986 | if (++mallocDebugIntervalCounter >= MallocVerifyInterval || force) { |
duke@435 | 3987 | // Note: HeapValidate executes two hardware breakpoints when it finds something |
duke@435 | 3988 | // wrong; at these points, eax contains the address of the offending block (I think). |
duke@435 | 3989 | // To get to the exlicit error message(s) below, just continue twice. |
duke@435 | 3990 | HANDLE heap = GetProcessHeap(); |
duke@435 | 3991 | { HeapLock(heap); |
duke@435 | 3992 | PROCESS_HEAP_ENTRY phe; |
duke@435 | 3993 | phe.lpData = NULL; |
duke@435 | 3994 | while (HeapWalk(heap, &phe) != 0) { |
duke@435 | 3995 | if ((phe.wFlags & PROCESS_HEAP_ENTRY_BUSY) && |
duke@435 | 3996 | !HeapValidate(heap, 0, phe.lpData)) { |
duke@435 | 3997 | tty->print_cr("C heap has been corrupted (time: %d allocations)", mallocDebugCounter); |
duke@435 | 3998 | tty->print_cr("corrupted block near address %#x, length %d", phe.lpData, phe.cbData); |
duke@435 | 3999 | fatal("corrupted C heap"); |
duke@435 | 4000 | } |
duke@435 | 4001 | } |
duke@435 | 4002 | int err = GetLastError(); |
duke@435 | 4003 | if (err != ERROR_NO_MORE_ITEMS && err != ERROR_CALL_NOT_IMPLEMENTED) { |
duke@435 | 4004 | fatal1("heap walk aborted with error %d", err); |
duke@435 | 4005 | } |
duke@435 | 4006 | HeapUnlock(heap); |
duke@435 | 4007 | } |
duke@435 | 4008 | mallocDebugIntervalCounter = 0; |
duke@435 | 4009 | } |
duke@435 | 4010 | return true; |
duke@435 | 4011 | } |
duke@435 | 4012 | |
duke@435 | 4013 | |
duke@435 | 4014 | #ifndef PRODUCT |
duke@435 | 4015 | bool os::find(address addr) { |
duke@435 | 4016 | // Nothing yet |
duke@435 | 4017 | return false; |
duke@435 | 4018 | } |
duke@435 | 4019 | #endif |
duke@435 | 4020 | |
duke@435 | 4021 | LONG WINAPI os::win32::serialize_fault_filter(struct _EXCEPTION_POINTERS* e) { |
duke@435 | 4022 | DWORD exception_code = e->ExceptionRecord->ExceptionCode; |
duke@435 | 4023 | |
duke@435 | 4024 | if ( exception_code == EXCEPTION_ACCESS_VIOLATION ) { |
duke@435 | 4025 | JavaThread* thread = (JavaThread*)ThreadLocalStorage::get_thread_slow(); |
duke@435 | 4026 | PEXCEPTION_RECORD exceptionRecord = e->ExceptionRecord; |
duke@435 | 4027 | address addr = (address) exceptionRecord->ExceptionInformation[1]; |
duke@435 | 4028 | |
duke@435 | 4029 | if (os::is_memory_serialize_page(thread, addr)) |
duke@435 | 4030 | return EXCEPTION_CONTINUE_EXECUTION; |
duke@435 | 4031 | } |
duke@435 | 4032 | |
duke@435 | 4033 | return EXCEPTION_CONTINUE_SEARCH; |
duke@435 | 4034 | } |
duke@435 | 4035 | |
duke@435 | 4036 | static int getLastErrorString(char *buf, size_t len) |
duke@435 | 4037 | { |
duke@435 | 4038 | long errval; |
duke@435 | 4039 | |
duke@435 | 4040 | if ((errval = GetLastError()) != 0) |
duke@435 | 4041 | { |
duke@435 | 4042 | /* DOS error */ |
duke@435 | 4043 | size_t n = (size_t)FormatMessage( |
duke@435 | 4044 | FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS, |
duke@435 | 4045 | NULL, |
duke@435 | 4046 | errval, |
duke@435 | 4047 | 0, |
duke@435 | 4048 | buf, |
duke@435 | 4049 | (DWORD)len, |
duke@435 | 4050 | NULL); |
duke@435 | 4051 | if (n > 3) { |
duke@435 | 4052 | /* Drop final '.', CR, LF */ |
duke@435 | 4053 | if (buf[n - 1] == '\n') n--; |
duke@435 | 4054 | if (buf[n - 1] == '\r') n--; |
duke@435 | 4055 | if (buf[n - 1] == '.') n--; |
duke@435 | 4056 | buf[n] = '\0'; |
duke@435 | 4057 | } |
duke@435 | 4058 | return (int)n; |
duke@435 | 4059 | } |
duke@435 | 4060 | |
duke@435 | 4061 | if (errno != 0) |
duke@435 | 4062 | { |
duke@435 | 4063 | /* C runtime error that has no corresponding DOS error code */ |
duke@435 | 4064 | const char *s = strerror(errno); |
duke@435 | 4065 | size_t n = strlen(s); |
duke@435 | 4066 | if (n >= len) n = len - 1; |
duke@435 | 4067 | strncpy(buf, s, n); |
duke@435 | 4068 | buf[n] = '\0'; |
duke@435 | 4069 | return (int)n; |
duke@435 | 4070 | } |
duke@435 | 4071 | return 0; |
duke@435 | 4072 | } |