Mercurial > hg > truffle
annotate src/os_cpu/windows_x86/vm/os_windows_x86.cpp @ 6842:b9a9ed0f8eeb
7197424: update copyright year to match last edit in jdk8 hotspot repository
Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp
| author | mikael |
|---|---|
| date | Tue, 09 Oct 2012 10:09:34 -0700 |
| parents | bf2edd3c9b0f |
| children | 5ec0c42da025 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 // no precompiled headers |
| 26 #include "assembler_x86.inline.hpp" | |
| 27 #include "classfile/classLoader.hpp" | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "code/icBuffer.hpp" | |
| 31 #include "code/vtableStubs.hpp" | |
| 32 #include "interpreter/interpreter.hpp" | |
| 33 #include "jvm_windows.h" | |
| 34 #include "memory/allocation.inline.hpp" | |
| 35 #include "mutex_windows.inline.hpp" | |
| 36 #include "nativeInst_x86.hpp" | |
| 37 #include "os_share_windows.hpp" | |
| 38 #include "prims/jniFastGetField.hpp" | |
| 39 #include "prims/jvm.h" | |
| 40 #include "prims/jvm_misc.hpp" | |
| 41 #include "runtime/arguments.hpp" | |
| 42 #include "runtime/extendedPC.hpp" | |
| 43 #include "runtime/frame.inline.hpp" | |
| 44 #include "runtime/interfaceSupport.hpp" | |
| 45 #include "runtime/java.hpp" | |
| 46 #include "runtime/javaCalls.hpp" | |
| 47 #include "runtime/mutexLocker.hpp" | |
| 48 #include "runtime/osThread.hpp" | |
| 49 #include "runtime/sharedRuntime.hpp" | |
| 50 #include "runtime/stubRoutines.hpp" | |
| 51 #include "runtime/timer.hpp" | |
| 52 #include "thread_windows.inline.hpp" | |
| 53 #include "utilities/events.hpp" | |
| 54 #include "utilities/vmError.hpp" | |
| 55 | |
| 0 | 56 # include "unwind_windows_x86.hpp" |
| 57 #undef REG_SP | |
| 58 #undef REG_FP | |
| 59 #undef REG_PC | |
| 60 #ifdef AMD64 | |
| 61 #define REG_SP Rsp | |
| 62 #define REG_FP Rbp | |
| 63 #define REG_PC Rip | |
| 64 #else | |
| 65 #define REG_SP Esp | |
| 66 #define REG_FP Ebp | |
| 67 #define REG_PC Eip | |
| 68 #endif // AMD64 | |
| 69 | |
| 70 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); | |
| 71 | |
| 72 // Install a win32 structured exception handler around thread. | |
| 73 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { | |
| 74 __try { | |
| 75 | |
| 76 #ifndef AMD64 | |
| 77 // We store the current thread in this wrapperthread location | |
| 78 // and determine how far away this address is from the structured | |
| 79 // execption pointer that FS:[0] points to. This get_thread | |
| 80 // code can then get the thread pointer via FS. | |
| 81 // | |
| 82 // Warning: This routine must NEVER be inlined since we'd end up with | |
| 83 // multiple offsets. | |
| 84 // | |
| 85 volatile Thread* wrapperthread = thread; | |
| 86 | |
| 87 if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) { | |
| 88 int thread_ptr_offset; | |
| 89 __asm { | |
| 90 lea eax, dword ptr wrapperthread; | |
| 91 sub eax, dword ptr FS:[0H]; | |
| 92 mov thread_ptr_offset, eax | |
| 93 }; | |
| 94 ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset); | |
| 95 } | |
| 96 #ifdef ASSERT | |
| 97 // Verify that the offset hasn't changed since we initally captured | |
| 98 // it. This might happen if we accidentally ended up with an | |
| 99 // inlined version of this routine. | |
| 100 else { | |
| 101 int test_thread_ptr_offset; | |
| 102 __asm { | |
| 103 lea eax, dword ptr wrapperthread; | |
| 104 sub eax, dword ptr FS:[0H]; | |
| 105 mov test_thread_ptr_offset, eax | |
| 106 }; | |
| 107 assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(), | |
| 108 "thread pointer offset from SEH changed"); | |
| 109 } | |
| 110 #endif // ASSERT | |
| 111 #endif // !AMD64 | |
| 112 | |
| 113 f(value, method, args, thread); | |
| 114 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { | |
| 115 // Nothing to do. | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 #ifdef AMD64 | |
| 120 | |
| 121 // This is the language specific handler for exceptions | |
| 122 // originating from dynamically generated code. | |
| 123 // We call the standard structured exception handler | |
| 124 // We only expect Continued Execution since we cannot unwind | |
| 125 // from generated code. | |
| 126 LONG HandleExceptionFromCodeCache( | |
| 127 IN PEXCEPTION_RECORD ExceptionRecord, | |
| 128 IN ULONG64 EstablisherFrame, | |
| 129 IN OUT PCONTEXT ContextRecord, | |
| 130 IN OUT PDISPATCHER_CONTEXT DispatcherContext) { | |
| 131 EXCEPTION_POINTERS ep; | |
| 132 LONG result; | |
| 133 | |
| 134 ep.ExceptionRecord = ExceptionRecord; | |
| 135 ep.ContextRecord = ContextRecord; | |
| 136 | |
| 137 result = topLevelExceptionFilter(&ep); | |
| 138 | |
| 139 // We better only get a CONTINUE_EXECUTION from our handler | |
| 140 // since we don't have unwind information registered. | |
| 141 | |
| 142 guarantee( result == EXCEPTION_CONTINUE_EXECUTION, | |
| 143 "Unexpected result from topLevelExceptionFilter"); | |
| 144 | |
| 145 return(ExceptionContinueExecution); | |
| 146 } | |
| 147 | |
| 148 | |
| 149 // Structure containing the Windows Data Structures required | |
| 150 // to register our Code Cache exception handler. | |
| 151 // We put these in the CodeCache since the API requires | |
| 152 // all addresses in these structures are relative to the Code | |
| 153 // area registered with RtlAddFunctionTable. | |
| 154 typedef struct { | |
| 155 char ExceptionHandlerInstr[16]; // jmp HandleExceptionFromCodeCache | |
| 156 RUNTIME_FUNCTION rt; | |
| 157 UNWIND_INFO_EH_ONLY unw; | |
| 158 } DynamicCodeData, *pDynamicCodeData; | |
| 159 | |
| 160 #endif // AMD64 | |
| 161 // | |
| 162 // Register our CodeCache area with the OS so it will dispatch exceptions | |
| 163 // to our topLevelExceptionFilter when we take an exception in our | |
| 164 // dynamically generated code. | |
| 165 // | |
| 166 // Arguments: low and high are the address of the full reserved | |
| 167 // codeCache area | |
| 168 // | |
| 169 bool os::register_code_area(char *low, char *high) { | |
| 170 #ifdef AMD64 | |
| 171 | |
| 172 ResourceMark rm; | |
| 173 | |
| 174 pDynamicCodeData pDCD; | |
| 175 PRUNTIME_FUNCTION prt; | |
| 176 PUNWIND_INFO_EH_ONLY punwind; | |
| 177 | |
| 178 // If we are using Vectored Exceptions we don't need this registration | |
| 179 if (UseVectoredExceptions) return true; | |
| 180 | |
| 1748 | 181 BufferBlob* blob = BufferBlob::create("CodeCache Exception Handler", sizeof(DynamicCodeData)); |
| 182 CodeBuffer cb(blob); | |
| 0 | 183 MacroAssembler* masm = new MacroAssembler(&cb); |
| 184 pDCD = (pDynamicCodeData) masm->pc(); | |
| 185 | |
| 186 masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache)); | |
| 187 masm->flush(); | |
| 188 | |
| 189 // Create an Unwind Structure specifying no unwind info | |
| 190 // other than an Exception Handler | |
| 191 punwind = &pDCD->unw; | |
| 192 punwind->Version = 1; | |
| 193 punwind->Flags = UNW_FLAG_EHANDLER; | |
| 194 punwind->SizeOfProlog = 0; | |
| 195 punwind->CountOfCodes = 0; | |
| 196 punwind->FrameRegister = 0; | |
| 197 punwind->FrameOffset = 0; | |
| 198 punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) - | |
| 199 (char*)low; | |
| 200 punwind->ExceptionData[0] = 0; | |
| 201 | |
| 202 // This structure describes the covered dynamic code area. | |
| 203 // Addresses are relative to the beginning on the code cache area | |
| 204 prt = &pDCD->rt; | |
| 205 prt->BeginAddress = 0; | |
| 206 prt->EndAddress = (ULONG)(high - low); | |
| 207 prt->UnwindData = ((char *)punwind - low); | |
| 208 | |
| 209 guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low), | |
| 210 "Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable"); | |
| 211 | |
| 212 #endif // AMD64 | |
| 213 return true; | |
| 214 } | |
| 215 | |
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216 void os::initialize_thread(Thread* thr) { |
| 0 | 217 // Nothing to do. |
| 218 } | |
| 219 | |
| 220 // Atomics and Stub Functions | |
| 221 | |
| 222 typedef jint xchg_func_t (jint, volatile jint*); | |
| 223 typedef intptr_t xchg_ptr_func_t (intptr_t, volatile intptr_t*); | |
| 224 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
| 225 typedef jlong cmpxchg_long_func_t (jlong, volatile jlong*, jlong); | |
| 226 typedef jint add_func_t (jint, volatile jint*); | |
| 227 typedef intptr_t add_ptr_func_t (intptr_t, volatile intptr_t*); | |
| 228 | |
| 229 #ifdef AMD64 | |
| 230 | |
| 231 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
| 232 // try to use the stub: | |
| 233 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
| 234 | |
| 235 if (func != NULL) { | |
| 236 os::atomic_xchg_func = func; | |
| 237 return (*func)(exchange_value, dest); | |
| 238 } | |
| 239 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 240 | |
| 241 jint old_value = *dest; | |
| 242 *dest = exchange_value; | |
| 243 return old_value; | |
| 244 } | |
| 245 | |
| 246 intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) { | |
| 247 // try to use the stub: | |
| 248 xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry()); | |
| 249 | |
| 250 if (func != NULL) { | |
| 251 os::atomic_xchg_ptr_func = func; | |
| 252 return (*func)(exchange_value, dest); | |
| 253 } | |
| 254 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 255 | |
| 256 intptr_t old_value = *dest; | |
| 257 *dest = exchange_value; | |
| 258 return old_value; | |
| 259 } | |
| 260 | |
| 261 | |
| 262 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
| 263 // try to use the stub: | |
| 264 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
| 265 | |
| 266 if (func != NULL) { | |
| 267 os::atomic_cmpxchg_func = func; | |
| 268 return (*func)(exchange_value, dest, compare_value); | |
| 269 } | |
| 270 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 271 | |
| 272 jint old_value = *dest; | |
| 273 if (old_value == compare_value) | |
| 274 *dest = exchange_value; | |
| 275 return old_value; | |
| 276 } | |
| 277 #endif // AMD64 | |
| 278 | |
| 279 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
| 280 // try to use the stub: | |
| 281 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
| 282 | |
| 283 if (func != NULL) { | |
| 284 os::atomic_cmpxchg_long_func = func; | |
| 285 return (*func)(exchange_value, dest, compare_value); | |
| 286 } | |
| 287 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 288 | |
| 289 jlong old_value = *dest; | |
| 290 if (old_value == compare_value) | |
| 291 *dest = exchange_value; | |
| 292 return old_value; | |
| 293 } | |
| 294 | |
| 295 #ifdef AMD64 | |
| 296 | |
| 297 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
| 298 // try to use the stub: | |
| 299 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
| 300 | |
| 301 if (func != NULL) { | |
| 302 os::atomic_add_func = func; | |
| 303 return (*func)(add_value, dest); | |
| 304 } | |
| 305 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 306 | |
| 307 return (*dest) += add_value; | |
| 308 } | |
| 309 | |
| 310 intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) { | |
| 311 // try to use the stub: | |
| 312 add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry()); | |
| 313 | |
| 314 if (func != NULL) { | |
| 315 os::atomic_add_ptr_func = func; | |
| 316 return (*func)(add_value, dest); | |
| 317 } | |
| 318 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
| 319 | |
| 320 return (*dest) += add_value; | |
| 321 } | |
| 322 | |
| 323 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
| 324 xchg_ptr_func_t* os::atomic_xchg_ptr_func = os::atomic_xchg_ptr_bootstrap; | |
| 325 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
| 326 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
| 327 add_ptr_func_t* os::atomic_add_ptr_func = os::atomic_add_ptr_bootstrap; | |
| 328 | |
| 329 #endif // AMD64 | |
| 330 | |
| 331 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
| 332 | |
| 333 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
| 334 intptr_t** ret_sp, intptr_t** ret_fp) { | |
| 335 | |
| 336 ExtendedPC epc; | |
| 337 CONTEXT* uc = (CONTEXT*)ucVoid; | |
| 338 | |
| 339 if (uc != NULL) { | |
| 340 epc = ExtendedPC((address)uc->REG_PC); | |
| 341 if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP; | |
| 342 if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP; | |
| 343 } else { | |
| 344 // construct empty ExtendedPC for return value checking | |
| 345 epc = ExtendedPC(NULL); | |
| 346 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
| 347 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
| 348 } | |
| 349 | |
| 350 return epc; | |
| 351 } | |
| 352 | |
| 353 frame os::fetch_frame_from_context(void* ucVoid) { | |
| 354 intptr_t* sp; | |
| 355 intptr_t* fp; | |
| 356 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
| 357 return frame(sp, fp, epc.pc()); | |
| 358 } | |
| 359 | |
| 360 // VC++ does not save frame pointer on stack in optimized build. It | |
| 361 // can be turned off by /Oy-. If we really want to walk C frames, | |
| 362 // we can use the StackWalk() API. | |
| 363 frame os::get_sender_for_C_frame(frame* fr) { | |
| 364 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
| 365 } | |
| 366 | |
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367 #ifndef AMD64 |
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368 // Returns an estimate of the current stack pointer. Result must be guaranteed |
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369 // to point into the calling threads stack, and be no lower than the current |
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370 // stack pointer. |
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371 address os::current_stack_pointer() { |
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372 int dummy; |
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373 address sp = (address)&dummy; |
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374 return sp; |
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375 } |
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376 #else |
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377 // Returns the current stack pointer. Accurate value needed for |
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378 // os::verify_stack_alignment(). |
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379 address os::current_stack_pointer() { |
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380 typedef address get_sp_func(); |
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381 get_sp_func* func = CAST_TO_FN_PTR(get_sp_func*, |
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382 StubRoutines::x86::get_previous_sp_entry()); |
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383 return (*func)(); |
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384 } |
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385 #endif |
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386 |
| 0 | 387 |
| 388 #ifndef AMD64 | |
| 389 intptr_t* _get_previous_fp() { | |
| 390 intptr_t **frameptr; | |
| 391 __asm { | |
| 392 mov frameptr, ebp | |
| 393 }; | |
| 394 return *frameptr; | |
| 395 } | |
| 396 #endif // !AMD64 | |
| 397 | |
| 398 frame os::current_frame() { | |
| 399 | |
| 400 #ifdef AMD64 | |
| 401 // apparently _asm not supported on windows amd64 | |
| 402 typedef intptr_t* get_fp_func (); | |
| 403 get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*, | |
| 304 | 404 StubRoutines::x86::get_previous_fp_entry()); |
| 0 | 405 if (func == NULL) return frame(NULL, NULL, NULL); |
| 406 intptr_t* fp = (*func)(); | |
| 407 #else | |
| 408 intptr_t* fp = _get_previous_fp(); | |
| 409 #endif // AMD64 | |
| 410 | |
| 411 frame myframe((intptr_t*)os::current_stack_pointer(), | |
| 412 (intptr_t*)fp, | |
| 413 CAST_FROM_FN_PTR(address, os::current_frame)); | |
| 414 if (os::is_first_C_frame(&myframe)) { | |
| 415 // stack is not walkable | |
| 416 return frame(NULL, NULL, NULL); | |
| 417 } else { | |
| 418 return os::get_sender_for_C_frame(&myframe); | |
| 419 } | |
| 420 } | |
| 421 | |
| 422 void os::print_context(outputStream *st, void *context) { | |
| 423 if (context == NULL) return; | |
| 424 | |
| 425 CONTEXT* uc = (CONTEXT*)context; | |
| 426 | |
| 427 st->print_cr("Registers:"); | |
| 428 #ifdef AMD64 | |
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429 st->print( "RAX=" INTPTR_FORMAT, uc->Rax); |
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430 st->print(", RBX=" INTPTR_FORMAT, uc->Rbx); |
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431 st->print(", RCX=" INTPTR_FORMAT, uc->Rcx); |
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432 st->print(", RDX=" INTPTR_FORMAT, uc->Rdx); |
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433 st->cr(); |
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434 st->print( "RSP=" INTPTR_FORMAT, uc->Rsp); |
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435 st->print(", RBP=" INTPTR_FORMAT, uc->Rbp); |
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436 st->print(", RSI=" INTPTR_FORMAT, uc->Rsi); |
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437 st->print(", RDI=" INTPTR_FORMAT, uc->Rdi); |
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438 st->cr(); |
| 1907 | 439 st->print( "R8 =" INTPTR_FORMAT, uc->R8); |
| 440 st->print(", R9 =" INTPTR_FORMAT, uc->R9); | |
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441 st->print(", R10=" INTPTR_FORMAT, uc->R10); |
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442 st->print(", R11=" INTPTR_FORMAT, uc->R11); |
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443 st->cr(); |
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444 st->print( "R12=" INTPTR_FORMAT, uc->R12); |
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445 st->print(", R13=" INTPTR_FORMAT, uc->R13); |
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446 st->print(", R14=" INTPTR_FORMAT, uc->R14); |
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447 st->print(", R15=" INTPTR_FORMAT, uc->R15); |
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448 st->cr(); |
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449 st->print( "RIP=" INTPTR_FORMAT, uc->Rip); |
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450 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); |
| 0 | 451 #else |
| 452 st->print( "EAX=" INTPTR_FORMAT, uc->Eax); | |
| 453 st->print(", EBX=" INTPTR_FORMAT, uc->Ebx); | |
| 454 st->print(", ECX=" INTPTR_FORMAT, uc->Ecx); | |
| 455 st->print(", EDX=" INTPTR_FORMAT, uc->Edx); | |
| 456 st->cr(); | |
| 457 st->print( "ESP=" INTPTR_FORMAT, uc->Esp); | |
| 458 st->print(", EBP=" INTPTR_FORMAT, uc->Ebp); | |
| 459 st->print(", ESI=" INTPTR_FORMAT, uc->Esi); | |
| 460 st->print(", EDI=" INTPTR_FORMAT, uc->Edi); | |
| 461 st->cr(); | |
| 462 st->print( "EIP=" INTPTR_FORMAT, uc->Eip); | |
| 463 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); | |
| 464 #endif // AMD64 | |
| 465 st->cr(); | |
| 466 st->cr(); | |
| 467 | |
| 468 intptr_t *sp = (intptr_t *)uc->REG_SP; | |
| 469 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
| 470 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); | |
| 471 st->cr(); | |
| 472 | |
| 473 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
| 474 // point to garbage if entry point in an nmethod is corrupted. Leave | |
| 475 // this at the end, and hope for the best. | |
| 476 address pc = (address)uc->REG_PC; | |
| 477 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
| 1907 | 478 print_hex_dump(st, pc - 32, pc + 32, sizeof(char)); |
| 479 st->cr(); | |
| 480 } | |
| 481 | |
| 482 | |
| 483 void os::print_register_info(outputStream *st, void *context) { | |
| 484 if (context == NULL) return; | |
| 485 | |
| 486 CONTEXT* uc = (CONTEXT*)context; | |
| 487 | |
| 488 st->print_cr("Register to memory mapping:"); | |
| 489 st->cr(); | |
| 490 | |
| 491 // this is only for the "general purpose" registers | |
| 492 | |
| 493 #ifdef AMD64 | |
| 494 st->print("RAX="); print_location(st, uc->Rax); | |
| 495 st->print("RBX="); print_location(st, uc->Rbx); | |
| 496 st->print("RCX="); print_location(st, uc->Rcx); | |
| 497 st->print("RDX="); print_location(st, uc->Rdx); | |
| 498 st->print("RSP="); print_location(st, uc->Rsp); | |
| 499 st->print("RBP="); print_location(st, uc->Rbp); | |
| 500 st->print("RSI="); print_location(st, uc->Rsi); | |
| 501 st->print("RDI="); print_location(st, uc->Rdi); | |
| 502 st->print("R8 ="); print_location(st, uc->R8); | |
| 503 st->print("R9 ="); print_location(st, uc->R9); | |
| 504 st->print("R10="); print_location(st, uc->R10); | |
| 505 st->print("R11="); print_location(st, uc->R11); | |
| 506 st->print("R12="); print_location(st, uc->R12); | |
| 507 st->print("R13="); print_location(st, uc->R13); | |
| 508 st->print("R14="); print_location(st, uc->R14); | |
| 509 st->print("R15="); print_location(st, uc->R15); | |
| 510 #else | |
| 511 st->print("EAX="); print_location(st, uc->Eax); | |
| 512 st->print("EBX="); print_location(st, uc->Ebx); | |
| 513 st->print("ECX="); print_location(st, uc->Ecx); | |
| 514 st->print("EDX="); print_location(st, uc->Edx); | |
| 515 st->print("ESP="); print_location(st, uc->Esp); | |
| 516 st->print("EBP="); print_location(st, uc->Ebp); | |
| 517 st->print("ESI="); print_location(st, uc->Esi); | |
| 518 st->print("EDI="); print_location(st, uc->Edi); | |
| 519 #endif | |
| 520 | |
| 0 | 521 st->cr(); |
| 522 } | |
| 523 | |
| 524 extern "C" int SafeFetch32 (int * adr, int Err) { | |
| 525 int rv = Err ; | |
| 526 _try { | |
| 527 rv = *((volatile int *) adr) ; | |
| 528 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
| 529 } | |
| 530 return rv ; | |
| 531 } | |
| 532 | |
| 533 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t Err) { | |
| 534 intptr_t rv = Err ; | |
| 535 _try { | |
| 536 rv = *((volatile intptr_t *) adr) ; | |
| 537 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
| 538 } | |
| 539 return rv ; | |
| 540 } | |
| 541 | |
| 542 extern "C" int SpinPause () { | |
| 543 #ifdef AMD64 | |
| 544 return 0 ; | |
| 545 #else | |
| 546 // pause == rep:nop | |
| 547 // On systems that don't support pause a rep:nop | |
| 548 // is executed as a nop. The rep: prefix is ignored. | |
| 549 _asm { | |
| 550 pause ; | |
| 551 }; | |
| 552 return 1 ; | |
| 553 #endif // AMD64 | |
| 554 } | |
| 555 | |
| 556 | |
| 557 void os::setup_fpu() { | |
| 558 #ifndef AMD64 | |
| 559 int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std(); | |
| 560 __asm fldcw fpu_cntrl_word; | |
| 561 #endif // !AMD64 | |
| 562 } | |
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563 |
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564 #ifndef PRODUCT |
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565 void os::verify_stack_alignment() { |
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566 #ifdef AMD64 |
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567 assert(((intptr_t)os::current_stack_pointer() & (StackAlignmentInBytes-1)) == 0, "incorrect stack alignment"); |
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568 #endif |
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569 } |
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570 #endif |