Mercurial > hg > truffle
annotate src/os_cpu/windows_x86/vm/os_windows_x86.cpp @ 6897:588f08ed16cf
Merge
author | kvn |
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date | Fri, 26 Oct 2012 12:06:55 -0700 |
parents | b9a9ed0f8eeb |
children | 5ec0c42da025 |
rev | line source |
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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 } | |
5903
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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 |