Mercurial > hg > graal-compiler
comparison src/os_cpu/windows_x86/vm/os_windows_x86.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | dc7f315e41f7 |
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1 /* | |
2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // do not include precompiled header file | |
26 # include "incls/_os_windows_x86.cpp.incl" | |
27 # include "unwind_windows_x86.hpp" | |
28 #undef REG_SP | |
29 #undef REG_FP | |
30 #undef REG_PC | |
31 #ifdef AMD64 | |
32 #define REG_SP Rsp | |
33 #define REG_FP Rbp | |
34 #define REG_PC Rip | |
35 #else | |
36 #define REG_SP Esp | |
37 #define REG_FP Ebp | |
38 #define REG_PC Eip | |
39 #endif // AMD64 | |
40 | |
41 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* ); | |
42 | |
43 // Install a win32 structured exception handler around thread. | |
44 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { | |
45 __try { | |
46 | |
47 #ifndef AMD64 | |
48 // We store the current thread in this wrapperthread location | |
49 // and determine how far away this address is from the structured | |
50 // execption pointer that FS:[0] points to. This get_thread | |
51 // code can then get the thread pointer via FS. | |
52 // | |
53 // Warning: This routine must NEVER be inlined since we'd end up with | |
54 // multiple offsets. | |
55 // | |
56 volatile Thread* wrapperthread = thread; | |
57 | |
58 if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) { | |
59 int thread_ptr_offset; | |
60 __asm { | |
61 lea eax, dword ptr wrapperthread; | |
62 sub eax, dword ptr FS:[0H]; | |
63 mov thread_ptr_offset, eax | |
64 }; | |
65 ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset); | |
66 } | |
67 #ifdef ASSERT | |
68 // Verify that the offset hasn't changed since we initally captured | |
69 // it. This might happen if we accidentally ended up with an | |
70 // inlined version of this routine. | |
71 else { | |
72 int test_thread_ptr_offset; | |
73 __asm { | |
74 lea eax, dword ptr wrapperthread; | |
75 sub eax, dword ptr FS:[0H]; | |
76 mov test_thread_ptr_offset, eax | |
77 }; | |
78 assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(), | |
79 "thread pointer offset from SEH changed"); | |
80 } | |
81 #endif // ASSERT | |
82 #endif // !AMD64 | |
83 | |
84 f(value, method, args, thread); | |
85 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) { | |
86 // Nothing to do. | |
87 } | |
88 } | |
89 | |
90 #ifdef AMD64 | |
91 | |
92 // This is the language specific handler for exceptions | |
93 // originating from dynamically generated code. | |
94 // We call the standard structured exception handler | |
95 // We only expect Continued Execution since we cannot unwind | |
96 // from generated code. | |
97 LONG HandleExceptionFromCodeCache( | |
98 IN PEXCEPTION_RECORD ExceptionRecord, | |
99 IN ULONG64 EstablisherFrame, | |
100 IN OUT PCONTEXT ContextRecord, | |
101 IN OUT PDISPATCHER_CONTEXT DispatcherContext) { | |
102 EXCEPTION_POINTERS ep; | |
103 LONG result; | |
104 | |
105 ep.ExceptionRecord = ExceptionRecord; | |
106 ep.ContextRecord = ContextRecord; | |
107 | |
108 result = topLevelExceptionFilter(&ep); | |
109 | |
110 // We better only get a CONTINUE_EXECUTION from our handler | |
111 // since we don't have unwind information registered. | |
112 | |
113 guarantee( result == EXCEPTION_CONTINUE_EXECUTION, | |
114 "Unexpected result from topLevelExceptionFilter"); | |
115 | |
116 return(ExceptionContinueExecution); | |
117 } | |
118 | |
119 | |
120 // Structure containing the Windows Data Structures required | |
121 // to register our Code Cache exception handler. | |
122 // We put these in the CodeCache since the API requires | |
123 // all addresses in these structures are relative to the Code | |
124 // area registered with RtlAddFunctionTable. | |
125 typedef struct { | |
126 char ExceptionHandlerInstr[16]; // jmp HandleExceptionFromCodeCache | |
127 RUNTIME_FUNCTION rt; | |
128 UNWIND_INFO_EH_ONLY unw; | |
129 } DynamicCodeData, *pDynamicCodeData; | |
130 | |
131 #endif // AMD64 | |
132 // | |
133 // Register our CodeCache area with the OS so it will dispatch exceptions | |
134 // to our topLevelExceptionFilter when we take an exception in our | |
135 // dynamically generated code. | |
136 // | |
137 // Arguments: low and high are the address of the full reserved | |
138 // codeCache area | |
139 // | |
140 bool os::register_code_area(char *low, char *high) { | |
141 #ifdef AMD64 | |
142 | |
143 ResourceMark rm; | |
144 | |
145 pDynamicCodeData pDCD; | |
146 PRUNTIME_FUNCTION prt; | |
147 PUNWIND_INFO_EH_ONLY punwind; | |
148 | |
149 // If we are using Vectored Exceptions we don't need this registration | |
150 if (UseVectoredExceptions) return true; | |
151 | |
152 BufferBlob* b = BufferBlob::create("CodeCache Exception Handler", sizeof (DynamicCodeData)); | |
153 CodeBuffer cb(b->instructions_begin(), b->instructions_size()); | |
154 MacroAssembler* masm = new MacroAssembler(&cb); | |
155 pDCD = (pDynamicCodeData) masm->pc(); | |
156 | |
157 masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache)); | |
158 masm->flush(); | |
159 | |
160 // Create an Unwind Structure specifying no unwind info | |
161 // other than an Exception Handler | |
162 punwind = &pDCD->unw; | |
163 punwind->Version = 1; | |
164 punwind->Flags = UNW_FLAG_EHANDLER; | |
165 punwind->SizeOfProlog = 0; | |
166 punwind->CountOfCodes = 0; | |
167 punwind->FrameRegister = 0; | |
168 punwind->FrameOffset = 0; | |
169 punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) - | |
170 (char*)low; | |
171 punwind->ExceptionData[0] = 0; | |
172 | |
173 // This structure describes the covered dynamic code area. | |
174 // Addresses are relative to the beginning on the code cache area | |
175 prt = &pDCD->rt; | |
176 prt->BeginAddress = 0; | |
177 prt->EndAddress = (ULONG)(high - low); | |
178 prt->UnwindData = ((char *)punwind - low); | |
179 | |
180 guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low), | |
181 "Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable"); | |
182 | |
183 #endif // AMD64 | |
184 return true; | |
185 } | |
186 | |
187 void os::initialize_thread() { | |
188 // Nothing to do. | |
189 } | |
190 | |
191 // Atomics and Stub Functions | |
192 | |
193 typedef jint xchg_func_t (jint, volatile jint*); | |
194 typedef intptr_t xchg_ptr_func_t (intptr_t, volatile intptr_t*); | |
195 typedef jint cmpxchg_func_t (jint, volatile jint*, jint); | |
196 typedef jlong cmpxchg_long_func_t (jlong, volatile jlong*, jlong); | |
197 typedef jint add_func_t (jint, volatile jint*); | |
198 typedef intptr_t add_ptr_func_t (intptr_t, volatile intptr_t*); | |
199 typedef void fence_func_t (); | |
200 | |
201 #ifdef AMD64 | |
202 | |
203 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) { | |
204 // try to use the stub: | |
205 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry()); | |
206 | |
207 if (func != NULL) { | |
208 os::atomic_xchg_func = func; | |
209 return (*func)(exchange_value, dest); | |
210 } | |
211 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
212 | |
213 jint old_value = *dest; | |
214 *dest = exchange_value; | |
215 return old_value; | |
216 } | |
217 | |
218 intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) { | |
219 // try to use the stub: | |
220 xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry()); | |
221 | |
222 if (func != NULL) { | |
223 os::atomic_xchg_ptr_func = func; | |
224 return (*func)(exchange_value, dest); | |
225 } | |
226 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
227 | |
228 intptr_t old_value = *dest; | |
229 *dest = exchange_value; | |
230 return old_value; | |
231 } | |
232 | |
233 | |
234 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) { | |
235 // try to use the stub: | |
236 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry()); | |
237 | |
238 if (func != NULL) { | |
239 os::atomic_cmpxchg_func = func; | |
240 return (*func)(exchange_value, dest, compare_value); | |
241 } | |
242 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
243 | |
244 jint old_value = *dest; | |
245 if (old_value == compare_value) | |
246 *dest = exchange_value; | |
247 return old_value; | |
248 } | |
249 #endif // AMD64 | |
250 | |
251 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
252 // try to use the stub: | |
253 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry()); | |
254 | |
255 if (func != NULL) { | |
256 os::atomic_cmpxchg_long_func = func; | |
257 return (*func)(exchange_value, dest, compare_value); | |
258 } | |
259 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
260 | |
261 jlong old_value = *dest; | |
262 if (old_value == compare_value) | |
263 *dest = exchange_value; | |
264 return old_value; | |
265 } | |
266 | |
267 #ifdef AMD64 | |
268 | |
269 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) { | |
270 // try to use the stub: | |
271 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry()); | |
272 | |
273 if (func != NULL) { | |
274 os::atomic_add_func = func; | |
275 return (*func)(add_value, dest); | |
276 } | |
277 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
278 | |
279 return (*dest) += add_value; | |
280 } | |
281 | |
282 intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) { | |
283 // try to use the stub: | |
284 add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry()); | |
285 | |
286 if (func != NULL) { | |
287 os::atomic_add_ptr_func = func; | |
288 return (*func)(add_value, dest); | |
289 } | |
290 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
291 | |
292 return (*dest) += add_value; | |
293 } | |
294 | |
295 void os::fence_bootstrap() { | |
296 // try to use the stub: | |
297 fence_func_t* func = CAST_TO_FN_PTR(fence_func_t*, StubRoutines::fence_entry()); | |
298 | |
299 if (func != NULL) { | |
300 os::fence_func = func; | |
301 (*func)(); | |
302 return; | |
303 } | |
304 assert(Threads::number_of_threads() == 0, "for bootstrap only"); | |
305 | |
306 // don't have to do anything for a single thread | |
307 } | |
308 | |
309 | |
310 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap; | |
311 xchg_ptr_func_t* os::atomic_xchg_ptr_func = os::atomic_xchg_ptr_bootstrap; | |
312 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap; | |
313 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap; | |
314 add_ptr_func_t* os::atomic_add_ptr_func = os::atomic_add_ptr_bootstrap; | |
315 fence_func_t* os::fence_func = os::fence_bootstrap; | |
316 | |
317 #endif // AMD64 | |
318 | |
319 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap; | |
320 | |
321 ExtendedPC os::fetch_frame_from_context(void* ucVoid, | |
322 intptr_t** ret_sp, intptr_t** ret_fp) { | |
323 | |
324 ExtendedPC epc; | |
325 CONTEXT* uc = (CONTEXT*)ucVoid; | |
326 | |
327 if (uc != NULL) { | |
328 epc = ExtendedPC((address)uc->REG_PC); | |
329 if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP; | |
330 if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP; | |
331 } else { | |
332 // construct empty ExtendedPC for return value checking | |
333 epc = ExtendedPC(NULL); | |
334 if (ret_sp) *ret_sp = (intptr_t *)NULL; | |
335 if (ret_fp) *ret_fp = (intptr_t *)NULL; | |
336 } | |
337 | |
338 return epc; | |
339 } | |
340 | |
341 frame os::fetch_frame_from_context(void* ucVoid) { | |
342 intptr_t* sp; | |
343 intptr_t* fp; | |
344 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp); | |
345 return frame(sp, fp, epc.pc()); | |
346 } | |
347 | |
348 // VC++ does not save frame pointer on stack in optimized build. It | |
349 // can be turned off by /Oy-. If we really want to walk C frames, | |
350 // we can use the StackWalk() API. | |
351 frame os::get_sender_for_C_frame(frame* fr) { | |
352 return frame(fr->sender_sp(), fr->link(), fr->sender_pc()); | |
353 } | |
354 | |
355 | |
356 #ifndef AMD64 | |
357 intptr_t* _get_previous_fp() { | |
358 intptr_t **frameptr; | |
359 __asm { | |
360 mov frameptr, ebp | |
361 }; | |
362 return *frameptr; | |
363 } | |
364 #endif // !AMD64 | |
365 | |
366 frame os::current_frame() { | |
367 | |
368 #ifdef AMD64 | |
369 // apparently _asm not supported on windows amd64 | |
370 typedef intptr_t* get_fp_func (); | |
371 get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*, | |
372 StubRoutines::amd64::get_previous_fp_entry()); | |
373 if (func == NULL) return frame(NULL, NULL, NULL); | |
374 intptr_t* fp = (*func)(); | |
375 #else | |
376 intptr_t* fp = _get_previous_fp(); | |
377 #endif // AMD64 | |
378 | |
379 frame myframe((intptr_t*)os::current_stack_pointer(), | |
380 (intptr_t*)fp, | |
381 CAST_FROM_FN_PTR(address, os::current_frame)); | |
382 if (os::is_first_C_frame(&myframe)) { | |
383 // stack is not walkable | |
384 return frame(NULL, NULL, NULL); | |
385 } else { | |
386 return os::get_sender_for_C_frame(&myframe); | |
387 } | |
388 } | |
389 | |
390 void os::print_context(outputStream *st, void *context) { | |
391 if (context == NULL) return; | |
392 | |
393 CONTEXT* uc = (CONTEXT*)context; | |
394 | |
395 st->print_cr("Registers:"); | |
396 #ifdef AMD64 | |
397 st->print( "EAX=" INTPTR_FORMAT, uc->Rax); | |
398 st->print(", EBX=" INTPTR_FORMAT, uc->Rbx); | |
399 st->print(", ECX=" INTPTR_FORMAT, uc->Rcx); | |
400 st->print(", EDX=" INTPTR_FORMAT, uc->Rdx); | |
401 st->cr(); | |
402 st->print( "ESP=" INTPTR_FORMAT, uc->Rsp); | |
403 st->print(", EBP=" INTPTR_FORMAT, uc->Rbp); | |
404 st->print(", ESI=" INTPTR_FORMAT, uc->Rsi); | |
405 st->print(", EDI=" INTPTR_FORMAT, uc->Rdi); | |
406 st->cr(); | |
407 st->print( "EIP=" INTPTR_FORMAT, uc->Rip); | |
408 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); | |
409 #else | |
410 st->print( "EAX=" INTPTR_FORMAT, uc->Eax); | |
411 st->print(", EBX=" INTPTR_FORMAT, uc->Ebx); | |
412 st->print(", ECX=" INTPTR_FORMAT, uc->Ecx); | |
413 st->print(", EDX=" INTPTR_FORMAT, uc->Edx); | |
414 st->cr(); | |
415 st->print( "ESP=" INTPTR_FORMAT, uc->Esp); | |
416 st->print(", EBP=" INTPTR_FORMAT, uc->Ebp); | |
417 st->print(", ESI=" INTPTR_FORMAT, uc->Esi); | |
418 st->print(", EDI=" INTPTR_FORMAT, uc->Edi); | |
419 st->cr(); | |
420 st->print( "EIP=" INTPTR_FORMAT, uc->Eip); | |
421 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags); | |
422 #endif // AMD64 | |
423 st->cr(); | |
424 st->cr(); | |
425 | |
426 intptr_t *sp = (intptr_t *)uc->REG_SP; | |
427 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp); | |
428 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t)); | |
429 st->cr(); | |
430 | |
431 // Note: it may be unsafe to inspect memory near pc. For example, pc may | |
432 // point to garbage if entry point in an nmethod is corrupted. Leave | |
433 // this at the end, and hope for the best. | |
434 address pc = (address)uc->REG_PC; | |
435 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc); | |
436 print_hex_dump(st, pc - 16, pc + 16, sizeof(char)); | |
437 st->cr(); | |
438 } | |
439 | |
440 extern "C" int SafeFetch32 (int * adr, int Err) { | |
441 int rv = Err ; | |
442 _try { | |
443 rv = *((volatile int *) adr) ; | |
444 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
445 } | |
446 return rv ; | |
447 } | |
448 | |
449 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t Err) { | |
450 intptr_t rv = Err ; | |
451 _try { | |
452 rv = *((volatile intptr_t *) adr) ; | |
453 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
454 } | |
455 return rv ; | |
456 } | |
457 | |
458 extern "C" int SpinPause () { | |
459 #ifdef AMD64 | |
460 return 0 ; | |
461 #else | |
462 // pause == rep:nop | |
463 // On systems that don't support pause a rep:nop | |
464 // is executed as a nop. The rep: prefix is ignored. | |
465 _asm { | |
466 pause ; | |
467 }; | |
468 return 1 ; | |
469 #endif // AMD64 | |
470 } | |
471 | |
472 | |
473 void os::setup_fpu() { | |
474 #ifndef AMD64 | |
475 int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std(); | |
476 __asm fldcw fpu_cntrl_word; | |
477 #endif // !AMD64 | |
478 } |