1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
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/hpi.hpp"
45 #include "runtime/interfaceSupport.hpp"
46 #include "runtime/java.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/mutexLocker.hpp"
49 #include "runtime/osThread.hpp"
50 #include "runtime/sharedRuntime.hpp"
51 #include "runtime/stubRoutines.hpp"
52 #include "runtime/timer.hpp"
53 #include "thread_windows.inline.hpp"
54 #include "utilities/events.hpp"
55 #include "utilities/vmError.hpp"
56 #ifdef COMPILER1
57 #include "c1/c1_Runtime1.hpp"
58 #endif
59 #ifdef COMPILER2
60 #include "opto/runtime.hpp"
61 #endif
62
63 # include "unwind_windows_x86.hpp"
64 #undef REG_SP
65 #undef REG_FP
66 #undef REG_PC
67 #ifdef AMD64
68 #define REG_SP Rsp
69 #define REG_FP Rbp
70 #define REG_PC Rip
71 #else
72 #define REG_SP Esp
73 #define REG_FP Ebp
74 #define REG_PC Eip
75 #endif // AMD64
76
77 extern LONG WINAPI topLevelExceptionFilter(_EXCEPTION_POINTERS* );
78
79 // Install a win32 structured exception handler around thread.
80 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) {
81 __try {
82
83 #ifndef AMD64
84 // We store the current thread in this wrapperthread location
85 // and determine how far away this address is from the structured
86 // execption pointer that FS:[0] points to. This get_thread
87 // code can then get the thread pointer via FS.
88 //
89 // Warning: This routine must NEVER be inlined since we'd end up with
90 // multiple offsets.
91 //
92 volatile Thread* wrapperthread = thread;
93
94 if ( ThreadLocalStorage::get_thread_ptr_offset() == 0 ) {
95 int thread_ptr_offset;
96 __asm {
97 lea eax, dword ptr wrapperthread;
98 sub eax, dword ptr FS:[0H];
99 mov thread_ptr_offset, eax
100 };
101 ThreadLocalStorage::set_thread_ptr_offset(thread_ptr_offset);
102 }
103 #ifdef ASSERT
104 // Verify that the offset hasn't changed since we initally captured
105 // it. This might happen if we accidentally ended up with an
106 // inlined version of this routine.
107 else {
108 int test_thread_ptr_offset;
109 __asm {
110 lea eax, dword ptr wrapperthread;
111 sub eax, dword ptr FS:[0H];
112 mov test_thread_ptr_offset, eax
113 };
114 assert(test_thread_ptr_offset == ThreadLocalStorage::get_thread_ptr_offset(),
115 "thread pointer offset from SEH changed");
116 }
117 #endif // ASSERT
118 #endif // !AMD64
119
120 f(value, method, args, thread);
121 } __except(topLevelExceptionFilter((_EXCEPTION_POINTERS*)_exception_info())) {
122 // Nothing to do.
123 }
124 }
125
126 #ifdef AMD64
127
128 // This is the language specific handler for exceptions
129 // originating from dynamically generated code.
130 // We call the standard structured exception handler
131 // We only expect Continued Execution since we cannot unwind
132 // from generated code.
133 LONG HandleExceptionFromCodeCache(
134 IN PEXCEPTION_RECORD ExceptionRecord,
135 IN ULONG64 EstablisherFrame,
136 IN OUT PCONTEXT ContextRecord,
137 IN OUT PDISPATCHER_CONTEXT DispatcherContext) {
138 EXCEPTION_POINTERS ep;
139 LONG result;
140
141 ep.ExceptionRecord = ExceptionRecord;
142 ep.ContextRecord = ContextRecord;
143
144 result = topLevelExceptionFilter(&ep);
145
146 // We better only get a CONTINUE_EXECUTION from our handler
147 // since we don't have unwind information registered.
148
149 guarantee( result == EXCEPTION_CONTINUE_EXECUTION,
150 "Unexpected result from topLevelExceptionFilter");
151
152 return(ExceptionContinueExecution);
153 }
154
155
156 // Structure containing the Windows Data Structures required
157 // to register our Code Cache exception handler.
158 // We put these in the CodeCache since the API requires
159 // all addresses in these structures are relative to the Code
160 // area registered with RtlAddFunctionTable.
161 typedef struct {
162 char ExceptionHandlerInstr[16]; // jmp HandleExceptionFromCodeCache
163 RUNTIME_FUNCTION rt;
164 UNWIND_INFO_EH_ONLY unw;
165 } DynamicCodeData, *pDynamicCodeData;
166
167 #endif // AMD64
168 //
169 // Register our CodeCache area with the OS so it will dispatch exceptions
170 // to our topLevelExceptionFilter when we take an exception in our
171 // dynamically generated code.
172 //
173 // Arguments: low and high are the address of the full reserved
174 // codeCache area
175 //
176 bool os::register_code_area(char *low, char *high) {
177 #ifdef AMD64
178
179 ResourceMark rm;
180
181 pDynamicCodeData pDCD;
182 PRUNTIME_FUNCTION prt;
183 PUNWIND_INFO_EH_ONLY punwind;
184
185 // If we are using Vectored Exceptions we don't need this registration
186 if (UseVectoredExceptions) return true;
187
188 BufferBlob* blob = BufferBlob::create("CodeCache Exception Handler", sizeof(DynamicCodeData));
189 CodeBuffer cb(blob);
190 MacroAssembler* masm = new MacroAssembler(&cb);
191 pDCD = (pDynamicCodeData) masm->pc();
192
193 masm->jump(ExternalAddress((address)&HandleExceptionFromCodeCache));
194 masm->flush();
195
196 // Create an Unwind Structure specifying no unwind info
197 // other than an Exception Handler
198 punwind = &pDCD->unw;
199 punwind->Version = 1;
200 punwind->Flags = UNW_FLAG_EHANDLER;
201 punwind->SizeOfProlog = 0;
202 punwind->CountOfCodes = 0;
203 punwind->FrameRegister = 0;
204 punwind->FrameOffset = 0;
205 punwind->ExceptionHandler = (char *)(&(pDCD->ExceptionHandlerInstr[0])) -
206 (char*)low;
207 punwind->ExceptionData[0] = 0;
208
209 // This structure describes the covered dynamic code area.
210 // Addresses are relative to the beginning on the code cache area
211 prt = &pDCD->rt;
212 prt->BeginAddress = 0;
213 prt->EndAddress = (ULONG)(high - low);
214 prt->UnwindData = ((char *)punwind - low);
215
216 guarantee(RtlAddFunctionTable(prt, 1, (ULONGLONG)low),
217 "Failed to register Dynamic Code Exception Handler with RtlAddFunctionTable");
218
219 #endif // AMD64
220 return true;
221 }
222
223 void os::initialize_thread() {
224 // Nothing to do.
225 }
226
227 // Atomics and Stub Functions
228
229 typedef jint xchg_func_t (jint, volatile jint*);
230 typedef intptr_t xchg_ptr_func_t (intptr_t, volatile intptr_t*);
231 typedef jint cmpxchg_func_t (jint, volatile jint*, jint);
232 typedef jlong cmpxchg_long_func_t (jlong, volatile jlong*, jlong);
233 typedef jint add_func_t (jint, volatile jint*);
234 typedef intptr_t add_ptr_func_t (intptr_t, volatile intptr_t*);
235
236 #ifdef AMD64
237
238 jint os::atomic_xchg_bootstrap(jint exchange_value, volatile jint* dest) {
239 // try to use the stub:
240 xchg_func_t* func = CAST_TO_FN_PTR(xchg_func_t*, StubRoutines::atomic_xchg_entry());
241
242 if (func != NULL) {
243 os::atomic_xchg_func = func;
244 return (*func)(exchange_value, dest);
245 }
246 assert(Threads::number_of_threads() == 0, "for bootstrap only");
247
248 jint old_value = *dest;
249 *dest = exchange_value;
250 return old_value;
251 }
252
253 intptr_t os::atomic_xchg_ptr_bootstrap(intptr_t exchange_value, volatile intptr_t* dest) {
254 // try to use the stub:
255 xchg_ptr_func_t* func = CAST_TO_FN_PTR(xchg_ptr_func_t*, StubRoutines::atomic_xchg_ptr_entry());
256
257 if (func != NULL) {
258 os::atomic_xchg_ptr_func = func;
259 return (*func)(exchange_value, dest);
260 }
261 assert(Threads::number_of_threads() == 0, "for bootstrap only");
262
263 intptr_t old_value = *dest;
264 *dest = exchange_value;
265 return old_value;
266 }
267
268
269 jint os::atomic_cmpxchg_bootstrap(jint exchange_value, volatile jint* dest, jint compare_value) {
270 // try to use the stub:
271 cmpxchg_func_t* func = CAST_TO_FN_PTR(cmpxchg_func_t*, StubRoutines::atomic_cmpxchg_entry());
272
273 if (func != NULL) {
274 os::atomic_cmpxchg_func = func;
275 return (*func)(exchange_value, dest, compare_value);
276 }
277 assert(Threads::number_of_threads() == 0, "for bootstrap only");
278
279 jint old_value = *dest;
280 if (old_value == compare_value)
281 *dest = exchange_value;
282 return old_value;
283 }
284 #endif // AMD64
285
286 jlong os::atomic_cmpxchg_long_bootstrap(jlong exchange_value, volatile jlong* dest, jlong compare_value) {
287 // try to use the stub:
288 cmpxchg_long_func_t* func = CAST_TO_FN_PTR(cmpxchg_long_func_t*, StubRoutines::atomic_cmpxchg_long_entry());
289
290 if (func != NULL) {
291 os::atomic_cmpxchg_long_func = func;
292 return (*func)(exchange_value, dest, compare_value);
293 }
294 assert(Threads::number_of_threads() == 0, "for bootstrap only");
295
296 jlong old_value = *dest;
297 if (old_value == compare_value)
298 *dest = exchange_value;
299 return old_value;
300 }
301
302 #ifdef AMD64
303
304 jint os::atomic_add_bootstrap(jint add_value, volatile jint* dest) {
305 // try to use the stub:
306 add_func_t* func = CAST_TO_FN_PTR(add_func_t*, StubRoutines::atomic_add_entry());
307
308 if (func != NULL) {
309 os::atomic_add_func = func;
310 return (*func)(add_value, dest);
311 }
312 assert(Threads::number_of_threads() == 0, "for bootstrap only");
313
314 return (*dest) += add_value;
315 }
316
317 intptr_t os::atomic_add_ptr_bootstrap(intptr_t add_value, volatile intptr_t* dest) {
318 // try to use the stub:
319 add_ptr_func_t* func = CAST_TO_FN_PTR(add_ptr_func_t*, StubRoutines::atomic_add_ptr_entry());
320
321 if (func != NULL) {
322 os::atomic_add_ptr_func = func;
323 return (*func)(add_value, dest);
324 }
325 assert(Threads::number_of_threads() == 0, "for bootstrap only");
326
327 return (*dest) += add_value;
328 }
329
330 xchg_func_t* os::atomic_xchg_func = os::atomic_xchg_bootstrap;
331 xchg_ptr_func_t* os::atomic_xchg_ptr_func = os::atomic_xchg_ptr_bootstrap;
332 cmpxchg_func_t* os::atomic_cmpxchg_func = os::atomic_cmpxchg_bootstrap;
333 add_func_t* os::atomic_add_func = os::atomic_add_bootstrap;
334 add_ptr_func_t* os::atomic_add_ptr_func = os::atomic_add_ptr_bootstrap;
335
336 #endif // AMD64
337
338 cmpxchg_long_func_t* os::atomic_cmpxchg_long_func = os::atomic_cmpxchg_long_bootstrap;
339
340 ExtendedPC os::fetch_frame_from_context(void* ucVoid,
341 intptr_t** ret_sp, intptr_t** ret_fp) {
342
343 ExtendedPC epc;
344 CONTEXT* uc = (CONTEXT*)ucVoid;
345
346 if (uc != NULL) {
347 epc = ExtendedPC((address)uc->REG_PC);
348 if (ret_sp) *ret_sp = (intptr_t*)uc->REG_SP;
349 if (ret_fp) *ret_fp = (intptr_t*)uc->REG_FP;
350 } else {
351 // construct empty ExtendedPC for return value checking
352 epc = ExtendedPC(NULL);
353 if (ret_sp) *ret_sp = (intptr_t *)NULL;
354 if (ret_fp) *ret_fp = (intptr_t *)NULL;
355 }
356
357 return epc;
358 }
359
360 frame os::fetch_frame_from_context(void* ucVoid) {
361 intptr_t* sp;
362 intptr_t* fp;
363 ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
364 return frame(sp, fp, epc.pc());
365 }
366
367 // VC++ does not save frame pointer on stack in optimized build. It
368 // can be turned off by /Oy-. If we really want to walk C frames,
369 // we can use the StackWalk() API.
370 frame os::get_sender_for_C_frame(frame* fr) {
371 return frame(fr->sender_sp(), fr->link(), fr->sender_pc());
372 }
373
374
375 #ifndef AMD64
376 intptr_t* _get_previous_fp() {
377 intptr_t **frameptr;
378 __asm {
379 mov frameptr, ebp
380 };
381 return *frameptr;
382 }
383 #endif // !AMD64
384
385 frame os::current_frame() {
386
387 #ifdef AMD64
388 // apparently _asm not supported on windows amd64
389 typedef intptr_t* get_fp_func ();
390 get_fp_func* func = CAST_TO_FN_PTR(get_fp_func*,
391 StubRoutines::x86::get_previous_fp_entry());
392 if (func == NULL) return frame(NULL, NULL, NULL);
393 intptr_t* fp = (*func)();
394 #else
395 intptr_t* fp = _get_previous_fp();
396 #endif // AMD64
397
398 frame myframe((intptr_t*)os::current_stack_pointer(),
399 (intptr_t*)fp,
400 CAST_FROM_FN_PTR(address, os::current_frame));
401 if (os::is_first_C_frame(&myframe)) {
402 // stack is not walkable
403 return frame(NULL, NULL, NULL);
404 } else {
405 return os::get_sender_for_C_frame(&myframe);
406 }
407 }
408
409 void os::print_context(outputStream *st, void *context) {
410 if (context == NULL) return;
411
412 CONTEXT* uc = (CONTEXT*)context;
413
414 st->print_cr("Registers:");
415 #ifdef AMD64
416 st->print( "RAX=" INTPTR_FORMAT, uc->Rax);
417 st->print(", RBX=" INTPTR_FORMAT, uc->Rbx);
418 st->print(", RCX=" INTPTR_FORMAT, uc->Rcx);
419 st->print(", RDX=" INTPTR_FORMAT, uc->Rdx);
420 st->cr();
421 st->print( "RSP=" INTPTR_FORMAT, uc->Rsp);
422 st->print(", RBP=" INTPTR_FORMAT, uc->Rbp);
423 st->print(", RSI=" INTPTR_FORMAT, uc->Rsi);
424 st->print(", RDI=" INTPTR_FORMAT, uc->Rdi);
425 st->cr();
426 st->print( "R8=" INTPTR_FORMAT, uc->R8);
427 st->print(", R9=" INTPTR_FORMAT, uc->R9);
428 st->print(", R10=" INTPTR_FORMAT, uc->R10);
429 st->print(", R11=" INTPTR_FORMAT, uc->R11);
430 st->cr();
431 st->print( "R12=" INTPTR_FORMAT, uc->R12);
432 st->print(", R13=" INTPTR_FORMAT, uc->R13);
433 st->print(", R14=" INTPTR_FORMAT, uc->R14);
434 st->print(", R15=" INTPTR_FORMAT, uc->R15);
435 st->cr();
436 st->print( "RIP=" INTPTR_FORMAT, uc->Rip);
437 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags);
438
439 st->cr();
440 st->cr();
441
442 st->print_cr("Register to memory mapping:");
443 st->cr();
444
445 // this is only for the "general purpose" registers
446
447 st->print_cr("RAX=" INTPTR_FORMAT, uc->Rax);
448 print_location(st, uc->Rax);
449 st->cr();
450 st->print_cr("RBX=" INTPTR_FORMAT, uc->Rbx);
451 print_location(st, uc->Rbx);
452 st->cr();
453 st->print_cr("RCX=" INTPTR_FORMAT, uc->Rcx);
454 print_location(st, uc->Rcx);
455 st->cr();
456 st->print_cr("RDX=" INTPTR_FORMAT, uc->Rdx);
457 print_location(st, uc->Rdx);
458 st->cr();
459 st->print_cr("RSP=" INTPTR_FORMAT, uc->Rsp);
460 print_location(st, uc->Rsp);
461 st->cr();
462 st->print_cr("RBP=" INTPTR_FORMAT, uc->Rbp);
463 print_location(st, uc->Rbp);
464 st->cr();
465 st->print_cr("RSI=" INTPTR_FORMAT, uc->Rsi);
466 print_location(st, uc->Rsi);
467 st->cr();
468 st->print_cr("RDI=" INTPTR_FORMAT, uc->Rdi);
469 print_location(st, uc->Rdi);
470 st->cr();
471 st->print_cr("R8 =" INTPTR_FORMAT, uc->R8);
472 print_location(st, uc->R8);
473 st->cr();
474 st->print_cr("R9 =" INTPTR_FORMAT, uc->R9);
475 print_location(st, uc->R9);
476 st->cr();
477 st->print_cr("R10=" INTPTR_FORMAT, uc->R10);
478 print_location(st, uc->R10);
479 st->cr();
480 st->print_cr("R11=" INTPTR_FORMAT, uc->R11);
481 print_location(st, uc->R11);
482 st->cr();
483 st->print_cr("R12=" INTPTR_FORMAT, uc->R12);
484 print_location(st, uc->R12);
485 st->cr();
486 st->print_cr("R13=" INTPTR_FORMAT, uc->R13);
487 print_location(st, uc->R13);
488 st->cr();
489 st->print_cr("R14=" INTPTR_FORMAT, uc->R14);
490 print_location(st, uc->R14);
491 st->cr();
492 st->print_cr("R15=" INTPTR_FORMAT, uc->R15);
493 print_location(st, uc->R15);
494 #else
495 st->print( "EAX=" INTPTR_FORMAT, uc->Eax);
496 st->print(", EBX=" INTPTR_FORMAT, uc->Ebx);
497 st->print(", ECX=" INTPTR_FORMAT, uc->Ecx);
498 st->print(", EDX=" INTPTR_FORMAT, uc->Edx);
499 st->cr();
500 st->print( "ESP=" INTPTR_FORMAT, uc->Esp);
501 st->print(", EBP=" INTPTR_FORMAT, uc->Ebp);
502 st->print(", ESI=" INTPTR_FORMAT, uc->Esi);
503 st->print(", EDI=" INTPTR_FORMAT, uc->Edi);
504 st->cr();
505 st->print( "EIP=" INTPTR_FORMAT, uc->Eip);
506 st->print(", EFLAGS=" INTPTR_FORMAT, uc->EFlags);
507
508 st->cr();
509 st->cr();
510
511 st->print_cr("Register to memory mapping:");
512 st->cr();
513
514 // this is only for the "general purpose" registers
515
516 st->print_cr("EAX=" INTPTR_FORMAT, uc->Eax);
517 print_location(st, uc->Eax);
518 st->cr();
519 st->print_cr("EBX=" INTPTR_FORMAT, uc->Ebx);
520 print_location(st, uc->Ebx);
521 st->cr();
522 st->print_cr("ECX=" INTPTR_FORMAT, uc->Ecx);
523 print_location(st, uc->Ecx);
524 st->cr();
525 st->print_cr("EDX=" INTPTR_FORMAT, uc->Edx);
526 print_location(st, uc->Edx);
527 st->cr();
528 st->print_cr("ESP=" INTPTR_FORMAT, uc->Esp);
529 print_location(st, uc->Esp);
530 st->cr();
531 st->print_cr("EBP=" INTPTR_FORMAT, uc->Ebp);
532 print_location(st, uc->Ebp);
533 st->cr();
534 st->print_cr("ESI=" INTPTR_FORMAT, uc->Esi);
535 print_location(st, uc->Esi);
536 st->cr();
537 st->print_cr("EDI=" INTPTR_FORMAT, uc->Edi);
538 print_location(st, uc->Edi);
539 #endif // AMD64
540 st->cr();
541 st->cr();
542
543 intptr_t *sp = (intptr_t *)uc->REG_SP;
544 st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
545 print_hex_dump(st, (address)sp, (address)(sp + 32), sizeof(intptr_t));
546 st->cr();
547
548 // Note: it may be unsafe to inspect memory near pc. For example, pc may
549 // point to garbage if entry point in an nmethod is corrupted. Leave
550 // this at the end, and hope for the best.
551 address pc = (address)uc->REG_PC;
552 st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
553 print_hex_dump(st, pc - 16, pc + 16, sizeof(char));
554 st->cr();
555 }
556
557 extern "C" int SafeFetch32 (int * adr, int Err) {
558 int rv = Err ;
559 _try {
560 rv = *((volatile int *) adr) ;
561 } __except(EXCEPTION_EXECUTE_HANDLER) {
562 }
563 return rv ;
564 }
565
566 extern "C" intptr_t SafeFetchN (intptr_t * adr, intptr_t Err) {
567 intptr_t rv = Err ;
568 _try {
569 rv = *((volatile intptr_t *) adr) ;
570 } __except(EXCEPTION_EXECUTE_HANDLER) {
571 }
572 return rv ;
573 }
574
575 extern "C" int SpinPause () {
576 #ifdef AMD64
577 return 0 ;
578 #else
579 // pause == rep:nop
580 // On systems that don't support pause a rep:nop
581 // is executed as a nop. The rep: prefix is ignored.
582 _asm {
583 pause ;
584 };
585 return 1 ;
586 #endif // AMD64
587 }
588
589
590 void os::setup_fpu() {
591 #ifndef AMD64
592 int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std();
593 __asm fldcw fpu_cntrl_word;
594 #endif // !AMD64
595 }