1 /*
2 * Copyright (c) 1997, 2014, 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 #include "precompiled.hpp"
26 #include "compiler/abstractCompiler.hpp"
27 #include "compiler/disassembler.hpp"
28 #include "gc_interface/collectedHeap.inline.hpp"
29 #include "interpreter/interpreter.hpp"
30 #include "interpreter/oopMapCache.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "memory/universe.inline.hpp"
33 #include "oops/markOop.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "oops/oop.inline2.hpp"
38 #include "prims/methodHandles.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/javaCalls.hpp"
42 #include "runtime/monitorChunk.hpp"
43 #include "runtime/sharedRuntime.hpp"
44 #include "runtime/signature.hpp"
45 #include "runtime/stubCodeGenerator.hpp"
46 #include "runtime/stubRoutines.hpp"
47 #include "utilities/decoder.hpp"
48
49 #ifdef TARGET_ARCH_x86
50 # include "nativeInst_x86.hpp"
51 #endif
52 #ifdef TARGET_ARCH_sparc
53 # include "nativeInst_sparc.hpp"
54 #endif
55 #ifdef TARGET_ARCH_zero
56 # include "nativeInst_zero.hpp"
57 #endif
58 #ifdef TARGET_ARCH_arm
59 # include "nativeInst_arm.hpp"
60 #endif
61 #ifdef TARGET_ARCH_ppc
62 # include "nativeInst_ppc.hpp"
63 #endif
64
65 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
66
67 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) {
68 _thread = thread;
69 _update_map = update_map;
70 clear();
71 debug_only(_update_for_id = NULL;)
72 #ifndef PRODUCT
73 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL;
74 #endif /* PRODUCT */
75 }
76
77 RegisterMap::RegisterMap(const RegisterMap* map) {
78 assert(map != this, "bad initialization parameter");
79 assert(map != NULL, "RegisterMap must be present");
80 _thread = map->thread();
81 _update_map = map->update_map();
82 _include_argument_oops = map->include_argument_oops();
83 debug_only(_update_for_id = map->_update_for_id;)
84 pd_initialize_from(map);
85 if (update_map()) {
86 for(int i = 0; i < location_valid_size; i++) {
87 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i];
88 _location_valid[i] = bits;
89 // for whichever bits are set, pull in the corresponding map->_location
90 int j = i*location_valid_type_size;
91 while (bits != 0) {
92 if ((bits & 1) != 0) {
93 assert(0 <= j && j < reg_count, "range check");
94 _location[j] = map->_location[j];
95 }
96 bits >>= 1;
97 j += 1;
98 }
99 }
100 }
101 }
102
103 void RegisterMap::clear() {
104 set_include_argument_oops(true);
105 if (_update_map) {
106 for(int i = 0; i < location_valid_size; i++) {
107 _location_valid[i] = 0;
108 }
109 pd_clear();
110 } else {
111 pd_initialize();
112 }
113 }
114
115 #ifndef PRODUCT
116
117 void RegisterMap::print_on(outputStream* st) const {
118 st->print_cr("Register map");
119 for(int i = 0; i < reg_count; i++) {
120
121 VMReg r = VMRegImpl::as_VMReg(i);
122 intptr_t* src = (intptr_t*) location(r);
123 if (src != NULL) {
124
125 r->print_on(st);
126 st->print(" [" INTPTR_FORMAT "] = ", src);
127 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) {
128 st->print_cr("<misaligned>");
129 } else {
130 st->print_cr(INTPTR_FORMAT, *src);
131 }
132 }
133 }
134 }
135
136 void RegisterMap::print() const {
137 print_on(tty);
138 }
139
140 #endif
141 // This returns the pc that if you were in the debugger you'd see. Not
142 // the idealized value in the frame object. This undoes the magic conversion
143 // that happens for deoptimized frames. In addition it makes the value the
144 // hardware would want to see in the native frame. The only user (at this point)
145 // is deoptimization. It likely no one else should ever use it.
146
147 address frame::raw_pc(Thread* thread) const {
148 // On Intel the return_address is always the word on the stack
149 address ret_pc = *(address*)(sp() - 1);
150 if (SharedRuntime::is_memento_stack_trace_return_handler(ret_pc)) {
151 assert(thread->memento_original_return_address() != NULL, "memento original return address must be set if patched");
152 return ret_pc;
153 } else {
154 if (is_deoptimized_frame()) {
155 nmethod* nm = cb()->as_nmethod_or_null();
156 if (nm->is_method_handle_return(pc()))
157 return nm->deopt_mh_handler_begin() - pc_return_offset;
158 else
159 return nm->deopt_handler_begin() - pc_return_offset;
160 } else {
161 return (pc() - pc_return_offset);
162 }
163 }
164 }
165
166 // Change the pc in a frame object. This does not change the actual pc in
167 // actual frame. To do that use patch_pc.
168 //
169 void frame::set_pc(Thread* thread, address newpc) {
170 #ifdef ASSERT
171 if (_cb != NULL && _cb->is_nmethod()) {
172 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation");
173 }
174 #endif // ASSERT
175
176 if (SharedRuntime::is_memento_stack_trace_return_handler(newpc)) {
177 newpc = thread->memento_original_return_address();
178 assert(newpc != NULL, "memento original return address must be set if patched");
179 }
180
181 // Unsafe to use the is_deoptimzed tester after changing pc
182 _deopt_state = unknown;
183 _pc = newpc;
184 _cb = CodeCache::find_blob_unsafe(_pc);
185
186 }
187
188 // type testers
189 bool frame::is_ignored_frame() const {
190 return false; // FIXME: some LambdaForm frames should be ignored
191 }
192 bool frame::is_deoptimized_frame() const {
193 assert(_deopt_state != unknown, "not answerable");
194 return _deopt_state == is_deoptimized;
195 }
196
197 bool frame::is_native_frame() const {
198 return (_cb != NULL &&
199 _cb->is_nmethod() &&
200 ((nmethod*)_cb)->is_native_method());
201 }
202
203 bool frame::is_java_frame() const {
204 if (is_interpreted_frame()) return true;
205 if (is_compiled_frame()) return true;
206 return false;
207 }
208
209
210 bool frame::is_compiled_frame() const {
211 if (_cb != NULL &&
212 _cb->is_nmethod() &&
213 ((nmethod*)_cb)->is_java_method()) {
214 return true;
215 }
216 return false;
217 }
218
219
220 bool frame::is_runtime_frame() const {
221 return (_cb != NULL && _cb->is_runtime_stub());
222 }
223
224 bool frame::is_safepoint_blob_frame() const {
225 return (_cb != NULL && _cb->is_safepoint_stub());
226 }
227
228 // testers
229
230 bool frame::is_first_java_frame() const {
231 RegisterMap map(JavaThread::current(), false); // No update
232 frame s;
233 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map));
234 return s.is_first_frame();
235 }
236
237
238 bool frame::entry_frame_is_first() const {
239 return entry_frame_call_wrapper()->is_first_frame();
240 }
241
242 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const {
243 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr();
244 address addr = (address) jcw;
245
246 // addr must be within the usable part of the stack
247 if (thread->is_in_usable_stack(addr)) {
248 return *jcw;
249 }
250
251 return NULL;
252 }
253
254 bool frame::should_be_deoptimized() const {
255 if (_deopt_state == is_deoptimized ||
256 !is_compiled_frame() ) return false;
257 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
258 nmethod* nm = (nmethod *)_cb;
259 if (TraceDependencies) {
260 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
261 nm->print_value_on(tty);
262 tty->cr();
263 }
264
265 if( !nm->is_marked_for_deoptimization() )
266 return false;
267
268 // If at the return point, then the frame has already been popped, and
269 // only the return needs to be executed. Don't deoptimize here.
270 return !nm->is_at_poll_return(pc());
271 }
272
273 bool frame::can_be_deoptimized() const {
274 if (!is_compiled_frame()) return false;
275 nmethod* nm = (nmethod*)_cb;
276
277 if( !nm->can_be_deoptimized() )
278 return false;
279
280 return !nm->is_at_poll_return(pc());
281 }
282
283 void frame::deoptimize(JavaThread* thread) {
284 // Schedule deoptimization of an nmethod activation with this frame.
285 assert(_cb != NULL && _cb->is_nmethod(), "must be");
286 nmethod* nm = (nmethod*)_cb;
287
288 // This is a fix for register window patching race
289 if (NeedsDeoptSuspend && Thread::current() != thread) {
290 assert(SafepointSynchronize::is_at_safepoint(),
291 "patching other threads for deopt may only occur at a safepoint");
292
293 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that
294 // we could see the frame again and ask for it to be deoptimized since
295 // it might move for a long time. That is harmless and we just ignore it.
296 if (id() == thread->must_deopt_id()) {
297 assert(thread->is_deopt_suspend(), "lost suspension");
298 return;
299 }
300
301 // We are at a safepoint so the target thread can only be
302 // in 4 states:
303 // blocked - no problem
304 // blocked_trans - no problem (i.e. could have woken up from blocked
305 // during a safepoint).
306 // native - register window pc patching race
307 // native_trans - momentary state
308 //
309 // We could just wait out a thread in native_trans to block.
310 // Then we'd have all the issues that the safepoint code has as to
311 // whether to spin or block. It isn't worth it. Just treat it like
312 // native and be done with it.
313 //
314 // Examine the state of the thread at the start of safepoint since
315 // threads that were in native at the start of the safepoint could
316 // come to a halt during the safepoint, changing the current value
317 // of the safepoint_state.
318 JavaThreadState state = thread->safepoint_state()->orig_thread_state();
319 if (state == _thread_in_native || state == _thread_in_native_trans) {
320 // Since we are at a safepoint the target thread will stop itself
321 // before it can return to java as long as we remain at the safepoint.
322 // Therefore we can put an additional request for the thread to stop
323 // no matter what no (like a suspend). This will cause the thread
324 // to notice it needs to do the deopt on its own once it leaves native.
325 //
326 // The only reason we must do this is because on machine with register
327 // windows we have a race with patching the return address and the
328 // window coming live as the thread returns to the Java code (but still
329 // in native mode) and then blocks. It is only this top most frame
330 // that is at risk. So in truth we could add an additional check to
331 // see if this frame is one that is at risk.
332 RegisterMap map(thread, false);
333 frame at_risk = thread->last_frame().sender(&map);
334 if (id() == at_risk.id()) {
335 thread->set_must_deopt_id(id());
336 thread->set_deopt_suspend();
337 return;
338 }
339 }
340 } // NeedsDeoptSuspend
341
342
343 // If the call site is a MethodHandle call site use the MH deopt
344 // handler.
345 address deopt = nm->is_method_handle_return(pc()) ?
346 nm->deopt_mh_handler_begin() :
347 nm->deopt_handler_begin();
348
349 // Save the original pc before we patch in the new one
350 nm->set_original_pc(this, pc());
351 patch_pc(thread, deopt);
352
353 #ifdef ASSERT
354 {
355 RegisterMap map(thread, false);
356 frame check = thread->last_frame();
357 while (id() != check.id()) {
358 check = check.sender(&map);
359 }
360 assert(check.is_deoptimized_frame(), "missed deopt");
361 }
362 #endif // ASSERT
363 }
364
365 frame frame::java_sender() const {
366 RegisterMap map(JavaThread::current(), false);
367 frame s;
368 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ;
369 guarantee(s.is_java_frame(), "tried to get caller of first java frame");
370 return s;
371 }
372
373 frame frame::real_sender(RegisterMap* map) const {
374 frame result = sender(map);
375 while (result.is_runtime_frame() ||
376 result.is_ignored_frame()) {
377 result = result.sender(map);
378 }
379 return result;
380 }
381
382 // Note: called by profiler - NOT for current thread
383 frame frame::profile_find_Java_sender_frame(JavaThread *thread) {
384 // If we don't recognize this frame, walk back up the stack until we do
385 RegisterMap map(thread, false);
386 frame first_java_frame = frame();
387
388 // Find the first Java frame on the stack starting with input frame
389 if (is_java_frame()) {
390 // top frame is compiled frame or deoptimized frame
391 first_java_frame = *this;
392 } else if (safe_for_sender(thread)) {
393 for (frame sender_frame = sender(&map);
394 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame();
395 sender_frame = sender_frame.sender(&map)) {
396 if (sender_frame.is_java_frame()) {
397 first_java_frame = sender_frame;
398 break;
399 }
400 }
401 }
402 return first_java_frame;
403 }
404
405 // Interpreter frames
406
407
408 void frame::interpreter_frame_set_locals(intptr_t* locs) {
409 assert(is_interpreted_frame(), "Not an interpreted frame");
410 *interpreter_frame_locals_addr() = locs;
411 }
412
413 Method* frame::interpreter_frame_method() const {
414 assert(is_interpreted_frame(), "interpreted frame expected");
415 Method* m = *interpreter_frame_method_addr();
416 assert(m->is_method(), "not a Method*");
417 return m;
418 }
419
420 void frame::interpreter_frame_set_method(Method* method) {
421 assert(is_interpreted_frame(), "interpreted frame expected");
422 *interpreter_frame_method_addr() = method;
423 }
424
425 void frame::interpreter_frame_set_bcx(intptr_t bcx) {
426 assert(is_interpreted_frame(), "Not an interpreted frame");
427 if (ProfileInterpreter) {
428 bool formerly_bci = is_bci(interpreter_frame_bcx());
429 bool is_now_bci = is_bci(bcx);
430 *interpreter_frame_bcx_addr() = bcx;
431
432 intptr_t mdx = interpreter_frame_mdx();
433
434 if (mdx != 0) {
435 if (formerly_bci) {
436 if (!is_now_bci) {
437 // The bcx was just converted from bci to bcp.
438 // Convert the mdx in parallel.
439 MethodData* mdo = interpreter_frame_method()->method_data();
440 assert(mdo != NULL, "");
441 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one.
442 address mdp = mdo->di_to_dp(mdi);
443 interpreter_frame_set_mdx((intptr_t)mdp);
444 }
445 } else {
446 if (is_now_bci) {
447 // The bcx was just converted from bcp to bci.
448 // Convert the mdx in parallel.
449 MethodData* mdo = interpreter_frame_method()->method_data();
450 assert(mdo != NULL, "");
451 int mdi = mdo->dp_to_di((address)mdx);
452 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0.
453 }
454 }
455 }
456 } else {
457 *interpreter_frame_bcx_addr() = bcx;
458 }
459 }
460
461 jint frame::interpreter_frame_bci() const {
462 assert(is_interpreted_frame(), "interpreted frame expected");
463 intptr_t bcx = interpreter_frame_bcx();
464 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx);
465 }
466
467 void frame::interpreter_frame_set_bci(jint bci) {
468 assert(is_interpreted_frame(), "interpreted frame expected");
469 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC");
470 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci));
471 }
472
473 address frame::interpreter_frame_bcp() const {
474 assert(is_interpreted_frame(), "interpreted frame expected");
475 intptr_t bcx = interpreter_frame_bcx();
476 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx;
477 }
478
479 void frame::interpreter_frame_set_bcp(address bcp) {
480 assert(is_interpreted_frame(), "interpreted frame expected");
481 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC");
482 interpreter_frame_set_bcx((intptr_t)bcp);
483 }
484
485 void frame::interpreter_frame_set_mdx(intptr_t mdx) {
486 assert(is_interpreted_frame(), "Not an interpreted frame");
487 assert(ProfileInterpreter, "must be profiling interpreter");
488 *interpreter_frame_mdx_addr() = mdx;
489 }
490
491 address frame::interpreter_frame_mdp() const {
492 assert(ProfileInterpreter, "must be profiling interpreter");
493 assert(is_interpreted_frame(), "interpreted frame expected");
494 intptr_t bcx = interpreter_frame_bcx();
495 intptr_t mdx = interpreter_frame_mdx();
496
497 assert(!is_bci(bcx), "should not access mdp during GC");
498 return (address)mdx;
499 }
500
501 void frame::interpreter_frame_set_mdp(address mdp) {
502 assert(is_interpreted_frame(), "interpreted frame expected");
503 if (mdp == NULL) {
504 // Always allow the mdp to be cleared.
505 interpreter_frame_set_mdx((intptr_t)mdp);
506 }
507 intptr_t bcx = interpreter_frame_bcx();
508 assert(!is_bci(bcx), "should not set mdp during GC");
509 interpreter_frame_set_mdx((intptr_t)mdp);
510 }
511
512 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const {
513 assert(is_interpreted_frame(), "Not an interpreted frame");
514 #ifdef ASSERT
515 interpreter_frame_verify_monitor(current);
516 #endif
517 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size());
518 return next;
519 }
520
521 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const {
522 assert(is_interpreted_frame(), "Not an interpreted frame");
523 #ifdef ASSERT
524 // // This verification needs to be checked before being enabled
525 // interpreter_frame_verify_monitor(current);
526 #endif
527 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size());
528 return previous;
529 }
530
531 // Interpreter locals and expression stack locations.
532
533 intptr_t* frame::interpreter_frame_local_at(int index) const {
534 const int n = Interpreter::local_offset_in_bytes(index)/wordSize;
535 return &((*interpreter_frame_locals_addr())[n]);
536 }
537
538 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const {
539 const int i = offset * interpreter_frame_expression_stack_direction();
540 const int n = i * Interpreter::stackElementWords;
541 return &(interpreter_frame_expression_stack()[n]);
542 }
543
544 jint frame::interpreter_frame_expression_stack_size() const {
545 // Number of elements on the interpreter expression stack
546 // Callers should span by stackElementWords
547 int element_size = Interpreter::stackElementWords;
548 size_t stack_size = 0;
549 if (frame::interpreter_frame_expression_stack_direction() < 0) {
550 stack_size = (interpreter_frame_expression_stack() -
551 interpreter_frame_tos_address() + 1)/element_size;
552 } else {
553 stack_size = (interpreter_frame_tos_address() -
554 interpreter_frame_expression_stack() + 1)/element_size;
555 }
556 assert( stack_size <= (size_t)max_jint, "stack size too big");
557 return ((jint)stack_size);
558 }
559
560
561 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp)
562
563 const char* frame::print_name() const {
564 if (is_native_frame()) return "Native";
565 if (is_interpreted_frame()) return "Interpreted";
566 if (is_compiled_frame()) {
567 if (is_deoptimized_frame()) return "Deoptimized";
568 return "Compiled";
569 }
570 if (sp() == NULL) return "Empty";
571 return "C";
572 }
573
574 void frame::print_value_on(outputStream* st, JavaThread *thread) const {
575 NOT_PRODUCT(address begin = pc()-40;)
576 NOT_PRODUCT(address end = NULL;)
577
578 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp());
579 if (sp() != NULL)
580 st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), real_fp(), pc());
581
582 if (StubRoutines::contains(pc())) {
583 st->print_cr(")");
584 st->print("(");
585 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
586 st->print("~Stub::%s", desc->name());
587 NOT_PRODUCT(begin = desc->begin(); end = desc->end();)
588 } else if (Interpreter::contains(pc())) {
589 st->print_cr(")");
590 st->print("(");
591 InterpreterCodelet* desc = Interpreter::codelet_containing(pc());
592 if (desc != NULL) {
593 st->print("~");
594 desc->print_on(st);
595 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();)
596 } else {
597 st->print("~interpreter");
598 }
599 }
600 st->print_cr(")");
601
602 if (_cb != NULL) {
603 st->print(" ");
604 _cb->print_value_on(st);
605 st->cr();
606 #ifndef PRODUCT
607 if (end == NULL) {
608 begin = _cb->code_begin();
609 end = _cb->code_end();
610 }
611 #endif
612 }
613 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);)
614 }
615
616
617 void frame::print_on(outputStream* st) const {
618 print_value_on(st,NULL);
619 if (is_interpreted_frame()) {
620 interpreter_frame_print_on(st);
621 }
622 }
623
624
625 void frame::interpreter_frame_print_on(outputStream* st) const {
626 #ifndef PRODUCT
627 assert(is_interpreted_frame(), "Not an interpreted frame");
628 jint i;
629 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) {
630 intptr_t x = *interpreter_frame_local_at(i);
631 st->print(" - local [" INTPTR_FORMAT "]", x);
632 st->fill_to(23);
633 st->print_cr("; #%d", i);
634 }
635 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) {
636 intptr_t x = *interpreter_frame_expression_stack_at(i);
637 st->print(" - stack [" INTPTR_FORMAT "]", x);
638 st->fill_to(23);
639 st->print_cr("; #%d", i);
640 }
641 // locks for synchronization
642 for (BasicObjectLock* current = interpreter_frame_monitor_end();
643 current < interpreter_frame_monitor_begin();
644 current = next_monitor_in_interpreter_frame(current)) {
645 st->print(" - obj [");
646 current->obj()->print_value_on(st);
647 st->print_cr("]");
648 st->print(" - lock [");
649 current->lock()->print_on(st);
650 st->print_cr("]");
651 }
652 // monitor
653 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin());
654 // bcp
655 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp());
656 st->fill_to(23);
657 st->print_cr("; @%d", interpreter_frame_bci());
658 // locals
659 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0));
660 // method
661 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method());
662 st->fill_to(23);
663 st->print("; ");
664 interpreter_frame_method()->print_name(st);
665 st->cr();
666 #endif
667 }
668
669 // Return whether the frame is in the VM or os indicating a Hotspot problem.
670 // Otherwise, it's likely a bug in the native library that the Java code calls,
671 // hopefully indicating where to submit bugs.
672 void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) {
673 // C/C++ frame
674 bool in_vm = os::address_is_in_vm(pc);
675 st->print(in_vm ? "V" : "C");
676
677 int offset;
678 bool found;
679
680 // libname
681 found = os::dll_address_to_library_name(pc, buf, buflen, &offset);
682 if (found) {
683 // skip directory names
684 const char *p1, *p2;
685 p1 = buf;
686 int len = (int)strlen(os::file_separator());
687 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
688 st->print(" [%s+0x%x]", p1, offset);
689 } else {
690 st->print(" " PTR_FORMAT, pc);
691 }
692
693 // function name - os::dll_address_to_function_name() may return confusing
694 // names if pc is within jvm.dll or libjvm.so, because JVM only has
695 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this
696 // only for native libraries.
697 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) {
698 found = os::dll_address_to_function_name(pc, buf, buflen, &offset);
699
700 if (found) {
701 st->print(" %s+0x%x", buf, offset);
702 }
703 }
704 }
705
706 // frame::print_on_error() is called by fatal error handler. Notice that we may
707 // crash inside this function if stack frame is corrupted. The fatal error
708 // handler can catch and handle the crash. Here we assume the frame is valid.
709 //
710 // First letter indicates type of the frame:
711 // J: Java frame (compiled)
712 // j: Java frame (interpreted)
713 // V: VM frame (C/C++)
714 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.)
715 // C: C/C++ frame
716 //
717 // We don't need detailed frame type as that in frame::print_name(). "C"
718 // suggests the problem is in user lib; everything else is likely a VM bug.
719
720 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const {
721 if (_cb != NULL) {
722 if (Interpreter::contains(pc())) {
723 Method* m = this->interpreter_frame_method();
724 if (m != NULL) {
725 m->name_and_sig_as_C_string(buf, buflen);
726 st->print("j %s", buf);
727 st->print("+%d", this->interpreter_frame_bci());
728 } else {
729 st->print("j " PTR_FORMAT, pc());
730 }
731 } else if (StubRoutines::contains(pc())) {
732 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
733 if (desc != NULL) {
734 st->print("v ~StubRoutines::%s", desc->name());
735 } else {
736 st->print("v ~StubRoutines::" PTR_FORMAT, pc());
737 }
738 } else if (_cb->is_buffer_blob()) {
739 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name());
740 } else if (_cb->is_nmethod()) {
741 nmethod* nm = (nmethod*)_cb;
742 Method* m = nm->method();
743 if (m != NULL) {
744 m->name_and_sig_as_C_string(buf, buflen);
745 st->print("J %d%s %s %s (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+0x%x]",
746 nm->compile_id(), (nm->is_osr_method() ? "%" : ""),
747 ((nm->compiler() != NULL) ? nm->compiler()->name() : ""),
748 buf, m->code_size(), _pc, _cb->code_begin(), _pc - _cb->code_begin());
749 } else {
750 st->print("J " PTR_FORMAT, pc());
751 }
752 } else if (_cb->is_runtime_stub()) {
753 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name());
754 } else if (_cb->is_deoptimization_stub()) {
755 st->print("v ~DeoptimizationBlob");
756 } else if (_cb->is_exception_stub()) {
757 st->print("v ~ExceptionBlob");
758 } else if (_cb->is_safepoint_stub()) {
759 st->print("v ~SafepointBlob");
760 } else {
761 st->print("v blob " PTR_FORMAT, pc());
762 }
763 } else {
764 print_C_frame(st, buf, buflen, pc());
765 }
766 }
767
768
769 /*
770 The interpreter_frame_expression_stack_at method in the case of SPARC needs the
771 max_stack value of the method in order to compute the expression stack address.
772 It uses the Method* in order to get the max_stack value but during GC this
773 Method* value saved on the frame is changed by reverse_and_push and hence cannot
774 be used. So we save the max_stack value in the FrameClosure object and pass it
775 down to the interpreter_frame_expression_stack_at method
776 */
777 class InterpreterFrameClosure : public OffsetClosure {
778 private:
779 frame* _fr;
780 OopClosure* _f;
781 int _max_locals;
782 int _max_stack;
783
784 public:
785 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack,
786 OopClosure* f) {
787 _fr = fr;
788 _max_locals = max_locals;
789 _max_stack = max_stack;
790 _f = f;
791 }
792
793 void offset_do(int offset) {
794 oop* addr;
795 if (offset < _max_locals) {
796 addr = (oop*) _fr->interpreter_frame_local_at(offset);
797 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame");
798 _f->do_oop(addr);
799 } else {
800 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals));
801 // In case of exceptions, the expression stack is invalid and the esp will be reset to express
802 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel).
803 bool in_stack;
804 if (frame::interpreter_frame_expression_stack_direction() > 0) {
805 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address();
806 } else {
807 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address();
808 }
809 if (in_stack) {
810 _f->do_oop(addr);
811 }
812 }
813 }
814
815 int max_locals() { return _max_locals; }
816 frame* fr() { return _fr; }
817 };
818
819
820 class InterpretedArgumentOopFinder: public SignatureInfo {
821 private:
822 OopClosure* _f; // Closure to invoke
823 int _offset; // TOS-relative offset, decremented with each argument
824 bool _has_receiver; // true if the callee has a receiver
825 frame* _fr;
826
827 void set(int size, BasicType type) {
828 _offset -= size;
829 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do();
830 }
831
832 void oop_offset_do() {
833 oop* addr;
834 addr = (oop*)_fr->interpreter_frame_tos_at(_offset);
835 _f->do_oop(addr);
836 }
837
838 public:
839 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) {
840 // compute size of arguments
841 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
842 assert(!fr->is_interpreted_frame() ||
843 args_size <= fr->interpreter_frame_expression_stack_size(),
844 "args cannot be on stack anymore");
845 // initialize InterpretedArgumentOopFinder
846 _f = f;
847 _fr = fr;
848 _offset = args_size;
849 }
850
851 void oops_do() {
852 if (_has_receiver) {
853 --_offset;
854 oop_offset_do();
855 }
856 iterate_parameters();
857 }
858 };
859
860
861 // Entry frame has following form (n arguments)
862 // +-----------+
863 // sp -> | last arg |
864 // +-----------+
865 // : ::: :
866 // +-----------+
867 // (sp+n)->| first arg|
868 // +-----------+
869
870
871
872 // visits and GC's all the arguments in entry frame
873 class EntryFrameOopFinder: public SignatureInfo {
874 private:
875 bool _is_static;
876 int _offset;
877 frame* _fr;
878 OopClosure* _f;
879
880 void set(int size, BasicType type) {
881 assert (_offset >= 0, "illegal offset");
882 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset);
883 _offset -= size;
884 }
885
886 void oop_at_offset_do(int offset) {
887 assert (offset >= 0, "illegal offset");
888 oop* addr = (oop*) _fr->entry_frame_argument_at(offset);
889 _f->do_oop(addr);
890 }
891
892 public:
893 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) {
894 _f = NULL; // will be set later
895 _fr = frame;
896 _is_static = is_static;
897 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0
898 }
899
900 void arguments_do(OopClosure* f) {
901 _f = f;
902 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver
903 iterate_parameters();
904 }
905
906 };
907
908 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) {
909 ArgumentSizeComputer asc(signature);
910 int size = asc.size();
911 return (oop *)interpreter_frame_tos_at(size);
912 }
913
914
915 void frame::oops_interpreted_do(OopClosure* f, CLDClosure* cld_f,
916 const RegisterMap* map, bool query_oop_map_cache) {
917 assert(is_interpreted_frame(), "Not an interpreted frame");
918 assert(map != NULL, "map must be set");
919 Thread *thread = Thread::current();
920 methodHandle m (thread, interpreter_frame_method());
921 jint bci = interpreter_frame_bci();
922
923 assert(!Universe::heap()->is_in(m()),
924 "must be valid oop");
925 assert(m->is_method(), "checking frame value");
926 assert((m->is_native() && bci == 0) ||
927 (!m->is_native() && bci >= 0 && bci < m->code_size()),
928 "invalid bci value");
929
930 // Handle the monitor elements in the activation
931 for (
932 BasicObjectLock* current = interpreter_frame_monitor_end();
933 current < interpreter_frame_monitor_begin();
934 current = next_monitor_in_interpreter_frame(current)
935 ) {
936 #ifdef ASSERT
937 interpreter_frame_verify_monitor(current);
938 #endif
939 current->oops_do(f);
940 }
941
942 // process fixed part
943 if (cld_f != NULL) {
944 // The method pointer in the frame might be the only path to the method's
945 // klass, and the klass needs to be kept alive while executing. The GCs
946 // don't trace through method pointers, so typically in similar situations
947 // the mirror or the class loader of the klass are installed as a GC root.
948 // To minimze the overhead of doing that here, we ask the GC to pass down a
949 // closure that knows how to keep klasses alive given a ClassLoaderData.
950 cld_f->do_cld(m->method_holder()->class_loader_data());
951 }
952
953 if (m->is_native() PPC32_ONLY(&& m->is_static())) {
954 f->do_oop(interpreter_frame_temp_oop_addr());
955 }
956
957 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
958
959 Symbol* signature = NULL;
960 bool has_receiver = false;
961
962 // Process a callee's arguments if we are at a call site
963 // (i.e., if we are at an invoke bytecode)
964 // This is used sometimes for calling into the VM, not for another
965 // interpreted or compiled frame.
966 if (!m->is_native()) {
967 Bytecode_invoke call = Bytecode_invoke_check(m, bci);
968 if (call.is_valid()) {
969 signature = call.signature();
970 has_receiver = call.has_receiver();
971 if (map->include_argument_oops() &&
972 interpreter_frame_expression_stack_size() > 0) {
973 ResourceMark rm(thread); // is this right ???
974 // we are at a call site & the expression stack is not empty
975 // => process callee's arguments
976 //
977 // Note: The expression stack can be empty if an exception
978 // occurred during method resolution/execution. In all
979 // cases we empty the expression stack completely be-
980 // fore handling the exception (the exception handling
981 // code in the interpreter calls a blocking runtime
982 // routine which can cause this code to be executed).
983 // (was bug gri 7/27/98)
984 oops_interpreted_arguments_do(signature, has_receiver, f);
985 }
986 }
987 }
988
989 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f);
990
991 // process locals & expression stack
992 InterpreterOopMap mask;
993 if (query_oop_map_cache) {
994 m->mask_for(bci, &mask);
995 } else {
996 OopMapCache::compute_one_oop_map(m, bci, &mask);
997 }
998 mask.iterate_oop(&blk);
999 }
1000
1001
1002 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) {
1003 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f);
1004 finder.oops_do();
1005 }
1006
1007 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) {
1008 assert(_cb != NULL, "sanity check");
1009 if (_cb->oop_maps() != NULL) {
1010 OopMapSet::oops_do(this, reg_map, f);
1011
1012 // Preserve potential arguments for a callee. We handle this by dispatching
1013 // on the codeblob. For c2i, we do
1014 if (reg_map->include_argument_oops()) {
1015 _cb->preserve_callee_argument_oops(*this, reg_map, f);
1016 }
1017 }
1018 // In cases where perm gen is collected, GC will want to mark
1019 // oops referenced from nmethods active on thread stacks so as to
1020 // prevent them from being collected. However, this visit should be
1021 // restricted to certain phases of the collection only. The
1022 // closure decides how it wants nmethods to be traced.
1023 if (cf != NULL)
1024 cf->do_code_blob(_cb);
1025 }
1026
1027 class CompiledArgumentOopFinder: public SignatureInfo {
1028 protected:
1029 OopClosure* _f;
1030 int _offset; // the current offset, incremented with each argument
1031 bool _has_receiver; // true if the callee has a receiver
1032 bool _has_appendix; // true if the call has an appendix
1033 frame _fr;
1034 RegisterMap* _reg_map;
1035 int _arg_size;
1036 VMRegPair* _regs; // VMReg list of arguments
1037
1038 void set(int size, BasicType type) {
1039 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset();
1040 _offset += size;
1041 }
1042
1043 virtual void handle_oop_offset() {
1044 // Extract low order register number from register array.
1045 // In LP64-land, the high-order bits are valid but unhelpful.
1046 VMReg reg = _regs[_offset].first();
1047 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map);
1048 _f->do_oop(loc);
1049 }
1050
1051 public:
1052 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map)
1053 : SignatureInfo(signature) {
1054
1055 // initialize CompiledArgumentOopFinder
1056 _f = f;
1057 _offset = 0;
1058 _has_receiver = has_receiver;
1059 _has_appendix = has_appendix;
1060 _fr = fr;
1061 _reg_map = (RegisterMap*)reg_map;
1062 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0);
1063
1064 int arg_size;
1065 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size);
1066 assert(arg_size == _arg_size, "wrong arg size");
1067 }
1068
1069 void oops_do() {
1070 if (_has_receiver) {
1071 handle_oop_offset();
1072 _offset++;
1073 }
1074 iterate_parameters();
1075 if (_has_appendix) {
1076 handle_oop_offset();
1077 _offset++;
1078 }
1079 }
1080 };
1081
1082 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) {
1083 ResourceMark rm;
1084 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map);
1085 finder.oops_do();
1086 }
1087
1088
1089 // Get receiver out of callers frame, i.e. find parameter 0 in callers
1090 // frame. Consult ADLC for where parameter 0 is to be found. Then
1091 // check local reg_map for it being a callee-save register or argument
1092 // register, both of which are saved in the local frame. If not found
1093 // there, it must be an in-stack argument of the caller.
1094 // Note: caller.sp() points to callee-arguments
1095 oop frame::retrieve_receiver(RegisterMap* reg_map) {
1096 frame caller = *this;
1097
1098 // First consult the ADLC on where it puts parameter 0 for this signature.
1099 VMReg reg = SharedRuntime::name_for_receiver();
1100 oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map);
1101 if (oop_adr == NULL) {
1102 guarantee(oop_adr != NULL, "bad register save location");
1103 return NULL;
1104 }
1105 oop r = *oop_adr;
1106 assert(Universe::heap()->is_in_or_null(r), err_msg("bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (void *) r, (void *) r));
1107 return r;
1108 }
1109
1110
1111 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const {
1112 if(reg->is_reg()) {
1113 // If it is passed in a register, it got spilled in the stub frame.
1114 return (oop *)reg_map->location(reg);
1115 } else {
1116 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size;
1117 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes);
1118 }
1119 }
1120
1121 BasicLock* frame::get_native_monitor() {
1122 nmethod* nm = (nmethod*)_cb;
1123 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1124 "Should not call this unless it's a native nmethod");
1125 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset());
1126 assert(byte_offset >= 0, "should not see invalid offset");
1127 return (BasicLock*) &sp()[byte_offset / wordSize];
1128 }
1129
1130 oop frame::get_native_receiver() {
1131 nmethod* nm = (nmethod*)_cb;
1132 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1133 "Should not call this unless it's a native nmethod");
1134 int byte_offset = in_bytes(nm->native_receiver_sp_offset());
1135 assert(byte_offset >= 0, "should not see invalid offset");
1136 oop owner = ((oop*) sp())[byte_offset / wordSize];
1137 assert( Universe::heap()->is_in(owner), "bad receiver" );
1138 return owner;
1139 }
1140
1141 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) {
1142 assert(map != NULL, "map must be set");
1143 if (map->include_argument_oops()) {
1144 // must collect argument oops, as nobody else is doing it
1145 Thread *thread = Thread::current();
1146 methodHandle m (thread, entry_frame_call_wrapper()->callee_method());
1147 EntryFrameOopFinder finder(this, m->signature(), m->is_static());
1148 finder.arguments_do(f);
1149 }
1150 // Traverse the Handle Block saved in the entry frame
1151 entry_frame_call_wrapper()->oops_do(f);
1152 }
1153
1154
1155 void frame::oops_do_internal(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) {
1156 #ifndef PRODUCT
1157 // simulate GC crash here to dump java thread in error report
1158 if (CrashGCForDumpingJavaThread) {
1159 char *t = NULL;
1160 *t = 'c';
1161 }
1162 #endif
1163 if (is_interpreted_frame()) {
1164 oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache);
1165 } else if (is_entry_frame()) {
1166 oops_entry_do(f, map);
1167 } else if (CodeCache::contains(pc())) {
1168 oops_code_blob_do(f, cf, map);
1169 #ifdef SHARK
1170 } else if (is_fake_stub_frame()) {
1171 // nothing to do
1172 #endif // SHARK
1173 } else {
1174 ShouldNotReachHere();
1175 }
1176 }
1177
1178 void frame::nmethods_do(CodeBlobClosure* cf) {
1179 if (_cb != NULL && _cb->is_nmethod()) {
1180 cf->do_code_blob(_cb);
1181 }
1182 }
1183
1184
1185 // call f() on the interpreted Method*s in the stack.
1186 // Have to walk the entire code cache for the compiled frames Yuck.
1187 void frame::metadata_do(void f(Metadata*)) {
1188 if (_cb != NULL && Interpreter::contains(pc())) {
1189 Method* m = this->interpreter_frame_method();
1190 assert(m != NULL, "huh?");
1191 f(m);
1192 }
1193 }
1194
1195 void frame::gc_prologue() {
1196 if (is_interpreted_frame()) {
1197 // set bcx to bci to become Method* position independent during GC
1198 interpreter_frame_set_bcx(interpreter_frame_bci());
1199 }
1200 }
1201
1202
1203 void frame::gc_epilogue() {
1204 if (is_interpreted_frame()) {
1205 // set bcx back to bcp for interpreter
1206 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp());
1207 }
1208 // call processor specific epilog function
1209 pd_gc_epilog();
1210 }
1211
1212
1213 # ifdef ENABLE_ZAP_DEAD_LOCALS
1214
1215 void frame::CheckValueClosure::do_oop(oop* p) {
1216 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) {
1217 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1218 }
1219 }
1220 frame::CheckValueClosure frame::_check_value;
1221
1222
1223 void frame::CheckOopClosure::do_oop(oop* p) {
1224 if (*p != NULL && !(*p)->is_oop()) {
1225 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1226 }
1227 }
1228 frame::CheckOopClosure frame::_check_oop;
1229
1230 void frame::check_derived_oop(oop* base, oop* derived) {
1231 _check_oop.do_oop(base);
1232 }
1233
1234
1235 void frame::ZapDeadClosure::do_oop(oop* p) {
1236 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p);
1237 *p = cast_to_oop<intptr_t>(0xbabebabe);
1238 }
1239 frame::ZapDeadClosure frame::_zap_dead;
1240
1241 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) {
1242 assert(thread == Thread::current(), "need to synchronize to do this to another thread");
1243 // Tracing - part 1
1244 if (TraceZapDeadLocals) {
1245 ResourceMark rm(thread);
1246 tty->print_cr("--------------------------------------------------------------------------------");
1247 tty->print("Zapping dead locals in ");
1248 print_on(tty);
1249 tty->cr();
1250 }
1251 // Zapping
1252 if (is_entry_frame ()) zap_dead_entry_locals (thread, map);
1253 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map);
1254 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map);
1255
1256 else
1257 // could be is_runtime_frame
1258 // so remove error: ShouldNotReachHere();
1259 ;
1260 // Tracing - part 2
1261 if (TraceZapDeadLocals) {
1262 tty->cr();
1263 }
1264 }
1265
1266
1267 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) {
1268 // get current interpreter 'pc'
1269 assert(is_interpreted_frame(), "Not an interpreted frame");
1270 Method* m = interpreter_frame_method();
1271 int bci = interpreter_frame_bci();
1272
1273 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
1274
1275 // process dynamic part
1276 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(),
1277 &_check_value);
1278 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(),
1279 &_check_oop );
1280 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(),
1281 &_zap_dead );
1282
1283 // get frame map
1284 InterpreterOopMap mask;
1285 m->mask_for(bci, &mask);
1286 mask.iterate_all( &oop_blk, &value_blk, &dead_blk);
1287 }
1288
1289
1290 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) {
1291
1292 ResourceMark rm(thread);
1293 assert(_cb != NULL, "sanity check");
1294 if (_cb->oop_maps() != NULL) {
1295 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value);
1296 }
1297 }
1298
1299
1300 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) {
1301 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented");
1302 }
1303
1304
1305 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) {
1306 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented");
1307 }
1308
1309 # endif // ENABLE_ZAP_DEAD_LOCALS
1310
1311 void frame::verify(const RegisterMap* map) {
1312 // for now make sure receiver type is correct
1313 if (is_interpreted_frame()) {
1314 Method* method = interpreter_frame_method();
1315 guarantee(method->is_method(), "method is wrong in frame::verify");
1316 if (!method->is_static()) {
1317 // fetch the receiver
1318 oop* p = (oop*) interpreter_frame_local_at(0);
1319 // make sure we have the right receiver type
1320 }
1321 }
1322 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");)
1323 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false);
1324 }
1325
1326
1327 #ifdef ASSERT
1328 bool frame::verify_return_pc(address x) {
1329 if (StubRoutines::returns_to_call_stub(x)) {
1330 return true;
1331 }
1332 if (CodeCache::contains(x)) {
1333 return true;
1334 }
1335 if (Interpreter::contains(x)) {
1336 return true;
1337 }
1338 return false;
1339 }
1340 #endif
1341
1342 #ifdef ASSERT
1343 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const {
1344 assert(is_interpreted_frame(), "Not an interpreted frame");
1345 // verify that the value is in the right part of the frame
1346 address low_mark = (address) interpreter_frame_monitor_end();
1347 address high_mark = (address) interpreter_frame_monitor_begin();
1348 address current = (address) value;
1349
1350 const int monitor_size = frame::interpreter_frame_monitor_size();
1351 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*");
1352 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark");
1353
1354 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*");
1355 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark");
1356 }
1357 #endif
1358
1359 #ifndef PRODUCT
1360 void frame::describe(FrameValues& values, int frame_no) {
1361 // boundaries: sp and the 'real' frame pointer
1362 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1);
1363 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp()
1364
1365 // print frame info at the highest boundary
1366 intptr_t* info_address = MAX2(sp(), frame_pointer);
1367
1368 if (info_address != frame_pointer) {
1369 // print frame_pointer explicitly if not marked by the frame info
1370 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1);
1371 }
1372
1373 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) {
1374 // Label values common to most frames
1375 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no));
1376 }
1377
1378 if (is_interpreted_frame()) {
1379 Method* m = interpreter_frame_method();
1380 int bci = interpreter_frame_bci();
1381
1382 // Label the method and current bci
1383 values.describe(-1, info_address,
1384 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2);
1385 values.describe(-1, info_address,
1386 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1);
1387 if (m->max_locals() > 0) {
1388 intptr_t* l0 = interpreter_frame_local_at(0);
1389 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1);
1390 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1);
1391 // Report each local and mark as owned by this frame
1392 for (int l = 0; l < m->max_locals(); l++) {
1393 intptr_t* l0 = interpreter_frame_local_at(l);
1394 values.describe(frame_no, l0, err_msg("local %d", l));
1395 }
1396 }
1397
1398 // Compute the actual expression stack size
1399 InterpreterOopMap mask;
1400 OopMapCache::compute_one_oop_map(m, bci, &mask);
1401 intptr_t* tos = NULL;
1402 // Report each stack element and mark as owned by this frame
1403 for (int e = 0; e < mask.expression_stack_size(); e++) {
1404 tos = MAX2(tos, interpreter_frame_expression_stack_at(e));
1405 values.describe(frame_no, interpreter_frame_expression_stack_at(e),
1406 err_msg("stack %d", e));
1407 }
1408 if (tos != NULL) {
1409 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1);
1410 }
1411 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) {
1412 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin");
1413 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end");
1414 }
1415 } else if (is_entry_frame()) {
1416 // For now just label the frame
1417 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2);
1418 } else if (is_compiled_frame()) {
1419 // For now just label the frame
1420 nmethod* nm = cb()->as_nmethod_or_null();
1421 values.describe(-1, info_address,
1422 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no,
1423 nm, nm->method()->name_and_sig_as_C_string(),
1424 (_deopt_state == is_deoptimized) ?
1425 " (deoptimized)" :
1426 ((_deopt_state == unknown) ? " (state unknown)" : "")),
1427 2);
1428 } else if (is_native_frame()) {
1429 // For now just label the frame
1430 nmethod* nm = cb()->as_nmethod_or_null();
1431 values.describe(-1, info_address,
1432 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no,
1433 nm, nm->method()->name_and_sig_as_C_string()), 2);
1434 } else {
1435 // provide default info if not handled before
1436 char *info = (char *) "special frame";
1437 if ((_cb != NULL) &&
1438 (_cb->name() != NULL)) {
1439 info = (char *)_cb->name();
1440 }
1441 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2);
1442 }
1443
1444 // platform dependent additional data
1445 describe_pd(values, frame_no);
1446 }
1447
1448 #endif
1449
1450
1451 //-----------------------------------------------------------------------------------
1452 // StackFrameStream implementation
1453
1454 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) {
1455 assert(thread->has_last_Java_frame(), "sanity check");
1456 _fr = thread->last_frame();
1457 _is_done = false;
1458 }
1459
1460
1461 #ifndef PRODUCT
1462
1463 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) {
1464 FrameValue fv;
1465 fv.location = location;
1466 fv.owner = owner;
1467 fv.priority = priority;
1468 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1);
1469 strcpy(fv.description, description);
1470 _values.append(fv);
1471 }
1472
1473
1474 #ifdef ASSERT
1475 void FrameValues::validate() {
1476 _values.sort(compare);
1477 bool error = false;
1478 FrameValue prev;
1479 prev.owner = -1;
1480 for (int i = _values.length() - 1; i >= 0; i--) {
1481 FrameValue fv = _values.at(i);
1482 if (fv.owner == -1) continue;
1483 if (prev.owner == -1) {
1484 prev = fv;
1485 continue;
1486 }
1487 if (prev.location == fv.location) {
1488 if (fv.owner != prev.owner) {
1489 tty->print_cr("overlapping storage");
1490 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description);
1491 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1492 error = true;
1493 }
1494 } else {
1495 prev = fv;
1496 }
1497 }
1498 assert(!error, "invalid layout");
1499 }
1500 #endif // ASSERT
1501
1502 void FrameValues::print(JavaThread* thread) {
1503 _values.sort(compare);
1504
1505 // Sometimes values like the fp can be invalid values if the
1506 // register map wasn't updated during the walk. Trim out values
1507 // that aren't actually in the stack of the thread.
1508 int min_index = 0;
1509 int max_index = _values.length() - 1;
1510 intptr_t* v0 = _values.at(min_index).location;
1511 intptr_t* v1 = _values.at(max_index).location;
1512
1513 if (thread == Thread::current()) {
1514 while (!thread->is_in_stack((address)v0)) {
1515 v0 = _values.at(++min_index).location;
1516 }
1517 while (!thread->is_in_stack((address)v1)) {
1518 v1 = _values.at(--max_index).location;
1519 }
1520 } else {
1521 while (!thread->on_local_stack((address)v0)) {
1522 v0 = _values.at(++min_index).location;
1523 }
1524 while (!thread->on_local_stack((address)v1)) {
1525 v1 = _values.at(--max_index).location;
1526 }
1527 }
1528 intptr_t* min = MIN2(v0, v1);
1529 intptr_t* max = MAX2(v0, v1);
1530 intptr_t* cur = max;
1531 intptr_t* last = NULL;
1532 for (int i = max_index; i >= min_index; i--) {
1533 FrameValue fv = _values.at(i);
1534 while (cur > fv.location) {
1535 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur);
1536 cur--;
1537 }
1538 if (last == fv.location) {
1539 const char* spacer = " " LP64_ONLY(" ");
1540 tty->print_cr(" %s %s %s", spacer, spacer, fv.description);
1541 } else {
1542 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1543 last = fv.location;
1544 cur--;
1545 }
1546 }
1547 }
1548
1549 #endif // ndef PRODUCT