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_aarch64
53 # include "nativeInst_aarch64.hpp"
54 #endif
55 #ifdef TARGET_ARCH_sparc
56 # include "nativeInst_sparc.hpp"
57 #endif
58 #ifdef TARGET_ARCH_zero
59 # include "nativeInst_zero.hpp"
60 #endif
61 #ifdef TARGET_ARCH_arm
62 # include "nativeInst_arm.hpp"
63 #endif
64 #ifdef TARGET_ARCH_ppc
65 # include "nativeInst_ppc.hpp"
66 #endif
67
68 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
69
70 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) {
71 _thread = thread;
72 _update_map = update_map;
73 clear();
74 debug_only(_update_for_id = NULL;)
75 #ifndef PRODUCT
76 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL;
77 #endif /* PRODUCT */
78 }
79
80 RegisterMap::RegisterMap(const RegisterMap* map) {
81 assert(map != this, "bad initialization parameter");
82 assert(map != NULL, "RegisterMap must be present");
83 _thread = map->thread();
84 _update_map = map->update_map();
85 _include_argument_oops = map->include_argument_oops();
86 debug_only(_update_for_id = map->_update_for_id;)
87 pd_initialize_from(map);
88 if (update_map()) {
89 for(int i = 0; i < location_valid_size; i++) {
90 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i];
91 _location_valid[i] = bits;
92 // for whichever bits are set, pull in the corresponding map->_location
93 int j = i*location_valid_type_size;
94 while (bits != 0) {
95 if ((bits & 1) != 0) {
96 assert(0 <= j && j < reg_count, "range check");
97 _location[j] = map->_location[j];
98 }
99 bits >>= 1;
100 j += 1;
101 }
102 }
103 }
104 }
105
106 void RegisterMap::clear() {
107 set_include_argument_oops(true);
108 if (_update_map) {
109 for(int i = 0; i < location_valid_size; i++) {
110 _location_valid[i] = 0;
111 }
112 pd_clear();
113 } else {
114 pd_initialize();
115 }
116 }
117
118 #ifndef PRODUCT
119
120 void RegisterMap::print_on(outputStream* st) const {
121 st->print_cr("Register map");
122 for(int i = 0; i < reg_count; i++) {
123
124 VMReg r = VMRegImpl::as_VMReg(i);
125 intptr_t* src = (intptr_t*) location(r);
126 if (src != NULL) {
127
128 r->print_on(st);
129 st->print(" [" INTPTR_FORMAT "] = ", src);
130 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) {
131 st->print_cr("<misaligned>");
132 } else {
133 st->print_cr(INTPTR_FORMAT, *src);
134 }
135 }
136 }
137 }
138
139 void RegisterMap::print() const {
140 print_on(tty);
141 }
142
143 #endif
144 // This returns the pc that if you were in the debugger you'd see. Not
145 // the idealized value in the frame object. This undoes the magic conversion
146 // that happens for deoptimized frames. In addition it makes the value the
147 // hardware would want to see in the native frame. The only user (at this point)
148 // is deoptimization. It likely no one else should ever use it.
149
150 address frame::raw_pc() const {
151 if (is_deoptimized_frame()) {
152 nmethod* nm = cb()->as_nmethod_or_null();
153 if (nm->is_method_handle_return(pc()))
154 return nm->deopt_mh_handler_begin() - pc_return_offset;
155 else
156 return nm->deopt_handler_begin() - pc_return_offset;
157 } else {
158 return (pc() - pc_return_offset);
159 }
160 }
161
162 // Change the pc in a frame object. This does not change the actual pc in
163 // actual frame. To do that use patch_pc.
164 //
165 void frame::set_pc(address newpc ) {
166 #ifdef ASSERT
167 if (_cb != NULL && _cb->is_nmethod()) {
168 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation");
169 }
170 #endif // ASSERT
171
172 // Unsafe to use the is_deoptimzed tester after changing pc
173 _deopt_state = unknown;
174 _pc = newpc;
175 _cb = CodeCache::find_blob_unsafe(_pc);
176
177 }
178
179 // type testers
180 bool frame::is_ignored_frame() const {
181 return false; // FIXME: some LambdaForm frames should be ignored
182 }
183 bool frame::is_deoptimized_frame() const {
184 assert(_deopt_state != unknown, "not answerable");
185 return _deopt_state == is_deoptimized;
186 }
187
188 bool frame::is_native_frame() const {
189 return (_cb != NULL &&
190 _cb->is_nmethod() &&
191 ((nmethod*)_cb)->is_native_method());
192 }
193
194 bool frame::is_java_frame() const {
195 if (is_interpreted_frame()) return true;
196 if (is_compiled_frame()) return true;
197 return false;
198 }
199
200
201 bool frame::is_compiled_frame() const {
202 if (_cb != NULL &&
203 _cb->is_nmethod() &&
204 ((nmethod*)_cb)->is_java_method()) {
205 return true;
206 }
207 return false;
208 }
209
210
211 bool frame::is_runtime_frame() const {
212 return (_cb != NULL && _cb->is_runtime_stub());
213 }
214
215 bool frame::is_safepoint_blob_frame() const {
216 return (_cb != NULL && _cb->is_safepoint_stub());
217 }
218
219 // testers
220
221 bool frame::is_first_java_frame() const {
222 RegisterMap map(JavaThread::current(), false); // No update
223 frame s;
224 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map));
225 return s.is_first_frame();
226 }
227
228
229 bool frame::entry_frame_is_first() const {
230 return entry_frame_call_wrapper()->is_first_frame();
231 }
232
233 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const {
234 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr();
235 address addr = (address) jcw;
236
237 // addr must be within the usable part of the stack
238 if (thread->is_in_usable_stack(addr)) {
239 return *jcw;
240 }
241
242 return NULL;
243 }
244
245 bool frame::is_entry_frame_valid(JavaThread* thread) const {
246 // Validate the JavaCallWrapper an entry frame must have
247 address jcw = (address)entry_frame_call_wrapper();
248 bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)fp()); // less than stack base
249 if (!jcw_safe) {
250 return false;
251 }
252
253 // Validate sp saved in the java frame anchor
254 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor();
255 return (jfa->last_Java_sp() > sp());
256 }
257
258 bool frame::should_be_deoptimized() const {
259 if (_deopt_state == is_deoptimized ||
260 !is_compiled_frame() ) return false;
261 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod");
262 nmethod* nm = (nmethod *)_cb;
263 if (TraceDependencies) {
264 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false");
265 nm->print_value_on(tty);
266 tty->cr();
267 }
268
269 if( !nm->is_marked_for_deoptimization() )
270 return false;
271
272 // If at the return point, then the frame has already been popped, and
273 // only the return needs to be executed. Don't deoptimize here.
274 return !nm->is_at_poll_return(pc());
275 }
276
277 bool frame::can_be_deoptimized() const {
278 if (!is_compiled_frame()) return false;
279 nmethod* nm = (nmethod*)_cb;
280
281 if( !nm->can_be_deoptimized() )
282 return false;
283
284 return !nm->is_at_poll_return(pc());
285 }
286
287 void frame::deoptimize(JavaThread* thread) {
288 // Schedule deoptimization of an nmethod activation with this frame.
289 assert(_cb != NULL && _cb->is_nmethod(), "must be");
290 nmethod* nm = (nmethod*)_cb;
291
292 // This is a fix for register window patching race
293 if (NeedsDeoptSuspend && Thread::current() != thread) {
294 assert(SafepointSynchronize::is_at_safepoint(),
295 "patching other threads for deopt may only occur at a safepoint");
296
297 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that
298 // we could see the frame again and ask for it to be deoptimized since
299 // it might move for a long time. That is harmless and we just ignore it.
300 if (id() == thread->must_deopt_id()) {
301 assert(thread->is_deopt_suspend(), "lost suspension");
302 return;
303 }
304
305 // We are at a safepoint so the target thread can only be
306 // in 4 states:
307 // blocked - no problem
308 // blocked_trans - no problem (i.e. could have woken up from blocked
309 // during a safepoint).
310 // native - register window pc patching race
311 // native_trans - momentary state
312 //
313 // We could just wait out a thread in native_trans to block.
314 // Then we'd have all the issues that the safepoint code has as to
315 // whether to spin or block. It isn't worth it. Just treat it like
316 // native and be done with it.
317 //
318 // Examine the state of the thread at the start of safepoint since
319 // threads that were in native at the start of the safepoint could
320 // come to a halt during the safepoint, changing the current value
321 // of the safepoint_state.
322 JavaThreadState state = thread->safepoint_state()->orig_thread_state();
323 if (state == _thread_in_native || state == _thread_in_native_trans) {
324 // Since we are at a safepoint the target thread will stop itself
325 // before it can return to java as long as we remain at the safepoint.
326 // Therefore we can put an additional request for the thread to stop
327 // no matter what no (like a suspend). This will cause the thread
328 // to notice it needs to do the deopt on its own once it leaves native.
329 //
330 // The only reason we must do this is because on machine with register
331 // windows we have a race with patching the return address and the
332 // window coming live as the thread returns to the Java code (but still
333 // in native mode) and then blocks. It is only this top most frame
334 // that is at risk. So in truth we could add an additional check to
335 // see if this frame is one that is at risk.
336 RegisterMap map(thread, false);
337 frame at_risk = thread->last_frame().sender(&map);
338 if (id() == at_risk.id()) {
339 thread->set_must_deopt_id(id());
340 thread->set_deopt_suspend();
341 return;
342 }
343 }
344 } // NeedsDeoptSuspend
345
346
347 // If the call site is a MethodHandle call site use the MH deopt
348 // handler.
349 address deopt = nm->is_method_handle_return(pc()) ?
350 nm->deopt_mh_handler_begin() :
351 nm->deopt_handler_begin();
352
353 // Save the original pc before we patch in the new one
354 nm->set_original_pc(this, pc());
355 patch_pc(thread, deopt);
356
357 #ifdef ASSERT
358 {
359 RegisterMap map(thread, false);
360 frame check = thread->last_frame();
361 while (id() != check.id()) {
362 check = check.sender(&map);
363 }
364 assert(check.is_deoptimized_frame(), "missed deopt");
365 }
366 #endif // ASSERT
367 }
368
369 frame frame::java_sender() const {
370 RegisterMap map(JavaThread::current(), false);
371 frame s;
372 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ;
373 guarantee(s.is_java_frame(), "tried to get caller of first java frame");
374 return s;
375 }
376
377 frame frame::real_sender(RegisterMap* map) const {
378 frame result = sender(map);
379 while (result.is_runtime_frame() ||
380 result.is_ignored_frame()) {
381 result = result.sender(map);
382 }
383 return result;
384 }
385
386 // Note: called by profiler - NOT for current thread
387 frame frame::profile_find_Java_sender_frame(JavaThread *thread) {
388 // If we don't recognize this frame, walk back up the stack until we do
389 RegisterMap map(thread, false);
390 frame first_java_frame = frame();
391
392 // Find the first Java frame on the stack starting with input frame
393 if (is_java_frame()) {
394 // top frame is compiled frame or deoptimized frame
395 first_java_frame = *this;
396 } else if (safe_for_sender(thread)) {
397 for (frame sender_frame = sender(&map);
398 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame();
399 sender_frame = sender_frame.sender(&map)) {
400 if (sender_frame.is_java_frame()) {
401 first_java_frame = sender_frame;
402 break;
403 }
404 }
405 }
406 return first_java_frame;
407 }
408
409 // Interpreter frames
410
411
412 void frame::interpreter_frame_set_locals(intptr_t* locs) {
413 assert(is_interpreted_frame(), "Not an interpreted frame");
414 *interpreter_frame_locals_addr() = locs;
415 }
416
417 Method* frame::interpreter_frame_method() const {
418 assert(is_interpreted_frame(), "interpreted frame expected");
419 Method* m = *interpreter_frame_method_addr();
420 assert(m->is_method(), "not a Method*");
421 return m;
422 }
423
424 void frame::interpreter_frame_set_method(Method* method) {
425 assert(is_interpreted_frame(), "interpreted frame expected");
426 *interpreter_frame_method_addr() = method;
427 }
428
429 void frame::interpreter_frame_set_bcx(intptr_t bcx) {
430 assert(is_interpreted_frame(), "Not an interpreted frame");
431 if (ProfileInterpreter) {
432 bool formerly_bci = is_bci(interpreter_frame_bcx());
433 bool is_now_bci = is_bci(bcx);
434 *interpreter_frame_bcx_addr() = bcx;
435
436 intptr_t mdx = interpreter_frame_mdx();
437
438 if (mdx != 0) {
439 if (formerly_bci) {
440 if (!is_now_bci) {
441 // The bcx was just converted from bci to bcp.
442 // Convert the mdx in parallel.
443 MethodData* mdo = interpreter_frame_method()->method_data();
444 assert(mdo != NULL, "");
445 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one.
446 address mdp = mdo->di_to_dp(mdi);
447 interpreter_frame_set_mdx((intptr_t)mdp);
448 }
449 } else {
450 if (is_now_bci) {
451 // The bcx was just converted from bcp to bci.
452 // Convert the mdx in parallel.
453 MethodData* mdo = interpreter_frame_method()->method_data();
454 assert(mdo != NULL, "");
455 int mdi = mdo->dp_to_di((address)mdx);
456 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0.
457 }
458 }
459 }
460 } else {
461 *interpreter_frame_bcx_addr() = bcx;
462 }
463 }
464
465 jint frame::interpreter_frame_bci() const {
466 assert(is_interpreted_frame(), "interpreted frame expected");
467 intptr_t bcx = interpreter_frame_bcx();
468 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx);
469 }
470
471 void frame::interpreter_frame_set_bci(jint bci) {
472 assert(is_interpreted_frame(), "interpreted frame expected");
473 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC");
474 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci));
475 }
476
477 address frame::interpreter_frame_bcp() const {
478 assert(is_interpreted_frame(), "interpreted frame expected");
479 intptr_t bcx = interpreter_frame_bcx();
480 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx;
481 }
482
483 void frame::interpreter_frame_set_bcp(address bcp) {
484 assert(is_interpreted_frame(), "interpreted frame expected");
485 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC");
486 interpreter_frame_set_bcx((intptr_t)bcp);
487 }
488
489 void frame::interpreter_frame_set_mdx(intptr_t mdx) {
490 assert(is_interpreted_frame(), "Not an interpreted frame");
491 assert(ProfileInterpreter, "must be profiling interpreter");
492 *interpreter_frame_mdx_addr() = mdx;
493 }
494
495 address frame::interpreter_frame_mdp() const {
496 assert(ProfileInterpreter, "must be profiling interpreter");
497 assert(is_interpreted_frame(), "interpreted frame expected");
498 intptr_t bcx = interpreter_frame_bcx();
499 intptr_t mdx = interpreter_frame_mdx();
500
501 assert(!is_bci(bcx), "should not access mdp during GC");
502 return (address)mdx;
503 }
504
505 void frame::interpreter_frame_set_mdp(address mdp) {
506 assert(is_interpreted_frame(), "interpreted frame expected");
507 if (mdp == NULL) {
508 // Always allow the mdp to be cleared.
509 interpreter_frame_set_mdx((intptr_t)mdp);
510 }
511 intptr_t bcx = interpreter_frame_bcx();
512 assert(!is_bci(bcx), "should not set mdp during GC");
513 interpreter_frame_set_mdx((intptr_t)mdp);
514 }
515
516 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const {
517 assert(is_interpreted_frame(), "Not an interpreted frame");
518 #ifdef ASSERT
519 interpreter_frame_verify_monitor(current);
520 #endif
521 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size());
522 return next;
523 }
524
525 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const {
526 assert(is_interpreted_frame(), "Not an interpreted frame");
527 #ifdef ASSERT
528 // // This verification needs to be checked before being enabled
529 // interpreter_frame_verify_monitor(current);
530 #endif
531 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size());
532 return previous;
533 }
534
535 // Interpreter locals and expression stack locations.
536
537 intptr_t* frame::interpreter_frame_local_at(int index) const {
538 const int n = Interpreter::local_offset_in_bytes(index)/wordSize;
539 return &((*interpreter_frame_locals_addr())[n]);
540 }
541
542 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const {
543 const int i = offset * interpreter_frame_expression_stack_direction();
544 const int n = i * Interpreter::stackElementWords;
545 return &(interpreter_frame_expression_stack()[n]);
546 }
547
548 jint frame::interpreter_frame_expression_stack_size() const {
549 // Number of elements on the interpreter expression stack
550 // Callers should span by stackElementWords
551 int element_size = Interpreter::stackElementWords;
552 size_t stack_size = 0;
553 if (frame::interpreter_frame_expression_stack_direction() < 0) {
554 stack_size = (interpreter_frame_expression_stack() -
555 interpreter_frame_tos_address() + 1)/element_size;
556 } else {
557 stack_size = (interpreter_frame_tos_address() -
558 interpreter_frame_expression_stack() + 1)/element_size;
559 }
560 assert( stack_size <= (size_t)max_jint, "stack size too big");
561 return ((jint)stack_size);
562 }
563
564
565 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp)
566
567 const char* frame::print_name() const {
568 if (is_native_frame()) return "Native";
569 if (is_interpreted_frame()) return "Interpreted";
570 if (is_compiled_frame()) {
571 if (is_deoptimized_frame()) return "Deoptimized";
572 return "Compiled";
573 }
574 if (sp() == NULL) return "Empty";
575 return "C";
576 }
577
578 void frame::print_value_on(outputStream* st, JavaThread *thread) const {
579 NOT_PRODUCT(address begin = pc()-40;)
580 NOT_PRODUCT(address end = NULL;)
581
582 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp());
583 if (sp() != NULL)
584 st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), real_fp(), pc());
585
586 if (StubRoutines::contains(pc())) {
587 st->print_cr(")");
588 st->print("(");
589 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
590 st->print("~Stub::%s", desc->name());
591 NOT_PRODUCT(begin = desc->begin(); end = desc->end();)
592 } else if (Interpreter::contains(pc())) {
593 st->print_cr(")");
594 st->print("(");
595 InterpreterCodelet* desc = Interpreter::codelet_containing(pc());
596 if (desc != NULL) {
597 st->print("~");
598 desc->print_on(st);
599 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();)
600 } else {
601 st->print("~interpreter");
602 }
603 }
604 st->print_cr(")");
605
606 if (_cb != NULL) {
607 st->print(" ");
608 _cb->print_value_on(st);
609 st->cr();
610 #ifndef PRODUCT
611 if (end == NULL) {
612 begin = _cb->code_begin();
613 end = _cb->code_end();
614 }
615 #endif
616 }
617 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);)
618 }
619
620
621 void frame::print_on(outputStream* st) const {
622 print_value_on(st,NULL);
623 if (is_interpreted_frame()) {
624 interpreter_frame_print_on(st);
625 }
626 }
627
628
629 void frame::interpreter_frame_print_on(outputStream* st) const {
630 #ifndef PRODUCT
631 assert(is_interpreted_frame(), "Not an interpreted frame");
632 jint i;
633 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) {
634 intptr_t x = *interpreter_frame_local_at(i);
635 st->print(" - local [" INTPTR_FORMAT "]", x);
636 st->fill_to(23);
637 st->print_cr("; #%d", i);
638 }
639 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) {
640 intptr_t x = *interpreter_frame_expression_stack_at(i);
641 st->print(" - stack [" INTPTR_FORMAT "]", x);
642 st->fill_to(23);
643 st->print_cr("; #%d", i);
644 }
645 // locks for synchronization
646 for (BasicObjectLock* current = interpreter_frame_monitor_end();
647 current < interpreter_frame_monitor_begin();
648 current = next_monitor_in_interpreter_frame(current)) {
649 st->print(" - obj [");
650 current->obj()->print_value_on(st);
651 st->print_cr("]");
652 st->print(" - lock [");
653 current->lock()->print_on(st);
654 st->print_cr("]");
655 }
656 // monitor
657 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin());
658 // bcp
659 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp());
660 st->fill_to(23);
661 st->print_cr("; @%d", interpreter_frame_bci());
662 // locals
663 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0));
664 // method
665 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method());
666 st->fill_to(23);
667 st->print("; ");
668 interpreter_frame_method()->print_name(st);
669 st->cr();
670 #endif
671 }
672
673 // Return whether the frame is in the VM or os indicating a Hotspot problem.
674 // Otherwise, it's likely a bug in the native library that the Java code calls,
675 // hopefully indicating where to submit bugs.
676 void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) {
677 // C/C++ frame
678 bool in_vm = os::address_is_in_vm(pc);
679 st->print(in_vm ? "V" : "C");
680
681 int offset;
682 bool found;
683
684 // libname
685 found = os::dll_address_to_library_name(pc, buf, buflen, &offset);
686 if (found) {
687 // skip directory names
688 const char *p1, *p2;
689 p1 = buf;
690 int len = (int)strlen(os::file_separator());
691 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len;
692 st->print(" [%s+0x%x]", p1, offset);
693 } else {
694 st->print(" " PTR_FORMAT, pc);
695 }
696
697 // function name - os::dll_address_to_function_name() may return confusing
698 // names if pc is within jvm.dll or libjvm.so, because JVM only has
699 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this
700 // only for native libraries.
701 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) {
702 found = os::dll_address_to_function_name(pc, buf, buflen, &offset);
703
704 if (found) {
705 st->print(" %s+0x%x", buf, offset);
706 }
707 }
708 }
709
710 // frame::print_on_error() is called by fatal error handler. Notice that we may
711 // crash inside this function if stack frame is corrupted. The fatal error
712 // handler can catch and handle the crash. Here we assume the frame is valid.
713 //
714 // First letter indicates type of the frame:
715 // J: Java frame (compiled)
716 // j: Java frame (interpreted)
717 // V: VM frame (C/C++)
718 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.)
719 // C: C/C++ frame
720 //
721 // We don't need detailed frame type as that in frame::print_name(). "C"
722 // suggests the problem is in user lib; everything else is likely a VM bug.
723
724 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const {
725 if (_cb != NULL) {
726 if (Interpreter::contains(pc())) {
727 Method* m = this->interpreter_frame_method();
728 if (m != NULL) {
729 m->name_and_sig_as_C_string(buf, buflen);
730 st->print("j %s", buf);
731 st->print("+%d", this->interpreter_frame_bci());
732 } else {
733 st->print("j " PTR_FORMAT, pc());
734 }
735 } else if (StubRoutines::contains(pc())) {
736 StubCodeDesc* desc = StubCodeDesc::desc_for(pc());
737 if (desc != NULL) {
738 st->print("v ~StubRoutines::%s", desc->name());
739 } else {
740 st->print("v ~StubRoutines::" PTR_FORMAT, pc());
741 }
742 } else if (_cb->is_buffer_blob()) {
743 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name());
744 } else if (_cb->is_nmethod()) {
745 nmethod* nm = (nmethod*)_cb;
746 Method* m = nm->method();
747 if (m != NULL) {
748 m->name_and_sig_as_C_string(buf, buflen);
749 st->print("J %d%s %s %s (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+0x%x]",
750 nm->compile_id(), (nm->is_osr_method() ? "%" : ""),
751 ((nm->compiler() != NULL) ? nm->compiler()->name() : ""),
752 buf, m->code_size(), _pc, _cb->code_begin(), _pc - _cb->code_begin());
753 } else {
754 st->print("J " PTR_FORMAT, pc());
755 }
756 } else if (_cb->is_runtime_stub()) {
757 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name());
758 } else if (_cb->is_deoptimization_stub()) {
759 st->print("v ~DeoptimizationBlob");
760 } else if (_cb->is_exception_stub()) {
761 st->print("v ~ExceptionBlob");
762 } else if (_cb->is_safepoint_stub()) {
763 st->print("v ~SafepointBlob");
764 } else {
765 st->print("v blob " PTR_FORMAT, pc());
766 }
767 } else {
768 print_C_frame(st, buf, buflen, pc());
769 }
770 }
771
772
773 /*
774 The interpreter_frame_expression_stack_at method in the case of SPARC needs the
775 max_stack value of the method in order to compute the expression stack address.
776 It uses the Method* in order to get the max_stack value but during GC this
777 Method* value saved on the frame is changed by reverse_and_push and hence cannot
778 be used. So we save the max_stack value in the FrameClosure object and pass it
779 down to the interpreter_frame_expression_stack_at method
780 */
781 class InterpreterFrameClosure : public OffsetClosure {
782 private:
783 frame* _fr;
784 OopClosure* _f;
785 int _max_locals;
786 int _max_stack;
787
788 public:
789 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack,
790 OopClosure* f) {
791 _fr = fr;
792 _max_locals = max_locals;
793 _max_stack = max_stack;
794 _f = f;
795 }
796
797 void offset_do(int offset) {
798 oop* addr;
799 if (offset < _max_locals) {
800 addr = (oop*) _fr->interpreter_frame_local_at(offset);
801 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame");
802 _f->do_oop(addr);
803 } else {
804 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals));
805 // In case of exceptions, the expression stack is invalid and the esp will be reset to express
806 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel).
807 bool in_stack;
808 if (frame::interpreter_frame_expression_stack_direction() > 0) {
809 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address();
810 } else {
811 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address();
812 }
813 if (in_stack) {
814 _f->do_oop(addr);
815 }
816 }
817 }
818
819 int max_locals() { return _max_locals; }
820 frame* fr() { return _fr; }
821 };
822
823
824 class InterpretedArgumentOopFinder: public SignatureInfo {
825 private:
826 OopClosure* _f; // Closure to invoke
827 int _offset; // TOS-relative offset, decremented with each argument
828 bool _has_receiver; // true if the callee has a receiver
829 frame* _fr;
830
831 void set(int size, BasicType type) {
832 _offset -= size;
833 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do();
834 }
835
836 void oop_offset_do() {
837 oop* addr;
838 addr = (oop*)_fr->interpreter_frame_tos_at(_offset);
839 _f->do_oop(addr);
840 }
841
842 public:
843 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) {
844 // compute size of arguments
845 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0);
846 assert(!fr->is_interpreted_frame() ||
847 args_size <= fr->interpreter_frame_expression_stack_size(),
848 "args cannot be on stack anymore");
849 // initialize InterpretedArgumentOopFinder
850 _f = f;
851 _fr = fr;
852 _offset = args_size;
853 }
854
855 void oops_do() {
856 if (_has_receiver) {
857 --_offset;
858 oop_offset_do();
859 }
860 iterate_parameters();
861 }
862 };
863
864
865 // Entry frame has following form (n arguments)
866 // +-----------+
867 // sp -> | last arg |
868 // +-----------+
869 // : ::: :
870 // +-----------+
871 // (sp+n)->| first arg|
872 // +-----------+
873
874
875
876 // visits and GC's all the arguments in entry frame
877 class EntryFrameOopFinder: public SignatureInfo {
878 private:
879 bool _is_static;
880 int _offset;
881 frame* _fr;
882 OopClosure* _f;
883
884 void set(int size, BasicType type) {
885 assert (_offset >= 0, "illegal offset");
886 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset);
887 _offset -= size;
888 }
889
890 void oop_at_offset_do(int offset) {
891 assert (offset >= 0, "illegal offset");
892 oop* addr = (oop*) _fr->entry_frame_argument_at(offset);
893 _f->do_oop(addr);
894 }
895
896 public:
897 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) {
898 _f = NULL; // will be set later
899 _fr = frame;
900 _is_static = is_static;
901 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0
902 }
903
904 void arguments_do(OopClosure* f) {
905 _f = f;
906 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver
907 iterate_parameters();
908 }
909
910 };
911
912 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) {
913 ArgumentSizeComputer asc(signature);
914 int size = asc.size();
915 return (oop *)interpreter_frame_tos_at(size);
916 }
917
918
919 void frame::oops_interpreted_do(OopClosure* f, CLDClosure* cld_f,
920 const RegisterMap* map, bool query_oop_map_cache) {
921 assert(is_interpreted_frame(), "Not an interpreted frame");
922 assert(map != NULL, "map must be set");
923 Thread *thread = Thread::current();
924 methodHandle m (thread, interpreter_frame_method());
925 jint bci = interpreter_frame_bci();
926
927 assert(!Universe::heap()->is_in(m()),
928 "must be valid oop");
929 assert(m->is_method(), "checking frame value");
930 assert((m->is_native() && bci == 0) ||
931 (!m->is_native() && bci >= 0 && bci < m->code_size()),
932 "invalid bci value");
933
934 // Handle the monitor elements in the activation
935 for (
936 BasicObjectLock* current = interpreter_frame_monitor_end();
937 current < interpreter_frame_monitor_begin();
938 current = next_monitor_in_interpreter_frame(current)
939 ) {
940 #ifdef ASSERT
941 interpreter_frame_verify_monitor(current);
942 #endif
943 current->oops_do(f);
944 }
945
946 // process fixed part
947 if (cld_f != NULL) {
948 // The method pointer in the frame might be the only path to the method's
949 // klass, and the klass needs to be kept alive while executing. The GCs
950 // don't trace through method pointers, so typically in similar situations
951 // the mirror or the class loader of the klass are installed as a GC root.
952 // To minimze the overhead of doing that here, we ask the GC to pass down a
953 // closure that knows how to keep klasses alive given a ClassLoaderData.
954 cld_f->do_cld(m->method_holder()->class_loader_data());
955 }
956
957 if (m->is_native() PPC32_ONLY(&& m->is_static())) {
958 f->do_oop(interpreter_frame_temp_oop_addr());
959 }
960
961 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
962
963 Symbol* signature = NULL;
964 bool has_receiver = false;
965
966 // Process a callee's arguments if we are at a call site
967 // (i.e., if we are at an invoke bytecode)
968 // This is used sometimes for calling into the VM, not for another
969 // interpreted or compiled frame.
970 if (!m->is_native()) {
971 Bytecode_invoke call = Bytecode_invoke_check(m, bci);
972 if (call.is_valid()) {
973 signature = call.signature();
974 has_receiver = call.has_receiver();
975 if (map->include_argument_oops() &&
976 interpreter_frame_expression_stack_size() > 0) {
977 ResourceMark rm(thread); // is this right ???
978 // we are at a call site & the expression stack is not empty
979 // => process callee's arguments
980 //
981 // Note: The expression stack can be empty if an exception
982 // occurred during method resolution/execution. In all
983 // cases we empty the expression stack completely be-
984 // fore handling the exception (the exception handling
985 // code in the interpreter calls a blocking runtime
986 // routine which can cause this code to be executed).
987 // (was bug gri 7/27/98)
988 oops_interpreted_arguments_do(signature, has_receiver, f);
989 }
990 }
991 }
992
993 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f);
994
995 // process locals & expression stack
996 InterpreterOopMap mask;
997 if (query_oop_map_cache) {
998 m->mask_for(bci, &mask);
999 } else {
1000 OopMapCache::compute_one_oop_map(m, bci, &mask);
1001 }
1002 mask.iterate_oop(&blk);
1003 }
1004
1005
1006 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) {
1007 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f);
1008 finder.oops_do();
1009 }
1010
1011 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) {
1012 assert(_cb != NULL, "sanity check");
1013 if (_cb->oop_maps() != NULL) {
1014 OopMapSet::oops_do(this, reg_map, f);
1015
1016 // Preserve potential arguments for a callee. We handle this by dispatching
1017 // on the codeblob. For c2i, we do
1018 if (reg_map->include_argument_oops()) {
1019 _cb->preserve_callee_argument_oops(*this, reg_map, f);
1020 }
1021 }
1022 // In cases where perm gen is collected, GC will want to mark
1023 // oops referenced from nmethods active on thread stacks so as to
1024 // prevent them from being collected. However, this visit should be
1025 // restricted to certain phases of the collection only. The
1026 // closure decides how it wants nmethods to be traced.
1027 if (cf != NULL)
1028 cf->do_code_blob(_cb);
1029 }
1030
1031 class CompiledArgumentOopFinder: public SignatureInfo {
1032 protected:
1033 OopClosure* _f;
1034 int _offset; // the current offset, incremented with each argument
1035 bool _has_receiver; // true if the callee has a receiver
1036 bool _has_appendix; // true if the call has an appendix
1037 frame _fr;
1038 RegisterMap* _reg_map;
1039 int _arg_size;
1040 VMRegPair* _regs; // VMReg list of arguments
1041
1042 void set(int size, BasicType type) {
1043 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset();
1044 _offset += size;
1045 }
1046
1047 virtual void handle_oop_offset() {
1048 // Extract low order register number from register array.
1049 // In LP64-land, the high-order bits are valid but unhelpful.
1050 VMReg reg = _regs[_offset].first();
1051 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map);
1052 _f->do_oop(loc);
1053 }
1054
1055 public:
1056 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map)
1057 : SignatureInfo(signature) {
1058
1059 // initialize CompiledArgumentOopFinder
1060 _f = f;
1061 _offset = 0;
1062 _has_receiver = has_receiver;
1063 _has_appendix = has_appendix;
1064 _fr = fr;
1065 _reg_map = (RegisterMap*)reg_map;
1066 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0);
1067
1068 int arg_size;
1069 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size);
1070 assert(arg_size == _arg_size, "wrong arg size");
1071 }
1072
1073 void oops_do() {
1074 if (_has_receiver) {
1075 handle_oop_offset();
1076 _offset++;
1077 }
1078 iterate_parameters();
1079 if (_has_appendix) {
1080 handle_oop_offset();
1081 _offset++;
1082 }
1083 }
1084 };
1085
1086 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) {
1087 ResourceMark rm;
1088 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map);
1089 finder.oops_do();
1090 }
1091
1092
1093 // Get receiver out of callers frame, i.e. find parameter 0 in callers
1094 // frame. Consult ADLC for where parameter 0 is to be found. Then
1095 // check local reg_map for it being a callee-save register or argument
1096 // register, both of which are saved in the local frame. If not found
1097 // there, it must be an in-stack argument of the caller.
1098 // Note: caller.sp() points to callee-arguments
1099 oop frame::retrieve_receiver(RegisterMap* reg_map) {
1100 frame caller = *this;
1101
1102 // First consult the ADLC on where it puts parameter 0 for this signature.
1103 VMReg reg = SharedRuntime::name_for_receiver();
1104 oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map);
1105 if (oop_adr == NULL) {
1106 guarantee(oop_adr != NULL, "bad register save location");
1107 return NULL;
1108 }
1109 oop r = *oop_adr;
1110 assert(Universe::heap()->is_in_or_null(r), err_msg("bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (void *) r, (void *) r));
1111 return r;
1112 }
1113
1114
1115 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const {
1116 if(reg->is_reg()) {
1117 // If it is passed in a register, it got spilled in the stub frame.
1118 return (oop *)reg_map->location(reg);
1119 } else {
1120 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size;
1121 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes);
1122 }
1123 }
1124
1125 BasicLock* frame::get_native_monitor() {
1126 nmethod* nm = (nmethod*)_cb;
1127 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1128 "Should not call this unless it's a native nmethod");
1129 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset());
1130 assert(byte_offset >= 0, "should not see invalid offset");
1131 return (BasicLock*) &sp()[byte_offset / wordSize];
1132 }
1133
1134 oop frame::get_native_receiver() {
1135 nmethod* nm = (nmethod*)_cb;
1136 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1137 "Should not call this unless it's a native nmethod");
1138 int byte_offset = in_bytes(nm->native_receiver_sp_offset());
1139 assert(byte_offset >= 0, "should not see invalid offset");
1140 oop owner = ((oop*) sp())[byte_offset / wordSize];
1141 assert( Universe::heap()->is_in(owner), "bad receiver" );
1142 return owner;
1143 }
1144
1145 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) {
1146 assert(map != NULL, "map must be set");
1147 if (map->include_argument_oops()) {
1148 // must collect argument oops, as nobody else is doing it
1149 Thread *thread = Thread::current();
1150 methodHandle m (thread, entry_frame_call_wrapper()->callee_method());
1151 EntryFrameOopFinder finder(this, m->signature(), m->is_static());
1152 finder.arguments_do(f);
1153 }
1154 // Traverse the Handle Block saved in the entry frame
1155 entry_frame_call_wrapper()->oops_do(f);
1156 }
1157
1158
1159 void frame::oops_do_internal(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) {
1160 #ifndef PRODUCT
1161 // simulate GC crash here to dump java thread in error report
1162 if (CrashGCForDumpingJavaThread) {
1163 char *t = NULL;
1164 *t = 'c';
1165 }
1166 #endif
1167 if (is_interpreted_frame()) {
1168 oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache);
1169 } else if (is_entry_frame()) {
1170 oops_entry_do(f, map);
1171 } else if (CodeCache::contains(pc())) {
1172 oops_code_blob_do(f, cf, map);
1173 #ifdef SHARK
1174 } else if (is_fake_stub_frame()) {
1175 // nothing to do
1176 #endif // SHARK
1177 } else {
1178 ShouldNotReachHere();
1179 }
1180 }
1181
1182 void frame::nmethods_do(CodeBlobClosure* cf) {
1183 if (_cb != NULL && _cb->is_nmethod()) {
1184 cf->do_code_blob(_cb);
1185 }
1186 }
1187
1188
1189 // call f() on the interpreted Method*s in the stack.
1190 // Have to walk the entire code cache for the compiled frames Yuck.
1191 void frame::metadata_do(void f(Metadata*)) {
1192 if (_cb != NULL && Interpreter::contains(pc())) {
1193 Method* m = this->interpreter_frame_method();
1194 assert(m != NULL, "huh?");
1195 f(m);
1196 }
1197 }
1198
1199 void frame::gc_prologue() {
1200 if (is_interpreted_frame()) {
1201 // set bcx to bci to become Method* position independent during GC
1202 interpreter_frame_set_bcx(interpreter_frame_bci());
1203 }
1204 }
1205
1206
1207 void frame::gc_epilogue() {
1208 if (is_interpreted_frame()) {
1209 // set bcx back to bcp for interpreter
1210 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp());
1211 }
1212 // call processor specific epilog function
1213 pd_gc_epilog();
1214 }
1215
1216
1217 # ifdef ENABLE_ZAP_DEAD_LOCALS
1218
1219 void frame::CheckValueClosure::do_oop(oop* p) {
1220 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) {
1221 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1222 }
1223 }
1224 frame::CheckValueClosure frame::_check_value;
1225
1226
1227 void frame::CheckOopClosure::do_oop(oop* p) {
1228 if (*p != NULL && !(*p)->is_oop()) {
1229 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1230 }
1231 }
1232 frame::CheckOopClosure frame::_check_oop;
1233
1234 void frame::check_derived_oop(oop* base, oop* derived) {
1235 _check_oop.do_oop(base);
1236 }
1237
1238
1239 void frame::ZapDeadClosure::do_oop(oop* p) {
1240 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p);
1241 *p = cast_to_oop<intptr_t>(0xbabebabe);
1242 }
1243 frame::ZapDeadClosure frame::_zap_dead;
1244
1245 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) {
1246 assert(thread == Thread::current(), "need to synchronize to do this to another thread");
1247 // Tracing - part 1
1248 if (TraceZapDeadLocals) {
1249 ResourceMark rm(thread);
1250 tty->print_cr("--------------------------------------------------------------------------------");
1251 tty->print("Zapping dead locals in ");
1252 print_on(tty);
1253 tty->cr();
1254 }
1255 // Zapping
1256 if (is_entry_frame ()) zap_dead_entry_locals (thread, map);
1257 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map);
1258 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map);
1259
1260 else
1261 // could be is_runtime_frame
1262 // so remove error: ShouldNotReachHere();
1263 ;
1264 // Tracing - part 2
1265 if (TraceZapDeadLocals) {
1266 tty->cr();
1267 }
1268 }
1269
1270
1271 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) {
1272 // get current interpreter 'pc'
1273 assert(is_interpreted_frame(), "Not an interpreted frame");
1274 Method* m = interpreter_frame_method();
1275 int bci = interpreter_frame_bci();
1276
1277 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
1278
1279 // process dynamic part
1280 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(),
1281 &_check_value);
1282 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(),
1283 &_check_oop );
1284 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(),
1285 &_zap_dead );
1286
1287 // get frame map
1288 InterpreterOopMap mask;
1289 m->mask_for(bci, &mask);
1290 mask.iterate_all( &oop_blk, &value_blk, &dead_blk);
1291 }
1292
1293
1294 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) {
1295
1296 ResourceMark rm(thread);
1297 assert(_cb != NULL, "sanity check");
1298 if (_cb->oop_maps() != NULL) {
1299 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value);
1300 }
1301 }
1302
1303
1304 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) {
1305 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented");
1306 }
1307
1308
1309 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) {
1310 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented");
1311 }
1312
1313 # endif // ENABLE_ZAP_DEAD_LOCALS
1314
1315 void frame::verify(const RegisterMap* map) {
1316 // for now make sure receiver type is correct
1317 if (is_interpreted_frame()) {
1318 Method* method = interpreter_frame_method();
1319 guarantee(method->is_method(), "method is wrong in frame::verify");
1320 if (!method->is_static()) {
1321 // fetch the receiver
1322 oop* p = (oop*) interpreter_frame_local_at(0);
1323 // make sure we have the right receiver type
1324 }
1325 }
1326 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");)
1327 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false);
1328 }
1329
1330
1331 #ifdef ASSERT
1332 bool frame::verify_return_pc(address x) {
1333 if (StubRoutines::returns_to_call_stub(x)) {
1334 return true;
1335 }
1336 if (CodeCache::contains(x)) {
1337 return true;
1338 }
1339 if (Interpreter::contains(x)) {
1340 return true;
1341 }
1342 return false;
1343 }
1344 #endif
1345
1346 #ifdef ASSERT
1347 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const {
1348 assert(is_interpreted_frame(), "Not an interpreted frame");
1349 // verify that the value is in the right part of the frame
1350 address low_mark = (address) interpreter_frame_monitor_end();
1351 address high_mark = (address) interpreter_frame_monitor_begin();
1352 address current = (address) value;
1353
1354 const int monitor_size = frame::interpreter_frame_monitor_size();
1355 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*");
1356 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark");
1357
1358 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*");
1359 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark");
1360 }
1361 #endif
1362
1363 #ifndef PRODUCT
1364 void frame::describe(FrameValues& values, int frame_no) {
1365 // boundaries: sp and the 'real' frame pointer
1366 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1);
1367 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp()
1368
1369 // print frame info at the highest boundary
1370 intptr_t* info_address = MAX2(sp(), frame_pointer);
1371
1372 if (info_address != frame_pointer) {
1373 // print frame_pointer explicitly if not marked by the frame info
1374 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1);
1375 }
1376
1377 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) {
1378 // Label values common to most frames
1379 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no));
1380 }
1381
1382 if (is_interpreted_frame()) {
1383 Method* m = interpreter_frame_method();
1384 int bci = interpreter_frame_bci();
1385
1386 // Label the method and current bci
1387 values.describe(-1, info_address,
1388 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2);
1389 values.describe(-1, info_address,
1390 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1);
1391 if (m->max_locals() > 0) {
1392 intptr_t* l0 = interpreter_frame_local_at(0);
1393 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1);
1394 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1);
1395 // Report each local and mark as owned by this frame
1396 for (int l = 0; l < m->max_locals(); l++) {
1397 intptr_t* l0 = interpreter_frame_local_at(l);
1398 values.describe(frame_no, l0, err_msg("local %d", l));
1399 }
1400 }
1401
1402 // Compute the actual expression stack size
1403 InterpreterOopMap mask;
1404 OopMapCache::compute_one_oop_map(m, bci, &mask);
1405 intptr_t* tos = NULL;
1406 // Report each stack element and mark as owned by this frame
1407 for (int e = 0; e < mask.expression_stack_size(); e++) {
1408 tos = MAX2(tos, interpreter_frame_expression_stack_at(e));
1409 values.describe(frame_no, interpreter_frame_expression_stack_at(e),
1410 err_msg("stack %d", e));
1411 }
1412 if (tos != NULL) {
1413 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1);
1414 }
1415 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) {
1416 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin");
1417 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end");
1418 }
1419 } else if (is_entry_frame()) {
1420 // For now just label the frame
1421 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2);
1422 } else if (is_compiled_frame()) {
1423 // For now just label the frame
1424 nmethod* nm = cb()->as_nmethod_or_null();
1425 values.describe(-1, info_address,
1426 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no,
1427 nm, nm->method()->name_and_sig_as_C_string(),
1428 (_deopt_state == is_deoptimized) ?
1429 " (deoptimized)" :
1430 ((_deopt_state == unknown) ? " (state unknown)" : "")),
1431 2);
1432 } else if (is_native_frame()) {
1433 // For now just label the frame
1434 nmethod* nm = cb()->as_nmethod_or_null();
1435 values.describe(-1, info_address,
1436 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no,
1437 nm, nm->method()->name_and_sig_as_C_string()), 2);
1438 } else {
1439 // provide default info if not handled before
1440 char *info = (char *) "special frame";
1441 if ((_cb != NULL) &&
1442 (_cb->name() != NULL)) {
1443 info = (char *)_cb->name();
1444 }
1445 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2);
1446 }
1447
1448 // platform dependent additional data
1449 describe_pd(values, frame_no);
1450 }
1451
1452 #endif
1453
1454
1455 //-----------------------------------------------------------------------------------
1456 // StackFrameStream implementation
1457
1458 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) {
1459 assert(thread->has_last_Java_frame(), "sanity check");
1460 _fr = thread->last_frame();
1461 _is_done = false;
1462 }
1463
1464
1465 #ifndef PRODUCT
1466
1467 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) {
1468 FrameValue fv;
1469 fv.location = location;
1470 fv.owner = owner;
1471 fv.priority = priority;
1472 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1);
1473 strcpy(fv.description, description);
1474 _values.append(fv);
1475 }
1476
1477
1478 #ifdef ASSERT
1479 void FrameValues::validate() {
1480 _values.sort(compare);
1481 bool error = false;
1482 FrameValue prev;
1483 prev.owner = -1;
1484 for (int i = _values.length() - 1; i >= 0; i--) {
1485 FrameValue fv = _values.at(i);
1486 if (fv.owner == -1) continue;
1487 if (prev.owner == -1) {
1488 prev = fv;
1489 continue;
1490 }
1491 if (prev.location == fv.location) {
1492 if (fv.owner != prev.owner) {
1493 tty->print_cr("overlapping storage");
1494 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description);
1495 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1496 error = true;
1497 }
1498 } else {
1499 prev = fv;
1500 }
1501 }
1502 assert(!error, "invalid layout");
1503 }
1504 #endif // ASSERT
1505
1506 void FrameValues::print(JavaThread* thread) {
1507 _values.sort(compare);
1508
1509 // Sometimes values like the fp can be invalid values if the
1510 // register map wasn't updated during the walk. Trim out values
1511 // that aren't actually in the stack of the thread.
1512 int min_index = 0;
1513 int max_index = _values.length() - 1;
1514 intptr_t* v0 = _values.at(min_index).location;
1515 intptr_t* v1 = _values.at(max_index).location;
1516
1517 if (thread == Thread::current()) {
1518 while (!thread->is_in_stack((address)v0)) {
1519 v0 = _values.at(++min_index).location;
1520 }
1521 while (!thread->is_in_stack((address)v1)) {
1522 v1 = _values.at(--max_index).location;
1523 }
1524 } else {
1525 while (!thread->on_local_stack((address)v0)) {
1526 v0 = _values.at(++min_index).location;
1527 }
1528 while (!thread->on_local_stack((address)v1)) {
1529 v1 = _values.at(--max_index).location;
1530 }
1531 }
1532 intptr_t* min = MIN2(v0, v1);
1533 intptr_t* max = MAX2(v0, v1);
1534 intptr_t* cur = max;
1535 intptr_t* last = NULL;
1536 for (int i = max_index; i >= min_index; i--) {
1537 FrameValue fv = _values.at(i);
1538 while (cur > fv.location) {
1539 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur);
1540 cur--;
1541 }
1542 if (last == fv.location) {
1543 const char* spacer = " " LP64_ONLY(" ");
1544 tty->print_cr(" %s %s %s", spacer, spacer, fv.description);
1545 } else {
1546 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1547 last = fv.location;
1548 cur--;
1549 }
1550 }
1551 }
1552
1553 #endif // ndef PRODUCT