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comparison: src/share/vm/runtime/frame.cpp

src/share/vm/runtime/frame.cpp

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

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