1 /*
2 * Copyright (c) 1997, 2017, 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 "classfile/javaClasses.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/debugInfoRec.hpp"
31 #include "code/nmethod.hpp"
32 #include "code/pcDesc.hpp"
33 #include "code/scopeDesc.hpp"
34 #include "interpreter/interpreter.hpp"
35 #include "interpreter/oopMapCache.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "runtime/frame.inline.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/objectMonitor.hpp"
42 #include "runtime/objectMonitor.inline.hpp"
43 #include "runtime/signature.hpp"
44 #include "runtime/stubRoutines.hpp"
45 #include "runtime/synchronizer.hpp"
46 #include "runtime/vframe.inline.hpp"
47 #include "runtime/vframeArray.hpp"
48 #include "runtime/vframe_hp.hpp"
49
50 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
51 : _reg_map(reg_map), _thread(thread) {
52 assert(fr != NULL, "must have frame");
53 _fr = *fr;
54 }
55
56 vframe::vframe(const frame* fr, JavaThread* thread)
57 : _reg_map(thread), _thread(thread) {
58 assert(fr != NULL, "must have frame");
59 _fr = *fr;
60 }
61
62 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
63 // Interpreter frame
64 if (f->is_interpreted_frame()) {
65 return new interpretedVFrame(f, reg_map, thread);
66 }
67
68 // Compiled frame
69 CodeBlob* cb = f->cb();
70 if (cb != NULL) {
71 if (cb->is_compiled()) {
72 CompiledMethod* nm = (CompiledMethod*)cb;
73 return new compiledVFrame(f, reg_map, thread, nm);
74 }
75
76 if (f->is_runtime_frame()) {
77 // Skip this frame and try again.
78 RegisterMap temp_map = *reg_map;
79 frame s = f->sender(&temp_map);
80 return new_vframe(&s, &temp_map, thread);
81 }
82 }
83
84 // External frame
85 return new externalVFrame(f, reg_map, thread);
86 }
87
88 vframe* vframe::sender() const {
89 RegisterMap temp_map = *register_map();
90 assert(is_top(), "just checking");
91 if (_fr.is_entry_frame() && _fr.is_first_frame()) return NULL;
92 frame s = _fr.real_sender(&temp_map);
93 if (s.is_first_frame()) return NULL;
94 return vframe::new_vframe(&s, &temp_map, thread());
95 }
96
97 vframe* vframe::top() const {
98 vframe* vf = (vframe*) this;
99 while (!vf->is_top()) vf = vf->sender();
100 return vf;
101 }
102
103
104 javaVFrame* vframe::java_sender() const {
105 vframe* f = sender();
106 while (f != NULL) {
107 if (f->is_java_frame()) return javaVFrame::cast(f);
108 f = f->sender();
109 }
110 return NULL;
111 }
112
113 // ------------- javaVFrame --------------
114
115 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
116 assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
117 "must be at safepoint or it's a java frame of the current thread");
118
119 GrowableArray<MonitorInfo*>* mons = monitors();
120 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
121 if (mons->is_empty()) return result;
122
123 bool found_first_monitor = false;
124 ObjectMonitor *pending_monitor = thread()->current_pending_monitor();
125 ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
126 oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : (oop) NULL);
127 oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : (oop) NULL);
128
129 for (int index = (mons->length()-1); index >= 0; index--) {
130 MonitorInfo* monitor = mons->at(index);
131 if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
132 oop obj = monitor->owner();
133 if (obj == NULL) continue; // skip unowned monitor
134 //
135 // Skip the monitor that the thread is blocked to enter or waiting on
136 //
137 if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
138 continue;
139 }
140 found_first_monitor = true;
141 result->append(monitor);
142 }
143 return result;
144 }
145
146 void javaVFrame::print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
147 if (obj.not_null()) {
148 st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, p2i(obj()));
149 if (obj->klass() == SystemDictionary::Class_klass()) {
150 st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
151 } else {
152 Klass* k = obj->klass();
153 st->print_cr("(a %s)", k->external_name());
154 }
155 }
156 }
157
158 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
159 Thread* THREAD = Thread::current();
160 ResourceMark rm(THREAD);
161
162 // If this is the first frame and it is java.lang.Object.wait(...)
163 // then print out the receiver. Locals are not always available,
164 // e.g., compiled native frames have no scope so there are no locals.
165 if (frame_count == 0) {
166 if (method()->name() == vmSymbols::wait_name() &&
167 method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
168 const char *wait_state = "waiting on"; // assume we are waiting
169 // If earlier in the output we reported java.lang.Thread.State ==
170 // "WAITING (on object monitor)" and now we report "waiting on", then
171 // we are still waiting for notification or timeout. Otherwise if
172 // we earlier reported java.lang.Thread.State == "BLOCKED (on object
173 // monitor)", then we are actually waiting to re-lock the monitor.
174 // At this level we can't distinguish the two cases to report
175 // "waited on" rather than "waiting on" for the second case.
176 StackValueCollection* locs = locals();
177 if (!locs->is_empty()) {
178 StackValue* sv = locs->at(0);
179 if (sv->type() == T_OBJECT) {
180 Handle o = locs->at(0)->get_obj();
181 print_locked_object_class_name(st, o, wait_state);
182 }
183 } else {
184 st->print_cr("\t- %s <no object reference available>", wait_state);
185 }
186 } else if (thread()->current_park_blocker() != NULL) {
187 oop obj = thread()->current_park_blocker();
188 Klass* k = obj->klass();
189 st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", p2i(obj), k->external_name());
190 }
191 }
192
193 // Print out all monitors that we have locked, or are trying to lock,
194 // including re-locking after being notified or timing out in a wait().
195 GrowableArray<MonitorInfo*>* mons = monitors();
196 if (!mons->is_empty()) {
197 bool found_first_monitor = false;
198 for (int index = (mons->length()-1); index >= 0; index--) {
199 MonitorInfo* monitor = mons->at(index);
200 if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
201 if (monitor->owner_is_scalar_replaced()) {
202 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
203 // format below for lockbits matches this one.
204 st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
205 } else {
206 Handle obj(THREAD, monitor->owner());
207 if (obj() != NULL) {
208 print_locked_object_class_name(st, obj, "eliminated");
209 }
210 }
211 continue;
212 }
213 if (monitor->owner() != NULL) {
214 // the monitor is associated with an object, i.e., it is locked
215
216 markOop mark = NULL;
217 const char *lock_state = "locked"; // assume we have the monitor locked
218 if (!found_first_monitor && frame_count == 0) {
219 // If this is the first frame and we haven't found an owned
220 // monitor before, then we need to see if we have completed
221 // the lock or if we are blocked trying to acquire it. Only
222 // an inflated monitor that is first on the monitor list in
223 // the first frame can block us on a monitor enter.
224 mark = monitor->owner()->mark();
225 if (mark->has_monitor() &&
226 ( // we have marked ourself as pending on this monitor
227 mark->monitor() == thread()->current_pending_monitor() ||
228 // we are not the owner of this monitor
229 !mark->monitor()->is_entered(thread())
230 )) {
231 lock_state = "waiting to lock";
232 } else {
233 // We own the monitor which is not as interesting so
234 // disable the extra printing below.
235 mark = NULL;
236 }
237 } else if (frame_count != 0) {
238 // This is not the first frame so we either own this monitor
239 // or we owned the monitor before and called wait(). Because
240 // wait() could have been called on any monitor in a lower
241 // numbered frame on the stack, we have to check all the
242 // monitors on the list for this frame.
243 mark = monitor->owner()->mark();
244 if (mark->has_monitor() &&
245 ( // we have marked ourself as pending on this monitor
246 mark->monitor() == thread()->current_pending_monitor() ||
247 // we are not the owner of this monitor
248 !mark->monitor()->is_entered(thread())
249 )) {
250 lock_state = "waiting to re-lock in wait()";
251 } else {
252 // We own the monitor which is not as interesting so
253 // disable the extra printing below.
254 mark = NULL;
255 }
256 }
257 print_locked_object_class_name(st, Handle(THREAD, monitor->owner()), lock_state);
258 if (ObjectMonitor::Knob_Verbose && mark != NULL) {
259 st->print("\t- lockbits=");
260 mark->print_on(st);
261 st->cr();
262 }
263
264 found_first_monitor = true;
265 }
266 }
267 }
268 }
269
270 // ------------- interpretedVFrame --------------
271
272 u_char* interpretedVFrame::bcp() const {
273 return fr().interpreter_frame_bcp();
274 }
275
276 void interpretedVFrame::set_bcp(u_char* bcp) {
277 fr().interpreter_frame_set_bcp(bcp);
278 }
279
280 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
281 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
282 return fr().interpreter_frame_local_at(offset);
283 }
284
285
286 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
287 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
288 for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
289 current >= fr().interpreter_frame_monitor_end();
290 current = fr().previous_monitor_in_interpreter_frame(current)) {
291 result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
292 }
293 return result;
294 }
295
296 int interpretedVFrame::bci() const {
297 return method()->bci_from(bcp());
298 }
299
300 Method* interpretedVFrame::method() const {
301 return fr().interpreter_frame_method();
302 }
303
304 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
305 int index,
306 const intptr_t* const addr) {
307
308 assert(index >= 0 &&
309 index < oop_mask.number_of_entries(), "invariant");
310
311 // categorize using oop_mask
312 if (oop_mask.is_oop(index)) {
313 // reference (oop) "r"
314 Handle h(Thread::current(), addr != NULL ? (*(oop*)addr) : (oop)NULL);
315 return new StackValue(h);
316 }
317 // value (integer) "v"
318 return new StackValue(addr != NULL ? *addr : 0);
319 }
320
321 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
322 assert(addr != NULL, "invariant");
323
324 // Ensure to be 'inside' the expresion stack (i.e., addr >= sp for Intel).
325 // In case of exceptions, the expression stack is invalid and the sp
326 // will be reset to express this condition.
327 if (frame::interpreter_frame_expression_stack_direction() > 0) {
328 return addr <= fr.interpreter_frame_tos_address();
329 }
330
331 return addr >= fr.interpreter_frame_tos_address();
332 }
333
334 static void stack_locals(StackValueCollection* result,
335 int length,
336 const InterpreterOopMap& oop_mask,
337 const frame& fr) {
338
339 assert(result != NULL, "invariant");
340
341 for (int i = 0; i < length; ++i) {
342 const intptr_t* const addr = fr.interpreter_frame_local_at(i);
343 assert(addr != NULL, "invariant");
344 assert(addr >= fr.sp(), "must be inside the frame");
345
346 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr);
347 assert(sv != NULL, "sanity check");
348
349 result->add(sv);
350 }
351 }
352
353 static void stack_expressions(StackValueCollection* result,
354 int length,
355 int max_locals,
356 const InterpreterOopMap& oop_mask,
357 const frame& fr) {
358
359 assert(result != NULL, "invariant");
360
361 for (int i = 0; i < length; ++i) {
362 const intptr_t* addr = fr.interpreter_frame_expression_stack_at(i);
363 assert(addr != NULL, "invariant");
364 if (!is_in_expression_stack(fr, addr)) {
365 // Need to ensure no bogus escapes.
366 addr = NULL;
367 }
368
369 StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
370 i + max_locals,
371 addr);
372 assert(sv != NULL, "sanity check");
373
374 result->add(sv);
375 }
376 }
377
378 StackValueCollection* interpretedVFrame::locals() const {
379 return stack_data(false);
380 }
381
382 StackValueCollection* interpretedVFrame::expressions() const {
383 return stack_data(true);
384 }
385
386 /*
387 * Worker routine for fetching references and/or values
388 * for a particular bci in the interpretedVFrame.
389 *
390 * Returns data for either "locals" or "expressions",
391 * using bci relative oop_map (oop_mask) information.
392 *
393 * @param expressions bool switch controlling what data to return
394 (false == locals / true == expression)
395 *
396 */
397 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
398
399 InterpreterOopMap oop_mask;
400 method()->mask_for(bci(), &oop_mask);
401 const int mask_len = oop_mask.number_of_entries();
402
403 // If the method is native, method()->max_locals() is not telling the truth.
404 // For our purposes, max locals instead equals the size of parameters.
405 const int max_locals = method()->is_native() ?
406 method()->size_of_parameters() : method()->max_locals();
407
408 assert(mask_len >= max_locals, "invariant");
409
410 const int length = expressions ? mask_len - max_locals : max_locals;
411 assert(length >= 0, "invariant");
412
413 StackValueCollection* const result = new StackValueCollection(length);
414
415 if (0 == length) {
416 return result;
417 }
418
419 if (expressions) {
420 stack_expressions(result, length, max_locals, oop_mask, fr());
421 } else {
422 stack_locals(result, length, oop_mask, fr());
423 }
424
425 assert(length == result->size(), "invariant");
426
427 return result;
428 }
429
430 void interpretedVFrame::set_locals(StackValueCollection* values) const {
431 if (values == NULL || values->size() == 0) return;
432
433 // If the method is native, max_locals is not telling the truth.
434 // maxlocals then equals the size of parameters
435 const int max_locals = method()->is_native() ?
436 method()->size_of_parameters() : method()->max_locals();
437
438 assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
439
440 // handle locals
441 for (int i = 0; i < max_locals; i++) {
442 // Find stack location
443 intptr_t *addr = locals_addr_at(i);
444
445 // Depending on oop/int put it in the right package
446 const StackValue* const sv = values->at(i);
447 assert(sv != NULL, "sanity check");
448 if (sv->type() == T_OBJECT) {
449 *(oop *) addr = (sv->get_obj())();
450 } else { // integer
451 *addr = sv->get_int();
452 }
453 }
454 }
455
456 // ------------- cChunk --------------
457
458 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
459 : externalVFrame(fr, reg_map, thread) {}
460
461 #ifdef ASSERT
462 void vframeStreamCommon::found_bad_method_frame() const {
463 // 6379830 Cut point for an assertion that occasionally fires when
464 // we are using the performance analyzer.
465 // Disable this assert when testing the analyzer with fastdebug.
466 // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
467 fatal("invalid bci or invalid scope desc");
468 }
469 #endif
470
471 // top-frame will be skipped
472 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
473 bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
474 _stop_at_java_call_stub = stop_at_java_call_stub;
475
476 // skip top frame, as it may not be at safepoint
477 _frame = top_frame.sender(&_reg_map);
478 while (!fill_from_frame()) {
479 _frame = _frame.sender(&_reg_map);
480 }
481 }
482
483
484 // Step back n frames, skip any pseudo frames in between.
485 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
486 // AccessController.doPrivileged.
487 void vframeStreamCommon::security_get_caller_frame(int depth) {
488 assert(depth >= 0, "invalid depth: %d", depth);
489 for (int n = 0; !at_end(); security_next()) {
490 if (!method()->is_ignored_by_security_stack_walk()) {
491 if (n == depth) {
492 // We have reached the desired depth; return.
493 return;
494 }
495 n++; // this is a non-skipped frame; count it against the depth
496 }
497 }
498 // NOTE: At this point there were not enough frames on the stack
499 // to walk to depth. Callers of this method have to check for at_end.
500 }
501
502
503 void vframeStreamCommon::security_next() {
504 if (method()->is_prefixed_native()) {
505 skip_prefixed_method_and_wrappers(); // calls next()
506 } else {
507 next();
508 }
509 }
510
511
512 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
513 ResourceMark rm;
514 HandleMark hm;
515
516 int method_prefix_count = 0;
517 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
518 Klass* prefixed_klass = method()->method_holder();
519 const char* prefixed_name = method()->name()->as_C_string();
520 size_t prefixed_name_len = strlen(prefixed_name);
521 int prefix_index = method_prefix_count-1;
522
523 while (!at_end()) {
524 next();
525 if (method()->method_holder() != prefixed_klass) {
526 break; // classes don't match, can't be a wrapper
527 }
528 const char* name = method()->name()->as_C_string();
529 size_t name_len = strlen(name);
530 size_t prefix_len = prefixed_name_len - name_len;
531 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
532 break; // prefixed name isn't prefixed version of method name, can't be a wrapper
533 }
534 for (; prefix_index >= 0; --prefix_index) {
535 const char* possible_prefix = method_prefixes[prefix_index];
536 size_t possible_prefix_len = strlen(possible_prefix);
537 if (possible_prefix_len == prefix_len &&
538 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
539 break; // matching prefix found
540 }
541 }
542 if (prefix_index < 0) {
543 break; // didn't find the prefix, can't be a wrapper
544 }
545 prefixed_name = name;
546 prefixed_name_len = name_len;
547 }
548 }
549
550
551 void vframeStreamCommon::skip_reflection_related_frames() {
552 while (!at_end() &&
553 (method()->method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) ||
554 method()->method_holder()->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass()))) {
555 next();
556 }
557 }
558
559
560 #ifndef PRODUCT
561 void vframe::print() {
562 if (WizardMode) _fr.print_value_on(tty,NULL);
563 }
564
565
566 void vframe::print_value() const {
567 ((vframe*)this)->print();
568 }
569
570
571 void entryVFrame::print_value() const {
572 ((entryVFrame*)this)->print();
573 }
574
575 void entryVFrame::print() {
576 vframe::print();
577 tty->print_cr("C Chunk inbetween Java");
578 tty->print_cr("C link " INTPTR_FORMAT, p2i(_fr.link()));
579 }
580
581
582 // ------------- javaVFrame --------------
583
584 static void print_stack_values(const char* title, StackValueCollection* values) {
585 if (values->is_empty()) return;
586 tty->print_cr("\t%s:", title);
587 values->print();
588 }
589
590
591 void javaVFrame::print() {
592 ResourceMark rm;
593 vframe::print();
594 tty->print("\t");
595 method()->print_value();
596 tty->cr();
597 tty->print_cr("\tbci: %d", bci());
598
599 print_stack_values("locals", locals());
600 print_stack_values("expressions", expressions());
601
602 GrowableArray<MonitorInfo*>* list = monitors();
603 if (list->is_empty()) return;
604 tty->print_cr("\tmonitor list:");
605 for (int index = (list->length()-1); index >= 0; index--) {
606 MonitorInfo* monitor = list->at(index);
607 tty->print("\t obj\t");
608 if (monitor->owner_is_scalar_replaced()) {
609 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
610 tty->print("( is scalar replaced %s)", k->external_name());
611 } else if (monitor->owner() == NULL) {
612 tty->print("( null )");
613 } else {
614 monitor->owner()->print_value();
615 tty->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
616 }
617 if (monitor->eliminated()) {
618 if(is_compiled_frame()) {
619 tty->print(" ( lock is eliminated in compiled frame )");
620 } else {
621 tty->print(" ( lock is eliminated, frame not compiled )");
622 }
623 }
624 tty->cr();
625 tty->print("\t ");
626 monitor->lock()->print_on(tty);
627 tty->cr();
628 }
629 }
630
631
632 void javaVFrame::print_value() const {
633 Method* m = method();
634 InstanceKlass* k = m->method_holder();
635 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
636 p2i(_fr.sp()), p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
637 tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
638
639 if (!m->is_native()) {
640 Symbol* source_name = k->source_file_name();
641 int line_number = m->line_number_from_bci(bci());
642 if (source_name != NULL && (line_number != -1)) {
643 tty->print("(%s:%d)", source_name->as_C_string(), line_number);
644 }
645 } else {
646 tty->print("(Native Method)");
647 }
648 // Check frame size and print warning if it looks suspiciously large
649 if (fr().sp() != NULL) {
650 RegisterMap map = *register_map();
651 uint size = fr().frame_size(&map);
652 #ifdef _LP64
653 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
654 #else
655 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
656 #endif
657 }
658 }
659
660
661 bool javaVFrame::structural_compare(javaVFrame* other) {
662 // Check static part
663 if (method() != other->method()) return false;
664 if (bci() != other->bci()) return false;
665
666 // Check locals
667 StackValueCollection *locs = locals();
668 StackValueCollection *other_locs = other->locals();
669 assert(locs->size() == other_locs->size(), "sanity check");
670 int i;
671 for(i = 0; i < locs->size(); i++) {
672 // it might happen the compiler reports a conflict and
673 // the interpreter reports a bogus int.
674 if ( is_compiled_frame() && locs->at(i)->type() == T_CONFLICT) continue;
675 if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
676
677 if (!locs->at(i)->equal(other_locs->at(i)))
678 return false;
679 }
680
681 // Check expressions
682 StackValueCollection* exprs = expressions();
683 StackValueCollection* other_exprs = other->expressions();
684 assert(exprs->size() == other_exprs->size(), "sanity check");
685 for(i = 0; i < exprs->size(); i++) {
686 if (!exprs->at(i)->equal(other_exprs->at(i)))
687 return false;
688 }
689
690 return true;
691 }
692
693
694 void javaVFrame::print_activation(int index) const {
695 // frame number and method
696 tty->print("%2d - ", index);
697 ((vframe*)this)->print_value();
698 tty->cr();
699
700 if (WizardMode) {
701 ((vframe*)this)->print();
702 tty->cr();
703 }
704 }
705
706
707 void javaVFrame::verify() const {
708 }
709
710
711 void interpretedVFrame::verify() const {
712 }
713
714
715 // ------------- externalVFrame --------------
716
717 void externalVFrame::print() {
718 _fr.print_value_on(tty,NULL);
719 }
720
721
722 void externalVFrame::print_value() const {
723 ((vframe*)this)->print();
724 }
725 #endif // PRODUCT