1 /*
2 * Copyright (c) 1997, 2020, 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.inline.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/thread.inline.hpp"
47 #include "runtime/vframe.inline.hpp"
48 #include "runtime/vframeArray.hpp"
49 #include "runtime/vframe_hp.hpp"
50
51 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
52 : _reg_map(reg_map), _thread(thread) {
53 assert(fr != NULL, "must have frame");
54 _fr = *fr;
55 }
56
57 vframe::vframe(const frame* fr, JavaThread* thread)
58 : _reg_map(thread), _thread(thread) {
59 assert(fr != NULL, "must have frame");
60 _fr = *fr;
61 }
62
63 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
64 // Interpreter frame
65 if (f->is_interpreted_frame()) {
66 return new interpretedVFrame(f, reg_map, thread);
67 }
68
69 // Compiled frame
70 CodeBlob* cb = f->cb();
71 if (cb != NULL) {
72 if (cb->is_compiled()) {
73 CompiledMethod* nm = (CompiledMethod*)cb;
74 return new compiledVFrame(f, reg_map, thread, nm);
75 }
76
77 if (f->is_runtime_frame()) {
78 // Skip this frame and try again.
79 RegisterMap temp_map = *reg_map;
80 frame s = f->sender(&temp_map);
81 return new_vframe(&s, &temp_map, thread);
82 }
83 }
84
85 // External frame
86 return new externalVFrame(f, reg_map, thread);
87 }
88
89 vframe* vframe::sender() const {
90 RegisterMap temp_map = *register_map();
91 assert(is_top(), "just checking");
92 if (_fr.is_entry_frame() && _fr.is_first_frame()) return NULL;
93 frame s = _fr.real_sender(&temp_map);
94 if (s.is_first_frame()) return NULL;
95 return vframe::new_vframe(&s, &temp_map, thread());
96 }
97
98 vframe* vframe::top() const {
99 vframe* vf = (vframe*) this;
100 while (!vf->is_top()) vf = vf->sender();
101 return vf;
102 }
103
104
105 javaVFrame* vframe::java_sender() const {
106 vframe* f = sender();
107 while (f != NULL) {
108 if (f->is_java_frame()) return javaVFrame::cast(f);
109 f = f->sender();
110 }
111 return NULL;
112 }
113
114 // ------------- javaVFrame --------------
115
116 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
117 assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
118 "must be at safepoint or it's a java frame of the current thread");
119
120 GrowableArray<MonitorInfo*>* mons = monitors();
121 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
122 if (mons->is_empty()) return result;
123
124 bool found_first_monitor = false;
125 // The ObjectMonitor* can't be async deflated since we are either
126 // at a safepoint or the calling thread is operating on itself so
127 // it cannot exit the ObjectMonitor so it remains busy.
128 ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
129 ObjectMonitor *pending_monitor = NULL;
130 if (waiting_monitor == NULL) {
131 pending_monitor = thread()->current_pending_monitor();
132 }
133 oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : (oop) NULL);
134 oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : (oop) NULL);
135
136 for (int index = (mons->length()-1); index >= 0; index--) {
137 MonitorInfo* monitor = mons->at(index);
138 if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
139 oop obj = monitor->owner();
140 if (obj == NULL) continue; // skip unowned monitor
141 //
142 // Skip the monitor that the thread is blocked to enter or waiting on
143 //
144 if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
145 continue;
146 }
147 found_first_monitor = true;
148 result->append(monitor);
149 }
150 return result;
151 }
152
153 void javaVFrame::print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
154 if (obj.not_null()) {
155 st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, p2i(obj()));
156 if (obj->klass() == SystemDictionary::Class_klass()) {
157 st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
158 } else {
159 Klass* k = obj->klass();
160 st->print_cr("(a %s)", k->external_name());
161 }
162 }
163 }
164
165 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
166 Thread* THREAD = Thread::current();
167 ResourceMark rm(THREAD);
168
169 // If this is the first frame and it is java.lang.Object.wait(...)
170 // then print out the receiver. Locals are not always available,
171 // e.g., compiled native frames have no scope so there are no locals.
172 if (frame_count == 0) {
173 if (method()->name() == vmSymbols::wait_name() &&
174 method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
175 const char *wait_state = "waiting on"; // assume we are waiting
176 // If earlier in the output we reported java.lang.Thread.State ==
177 // "WAITING (on object monitor)" and now we report "waiting on", then
178 // we are still waiting for notification or timeout. Otherwise if
179 // we earlier reported java.lang.Thread.State == "BLOCKED (on object
180 // monitor)", then we are actually waiting to re-lock the monitor.
181 StackValueCollection* locs = locals();
182 if (!locs->is_empty()) {
183 StackValue* sv = locs->at(0);
184 if (sv->type() == T_OBJECT) {
185 Handle o = locs->at(0)->get_obj();
186 if (java_lang_Thread::get_thread_status(thread()->threadObj()) ==
187 java_lang_Thread::BLOCKED_ON_MONITOR_ENTER) {
188 wait_state = "waiting to re-lock in wait()";
189 }
190 print_locked_object_class_name(st, o, wait_state);
191 }
192 } else {
193 st->print_cr("\t- %s <no object reference available>", wait_state);
194 }
195 } else if (thread()->current_park_blocker() != NULL) {
196 oop obj = thread()->current_park_blocker();
197 Klass* k = obj->klass();
198 st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", p2i(obj), k->external_name());
199 }
200 else if (thread()->osthread()->get_state() == OBJECT_WAIT) {
201 // We are waiting on an Object monitor but Object.wait() isn't the
202 // top-frame, so we should be waiting on a Class initialization monitor.
203 InstanceKlass* k = thread()->class_to_be_initialized();
204 if (k != NULL) {
205 st->print_cr("\t- waiting on the Class initialization monitor for %s", k->external_name());
206 }
207 }
208 }
209
210 // Print out all monitors that we have locked, or are trying to lock,
211 // including re-locking after being notified or timing out in a wait().
212 GrowableArray<MonitorInfo*>* mons = monitors();
213 if (!mons->is_empty()) {
214 bool found_first_monitor = false;
215 for (int index = (mons->length()-1); index >= 0; index--) {
216 MonitorInfo* monitor = mons->at(index);
217 if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
218 if (monitor->owner_is_scalar_replaced()) {
219 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
220 st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
221 } else {
222 Handle obj(THREAD, monitor->owner());
223 if (obj() != NULL) {
224 print_locked_object_class_name(st, obj, "eliminated");
225 }
226 }
227 continue;
228 }
229 if (monitor->owner() != NULL) {
230 // the monitor is associated with an object, i.e., it is locked
231
232 const char *lock_state = "locked"; // assume we have the monitor locked
233 if (!found_first_monitor && frame_count == 0) {
234 // If this is the first frame and we haven't found an owned
235 // monitor before, then we need to see if we have completed
236 // the lock or if we are blocked trying to acquire it. Only
237 // an inflated monitor that is first on the monitor list in
238 // the first frame can block us on a monitor enter.
239 markWord mark = monitor->owner()->mark();
240 // The first stage of async deflation does not affect any field
241 // used by this comparison so the ObjectMonitor* is usable here.
242 if (mark.has_monitor() &&
243 ( // we have marked ourself as pending on this monitor
244 mark.monitor() == thread()->current_pending_monitor() ||
245 // we are not the owner of this monitor
246 !mark.monitor()->is_entered(thread())
247 )) {
248 lock_state = "waiting to lock";
249 }
250 }
251 print_locked_object_class_name(st, Handle(THREAD, monitor->owner()), lock_state);
252
253 found_first_monitor = true;
254 }
255 }
256 }
257 }
258
259 // ------------- interpretedVFrame --------------
260
261 u_char* interpretedVFrame::bcp() const {
262 return fr().interpreter_frame_bcp();
263 }
264
265 void interpretedVFrame::set_bcp(u_char* bcp) {
266 fr().interpreter_frame_set_bcp(bcp);
267 }
268
269 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
270 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
271 return fr().interpreter_frame_local_at(offset);
272 }
273
274
275 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
276 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
277 for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
278 current >= fr().interpreter_frame_monitor_end();
279 current = fr().previous_monitor_in_interpreter_frame(current)) {
280 result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
281 }
282 return result;
283 }
284
285 int interpretedVFrame::bci() const {
286 return method()->bci_from(bcp());
287 }
288
289 Method* interpretedVFrame::method() const {
290 return fr().interpreter_frame_method();
291 }
292
293 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
294 int index,
295 const intptr_t* const addr) {
296
297 assert(index >= 0 &&
298 index < oop_mask.number_of_entries(), "invariant");
299
300 // categorize using oop_mask
301 if (oop_mask.is_oop(index)) {
302 // reference (oop) "r"
303 Handle h(Thread::current(), addr != NULL ? (*(oop*)addr) : (oop)NULL);
304 return new StackValue(h);
305 }
306 // value (integer) "v"
307 return new StackValue(addr != NULL ? *addr : 0);
308 }
309
310 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
311 assert(addr != NULL, "invariant");
312
313 // Ensure to be 'inside' the expresion stack (i.e., addr >= sp for Intel).
314 // In case of exceptions, the expression stack is invalid and the sp
315 // will be reset to express this condition.
316 if (frame::interpreter_frame_expression_stack_direction() > 0) {
317 return addr <= fr.interpreter_frame_tos_address();
318 }
319
320 return addr >= fr.interpreter_frame_tos_address();
321 }
322
323 static void stack_locals(StackValueCollection* result,
324 int length,
325 const InterpreterOopMap& oop_mask,
326 const frame& fr) {
327
328 assert(result != NULL, "invariant");
329
330 for (int i = 0; i < length; ++i) {
331 const intptr_t* const addr = fr.interpreter_frame_local_at(i);
332 assert(addr != NULL, "invariant");
333 assert(addr >= fr.sp(), "must be inside the frame");
334
335 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr);
336 assert(sv != NULL, "sanity check");
337
338 result->add(sv);
339 }
340 }
341
342 static void stack_expressions(StackValueCollection* result,
343 int length,
344 int max_locals,
345 const InterpreterOopMap& oop_mask,
346 const frame& fr) {
347
348 assert(result != NULL, "invariant");
349
350 for (int i = 0; i < length; ++i) {
351 const intptr_t* addr = fr.interpreter_frame_expression_stack_at(i);
352 assert(addr != NULL, "invariant");
353 if (!is_in_expression_stack(fr, addr)) {
354 // Need to ensure no bogus escapes.
355 addr = NULL;
356 }
357
358 StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
359 i + max_locals,
360 addr);
361 assert(sv != NULL, "sanity check");
362
363 result->add(sv);
364 }
365 }
366
367 StackValueCollection* interpretedVFrame::locals() const {
368 return stack_data(false);
369 }
370
371 StackValueCollection* interpretedVFrame::expressions() const {
372 return stack_data(true);
373 }
374
375 /*
376 * Worker routine for fetching references and/or values
377 * for a particular bci in the interpretedVFrame.
378 *
379 * Returns data for either "locals" or "expressions",
380 * using bci relative oop_map (oop_mask) information.
381 *
382 * @param expressions bool switch controlling what data to return
383 (false == locals / true == expression)
384 *
385 */
386 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
387
388 InterpreterOopMap oop_mask;
389 method()->mask_for(bci(), &oop_mask);
390 const int mask_len = oop_mask.number_of_entries();
391
392 // If the method is native, method()->max_locals() is not telling the truth.
393 // For our purposes, max locals instead equals the size of parameters.
394 const int max_locals = method()->is_native() ?
395 method()->size_of_parameters() : method()->max_locals();
396
397 assert(mask_len >= max_locals, "invariant");
398
399 const int length = expressions ? mask_len - max_locals : max_locals;
400 assert(length >= 0, "invariant");
401
402 StackValueCollection* const result = new StackValueCollection(length);
403
404 if (0 == length) {
405 return result;
406 }
407
408 if (expressions) {
409 stack_expressions(result, length, max_locals, oop_mask, fr());
410 } else {
411 stack_locals(result, length, oop_mask, fr());
412 }
413
414 assert(length == result->size(), "invariant");
415
416 return result;
417 }
418
419 void interpretedVFrame::set_locals(StackValueCollection* values) const {
420 if (values == NULL || values->size() == 0) return;
421
422 // If the method is native, max_locals is not telling the truth.
423 // maxlocals then equals the size of parameters
424 const int max_locals = method()->is_native() ?
425 method()->size_of_parameters() : method()->max_locals();
426
427 assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
428
429 // handle locals
430 for (int i = 0; i < max_locals; i++) {
431 // Find stack location
432 intptr_t *addr = locals_addr_at(i);
433
434 // Depending on oop/int put it in the right package
435 const StackValue* const sv = values->at(i);
436 assert(sv != NULL, "sanity check");
437 if (sv->type() == T_OBJECT) {
438 *(oop *) addr = (sv->get_obj())();
439 } else { // integer
440 *addr = sv->get_int();
441 }
442 }
443 }
444
445 // ------------- cChunk --------------
446
447 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
448 : externalVFrame(fr, reg_map, thread) {}
449
450 #ifdef ASSERT
451 void vframeStreamCommon::found_bad_method_frame() const {
452 // 6379830 Cut point for an assertion that occasionally fires when
453 // we are using the performance analyzer.
454 // Disable this assert when testing the analyzer with fastdebug.
455 // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
456 fatal("invalid bci or invalid scope desc");
457 }
458 #endif
459
460 // top-frame will be skipped
461 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
462 bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
463 _stop_at_java_call_stub = stop_at_java_call_stub;
464
465 // skip top frame, as it may not be at safepoint
466 _prev_frame = top_frame;
467 _frame = top_frame.sender(&_reg_map);
468 while (!fill_from_frame()) {
469 _prev_frame = _frame;
470 _frame = _frame.sender(&_reg_map);
471 }
472 }
473
474
475 // Step back n frames, skip any pseudo frames in between.
476 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
477 // AccessController.doPrivileged.
478 void vframeStreamCommon::security_get_caller_frame(int depth) {
479 assert(depth >= 0, "invalid depth: %d", depth);
480 for (int n = 0; !at_end(); security_next()) {
481 if (!method()->is_ignored_by_security_stack_walk()) {
482 if (n == depth) {
483 // We have reached the desired depth; return.
484 return;
485 }
486 n++; // this is a non-skipped frame; count it against the depth
487 }
488 }
489 // NOTE: At this point there were not enough frames on the stack
490 // to walk to depth. Callers of this method have to check for at_end.
491 }
492
493
494 void vframeStreamCommon::security_next() {
495 if (method()->is_prefixed_native()) {
496 skip_prefixed_method_and_wrappers(); // calls next()
497 } else {
498 next();
499 }
500 }
501
502
503 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
504 ResourceMark rm;
505 HandleMark hm;
506
507 int method_prefix_count = 0;
508 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
509 Klass* prefixed_klass = method()->method_holder();
510 const char* prefixed_name = method()->name()->as_C_string();
511 size_t prefixed_name_len = strlen(prefixed_name);
512 int prefix_index = method_prefix_count-1;
513
514 while (!at_end()) {
515 next();
516 if (method()->method_holder() != prefixed_klass) {
517 break; // classes don't match, can't be a wrapper
518 }
519 const char* name = method()->name()->as_C_string();
520 size_t name_len = strlen(name);
521 size_t prefix_len = prefixed_name_len - name_len;
522 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
523 break; // prefixed name isn't prefixed version of method name, can't be a wrapper
524 }
525 for (; prefix_index >= 0; --prefix_index) {
526 const char* possible_prefix = method_prefixes[prefix_index];
527 size_t possible_prefix_len = strlen(possible_prefix);
528 if (possible_prefix_len == prefix_len &&
529 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
530 break; // matching prefix found
531 }
532 }
533 if (prefix_index < 0) {
534 break; // didn't find the prefix, can't be a wrapper
535 }
536 prefixed_name = name;
537 prefixed_name_len = name_len;
538 }
539 }
540
541
542 void vframeStreamCommon::skip_reflection_related_frames() {
543 while (!at_end() &&
544 (method()->method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) ||
545 method()->method_holder()->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass()))) {
546 next();
547 }
548 }
549
550 javaVFrame* vframeStreamCommon::asJavaVFrame() {
551 javaVFrame* result = NULL;
552 if (_mode == compiled_mode) {
553 guarantee(_frame.is_compiled_frame(), "expected compiled Java frame");
554
555 // lazy update to register map
556 bool update_map = true;
557 RegisterMap map(_thread, update_map);
558 frame f = _prev_frame.sender(&map);
559
560 guarantee(f.is_compiled_frame(), "expected compiled Java frame");
561
562 compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&f, &map, _thread));
563
564 guarantee(cvf->cb() == cb(), "wrong code blob");
565
566 // get the same scope as this stream
567 cvf = cvf->at_scope(_decode_offset, _vframe_id);
568
569 guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope");
570 guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope");
571 guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe");
572
573 result = cvf;
574 } else {
575 result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
576 }
577 guarantee(result->method() == method(), "wrong method");
578 return result;
579 }
580
581
582 #ifndef PRODUCT
583 void vframe::print() {
584 if (WizardMode) _fr.print_value_on(tty,NULL);
585 }
586
587
588 void vframe::print_value() const {
589 ((vframe*)this)->print();
590 }
591
592
593 void entryVFrame::print_value() const {
594 ((entryVFrame*)this)->print();
595 }
596
597 void entryVFrame::print() {
598 vframe::print();
599 tty->print_cr("C Chunk inbetween Java");
600 tty->print_cr("C link " INTPTR_FORMAT, p2i(_fr.link()));
601 }
602
603
604 // ------------- javaVFrame --------------
605
606 static void print_stack_values(const char* title, StackValueCollection* values) {
607 if (values->is_empty()) return;
608 tty->print_cr("\t%s:", title);
609 values->print();
610 }
611
612
613 void javaVFrame::print() {
614 ResourceMark rm;
615 vframe::print();
616 tty->print("\t");
617 method()->print_value();
618 tty->cr();
619 tty->print_cr("\tbci: %d", bci());
620
621 print_stack_values("locals", locals());
622 print_stack_values("expressions", expressions());
623
624 GrowableArray<MonitorInfo*>* list = monitors();
625 if (list->is_empty()) return;
626 tty->print_cr("\tmonitor list:");
627 for (int index = (list->length()-1); index >= 0; index--) {
628 MonitorInfo* monitor = list->at(index);
629 tty->print("\t obj\t");
630 if (monitor->owner_is_scalar_replaced()) {
631 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
632 tty->print("( is scalar replaced %s)", k->external_name());
633 } else if (monitor->owner() == NULL) {
634 tty->print("( null )");
635 } else {
636 monitor->owner()->print_value();
637 tty->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
638 }
639 if (monitor->eliminated()) {
640 if(is_compiled_frame()) {
641 tty->print(" ( lock is eliminated in compiled frame )");
642 } else {
643 tty->print(" ( lock is eliminated, frame not compiled )");
644 }
645 }
646 tty->cr();
647 tty->print("\t ");
648 monitor->lock()->print_on(tty);
649 tty->cr();
650 }
651 }
652
653
654 void javaVFrame::print_value() const {
655 Method* m = method();
656 InstanceKlass* k = m->method_holder();
657 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
658 p2i(_fr.sp()), p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
659 tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
660
661 if (!m->is_native()) {
662 Symbol* source_name = k->source_file_name();
663 int line_number = m->line_number_from_bci(bci());
664 if (source_name != NULL && (line_number != -1)) {
665 tty->print("(%s:%d)", source_name->as_C_string(), line_number);
666 }
667 } else {
668 tty->print("(Native Method)");
669 }
670 // Check frame size and print warning if it looks suspiciously large
671 if (fr().sp() != NULL) {
672 RegisterMap map = *register_map();
673 uint size = fr().frame_size(&map);
674 #ifdef _LP64
675 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
676 #else
677 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
678 #endif
679 }
680 }
681
682
683 bool javaVFrame::structural_compare(javaVFrame* other) {
684 // Check static part
685 if (method() != other->method()) return false;
686 if (bci() != other->bci()) return false;
687
688 // Check locals
689 StackValueCollection *locs = locals();
690 StackValueCollection *other_locs = other->locals();
691 assert(locs->size() == other_locs->size(), "sanity check");
692 int i;
693 for(i = 0; i < locs->size(); i++) {
694 // it might happen the compiler reports a conflict and
695 // the interpreter reports a bogus int.
696 if ( is_compiled_frame() && locs->at(i)->type() == T_CONFLICT) continue;
697 if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
698
699 if (!locs->at(i)->equal(other_locs->at(i)))
700 return false;
701 }
702
703 // Check expressions
704 StackValueCollection* exprs = expressions();
705 StackValueCollection* other_exprs = other->expressions();
706 assert(exprs->size() == other_exprs->size(), "sanity check");
707 for(i = 0; i < exprs->size(); i++) {
708 if (!exprs->at(i)->equal(other_exprs->at(i)))
709 return false;
710 }
711
712 return true;
713 }
714
715
716 void javaVFrame::print_activation(int index) const {
717 // frame number and method
718 tty->print("%2d - ", index);
719 ((vframe*)this)->print_value();
720 tty->cr();
721
722 if (WizardMode) {
723 ((vframe*)this)->print();
724 tty->cr();
725 }
726 }
727
728
729 void javaVFrame::verify() const {
730 }
731
732
733 void interpretedVFrame::verify() const {
734 }
735
736
737 // ------------- externalVFrame --------------
738
739 void externalVFrame::print() {
740 _fr.print_value_on(tty,NULL);
741 }
742
743
744 void externalVFrame::print_value() const {
745 ((vframe*)this)->print();
746 }
747 #endif // PRODUCT