1 /*
2 * Copyright (c) 1997, 2019, 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/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 ObjectMonitor *pending_monitor = thread()->current_pending_monitor();
126 ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
127 oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : (oop) NULL);
128 oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : (oop) NULL);
129
130 for (int index = (mons->length()-1); index >= 0; index--) {
131 MonitorInfo* monitor = mons->at(index);
132 if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
133 oop obj = monitor->owner();
134 if (obj == NULL) continue; // skip unowned monitor
135 //
136 // Skip the monitor that the thread is blocked to enter or waiting on
137 //
138 if (!found_first_monitor && (oopDesc::equals(obj, pending_obj) || oopDesc::equals(obj, waiting_obj))) {
139 continue;
140 }
141 found_first_monitor = true;
142 result->append(monitor);
143 }
144 return result;
145 }
146
147 void javaVFrame::print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
148 if (obj.not_null()) {
149 st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, p2i(obj()));
150 if (obj->klass() == SystemDictionary::Class_klass()) {
151 st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
152 } else {
153 Klass* k = obj->klass();
154 st->print_cr("(a %s)", k->external_name());
155 }
156 }
157 }
158
159 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
160 Thread* THREAD = Thread::current();
161 ResourceMark rm(THREAD);
162
163 // If this is the first frame and it is java.lang.Object.wait(...)
164 // then print out the receiver. Locals are not always available,
165 // e.g., compiled native frames have no scope so there are no locals.
166 if (frame_count == 0) {
167 if (method()->name() == vmSymbols::wait_name() &&
168 method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
169 const char *wait_state = "waiting on"; // assume we are waiting
170 // If earlier in the output we reported java.lang.Thread.State ==
171 // "WAITING (on object monitor)" and now we report "waiting on", then
172 // we are still waiting for notification or timeout. Otherwise if
173 // we earlier reported java.lang.Thread.State == "BLOCKED (on object
174 // monitor)", then we are actually waiting to re-lock the monitor.
175 StackValueCollection* locs = locals();
176 if (!locs->is_empty()) {
177 StackValue* sv = locs->at(0);
178 if (sv->type() == T_OBJECT) {
179 Handle o = locs->at(0)->get_obj();
180 if (java_lang_Thread::get_thread_status(thread()->threadObj()) ==
181 java_lang_Thread::BLOCKED_ON_MONITOR_ENTER) {
182 wait_state = "waiting to re-lock in wait()";
183 }
184 print_locked_object_class_name(st, o, wait_state);
185 }
186 } else {
187 st->print_cr("\t- %s <no object reference available>", wait_state);
188 }
189 } else if (thread()->current_park_blocker() != NULL) {
190 oop obj = thread()->current_park_blocker();
191 Klass* k = obj->klass();
192 st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", p2i(obj), k->external_name());
193 }
194 else if (thread()->osthread()->get_state() == OBJECT_WAIT) {
195 // We are waiting on an Object monitor but Object.wait() isn't the
196 // top-frame, so we should be waiting on a Class initialization monitor.
197 InstanceKlass* k = thread()->class_to_be_initialized();
198 if (k != NULL) {
199 st->print_cr("\t- waiting on the Class initialization monitor for %s", k->external_name());
200 }
201 }
202 }
203
204 // Print out all monitors that we have locked, or are trying to lock,
205 // including re-locking after being notified or timing out in a wait().
206 GrowableArray<MonitorInfo*>* mons = monitors();
207 if (!mons->is_empty()) {
208 bool found_first_monitor = false;
209 for (int index = (mons->length()-1); index >= 0; index--) {
210 MonitorInfo* monitor = mons->at(index);
211 if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
212 if (monitor->owner_is_scalar_replaced()) {
213 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
214 // format below for lockbits matches this one.
215 st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
216 } else {
217 Handle obj(THREAD, monitor->owner());
218 if (obj() != NULL) {
219 print_locked_object_class_name(st, obj, "eliminated");
220 }
221 }
222 continue;
223 }
224 if (monitor->owner() != NULL) {
225 // the monitor is associated with an object, i.e., it is locked
226
227 markWord mark(markWord::zero);
228 const char *lock_state = "locked"; // assume we have the monitor locked
229 if (!found_first_monitor && frame_count == 0) {
230 // If this is the first frame and we haven't found an owned
231 // monitor before, then we need to see if we have completed
232 // the lock or if we are blocked trying to acquire it. Only
233 // an inflated monitor that is first on the monitor list in
234 // the first frame can block us on a monitor enter.
235 mark = monitor->owner()->mark();
236 if (mark.has_monitor() &&
237 ( // we have marked ourself as pending on this monitor
238 mark.monitor() == thread()->current_pending_monitor() ||
239 // we are not the owner of this monitor
240 !mark.monitor()->is_entered(thread())
241 )) {
242 lock_state = "waiting to lock";
243 } else {
244 // FIXME: mark is set but not used below.
245 // Either the comment or the code is broken.
246
247 // We own the monitor which is not as interesting so
248 // disable the extra printing below.
249 mark = markWord(markWord::zero);
250 }
251 }
252 print_locked_object_class_name(st, Handle(THREAD, monitor->owner()), lock_state);
253
254 found_first_monitor = true;
255 }
256 }
257 }
258 }
259
260 // ------------- interpretedVFrame --------------
261
262 u_char* interpretedVFrame::bcp() const {
263 return fr().interpreter_frame_bcp();
264 }
265
266 void interpretedVFrame::set_bcp(u_char* bcp) {
267 fr().interpreter_frame_set_bcp(bcp);
268 }
269
270 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
271 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
272 return fr().interpreter_frame_local_at(offset);
273 }
274
275
276 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
277 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
278 for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
279 current >= fr().interpreter_frame_monitor_end();
280 current = fr().previous_monitor_in_interpreter_frame(current)) {
281 result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
282 }
283 return result;
284 }
285
286 int interpretedVFrame::bci() const {
287 return method()->bci_from(bcp());
288 }
289
290 Method* interpretedVFrame::method() const {
291 return fr().interpreter_frame_method();
292 }
293
294 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
295 int index,
296 const intptr_t* const addr) {
297
298 assert(index >= 0 &&
299 index < oop_mask.number_of_entries(), "invariant");
300
301 // categorize using oop_mask
302 if (oop_mask.is_oop(index)) {
303 // reference (oop) "r"
304 Handle h(Thread::current(), addr != NULL ? (*(oop*)addr) : (oop)NULL);
305 return new StackValue(h);
306 }
307 // value (integer) "v"
308 return new StackValue(addr != NULL ? *addr : 0);
309 }
310
311 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
312 assert(addr != NULL, "invariant");
313
314 // Ensure to be 'inside' the expresion stack (i.e., addr >= sp for Intel).
315 // In case of exceptions, the expression stack is invalid and the sp
316 // will be reset to express this condition.
317 if (frame::interpreter_frame_expression_stack_direction() > 0) {
318 return addr <= fr.interpreter_frame_tos_address();
319 }
320
321 return addr >= fr.interpreter_frame_tos_address();
322 }
323
324 static void stack_locals(StackValueCollection* result,
325 int length,
326 const InterpreterOopMap& oop_mask,
327 const frame& fr) {
328
329 assert(result != NULL, "invariant");
330
331 for (int i = 0; i < length; ++i) {
332 const intptr_t* const addr = fr.interpreter_frame_local_at(i);
333 assert(addr != NULL, "invariant");
334 assert(addr >= fr.sp(), "must be inside the frame");
335
336 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr);
337 assert(sv != NULL, "sanity check");
338
339 result->add(sv);
340 }
341 }
342
343 static void stack_expressions(StackValueCollection* result,
344 int length,
345 int max_locals,
346 const InterpreterOopMap& oop_mask,
347 const frame& fr) {
348
349 assert(result != NULL, "invariant");
350
351 for (int i = 0; i < length; ++i) {
352 const intptr_t* addr = fr.interpreter_frame_expression_stack_at(i);
353 assert(addr != NULL, "invariant");
354 if (!is_in_expression_stack(fr, addr)) {
355 // Need to ensure no bogus escapes.
356 addr = NULL;
357 }
358
359 StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
360 i + max_locals,
361 addr);
362 assert(sv != NULL, "sanity check");
363
364 result->add(sv);
365 }
366 }
367
368 StackValueCollection* interpretedVFrame::locals() const {
369 return stack_data(false);
370 }
371
372 StackValueCollection* interpretedVFrame::expressions() const {
373 return stack_data(true);
374 }
375
376 /*
377 * Worker routine for fetching references and/or values
378 * for a particular bci in the interpretedVFrame.
379 *
380 * Returns data for either "locals" or "expressions",
381 * using bci relative oop_map (oop_mask) information.
382 *
383 * @param expressions bool switch controlling what data to return
384 (false == locals / true == expression)
385 *
386 */
387 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
388
389 InterpreterOopMap oop_mask;
390 method()->mask_for(bci(), &oop_mask);
391 const int mask_len = oop_mask.number_of_entries();
392
393 // If the method is native, method()->max_locals() is not telling the truth.
394 // For our purposes, max locals instead equals the size of parameters.
395 const int max_locals = method()->is_native() ?
396 method()->size_of_parameters() : method()->max_locals();
397
398 assert(mask_len >= max_locals, "invariant");
399
400 const int length = expressions ? mask_len - max_locals : max_locals;
401 assert(length >= 0, "invariant");
402
403 StackValueCollection* const result = new StackValueCollection(length);
404
405 if (0 == length) {
406 return result;
407 }
408
409 if (expressions) {
410 stack_expressions(result, length, max_locals, oop_mask, fr());
411 } else {
412 stack_locals(result, length, oop_mask, fr());
413 }
414
415 assert(length == result->size(), "invariant");
416
417 return result;
418 }
419
420 void interpretedVFrame::set_locals(StackValueCollection* values) const {
421 if (values == NULL || values->size() == 0) return;
422
423 // If the method is native, max_locals is not telling the truth.
424 // maxlocals then equals the size of parameters
425 const int max_locals = method()->is_native() ?
426 method()->size_of_parameters() : method()->max_locals();
427
428 assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
429
430 // handle locals
431 for (int i = 0; i < max_locals; i++) {
432 // Find stack location
433 intptr_t *addr = locals_addr_at(i);
434
435 // Depending on oop/int put it in the right package
436 const StackValue* const sv = values->at(i);
437 assert(sv != NULL, "sanity check");
438 if (sv->type() == T_OBJECT) {
439 *(oop *) addr = (sv->get_obj())();
440 } else { // integer
441 *addr = sv->get_int();
442 }
443 }
444 }
445
446 // ------------- cChunk --------------
447
448 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
449 : externalVFrame(fr, reg_map, thread) {}
450
451 #ifdef ASSERT
452 void vframeStreamCommon::found_bad_method_frame() const {
453 // 6379830 Cut point for an assertion that occasionally fires when
454 // we are using the performance analyzer.
455 // Disable this assert when testing the analyzer with fastdebug.
456 // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
457 fatal("invalid bci or invalid scope desc");
458 }
459 #endif
460
461 // top-frame will be skipped
462 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
463 bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
464 _stop_at_java_call_stub = stop_at_java_call_stub;
465
466 // skip top frame, as it may not be at safepoint
467 _prev_frame = top_frame;
468 _frame = top_frame.sender(&_reg_map);
469 while (!fill_from_frame()) {
470 _prev_frame = _frame;
471 _frame = _frame.sender(&_reg_map);
472 }
473 }
474
475
476 // Step back n frames, skip any pseudo frames in between.
477 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
478 // AccessController.doPrivileged.
479 void vframeStreamCommon::security_get_caller_frame(int depth) {
480 assert(depth >= 0, "invalid depth: %d", depth);
481 for (int n = 0; !at_end(); security_next()) {
482 if (!method()->is_ignored_by_security_stack_walk()) {
483 if (n == depth) {
484 // We have reached the desired depth; return.
485 return;
486 }
487 n++; // this is a non-skipped frame; count it against the depth
488 }
489 }
490 // NOTE: At this point there were not enough frames on the stack
491 // to walk to depth. Callers of this method have to check for at_end.
492 }
493
494
495 void vframeStreamCommon::security_next() {
496 if (method()->is_prefixed_native()) {
497 skip_prefixed_method_and_wrappers(); // calls next()
498 } else {
499 next();
500 }
501 }
502
503
504 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
505 ResourceMark rm;
506 HandleMark hm;
507
508 int method_prefix_count = 0;
509 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
510 Klass* prefixed_klass = method()->method_holder();
511 const char* prefixed_name = method()->name()->as_C_string();
512 size_t prefixed_name_len = strlen(prefixed_name);
513 int prefix_index = method_prefix_count-1;
514
515 while (!at_end()) {
516 next();
517 if (method()->method_holder() != prefixed_klass) {
518 break; // classes don't match, can't be a wrapper
519 }
520 const char* name = method()->name()->as_C_string();
521 size_t name_len = strlen(name);
522 size_t prefix_len = prefixed_name_len - name_len;
523 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
524 break; // prefixed name isn't prefixed version of method name, can't be a wrapper
525 }
526 for (; prefix_index >= 0; --prefix_index) {
527 const char* possible_prefix = method_prefixes[prefix_index];
528 size_t possible_prefix_len = strlen(possible_prefix);
529 if (possible_prefix_len == prefix_len &&
530 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
531 break; // matching prefix found
532 }
533 }
534 if (prefix_index < 0) {
535 break; // didn't find the prefix, can't be a wrapper
536 }
537 prefixed_name = name;
538 prefixed_name_len = name_len;
539 }
540 }
541
542
543 void vframeStreamCommon::skip_reflection_related_frames() {
544 while (!at_end() &&
545 (method()->method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) ||
546 method()->method_holder()->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass()))) {
547 next();
548 }
549 }
550
551 javaVFrame* vframeStreamCommon::asJavaVFrame() {
552 javaVFrame* result = NULL;
553 if (_mode == compiled_mode) {
554 guarantee(_frame.is_compiled_frame(), "expected compiled Java frame");
555
556 // lazy update to register map
557 bool update_map = true;
558 RegisterMap map(_thread, update_map);
559 frame f = _prev_frame.sender(&map);
560
561 guarantee(f.is_compiled_frame(), "expected compiled Java frame");
562
563 compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&f, &map, _thread));
564
565 guarantee(cvf->cb() == cb(), "wrong code blob");
566
567 // get the same scope as this stream
568 cvf = cvf->at_scope(_decode_offset, _vframe_id);
569
570 guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope");
571 guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope");
572 guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe");
573
574 result = cvf;
575 } else {
576 result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
577 }
578 guarantee(result->method() == method(), "wrong method");
579 return result;
580 }
581
582
583 #ifndef PRODUCT
584 void vframe::print() {
585 if (WizardMode) _fr.print_value_on(tty,NULL);
586 }
587
588
589 void vframe::print_value() const {
590 ((vframe*)this)->print();
591 }
592
593
594 void entryVFrame::print_value() const {
595 ((entryVFrame*)this)->print();
596 }
597
598 void entryVFrame::print() {
599 vframe::print();
600 tty->print_cr("C Chunk inbetween Java");
601 tty->print_cr("C link " INTPTR_FORMAT, p2i(_fr.link()));
602 }
603
604
605 // ------------- javaVFrame --------------
606
607 static void print_stack_values(const char* title, StackValueCollection* values) {
608 if (values->is_empty()) return;
609 tty->print_cr("\t%s:", title);
610 values->print();
611 }
612
613
614 void javaVFrame::print() {
615 ResourceMark rm;
616 vframe::print();
617 tty->print("\t");
618 method()->print_value();
619 tty->cr();
620 tty->print_cr("\tbci: %d", bci());
621
622 print_stack_values("locals", locals());
623 print_stack_values("expressions", expressions());
624
625 GrowableArray<MonitorInfo*>* list = monitors();
626 if (list->is_empty()) return;
627 tty->print_cr("\tmonitor list:");
628 for (int index = (list->length()-1); index >= 0; index--) {
629 MonitorInfo* monitor = list->at(index);
630 tty->print("\t obj\t");
631 if (monitor->owner_is_scalar_replaced()) {
632 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
633 tty->print("( is scalar replaced %s)", k->external_name());
634 } else if (monitor->owner() == NULL) {
635 tty->print("( null )");
636 } else {
637 monitor->owner()->print_value();
638 tty->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
639 }
640 if (monitor->eliminated()) {
641 if(is_compiled_frame()) {
642 tty->print(" ( lock is eliminated in compiled frame )");
643 } else {
644 tty->print(" ( lock is eliminated, frame not compiled )");
645 }
646 }
647 tty->cr();
648 tty->print("\t ");
649 monitor->lock()->print_on(tty);
650 tty->cr();
651 }
652 }
653
654
655 void javaVFrame::print_value() const {
656 Method* m = method();
657 InstanceKlass* k = m->method_holder();
658 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
659 p2i(_fr.sp()), p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
660 tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
661
662 if (!m->is_native()) {
663 Symbol* source_name = k->source_file_name();
664 int line_number = m->line_number_from_bci(bci());
665 if (source_name != NULL && (line_number != -1)) {
666 tty->print("(%s:%d)", source_name->as_C_string(), line_number);
667 }
668 } else {
669 tty->print("(Native Method)");
670 }
671 // Check frame size and print warning if it looks suspiciously large
672 if (fr().sp() != NULL) {
673 RegisterMap map = *register_map();
674 uint size = fr().frame_size(&map);
675 #ifdef _LP64
676 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
677 #else
678 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
679 #endif
680 }
681 }
682
683
684 bool javaVFrame::structural_compare(javaVFrame* other) {
685 // Check static part
686 if (method() != other->method()) return false;
687 if (bci() != other->bci()) return false;
688
689 // Check locals
690 StackValueCollection *locs = locals();
691 StackValueCollection *other_locs = other->locals();
692 assert(locs->size() == other_locs->size(), "sanity check");
693 int i;
694 for(i = 0; i < locs->size(); i++) {
695 // it might happen the compiler reports a conflict and
696 // the interpreter reports a bogus int.
697 if ( is_compiled_frame() && locs->at(i)->type() == T_CONFLICT) continue;
698 if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
699
700 if (!locs->at(i)->equal(other_locs->at(i)))
701 return false;
702 }
703
704 // Check expressions
705 StackValueCollection* exprs = expressions();
706 StackValueCollection* other_exprs = other->expressions();
707 assert(exprs->size() == other_exprs->size(), "sanity check");
708 for(i = 0; i < exprs->size(); i++) {
709 if (!exprs->at(i)->equal(other_exprs->at(i)))
710 return false;
711 }
712
713 return true;
714 }
715
716
717 void javaVFrame::print_activation(int index) const {
718 // frame number and method
719 tty->print("%2d - ", index);
720 ((vframe*)this)->print_value();
721 tty->cr();
722
723 if (WizardMode) {
724 ((vframe*)this)->print();
725 tty->cr();
726 }
727 }
728
729
730 void javaVFrame::verify() const {
731 }
732
733
734 void interpretedVFrame::verify() const {
735 }
736
737
738 // ------------- externalVFrame --------------
739
740 void externalVFrame::print() {
741 _fr.print_value_on(tty,NULL);
742 }
743
744
745 void externalVFrame::print_value() const {
746 ((vframe*)this)->print();
747 }
748 #endif // PRODUCT