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comparison src/share/vm/runtime/vframe.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 # include "incls/_precompiled.incl"
26 # include "incls/_vframe.cpp.incl"
27
28 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
29 : _reg_map(reg_map), _thread(thread) {
30 assert(fr != NULL, "must have frame");
31 _fr = *fr;
32 }
33
34 vframe::vframe(const frame* fr, JavaThread* thread)
35 : _reg_map(thread), _thread(thread) {
36 assert(fr != NULL, "must have frame");
37 _fr = *fr;
38 }
39
40 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
41 // Interpreter frame
42 if (f->is_interpreted_frame()) {
43 return new interpretedVFrame(f, reg_map, thread);
44 }
45
46 // Compiled frame
47 CodeBlob* cb = f->cb();
48 if (cb != NULL) {
49 if (cb->is_nmethod()) {
50 nmethod* nm = (nmethod*)cb;
51 return new compiledVFrame(f, reg_map, thread, nm);
52 }
53
54 if (f->is_runtime_frame()) {
55 // Skip this frame and try again.
56 RegisterMap temp_map = *reg_map;
57 frame s = f->sender(&temp_map);
58 return new_vframe(&s, &temp_map, thread);
59 }
60 }
61
62 // External frame
63 return new externalVFrame(f, reg_map, thread);
64 }
65
66 vframe* vframe::sender() const {
67 RegisterMap temp_map = *register_map();
68 assert(is_top(), "just checking");
69 if (_fr.is_entry_frame() && _fr.is_first_frame()) return NULL;
70 frame s = _fr.real_sender(&temp_map);
71 if (s.is_first_frame()) return NULL;
72 return vframe::new_vframe(&s, &temp_map, thread());
73 }
74
75 vframe* vframe::top() const {
76 vframe* vf = (vframe*) this;
77 while (!vf->is_top()) vf = vf->sender();
78 return vf;
79 }
80
81
82 javaVFrame* vframe::java_sender() const {
83 vframe* f = sender();
84 while (f != NULL) {
85 if (f->is_java_frame()) return javaVFrame::cast(f);
86 f = f->sender();
87 }
88 return NULL;
89 }
90
91 // ------------- javaVFrame --------------
92
93 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
94 assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
95 "must be at safepoint or it's a java frame of the current thread");
96
97 GrowableArray<MonitorInfo*>* mons = monitors();
98 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
99 if (mons->is_empty()) return result;
100
101 bool found_first_monitor = false;
102 ObjectMonitor *pending_monitor = thread()->current_pending_monitor();
103 ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
104 oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : NULL);
105 oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : NULL);
106
107 for (int index = (mons->length()-1); index >= 0; index--) {
108 MonitorInfo* monitor = mons->at(index);
109 oop obj = monitor->owner();
110 if (obj == NULL) continue; // skip unowned monitor
111 //
112 // Skip the monitor that the thread is blocked to enter or waiting on
113 //
114 if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
115 continue;
116 }
117 found_first_monitor = true;
118 result->append(monitor);
119 }
120 return result;
121 }
122
123 static void print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
124 if (obj.not_null()) {
125 st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, (address)obj());
126 if (obj->klass() == SystemDictionary::class_klass()) {
127 klassOop target_klass = java_lang_Class::as_klassOop(obj());
128 st->print_cr("(a java.lang.Class for %s)", instanceKlass::cast(target_klass)->external_name());
129 } else {
130 Klass* k = Klass::cast(obj->klass());
131 st->print_cr("(a %s)", k->external_name());
132 }
133 }
134 }
135
136 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
137 ResourceMark rm;
138
139 // If this is the first frame, and java.lang.Object.wait(...) then print out the receiver.
140 if (frame_count == 0) {
141 if (method()->name() == vmSymbols::wait_name() &&
142 instanceKlass::cast(method()->method_holder())->name() == vmSymbols::java_lang_Object()) {
143 StackValueCollection* locs = locals();
144 if (!locs->is_empty()) {
145 StackValue* sv = locs->at(0);
146 if (sv->type() == T_OBJECT) {
147 Handle o = locs->at(0)->get_obj();
148 print_locked_object_class_name(st, o, "waiting on");
149 }
150 }
151 } else if (thread()->current_park_blocker() != NULL) {
152 oop obj = thread()->current_park_blocker();
153 Klass* k = Klass::cast(obj->klass());
154 st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", (address)obj, k->external_name());
155 }
156 }
157
158
159 // Print out all monitors that we have locked or are trying to lock
160 GrowableArray<MonitorInfo*>* mons = monitors();
161 if (!mons->is_empty()) {
162 bool found_first_monitor = false;
163 for (int index = (mons->length()-1); index >= 0; index--) {
164 MonitorInfo* monitor = mons->at(index);
165 if (monitor->owner() != NULL) {
166
167 // First, assume we have the monitor locked. If we haven't found an
168 // owned monitor before and this is the first frame, then we need to
169 // see if we have completed the lock or we are blocked trying to
170 // acquire it - we can only be blocked if the monitor is inflated
171
172 const char *lock_state = "locked"; // assume we have the monitor locked
173 if (!found_first_monitor && frame_count == 0) {
174 markOop mark = monitor->owner()->mark();
175 if (mark->has_monitor() &&
176 mark->monitor() == thread()->current_pending_monitor()) {
177 lock_state = "waiting to lock";
178 }
179 }
180
181 found_first_monitor = true;
182 print_locked_object_class_name(st, monitor->owner(), lock_state);
183 }
184 }
185 }
186 }
187
188 // ------------- interpretedVFrame --------------
189
190 u_char* interpretedVFrame::bcp() const {
191 return fr().interpreter_frame_bcp();
192 }
193
194 void interpretedVFrame::set_bcp(u_char* bcp) {
195 fr().interpreter_frame_set_bcp(bcp);
196 }
197
198 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
199 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
200 return fr().interpreter_frame_local_at(offset);
201 }
202
203
204 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
205 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
206 for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
207 current >= fr().interpreter_frame_monitor_end();
208 current = fr().previous_monitor_in_interpreter_frame(current)) {
209 result->push(new MonitorInfo(current->obj(), current->lock()));
210 }
211 return result;
212 }
213
214 int interpretedVFrame::bci() const {
215 return method()->bci_from(bcp());
216 }
217
218 methodOop interpretedVFrame::method() const {
219 return fr().interpreter_frame_method();
220 }
221
222 StackValueCollection* interpretedVFrame::locals() const {
223 int length = method()->max_locals();
224
225 if (method()->is_native()) {
226 // If the method is native, max_locals is not telling the truth.
227 // maxlocals then equals the size of parameters
228 length = method()->size_of_parameters();
229 }
230
231 StackValueCollection* result = new StackValueCollection(length);
232
233 // Get oopmap describing oops and int for current bci
234 if (TaggedStackInterpreter) {
235 for(int i=0; i < length; i++) {
236 // Find stack location
237 intptr_t *addr = locals_addr_at(i);
238
239 // Depending on oop/int put it in the right package
240 StackValue *sv;
241 frame::Tag tag = fr().interpreter_frame_local_tag(i);
242 if (tag == frame::TagReference) {
243 // oop value
244 Handle h(*(oop *)addr);
245 sv = new StackValue(h);
246 } else {
247 // integer
248 sv = new StackValue(*addr);
249 }
250 assert(sv != NULL, "sanity check");
251 result->add(sv);
252 }
253 } else {
254 InterpreterOopMap oop_mask;
255 if (TraceDeoptimization && Verbose) {
256 methodHandle m_h(thread(), method());
257 OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask);
258 } else {
259 method()->mask_for(bci(), &oop_mask);
260 }
261 // handle locals
262 for(int i=0; i < length; i++) {
263 // Find stack location
264 intptr_t *addr = locals_addr_at(i);
265
266 // Depending on oop/int put it in the right package
267 StackValue *sv;
268 if (oop_mask.is_oop(i)) {
269 // oop value
270 Handle h(*(oop *)addr);
271 sv = new StackValue(h);
272 } else {
273 // integer
274 sv = new StackValue(*addr);
275 }
276 assert(sv != NULL, "sanity check");
277 result->add(sv);
278 }
279 }
280 return result;
281 }
282
283 void interpretedVFrame::set_locals(StackValueCollection* values) const {
284 if (values == NULL || values->size() == 0) return;
285
286 int length = method()->max_locals();
287 if (method()->is_native()) {
288 // If the method is native, max_locals is not telling the truth.
289 // maxlocals then equals the size of parameters
290 length = method()->size_of_parameters();
291 }
292
293 assert(length == values->size(), "Mismatch between actual stack format and supplied data");
294
295 // handle locals
296 for (int i = 0; i < length; i++) {
297 // Find stack location
298 intptr_t *addr = locals_addr_at(i);
299
300 // Depending on oop/int put it in the right package
301 StackValue *sv = values->at(i);
302 assert(sv != NULL, "sanity check");
303 if (sv->type() == T_OBJECT) {
304 *(oop *) addr = (sv->get_obj())();
305 } else { // integer
306 *addr = sv->get_int();
307 }
308 }
309 }
310
311 StackValueCollection* interpretedVFrame::expressions() const {
312 int length = fr().interpreter_frame_expression_stack_size();
313 if (method()->is_native()) {
314 // If the method is native, there is no expression stack
315 length = 0;
316 }
317
318 int nof_locals = method()->max_locals();
319 StackValueCollection* result = new StackValueCollection(length);
320
321 if (TaggedStackInterpreter) {
322 // handle expressions
323 for(int i=0; i < length; i++) {
324 // Find stack location
325 intptr_t *addr = fr().interpreter_frame_expression_stack_at(i);
326 frame::Tag tag = fr().interpreter_frame_expression_stack_tag(i);
327
328 // Depending on oop/int put it in the right package
329 StackValue *sv;
330 if (tag == frame::TagReference) {
331 // oop value
332 Handle h(*(oop *)addr);
333 sv = new StackValue(h);
334 } else {
335 // otherwise
336 sv = new StackValue(*addr);
337 }
338 assert(sv != NULL, "sanity check");
339 result->add(sv);
340 }
341 } else {
342 InterpreterOopMap oop_mask;
343 // Get oopmap describing oops and int for current bci
344 if (TraceDeoptimization && Verbose) {
345 methodHandle m_h(method());
346 OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask);
347 } else {
348 method()->mask_for(bci(), &oop_mask);
349 }
350 // handle expressions
351 for(int i=0; i < length; i++) {
352 // Find stack location
353 intptr_t *addr = fr().interpreter_frame_expression_stack_at(i);
354
355 // Depending on oop/int put it in the right package
356 StackValue *sv;
357 if (oop_mask.is_oop(i + nof_locals)) {
358 // oop value
359 Handle h(*(oop *)addr);
360 sv = new StackValue(h);
361 } else {
362 // integer
363 sv = new StackValue(*addr);
364 }
365 assert(sv != NULL, "sanity check");
366 result->add(sv);
367 }
368 }
369 return result;
370 }
371
372
373 // ------------- cChunk --------------
374
375 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
376 : externalVFrame(fr, reg_map, thread) {}
377
378
379 void vframeStreamCommon::found_bad_method_frame() {
380 // 6379830 Cut point for an assertion that occasionally fires when
381 // we are using the performance analyzer.
382 // Disable this assert when testing the analyzer with fastdebug.
383 // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
384 assert(false, "invalid bci or invalid scope desc");
385 }
386
387 // top-frame will be skipped
388 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
389 bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
390 _stop_at_java_call_stub = stop_at_java_call_stub;
391
392 // skip top frame, as it may not be at safepoint
393 _frame = top_frame.sender(&_reg_map);
394 while (!fill_from_frame()) {
395 _frame = _frame.sender(&_reg_map);
396 }
397 }
398
399
400 // Step back n frames, skip any pseudo frames in between.
401 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
402 // AccessController.doPrivileged.
403 //
404 // NOTE that in JDK 1.4 this has been exposed to Java as
405 // sun.reflect.Reflection.getCallerClass(), which can be inlined.
406 // Inlined versions must match this routine's logic.
407 // Native method prefixing logic does not need to match since
408 // the method names don't match and inlining will not occur.
409 // See, for example,
410 // Parse::inline_native_Reflection_getCallerClass in
411 // opto/library_call.cpp.
412 void vframeStreamCommon::security_get_caller_frame(int depth) {
413 bool use_new_reflection = JDK_Version::is_gte_jdk14x_version() && UseNewReflection;
414
415 while (!at_end()) {
416 if (Universe::reflect_invoke_cache()->is_same_method(method())) {
417 // This is Method.invoke() -- skip it
418 } else if (use_new_reflection &&
419 Klass::cast(method()->method_holder())
420 ->is_subclass_of(SystemDictionary::reflect_method_accessor_klass())) {
421 // This is an auxilary frame -- skip it
422 } else {
423 // This is non-excluded frame, we need to count it against the depth
424 if (depth-- <= 0) {
425 // we have reached the desired depth, we are done
426 break;
427 }
428 }
429 if (method()->is_prefixed_native()) {
430 skip_prefixed_method_and_wrappers();
431 } else {
432 next();
433 }
434 }
435 }
436
437
438 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
439 ResourceMark rm;
440 HandleMark hm;
441
442 int method_prefix_count = 0;
443 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
444 KlassHandle prefixed_klass(method()->method_holder());
445 const char* prefixed_name = method()->name()->as_C_string();
446 size_t prefixed_name_len = strlen(prefixed_name);
447 int prefix_index = method_prefix_count-1;
448
449 while (!at_end()) {
450 next();
451 if (method()->method_holder() != prefixed_klass()) {
452 break; // classes don't match, can't be a wrapper
453 }
454 const char* name = method()->name()->as_C_string();
455 size_t name_len = strlen(name);
456 size_t prefix_len = prefixed_name_len - name_len;
457 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
458 break; // prefixed name isn't prefixed version of method name, can't be a wrapper
459 }
460 for (; prefix_index >= 0; --prefix_index) {
461 const char* possible_prefix = method_prefixes[prefix_index];
462 size_t possible_prefix_len = strlen(possible_prefix);
463 if (possible_prefix_len == prefix_len &&
464 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
465 break; // matching prefix found
466 }
467 }
468 if (prefix_index < 0) {
469 break; // didn't find the prefix, can't be a wrapper
470 }
471 prefixed_name = name;
472 prefixed_name_len = name_len;
473 }
474 }
475
476
477 void vframeStreamCommon::skip_reflection_related_frames() {
478 while (!at_end() &&
479 (JDK_Version::is_gte_jdk14x_version() && UseNewReflection &&
480 (Klass::cast(method()->method_holder())->is_subclass_of(SystemDictionary::reflect_method_accessor_klass()) ||
481 Klass::cast(method()->method_holder())->is_subclass_of(SystemDictionary::reflect_constructor_accessor_klass())))) {
482 next();
483 }
484 }
485
486
487 #ifndef PRODUCT
488 void vframe::print() {
489 if (WizardMode) _fr.print_value_on(tty,NULL);
490 }
491
492
493 void vframe::print_value() const {
494 ((vframe*)this)->print();
495 }
496
497
498 void entryVFrame::print_value() const {
499 ((entryVFrame*)this)->print();
500 }
501
502 void entryVFrame::print() {
503 vframe::print();
504 tty->print_cr("C Chunk inbetween Java");
505 tty->print_cr("C link " INTPTR_FORMAT, _fr.link());
506 }
507
508
509 // ------------- javaVFrame --------------
510
511 static void print_stack_values(const char* title, StackValueCollection* values) {
512 if (values->is_empty()) return;
513 tty->print_cr("\t%s:", title);
514 values->print();
515 }
516
517
518 void javaVFrame::print() {
519 ResourceMark rm;
520 vframe::print();
521 tty->print("\t");
522 method()->print_value();
523 tty->cr();
524 tty->print_cr("\tbci: %d", bci());
525
526 print_stack_values("locals", locals());
527 print_stack_values("expressions", expressions());
528
529 GrowableArray<MonitorInfo*>* list = monitors();
530 if (list->is_empty()) return;
531 tty->print_cr("\tmonitor list:");
532 for (int index = (list->length()-1); index >= 0; index--) {
533 MonitorInfo* monitor = list->at(index);
534 tty->print("\t obj\t"); monitor->owner()->print_value();
535 tty->print("(" INTPTR_FORMAT ")", (address)monitor->owner());
536 tty->cr();
537 tty->print("\t ");
538 monitor->lock()->print_on(tty);
539 tty->cr();
540 }
541 }
542
543
544 void javaVFrame::print_value() const {
545 methodOop m = method();
546 klassOop k = m->method_holder();
547 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
548 _fr.sp(), _fr.unextended_sp(), _fr.fp(), _fr.pc());
549 tty->print("%s.%s", Klass::cast(k)->internal_name(), m->name()->as_C_string());
550
551 if (!m->is_native()) {
552 symbolOop source_name = instanceKlass::cast(k)->source_file_name();
553 int line_number = m->line_number_from_bci(bci());
554 if (source_name != NULL && (line_number != -1)) {
555 tty->print("(%s:%d)", source_name->as_C_string(), line_number);
556 }
557 } else {
558 tty->print("(Native Method)");
559 }
560 // Check frame size and print warning if it looks suspiciously large
561 if (fr().sp() != NULL) {
562 uint size = fr().frame_size();
563 #ifdef _LP64
564 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
565 #else
566 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
567 #endif
568 }
569 }
570
571
572 bool javaVFrame::structural_compare(javaVFrame* other) {
573 // Check static part
574 if (method() != other->method()) return false;
575 if (bci() != other->bci()) return false;
576
577 // Check locals
578 StackValueCollection *locs = locals();
579 StackValueCollection *other_locs = other->locals();
580 assert(locs->size() == other_locs->size(), "sanity check");
581 int i;
582 for(i = 0; i < locs->size(); i++) {
583 // it might happen the compiler reports a conflict and
584 // the interpreter reports a bogus int.
585 if ( is_compiled_frame() && locs->at(i)->type() == T_CONFLICT) continue;
586 if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
587
588 if (!locs->at(i)->equal(other_locs->at(i)))
589 return false;
590 }
591
592 // Check expressions
593 StackValueCollection* exprs = expressions();
594 StackValueCollection* other_exprs = other->expressions();
595 assert(exprs->size() == other_exprs->size(), "sanity check");
596 for(i = 0; i < exprs->size(); i++) {
597 if (!exprs->at(i)->equal(other_exprs->at(i)))
598 return false;
599 }
600
601 return true;
602 }
603
604
605 void javaVFrame::print_activation(int index) const {
606 // frame number and method
607 tty->print("%2d - ", index);
608 ((vframe*)this)->print_value();
609 tty->cr();
610
611 if (WizardMode) {
612 ((vframe*)this)->print();
613 tty->cr();
614 }
615 }
616
617
618 void javaVFrame::verify() const {
619 }
620
621
622 void interpretedVFrame::verify() const {
623 }
624
625
626 // ------------- externalVFrame --------------
627
628 void externalVFrame::print() {
629 _fr.print_value_on(tty,NULL);
630 }
631
632
633 void externalVFrame::print_value() const {
634 ((vframe*)this)->print();
635 }
636 #endif // PRODUCT