1 /*
2 * Copyright (c) 1997, 2024, 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/javaThreadStatus.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/debugInfoRec.hpp"
32 #include "code/nmethod.hpp"
33 #include "code/pcDesc.hpp"
34 #include "code/scopeDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/oopMapCache.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/method.inline.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "oops/stackChunkOop.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "runtime/frame.inline.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/javaThread.inline.hpp"
47 #include "runtime/objectMonitor.hpp"
48 #include "runtime/objectMonitor.inline.hpp"
49 #include "runtime/osThread.hpp"
50 #include "runtime/signature.hpp"
51 #include "runtime/stackFrameStream.inline.hpp"
52 #include "runtime/stubRoutines.hpp"
53 #include "runtime/synchronizer.inline.hpp"
54 #include "runtime/vframe.inline.hpp"
55 #include "runtime/vframeArray.hpp"
56 #include "runtime/vframe_hp.hpp"
57
58 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
59 : _reg_map(reg_map), _thread(thread),
60 _chunk(Thread::current(), reg_map->stack_chunk()()) {
61 assert(fr != nullptr, "must have frame");
62 _fr = *fr;
63 }
64
65 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
66 // Interpreter frame
67 if (f->is_interpreted_frame()) {
68 return new interpretedVFrame(f, reg_map, thread);
69 }
70
71 // Compiled frame
72 CodeBlob* cb = f->cb();
73 if (cb != nullptr) {
74 if (cb->is_nmethod()) {
75 nmethod* nm = cb->as_nmethod();
76 return new compiledVFrame(f, reg_map, thread, nm);
77 }
78
79 if (f->is_runtime_frame()) {
80 // Skip this frame and try again.
81 RegisterMap temp_map = *reg_map;
82 frame s = f->sender(&temp_map);
83 return new_vframe(&s, &temp_map, thread);
84 }
85 }
86
87 // Entry frame
88 if (f->is_entry_frame()) {
89 return new entryVFrame(f, reg_map, thread);
90 }
91
92 // External frame
93 return new externalVFrame(f, reg_map, thread);
94 }
95
96 vframe* vframe::sender() const {
97 RegisterMap temp_map = *register_map();
98 assert(is_top(), "just checking");
99 if (_fr.is_empty()) return nullptr;
100 if (_fr.is_entry_frame() && _fr.is_first_frame()) return nullptr;
101 frame s = _fr.real_sender(&temp_map);
102 if (s.is_first_frame()) return nullptr;
103 return vframe::new_vframe(&s, &temp_map, thread());
104 }
105
106 bool vframe::is_vthread_entry() const {
107 return _fr.is_first_vthread_frame(register_map()->thread());
108 }
109
110 javaVFrame* vframe::java_sender() const {
111 vframe* f = sender();
112 while (f != nullptr) {
113 if (f->is_vthread_entry()) break;
114 if (f->is_java_frame() && !javaVFrame::cast(f)->method()->is_continuation_enter_intrinsic())
115 return javaVFrame::cast(f);
116 f = f->sender();
117 }
118 return nullptr;
119 }
120
121 // ------------- javaVFrame --------------
122
123 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
124 assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
125 "must be at safepoint or it's a java frame of the current thread");
126
127 GrowableArray<MonitorInfo*>* mons = monitors();
128 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
129 if (mons->is_empty()) return result;
130
131 bool found_first_monitor = false;
132 // The ObjectMonitor* can't be async deflated since we are either
133 // at a safepoint or the calling thread is operating on itself so
134 // it cannot exit the ObjectMonitor so it remains busy.
135 ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
136 ObjectMonitor *pending_monitor = nullptr;
137 if (waiting_monitor == nullptr) {
138 pending_monitor = thread()->current_pending_monitor();
139 }
140 oop pending_obj = (pending_monitor != nullptr ? pending_monitor->object() : (oop) nullptr);
141 oop waiting_obj = (waiting_monitor != nullptr ? waiting_monitor->object() : (oop) nullptr);
142
143 for (int index = (mons->length()-1); index >= 0; index--) {
144 MonitorInfo* monitor = mons->at(index);
145 if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
146 oop obj = monitor->owner();
147 if (obj == nullptr) continue; // skip unowned monitor
148 //
149 // Skip the monitor that the thread is blocked to enter or waiting on
150 //
151 if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
152 continue;
153 }
154 found_first_monitor = true;
155 result->append(monitor);
156 }
157 return result;
158 }
159
160 void javaVFrame::print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
161 if (obj.not_null()) {
162 st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, p2i(obj()));
163 if (obj->klass() == vmClasses::Class_klass()) {
164 st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
165 } else {
166 Klass* k = obj->klass();
167 st->print_cr("(a %s)", k->external_name());
168 }
169 }
170 }
171
172 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
173 Thread* current = Thread::current();
174 ResourceMark rm(current);
175 HandleMark hm(current);
176
177 // If this is the first frame and it is java.lang.Object.wait(...)
178 // then print out the receiver. Locals are not always available,
179 // e.g., compiled native frames have no scope so there are no locals.
180 if (frame_count == 0) {
181 if (method()->name() == vmSymbols::wait_name() &&
182 method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
183 const char *wait_state = "waiting on"; // assume we are waiting
184 // If earlier in the output we reported java.lang.Thread.State ==
185 // "WAITING (on object monitor)" and now we report "waiting on", then
186 // we are still waiting for notification or timeout. Otherwise if
187 // we earlier reported java.lang.Thread.State == "BLOCKED (on object
188 // monitor)", then we are actually waiting to re-lock the monitor.
189 StackValueCollection* locs = locals();
190 if (!locs->is_empty()) {
191 StackValue* sv = locs->at(0);
192 if (sv->type() == T_OBJECT) {
193 Handle o = locs->at(0)->get_obj();
194 if (java_lang_Thread::get_thread_status(thread()->threadObj()) ==
195 JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER) {
196 wait_state = "waiting to re-lock in wait()";
197 }
198 print_locked_object_class_name(st, o, wait_state);
199 }
200 } else {
201 st->print_cr("\t- %s <no object reference available>", wait_state);
202 }
203 } else if (thread()->current_park_blocker() != nullptr) {
204 oop obj = thread()->current_park_blocker();
205 Klass* k = obj->klass();
206 st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", p2i(obj), k->external_name());
207 }
208 else if (thread()->osthread()->get_state() == CONDVAR_WAIT) {
209 // We are waiting on the native class initialization monitor.
210 InstanceKlass* k = thread()->class_to_be_initialized();
211 if (k != nullptr) {
212 st->print_cr("\t- waiting on the Class initialization monitor for %s", k->external_name());
213 }
214 }
215 }
216
217 // Print out all monitors that we have locked, or are trying to lock,
218 // including re-locking after being notified or timing out in a wait().
219 GrowableArray<MonitorInfo*>* mons = monitors();
220 if (!mons->is_empty()) {
221 bool found_first_monitor = false;
222 for (int index = (mons->length()-1); index >= 0; index--) {
223 MonitorInfo* monitor = mons->at(index);
224 if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
225 if (monitor->owner_is_scalar_replaced()) {
226 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
227 st->print_cr("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
228 } else {
229 Handle obj(current, monitor->owner());
230 if (obj() != nullptr) {
231 print_locked_object_class_name(st, obj, "eliminated");
232 }
233 }
234 continue;
235 }
236 if (monitor->owner() != nullptr) {
237 // the monitor is associated with an object, i.e., it is locked
238
239 const char *lock_state = "locked"; // assume we have the monitor locked
240 if (!found_first_monitor && frame_count == 0) {
241 // If this is the first frame and we haven't found an owned
242 // monitor before, then we need to see if we have completed
243 // the lock or if we are blocked trying to acquire it. Only
244 // an inflated monitor that is first on the monitor list in
245 // the first frame can block us on a monitor enter.
246 markWord mark = monitor->owner()->mark();
247 // The first stage of async deflation does not affect any field
248 // used by this comparison so the ObjectMonitor* is usable here.
249 if (mark.has_monitor()) {
250 ObjectMonitor* mon = ObjectSynchronizer::read_monitor(current, monitor->owner(), mark);
251 if (// if the monitor is null we must be in the process of locking
252 mon == nullptr ||
253 // we have marked ourself as pending on this monitor
254 mon == thread()->current_pending_monitor() ||
255 // we are not the owner of this monitor
256 !mon->is_entered(thread())) {
257 lock_state = "waiting to lock";
258 }
259 }
260 }
261 print_locked_object_class_name(st, Handle(current, monitor->owner()), lock_state);
262
263 found_first_monitor = true;
264 }
265 }
266 }
267 }
268
269 // ------------- interpretedVFrame --------------
270
271 u_char* interpretedVFrame::bcp() const {
272 return stack_chunk() == nullptr ? fr().interpreter_frame_bcp() : stack_chunk()->interpreter_frame_bcp(fr());
273 }
274
275 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
276 assert(stack_chunk() == nullptr, "Not supported for heap frames"); // unsupported for now because seems to be unused
277 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
278 return fr().interpreter_frame_local_at(offset);
279 }
280
281 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
282 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
283 if (stack_chunk() == nullptr) { // no monitors in continuations
284 for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
285 current >= fr().interpreter_frame_monitor_end();
286 current = fr().previous_monitor_in_interpreter_frame(current)) {
287 result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
288 }
289 }
290 return result;
291 }
292
293 int interpretedVFrame::bci() const {
294 return method()->bci_from(bcp());
295 }
296
297 Method* interpretedVFrame::method() const {
298 return stack_chunk() == nullptr ? fr().interpreter_frame_method() : stack_chunk()->interpreter_frame_method(fr());
299 }
300
301 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
302 int index,
303 const intptr_t* const addr,
304 stackChunkOop chunk) {
305
306 assert(index >= 0 && index < oop_mask.number_of_entries(), "invariant");
307
308 // categorize using oop_mask
309 if (oop_mask.is_oop(index)) {
310 return StackValue::create_stack_value_from_oop_location(chunk, (void*)addr);
311 }
312 // value (integer) "v"
313 return new StackValue(addr != nullptr ? *addr : 0);
314 }
315
316 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
317 assert(addr != nullptr, "invariant");
318
319 // Ensure to be 'inside' the expression stack (i.e., addr >= sp for Intel).
320 // In case of exceptions, the expression stack is invalid and the sp
321 // will be reset to express this condition.
322 if (frame::interpreter_frame_expression_stack_direction() > 0) {
323 return addr <= fr.interpreter_frame_tos_address();
324 }
325
326 return addr >= fr.interpreter_frame_tos_address();
327 }
328
329 static void stack_locals(StackValueCollection* result,
330 int length,
331 const InterpreterOopMap& oop_mask,
332 const frame& fr,
333 const stackChunkOop chunk) {
334
335 assert(result != nullptr, "invariant");
336
337 for (int i = 0; i < length; ++i) {
338 const intptr_t* addr;
339 if (chunk == nullptr) {
340 addr = fr.interpreter_frame_local_at(i);
341 assert(addr >= fr.sp(), "must be inside the frame");
342 } else {
343 addr = chunk->interpreter_frame_local_at(fr, i);
344 }
345 assert(addr != nullptr, "invariant");
346
347 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr, chunk);
348 assert(sv != nullptr, "sanity check");
349
350 result->add(sv);
351 }
352 }
353
354 static void stack_expressions(StackValueCollection* result,
355 int length,
356 int max_locals,
357 const InterpreterOopMap& oop_mask,
358 const frame& fr,
359 const stackChunkOop chunk) {
360
361 assert(result != nullptr, "invariant");
362
363 for (int i = 0; i < length; ++i) {
364 const intptr_t* addr;
365 if (chunk == nullptr) {
366 addr = fr.interpreter_frame_expression_stack_at(i);
367 assert(addr != nullptr, "invariant");
368 if (!is_in_expression_stack(fr, addr)) {
369 // Need to ensure no bogus escapes.
370 addr = nullptr;
371 }
372 } else {
373 addr = chunk->interpreter_frame_expression_stack_at(fr, i);
374 }
375
376 StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
377 i + max_locals,
378 addr,
379 chunk);
380 assert(sv != nullptr, "sanity check");
381
382 result->add(sv);
383 }
384 }
385
386 StackValueCollection* interpretedVFrame::locals() const {
387 return stack_data(false);
388 }
389
390 StackValueCollection* interpretedVFrame::expressions() const {
391 return stack_data(true);
392 }
393
394 /*
395 * Worker routine for fetching references and/or values
396 * for a particular bci in the interpretedVFrame.
397 *
398 * Returns data for either "locals" or "expressions",
399 * using bci relative oop_map (oop_mask) information.
400 *
401 * @param expressions bool switch controlling what data to return
402 (false == locals / true == expression)
403 *
404 */
405 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
406
407 InterpreterOopMap oop_mask;
408 method()->mask_for(bci(), &oop_mask);
409 const int mask_len = oop_mask.number_of_entries();
410
411 // If the method is native, method()->max_locals() is not telling the truth.
412 // For our purposes, max locals instead equals the size of parameters.
413 const int max_locals = method()->is_native() ?
414 method()->size_of_parameters() : method()->max_locals();
415
416 assert(mask_len >= max_locals, "invariant");
417
418 const int length = expressions ? mask_len - max_locals : max_locals;
419 assert(length >= 0, "invariant");
420
421 StackValueCollection* const result = new StackValueCollection(length);
422
423 if (0 == length) {
424 return result;
425 }
426
427 if (expressions) {
428 stack_expressions(result, length, max_locals, oop_mask, fr(), stack_chunk());
429 } else {
430 stack_locals(result, length, oop_mask, fr(), stack_chunk());
431 }
432
433 assert(length == result->size(), "invariant");
434
435 return result;
436 }
437
438 void interpretedVFrame::set_locals(StackValueCollection* values) const {
439 if (values == nullptr || values->size() == 0) return;
440
441 // If the method is native, max_locals is not telling the truth.
442 // maxlocals then equals the size of parameters
443 const int max_locals = method()->is_native() ?
444 method()->size_of_parameters() : method()->max_locals();
445
446 assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
447
448 // handle locals
449 for (int i = 0; i < max_locals; i++) {
450 // Find stack location
451 intptr_t *addr = locals_addr_at(i);
452
453 // Depending on oop/int put it in the right package
454 const StackValue* const sv = values->at(i);
455 assert(sv != nullptr, "sanity check");
456 if (sv->type() == T_OBJECT) {
457 *(oop *) addr = (sv->get_obj())();
458 } else { // integer
459 *addr = sv->get_intptr();
460 }
461 }
462 }
463
464 // ------------- cChunk --------------
465
466 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
467 : externalVFrame(fr, reg_map, thread) {}
468
469 MonitorInfo::MonitorInfo(oop owner, BasicLock* lock, bool eliminated, bool owner_is_scalar_replaced) {
470 Thread* thread = Thread::current();
471 if (!owner_is_scalar_replaced) {
472 _owner = Handle(thread, owner);
473 _owner_klass = Handle();
474 } else {
475 assert(eliminated, "monitor should be eliminated for scalar replaced object");
476 _owner = Handle();
477 _owner_klass = Handle(thread, owner);
478 }
479 _lock = lock;
480 _eliminated = eliminated;
481 _owner_is_scalar_replaced = owner_is_scalar_replaced;
482 }
483
484 #ifdef ASSERT
485 void vframeStreamCommon::found_bad_method_frame() const {
486 // 6379830 Cut point for an assertion that occasionally fires when
487 // we are using the performance analyzer.
488 // Disable this when testing the analyzer with fastdebug.
489 fatal("invalid bci or invalid scope desc");
490 }
491 #endif
492
493 vframeStream::vframeStream(JavaThread* thread, Handle continuation_scope, bool stop_at_java_call_stub)
494 : vframeStreamCommon(RegisterMap(thread,
495 RegisterMap::UpdateMap::include,
496 RegisterMap::ProcessFrames::include,
497 RegisterMap::WalkContinuation::include)) {
498
499 _stop_at_java_call_stub = stop_at_java_call_stub;
500 _continuation_scope = continuation_scope;
501
502 if (!thread->has_last_Java_frame()) {
503 _mode = at_end_mode;
504 return;
505 }
506
507 _frame = _thread->last_frame();
508 _cont_entry = _thread->last_continuation();
509 while (!fill_from_frame()) {
510 _frame = _frame.sender(&_reg_map);
511 }
512 }
513
514 vframeStream::vframeStream(oop continuation, Handle continuation_scope)
515 : vframeStreamCommon(RegisterMap(continuation, RegisterMap::UpdateMap::include)) {
516
517 _stop_at_java_call_stub = false;
518 _continuation_scope = continuation_scope;
519
520 if (!Continuation::has_last_Java_frame(continuation, &_frame, &_reg_map)) {
521 _mode = at_end_mode;
522 return;
523 }
524
525 // _chunk = _reg_map.stack_chunk();
526 while (!fill_from_frame()) {
527 _frame = _frame.sender(&_reg_map);
528 }
529 }
530
531
532 // Step back n frames, skip any pseudo frames in between.
533 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
534 // AccessController.doPrivileged.
535 void vframeStreamCommon::security_get_caller_frame(int depth) {
536 assert(depth >= 0, "invalid depth: %d", depth);
537 for (int n = 0; !at_end(); security_next()) {
538 if (!method()->is_ignored_by_security_stack_walk()) {
539 if (n == depth) {
540 // We have reached the desired depth; return.
541 return;
542 }
543 n++; // this is a non-skipped frame; count it against the depth
544 }
545 }
546 // NOTE: At this point there were not enough frames on the stack
547 // to walk to depth. Callers of this method have to check for at_end.
548 }
549
550
551 void vframeStreamCommon::security_next() {
552 if (method()->is_prefixed_native()) {
553 skip_prefixed_method_and_wrappers(); // calls next()
554 } else {
555 next();
556 }
557 }
558
559
560 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
561 ResourceMark rm;
562
563 int method_prefix_count = 0;
564 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
565 Klass* prefixed_klass = method()->method_holder();
566 const char* prefixed_name = method()->name()->as_C_string();
567 size_t prefixed_name_len = strlen(prefixed_name);
568 int prefix_index = method_prefix_count-1;
569
570 while (!at_end()) {
571 next();
572 if (method()->method_holder() != prefixed_klass) {
573 break; // classes don't match, can't be a wrapper
574 }
575 const char* name = method()->name()->as_C_string();
576 size_t name_len = strlen(name);
577 size_t prefix_len = prefixed_name_len - name_len;
578 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
579 break; // prefixed name isn't prefixed version of method name, can't be a wrapper
580 }
581 for (; prefix_index >= 0; --prefix_index) {
582 const char* possible_prefix = method_prefixes[prefix_index];
583 size_t possible_prefix_len = strlen(possible_prefix);
584 if (possible_prefix_len == prefix_len &&
585 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
586 break; // matching prefix found
587 }
588 }
589 if (prefix_index < 0) {
590 break; // didn't find the prefix, can't be a wrapper
591 }
592 prefixed_name = name;
593 prefixed_name_len = name_len;
594 }
595 }
596
597 javaVFrame* vframeStreamCommon::asJavaVFrame() {
598 javaVFrame* result = nullptr;
599 // FIXME, need to re-do JDK-8271140 and check is_native_frame?
600 if (_mode == compiled_mode && _frame.is_compiled_frame()) {
601 assert(_frame.is_compiled_frame() || _frame.is_native_frame(), "expected compiled Java frame");
602 guarantee(_reg_map.update_map(), "");
603
604 compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
605
606 guarantee(cvf->cb() == cb(), "wrong code blob");
607
608 cvf = cvf->at_scope(_decode_offset, _vframe_id); // get the same scope as this stream
609
610 guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope");
611 guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope");
612 guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe");
613
614 result = cvf;
615 } else {
616 result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
617 }
618 assert(result->method() == method(), "wrong method");
619 return result;
620 }
621
622 #ifndef PRODUCT
623 void vframe::print() {
624 if (WizardMode) _fr.print_value_on(tty,nullptr);
625 }
626
627 void vframe::print_value() const {
628 ((vframe*)this)->print();
629 }
630
631
632 void entryVFrame::print_value() const {
633 ((entryVFrame*)this)->print();
634 }
635
636 void entryVFrame::print() {
637 vframe::print();
638 tty->print_cr("C Chunk in between Java");
639 tty->print_cr("C link " INTPTR_FORMAT, p2i(_fr.link()));
640 }
641
642
643 // ------------- javaVFrame --------------
644
645 static void print_stack_values(const char* title, StackValueCollection* values) {
646 if (values->is_empty()) return;
647 tty->print_cr("\t%s:", title);
648 values->print();
649 }
650
651
652 void javaVFrame::print() {
653 Thread* current_thread = Thread::current();
654 ResourceMark rm(current_thread);
655 HandleMark hm(current_thread);
656
657 vframe::print();
658 tty->print("\t");
659 method()->print_value();
660 tty->cr();
661 tty->print_cr("\tbci: %d", bci());
662
663 print_stack_values("locals", locals());
664 print_stack_values("expressions", expressions());
665
666 GrowableArray<MonitorInfo*>* list = monitors();
667 if (list->is_empty()) return;
668 tty->print_cr("\tmonitor list:");
669 for (int index = (list->length()-1); index >= 0; index--) {
670 MonitorInfo* monitor = list->at(index);
671 tty->print("\t obj\t");
672 if (monitor->owner_is_scalar_replaced()) {
673 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
674 tty->print("( is scalar replaced %s)", k->external_name());
675 } else if (monitor->owner() == nullptr) {
676 tty->print("( null )");
677 } else {
678 monitor->owner()->print_value();
679 tty->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
680 }
681 if (monitor->eliminated()) {
682 if(is_compiled_frame()) {
683 tty->print(" ( lock is eliminated in compiled frame )");
684 } else {
685 tty->print(" ( lock is eliminated, frame not compiled )");
686 }
687 }
688 tty->cr();
689 tty->print("\t ");
690 monitor->lock()->print_on(tty, monitor->owner());
691 tty->cr();
692 }
693 }
694
695
696 void javaVFrame::print_value() const {
697 Method* m = method();
698 InstanceKlass* k = m->method_holder();
699 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
700 p2i(_fr.sp()), p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
701 tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
702
703 if (!m->is_native()) {
704 Symbol* source_name = k->source_file_name();
705 int line_number = m->line_number_from_bci(bci());
706 if (source_name != nullptr && (line_number != -1)) {
707 tty->print("(%s:%d)", source_name->as_C_string(), line_number);
708 }
709 } else {
710 tty->print("(Native Method)");
711 }
712 // Check frame size and print warning if it looks suspiciously large
713 if (fr().sp() != nullptr) {
714 RegisterMap map = *register_map();
715 uint size = fr().frame_size();
716 #ifdef _LP64
717 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
718 #else
719 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
720 #endif
721 }
722 }
723
724 void javaVFrame::print_activation(int index) const {
725 // frame number and method
726 tty->print("%2d - ", index);
727 ((vframe*)this)->print_value();
728 tty->cr();
729
730 if (WizardMode) {
731 ((vframe*)this)->print();
732 tty->cr();
733 }
734 }
735
736 // ------------- externalVFrame --------------
737
738 void externalVFrame::print() {
739 _fr.print_value_on(tty,nullptr);
740 }
741
742 void externalVFrame::print_value() const {
743 ((vframe*)this)->print();
744 }
745 #endif // PRODUCT