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() == OBJECT_WAIT) {
209 // We are waiting on an Object monitor but Object.wait() isn't the
210 // top-frame, so we should be waiting on a Class initialization monitor.
211 InstanceKlass* k = thread()->class_to_be_initialized();
212 if (k != nullptr) {
213 st->print_cr("\t- waiting on the Class initialization monitor for %s", k->external_name());
214 }
215 }
216 }
217
218 // Print out all monitors that we have locked, or are trying to lock,
219 // including re-locking after being notified or timing out in a wait().
220 GrowableArray<MonitorInfo*>* mons = monitors();
221 if (!mons->is_empty()) {
222 bool found_first_monitor = false;
223 for (int index = (mons->length()-1); index >= 0; index--) {
224 MonitorInfo* monitor = mons->at(index);
225 if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
226 if (monitor->owner_is_scalar_replaced()) {
227 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
228 st->print_cr("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
229 } else {
230 Handle obj(current, monitor->owner());
231 if (obj() != nullptr) {
232 print_locked_object_class_name(st, obj, "eliminated");
233 }
234 }
235 continue;
236 }
237 if (monitor->owner() != nullptr) {
238 // the monitor is associated with an object, i.e., it is locked
239
240 const char *lock_state = "locked"; // assume we have the monitor locked
241 if (!found_first_monitor && frame_count == 0) {
242 // If this is the first frame and we haven't found an owned
243 // monitor before, then we need to see if we have completed
244 // the lock or if we are blocked trying to acquire it. Only
245 // an inflated monitor that is first on the monitor list in
246 // the first frame can block us on a monitor enter.
247 markWord mark = monitor->owner()->mark();
248 // The first stage of async deflation does not affect any field
249 // used by this comparison so the ObjectMonitor* is usable here.
250 if (mark.has_monitor()) {
251 ObjectMonitor* mon = ObjectSynchronizer::read_monitor(current, monitor->owner(), mark);
252 if (// if the monitor is null we must be in the process of locking
253 mon == nullptr ||
254 // we have marked ourself as pending on this monitor
255 mon == thread()->current_pending_monitor() ||
256 // we are not the owner of this monitor
257 !mon->is_entered(thread())) {
258 lock_state = "waiting to lock";
259 }
260 }
261 }
262 print_locked_object_class_name(st, Handle(current, monitor->owner()), lock_state);
263
264 found_first_monitor = true;
265 }
266 }
267 }
268 }
269
270 // ------------- interpretedVFrame --------------
271
272 u_char* interpretedVFrame::bcp() const {
273 return stack_chunk() == nullptr ? fr().interpreter_frame_bcp() : stack_chunk()->interpreter_frame_bcp(fr());
274 }
275
276 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
277 assert(stack_chunk() == nullptr, "Not supported for heap frames"); // unsupported for now because seems to be unused
278 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
279 return fr().interpreter_frame_local_at(offset);
280 }
281
282 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
283 bool heap_frame = stack_chunk() != nullptr;
284 frame f = !heap_frame ? _fr : stack_chunk()->derelativize(_fr);
285 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
286 for (BasicObjectLock* current = (f.previous_monitor_in_interpreter_frame(f.interpreter_frame_monitor_begin()));
287 current >= f.interpreter_frame_monitor_end();
288 current = f.previous_monitor_in_interpreter_frame(current)) {
289 oop owner = !heap_frame ? current->obj() : StackValue::create_stack_value_from_oop_location(stack_chunk(), (void*)current->obj_adr())->get_obj()();
290 result->push(new MonitorInfo(owner, current->lock(), false, false));
291 }
292 return result;
293 }
294
295 int interpretedVFrame::bci() const {
296 return method()->bci_from(bcp());
297 }
298
299 Method* interpretedVFrame::method() const {
300 return stack_chunk() == nullptr ? fr().interpreter_frame_method() : stack_chunk()->interpreter_frame_method(fr());
301 }
302
303 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
304 int index,
305 const intptr_t* const addr,
306 stackChunkOop chunk) {
307
308 assert(index >= 0 && index < oop_mask.number_of_entries(), "invariant");
309
310 // categorize using oop_mask
311 if (oop_mask.is_oop(index)) {
312 return StackValue::create_stack_value_from_oop_location(chunk, (void*)addr);
313 }
314 // value (integer) "v"
315 return new StackValue(addr != nullptr ? *addr : 0);
316 }
317
318 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
319 assert(addr != nullptr, "invariant");
320
321 // Ensure to be 'inside' the expression stack (i.e., addr >= sp for Intel).
322 // In case of exceptions, the expression stack is invalid and the sp
323 // will be reset to express this condition.
324 if (frame::interpreter_frame_expression_stack_direction() > 0) {
325 return addr <= fr.interpreter_frame_tos_address();
326 }
327
328 return addr >= fr.interpreter_frame_tos_address();
329 }
330
331 static void stack_locals(StackValueCollection* result,
332 int length,
333 const InterpreterOopMap& oop_mask,
334 const frame& fr,
335 const stackChunkOop chunk) {
336
337 assert(result != nullptr, "invariant");
338
339 for (int i = 0; i < length; ++i) {
340 const intptr_t* addr;
341 if (chunk == nullptr) {
342 addr = fr.interpreter_frame_local_at(i);
343 assert(addr >= fr.sp(), "must be inside the frame");
344 } else {
345 addr = chunk->interpreter_frame_local_at(fr, i);
346 }
347 assert(addr != nullptr, "invariant");
348
349 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr, chunk);
350 assert(sv != nullptr, "sanity check");
351
352 result->add(sv);
353 }
354 }
355
356 static void stack_expressions(StackValueCollection* result,
357 int length,
358 int max_locals,
359 const InterpreterOopMap& oop_mask,
360 const frame& fr,
361 const stackChunkOop chunk) {
362
363 assert(result != nullptr, "invariant");
364
365 for (int i = 0; i < length; ++i) {
366 const intptr_t* addr;
367 if (chunk == nullptr) {
368 addr = fr.interpreter_frame_expression_stack_at(i);
369 assert(addr != nullptr, "invariant");
370 if (!is_in_expression_stack(fr, addr)) {
371 // Need to ensure no bogus escapes.
372 addr = nullptr;
373 }
374 } else {
375 addr = chunk->interpreter_frame_expression_stack_at(fr, i);
376 }
377
378 StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
379 i + max_locals,
380 addr,
381 chunk);
382 assert(sv != nullptr, "sanity check");
383
384 result->add(sv);
385 }
386 }
387
388 StackValueCollection* interpretedVFrame::locals() const {
389 return stack_data(false);
390 }
391
392 StackValueCollection* interpretedVFrame::expressions() const {
393 return stack_data(true);
394 }
395
396 /*
397 * Worker routine for fetching references and/or values
398 * for a particular bci in the interpretedVFrame.
399 *
400 * Returns data for either "locals" or "expressions",
401 * using bci relative oop_map (oop_mask) information.
402 *
403 * @param expressions bool switch controlling what data to return
404 (false == locals / true == expression)
405 *
406 */
407 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
408
409 InterpreterOopMap oop_mask;
410 method()->mask_for(bci(), &oop_mask);
411 const int mask_len = oop_mask.number_of_entries();
412
413 // If the method is native, method()->max_locals() is not telling the truth.
414 // For our purposes, max locals instead equals the size of parameters.
415 const int max_locals = method()->is_native() ?
416 method()->size_of_parameters() : method()->max_locals();
417
418 assert(mask_len >= max_locals, "invariant");
419
420 const int length = expressions ? mask_len - max_locals : max_locals;
421 assert(length >= 0, "invariant");
422
423 StackValueCollection* const result = new StackValueCollection(length);
424
425 if (0 == length) {
426 return result;
427 }
428
429 if (expressions) {
430 stack_expressions(result, length, max_locals, oop_mask, fr(), stack_chunk());
431 } else {
432 stack_locals(result, length, oop_mask, fr(), stack_chunk());
433 }
434
435 assert(length == result->size(), "invariant");
436
437 return result;
438 }
439
440 void interpretedVFrame::set_locals(StackValueCollection* values) const {
441 if (values == nullptr || values->size() == 0) return;
442
443 // If the method is native, max_locals is not telling the truth.
444 // maxlocals then equals the size of parameters
445 const int max_locals = method()->is_native() ?
446 method()->size_of_parameters() : method()->max_locals();
447
448 assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
449
450 // handle locals
451 for (int i = 0; i < max_locals; i++) {
452 // Find stack location
453 intptr_t *addr = locals_addr_at(i);
454
455 // Depending on oop/int put it in the right package
456 const StackValue* const sv = values->at(i);
457 assert(sv != nullptr, "sanity check");
458 if (sv->type() == T_OBJECT) {
459 *(oop *) addr = (sv->get_obj())();
460 } else { // integer
461 *addr = sv->get_intptr();
462 }
463 }
464 }
465
466 // ------------- cChunk --------------
467
468 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
469 : externalVFrame(fr, reg_map, thread) {}
470
471 MonitorInfo::MonitorInfo(oop owner, BasicLock* lock, bool eliminated, bool owner_is_scalar_replaced) {
472 Thread* thread = Thread::current();
473 if (!owner_is_scalar_replaced) {
474 _owner = Handle(thread, owner);
475 _owner_klass = Handle();
476 } else {
477 assert(eliminated, "monitor should be eliminated for scalar replaced object");
478 _owner = Handle();
479 _owner_klass = Handle(thread, owner);
480 }
481 _lock = lock;
482 _eliminated = eliminated;
483 _owner_is_scalar_replaced = owner_is_scalar_replaced;
484 }
485
486 #ifdef ASSERT
487 void vframeStreamCommon::found_bad_method_frame() const {
488 // 6379830 Cut point for an assertion that occasionally fires when
489 // we are using the performance analyzer.
490 // Disable this when testing the analyzer with fastdebug.
491 fatal("invalid bci or invalid scope desc");
492 }
493 #endif
494
495 vframeStream::vframeStream(JavaThread* thread, Handle continuation_scope, bool stop_at_java_call_stub)
496 : vframeStreamCommon(RegisterMap(thread,
497 RegisterMap::UpdateMap::include,
498 RegisterMap::ProcessFrames::include,
499 RegisterMap::WalkContinuation::include)) {
500
501 _stop_at_java_call_stub = stop_at_java_call_stub;
502 _continuation_scope = continuation_scope;
503
504 if (!thread->has_last_Java_frame()) {
505 _mode = at_end_mode;
506 return;
507 }
508
509 _frame = _thread->last_frame();
510 _cont_entry = _thread->last_continuation();
511 while (!fill_from_frame()) {
512 _frame = _frame.sender(&_reg_map);
513 }
514 }
515
516 vframeStream::vframeStream(oop continuation, Handle continuation_scope)
517 : vframeStreamCommon(RegisterMap(continuation, RegisterMap::UpdateMap::include)) {
518
519 _stop_at_java_call_stub = false;
520 _continuation_scope = continuation_scope;
521
522 if (!Continuation::has_last_Java_frame(continuation, &_frame, &_reg_map)) {
523 _mode = at_end_mode;
524 return;
525 }
526
527 // _chunk = _reg_map.stack_chunk();
528 while (!fill_from_frame()) {
529 _frame = _frame.sender(&_reg_map);
530 }
531 }
532
533
534 // Step back n frames, skip any pseudo frames in between.
535 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
536 // AccessController.doPrivileged.
537 void vframeStreamCommon::security_get_caller_frame(int depth) {
538 assert(depth >= 0, "invalid depth: %d", depth);
539 for (int n = 0; !at_end(); security_next()) {
540 if (!method()->is_ignored_by_security_stack_walk()) {
541 if (n == depth) {
542 // We have reached the desired depth; return.
543 return;
544 }
545 n++; // this is a non-skipped frame; count it against the depth
546 }
547 }
548 // NOTE: At this point there were not enough frames on the stack
549 // to walk to depth. Callers of this method have to check for at_end.
550 }
551
552
553 void vframeStreamCommon::security_next() {
554 if (method()->is_prefixed_native()) {
555 skip_prefixed_method_and_wrappers(); // calls next()
556 } else {
557 next();
558 }
559 }
560
561
562 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
563 ResourceMark rm;
564
565 int method_prefix_count = 0;
566 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
567 Klass* prefixed_klass = method()->method_holder();
568 const char* prefixed_name = method()->name()->as_C_string();
569 size_t prefixed_name_len = strlen(prefixed_name);
570 int prefix_index = method_prefix_count-1;
571
572 while (!at_end()) {
573 next();
574 if (method()->method_holder() != prefixed_klass) {
575 break; // classes don't match, can't be a wrapper
576 }
577 const char* name = method()->name()->as_C_string();
578 size_t name_len = strlen(name);
579 size_t prefix_len = prefixed_name_len - name_len;
580 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
581 break; // prefixed name isn't prefixed version of method name, can't be a wrapper
582 }
583 for (; prefix_index >= 0; --prefix_index) {
584 const char* possible_prefix = method_prefixes[prefix_index];
585 size_t possible_prefix_len = strlen(possible_prefix);
586 if (possible_prefix_len == prefix_len &&
587 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
588 break; // matching prefix found
589 }
590 }
591 if (prefix_index < 0) {
592 break; // didn't find the prefix, can't be a wrapper
593 }
594 prefixed_name = name;
595 prefixed_name_len = name_len;
596 }
597 }
598
599 javaVFrame* vframeStreamCommon::asJavaVFrame() {
600 javaVFrame* result = nullptr;
601 // FIXME, need to re-do JDK-8271140 and check is_native_frame?
602 if (_mode == compiled_mode && _frame.is_compiled_frame()) {
603 assert(_frame.is_compiled_frame() || _frame.is_native_frame(), "expected compiled Java frame");
604 guarantee(_reg_map.update_map(), "");
605
606 compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
607
608 guarantee(cvf->cb() == cb(), "wrong code blob");
609
610 cvf = cvf->at_scope(_decode_offset, _vframe_id); // get the same scope as this stream
611
612 guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope");
613 guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope");
614 guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe");
615
616 result = cvf;
617 } else {
618 result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
619 }
620 assert(result->method() == method(), "wrong method");
621 return result;
622 }
623
624 #ifndef PRODUCT
625 void vframe::print(outputStream* output) {
626 if (WizardMode) _fr.print_value_on(output);
627 }
628
629 void vframe::print_value(outputStream* output) const {
630 ((vframe*)this)->print(output);
631 }
632
633
634 void entryVFrame::print_value(outputStream* output) const {
635 ((entryVFrame*)this)->print(output);
636 }
637
638 void entryVFrame::print(outputStream* output) {
639 vframe::print(output);
640 output->print_cr("C Chunk in between Java");
641 output->print_cr("C link " INTPTR_FORMAT, p2i(_fr.link()));
642 }
643
644
645 // ------------- javaVFrame --------------
646
647 static void print_stack_values(outputStream* output, const char* title, StackValueCollection* values) {
648 if (values->is_empty()) return;
649 output->print_cr("\t%s:", title);
650 values->print();
651 }
652
653
654 void javaVFrame::print(outputStream* output) {
655 Thread* current_thread = Thread::current();
656 ResourceMark rm(current_thread);
657 HandleMark hm(current_thread);
658
659 vframe::print(output);
660 output->print("\t");
661 method()->print_value();
662 output->cr();
663 output->print_cr("\tbci: %d", bci());
664
665 print_stack_values(output, "locals", locals());
666 print_stack_values(output, "expressions", expressions());
667
668 GrowableArray<MonitorInfo*>* list = monitors();
669 if (list->is_empty()) return;
670 output->print_cr("\tmonitor list:");
671 for (int index = (list->length()-1); index >= 0; index--) {
672 MonitorInfo* monitor = list->at(index);
673 output->print("\t obj\t");
674 if (monitor->owner_is_scalar_replaced()) {
675 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
676 output->print("( is scalar replaced %s)", k->external_name());
677 } else if (monitor->owner() == nullptr) {
678 output->print("( null )");
679 } else {
680 monitor->owner()->print_value();
681 output->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
682 }
683 if (monitor->eliminated()) {
684 if(is_compiled_frame()) {
685 output->print(" ( lock is eliminated in compiled frame )");
686 } else {
687 output->print(" ( lock is eliminated, frame not compiled )");
688 }
689 }
690 output->cr();
691 output->print("\t ");
692 monitor->lock()->print_on(output, monitor->owner());
693 output->cr();
694 }
695 }
696
697
698 void javaVFrame::print_value(outputStream* output) const {
699 Method* m = method();
700 InstanceKlass* k = m->method_holder();
701 output->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
702 p2i(_fr.sp()), p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
703 output->print("%s.%s", k->internal_name(), m->name()->as_C_string());
704
705 if (!m->is_native()) {
706 Symbol* source_name = k->source_file_name();
707 int line_number = m->line_number_from_bci(bci());
708 if (source_name != nullptr && (line_number != -1)) {
709 output->print("(%s:%d)", source_name->as_C_string(), line_number);
710 }
711 } else {
712 output->print("(Native Method)");
713 }
714 // Check frame size and print warning if it looks suspiciously large
715 if (fr().sp() != nullptr) {
716 RegisterMap map = *register_map();
717 uint size = fr().frame_size();
718 #ifdef _LP64
719 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
720 #else
721 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
722 #endif
723 }
724 }
725
726 void javaVFrame::print_activation(int index, outputStream* output) const {
727 // frame number and method
728 output->print("%2d - ", index);
729 ((vframe*)this)->print_value();
730 output->cr();
731
732 if (WizardMode) {
733 ((vframe*)this)->print();
734 output->cr();
735 }
736 }
737
738 // ------------- externalVFrame --------------
739
740 void externalVFrame::print(outputStream* output) {
741 _fr.print_value_on(output);
742 }
743
744 void externalVFrame::print_value(outputStream* output) const {
745 ((vframe*)this)->print(output);
746 }
747 #endif // PRODUCT