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