1 /* 2 * Copyright (c) 1997, 2023, 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_compiled()) { 75 CompiledMethod* nm = (CompiledMethod*)cb; 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 ( // we have marked ourself as pending on this monitor 251 mark.monitor() == thread()->current_pending_monitor() || 252 // we are not the owner of this monitor 253 !mark.monitor()->is_entered(thread()) 254 )) { 255 lock_state = "waiting to lock"; 256 } 257 } 258 print_locked_object_class_name(st, Handle(current, monitor->owner()), lock_state); 259 260 found_first_monitor = true; 261 } 262 } 263 } 264 } 265 266 // ------------- interpretedVFrame -------------- 267 268 u_char* interpretedVFrame::bcp() const { 269 return stack_chunk() == nullptr ? fr().interpreter_frame_bcp() : stack_chunk()->interpreter_frame_bcp(fr()); 270 } 271 272 intptr_t* interpretedVFrame::locals_addr_at(int offset) const { 273 assert(stack_chunk() == nullptr, "Not supported for heap frames"); // unsupported for now because seems to be unused 274 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame"); 275 return fr().interpreter_frame_local_at(offset); 276 } 277 278 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const { 279 bool heap_frame = stack_chunk() != nullptr; 280 frame f = !heap_frame ? _fr : stack_chunk()->derelativize(_fr); 281 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5); 282 for (BasicObjectLock* current = (f.previous_monitor_in_interpreter_frame(f.interpreter_frame_monitor_begin())); 283 current >= f.interpreter_frame_monitor_end(); 284 current = f.previous_monitor_in_interpreter_frame(current)) { 285 oop owner = !heap_frame ? current->obj() : StackValue::create_stack_value_from_oop_location(stack_chunk(), (void*)current->obj_adr())->get_obj()(); 286 result->push(new MonitorInfo(owner, current->lock(), false, false)); 287 } 288 return result; 289 } 290 291 int interpretedVFrame::bci() const { 292 return method()->bci_from(bcp()); 293 } 294 295 Method* interpretedVFrame::method() const { 296 return stack_chunk() == nullptr ? fr().interpreter_frame_method() : stack_chunk()->interpreter_frame_method(fr()); 297 } 298 299 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask, 300 int index, 301 const intptr_t* const addr, 302 stackChunkOop chunk) { 303 304 assert(index >= 0 && index < oop_mask.number_of_entries(), "invariant"); 305 306 // categorize using oop_mask 307 if (oop_mask.is_oop(index)) { 308 return StackValue::create_stack_value_from_oop_location(chunk, (void*)addr); 309 } 310 // value (integer) "v" 311 return new StackValue(addr != nullptr ? *addr : 0); 312 } 313 314 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) { 315 assert(addr != nullptr, "invariant"); 316 317 // Ensure to be 'inside' the expression stack (i.e., addr >= sp for Intel). 318 // In case of exceptions, the expression stack is invalid and the sp 319 // will be reset to express this condition. 320 if (frame::interpreter_frame_expression_stack_direction() > 0) { 321 return addr <= fr.interpreter_frame_tos_address(); 322 } 323 324 return addr >= fr.interpreter_frame_tos_address(); 325 } 326 327 static void stack_locals(StackValueCollection* result, 328 int length, 329 const InterpreterOopMap& oop_mask, 330 const frame& fr, 331 const stackChunkOop chunk) { 332 333 assert(result != nullptr, "invariant"); 334 335 for (int i = 0; i < length; ++i) { 336 const intptr_t* addr; 337 if (chunk == nullptr) { 338 addr = fr.interpreter_frame_local_at(i); 339 assert(addr >= fr.sp(), "must be inside the frame"); 340 } else { 341 addr = chunk->interpreter_frame_local_at(fr, i); 342 } 343 assert(addr != nullptr, "invariant"); 344 345 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr, chunk); 346 assert(sv != nullptr, "sanity check"); 347 348 result->add(sv); 349 } 350 } 351 352 static void stack_expressions(StackValueCollection* result, 353 int length, 354 int max_locals, 355 const InterpreterOopMap& oop_mask, 356 const frame& fr, 357 const stackChunkOop chunk) { 358 359 assert(result != nullptr, "invariant"); 360 361 for (int i = 0; i < length; ++i) { 362 const intptr_t* addr; 363 if (chunk == nullptr) { 364 addr = fr.interpreter_frame_expression_stack_at(i); 365 assert(addr != nullptr, "invariant"); 366 if (!is_in_expression_stack(fr, addr)) { 367 // Need to ensure no bogus escapes. 368 addr = nullptr; 369 } 370 } else { 371 addr = chunk->interpreter_frame_expression_stack_at(fr, i); 372 } 373 374 StackValue* const sv = create_stack_value_from_oop_map(oop_mask, 375 i + max_locals, 376 addr, 377 chunk); 378 assert(sv != nullptr, "sanity check"); 379 380 result->add(sv); 381 } 382 } 383 384 StackValueCollection* interpretedVFrame::locals() const { 385 return stack_data(false); 386 } 387 388 StackValueCollection* interpretedVFrame::expressions() const { 389 return stack_data(true); 390 } 391 392 /* 393 * Worker routine for fetching references and/or values 394 * for a particular bci in the interpretedVFrame. 395 * 396 * Returns data for either "locals" or "expressions", 397 * using bci relative oop_map (oop_mask) information. 398 * 399 * @param expressions bool switch controlling what data to return 400 (false == locals / true == expression) 401 * 402 */ 403 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const { 404 405 InterpreterOopMap oop_mask; 406 method()->mask_for(bci(), &oop_mask); 407 const int mask_len = oop_mask.number_of_entries(); 408 409 // If the method is native, method()->max_locals() is not telling the truth. 410 // For our purposes, max locals instead equals the size of parameters. 411 const int max_locals = method()->is_native() ? 412 method()->size_of_parameters() : method()->max_locals(); 413 414 assert(mask_len >= max_locals, "invariant"); 415 416 const int length = expressions ? mask_len - max_locals : max_locals; 417 assert(length >= 0, "invariant"); 418 419 StackValueCollection* const result = new StackValueCollection(length); 420 421 if (0 == length) { 422 return result; 423 } 424 425 if (expressions) { 426 stack_expressions(result, length, max_locals, oop_mask, fr(), stack_chunk()); 427 } else { 428 stack_locals(result, length, oop_mask, fr(), stack_chunk()); 429 } 430 431 assert(length == result->size(), "invariant"); 432 433 return result; 434 } 435 436 void interpretedVFrame::set_locals(StackValueCollection* values) const { 437 if (values == nullptr || values->size() == 0) return; 438 439 // If the method is native, max_locals is not telling the truth. 440 // maxlocals then equals the size of parameters 441 const int max_locals = method()->is_native() ? 442 method()->size_of_parameters() : method()->max_locals(); 443 444 assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data"); 445 446 // handle locals 447 for (int i = 0; i < max_locals; i++) { 448 // Find stack location 449 intptr_t *addr = locals_addr_at(i); 450 451 // Depending on oop/int put it in the right package 452 const StackValue* const sv = values->at(i); 453 assert(sv != nullptr, "sanity check"); 454 if (sv->type() == T_OBJECT) { 455 *(oop *) addr = (sv->get_obj())(); 456 } else { // integer 457 *addr = sv->get_intptr(); 458 } 459 } 460 } 461 462 // ------------- cChunk -------------- 463 464 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread) 465 : externalVFrame(fr, reg_map, thread) {} 466 467 MonitorInfo::MonitorInfo(oop owner, BasicLock* lock, bool eliminated, bool owner_is_scalar_replaced) { 468 Thread* thread = Thread::current(); 469 if (!owner_is_scalar_replaced) { 470 _owner = Handle(thread, owner); 471 _owner_klass = Handle(); 472 } else { 473 assert(eliminated, "monitor should be eliminated for scalar replaced object"); 474 _owner = Handle(); 475 _owner_klass = Handle(thread, owner); 476 } 477 _lock = lock; 478 _eliminated = eliminated; 479 _owner_is_scalar_replaced = owner_is_scalar_replaced; 480 } 481 482 #ifdef ASSERT 483 void vframeStreamCommon::found_bad_method_frame() const { 484 // 6379830 Cut point for an assertion that occasionally fires when 485 // we are using the performance analyzer. 486 // Disable this when testing the analyzer with fastdebug. 487 fatal("invalid bci or invalid scope desc"); 488 } 489 #endif 490 491 vframeStream::vframeStream(JavaThread* thread, Handle continuation_scope, bool stop_at_java_call_stub) 492 : vframeStreamCommon(RegisterMap(thread, 493 RegisterMap::UpdateMap::include, 494 RegisterMap::ProcessFrames::include, 495 RegisterMap::WalkContinuation::include)) { 496 497 _stop_at_java_call_stub = stop_at_java_call_stub; 498 _continuation_scope = continuation_scope; 499 500 if (!thread->has_last_Java_frame()) { 501 _mode = at_end_mode; 502 return; 503 } 504 505 _frame = _thread->last_frame(); 506 _cont_entry = _thread->last_continuation(); 507 while (!fill_from_frame()) { 508 _frame = _frame.sender(&_reg_map); 509 } 510 } 511 512 vframeStream::vframeStream(oop continuation, Handle continuation_scope) 513 : vframeStreamCommon(RegisterMap(continuation, RegisterMap::UpdateMap::include)) { 514 515 _stop_at_java_call_stub = false; 516 _continuation_scope = continuation_scope; 517 518 if (!Continuation::has_last_Java_frame(continuation, &_frame, &_reg_map)) { 519 _mode = at_end_mode; 520 return; 521 } 522 523 // _chunk = _reg_map.stack_chunk(); 524 while (!fill_from_frame()) { 525 _frame = _frame.sender(&_reg_map); 526 } 527 } 528 529 530 // Step back n frames, skip any pseudo frames in between. 531 // This function is used in Class.forName, Class.newInstance, Method.Invoke, 532 // AccessController.doPrivileged. 533 void vframeStreamCommon::security_get_caller_frame(int depth) { 534 assert(depth >= 0, "invalid depth: %d", depth); 535 for (int n = 0; !at_end(); security_next()) { 536 if (!method()->is_ignored_by_security_stack_walk()) { 537 if (n == depth) { 538 // We have reached the desired depth; return. 539 return; 540 } 541 n++; // this is a non-skipped frame; count it against the depth 542 } 543 } 544 // NOTE: At this point there were not enough frames on the stack 545 // to walk to depth. Callers of this method have to check for at_end. 546 } 547 548 549 void vframeStreamCommon::security_next() { 550 if (method()->is_prefixed_native()) { 551 skip_prefixed_method_and_wrappers(); // calls next() 552 } else { 553 next(); 554 } 555 } 556 557 558 void vframeStreamCommon::skip_prefixed_method_and_wrappers() { 559 ResourceMark rm; 560 561 int method_prefix_count = 0; 562 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count); 563 Klass* prefixed_klass = method()->method_holder(); 564 const char* prefixed_name = method()->name()->as_C_string(); 565 size_t prefixed_name_len = strlen(prefixed_name); 566 int prefix_index = method_prefix_count-1; 567 568 while (!at_end()) { 569 next(); 570 if (method()->method_holder() != prefixed_klass) { 571 break; // classes don't match, can't be a wrapper 572 } 573 const char* name = method()->name()->as_C_string(); 574 size_t name_len = strlen(name); 575 size_t prefix_len = prefixed_name_len - name_len; 576 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) { 577 break; // prefixed name isn't prefixed version of method name, can't be a wrapper 578 } 579 for (; prefix_index >= 0; --prefix_index) { 580 const char* possible_prefix = method_prefixes[prefix_index]; 581 size_t possible_prefix_len = strlen(possible_prefix); 582 if (possible_prefix_len == prefix_len && 583 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) { 584 break; // matching prefix found 585 } 586 } 587 if (prefix_index < 0) { 588 break; // didn't find the prefix, can't be a wrapper 589 } 590 prefixed_name = name; 591 prefixed_name_len = name_len; 592 } 593 } 594 595 javaVFrame* vframeStreamCommon::asJavaVFrame() { 596 javaVFrame* result = nullptr; 597 // FIXME, need to re-do JDK-8271140 and check is_native_frame? 598 if (_mode == compiled_mode && _frame.is_compiled_frame()) { 599 assert(_frame.is_compiled_frame() || _frame.is_native_frame(), "expected compiled Java frame"); 600 guarantee(_reg_map.update_map(), ""); 601 602 compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread)); 603 604 guarantee(cvf->cb() == cb(), "wrong code blob"); 605 606 cvf = cvf->at_scope(_decode_offset, _vframe_id); // get the same scope as this stream 607 608 guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope"); 609 guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope"); 610 guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe"); 611 612 result = cvf; 613 } else { 614 result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread)); 615 } 616 assert(result->method() == method(), "wrong method"); 617 return result; 618 } 619 620 #ifndef PRODUCT 621 void vframe::print() { 622 if (WizardMode) _fr.print_value_on(tty,nullptr); 623 } 624 625 void vframe::print_value() const { 626 ((vframe*)this)->print(); 627 } 628 629 630 void entryVFrame::print_value() const { 631 ((entryVFrame*)this)->print(); 632 } 633 634 void entryVFrame::print() { 635 vframe::print(); 636 tty->print_cr("C Chunk in between Java"); 637 tty->print_cr("C link " INTPTR_FORMAT, p2i(_fr.link())); 638 } 639 640 641 // ------------- javaVFrame -------------- 642 643 static void print_stack_values(const char* title, StackValueCollection* values) { 644 if (values->is_empty()) return; 645 tty->print_cr("\t%s:", title); 646 values->print(); 647 } 648 649 650 void javaVFrame::print() { 651 Thread* current_thread = Thread::current(); 652 ResourceMark rm(current_thread); 653 HandleMark hm(current_thread); 654 655 vframe::print(); 656 tty->print("\t"); 657 method()->print_value(); 658 tty->cr(); 659 tty->print_cr("\tbci: %d", bci()); 660 661 print_stack_values("locals", locals()); 662 print_stack_values("expressions", expressions()); 663 664 GrowableArray<MonitorInfo*>* list = monitors(); 665 if (list->is_empty()) return; 666 tty->print_cr("\tmonitor list:"); 667 for (int index = (list->length()-1); index >= 0; index--) { 668 MonitorInfo* monitor = list->at(index); 669 tty->print("\t obj\t"); 670 if (monitor->owner_is_scalar_replaced()) { 671 Klass* k = java_lang_Class::as_Klass(monitor->owner_klass()); 672 tty->print("( is scalar replaced %s)", k->external_name()); 673 } else if (monitor->owner() == nullptr) { 674 tty->print("( null )"); 675 } else { 676 monitor->owner()->print_value(); 677 tty->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner())); 678 } 679 if (monitor->eliminated()) { 680 if(is_compiled_frame()) { 681 tty->print(" ( lock is eliminated in compiled frame )"); 682 } else { 683 tty->print(" ( lock is eliminated, frame not compiled )"); 684 } 685 } 686 tty->cr(); 687 tty->print("\t "); 688 monitor->lock()->print_on(tty, monitor->owner()); 689 tty->cr(); 690 } 691 } 692 693 694 void javaVFrame::print_value() const { 695 Method* m = method(); 696 InstanceKlass* k = m->method_holder(); 697 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")", 698 p2i(_fr.sp()), p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc())); 699 tty->print("%s.%s", k->internal_name(), m->name()->as_C_string()); 700 701 if (!m->is_native()) { 702 Symbol* source_name = k->source_file_name(); 703 int line_number = m->line_number_from_bci(bci()); 704 if (source_name != nullptr && (line_number != -1)) { 705 tty->print("(%s:%d)", source_name->as_C_string(), line_number); 706 } 707 } else { 708 tty->print("(Native Method)"); 709 } 710 // Check frame size and print warning if it looks suspiciously large 711 if (fr().sp() != nullptr) { 712 RegisterMap map = *register_map(); 713 uint size = fr().frame_size(); 714 #ifdef _LP64 715 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size); 716 #else 717 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size); 718 #endif 719 } 720 } 721 722 void javaVFrame::print_activation(int index) const { 723 // frame number and method 724 tty->print("%2d - ", index); 725 ((vframe*)this)->print_value(); 726 tty->cr(); 727 728 if (WizardMode) { 729 ((vframe*)this)->print(); 730 tty->cr(); 731 } 732 } 733 734 // ------------- externalVFrame -------------- 735 736 void externalVFrame::print() { 737 _fr.print_value_on(tty,nullptr); 738 } 739 740 void externalVFrame::print_value() const { 741 ((vframe*)this)->print(); 742 } 743 #endif // PRODUCT