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