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