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/moduleEntry.hpp" 27 #include "code/codeCache.hpp" 28 #include "code/scopeDesc.hpp" 29 #include "code/vmreg.inline.hpp" 30 #include "compiler/abstractCompiler.hpp" 31 #include "compiler/disassembler.hpp" 32 #include "compiler/oopMap.hpp" 33 #include "gc/shared/collectedHeap.inline.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "interpreter/oopMapCache.hpp" 36 #include "logging/log.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.hpp" 39 #include "oops/markWord.hpp" 40 #include "oops/method.inline.hpp" 41 #include "oops/methodData.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/stackChunkOop.inline.hpp" 44 #include "oops/verifyOopClosure.hpp" 45 #include "prims/methodHandles.hpp" 46 #include "runtime/continuation.hpp" 47 #include "runtime/continuationEntry.inline.hpp" 48 #include "runtime/frame.inline.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/javaThread.hpp" 52 #include "runtime/monitorChunk.hpp" 53 #include "runtime/os.hpp" 54 #include "runtime/sharedRuntime.hpp" 55 #include "runtime/safefetch.hpp" 56 #include "runtime/signature.hpp" 57 #include "runtime/stackValue.hpp" 58 #include "runtime/stubCodeGenerator.hpp" 59 #include "runtime/stubRoutines.hpp" 60 #include "utilities/debug.hpp" 61 #include "utilities/decoder.hpp" 62 #include "utilities/formatBuffer.hpp" 63 64 RegisterMap::RegisterMap(JavaThread *thread, UpdateMap update_map, ProcessFrames process_frames, WalkContinuation walk_cont) { 65 _thread = thread; 66 _update_map = update_map == UpdateMap::include; 67 _process_frames = process_frames == ProcessFrames::include; 68 _walk_cont = walk_cont == WalkContinuation::include; 69 clear(); 70 DEBUG_ONLY (_update_for_id = nullptr;) 71 NOT_PRODUCT(_skip_missing = false;) 72 NOT_PRODUCT(_async = false;) 73 74 if (walk_cont == WalkContinuation::include && thread != nullptr && thread->last_continuation() != nullptr) { 75 _chunk = stackChunkHandle(Thread::current()->handle_area()->allocate_null_handle(), true /* dummy */); 76 } 77 _chunk_index = -1; 78 79 #ifndef PRODUCT 80 for (int i = 0; i < reg_count ; i++ ) _location[i] = nullptr; 81 #endif /* PRODUCT */ 82 } 83 84 RegisterMap::RegisterMap(oop continuation, UpdateMap update_map) { 85 _thread = nullptr; 86 _update_map = update_map == UpdateMap::include; 87 _process_frames = false; 88 _walk_cont = true; 89 clear(); 90 DEBUG_ONLY (_update_for_id = nullptr;) 91 NOT_PRODUCT(_skip_missing = false;) 92 NOT_PRODUCT(_async = false;) 93 94 _chunk = stackChunkHandle(Thread::current()->handle_area()->allocate_null_handle(), true /* dummy */); 95 _chunk_index = -1; 96 97 #ifndef PRODUCT 98 for (int i = 0; i < reg_count ; i++ ) _location[i] = nullptr; 99 #endif /* PRODUCT */ 100 } 101 102 RegisterMap::RegisterMap(const RegisterMap* map) { 103 assert(map != this, "bad initialization parameter"); 104 assert(map != nullptr, "RegisterMap must be present"); 105 _thread = map->thread(); 106 _update_map = map->update_map(); 107 _process_frames = map->process_frames(); 108 _walk_cont = map->_walk_cont; 109 _include_argument_oops = map->include_argument_oops(); 110 DEBUG_ONLY (_update_for_id = map->_update_for_id;) 111 NOT_PRODUCT(_skip_missing = map->_skip_missing;) 112 NOT_PRODUCT(_async = map->_async;) 113 114 // only the original RegisterMap's handle lives long enough for StackWalker; this is bound to cause trouble with nested continuations. 115 _chunk = map->_chunk; 116 _chunk_index = map->_chunk_index; 117 118 pd_initialize_from(map); 119 if (update_map()) { 120 for(int i = 0; i < location_valid_size; i++) { 121 LocationValidType bits = map->_location_valid[i]; 122 _location_valid[i] = bits; 123 // for whichever bits are set, pull in the corresponding map->_location 124 int j = i*location_valid_type_size; 125 while (bits != 0) { 126 if ((bits & 1) != 0) { 127 assert(0 <= j && j < reg_count, "range check"); 128 _location[j] = map->_location[j]; 129 } 130 bits >>= 1; 131 j += 1; 132 } 133 } 134 } 135 } 136 137 oop RegisterMap::cont() const { 138 return _chunk() != nullptr ? _chunk()->cont() : (oop)nullptr; 139 } 140 141 void RegisterMap::set_stack_chunk(stackChunkOop chunk) { 142 assert(chunk == nullptr || _walk_cont, ""); 143 assert(chunk == nullptr || _chunk.not_null(), ""); 144 if (_chunk.is_null()) return; 145 log_trace(continuations)("set_stack_chunk: " INTPTR_FORMAT " this: " INTPTR_FORMAT, p2i((oopDesc*)chunk), p2i(this)); 146 _chunk.replace(chunk); // reuse handle. see comment above in the constructor 147 if (chunk == nullptr) { 148 _chunk_index = -1; 149 } else { 150 _chunk_index++; 151 } 152 } 153 154 void RegisterMap::clear() { 155 set_include_argument_oops(true); 156 if (update_map()) { 157 for(int i = 0; i < location_valid_size; i++) { 158 _location_valid[i] = 0; 159 } 160 pd_clear(); 161 } else { 162 pd_initialize(); 163 } 164 } 165 166 #ifndef PRODUCT 167 168 VMReg RegisterMap::find_register_spilled_here(void* p, intptr_t* sp) { 169 for(int i = 0; i < RegisterMap::reg_count; i++) { 170 VMReg r = VMRegImpl::as_VMReg(i); 171 if (p == location(r, sp)) return r; 172 } 173 return nullptr; 174 } 175 176 void RegisterMap::print_on(outputStream* st) const { 177 st->print_cr("Register map"); 178 for(int i = 0; i < reg_count; i++) { 179 180 VMReg r = VMRegImpl::as_VMReg(i); 181 intptr_t* src = (intptr_t*) location(r, nullptr); 182 if (src != nullptr) { 183 184 r->print_on(st); 185 st->print(" [" INTPTR_FORMAT "] = ", p2i(src)); 186 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { 187 st->print_cr("<misaligned>"); 188 } else { 189 st->print_cr(INTPTR_FORMAT, *src); 190 } 191 } 192 } 193 } 194 195 void RegisterMap::print() const { 196 print_on(tty); 197 } 198 199 #endif 200 // This returns the pc that if you were in the debugger you'd see. Not 201 // the idealized value in the frame object. This undoes the magic conversion 202 // that happens for deoptimized frames. In addition it makes the value the 203 // hardware would want to see in the native frame. The only user (at this point) 204 // is deoptimization. It likely no one else should ever use it. 205 206 address frame::raw_pc() const { 207 if (is_deoptimized_frame()) { 208 nmethod* nm = cb()->as_nmethod_or_null(); 209 assert(nm != nullptr, "only nmethod is expected here"); 210 if (nm->is_method_handle_return(pc())) 211 return nm->deopt_mh_handler_begin() - pc_return_offset; 212 else 213 return nm->deopt_handler_begin() - pc_return_offset; 214 } else { 215 return (pc() - pc_return_offset); 216 } 217 } 218 219 // Change the pc in a frame object. This does not change the actual pc in 220 // actual frame. To do that use patch_pc. 221 // 222 void frame::set_pc(address newpc) { 223 #ifdef ASSERT 224 if (_cb != nullptr && _cb->is_nmethod()) { 225 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); 226 } 227 #endif // ASSERT 228 229 // Unsafe to use the is_deoptimized tester after changing pc 230 _deopt_state = unknown; 231 _pc = newpc; 232 _cb = CodeCache::find_blob(_pc); 233 234 } 235 236 // type testers 237 bool frame::is_ignored_frame() const { 238 return false; // FIXME: some LambdaForm frames should be ignored 239 } 240 241 bool frame::is_native_frame() const { 242 return (_cb != nullptr && 243 _cb->is_nmethod() && 244 ((nmethod*)_cb)->is_native_method()); 245 } 246 247 bool frame::is_java_frame() const { 248 if (is_interpreted_frame()) return true; 249 if (is_compiled_frame()) return true; 250 return false; 251 } 252 253 bool frame::is_runtime_frame() const { 254 return (_cb != nullptr && _cb->is_runtime_stub()); 255 } 256 257 bool frame::is_safepoint_blob_frame() const { 258 return (_cb != nullptr && _cb->is_safepoint_stub()); 259 } 260 261 // testers 262 263 bool frame::is_first_java_frame() const { 264 RegisterMap map(JavaThread::current(), 265 RegisterMap::UpdateMap::skip, 266 RegisterMap::ProcessFrames::include, 267 RegisterMap::WalkContinuation::skip); // No update 268 frame s; 269 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); 270 return s.is_first_frame(); 271 } 272 273 bool frame::is_first_vthread_frame(JavaThread* thread) const { 274 return Continuation::is_continuation_enterSpecial(*this) 275 && Continuation::get_continuation_entry_for_entry_frame(thread, *this)->is_virtual_thread(); 276 } 277 278 bool frame::entry_frame_is_first() const { 279 return entry_frame_call_wrapper()->is_first_frame(); 280 } 281 282 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const { 283 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr(); 284 address addr = (address) jcw; 285 286 // addr must be within the usable part of the stack 287 if (thread->is_in_usable_stack(addr)) { 288 return *jcw; 289 } 290 291 return nullptr; 292 } 293 294 bool frame::is_entry_frame_valid(JavaThread* thread) const { 295 // Validate the JavaCallWrapper an entry frame must have 296 address jcw = (address)entry_frame_call_wrapper(); 297 if (!thread->is_in_stack_range_excl(jcw, (address)fp())) { 298 return false; 299 } 300 301 // Validate sp saved in the java frame anchor 302 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); 303 return (jfa->last_Java_sp() > sp()); 304 } 305 306 Method* frame::safe_interpreter_frame_method() const { 307 Method** m_addr = interpreter_frame_method_addr(); 308 if (m_addr == nullptr) { 309 return nullptr; 310 } 311 return (Method*) SafeFetchN((intptr_t*) m_addr, 0); 312 } 313 314 bool frame::should_be_deoptimized() const { 315 if (_deopt_state == is_deoptimized || 316 !is_compiled_frame() ) return false; 317 assert(_cb != nullptr && _cb->is_nmethod(), "must be an nmethod"); 318 nmethod* nm = _cb->as_nmethod(); 319 LogTarget(Debug, dependencies) lt; 320 if (lt.is_enabled()) { 321 LogStream ls(<); 322 ls.print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); 323 nm->print_value_on(&ls); 324 ls.cr(); 325 } 326 327 if( !nm->is_marked_for_deoptimization() ) 328 return false; 329 330 // If at the return point, then the frame has already been popped, and 331 // only the return needs to be executed. Don't deoptimize here. 332 return !nm->is_at_poll_return(pc()); 333 } 334 335 bool frame::can_be_deoptimized() const { 336 if (!is_compiled_frame()) return false; 337 nmethod* nm = _cb->as_nmethod(); 338 339 if(!nm->can_be_deoptimized()) 340 return false; 341 342 return !nm->is_at_poll_return(pc()); 343 } 344 345 void frame::deoptimize(JavaThread* thread) { 346 assert(thread == nullptr 347 || (thread->frame_anchor()->has_last_Java_frame() && 348 thread->frame_anchor()->walkable()), "must be"); 349 // Schedule deoptimization of an nmethod activation with this frame. 350 assert(_cb != nullptr && _cb->is_nmethod(), "must be"); 351 352 // If the call site is a MethodHandle call site use the MH deopt handler. 353 nmethod* nm = _cb->as_nmethod(); 354 address deopt = nm->is_method_handle_return(pc()) ? 355 nm->deopt_mh_handler_begin() : 356 nm->deopt_handler_begin(); 357 358 NativePostCallNop* inst = nativePostCallNop_at(pc()); 359 360 // Save the original pc before we patch in the new one 361 nm->set_original_pc(this, pc()); 362 patch_pc(thread, deopt); 363 assert(is_deoptimized_frame(), "must be"); 364 365 #ifdef ASSERT 366 if (thread != nullptr) { 367 frame check = thread->last_frame(); 368 if (is_older(check.id())) { 369 RegisterMap map(thread, 370 RegisterMap::UpdateMap::skip, 371 RegisterMap::ProcessFrames::include, 372 RegisterMap::WalkContinuation::skip); 373 while (id() != check.id()) { 374 check = check.sender(&map); 375 } 376 assert(check.is_deoptimized_frame(), "missed deopt"); 377 } 378 } 379 #endif // ASSERT 380 } 381 382 frame frame::java_sender() const { 383 RegisterMap map(JavaThread::current(), 384 RegisterMap::UpdateMap::skip, 385 RegisterMap::ProcessFrames::include, 386 RegisterMap::WalkContinuation::skip); 387 frame s; 388 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; 389 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); 390 return s; 391 } 392 393 frame frame::real_sender(RegisterMap* map) const { 394 frame result = sender(map); 395 while (result.is_runtime_frame() || 396 result.is_ignored_frame()) { 397 result = result.sender(map); 398 } 399 return result; 400 } 401 402 // Interpreter frames 403 404 405 Method* frame::interpreter_frame_method() const { 406 assert(is_interpreted_frame(), "interpreted frame expected"); 407 Method* m = *interpreter_frame_method_addr(); 408 assert(m->is_method(), "not a Method*"); 409 return m; 410 } 411 412 void frame::interpreter_frame_set_method(Method* method) { 413 assert(is_interpreted_frame(), "interpreted frame expected"); 414 *interpreter_frame_method_addr() = method; 415 } 416 417 void frame::interpreter_frame_set_mirror(oop mirror) { 418 assert(is_interpreted_frame(), "interpreted frame expected"); 419 *interpreter_frame_mirror_addr() = mirror; 420 } 421 422 jint frame::interpreter_frame_bci() const { 423 assert(is_interpreted_frame(), "interpreted frame expected"); 424 address bcp = interpreter_frame_bcp(); 425 return interpreter_frame_method()->bci_from(bcp); 426 } 427 428 address frame::interpreter_frame_bcp() const { 429 assert(is_interpreted_frame(), "interpreted frame expected"); 430 address bcp = (address)*interpreter_frame_bcp_addr(); 431 return interpreter_frame_method()->bcp_from(bcp); 432 } 433 434 void frame::interpreter_frame_set_bcp(address bcp) { 435 assert(is_interpreted_frame(), "interpreted frame expected"); 436 *interpreter_frame_bcp_addr() = (intptr_t)bcp; 437 } 438 439 address frame::interpreter_frame_mdp() const { 440 assert(ProfileInterpreter, "must be profiling interpreter"); 441 assert(is_interpreted_frame(), "interpreted frame expected"); 442 return (address)*interpreter_frame_mdp_addr(); 443 } 444 445 void frame::interpreter_frame_set_mdp(address mdp) { 446 assert(is_interpreted_frame(), "interpreted frame expected"); 447 assert(ProfileInterpreter, "must be profiling interpreter"); 448 *interpreter_frame_mdp_addr() = (intptr_t)mdp; 449 } 450 451 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { 452 assert(is_interpreted_frame(), "Not an interpreted frame"); 453 #ifdef ASSERT 454 interpreter_frame_verify_monitor(current); 455 #endif 456 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); 457 return next; 458 } 459 460 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { 461 assert(is_interpreted_frame(), "Not an interpreted frame"); 462 #ifdef ASSERT 463 // // This verification needs to be checked before being enabled 464 // interpreter_frame_verify_monitor(current); 465 #endif 466 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); 467 return previous; 468 } 469 470 // Interpreter locals and expression stack locations. 471 472 intptr_t* frame::interpreter_frame_local_at(int index) const { 473 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; 474 intptr_t* first = interpreter_frame_locals(); 475 return &(first[n]); 476 } 477 478 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { 479 const int i = offset * interpreter_frame_expression_stack_direction(); 480 const int n = i * Interpreter::stackElementWords; 481 return &(interpreter_frame_expression_stack()[n]); 482 } 483 484 jint frame::interpreter_frame_expression_stack_size() const { 485 // Number of elements on the interpreter expression stack 486 // Callers should span by stackElementWords 487 int element_size = Interpreter::stackElementWords; 488 size_t stack_size = 0; 489 if (frame::interpreter_frame_expression_stack_direction() < 0) { 490 stack_size = (interpreter_frame_expression_stack() - 491 interpreter_frame_tos_address() + 1)/element_size; 492 } else { 493 stack_size = (interpreter_frame_tos_address() - 494 interpreter_frame_expression_stack() + 1)/element_size; 495 } 496 assert(stack_size <= (size_t)max_jint, "stack size too big"); 497 return (jint)stack_size; 498 } 499 500 501 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) 502 503 const char* frame::print_name() const { 504 if (is_native_frame()) return "Native"; 505 if (is_interpreted_frame()) return "Interpreted"; 506 if (is_compiled_frame()) { 507 if (is_deoptimized_frame()) return "Deoptimized"; 508 return "Compiled"; 509 } 510 if (sp() == nullptr) return "Empty"; 511 return "C"; 512 } 513 514 void frame::print_value_on(outputStream* st, JavaThread *thread) const { 515 NOT_PRODUCT(address begin = pc()-40;) 516 NOT_PRODUCT(address end = nullptr;) 517 518 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), p2i(sp()), p2i(unextended_sp())); 519 if (sp() != nullptr) 520 st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, 521 p2i(fp()), p2i(real_fp()), p2i(pc())); 522 st->print_cr(")"); 523 524 if (StubRoutines::contains(pc())) { 525 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 526 st->print("~Stub::%s", desc->name()); 527 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) 528 } else if (Interpreter::contains(pc())) { 529 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); 530 if (desc != nullptr) { 531 st->print("~"); 532 desc->print_on(st); 533 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) 534 } else { 535 st->print("~interpreter"); 536 } 537 } 538 539 #ifndef PRODUCT 540 if (_cb != nullptr) { 541 st->print(" "); 542 _cb->print_value_on(st); 543 if (end == nullptr) { 544 begin = _cb->code_begin(); 545 end = _cb->code_end(); 546 } 547 } 548 if (WizardMode && Verbose) Disassembler::decode(begin, end); 549 #endif 550 } 551 552 void frame::print_on(outputStream* st) const { 553 print_value_on(st,nullptr); 554 if (is_interpreted_frame()) { 555 interpreter_frame_print_on(st); 556 } 557 } 558 559 void frame::interpreter_frame_print_on(outputStream* st) const { 560 #ifndef PRODUCT 561 assert(is_interpreted_frame(), "Not an interpreted frame"); 562 jint i; 563 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { 564 intptr_t x = *interpreter_frame_local_at(i); 565 st->print(" - local [" INTPTR_FORMAT "]", x); 566 st->fill_to(23); 567 st->print_cr("; #%d", i); 568 } 569 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { 570 intptr_t x = *interpreter_frame_expression_stack_at(i); 571 st->print(" - stack [" INTPTR_FORMAT "]", x); 572 st->fill_to(23); 573 st->print_cr("; #%d", i); 574 } 575 // locks for synchronization 576 for (BasicObjectLock* current = interpreter_frame_monitor_end(); 577 current < interpreter_frame_monitor_begin(); 578 current = next_monitor_in_interpreter_frame(current)) { 579 st->print(" - obj [%s", current->obj() == nullptr ? "null" : ""); 580 if (current->obj() != nullptr) current->obj()->print_value_on(st); 581 st->print_cr("]"); 582 st->print(" - lock ["); 583 current->lock()->print_on(st, current->obj()); 584 st->print_cr("]"); 585 } 586 // monitor 587 st->print_cr(" - monitor[" INTPTR_FORMAT "]", p2i(interpreter_frame_monitor_begin())); 588 // bcp 589 st->print(" - bcp [" INTPTR_FORMAT "]", p2i(interpreter_frame_bcp())); 590 st->fill_to(23); 591 st->print_cr("; @%d", interpreter_frame_bci()); 592 // locals 593 st->print_cr(" - locals [" INTPTR_FORMAT "]", p2i(interpreter_frame_local_at(0))); 594 // method 595 st->print(" - method [" INTPTR_FORMAT "]", p2i(interpreter_frame_method())); 596 st->fill_to(23); 597 st->print("; "); 598 interpreter_frame_method()->print_name(st); 599 st->cr(); 600 #endif 601 } 602 603 // Print whether the frame is in the VM or OS indicating a HotSpot problem. 604 // Otherwise, it's likely a bug in the native library that the Java code calls, 605 // hopefully indicating where to submit bugs. 606 void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) { 607 // C/C++ frame 608 bool in_vm = os::address_is_in_vm(pc); 609 st->print(in_vm ? "V" : "C"); 610 611 int offset; 612 bool found; 613 614 if (buf == nullptr || buflen < 1) return; 615 // libname 616 buf[0] = '\0'; 617 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); 618 if (found && buf[0] != '\0') { 619 // skip directory names 620 const char *p1, *p2; 621 p1 = buf; 622 int len = (int)strlen(os::file_separator()); 623 while ((p2 = strstr(p1, os::file_separator())) != nullptr) p1 = p2 + len; 624 st->print(" [%s+0x%x]", p1, offset); 625 } else { 626 st->print(" " PTR_FORMAT, p2i(pc)); 627 } 628 629 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); 630 if (found) { 631 st->print(" %s+0x%x", buf, offset); 632 } 633 } 634 635 // frame::print_on_error() is called by fatal error handler. Notice that we may 636 // crash inside this function if stack frame is corrupted. The fatal error 637 // handler can catch and handle the crash. Here we assume the frame is valid. 638 // 639 // First letter indicates type of the frame: 640 // J: Java frame (compiled) 641 // j: Java frame (interpreted) 642 // V: VM frame (C/C++) 643 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.) 644 // C: C/C++ frame 645 // 646 // We don't need detailed frame type as that in frame::print_name(). "C" 647 // suggests the problem is in user lib; everything else is likely a VM bug. 648 649 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { 650 if (_cb != nullptr) { 651 if (Interpreter::contains(pc())) { 652 Method* m = this->interpreter_frame_method(); 653 if (m != nullptr) { 654 m->name_and_sig_as_C_string(buf, buflen); 655 st->print("j %s", buf); 656 st->print("+%d", this->interpreter_frame_bci()); 657 ModuleEntry* module = m->method_holder()->module(); 658 if (module->is_named()) { 659 module->name()->as_C_string(buf, buflen); 660 st->print(" %s", buf); 661 if (module->version() != nullptr) { 662 module->version()->as_C_string(buf, buflen); 663 st->print("@%s", buf); 664 } 665 } 666 } else { 667 st->print("j " PTR_FORMAT, p2i(pc())); 668 } 669 } else if (StubRoutines::contains(pc())) { 670 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 671 if (desc != nullptr) { 672 st->print("v ~StubRoutines::%s " PTR_FORMAT, desc->name(), p2i(pc())); 673 } else { 674 st->print("v ~StubRoutines::" PTR_FORMAT, p2i(pc())); 675 } 676 } else if (_cb->is_buffer_blob()) { 677 st->print("v ~BufferBlob::%s " PTR_FORMAT, ((BufferBlob *)_cb)->name(), p2i(pc())); 678 } else if (_cb->is_nmethod()) { 679 nmethod* nm = _cb->as_nmethod(); 680 Method* m = nm->method(); 681 if (m != nullptr) { 682 st->print("J %d%s", nm->compile_id(), (nm->is_osr_method() ? "%" : "")); 683 st->print(" %s", nm->compiler_name()); 684 m->name_and_sig_as_C_string(buf, buflen); 685 st->print(" %s", buf); 686 ModuleEntry* module = m->method_holder()->module(); 687 if (module->is_named()) { 688 module->name()->as_C_string(buf, buflen); 689 st->print(" %s", buf); 690 if (module->version() != nullptr) { 691 module->version()->as_C_string(buf, buflen); 692 st->print("@%s", buf); 693 } 694 } 695 st->print(" (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+" INTPTR_FORMAT "]", 696 m->code_size(), p2i(_pc), p2i(_cb->code_begin()), _pc - _cb->code_begin()); 697 #if INCLUDE_JVMCI 698 const char* jvmciName = nm->jvmci_name(); 699 if (jvmciName != nullptr) { 700 st->print(" (%s)", jvmciName); 701 } 702 #endif 703 } else { 704 st->print("J " PTR_FORMAT, p2i(pc())); 705 } 706 } else if (_cb->is_runtime_stub()) { 707 st->print("v ~RuntimeStub::%s " PTR_FORMAT, ((RuntimeStub *)_cb)->name(), p2i(pc())); 708 } else if (_cb->is_deoptimization_stub()) { 709 st->print("v ~DeoptimizationBlob " PTR_FORMAT, p2i(pc())); 710 } else if (_cb->is_exception_stub()) { 711 st->print("v ~ExceptionBlob " PTR_FORMAT, p2i(pc())); 712 } else if (_cb->is_safepoint_stub()) { 713 st->print("v ~SafepointBlob " PTR_FORMAT, p2i(pc())); 714 } else if (_cb->is_adapter_blob()) { 715 st->print("v ~AdapterBlob " PTR_FORMAT, p2i(pc())); 716 } else if (_cb->is_vtable_blob()) { 717 st->print("v ~VtableBlob " PTR_FORMAT, p2i(pc())); 718 } else if (_cb->is_method_handles_adapter_blob()) { 719 st->print("v ~MethodHandlesAdapterBlob " PTR_FORMAT, p2i(pc())); 720 } else if (_cb->is_uncommon_trap_stub()) { 721 st->print("v ~UncommonTrapBlob " PTR_FORMAT, p2i(pc())); 722 } else { 723 st->print("v blob " PTR_FORMAT, p2i(pc())); 724 } 725 } else { 726 print_C_frame(st, buf, buflen, pc()); 727 } 728 } 729 730 731 /* 732 The interpreter_frame_expression_stack_at method in the case of SPARC needs the 733 max_stack value of the method in order to compute the expression stack address. 734 It uses the Method* in order to get the max_stack value but during GC this 735 Method* value saved on the frame is changed by reverse_and_push and hence cannot 736 be used. So we save the max_stack value in the FrameClosure object and pass it 737 down to the interpreter_frame_expression_stack_at method 738 */ 739 class InterpreterFrameClosure : public OffsetClosure { 740 private: 741 const frame* _fr; 742 OopClosure* _f; 743 int _max_locals; 744 int _max_stack; 745 746 public: 747 InterpreterFrameClosure(const frame* fr, int max_locals, int max_stack, 748 OopClosure* f) { 749 _fr = fr; 750 _max_locals = max_locals; 751 _max_stack = max_stack; 752 _f = f; 753 } 754 755 void offset_do(int offset) { 756 oop* addr; 757 if (offset < _max_locals) { 758 addr = (oop*) _fr->interpreter_frame_local_at(offset); 759 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); 760 _f->do_oop(addr); 761 } else { 762 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); 763 // In case of exceptions, the expression stack is invalid and the esp will be reset to express 764 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). 765 bool in_stack; 766 if (frame::interpreter_frame_expression_stack_direction() > 0) { 767 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); 768 } else { 769 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); 770 } 771 if (in_stack) { 772 _f->do_oop(addr); 773 } 774 } 775 } 776 }; 777 778 779 class InterpretedArgumentOopFinder: public SignatureIterator { 780 private: 781 OopClosure* _f; // Closure to invoke 782 int _offset; // TOS-relative offset, decremented with each argument 783 bool _has_receiver; // true if the callee has a receiver 784 const frame* _fr; 785 786 friend class SignatureIterator; // so do_parameters_on can call do_type 787 void do_type(BasicType type) { 788 _offset -= parameter_type_word_count(type); 789 if (is_reference_type(type)) oop_offset_do(); 790 } 791 792 void oop_offset_do() { 793 oop* addr; 794 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); 795 _f->do_oop(addr); 796 } 797 798 public: 799 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, const frame* fr, OopClosure* f) : SignatureIterator(signature), _has_receiver(has_receiver) { 800 // compute size of arguments 801 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); 802 assert(!fr->is_interpreted_frame() || 803 args_size <= fr->interpreter_frame_expression_stack_size(), 804 "args cannot be on stack anymore"); 805 // initialize InterpretedArgumentOopFinder 806 _f = f; 807 _fr = fr; 808 _offset = args_size; 809 } 810 811 void oops_do() { 812 if (_has_receiver) { 813 --_offset; 814 oop_offset_do(); 815 } 816 do_parameters_on(this); 817 } 818 }; 819 820 821 // Entry frame has following form (n arguments) 822 // +-----------+ 823 // sp -> | last arg | 824 // +-----------+ 825 // : ::: : 826 // +-----------+ 827 // (sp+n)->| first arg| 828 // +-----------+ 829 830 831 832 // visits and GC's all the arguments in entry frame 833 class EntryFrameOopFinder: public SignatureIterator { 834 private: 835 bool _is_static; 836 int _offset; 837 const frame* _fr; 838 OopClosure* _f; 839 840 friend class SignatureIterator; // so do_parameters_on can call do_type 841 void do_type(BasicType type) { 842 // decrement offset before processing the type 843 _offset -= parameter_type_word_count(type); 844 assert (_offset >= 0, "illegal offset"); 845 if (is_reference_type(type)) oop_at_offset_do(_offset); 846 } 847 848 void oop_at_offset_do(int offset) { 849 assert (offset >= 0, "illegal offset"); 850 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); 851 _f->do_oop(addr); 852 } 853 854 public: 855 EntryFrameOopFinder(const frame* frame, Symbol* signature, bool is_static) : SignatureIterator(signature) { 856 _f = nullptr; // will be set later 857 _fr = frame; 858 _is_static = is_static; 859 _offset = ArgumentSizeComputer(signature).size(); // pre-decremented down to zero 860 } 861 862 void arguments_do(OopClosure* f) { 863 _f = f; 864 if (!_is_static) oop_at_offset_do(_offset); // do the receiver 865 do_parameters_on(this); 866 } 867 868 }; 869 870 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) { 871 ArgumentSizeComputer asc(signature); 872 int size = asc.size(); 873 return (oop *)interpreter_frame_tos_at(size); 874 } 875 876 oop frame::interpreter_callee_receiver(Symbol* signature) { 877 return *interpreter_callee_receiver_addr(signature); 878 } 879 880 void frame::oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache) const { 881 assert(is_interpreted_frame(), "Not an interpreted frame"); 882 Thread *thread = Thread::current(); 883 methodHandle m (thread, interpreter_frame_method()); 884 jint bci = interpreter_frame_bci(); 885 886 assert(!Universe::heap()->is_in(m()), 887 "must be valid oop"); 888 assert(m->is_method(), "checking frame value"); 889 assert((m->is_native() && bci == 0) || 890 (!m->is_native() && bci >= 0 && bci < m->code_size()), 891 "invalid bci value"); 892 893 // Handle the monitor elements in the activation 894 for ( 895 BasicObjectLock* current = interpreter_frame_monitor_end(); 896 current < interpreter_frame_monitor_begin(); 897 current = next_monitor_in_interpreter_frame(current) 898 ) { 899 #ifdef ASSERT 900 interpreter_frame_verify_monitor(current); 901 #endif 902 current->oops_do(f); 903 } 904 905 if (m->is_native()) { 906 f->do_oop(interpreter_frame_temp_oop_addr()); 907 } 908 909 // The method pointer in the frame might be the only path to the method's 910 // klass, and the klass needs to be kept alive while executing. The GCs 911 // don't trace through method pointers, so the mirror of the method's klass 912 // is installed as a GC root. 913 f->do_oop(interpreter_frame_mirror_addr()); 914 915 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 916 917 Symbol* signature = nullptr; 918 bool has_receiver = false; 919 920 // Process a callee's arguments if we are at a call site 921 // (i.e., if we are at an invoke bytecode) 922 // This is used sometimes for calling into the VM, not for another 923 // interpreted or compiled frame. 924 if (!m->is_native()) { 925 Bytecode_invoke call = Bytecode_invoke_check(m, bci); 926 if (map != nullptr && call.is_valid()) { 927 signature = call.signature(); 928 has_receiver = call.has_receiver(); 929 if (map->include_argument_oops() && 930 interpreter_frame_expression_stack_size() > 0) { 931 ResourceMark rm(thread); // is this right ??? 932 // we are at a call site & the expression stack is not empty 933 // => process callee's arguments 934 // 935 // Note: The expression stack can be empty if an exception 936 // occurred during method resolution/execution. In all 937 // cases we empty the expression stack completely be- 938 // fore handling the exception (the exception handling 939 // code in the interpreter calls a blocking runtime 940 // routine which can cause this code to be executed). 941 // (was bug gri 7/27/98) 942 oops_interpreted_arguments_do(signature, has_receiver, f); 943 } 944 } 945 } 946 947 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); 948 949 // process locals & expression stack 950 InterpreterOopMap mask; 951 if (query_oop_map_cache) { 952 m->mask_for(bci, &mask); 953 } else { 954 OopMapCache::compute_one_oop_map(m, bci, &mask); 955 } 956 mask.iterate_oop(&blk); 957 } 958 959 960 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) const { 961 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); 962 finder.oops_do(); 963 } 964 965 void frame::oops_nmethod_do(OopClosure* f, NMethodClosure* cf, DerivedOopClosure* df, DerivedPointerIterationMode derived_mode, const RegisterMap* reg_map) const { 966 assert(_cb != nullptr, "sanity check"); 967 assert((oop_map() == nullptr) == (_cb->oop_maps() == nullptr), "frame and _cb must agree that oopmap is set or not"); 968 if (oop_map() != nullptr) { 969 if (df != nullptr) { 970 _oop_map->oops_do(this, reg_map, f, df); 971 } else { 972 _oop_map->oops_do(this, reg_map, f, derived_mode); 973 } 974 975 // Preserve potential arguments for a callee. We handle this by dispatching 976 // on the codeblob. For c2i, we do 977 if (reg_map->include_argument_oops()) { 978 _cb->preserve_callee_argument_oops(*this, reg_map, f); 979 } 980 } 981 // In cases where perm gen is collected, GC will want to mark 982 // oops referenced from nmethods active on thread stacks so as to 983 // prevent them from being collected. However, this visit should be 984 // restricted to certain phases of the collection only. The 985 // closure decides how it wants nmethods to be traced. 986 if (cf != nullptr && _cb->is_nmethod()) 987 cf->do_nmethod(_cb->as_nmethod()); 988 } 989 990 class CompiledArgumentOopFinder: public SignatureIterator { 991 protected: 992 OopClosure* _f; 993 int _offset; // the current offset, incremented with each argument 994 bool _has_receiver; // true if the callee has a receiver 995 bool _has_appendix; // true if the call has an appendix 996 frame _fr; 997 RegisterMap* _reg_map; 998 int _arg_size; 999 VMRegPair* _regs; // VMReg list of arguments 1000 1001 friend class SignatureIterator; // so do_parameters_on can call do_type 1002 void do_type(BasicType type) { 1003 if (is_reference_type(type)) handle_oop_offset(); 1004 _offset += parameter_type_word_count(type); 1005 } 1006 1007 virtual void handle_oop_offset() { 1008 // Extract low order register number from register array. 1009 // In LP64-land, the high-order bits are valid but unhelpful. 1010 VMReg reg = _regs[_offset].first(); 1011 oop *loc = _fr.oopmapreg_to_oop_location(reg, _reg_map); 1012 #ifdef ASSERT 1013 if (loc == nullptr) { 1014 if (_reg_map->should_skip_missing()) { 1015 return; 1016 } 1017 tty->print_cr("Error walking frame oops:"); 1018 _fr.print_on(tty); 1019 assert(loc != nullptr, "missing register map entry reg: %d %s loc: " INTPTR_FORMAT, reg->value(), reg->name(), p2i(loc)); 1020 } 1021 #endif 1022 _f->do_oop(loc); 1023 } 1024 1025 public: 1026 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map) 1027 : SignatureIterator(signature) { 1028 1029 // initialize CompiledArgumentOopFinder 1030 _f = f; 1031 _offset = 0; 1032 _has_receiver = has_receiver; 1033 _has_appendix = has_appendix; 1034 _fr = fr; 1035 _reg_map = (RegisterMap*)reg_map; 1036 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0); 1037 1038 int arg_size; 1039 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size); 1040 assert(arg_size == _arg_size, "wrong arg size"); 1041 } 1042 1043 void oops_do() { 1044 if (_has_receiver) { 1045 handle_oop_offset(); 1046 _offset++; 1047 } 1048 do_parameters_on(this); 1049 if (_has_appendix) { 1050 handle_oop_offset(); 1051 _offset++; 1052 } 1053 } 1054 }; 1055 1056 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, 1057 const RegisterMap* reg_map, OopClosure* f) const { 1058 // ResourceMark rm; 1059 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map); 1060 finder.oops_do(); 1061 } 1062 1063 // Get receiver out of callers frame, i.e. find parameter 0 in callers 1064 // frame. Consult ADLC for where parameter 0 is to be found. Then 1065 // check local reg_map for it being a callee-save register or argument 1066 // register, both of which are saved in the local frame. If not found 1067 // there, it must be an in-stack argument of the caller. 1068 // Note: caller.sp() points to callee-arguments 1069 oop frame::retrieve_receiver(RegisterMap* reg_map) { 1070 frame caller = *this; 1071 1072 // First consult the ADLC on where it puts parameter 0 for this signature. 1073 VMReg reg = SharedRuntime::name_for_receiver(); 1074 oop* oop_adr = caller.oopmapreg_to_oop_location(reg, reg_map); 1075 if (oop_adr == nullptr) { 1076 guarantee(oop_adr != nullptr, "bad register save location"); 1077 return nullptr; 1078 } 1079 oop r = *oop_adr; 1080 assert(Universe::heap()->is_in_or_null(r), "bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", p2i(r), p2i(r)); 1081 return r; 1082 } 1083 1084 1085 BasicLock* frame::get_native_monitor() { 1086 nmethod* nm = (nmethod*)_cb; 1087 assert(_cb != nullptr && _cb->is_nmethod() && nm->method()->is_native(), 1088 "Should not call this unless it's a native nmethod"); 1089 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset()); 1090 assert(byte_offset >= 0, "should not see invalid offset"); 1091 return (BasicLock*) &sp()[byte_offset / wordSize]; 1092 } 1093 1094 oop frame::get_native_receiver() { 1095 nmethod* nm = (nmethod*)_cb; 1096 assert(_cb != nullptr && _cb->is_nmethod() && nm->method()->is_native(), 1097 "Should not call this unless it's a native nmethod"); 1098 int byte_offset = in_bytes(nm->native_receiver_sp_offset()); 1099 assert(byte_offset >= 0, "should not see invalid offset"); 1100 oop owner = ((oop*) sp())[byte_offset / wordSize]; 1101 assert( Universe::heap()->is_in(owner), "bad receiver" ); 1102 return owner; 1103 } 1104 1105 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) const { 1106 assert(map != nullptr, "map must be set"); 1107 if (map->include_argument_oops()) { 1108 // must collect argument oops, as nobody else is doing it 1109 Thread *thread = Thread::current(); 1110 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); 1111 EntryFrameOopFinder finder(this, m->signature(), m->is_static()); 1112 finder.arguments_do(f); 1113 } 1114 // Traverse the Handle Block saved in the entry frame 1115 entry_frame_call_wrapper()->oops_do(f); 1116 } 1117 1118 bool frame::is_deoptimized_frame() const { 1119 assert(_deopt_state != unknown, "not answerable"); 1120 if (_deopt_state == is_deoptimized) { 1121 return true; 1122 } 1123 1124 /* This method only checks if the frame is deoptimized 1125 * as in return address being patched. 1126 * It doesn't care if the OP that we return to is a 1127 * deopt instruction */ 1128 /*if (_cb != nullptr && _cb->is_nmethod()) { 1129 return NativeDeoptInstruction::is_deopt_at(_pc); 1130 }*/ 1131 return false; 1132 } 1133 1134 void frame::oops_do_internal(OopClosure* f, NMethodClosure* cf, 1135 DerivedOopClosure* df, DerivedPointerIterationMode derived_mode, 1136 const RegisterMap* map, bool use_interpreter_oop_map_cache) const { 1137 #ifndef PRODUCT 1138 // simulate GC crash here to dump java thread in error report 1139 if (CrashGCForDumpingJavaThread) { 1140 char *t = nullptr; 1141 *t = 'c'; 1142 } 1143 #endif 1144 if (is_interpreted_frame()) { 1145 oops_interpreted_do(f, map, use_interpreter_oop_map_cache); 1146 } else if (is_entry_frame()) { 1147 oops_entry_do(f, map); 1148 } else if (is_upcall_stub_frame()) { 1149 _cb->as_upcall_stub()->oops_do(f, *this); 1150 } else if (CodeCache::contains(pc())) { 1151 oops_nmethod_do(f, cf, df, derived_mode, map); 1152 } else { 1153 ShouldNotReachHere(); 1154 } 1155 } 1156 1157 void frame::nmethod_do(NMethodClosure* cf) const { 1158 if (_cb != nullptr && _cb->is_nmethod()) { 1159 cf->do_nmethod(_cb->as_nmethod()); 1160 } 1161 } 1162 1163 1164 // Call f closure on the interpreted Method*s in the stack. 1165 void frame::metadata_do(MetadataClosure* f) const { 1166 ResourceMark rm; 1167 if (is_interpreted_frame()) { 1168 Method* m = this->interpreter_frame_method(); 1169 assert(m != nullptr, "expecting a method in this frame"); 1170 f->do_metadata(m); 1171 } 1172 } 1173 1174 void frame::verify(const RegisterMap* map) const { 1175 #ifndef PRODUCT 1176 if (TraceCodeBlobStacks) { 1177 tty->print_cr("*** verify"); 1178 print_on(tty); 1179 } 1180 #endif 1181 1182 // for now make sure receiver type is correct 1183 if (is_interpreted_frame()) { 1184 Method* method = interpreter_frame_method(); 1185 guarantee(method->is_method(), "method is wrong in frame::verify"); 1186 if (!method->is_static()) { 1187 // fetch the receiver 1188 oop* p = (oop*) interpreter_frame_local_at(0); 1189 // make sure we have the right receiver type 1190 } 1191 } 1192 #if COMPILER2_OR_JVMCI 1193 assert(DerivedPointerTable::is_empty(), "must be empty before verify"); 1194 #endif 1195 1196 if (map->update_map()) { // The map has to be up-to-date for the current frame 1197 oops_do_internal(&VerifyOopClosure::verify_oop, nullptr, nullptr, DerivedPointerIterationMode::_ignore, map, false); 1198 } 1199 } 1200 1201 1202 #ifdef ASSERT 1203 bool frame::verify_return_pc(address x) { 1204 #ifdef TARGET_ARCH_aarch64 1205 if (!pauth_ptr_is_raw(x)) { 1206 return false; 1207 } 1208 #endif 1209 if (StubRoutines::returns_to_call_stub(x)) { 1210 return true; 1211 } 1212 if (CodeCache::contains(x)) { 1213 return true; 1214 } 1215 if (Interpreter::contains(x)) { 1216 return true; 1217 } 1218 return false; 1219 } 1220 #endif 1221 1222 #ifdef ASSERT 1223 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { 1224 assert(is_interpreted_frame(), "Not an interpreted frame"); 1225 // verify that the value is in the right part of the frame 1226 address low_mark = (address) interpreter_frame_monitor_end(); 1227 address high_mark = (address) interpreter_frame_monitor_begin(); 1228 address current = (address) value; 1229 1230 const int monitor_size = frame::interpreter_frame_monitor_size(); 1231 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); 1232 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); 1233 1234 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); 1235 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); 1236 } 1237 #endif 1238 1239 #ifndef PRODUCT 1240 1241 // Returns true iff the address p is readable and *(intptr_t*)p != errvalue 1242 extern "C" bool dbg_is_safe(const void* p, intptr_t errvalue); 1243 1244 class FrameValuesOopClosure: public OopClosure, public DerivedOopClosure { 1245 private: 1246 GrowableArray<oop*>* _oops; 1247 GrowableArray<narrowOop*>* _narrow_oops; 1248 GrowableArray<derived_base*>* _base; 1249 GrowableArray<derived_pointer*>* _derived; 1250 NoSafepointVerifier nsv; 1251 1252 public: 1253 FrameValuesOopClosure() { 1254 _oops = new (mtThread) GrowableArray<oop*>(100, mtThread); 1255 _narrow_oops = new (mtThread) GrowableArray<narrowOop*>(100, mtThread); 1256 _base = new (mtThread) GrowableArray<derived_base*>(100, mtThread); 1257 _derived = new (mtThread) GrowableArray<derived_pointer*>(100, mtThread); 1258 } 1259 ~FrameValuesOopClosure() { 1260 delete _oops; 1261 delete _narrow_oops; 1262 delete _base; 1263 delete _derived; 1264 } 1265 1266 virtual void do_oop(oop* p) override { _oops->push(p); } 1267 virtual void do_oop(narrowOop* p) override { _narrow_oops->push(p); } 1268 virtual void do_derived_oop(derived_base* base_loc, derived_pointer* derived_loc) override { 1269 _base->push(base_loc); 1270 _derived->push(derived_loc); 1271 } 1272 1273 bool is_good(oop* p) { 1274 return *p == nullptr || (dbg_is_safe(*p, -1) && dbg_is_safe((*p)->klass(), -1) && oopDesc::is_oop_or_null(*p)); 1275 } 1276 void describe(FrameValues& values, int frame_no) { 1277 for (int i = 0; i < _oops->length(); i++) { 1278 oop* p = _oops->at(i); 1279 values.describe(frame_no, (intptr_t*)p, err_msg("oop%s for #%d", is_good(p) ? "" : " (BAD)", frame_no)); 1280 } 1281 for (int i = 0; i < _narrow_oops->length(); i++) { 1282 narrowOop* p = _narrow_oops->at(i); 1283 // we can't check for bad compressed oops, as decoding them might crash 1284 values.describe(frame_no, (intptr_t*)p, err_msg("narrow oop for #%d", frame_no)); 1285 } 1286 assert(_base->length() == _derived->length(), "should be the same"); 1287 for (int i = 0; i < _base->length(); i++) { 1288 derived_base* base = _base->at(i); 1289 derived_pointer* derived = _derived->at(i); 1290 values.describe(frame_no, (intptr_t*)derived, err_msg("derived pointer (base: " INTPTR_FORMAT ") for #%d", p2i(base), frame_no)); 1291 } 1292 } 1293 }; 1294 1295 class FrameValuesOopMapClosure: public OopMapClosure { 1296 private: 1297 const frame* _fr; 1298 const RegisterMap* _reg_map; 1299 FrameValues& _values; 1300 int _frame_no; 1301 1302 public: 1303 FrameValuesOopMapClosure(const frame* fr, const RegisterMap* reg_map, FrameValues& values, int frame_no) 1304 : _fr(fr), _reg_map(reg_map), _values(values), _frame_no(frame_no) {} 1305 1306 virtual void do_value(VMReg reg, OopMapValue::oop_types type) override { 1307 intptr_t* p = (intptr_t*)_fr->oopmapreg_to_location(reg, _reg_map); 1308 if (p != nullptr && (((intptr_t)p & WordAlignmentMask) == 0)) { 1309 const char* type_name = nullptr; 1310 switch(type) { 1311 case OopMapValue::oop_value: type_name = "oop"; break; 1312 case OopMapValue::narrowoop_value: type_name = "narrow oop"; break; 1313 case OopMapValue::callee_saved_value: type_name = "callee-saved"; break; 1314 case OopMapValue::derived_oop_value: type_name = "derived"; break; 1315 // case OopMapValue::live_value: type_name = "live"; break; 1316 default: break; 1317 } 1318 if (type_name != nullptr) { 1319 _values.describe(_frame_no, p, err_msg("%s for #%d", type_name, _frame_no)); 1320 } 1321 } 1322 } 1323 }; 1324 1325 // callers need a ResourceMark because of name_and_sig_as_C_string() usage, 1326 // RA allocated string is returned to the caller 1327 void frame::describe(FrameValues& values, int frame_no, const RegisterMap* reg_map) { 1328 // boundaries: sp and the 'real' frame pointer 1329 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 0); 1330 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp() 1331 1332 // print frame info at the highest boundary 1333 intptr_t* info_address = MAX2(sp(), frame_pointer); 1334 1335 if (info_address != frame_pointer) { 1336 // print frame_pointer explicitly if not marked by the frame info 1337 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1); 1338 } 1339 1340 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) { 1341 // Label values common to most frames 1342 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no), 0); 1343 } 1344 1345 if (is_interpreted_frame()) { 1346 Method* m = interpreter_frame_method(); 1347 int bci = interpreter_frame_bci(); 1348 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); 1349 1350 // Label the method and current bci 1351 values.describe(-1, info_address, 1352 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 3); 1353 if (desc != nullptr) { 1354 values.describe(-1, info_address, err_msg("- %s codelet: %s", 1355 desc->bytecode() >= 0 ? Bytecodes::name(desc->bytecode()) : "", 1356 desc->description() != nullptr ? desc->description() : "?"), 2); 1357 } 1358 values.describe(-1, info_address, 1359 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 2); 1360 // return address will be emitted by caller in describe_pd 1361 // values.describe(frame_no, (intptr_t*)sender_pc_addr(), Continuation::is_return_barrier_entry(*sender_pc_addr()) ? "return address (return barrier)" : "return address"); 1362 1363 if (m->max_locals() > 0) { 1364 intptr_t* l0 = interpreter_frame_local_at(0); 1365 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1); 1366 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 2); 1367 // Report each local and mark as owned by this frame 1368 for (int l = 0; l < m->max_locals(); l++) { 1369 intptr_t* l0 = interpreter_frame_local_at(l); 1370 values.describe(frame_no, l0, err_msg("local %d", l), 1); 1371 } 1372 } 1373 1374 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) { 1375 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin"); 1376 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end"); 1377 } 1378 1379 // Compute the actual expression stack size 1380 InterpreterOopMap mask; 1381 OopMapCache::compute_one_oop_map(methodHandle(Thread::current(), m), bci, &mask); 1382 intptr_t* tos = nullptr; 1383 // Report each stack element and mark as owned by this frame 1384 for (int e = 0; e < mask.expression_stack_size(); e++) { 1385 tos = MAX2(tos, interpreter_frame_expression_stack_at(e)); 1386 values.describe(frame_no, interpreter_frame_expression_stack_at(e), 1387 err_msg("stack %d", e), 1); 1388 } 1389 if (tos != nullptr) { 1390 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 2); 1391 } 1392 1393 if (reg_map != nullptr) { 1394 FrameValuesOopClosure oopsFn; 1395 oops_do(&oopsFn, nullptr, &oopsFn, reg_map); 1396 oopsFn.describe(values, frame_no); 1397 } 1398 } else if (is_entry_frame()) { 1399 // For now just label the frame 1400 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2); 1401 } else if (cb()->is_nmethod()) { 1402 // For now just label the frame 1403 nmethod* nm = cb()->as_nmethod(); 1404 values.describe(-1, info_address, 1405 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method J %s%s", frame_no, 1406 p2i(nm), 1407 nm->method()->name_and_sig_as_C_string(), 1408 (_deopt_state == is_deoptimized) ? 1409 " (deoptimized)" : 1410 ((_deopt_state == unknown) ? " (state unknown)" : "")), 1411 3); 1412 1413 { // mark arguments (see nmethod::print_nmethod_labels) 1414 Method* m = nm->method(); 1415 1416 int stack_slot_offset = nm->frame_size() * wordSize; // offset, in bytes, to caller sp 1417 int sizeargs = m->size_of_parameters(); 1418 1419 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); 1420 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); 1421 { 1422 int sig_index = 0; 1423 if (!m->is_static()) { 1424 sig_bt[sig_index++] = T_OBJECT; // 'this' 1425 } 1426 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ss.next()) { 1427 BasicType t = ss.type(); 1428 assert(type2size[t] == 1 || type2size[t] == 2, "size is 1 or 2"); 1429 sig_bt[sig_index++] = t; 1430 if (type2size[t] == 2) { 1431 sig_bt[sig_index++] = T_VOID; 1432 } 1433 } 1434 assert(sig_index == sizeargs, ""); 1435 } 1436 int stack_arg_slots = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs); 1437 assert(stack_arg_slots == m->num_stack_arg_slots(false /* rounded */), ""); 1438 int out_preserve = SharedRuntime::out_preserve_stack_slots(); 1439 int sig_index = 0; 1440 int arg_index = (m->is_static() ? 0 : -1); 1441 for (SignatureStream ss(m->signature()); !ss.at_return_type(); ) { 1442 bool at_this = (arg_index == -1); 1443 bool at_old_sp = false; 1444 BasicType t = (at_this ? T_OBJECT : ss.type()); 1445 assert(t == sig_bt[sig_index], "sigs in sync"); 1446 VMReg fst = regs[sig_index].first(); 1447 if (fst->is_stack()) { 1448 assert(((int)fst->reg2stack()) >= 0, "reg2stack: %d", fst->reg2stack()); 1449 int offset = (fst->reg2stack() + out_preserve) * VMRegImpl::stack_slot_size + stack_slot_offset; 1450 intptr_t* stack_address = (intptr_t*)((address)unextended_sp() + offset); 1451 if (at_this) { 1452 values.describe(frame_no, stack_address, err_msg("this for #%d", frame_no), 1); 1453 } else { 1454 values.describe(frame_no, stack_address, err_msg("param %d %s for #%d", arg_index, type2name(t), frame_no), 1); 1455 } 1456 } 1457 sig_index += type2size[t]; 1458 arg_index += 1; 1459 if (!at_this) { 1460 ss.next(); 1461 } 1462 } 1463 } 1464 1465 if (reg_map != nullptr && is_java_frame()) { 1466 int scope_no = 0; 1467 for (ScopeDesc* scope = nm->scope_desc_at(pc()); scope != nullptr; scope = scope->sender(), scope_no++) { 1468 Method* m = scope->method(); 1469 int bci = scope->bci(); 1470 values.describe(-1, info_address, err_msg("- #%d scope %s @ %d", scope_no, m->name_and_sig_as_C_string(), bci), 2); 1471 1472 { // mark locals 1473 GrowableArray<ScopeValue*>* scvs = scope->locals(); 1474 int scvs_length = scvs != nullptr ? scvs->length() : 0; 1475 for (int i = 0; i < scvs_length; i++) { 1476 intptr_t* stack_address = (intptr_t*)StackValue::stack_value_address(this, reg_map, scvs->at(i)); 1477 if (stack_address != nullptr) { 1478 values.describe(frame_no, stack_address, err_msg("local %d for #%d (scope %d)", i, frame_no, scope_no), 1); 1479 } 1480 } 1481 } 1482 { // mark expression stack 1483 GrowableArray<ScopeValue*>* scvs = scope->expressions(); 1484 int scvs_length = scvs != nullptr ? scvs->length() : 0; 1485 for (int i = 0; i < scvs_length; i++) { 1486 intptr_t* stack_address = (intptr_t*)StackValue::stack_value_address(this, reg_map, scvs->at(i)); 1487 if (stack_address != nullptr) { 1488 values.describe(frame_no, stack_address, err_msg("stack %d for #%d (scope %d)", i, frame_no, scope_no), 1); 1489 } 1490 } 1491 } 1492 } 1493 1494 FrameValuesOopClosure oopsFn; 1495 oops_do(&oopsFn, nullptr, &oopsFn, reg_map); 1496 oopsFn.describe(values, frame_no); 1497 1498 if (oop_map() != nullptr) { 1499 FrameValuesOopMapClosure valuesFn(this, reg_map, values, frame_no); 1500 // also OopMapValue::live_value ?? 1501 oop_map()->all_type_do(this, OopMapValue::callee_saved_value, &valuesFn); 1502 } 1503 } 1504 1505 if (nm->method()->is_continuation_enter_intrinsic()) { 1506 ContinuationEntry* ce = Continuation::get_continuation_entry_for_entry_frame(reg_map->thread(), *this); // (ContinuationEntry*)unextended_sp(); 1507 ce->describe(values, frame_no); 1508 } 1509 } else if (is_native_frame()) { 1510 // For now just label the frame 1511 nmethod* nm = cb()->as_nmethod_or_null(); 1512 values.describe(-1, info_address, 1513 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no, 1514 p2i(nm), nm->method()->name_and_sig_as_C_string()), 2); 1515 } else { 1516 // provide default info if not handled before 1517 char *info = (char *) "special frame"; 1518 if ((_cb != nullptr) && 1519 (_cb->name() != nullptr)) { 1520 info = (char *)_cb->name(); 1521 } 1522 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2); 1523 } 1524 1525 // platform dependent additional data 1526 describe_pd(values, frame_no); 1527 } 1528 1529 #endif 1530 1531 #ifndef PRODUCT 1532 1533 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) { 1534 FrameValue fv; 1535 fv.location = location; 1536 fv.owner = owner; 1537 fv.priority = priority; 1538 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1); 1539 strcpy(fv.description, description); 1540 _values.append(fv); 1541 } 1542 1543 1544 #ifdef ASSERT 1545 void FrameValues::validate() { 1546 _values.sort(compare); 1547 bool error = false; 1548 FrameValue prev; 1549 prev.owner = -1; 1550 for (int i = _values.length() - 1; i >= 0; i--) { 1551 FrameValue fv = _values.at(i); 1552 if (fv.owner == -1) continue; 1553 if (prev.owner == -1) { 1554 prev = fv; 1555 continue; 1556 } 1557 if (prev.location == fv.location) { 1558 if (fv.owner != prev.owner) { 1559 tty->print_cr("overlapping storage"); 1560 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", p2i(prev.location), *prev.location, prev.description); 1561 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", p2i(fv.location), *fv.location, fv.description); 1562 error = true; 1563 } 1564 } else { 1565 prev = fv; 1566 } 1567 } 1568 // if (error) { tty->cr(); print_on(static_cast<JavaThread*>(nullptr), tty); } 1569 assert(!error, "invalid layout"); 1570 } 1571 #endif // ASSERT 1572 1573 void FrameValues::print_on(JavaThread* thread, outputStream* st) { 1574 _values.sort(compare); 1575 1576 // Sometimes values like the fp can be invalid values if the 1577 // register map wasn't updated during the walk. Trim out values 1578 // that aren't actually in the stack of the thread. 1579 int min_index = 0; 1580 int max_index = _values.length() - 1; 1581 intptr_t* v0 = _values.at(min_index).location; 1582 intptr_t* v1 = _values.at(max_index).location; 1583 1584 if (thread != nullptr) { 1585 if (thread == Thread::current()) { 1586 while (!thread->is_in_live_stack((address)v0)) v0 = _values.at(++min_index).location; 1587 while (!thread->is_in_live_stack((address)v1)) v1 = _values.at(--max_index).location; 1588 } else { 1589 while (!thread->is_in_full_stack((address)v0)) v0 = _values.at(++min_index).location; 1590 while (!thread->is_in_full_stack((address)v1)) v1 = _values.at(--max_index).location; 1591 } 1592 } 1593 1594 print_on(st, min_index, max_index, v0, v1); 1595 } 1596 1597 void FrameValues::print_on(stackChunkOop chunk, outputStream* st) { 1598 _values.sort(compare); 1599 1600 intptr_t* start = chunk->start_address(); 1601 intptr_t* end = chunk->end_address() + 1; 1602 1603 int min_index = 0; 1604 int max_index = _values.length() - 1; 1605 intptr_t* v0 = _values.at(min_index).location; 1606 intptr_t* v1 = _values.at(max_index).location; 1607 while (!(start <= v0 && v0 <= end)) v0 = _values.at(++min_index).location; 1608 while (!(start <= v1 && v1 <= end)) v1 = _values.at(--max_index).location; 1609 1610 print_on(st, min_index, max_index, v0, v1); 1611 } 1612 1613 void FrameValues::print_on(outputStream* st, int min_index, int max_index, intptr_t* v0, intptr_t* v1) { 1614 intptr_t* min = MIN2(v0, v1); 1615 intptr_t* max = MAX2(v0, v1); 1616 intptr_t* cur = max; 1617 intptr_t* last = nullptr; 1618 intptr_t* fp = nullptr; 1619 for (int i = max_index; i >= min_index; i--) { 1620 FrameValue fv = _values.at(i); 1621 while (cur > fv.location) { 1622 st->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, p2i(cur), *cur); 1623 cur--; 1624 } 1625 if (last == fv.location) { 1626 const char* spacer = " " LP64_ONLY(" "); 1627 st->print_cr(" %s %s %s", spacer, spacer, fv.description); 1628 } else { 1629 if (*fv.description == '#' && isdigit(fv.description[1])) { 1630 // The fv.description string starting with a '#' is the line for the 1631 // saved frame pointer eg. "#10 method java.lang.invoke.LambdaForm..." 1632 // basicaly means frame 10. 1633 fp = fv.location; 1634 } 1635 // To print a fp-relative value: 1636 // 1. The content of *fv.location must be such that we think it's a 1637 // fp-relative number, i.e [-100..100]. 1638 // 2. We must have found the frame pointer. 1639 // 3. The line can not be the line for the saved frame pointer. 1640 // 4. Recognize it as being part of the "fixed frame". 1641 if (*fv.location != 0 && *fv.location > -100 && *fv.location < 100 1642 && fp != nullptr && *fv.description != '#' 1643 #if !defined(PPC64) 1644 && (strncmp(fv.description, "interpreter_frame_", 18) == 0 || strstr(fv.description, " method ")) 1645 #else // !defined(PPC64) 1646 && (strcmp(fv.description, "sender_sp") == 0 || strcmp(fv.description, "top_frame_sp") == 0 || 1647 strcmp(fv.description, "esp") == 0 || strcmp(fv.description, "monitors") == 0 || 1648 strcmp(fv.description, "locals") == 0 || strstr(fv.description, " method ")) 1649 #endif //!defined(PPC64) 1650 ) { 1651 st->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %-32s (relativized: fp%+d)", 1652 p2i(fv.location), p2i(&fp[*fv.location]), fv.description, (int)*fv.location); 1653 } else { 1654 st->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", p2i(fv.location), *fv.location, fv.description); 1655 } 1656 last = fv.location; 1657 cur--; 1658 } 1659 } 1660 } 1661 1662 #endif // ndef PRODUCT