1 /* 2 * Copyright (c) 1997, 2016, 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 "code/codeCache.hpp" 27 #include "code/vmreg.inline.hpp" 28 #include "compiler/abstractCompiler.hpp" 29 #include "compiler/disassembler.hpp" 30 #include "gc/shared/collectedHeap.inline.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "interpreter/oopMapCache.hpp" 33 #include "memory/resourceArea.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/markOop.hpp" 36 #include "oops/method.hpp" 37 #include "oops/methodData.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "oops/verifyOopClosure.hpp" 40 #include "prims/methodHandles.hpp" 41 #include "runtime/frame.inline.hpp" 42 #include "runtime/handles.inline.hpp" 43 #include "runtime/javaCalls.hpp" 44 #include "runtime/monitorChunk.hpp" 45 #include "runtime/os.hpp" 46 #include "runtime/sharedRuntime.hpp" 47 #include "runtime/signature.hpp" 48 #include "runtime/stubCodeGenerator.hpp" 49 #include "runtime/stubRoutines.hpp" 50 #include "runtime/thread.inline.hpp" 51 #include "utilities/decoder.hpp" 52 53 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) { 54 _thread = thread; 55 _update_map = update_map; 56 clear(); 57 debug_only(_update_for_id = NULL;) 58 #ifndef PRODUCT 59 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL; 60 #endif /* PRODUCT */ 61 } 62 63 RegisterMap::RegisterMap(const RegisterMap* map) { 64 assert(map != this, "bad initialization parameter"); 65 assert(map != NULL, "RegisterMap must be present"); 66 _thread = map->thread(); 67 _update_map = map->update_map(); 68 _include_argument_oops = map->include_argument_oops(); 69 debug_only(_update_for_id = map->_update_for_id;) 70 pd_initialize_from(map); 71 if (update_map()) { 72 for(int i = 0; i < location_valid_size; i++) { 73 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i]; 74 _location_valid[i] = bits; 75 // for whichever bits are set, pull in the corresponding map->_location 76 int j = i*location_valid_type_size; 77 while (bits != 0) { 78 if ((bits & 1) != 0) { 79 assert(0 <= j && j < reg_count, "range check"); 80 _location[j] = map->_location[j]; 81 } 82 bits >>= 1; 83 j += 1; 84 } 85 } 86 } 87 } 88 89 void RegisterMap::clear() { 90 set_include_argument_oops(true); 91 if (_update_map) { 92 for(int i = 0; i < location_valid_size; i++) { 93 _location_valid[i] = 0; 94 } 95 pd_clear(); 96 } else { 97 pd_initialize(); 98 } 99 } 100 101 #ifndef PRODUCT 102 103 void RegisterMap::print_on(outputStream* st) const { 104 st->print_cr("Register map"); 105 for(int i = 0; i < reg_count; i++) { 106 107 VMReg r = VMRegImpl::as_VMReg(i); 108 intptr_t* src = (intptr_t*) location(r); 109 if (src != NULL) { 110 111 r->print_on(st); 112 st->print(" [" INTPTR_FORMAT "] = ", p2i(src)); 113 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { 114 st->print_cr("<misaligned>"); 115 } else { 116 st->print_cr(INTPTR_FORMAT, *src); 117 } 118 } 119 } 120 } 121 122 void RegisterMap::print() const { 123 print_on(tty); 124 } 125 126 #endif 127 // This returns the pc that if you were in the debugger you'd see. Not 128 // the idealized value in the frame object. This undoes the magic conversion 129 // that happens for deoptimized frames. In addition it makes the value the 130 // hardware would want to see in the native frame. The only user (at this point) 131 // is deoptimization. It likely no one else should ever use it. 132 133 address frame::raw_pc() const { 134 if (is_deoptimized_frame()) { 135 CompiledMethod* cm = cb()->as_compiled_method_or_null(); 136 if (cm->is_method_handle_return(pc())) 137 return cm->deopt_mh_handler_begin() - pc_return_offset; 138 else 139 return cm->deopt_handler_begin() - pc_return_offset; 140 } else { 141 return (pc() - pc_return_offset); 142 } 143 } 144 145 // Change the pc in a frame object. This does not change the actual pc in 146 // actual frame. To do that use patch_pc. 147 // 148 void frame::set_pc(address newpc ) { 149 #ifdef ASSERT 150 if (_cb != NULL && _cb->is_nmethod()) { 151 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); 152 } 153 #endif // ASSERT 154 155 // Unsafe to use the is_deoptimzed tester after changing pc 156 _deopt_state = unknown; 157 _pc = newpc; 158 _cb = CodeCache::find_blob_unsafe(_pc); 159 160 } 161 162 // type testers 163 bool frame::is_ignored_frame() const { 164 return false; // FIXME: some LambdaForm frames should be ignored 165 } 166 bool frame::is_deoptimized_frame() const { 167 assert(_deopt_state != unknown, "not answerable"); 168 return _deopt_state == is_deoptimized; 169 } 170 171 bool frame::is_native_frame() const { 172 return (_cb != NULL && 173 _cb->is_nmethod() && 174 ((nmethod*)_cb)->is_native_method()); 175 } 176 177 bool frame::is_java_frame() const { 178 if (is_interpreted_frame()) return true; 179 if (is_compiled_frame()) return true; 180 return false; 181 } 182 183 184 bool frame::is_compiled_frame() const { 185 if (_cb != NULL && 186 _cb->is_compiled() && 187 ((CompiledMethod*)_cb)->is_java_method()) { 188 return true; 189 } 190 return false; 191 } 192 193 194 bool frame::is_runtime_frame() const { 195 return (_cb != NULL && _cb->is_runtime_stub()); 196 } 197 198 bool frame::is_safepoint_blob_frame() const { 199 return (_cb != NULL && _cb->is_safepoint_stub()); 200 } 201 202 // testers 203 204 bool frame::is_first_java_frame() const { 205 RegisterMap map(JavaThread::current(), false); // No update 206 frame s; 207 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); 208 return s.is_first_frame(); 209 } 210 211 212 bool frame::entry_frame_is_first() const { 213 return entry_frame_call_wrapper()->is_first_frame(); 214 } 215 216 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const { 217 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr(); 218 address addr = (address) jcw; 219 220 // addr must be within the usable part of the stack 221 if (thread->is_in_usable_stack(addr)) { 222 return *jcw; 223 } 224 225 return NULL; 226 } 227 228 bool frame::is_entry_frame_valid(JavaThread* thread) const { 229 // Validate the JavaCallWrapper an entry frame must have 230 address jcw = (address)entry_frame_call_wrapper(); 231 bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)fp()); // less than stack base 232 if (!jcw_safe) { 233 return false; 234 } 235 236 // Validate sp saved in the java frame anchor 237 JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); 238 return (jfa->last_Java_sp() > sp()); 239 } 240 241 bool frame::should_be_deoptimized() const { 242 if (_deopt_state == is_deoptimized || 243 !is_compiled_frame() ) return false; 244 assert(_cb != NULL && _cb->is_compiled(), "must be an nmethod"); 245 CompiledMethod* nm = (CompiledMethod *)_cb; 246 if (TraceDependencies) { 247 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); 248 nm->print_value_on(tty); 249 tty->cr(); 250 } 251 252 if( !nm->is_marked_for_deoptimization() ) 253 return false; 254 255 // If at the return point, then the frame has already been popped, and 256 // only the return needs to be executed. Don't deoptimize here. 257 return !nm->is_at_poll_return(pc()); 258 } 259 260 bool frame::can_be_deoptimized() const { 261 if (!is_compiled_frame()) return false; 262 CompiledMethod* nm = (CompiledMethod*)_cb; 263 264 if( !nm->can_be_deoptimized() ) 265 return false; 266 267 return !nm->is_at_poll_return(pc()); 268 } 269 270 void frame::deoptimize(JavaThread* thread) { 271 // Schedule deoptimization of an nmethod activation with this frame. 272 assert(_cb != NULL && _cb->is_compiled(), "must be"); 273 274 // This is a fix for register window patching race 275 if (NeedsDeoptSuspend && Thread::current() != thread) { 276 assert(SafepointSynchronize::is_at_safepoint(), 277 "patching other threads for deopt may only occur at a safepoint"); 278 279 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that 280 // we could see the frame again and ask for it to be deoptimized since 281 // it might move for a long time. That is harmless and we just ignore it. 282 if (id() == thread->must_deopt_id()) { 283 assert(thread->is_deopt_suspend(), "lost suspension"); 284 return; 285 } 286 287 // We are at a safepoint so the target thread can only be 288 // in 4 states: 289 // blocked - no problem 290 // blocked_trans - no problem (i.e. could have woken up from blocked 291 // during a safepoint). 292 // native - register window pc patching race 293 // native_trans - momentary state 294 // 295 // We could just wait out a thread in native_trans to block. 296 // Then we'd have all the issues that the safepoint code has as to 297 // whether to spin or block. It isn't worth it. Just treat it like 298 // native and be done with it. 299 // 300 // Examine the state of the thread at the start of safepoint since 301 // threads that were in native at the start of the safepoint could 302 // come to a halt during the safepoint, changing the current value 303 // of the safepoint_state. 304 JavaThreadState state = thread->safepoint_state()->orig_thread_state(); 305 if (state == _thread_in_native || state == _thread_in_native_trans) { 306 // Since we are at a safepoint the target thread will stop itself 307 // before it can return to java as long as we remain at the safepoint. 308 // Therefore we can put an additional request for the thread to stop 309 // no matter what no (like a suspend). This will cause the thread 310 // to notice it needs to do the deopt on its own once it leaves native. 311 // 312 // The only reason we must do this is because on machine with register 313 // windows we have a race with patching the return address and the 314 // window coming live as the thread returns to the Java code (but still 315 // in native mode) and then blocks. It is only this top most frame 316 // that is at risk. So in truth we could add an additional check to 317 // see if this frame is one that is at risk. 318 RegisterMap map(thread, false); 319 frame at_risk = thread->last_frame().sender(&map); 320 if (id() == at_risk.id()) { 321 thread->set_must_deopt_id(id()); 322 thread->set_deopt_suspend(); 323 return; 324 } 325 } 326 } // NeedsDeoptSuspend 327 328 329 // If the call site is a MethodHandle call site use the MH deopt 330 // handler. 331 CompiledMethod* cm = (CompiledMethod*) _cb; 332 address deopt = cm->is_method_handle_return(pc()) ? 333 cm->deopt_mh_handler_begin() : 334 cm->deopt_handler_begin(); 335 336 // Save the original pc before we patch in the new one 337 cm->set_original_pc(this, pc()); 338 patch_pc(thread, deopt); 339 340 #ifdef ASSERT 341 { 342 RegisterMap map(thread, false); 343 frame check = thread->last_frame(); 344 while (id() != check.id()) { 345 check = check.sender(&map); 346 } 347 assert(check.is_deoptimized_frame(), "missed deopt"); 348 } 349 #endif // ASSERT 350 } 351 352 frame frame::java_sender() const { 353 RegisterMap map(JavaThread::current(), false); 354 frame s; 355 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; 356 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); 357 return s; 358 } 359 360 frame frame::real_sender(RegisterMap* map) const { 361 frame result = sender(map); 362 while (result.is_runtime_frame() || 363 result.is_ignored_frame()) { 364 result = result.sender(map); 365 } 366 return result; 367 } 368 369 // Note: called by profiler - NOT for current thread 370 frame frame::profile_find_Java_sender_frame(JavaThread *thread) { 371 // If we don't recognize this frame, walk back up the stack until we do 372 RegisterMap map(thread, false); 373 frame first_java_frame = frame(); 374 375 // Find the first Java frame on the stack starting with input frame 376 if (is_java_frame()) { 377 // top frame is compiled frame or deoptimized frame 378 first_java_frame = *this; 379 } else if (safe_for_sender(thread)) { 380 for (frame sender_frame = sender(&map); 381 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame(); 382 sender_frame = sender_frame.sender(&map)) { 383 if (sender_frame.is_java_frame()) { 384 first_java_frame = sender_frame; 385 break; 386 } 387 } 388 } 389 return first_java_frame; 390 } 391 392 // Interpreter frames 393 394 395 void frame::interpreter_frame_set_locals(intptr_t* locs) { 396 assert(is_interpreted_frame(), "Not an interpreted frame"); 397 *interpreter_frame_locals_addr() = locs; 398 } 399 400 Method* frame::interpreter_frame_method() const { 401 assert(is_interpreted_frame(), "interpreted frame expected"); 402 Method* m = *interpreter_frame_method_addr(); 403 assert(m->is_method(), "not a Method*"); 404 return m; 405 } 406 407 void frame::interpreter_frame_set_method(Method* method) { 408 assert(is_interpreted_frame(), "interpreted frame expected"); 409 *interpreter_frame_method_addr() = method; 410 } 411 412 void frame::interpreter_frame_set_mirror(oop mirror) { 413 assert(is_interpreted_frame(), "interpreted frame expected"); 414 *interpreter_frame_mirror_addr() = mirror; 415 } 416 417 jint frame::interpreter_frame_bci() const { 418 assert(is_interpreted_frame(), "interpreted frame expected"); 419 address bcp = interpreter_frame_bcp(); 420 return interpreter_frame_method()->bci_from(bcp); 421 } 422 423 address frame::interpreter_frame_bcp() const { 424 assert(is_interpreted_frame(), "interpreted frame expected"); 425 address bcp = (address)*interpreter_frame_bcp_addr(); 426 return interpreter_frame_method()->bcp_from(bcp); 427 } 428 429 void frame::interpreter_frame_set_bcp(address bcp) { 430 assert(is_interpreted_frame(), "interpreted frame expected"); 431 *interpreter_frame_bcp_addr() = (intptr_t)bcp; 432 } 433 434 address frame::interpreter_frame_mdp() const { 435 assert(ProfileInterpreter, "must be profiling interpreter"); 436 assert(is_interpreted_frame(), "interpreted frame expected"); 437 return (address)*interpreter_frame_mdp_addr(); 438 } 439 440 void frame::interpreter_frame_set_mdp(address mdp) { 441 assert(is_interpreted_frame(), "interpreted frame expected"); 442 assert(ProfileInterpreter, "must be profiling interpreter"); 443 *interpreter_frame_mdp_addr() = (intptr_t)mdp; 444 } 445 446 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { 447 assert(is_interpreted_frame(), "Not an interpreted frame"); 448 #ifdef ASSERT 449 interpreter_frame_verify_monitor(current); 450 #endif 451 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); 452 return next; 453 } 454 455 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { 456 assert(is_interpreted_frame(), "Not an interpreted frame"); 457 #ifdef ASSERT 458 // // This verification needs to be checked before being enabled 459 // interpreter_frame_verify_monitor(current); 460 #endif 461 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); 462 return previous; 463 } 464 465 // Interpreter locals and expression stack locations. 466 467 intptr_t* frame::interpreter_frame_local_at(int index) const { 468 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; 469 return &((*interpreter_frame_locals_addr())[n]); 470 } 471 472 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { 473 const int i = offset * interpreter_frame_expression_stack_direction(); 474 const int n = i * Interpreter::stackElementWords; 475 return &(interpreter_frame_expression_stack()[n]); 476 } 477 478 jint frame::interpreter_frame_expression_stack_size() const { 479 // Number of elements on the interpreter expression stack 480 // Callers should span by stackElementWords 481 int element_size = Interpreter::stackElementWords; 482 size_t stack_size = 0; 483 if (frame::interpreter_frame_expression_stack_direction() < 0) { 484 stack_size = (interpreter_frame_expression_stack() - 485 interpreter_frame_tos_address() + 1)/element_size; 486 } else { 487 stack_size = (interpreter_frame_tos_address() - 488 interpreter_frame_expression_stack() + 1)/element_size; 489 } 490 assert( stack_size <= (size_t)max_jint, "stack size too big"); 491 return ((jint)stack_size); 492 } 493 494 495 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) 496 497 const char* frame::print_name() const { 498 if (is_native_frame()) return "Native"; 499 if (is_interpreted_frame()) return "Interpreted"; 500 if (is_compiled_frame()) { 501 if (is_deoptimized_frame()) return "Deoptimized"; 502 return "Compiled"; 503 } 504 if (sp() == NULL) return "Empty"; 505 return "C"; 506 } 507 508 void frame::print_value_on(outputStream* st, JavaThread *thread) const { 509 NOT_PRODUCT(address begin = pc()-40;) 510 NOT_PRODUCT(address end = NULL;) 511 512 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), p2i(sp()), p2i(unextended_sp())); 513 if (sp() != NULL) 514 st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, 515 p2i(fp()), p2i(real_fp()), p2i(pc())); 516 517 if (StubRoutines::contains(pc())) { 518 st->print_cr(")"); 519 st->print("("); 520 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 521 st->print("~Stub::%s", desc->name()); 522 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) 523 } else if (Interpreter::contains(pc())) { 524 st->print_cr(")"); 525 st->print("("); 526 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); 527 if (desc != NULL) { 528 st->print("~"); 529 desc->print_on(st); 530 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) 531 } else { 532 st->print("~interpreter"); 533 } 534 } 535 st->print_cr(")"); 536 537 if (_cb != NULL) { 538 st->print(" "); 539 _cb->print_value_on(st); 540 st->cr(); 541 #ifndef PRODUCT 542 if (end == NULL) { 543 begin = _cb->code_begin(); 544 end = _cb->code_end(); 545 } 546 #endif 547 } 548 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);) 549 } 550 551 552 void frame::print_on(outputStream* st) const { 553 print_value_on(st,NULL); 554 if (is_interpreted_frame()) { 555 interpreter_frame_print_on(st); 556 } 557 } 558 559 560 void frame::interpreter_frame_print_on(outputStream* st) const { 561 #ifndef PRODUCT 562 assert(is_interpreted_frame(), "Not an interpreted frame"); 563 jint i; 564 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { 565 intptr_t x = *interpreter_frame_local_at(i); 566 st->print(" - local [" INTPTR_FORMAT "]", x); 567 st->fill_to(23); 568 st->print_cr("; #%d", i); 569 } 570 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { 571 intptr_t x = *interpreter_frame_expression_stack_at(i); 572 st->print(" - stack [" INTPTR_FORMAT "]", x); 573 st->fill_to(23); 574 st->print_cr("; #%d", i); 575 } 576 // locks for synchronization 577 for (BasicObjectLock* current = interpreter_frame_monitor_end(); 578 current < interpreter_frame_monitor_begin(); 579 current = next_monitor_in_interpreter_frame(current)) { 580 st->print(" - obj ["); 581 current->obj()->print_value_on(st); 582 st->print_cr("]"); 583 st->print(" - lock ["); 584 current->lock()->print_on(st); 585 st->print_cr("]"); 586 } 587 // monitor 588 st->print_cr(" - monitor[" INTPTR_FORMAT "]", p2i(interpreter_frame_monitor_begin())); 589 // bcp 590 st->print(" - bcp [" INTPTR_FORMAT "]", p2i(interpreter_frame_bcp())); 591 st->fill_to(23); 592 st->print_cr("; @%d", interpreter_frame_bci()); 593 // locals 594 st->print_cr(" - locals [" INTPTR_FORMAT "]", p2i(interpreter_frame_local_at(0))); 595 // method 596 st->print(" - method [" INTPTR_FORMAT "]", p2i(interpreter_frame_method())); 597 st->fill_to(23); 598 st->print("; "); 599 interpreter_frame_method()->print_name(st); 600 st->cr(); 601 #endif 602 } 603 604 // Print whether the frame is in the VM or OS indicating a HotSpot problem. 605 // Otherwise, it's likely a bug in the native library that the Java code calls, 606 // hopefully indicating where to submit bugs. 607 void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) { 608 // C/C++ frame 609 bool in_vm = os::address_is_in_vm(pc); 610 st->print(in_vm ? "V" : "C"); 611 612 int offset; 613 bool found; 614 615 // libname 616 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); 617 if (found) { 618 // skip directory names 619 const char *p1, *p2; 620 p1 = buf; 621 int len = (int)strlen(os::file_separator()); 622 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 623 st->print(" [%s+0x%x]", p1, offset); 624 } else { 625 st->print(" " PTR_FORMAT, p2i(pc)); 626 } 627 628 // function name - os::dll_address_to_function_name() may return confusing 629 // names if pc is within jvm.dll or libjvm.so, because JVM only has 630 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this 631 // only for native libraries. 632 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) { 633 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); 634 635 if (found) { 636 st->print(" %s+0x%x", buf, offset); 637 } 638 } 639 } 640 641 // frame::print_on_error() is called by fatal error handler. Notice that we may 642 // crash inside this function if stack frame is corrupted. The fatal error 643 // handler can catch and handle the crash. Here we assume the frame is valid. 644 // 645 // First letter indicates type of the frame: 646 // J: Java frame (compiled) 647 // j: Java frame (interpreted) 648 // V: VM frame (C/C++) 649 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.) 650 // C: C/C++ frame 651 // 652 // We don't need detailed frame type as that in frame::print_name(). "C" 653 // suggests the problem is in user lib; everything else is likely a VM bug. 654 655 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { 656 if (_cb != NULL) { 657 if (Interpreter::contains(pc())) { 658 Method* m = this->interpreter_frame_method(); 659 if (m != NULL) { 660 m->name_and_sig_as_C_string(buf, buflen); 661 st->print("j %s", buf); 662 st->print("+%d", this->interpreter_frame_bci()); 663 ModuleEntry* module = m->method_holder()->module(); 664 if (module->is_named()) { 665 module->name()->as_C_string(buf, buflen); 666 st->print(" %s", buf); 667 if (module->version() != NULL) { 668 module->version()->as_C_string(buf, buflen); 669 st->print("@%s", buf); 670 } 671 } 672 } else { 673 st->print("j " PTR_FORMAT, p2i(pc())); 674 } 675 } else if (StubRoutines::contains(pc())) { 676 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 677 if (desc != NULL) { 678 st->print("v ~StubRoutines::%s", desc->name()); 679 } else { 680 st->print("v ~StubRoutines::" PTR_FORMAT, p2i(pc())); 681 } 682 } else if (_cb->is_buffer_blob()) { 683 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name()); 684 } else if (_cb->is_compiled()) { 685 CompiledMethod* cm = (CompiledMethod*)_cb; 686 Method* m = cm->method(); 687 if (m != NULL) { 688 if (cm->is_nmethod()) { 689 nmethod* nm = cm->as_nmethod(); 690 st->print("J %d%s", nm->compile_id(), (nm->is_osr_method() ? "%" : "")); 691 st->print(" %s", nm->compiler_name()); 692 } 693 m->name_and_sig_as_C_string(buf, buflen); 694 st->print(" %s", buf); 695 ModuleEntry* module = m->method_holder()->module(); 696 if (module->is_named()) { 697 module->name()->as_C_string(buf, buflen); 698 st->print(" %s", buf); 699 if (module->version() != NULL) { 700 module->version()->as_C_string(buf, buflen); 701 st->print("@%s", buf); 702 } 703 } 704 st->print(" (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+" INTPTR_FORMAT "]", 705 m->code_size(), p2i(_pc), p2i(_cb->code_begin()), _pc - _cb->code_begin()); 706 #if INCLUDE_JVMCI 707 if (cm->is_nmethod()) { 708 nmethod* nm = cm->as_nmethod(); 709 char* jvmciName = nm->jvmci_installed_code_name(buf, buflen); 710 if (jvmciName != NULL) { 711 st->print(" (%s)", jvmciName); 712 } 713 } 714 #endif 715 } else { 716 st->print("J " PTR_FORMAT, p2i(pc())); 717 } 718 } else if (_cb->is_runtime_stub()) { 719 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name()); 720 } else if (_cb->is_deoptimization_stub()) { 721 st->print("v ~DeoptimizationBlob"); 722 } else if (_cb->is_exception_stub()) { 723 st->print("v ~ExceptionBlob"); 724 } else if (_cb->is_safepoint_stub()) { 725 st->print("v ~SafepointBlob"); 726 } else { 727 st->print("v blob " PTR_FORMAT, p2i(pc())); 728 } 729 } else { 730 print_C_frame(st, buf, buflen, pc()); 731 } 732 } 733 734 735 /* 736 The interpreter_frame_expression_stack_at method in the case of SPARC needs the 737 max_stack value of the method in order to compute the expression stack address. 738 It uses the Method* in order to get the max_stack value but during GC this 739 Method* value saved on the frame is changed by reverse_and_push and hence cannot 740 be used. So we save the max_stack value in the FrameClosure object and pass it 741 down to the interpreter_frame_expression_stack_at method 742 */ 743 class InterpreterFrameClosure : public OffsetClosure { 744 private: 745 frame* _fr; 746 OopClosure* _f; 747 int _max_locals; 748 int _max_stack; 749 750 public: 751 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack, 752 OopClosure* f) { 753 _fr = fr; 754 _max_locals = max_locals; 755 _max_stack = max_stack; 756 _f = f; 757 } 758 759 void offset_do(int offset) { 760 oop* addr; 761 if (offset < _max_locals) { 762 addr = (oop*) _fr->interpreter_frame_local_at(offset); 763 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); 764 _f->do_oop(addr); 765 } else { 766 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); 767 // In case of exceptions, the expression stack is invalid and the esp will be reset to express 768 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). 769 bool in_stack; 770 if (frame::interpreter_frame_expression_stack_direction() > 0) { 771 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); 772 } else { 773 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); 774 } 775 if (in_stack) { 776 _f->do_oop(addr); 777 } 778 } 779 } 780 781 int max_locals() { return _max_locals; } 782 frame* fr() { return _fr; } 783 }; 784 785 786 class InterpretedArgumentOopFinder: public SignatureInfo { 787 private: 788 OopClosure* _f; // Closure to invoke 789 int _offset; // TOS-relative offset, decremented with each argument 790 bool _has_receiver; // true if the callee has a receiver 791 frame* _fr; 792 793 void set(int size, BasicType type) { 794 _offset -= size; 795 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do(); 796 } 797 798 void oop_offset_do() { 799 oop* addr; 800 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); 801 _f->do_oop(addr); 802 } 803 804 public: 805 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) { 806 // compute size of arguments 807 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); 808 assert(!fr->is_interpreted_frame() || 809 args_size <= fr->interpreter_frame_expression_stack_size(), 810 "args cannot be on stack anymore"); 811 // initialize InterpretedArgumentOopFinder 812 _f = f; 813 _fr = fr; 814 _offset = args_size; 815 } 816 817 void oops_do() { 818 if (_has_receiver) { 819 --_offset; 820 oop_offset_do(); 821 } 822 iterate_parameters(); 823 } 824 }; 825 826 827 // Entry frame has following form (n arguments) 828 // +-----------+ 829 // sp -> | last arg | 830 // +-----------+ 831 // : ::: : 832 // +-----------+ 833 // (sp+n)->| first arg| 834 // +-----------+ 835 836 837 838 // visits and GC's all the arguments in entry frame 839 class EntryFrameOopFinder: public SignatureInfo { 840 private: 841 bool _is_static; 842 int _offset; 843 frame* _fr; 844 OopClosure* _f; 845 846 void set(int size, BasicType type) { 847 assert (_offset >= 0, "illegal offset"); 848 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset); 849 _offset -= size; 850 } 851 852 void oop_at_offset_do(int offset) { 853 assert (offset >= 0, "illegal offset"); 854 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); 855 _f->do_oop(addr); 856 } 857 858 public: 859 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) { 860 _f = NULL; // will be set later 861 _fr = frame; 862 _is_static = is_static; 863 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0 864 } 865 866 void arguments_do(OopClosure* f) { 867 _f = f; 868 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver 869 iterate_parameters(); 870 } 871 872 }; 873 874 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) { 875 ArgumentSizeComputer asc(signature); 876 int size = asc.size(); 877 return (oop *)interpreter_frame_tos_at(size); 878 } 879 880 881 void frame::oops_interpreted_do(OopClosure* f, const RegisterMap* map, bool query_oop_map_cache) { 882 assert(is_interpreted_frame(), "Not an interpreted frame"); 883 assert(map != NULL, "map must be set"); 884 Thread *thread = Thread::current(); 885 methodHandle m (thread, interpreter_frame_method()); 886 jint bci = interpreter_frame_bci(); 887 888 assert(!GC::gc()->heap()->is_in(m()), 889 "must be valid oop"); 890 assert(m->is_method(), "checking frame value"); 891 assert((m->is_native() && bci == 0) || 892 (!m->is_native() && bci >= 0 && bci < m->code_size()), 893 "invalid bci value"); 894 895 // Handle the monitor elements in the activation 896 for ( 897 BasicObjectLock* current = interpreter_frame_monitor_end(); 898 current < interpreter_frame_monitor_begin(); 899 current = next_monitor_in_interpreter_frame(current) 900 ) { 901 #ifdef ASSERT 902 interpreter_frame_verify_monitor(current); 903 #endif 904 current->oops_do(f); 905 } 906 907 if (m->is_native()) { 908 f->do_oop(interpreter_frame_temp_oop_addr()); 909 } 910 911 // The method pointer in the frame might be the only path to the method's 912 // klass, and the klass needs to be kept alive while executing. The GCs 913 // don't trace through method pointers, so the mirror of the method's klass 914 // is installed as a GC root. 915 f->do_oop(interpreter_frame_mirror_addr()); 916 917 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 918 919 Symbol* signature = NULL; 920 bool has_receiver = false; 921 922 // Process a callee's arguments if we are at a call site 923 // (i.e., if we are at an invoke bytecode) 924 // This is used sometimes for calling into the VM, not for another 925 // interpreted or compiled frame. 926 if (!m->is_native()) { 927 Bytecode_invoke call = Bytecode_invoke_check(m, bci); 928 if (call.is_valid()) { 929 signature = call.signature(); 930 has_receiver = call.has_receiver(); 931 if (map->include_argument_oops() && 932 interpreter_frame_expression_stack_size() > 0) { 933 ResourceMark rm(thread); // is this right ??? 934 // we are at a call site & the expression stack is not empty 935 // => process callee's arguments 936 // 937 // Note: The expression stack can be empty if an exception 938 // occurred during method resolution/execution. In all 939 // cases we empty the expression stack completely be- 940 // fore handling the exception (the exception handling 941 // code in the interpreter calls a blocking runtime 942 // routine which can cause this code to be executed). 943 // (was bug gri 7/27/98) 944 oops_interpreted_arguments_do(signature, has_receiver, f); 945 } 946 } 947 } 948 949 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); 950 951 // process locals & expression stack 952 InterpreterOopMap mask; 953 if (query_oop_map_cache) { 954 m->mask_for(bci, &mask); 955 } else { 956 OopMapCache::compute_one_oop_map(m, bci, &mask); 957 } 958 mask.iterate_oop(&blk); 959 } 960 961 962 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) { 963 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); 964 finder.oops_do(); 965 } 966 967 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) { 968 assert(_cb != NULL, "sanity check"); 969 if (_cb->oop_maps() != NULL) { 970 OopMapSet::oops_do(this, reg_map, f); 971 972 // Preserve potential arguments for a callee. We handle this by dispatching 973 // on the codeblob. For c2i, we do 974 if (reg_map->include_argument_oops()) { 975 _cb->preserve_callee_argument_oops(*this, reg_map, f); 976 } 977 } 978 // In cases where perm gen is collected, GC will want to mark 979 // oops referenced from nmethods active on thread stacks so as to 980 // prevent them from being collected. However, this visit should be 981 // restricted to certain phases of the collection only. The 982 // closure decides how it wants nmethods to be traced. 983 if (cf != NULL) 984 cf->do_code_blob(_cb); 985 } 986 987 class CompiledArgumentOopFinder: public SignatureInfo { 988 protected: 989 OopClosure* _f; 990 int _offset; // the current offset, incremented with each argument 991 bool _has_receiver; // true if the callee has a receiver 992 bool _has_appendix; // true if the call has an appendix 993 frame _fr; 994 RegisterMap* _reg_map; 995 int _arg_size; 996 VMRegPair* _regs; // VMReg list of arguments 997 998 void set(int size, BasicType type) { 999 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset(); 1000 _offset += size; 1001 } 1002 1003 virtual void handle_oop_offset() { 1004 // Extract low order register number from register array. 1005 // In LP64-land, the high-order bits are valid but unhelpful. 1006 VMReg reg = _regs[_offset].first(); 1007 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map); 1008 _f->do_oop(loc); 1009 } 1010 1011 public: 1012 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map) 1013 : SignatureInfo(signature) { 1014 1015 // initialize CompiledArgumentOopFinder 1016 _f = f; 1017 _offset = 0; 1018 _has_receiver = has_receiver; 1019 _has_appendix = has_appendix; 1020 _fr = fr; 1021 _reg_map = (RegisterMap*)reg_map; 1022 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0); 1023 1024 int arg_size; 1025 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size); 1026 assert(arg_size == _arg_size, "wrong arg size"); 1027 } 1028 1029 void oops_do() { 1030 if (_has_receiver) { 1031 handle_oop_offset(); 1032 _offset++; 1033 } 1034 iterate_parameters(); 1035 if (_has_appendix) { 1036 handle_oop_offset(); 1037 _offset++; 1038 } 1039 } 1040 }; 1041 1042 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, 1043 const RegisterMap* reg_map, OopClosure* f) { 1044 ResourceMark rm; 1045 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map); 1046 finder.oops_do(); 1047 } 1048 1049 1050 // Get receiver out of callers frame, i.e. find parameter 0 in callers 1051 // frame. Consult ADLC for where parameter 0 is to be found. Then 1052 // check local reg_map for it being a callee-save register or argument 1053 // register, both of which are saved in the local frame. If not found 1054 // there, it must be an in-stack argument of the caller. 1055 // Note: caller.sp() points to callee-arguments 1056 oop frame::retrieve_receiver(RegisterMap* reg_map) { 1057 frame caller = *this; 1058 1059 // First consult the ADLC on where it puts parameter 0 for this signature. 1060 VMReg reg = SharedRuntime::name_for_receiver(); 1061 oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map); 1062 if (oop_adr == NULL) { 1063 guarantee(oop_adr != NULL, "bad register save location"); 1064 return NULL; 1065 } 1066 oop r = *oop_adr; 1067 assert(GC::gc()->heap()->is_in_or_null(r), "bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", p2i(r), p2i(r)); 1068 return r; 1069 } 1070 1071 1072 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const { 1073 if(reg->is_reg()) { 1074 // If it is passed in a register, it got spilled in the stub frame. 1075 return (oop *)reg_map->location(reg); 1076 } else { 1077 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size; 1078 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes); 1079 } 1080 } 1081 1082 BasicLock* frame::get_native_monitor() { 1083 nmethod* nm = (nmethod*)_cb; 1084 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1085 "Should not call this unless it's a native nmethod"); 1086 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset()); 1087 assert(byte_offset >= 0, "should not see invalid offset"); 1088 return (BasicLock*) &sp()[byte_offset / wordSize]; 1089 } 1090 1091 oop frame::get_native_receiver() { 1092 nmethod* nm = (nmethod*)_cb; 1093 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1094 "Should not call this unless it's a native nmethod"); 1095 int byte_offset = in_bytes(nm->native_receiver_sp_offset()); 1096 assert(byte_offset >= 0, "should not see invalid offset"); 1097 oop owner = ((oop*) sp())[byte_offset / wordSize]; 1098 assert( GC::gc()->heap()->is_in(owner), "bad receiver" ); 1099 return owner; 1100 } 1101 1102 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) { 1103 assert(map != NULL, "map must be set"); 1104 if (map->include_argument_oops()) { 1105 // must collect argument oops, as nobody else is doing it 1106 Thread *thread = Thread::current(); 1107 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); 1108 EntryFrameOopFinder finder(this, m->signature(), m->is_static()); 1109 finder.arguments_do(f); 1110 } 1111 // Traverse the Handle Block saved in the entry frame 1112 entry_frame_call_wrapper()->oops_do(f); 1113 } 1114 1115 1116 void frame::oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) { 1117 #ifndef PRODUCT 1118 // simulate GC crash here to dump java thread in error report 1119 if (CrashGCForDumpingJavaThread) { 1120 char *t = NULL; 1121 *t = 'c'; 1122 } 1123 #endif 1124 if (is_interpreted_frame()) { 1125 oops_interpreted_do(f, map, use_interpreter_oop_map_cache); 1126 } else if (is_entry_frame()) { 1127 oops_entry_do(f, map); 1128 } else if (CodeCache::contains(pc())) { 1129 oops_code_blob_do(f, cf, map); 1130 #ifdef SHARK 1131 } else if (is_fake_stub_frame()) { 1132 // nothing to do 1133 #endif // SHARK 1134 } else { 1135 ShouldNotReachHere(); 1136 } 1137 } 1138 1139 void frame::nmethods_do(CodeBlobClosure* cf) { 1140 if (_cb != NULL && _cb->is_nmethod()) { 1141 cf->do_code_blob(_cb); 1142 } 1143 } 1144 1145 1146 // call f() on the interpreted Method*s in the stack. 1147 // Have to walk the entire code cache for the compiled frames Yuck. 1148 void frame::metadata_do(void f(Metadata*)) { 1149 if (is_interpreted_frame()) { 1150 Method* m = this->interpreter_frame_method(); 1151 assert(m != NULL, "expecting a method in this frame"); 1152 f(m); 1153 } 1154 } 1155 1156 void frame::verify(const RegisterMap* map) { 1157 // for now make sure receiver type is correct 1158 if (is_interpreted_frame()) { 1159 Method* method = interpreter_frame_method(); 1160 guarantee(method->is_method(), "method is wrong in frame::verify"); 1161 if (!method->is_static()) { 1162 // fetch the receiver 1163 oop* p = (oop*) interpreter_frame_local_at(0); 1164 // make sure we have the right receiver type 1165 } 1166 } 1167 #if defined(COMPILER2) || INCLUDE_JVMCI 1168 assert(DerivedPointerTable::is_empty(), "must be empty before verify"); 1169 #endif 1170 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, (RegisterMap*)map, false); 1171 } 1172 1173 1174 #ifdef ASSERT 1175 bool frame::verify_return_pc(address x) { 1176 if (StubRoutines::returns_to_call_stub(x)) { 1177 return true; 1178 } 1179 if (CodeCache::contains(x)) { 1180 return true; 1181 } 1182 if (Interpreter::contains(x)) { 1183 return true; 1184 } 1185 return false; 1186 } 1187 #endif 1188 1189 #ifdef ASSERT 1190 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { 1191 assert(is_interpreted_frame(), "Not an interpreted frame"); 1192 // verify that the value is in the right part of the frame 1193 address low_mark = (address) interpreter_frame_monitor_end(); 1194 address high_mark = (address) interpreter_frame_monitor_begin(); 1195 address current = (address) value; 1196 1197 const int monitor_size = frame::interpreter_frame_monitor_size(); 1198 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); 1199 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); 1200 1201 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); 1202 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); 1203 } 1204 #endif 1205 1206 #ifndef PRODUCT 1207 void frame::describe(FrameValues& values, int frame_no) { 1208 // boundaries: sp and the 'real' frame pointer 1209 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1); 1210 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp() 1211 1212 // print frame info at the highest boundary 1213 intptr_t* info_address = MAX2(sp(), frame_pointer); 1214 1215 if (info_address != frame_pointer) { 1216 // print frame_pointer explicitly if not marked by the frame info 1217 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1); 1218 } 1219 1220 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) { 1221 // Label values common to most frames 1222 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no)); 1223 } 1224 1225 if (is_interpreted_frame()) { 1226 Method* m = interpreter_frame_method(); 1227 int bci = interpreter_frame_bci(); 1228 1229 // Label the method and current bci 1230 values.describe(-1, info_address, 1231 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2); 1232 values.describe(-1, info_address, 1233 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1); 1234 if (m->max_locals() > 0) { 1235 intptr_t* l0 = interpreter_frame_local_at(0); 1236 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1); 1237 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1); 1238 // Report each local and mark as owned by this frame 1239 for (int l = 0; l < m->max_locals(); l++) { 1240 intptr_t* l0 = interpreter_frame_local_at(l); 1241 values.describe(frame_no, l0, err_msg("local %d", l)); 1242 } 1243 } 1244 1245 // Compute the actual expression stack size 1246 InterpreterOopMap mask; 1247 OopMapCache::compute_one_oop_map(m, bci, &mask); 1248 intptr_t* tos = NULL; 1249 // Report each stack element and mark as owned by this frame 1250 for (int e = 0; e < mask.expression_stack_size(); e++) { 1251 tos = MAX2(tos, interpreter_frame_expression_stack_at(e)); 1252 values.describe(frame_no, interpreter_frame_expression_stack_at(e), 1253 err_msg("stack %d", e)); 1254 } 1255 if (tos != NULL) { 1256 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1); 1257 } 1258 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) { 1259 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin"); 1260 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end"); 1261 } 1262 } else if (is_entry_frame()) { 1263 // For now just label the frame 1264 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2); 1265 } else if (is_compiled_frame()) { 1266 // For now just label the frame 1267 CompiledMethod* cm = (CompiledMethod*)cb(); 1268 values.describe(-1, info_address, 1269 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no, 1270 p2i(cm), cm->method()->name_and_sig_as_C_string(), 1271 (_deopt_state == is_deoptimized) ? 1272 " (deoptimized)" : 1273 ((_deopt_state == unknown) ? " (state unknown)" : "")), 1274 2); 1275 } else if (is_native_frame()) { 1276 // For now just label the frame 1277 nmethod* nm = cb()->as_nmethod_or_null(); 1278 values.describe(-1, info_address, 1279 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no, 1280 p2i(nm), nm->method()->name_and_sig_as_C_string()), 2); 1281 } else { 1282 // provide default info if not handled before 1283 char *info = (char *) "special frame"; 1284 if ((_cb != NULL) && 1285 (_cb->name() != NULL)) { 1286 info = (char *)_cb->name(); 1287 } 1288 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2); 1289 } 1290 1291 // platform dependent additional data 1292 describe_pd(values, frame_no); 1293 } 1294 1295 #endif 1296 1297 1298 //----------------------------------------------------------------------------------- 1299 // StackFrameStream implementation 1300 1301 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) { 1302 assert(thread->has_last_Java_frame(), "sanity check"); 1303 _fr = thread->last_frame(); 1304 _is_done = false; 1305 } 1306 1307 1308 #ifndef PRODUCT 1309 1310 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) { 1311 FrameValue fv; 1312 fv.location = location; 1313 fv.owner = owner; 1314 fv.priority = priority; 1315 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1); 1316 strcpy(fv.description, description); 1317 _values.append(fv); 1318 } 1319 1320 1321 #ifdef ASSERT 1322 void FrameValues::validate() { 1323 _values.sort(compare); 1324 bool error = false; 1325 FrameValue prev; 1326 prev.owner = -1; 1327 for (int i = _values.length() - 1; i >= 0; i--) { 1328 FrameValue fv = _values.at(i); 1329 if (fv.owner == -1) continue; 1330 if (prev.owner == -1) { 1331 prev = fv; 1332 continue; 1333 } 1334 if (prev.location == fv.location) { 1335 if (fv.owner != prev.owner) { 1336 tty->print_cr("overlapping storage"); 1337 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", p2i(prev.location), *prev.location, prev.description); 1338 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", p2i(fv.location), *fv.location, fv.description); 1339 error = true; 1340 } 1341 } else { 1342 prev = fv; 1343 } 1344 } 1345 assert(!error, "invalid layout"); 1346 } 1347 #endif // ASSERT 1348 1349 void FrameValues::print(JavaThread* thread) { 1350 _values.sort(compare); 1351 1352 // Sometimes values like the fp can be invalid values if the 1353 // register map wasn't updated during the walk. Trim out values 1354 // that aren't actually in the stack of the thread. 1355 int min_index = 0; 1356 int max_index = _values.length() - 1; 1357 intptr_t* v0 = _values.at(min_index).location; 1358 intptr_t* v1 = _values.at(max_index).location; 1359 1360 if (thread == Thread::current()) { 1361 while (!thread->is_in_stack((address)v0)) { 1362 v0 = _values.at(++min_index).location; 1363 } 1364 while (!thread->is_in_stack((address)v1)) { 1365 v1 = _values.at(--max_index).location; 1366 } 1367 } else { 1368 while (!thread->on_local_stack((address)v0)) { 1369 v0 = _values.at(++min_index).location; 1370 } 1371 while (!thread->on_local_stack((address)v1)) { 1372 v1 = _values.at(--max_index).location; 1373 } 1374 } 1375 intptr_t* min = MIN2(v0, v1); 1376 intptr_t* max = MAX2(v0, v1); 1377 intptr_t* cur = max; 1378 intptr_t* last = NULL; 1379 for (int i = max_index; i >= min_index; i--) { 1380 FrameValue fv = _values.at(i); 1381 while (cur > fv.location) { 1382 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, p2i(cur), *cur); 1383 cur--; 1384 } 1385 if (last == fv.location) { 1386 const char* spacer = " " LP64_ONLY(" "); 1387 tty->print_cr(" %s %s %s", spacer, spacer, fv.description); 1388 } else { 1389 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", p2i(fv.location), *fv.location, fv.description); 1390 last = fv.location; 1391 cur--; 1392 } 1393 } 1394 } 1395 1396 #endif // ndef PRODUCT