frame.cpp revision 9056:dc9930a04ab0
1/* 2 * Copyright (c) 1997, 2015, 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 54PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 55 56RegisterMap::RegisterMap(JavaThread *thread, bool update_map) { 57 _thread = thread; 58 _update_map = update_map; 59 clear(); 60 debug_only(_update_for_id = NULL;) 61#ifndef PRODUCT 62 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL; 63#endif /* PRODUCT */ 64} 65 66RegisterMap::RegisterMap(const RegisterMap* map) { 67 assert(map != this, "bad initialization parameter"); 68 assert(map != NULL, "RegisterMap must be present"); 69 _thread = map->thread(); 70 _update_map = map->update_map(); 71 _include_argument_oops = map->include_argument_oops(); 72 debug_only(_update_for_id = map->_update_for_id;) 73 pd_initialize_from(map); 74 if (update_map()) { 75 for(int i = 0; i < location_valid_size; i++) { 76 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i]; 77 _location_valid[i] = bits; 78 // for whichever bits are set, pull in the corresponding map->_location 79 int j = i*location_valid_type_size; 80 while (bits != 0) { 81 if ((bits & 1) != 0) { 82 assert(0 <= j && j < reg_count, "range check"); 83 _location[j] = map->_location[j]; 84 } 85 bits >>= 1; 86 j += 1; 87 } 88 } 89 } 90} 91 92void RegisterMap::clear() { 93 set_include_argument_oops(true); 94 if (_update_map) { 95 for(int i = 0; i < location_valid_size; i++) { 96 _location_valid[i] = 0; 97 } 98 pd_clear(); 99 } else { 100 pd_initialize(); 101 } 102} 103 104#ifndef PRODUCT 105 106void RegisterMap::print_on(outputStream* st) const { 107 st->print_cr("Register map"); 108 for(int i = 0; i < reg_count; i++) { 109 110 VMReg r = VMRegImpl::as_VMReg(i); 111 intptr_t* src = (intptr_t*) location(r); 112 if (src != NULL) { 113 114 r->print_on(st); 115 st->print(" [" INTPTR_FORMAT "] = ", src); 116 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { 117 st->print_cr("<misaligned>"); 118 } else { 119 st->print_cr(INTPTR_FORMAT, *src); 120 } 121 } 122 } 123} 124 125void RegisterMap::print() const { 126 print_on(tty); 127} 128 129#endif 130// This returns the pc that if you were in the debugger you'd see. Not 131// the idealized value in the frame object. This undoes the magic conversion 132// that happens for deoptimized frames. In addition it makes the value the 133// hardware would want to see in the native frame. The only user (at this point) 134// is deoptimization. It likely no one else should ever use it. 135 136address frame::raw_pc() const { 137 if (is_deoptimized_frame()) { 138 nmethod* nm = cb()->as_nmethod_or_null(); 139 if (nm->is_method_handle_return(pc())) 140 return nm->deopt_mh_handler_begin() - pc_return_offset; 141 else 142 return nm->deopt_handler_begin() - pc_return_offset; 143 } else { 144 return (pc() - pc_return_offset); 145 } 146} 147 148// Change the pc in a frame object. This does not change the actual pc in 149// actual frame. To do that use patch_pc. 150// 151void frame::set_pc(address newpc ) { 152#ifdef ASSERT 153 if (_cb != NULL && _cb->is_nmethod()) { 154 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); 155 } 156#endif // ASSERT 157 158 // Unsafe to use the is_deoptimzed tester after changing pc 159 _deopt_state = unknown; 160 _pc = newpc; 161 _cb = CodeCache::find_blob_unsafe(_pc); 162 163} 164 165// type testers 166bool frame::is_ignored_frame() const { 167 return false; // FIXME: some LambdaForm frames should be ignored 168} 169bool frame::is_deoptimized_frame() const { 170 assert(_deopt_state != unknown, "not answerable"); 171 return _deopt_state == is_deoptimized; 172} 173 174bool frame::is_native_frame() const { 175 return (_cb != NULL && 176 _cb->is_nmethod() && 177 ((nmethod*)_cb)->is_native_method()); 178} 179 180bool frame::is_java_frame() const { 181 if (is_interpreted_frame()) return true; 182 if (is_compiled_frame()) return true; 183 return false; 184} 185 186 187bool frame::is_compiled_frame() const { 188 if (_cb != NULL && 189 _cb->is_nmethod() && 190 ((nmethod*)_cb)->is_java_method()) { 191 return true; 192 } 193 return false; 194} 195 196 197bool frame::is_runtime_frame() const { 198 return (_cb != NULL && _cb->is_runtime_stub()); 199} 200 201bool frame::is_safepoint_blob_frame() const { 202 return (_cb != NULL && _cb->is_safepoint_stub()); 203} 204 205// testers 206 207bool frame::is_first_java_frame() const { 208 RegisterMap map(JavaThread::current(), false); // No update 209 frame s; 210 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); 211 return s.is_first_frame(); 212} 213 214 215bool frame::entry_frame_is_first() const { 216 return entry_frame_call_wrapper()->is_first_frame(); 217} 218 219JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const { 220 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr(); 221 address addr = (address) jcw; 222 223 // addr must be within the usable part of the stack 224 if (thread->is_in_usable_stack(addr)) { 225 return *jcw; 226 } 227 228 return NULL; 229} 230 231bool frame::should_be_deoptimized() const { 232 if (_deopt_state == is_deoptimized || 233 !is_compiled_frame() ) return false; 234 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod"); 235 nmethod* nm = (nmethod *)_cb; 236 if (TraceDependencies) { 237 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); 238 nm->print_value_on(tty); 239 tty->cr(); 240 } 241 242 if( !nm->is_marked_for_deoptimization() ) 243 return false; 244 245 // If at the return point, then the frame has already been popped, and 246 // only the return needs to be executed. Don't deoptimize here. 247 return !nm->is_at_poll_return(pc()); 248} 249 250bool frame::can_be_deoptimized() const { 251 if (!is_compiled_frame()) return false; 252 nmethod* nm = (nmethod*)_cb; 253 254 if( !nm->can_be_deoptimized() ) 255 return false; 256 257 return !nm->is_at_poll_return(pc()); 258} 259 260void frame::deoptimize(JavaThread* thread) { 261 // Schedule deoptimization of an nmethod activation with this frame. 262 assert(_cb != NULL && _cb->is_nmethod(), "must be"); 263 nmethod* nm = (nmethod*)_cb; 264 265 // This is a fix for register window patching race 266 if (NeedsDeoptSuspend && Thread::current() != thread) { 267 assert(SafepointSynchronize::is_at_safepoint(), 268 "patching other threads for deopt may only occur at a safepoint"); 269 270 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that 271 // we could see the frame again and ask for it to be deoptimized since 272 // it might move for a long time. That is harmless and we just ignore it. 273 if (id() == thread->must_deopt_id()) { 274 assert(thread->is_deopt_suspend(), "lost suspension"); 275 return; 276 } 277 278 // We are at a safepoint so the target thread can only be 279 // in 4 states: 280 // blocked - no problem 281 // blocked_trans - no problem (i.e. could have woken up from blocked 282 // during a safepoint). 283 // native - register window pc patching race 284 // native_trans - momentary state 285 // 286 // We could just wait out a thread in native_trans to block. 287 // Then we'd have all the issues that the safepoint code has as to 288 // whether to spin or block. It isn't worth it. Just treat it like 289 // native and be done with it. 290 // 291 // Examine the state of the thread at the start of safepoint since 292 // threads that were in native at the start of the safepoint could 293 // come to a halt during the safepoint, changing the current value 294 // of the safepoint_state. 295 JavaThreadState state = thread->safepoint_state()->orig_thread_state(); 296 if (state == _thread_in_native || state == _thread_in_native_trans) { 297 // Since we are at a safepoint the target thread will stop itself 298 // before it can return to java as long as we remain at the safepoint. 299 // Therefore we can put an additional request for the thread to stop 300 // no matter what no (like a suspend). This will cause the thread 301 // to notice it needs to do the deopt on its own once it leaves native. 302 // 303 // The only reason we must do this is because on machine with register 304 // windows we have a race with patching the return address and the 305 // window coming live as the thread returns to the Java code (but still 306 // in native mode) and then blocks. It is only this top most frame 307 // that is at risk. So in truth we could add an additional check to 308 // see if this frame is one that is at risk. 309 RegisterMap map(thread, false); 310 frame at_risk = thread->last_frame().sender(&map); 311 if (id() == at_risk.id()) { 312 thread->set_must_deopt_id(id()); 313 thread->set_deopt_suspend(); 314 return; 315 } 316 } 317 } // NeedsDeoptSuspend 318 319 320 // If the call site is a MethodHandle call site use the MH deopt 321 // handler. 322 address deopt = nm->is_method_handle_return(pc()) ? 323 nm->deopt_mh_handler_begin() : 324 nm->deopt_handler_begin(); 325 326 // Save the original pc before we patch in the new one 327 nm->set_original_pc(this, pc()); 328 patch_pc(thread, deopt); 329 330#ifdef ASSERT 331 { 332 RegisterMap map(thread, false); 333 frame check = thread->last_frame(); 334 while (id() != check.id()) { 335 check = check.sender(&map); 336 } 337 assert(check.is_deoptimized_frame(), "missed deopt"); 338 } 339#endif // ASSERT 340} 341 342frame frame::java_sender() const { 343 RegisterMap map(JavaThread::current(), false); 344 frame s; 345 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; 346 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); 347 return s; 348} 349 350frame frame::real_sender(RegisterMap* map) const { 351 frame result = sender(map); 352 while (result.is_runtime_frame() || 353 result.is_ignored_frame()) { 354 result = result.sender(map); 355 } 356 return result; 357} 358 359// Note: called by profiler - NOT for current thread 360frame frame::profile_find_Java_sender_frame(JavaThread *thread) { 361// If we don't recognize this frame, walk back up the stack until we do 362 RegisterMap map(thread, false); 363 frame first_java_frame = frame(); 364 365 // Find the first Java frame on the stack starting with input frame 366 if (is_java_frame()) { 367 // top frame is compiled frame or deoptimized frame 368 first_java_frame = *this; 369 } else if (safe_for_sender(thread)) { 370 for (frame sender_frame = sender(&map); 371 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame(); 372 sender_frame = sender_frame.sender(&map)) { 373 if (sender_frame.is_java_frame()) { 374 first_java_frame = sender_frame; 375 break; 376 } 377 } 378 } 379 return first_java_frame; 380} 381 382// Interpreter frames 383 384 385void frame::interpreter_frame_set_locals(intptr_t* locs) { 386 assert(is_interpreted_frame(), "Not an interpreted frame"); 387 *interpreter_frame_locals_addr() = locs; 388} 389 390Method* frame::interpreter_frame_method() const { 391 assert(is_interpreted_frame(), "interpreted frame expected"); 392 Method* m = *interpreter_frame_method_addr(); 393 assert(m->is_method(), "not a Method*"); 394 return m; 395} 396 397void frame::interpreter_frame_set_method(Method* method) { 398 assert(is_interpreted_frame(), "interpreted frame expected"); 399 *interpreter_frame_method_addr() = method; 400} 401 402jint frame::interpreter_frame_bci() const { 403 assert(is_interpreted_frame(), "interpreted frame expected"); 404 address bcp = interpreter_frame_bcp(); 405 return interpreter_frame_method()->bci_from(bcp); 406} 407 408address frame::interpreter_frame_bcp() const { 409 assert(is_interpreted_frame(), "interpreted frame expected"); 410 address bcp = (address)*interpreter_frame_bcp_addr(); 411 return interpreter_frame_method()->bcp_from(bcp); 412} 413 414void frame::interpreter_frame_set_bcp(address bcp) { 415 assert(is_interpreted_frame(), "interpreted frame expected"); 416 *interpreter_frame_bcp_addr() = (intptr_t)bcp; 417} 418 419address frame::interpreter_frame_mdp() const { 420 assert(ProfileInterpreter, "must be profiling interpreter"); 421 assert(is_interpreted_frame(), "interpreted frame expected"); 422 return (address)*interpreter_frame_mdp_addr(); 423} 424 425void frame::interpreter_frame_set_mdp(address mdp) { 426 assert(is_interpreted_frame(), "interpreted frame expected"); 427 assert(ProfileInterpreter, "must be profiling interpreter"); 428 *interpreter_frame_mdp_addr() = (intptr_t)mdp; 429} 430 431BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { 432 assert(is_interpreted_frame(), "Not an interpreted frame"); 433#ifdef ASSERT 434 interpreter_frame_verify_monitor(current); 435#endif 436 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); 437 return next; 438} 439 440BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { 441 assert(is_interpreted_frame(), "Not an interpreted frame"); 442#ifdef ASSERT 443// // This verification needs to be checked before being enabled 444// interpreter_frame_verify_monitor(current); 445#endif 446 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); 447 return previous; 448} 449 450// Interpreter locals and expression stack locations. 451 452intptr_t* frame::interpreter_frame_local_at(int index) const { 453 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; 454 return &((*interpreter_frame_locals_addr())[n]); 455} 456 457intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { 458 const int i = offset * interpreter_frame_expression_stack_direction(); 459 const int n = i * Interpreter::stackElementWords; 460 return &(interpreter_frame_expression_stack()[n]); 461} 462 463jint frame::interpreter_frame_expression_stack_size() const { 464 // Number of elements on the interpreter expression stack 465 // Callers should span by stackElementWords 466 int element_size = Interpreter::stackElementWords; 467 size_t stack_size = 0; 468 if (frame::interpreter_frame_expression_stack_direction() < 0) { 469 stack_size = (interpreter_frame_expression_stack() - 470 interpreter_frame_tos_address() + 1)/element_size; 471 } else { 472 stack_size = (interpreter_frame_tos_address() - 473 interpreter_frame_expression_stack() + 1)/element_size; 474 } 475 assert( stack_size <= (size_t)max_jint, "stack size too big"); 476 return ((jint)stack_size); 477} 478 479 480// (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) 481 482const char* frame::print_name() const { 483 if (is_native_frame()) return "Native"; 484 if (is_interpreted_frame()) return "Interpreted"; 485 if (is_compiled_frame()) { 486 if (is_deoptimized_frame()) return "Deoptimized"; 487 return "Compiled"; 488 } 489 if (sp() == NULL) return "Empty"; 490 return "C"; 491} 492 493void frame::print_value_on(outputStream* st, JavaThread *thread) const { 494 NOT_PRODUCT(address begin = pc()-40;) 495 NOT_PRODUCT(address end = NULL;) 496 497 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp()); 498 if (sp() != NULL) 499 st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), real_fp(), pc()); 500 501 if (StubRoutines::contains(pc())) { 502 st->print_cr(")"); 503 st->print("("); 504 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 505 st->print("~Stub::%s", desc->name()); 506 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) 507 } else if (Interpreter::contains(pc())) { 508 st->print_cr(")"); 509 st->print("("); 510 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); 511 if (desc != NULL) { 512 st->print("~"); 513 desc->print_on(st); 514 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) 515 } else { 516 st->print("~interpreter"); 517 } 518 } 519 st->print_cr(")"); 520 521 if (_cb != NULL) { 522 st->print(" "); 523 _cb->print_value_on(st); 524 st->cr(); 525#ifndef PRODUCT 526 if (end == NULL) { 527 begin = _cb->code_begin(); 528 end = _cb->code_end(); 529 } 530#endif 531 } 532 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);) 533} 534 535 536void frame::print_on(outputStream* st) const { 537 print_value_on(st,NULL); 538 if (is_interpreted_frame()) { 539 interpreter_frame_print_on(st); 540 } 541} 542 543 544void frame::interpreter_frame_print_on(outputStream* st) const { 545#ifndef PRODUCT 546 assert(is_interpreted_frame(), "Not an interpreted frame"); 547 jint i; 548 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { 549 intptr_t x = *interpreter_frame_local_at(i); 550 st->print(" - local [" INTPTR_FORMAT "]", x); 551 st->fill_to(23); 552 st->print_cr("; #%d", i); 553 } 554 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { 555 intptr_t x = *interpreter_frame_expression_stack_at(i); 556 st->print(" - stack [" INTPTR_FORMAT "]", x); 557 st->fill_to(23); 558 st->print_cr("; #%d", i); 559 } 560 // locks for synchronization 561 for (BasicObjectLock* current = interpreter_frame_monitor_end(); 562 current < interpreter_frame_monitor_begin(); 563 current = next_monitor_in_interpreter_frame(current)) { 564 st->print(" - obj ["); 565 current->obj()->print_value_on(st); 566 st->print_cr("]"); 567 st->print(" - lock ["); 568 current->lock()->print_on(st); 569 st->print_cr("]"); 570 } 571 // monitor 572 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin()); 573 // bcp 574 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp()); 575 st->fill_to(23); 576 st->print_cr("; @%d", interpreter_frame_bci()); 577 // locals 578 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0)); 579 // method 580 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method()); 581 st->fill_to(23); 582 st->print("; "); 583 interpreter_frame_method()->print_name(st); 584 st->cr(); 585#endif 586} 587 588// Print whether the frame is in the VM or OS indicating a HotSpot problem. 589// Otherwise, it's likely a bug in the native library that the Java code calls, 590// hopefully indicating where to submit bugs. 591void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) { 592 // C/C++ frame 593 bool in_vm = os::address_is_in_vm(pc); 594 st->print(in_vm ? "V" : "C"); 595 596 int offset; 597 bool found; 598 599 // libname 600 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); 601 if (found) { 602 // skip directory names 603 const char *p1, *p2; 604 p1 = buf; 605 int len = (int)strlen(os::file_separator()); 606 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 607 st->print(" [%s+0x%x]", p1, offset); 608 } else { 609 st->print(" " PTR_FORMAT, pc); 610 } 611 612 // function name - os::dll_address_to_function_name() may return confusing 613 // names if pc is within jvm.dll or libjvm.so, because JVM only has 614 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this 615 // only for native libraries. 616 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) { 617 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); 618 619 if (found) { 620 st->print(" %s+0x%x", buf, offset); 621 } 622 } 623} 624 625// frame::print_on_error() is called by fatal error handler. Notice that we may 626// crash inside this function if stack frame is corrupted. The fatal error 627// handler can catch and handle the crash. Here we assume the frame is valid. 628// 629// First letter indicates type of the frame: 630// J: Java frame (compiled) 631// j: Java frame (interpreted) 632// V: VM frame (C/C++) 633// v: Other frames running VM generated code (e.g. stubs, adapters, etc.) 634// C: C/C++ frame 635// 636// We don't need detailed frame type as that in frame::print_name(). "C" 637// suggests the problem is in user lib; everything else is likely a VM bug. 638 639void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { 640 if (_cb != NULL) { 641 if (Interpreter::contains(pc())) { 642 Method* m = this->interpreter_frame_method(); 643 if (m != NULL) { 644 m->name_and_sig_as_C_string(buf, buflen); 645 st->print("j %s", buf); 646 st->print("+%d", this->interpreter_frame_bci()); 647 } else { 648 st->print("j " PTR_FORMAT, pc()); 649 } 650 } else if (StubRoutines::contains(pc())) { 651 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 652 if (desc != NULL) { 653 st->print("v ~StubRoutines::%s", desc->name()); 654 } else { 655 st->print("v ~StubRoutines::" PTR_FORMAT, pc()); 656 } 657 } else if (_cb->is_buffer_blob()) { 658 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name()); 659 } else if (_cb->is_nmethod()) { 660 nmethod* nm = (nmethod*)_cb; 661 Method* m = nm->method(); 662 if (m != NULL) { 663 m->name_and_sig_as_C_string(buf, buflen); 664 st->print("J %d%s %s %s (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+0x%x]", 665 nm->compile_id(), (nm->is_osr_method() ? "%" : ""), 666 ((nm->compiler() != NULL) ? nm->compiler()->name() : ""), 667 buf, m->code_size(), _pc, _cb->code_begin(), _pc - _cb->code_begin()); 668 } else { 669 st->print("J " PTR_FORMAT, pc()); 670 } 671 } else if (_cb->is_runtime_stub()) { 672 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name()); 673 } else if (_cb->is_deoptimization_stub()) { 674 st->print("v ~DeoptimizationBlob"); 675 } else if (_cb->is_exception_stub()) { 676 st->print("v ~ExceptionBlob"); 677 } else if (_cb->is_safepoint_stub()) { 678 st->print("v ~SafepointBlob"); 679 } else { 680 st->print("v blob " PTR_FORMAT, pc()); 681 } 682 } else { 683 print_C_frame(st, buf, buflen, pc()); 684 } 685} 686 687 688/* 689 The interpreter_frame_expression_stack_at method in the case of SPARC needs the 690 max_stack value of the method in order to compute the expression stack address. 691 It uses the Method* in order to get the max_stack value but during GC this 692 Method* value saved on the frame is changed by reverse_and_push and hence cannot 693 be used. So we save the max_stack value in the FrameClosure object and pass it 694 down to the interpreter_frame_expression_stack_at method 695*/ 696class InterpreterFrameClosure : public OffsetClosure { 697 private: 698 frame* _fr; 699 OopClosure* _f; 700 int _max_locals; 701 int _max_stack; 702 703 public: 704 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack, 705 OopClosure* f) { 706 _fr = fr; 707 _max_locals = max_locals; 708 _max_stack = max_stack; 709 _f = f; 710 } 711 712 void offset_do(int offset) { 713 oop* addr; 714 if (offset < _max_locals) { 715 addr = (oop*) _fr->interpreter_frame_local_at(offset); 716 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); 717 _f->do_oop(addr); 718 } else { 719 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); 720 // In case of exceptions, the expression stack is invalid and the esp will be reset to express 721 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). 722 bool in_stack; 723 if (frame::interpreter_frame_expression_stack_direction() > 0) { 724 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); 725 } else { 726 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); 727 } 728 if (in_stack) { 729 _f->do_oop(addr); 730 } 731 } 732 } 733 734 int max_locals() { return _max_locals; } 735 frame* fr() { return _fr; } 736}; 737 738 739class InterpretedArgumentOopFinder: public SignatureInfo { 740 private: 741 OopClosure* _f; // Closure to invoke 742 int _offset; // TOS-relative offset, decremented with each argument 743 bool _has_receiver; // true if the callee has a receiver 744 frame* _fr; 745 746 void set(int size, BasicType type) { 747 _offset -= size; 748 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do(); 749 } 750 751 void oop_offset_do() { 752 oop* addr; 753 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); 754 _f->do_oop(addr); 755 } 756 757 public: 758 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) { 759 // compute size of arguments 760 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); 761 assert(!fr->is_interpreted_frame() || 762 args_size <= fr->interpreter_frame_expression_stack_size(), 763 "args cannot be on stack anymore"); 764 // initialize InterpretedArgumentOopFinder 765 _f = f; 766 _fr = fr; 767 _offset = args_size; 768 } 769 770 void oops_do() { 771 if (_has_receiver) { 772 --_offset; 773 oop_offset_do(); 774 } 775 iterate_parameters(); 776 } 777}; 778 779 780// Entry frame has following form (n arguments) 781// +-----------+ 782// sp -> | last arg | 783// +-----------+ 784// : ::: : 785// +-----------+ 786// (sp+n)->| first arg| 787// +-----------+ 788 789 790 791// visits and GC's all the arguments in entry frame 792class EntryFrameOopFinder: public SignatureInfo { 793 private: 794 bool _is_static; 795 int _offset; 796 frame* _fr; 797 OopClosure* _f; 798 799 void set(int size, BasicType type) { 800 assert (_offset >= 0, "illegal offset"); 801 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset); 802 _offset -= size; 803 } 804 805 void oop_at_offset_do(int offset) { 806 assert (offset >= 0, "illegal offset"); 807 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); 808 _f->do_oop(addr); 809 } 810 811 public: 812 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) { 813 _f = NULL; // will be set later 814 _fr = frame; 815 _is_static = is_static; 816 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0 817 } 818 819 void arguments_do(OopClosure* f) { 820 _f = f; 821 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver 822 iterate_parameters(); 823 } 824 825}; 826 827oop* frame::interpreter_callee_receiver_addr(Symbol* signature) { 828 ArgumentSizeComputer asc(signature); 829 int size = asc.size(); 830 return (oop *)interpreter_frame_tos_at(size); 831} 832 833 834void frame::oops_interpreted_do(OopClosure* f, CLDClosure* cld_f, 835 const RegisterMap* map, bool query_oop_map_cache) { 836 assert(is_interpreted_frame(), "Not an interpreted frame"); 837 assert(map != NULL, "map must be set"); 838 Thread *thread = Thread::current(); 839 methodHandle m (thread, interpreter_frame_method()); 840 jint bci = interpreter_frame_bci(); 841 842 assert(!Universe::heap()->is_in(m()), 843 "must be valid oop"); 844 assert(m->is_method(), "checking frame value"); 845 assert((m->is_native() && bci == 0) || 846 (!m->is_native() && bci >= 0 && bci < m->code_size()), 847 "invalid bci value"); 848 849 // Handle the monitor elements in the activation 850 for ( 851 BasicObjectLock* current = interpreter_frame_monitor_end(); 852 current < interpreter_frame_monitor_begin(); 853 current = next_monitor_in_interpreter_frame(current) 854 ) { 855#ifdef ASSERT 856 interpreter_frame_verify_monitor(current); 857#endif 858 current->oops_do(f); 859 } 860 861 // process fixed part 862 if (cld_f != NULL) { 863 // The method pointer in the frame might be the only path to the method's 864 // klass, and the klass needs to be kept alive while executing. The GCs 865 // don't trace through method pointers, so typically in similar situations 866 // the mirror or the class loader of the klass are installed as a GC root. 867 // To minimize the overhead of doing that here, we ask the GC to pass down a 868 // closure that knows how to keep klasses alive given a ClassLoaderData. 869 cld_f->do_cld(m->method_holder()->class_loader_data()); 870 } 871 872 if (m->is_native() PPC32_ONLY(&& m->is_static())) { 873 f->do_oop(interpreter_frame_temp_oop_addr()); 874 } 875 876 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 877 878 Symbol* signature = NULL; 879 bool has_receiver = false; 880 881 // Process a callee's arguments if we are at a call site 882 // (i.e., if we are at an invoke bytecode) 883 // This is used sometimes for calling into the VM, not for another 884 // interpreted or compiled frame. 885 if (!m->is_native()) { 886 Bytecode_invoke call = Bytecode_invoke_check(m, bci); 887 if (call.is_valid()) { 888 signature = call.signature(); 889 has_receiver = call.has_receiver(); 890 if (map->include_argument_oops() && 891 interpreter_frame_expression_stack_size() > 0) { 892 ResourceMark rm(thread); // is this right ??? 893 // we are at a call site & the expression stack is not empty 894 // => process callee's arguments 895 // 896 // Note: The expression stack can be empty if an exception 897 // occurred during method resolution/execution. In all 898 // cases we empty the expression stack completely be- 899 // fore handling the exception (the exception handling 900 // code in the interpreter calls a blocking runtime 901 // routine which can cause this code to be executed). 902 // (was bug gri 7/27/98) 903 oops_interpreted_arguments_do(signature, has_receiver, f); 904 } 905 } 906 } 907 908 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); 909 910 // process locals & expression stack 911 InterpreterOopMap mask; 912 if (query_oop_map_cache) { 913 m->mask_for(bci, &mask); 914 } else { 915 OopMapCache::compute_one_oop_map(m, bci, &mask); 916 } 917 mask.iterate_oop(&blk); 918} 919 920 921void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) { 922 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); 923 finder.oops_do(); 924} 925 926void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) { 927 assert(_cb != NULL, "sanity check"); 928 if (_cb->oop_maps() != NULL) { 929 OopMapSet::oops_do(this, reg_map, f); 930 931 // Preserve potential arguments for a callee. We handle this by dispatching 932 // on the codeblob. For c2i, we do 933 if (reg_map->include_argument_oops()) { 934 _cb->preserve_callee_argument_oops(*this, reg_map, f); 935 } 936 } 937 // In cases where perm gen is collected, GC will want to mark 938 // oops referenced from nmethods active on thread stacks so as to 939 // prevent them from being collected. However, this visit should be 940 // restricted to certain phases of the collection only. The 941 // closure decides how it wants nmethods to be traced. 942 if (cf != NULL) 943 cf->do_code_blob(_cb); 944} 945 946class CompiledArgumentOopFinder: public SignatureInfo { 947 protected: 948 OopClosure* _f; 949 int _offset; // the current offset, incremented with each argument 950 bool _has_receiver; // true if the callee has a receiver 951 bool _has_appendix; // true if the call has an appendix 952 frame _fr; 953 RegisterMap* _reg_map; 954 int _arg_size; 955 VMRegPair* _regs; // VMReg list of arguments 956 957 void set(int size, BasicType type) { 958 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset(); 959 _offset += size; 960 } 961 962 virtual void handle_oop_offset() { 963 // Extract low order register number from register array. 964 // In LP64-land, the high-order bits are valid but unhelpful. 965 VMReg reg = _regs[_offset].first(); 966 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map); 967 _f->do_oop(loc); 968 } 969 970 public: 971 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map) 972 : SignatureInfo(signature) { 973 974 // initialize CompiledArgumentOopFinder 975 _f = f; 976 _offset = 0; 977 _has_receiver = has_receiver; 978 _has_appendix = has_appendix; 979 _fr = fr; 980 _reg_map = (RegisterMap*)reg_map; 981 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0); 982 983 int arg_size; 984 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size); 985 assert(arg_size == _arg_size, "wrong arg size"); 986 } 987 988 void oops_do() { 989 if (_has_receiver) { 990 handle_oop_offset(); 991 _offset++; 992 } 993 iterate_parameters(); 994 if (_has_appendix) { 995 handle_oop_offset(); 996 _offset++; 997 } 998 } 999}; 1000 1001void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) { 1002 ResourceMark rm; 1003 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map); 1004 finder.oops_do(); 1005} 1006 1007 1008// Get receiver out of callers frame, i.e. find parameter 0 in callers 1009// frame. Consult ADLC for where parameter 0 is to be found. Then 1010// check local reg_map for it being a callee-save register or argument 1011// register, both of which are saved in the local frame. If not found 1012// there, it must be an in-stack argument of the caller. 1013// Note: caller.sp() points to callee-arguments 1014oop frame::retrieve_receiver(RegisterMap* reg_map) { 1015 frame caller = *this; 1016 1017 // First consult the ADLC on where it puts parameter 0 for this signature. 1018 VMReg reg = SharedRuntime::name_for_receiver(); 1019 oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map); 1020 if (oop_adr == NULL) { 1021 guarantee(oop_adr != NULL, "bad register save location"); 1022 return NULL; 1023 } 1024 oop r = *oop_adr; 1025 assert(Universe::heap()->is_in_or_null(r), "bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (void *) r, (void *) r); 1026 return r; 1027} 1028 1029 1030oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const { 1031 if(reg->is_reg()) { 1032 // If it is passed in a register, it got spilled in the stub frame. 1033 return (oop *)reg_map->location(reg); 1034 } else { 1035 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size; 1036 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes); 1037 } 1038} 1039 1040BasicLock* frame::get_native_monitor() { 1041 nmethod* nm = (nmethod*)_cb; 1042 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1043 "Should not call this unless it's a native nmethod"); 1044 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset()); 1045 assert(byte_offset >= 0, "should not see invalid offset"); 1046 return (BasicLock*) &sp()[byte_offset / wordSize]; 1047} 1048 1049oop frame::get_native_receiver() { 1050 nmethod* nm = (nmethod*)_cb; 1051 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1052 "Should not call this unless it's a native nmethod"); 1053 int byte_offset = in_bytes(nm->native_receiver_sp_offset()); 1054 assert(byte_offset >= 0, "should not see invalid offset"); 1055 oop owner = ((oop*) sp())[byte_offset / wordSize]; 1056 assert( Universe::heap()->is_in(owner), "bad receiver" ); 1057 return owner; 1058} 1059 1060void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) { 1061 assert(map != NULL, "map must be set"); 1062 if (map->include_argument_oops()) { 1063 // must collect argument oops, as nobody else is doing it 1064 Thread *thread = Thread::current(); 1065 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); 1066 EntryFrameOopFinder finder(this, m->signature(), m->is_static()); 1067 finder.arguments_do(f); 1068 } 1069 // Traverse the Handle Block saved in the entry frame 1070 entry_frame_call_wrapper()->oops_do(f); 1071} 1072 1073 1074void frame::oops_do_internal(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) { 1075#ifndef PRODUCT 1076 // simulate GC crash here to dump java thread in error report 1077 if (CrashGCForDumpingJavaThread) { 1078 char *t = NULL; 1079 *t = 'c'; 1080 } 1081#endif 1082 if (is_interpreted_frame()) { 1083 oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache); 1084 } else if (is_entry_frame()) { 1085 oops_entry_do(f, map); 1086 } else if (CodeCache::contains(pc())) { 1087 oops_code_blob_do(f, cf, map); 1088#ifdef SHARK 1089 } else if (is_fake_stub_frame()) { 1090 // nothing to do 1091#endif // SHARK 1092 } else { 1093 ShouldNotReachHere(); 1094 } 1095} 1096 1097void frame::nmethods_do(CodeBlobClosure* cf) { 1098 if (_cb != NULL && _cb->is_nmethod()) { 1099 cf->do_code_blob(_cb); 1100 } 1101} 1102 1103 1104// call f() on the interpreted Method*s in the stack. 1105// Have to walk the entire code cache for the compiled frames Yuck. 1106void frame::metadata_do(void f(Metadata*)) { 1107 if (is_interpreted_frame()) { 1108 Method* m = this->interpreter_frame_method(); 1109 assert(m != NULL, "expecting a method in this frame"); 1110 f(m); 1111 } 1112} 1113 1114# ifdef ENABLE_ZAP_DEAD_LOCALS 1115 1116void frame::CheckValueClosure::do_oop(oop* p) { 1117 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) { 1118 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); 1119 } 1120} 1121frame::CheckValueClosure frame::_check_value; 1122 1123 1124void frame::CheckOopClosure::do_oop(oop* p) { 1125 if (*p != NULL && !(*p)->is_oop()) { 1126 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); 1127 } 1128} 1129frame::CheckOopClosure frame::_check_oop; 1130 1131void frame::check_derived_oop(oop* base, oop* derived) { 1132 _check_oop.do_oop(base); 1133} 1134 1135 1136void frame::ZapDeadClosure::do_oop(oop* p) { 1137 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p); 1138 *p = cast_to_oop<intptr_t>(0xbabebabe); 1139} 1140frame::ZapDeadClosure frame::_zap_dead; 1141 1142void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) { 1143 assert(thread == Thread::current(), "need to synchronize to do this to another thread"); 1144 // Tracing - part 1 1145 if (TraceZapDeadLocals) { 1146 ResourceMark rm(thread); 1147 tty->print_cr("--------------------------------------------------------------------------------"); 1148 tty->print("Zapping dead locals in "); 1149 print_on(tty); 1150 tty->cr(); 1151 } 1152 // Zapping 1153 if (is_entry_frame ()) zap_dead_entry_locals (thread, map); 1154 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map); 1155 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map); 1156 1157 else 1158 // could be is_runtime_frame 1159 // so remove error: ShouldNotReachHere(); 1160 ; 1161 // Tracing - part 2 1162 if (TraceZapDeadLocals) { 1163 tty->cr(); 1164 } 1165} 1166 1167 1168void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) { 1169 // get current interpreter 'pc' 1170 assert(is_interpreted_frame(), "Not an interpreted frame"); 1171 Method* m = interpreter_frame_method(); 1172 int bci = interpreter_frame_bci(); 1173 1174 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 1175 1176 // process dynamic part 1177 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(), 1178 &_check_value); 1179 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(), 1180 &_check_oop ); 1181 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(), 1182 &_zap_dead ); 1183 1184 // get frame map 1185 InterpreterOopMap mask; 1186 m->mask_for(bci, &mask); 1187 mask.iterate_all( &oop_blk, &value_blk, &dead_blk); 1188} 1189 1190 1191void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) { 1192 1193 ResourceMark rm(thread); 1194 assert(_cb != NULL, "sanity check"); 1195 if (_cb->oop_maps() != NULL) { 1196 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value); 1197 } 1198} 1199 1200 1201void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) { 1202 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented"); 1203} 1204 1205 1206void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) { 1207 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented"); 1208} 1209 1210# endif // ENABLE_ZAP_DEAD_LOCALS 1211 1212void frame::verify(const RegisterMap* map) { 1213 // for now make sure receiver type is correct 1214 if (is_interpreted_frame()) { 1215 Method* method = interpreter_frame_method(); 1216 guarantee(method->is_method(), "method is wrong in frame::verify"); 1217 if (!method->is_static()) { 1218 // fetch the receiver 1219 oop* p = (oop*) interpreter_frame_local_at(0); 1220 // make sure we have the right receiver type 1221 } 1222 } 1223 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");) 1224 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false); 1225} 1226 1227 1228#ifdef ASSERT 1229bool frame::verify_return_pc(address x) { 1230 if (StubRoutines::returns_to_call_stub(x)) { 1231 return true; 1232 } 1233 if (CodeCache::contains(x)) { 1234 return true; 1235 } 1236 if (Interpreter::contains(x)) { 1237 return true; 1238 } 1239 return false; 1240} 1241#endif 1242 1243#ifdef ASSERT 1244void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { 1245 assert(is_interpreted_frame(), "Not an interpreted frame"); 1246 // verify that the value is in the right part of the frame 1247 address low_mark = (address) interpreter_frame_monitor_end(); 1248 address high_mark = (address) interpreter_frame_monitor_begin(); 1249 address current = (address) value; 1250 1251 const int monitor_size = frame::interpreter_frame_monitor_size(); 1252 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); 1253 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); 1254 1255 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); 1256 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); 1257} 1258#endif 1259 1260#ifndef PRODUCT 1261void frame::describe(FrameValues& values, int frame_no) { 1262 // boundaries: sp and the 'real' frame pointer 1263 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1); 1264 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp() 1265 1266 // print frame info at the highest boundary 1267 intptr_t* info_address = MAX2(sp(), frame_pointer); 1268 1269 if (info_address != frame_pointer) { 1270 // print frame_pointer explicitly if not marked by the frame info 1271 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1); 1272 } 1273 1274 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) { 1275 // Label values common to most frames 1276 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no)); 1277 } 1278 1279 if (is_interpreted_frame()) { 1280 Method* m = interpreter_frame_method(); 1281 int bci = interpreter_frame_bci(); 1282 1283 // Label the method and current bci 1284 values.describe(-1, info_address, 1285 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2); 1286 values.describe(-1, info_address, 1287 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1); 1288 if (m->max_locals() > 0) { 1289 intptr_t* l0 = interpreter_frame_local_at(0); 1290 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1); 1291 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1); 1292 // Report each local and mark as owned by this frame 1293 for (int l = 0; l < m->max_locals(); l++) { 1294 intptr_t* l0 = interpreter_frame_local_at(l); 1295 values.describe(frame_no, l0, err_msg("local %d", l)); 1296 } 1297 } 1298 1299 // Compute the actual expression stack size 1300 InterpreterOopMap mask; 1301 OopMapCache::compute_one_oop_map(m, bci, &mask); 1302 intptr_t* tos = NULL; 1303 // Report each stack element and mark as owned by this frame 1304 for (int e = 0; e < mask.expression_stack_size(); e++) { 1305 tos = MAX2(tos, interpreter_frame_expression_stack_at(e)); 1306 values.describe(frame_no, interpreter_frame_expression_stack_at(e), 1307 err_msg("stack %d", e)); 1308 } 1309 if (tos != NULL) { 1310 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1); 1311 } 1312 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) { 1313 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin"); 1314 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end"); 1315 } 1316 } else if (is_entry_frame()) { 1317 // For now just label the frame 1318 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2); 1319 } else if (is_compiled_frame()) { 1320 // For now just label the frame 1321 nmethod* nm = cb()->as_nmethod_or_null(); 1322 values.describe(-1, info_address, 1323 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no, 1324 nm, nm->method()->name_and_sig_as_C_string(), 1325 (_deopt_state == is_deoptimized) ? 1326 " (deoptimized)" : 1327 ((_deopt_state == unknown) ? " (state unknown)" : "")), 1328 2); 1329 } else if (is_native_frame()) { 1330 // For now just label the frame 1331 nmethod* nm = cb()->as_nmethod_or_null(); 1332 values.describe(-1, info_address, 1333 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no, 1334 nm, nm->method()->name_and_sig_as_C_string()), 2); 1335 } else { 1336 // provide default info if not handled before 1337 char *info = (char *) "special frame"; 1338 if ((_cb != NULL) && 1339 (_cb->name() != NULL)) { 1340 info = (char *)_cb->name(); 1341 } 1342 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2); 1343 } 1344 1345 // platform dependent additional data 1346 describe_pd(values, frame_no); 1347} 1348 1349#endif 1350 1351 1352//----------------------------------------------------------------------------------- 1353// StackFrameStream implementation 1354 1355StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) { 1356 assert(thread->has_last_Java_frame(), "sanity check"); 1357 _fr = thread->last_frame(); 1358 _is_done = false; 1359} 1360 1361 1362#ifndef PRODUCT 1363 1364void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) { 1365 FrameValue fv; 1366 fv.location = location; 1367 fv.owner = owner; 1368 fv.priority = priority; 1369 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1); 1370 strcpy(fv.description, description); 1371 _values.append(fv); 1372} 1373 1374 1375#ifdef ASSERT 1376void FrameValues::validate() { 1377 _values.sort(compare); 1378 bool error = false; 1379 FrameValue prev; 1380 prev.owner = -1; 1381 for (int i = _values.length() - 1; i >= 0; i--) { 1382 FrameValue fv = _values.at(i); 1383 if (fv.owner == -1) continue; 1384 if (prev.owner == -1) { 1385 prev = fv; 1386 continue; 1387 } 1388 if (prev.location == fv.location) { 1389 if (fv.owner != prev.owner) { 1390 tty->print_cr("overlapping storage"); 1391 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description); 1392 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description); 1393 error = true; 1394 } 1395 } else { 1396 prev = fv; 1397 } 1398 } 1399 assert(!error, "invalid layout"); 1400} 1401#endif // ASSERT 1402 1403void FrameValues::print(JavaThread* thread) { 1404 _values.sort(compare); 1405 1406 // Sometimes values like the fp can be invalid values if the 1407 // register map wasn't updated during the walk. Trim out values 1408 // that aren't actually in the stack of the thread. 1409 int min_index = 0; 1410 int max_index = _values.length() - 1; 1411 intptr_t* v0 = _values.at(min_index).location; 1412 intptr_t* v1 = _values.at(max_index).location; 1413 1414 if (thread == Thread::current()) { 1415 while (!thread->is_in_stack((address)v0)) { 1416 v0 = _values.at(++min_index).location; 1417 } 1418 while (!thread->is_in_stack((address)v1)) { 1419 v1 = _values.at(--max_index).location; 1420 } 1421 } else { 1422 while (!thread->on_local_stack((address)v0)) { 1423 v0 = _values.at(++min_index).location; 1424 } 1425 while (!thread->on_local_stack((address)v1)) { 1426 v1 = _values.at(--max_index).location; 1427 } 1428 } 1429 intptr_t* min = MIN2(v0, v1); 1430 intptr_t* max = MAX2(v0, v1); 1431 intptr_t* cur = max; 1432 intptr_t* last = NULL; 1433 for (int i = max_index; i >= min_index; i--) { 1434 FrameValue fv = _values.at(i); 1435 while (cur > fv.location) { 1436 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur); 1437 cur--; 1438 } 1439 if (last == fv.location) { 1440 const char* spacer = " " LP64_ONLY(" "); 1441 tty->print_cr(" %s %s %s", spacer, spacer, fv.description); 1442 } else { 1443 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description); 1444 last = fv.location; 1445 cur--; 1446 } 1447 } 1448} 1449 1450#endif // ndef PRODUCT 1451