1 /* 2 * Copyright (c) 1997, 2013, 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 "compiler/abstractCompiler.hpp" 27 #include "compiler/disassembler.hpp" 28 #include "gc_interface/collectedHeap.inline.hpp" 29 #include "interpreter/interpreter.hpp" 30 #include "interpreter/oopMapCache.hpp" 31 #include "memory/resourceArea.hpp" 32 #include "memory/universe.inline.hpp" 33 #include "oops/markOop.hpp" 34 #include "oops/methodData.hpp" 35 #include "oops/method.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "oops/oop.inline2.hpp" 38 #include "prims/methodHandles.hpp" 39 #include "runtime/frame.inline.hpp" 40 #include "runtime/handles.inline.hpp" 41 #include "runtime/javaCalls.hpp" 42 #include "runtime/monitorChunk.hpp" 43 #include "runtime/sharedRuntime.hpp" 44 #include "runtime/signature.hpp" 45 #include "runtime/stubCodeGenerator.hpp" 46 #include "runtime/stubRoutines.hpp" 47 #include "utilities/decoder.hpp" 48 49 #ifdef TARGET_ARCH_x86 50 # include "nativeInst_x86.hpp" 51 #endif 52 #ifdef TARGET_ARCH_sparc 53 # include "nativeInst_sparc.hpp" 54 #endif 55 #ifdef TARGET_ARCH_zero 56 # include "nativeInst_zero.hpp" 57 #endif 58 #ifdef TARGET_ARCH_arm 59 # include "nativeInst_arm.hpp" 60 #endif 61 #ifdef TARGET_ARCH_ppc 62 # include "nativeInst_ppc.hpp" 63 #endif 64 65 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) { 66 _thread = thread; 67 _update_map = update_map; 68 clear(); 69 debug_only(_update_for_id = NULL;) 70 #ifndef PRODUCT 71 for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL; 72 #endif /* PRODUCT */ 73 } 74 75 RegisterMap::RegisterMap(const RegisterMap* map) { 76 assert(map != this, "bad initialization parameter"); 77 assert(map != NULL, "RegisterMap must be present"); 78 _thread = map->thread(); 79 _update_map = map->update_map(); 80 _include_argument_oops = map->include_argument_oops(); 81 debug_only(_update_for_id = map->_update_for_id;) 82 pd_initialize_from(map); 83 if (update_map()) { 84 for(int i = 0; i < location_valid_size; i++) { 85 LocationValidType bits = !update_map() ? 0 : map->_location_valid[i]; 86 _location_valid[i] = bits; 87 // for whichever bits are set, pull in the corresponding map->_location 88 int j = i*location_valid_type_size; 89 while (bits != 0) { 90 if ((bits & 1) != 0) { 91 assert(0 <= j && j < reg_count, "range check"); 92 _location[j] = map->_location[j]; 93 } 94 bits >>= 1; 95 j += 1; 96 } 97 } 98 } 99 } 100 101 void RegisterMap::clear() { 102 set_include_argument_oops(true); 103 if (_update_map) { 104 for(int i = 0; i < location_valid_size; i++) { 105 _location_valid[i] = 0; 106 } 107 pd_clear(); 108 } else { 109 pd_initialize(); 110 } 111 } 112 113 #ifndef PRODUCT 114 115 void RegisterMap::print_on(outputStream* st) const { 116 st->print_cr("Register map"); 117 for(int i = 0; i < reg_count; i++) { 118 119 VMReg r = VMRegImpl::as_VMReg(i); 120 intptr_t* src = (intptr_t*) location(r); 121 if (src != NULL) { 122 123 r->print_on(st); 124 st->print(" [" INTPTR_FORMAT "] = ", src); 125 if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { 126 st->print_cr("<misaligned>"); 127 } else { 128 st->print_cr(INTPTR_FORMAT, *src); 129 } 130 } 131 } 132 } 133 134 void RegisterMap::print() const { 135 print_on(tty); 136 } 137 138 #endif 139 // This returns the pc that if you were in the debugger you'd see. Not 140 // the idealized value in the frame object. This undoes the magic conversion 141 // that happens for deoptimized frames. In addition it makes the value the 142 // hardware would want to see in the native frame. The only user (at this point) 143 // is deoptimization. It likely no one else should ever use it. 144 145 address frame::raw_pc() const { 146 if (is_deoptimized_frame()) { 147 nmethod* nm = cb()->as_nmethod_or_null(); 148 if (nm->is_method_handle_return(pc())) 149 return nm->deopt_mh_handler_begin() - pc_return_offset; 150 else 151 return nm->deopt_handler_begin() - pc_return_offset; 152 } else { 153 return (pc() - pc_return_offset); 154 } 155 } 156 157 // Change the pc in a frame object. This does not change the actual pc in 158 // actual frame. To do that use patch_pc. 159 // 160 void frame::set_pc(address newpc ) { 161 #ifdef ASSERT 162 if (_cb != NULL && _cb->is_nmethod()) { 163 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); 164 } 165 #endif // ASSERT 166 167 // Unsafe to use the is_deoptimzed tester after changing pc 168 _deopt_state = unknown; 169 _pc = newpc; 170 _cb = CodeCache::find_blob_unsafe(_pc); 171 172 } 173 174 // type testers 175 bool frame::is_ignored_frame() const { 176 return false; // FIXME: some LambdaForm frames should be ignored 177 } 178 bool frame::is_deoptimized_frame() const { 179 assert(_deopt_state != unknown, "not answerable"); 180 return _deopt_state == is_deoptimized; 181 } 182 183 bool frame::is_native_frame() const { 184 return (_cb != NULL && 185 _cb->is_nmethod() && 186 ((nmethod*)_cb)->is_native_method()); 187 } 188 189 bool frame::is_java_frame() const { 190 if (is_interpreted_frame()) return true; 191 if (is_compiled_frame()) return true; 192 return false; 193 } 194 195 196 bool frame::is_compiled_frame() const { 197 if (_cb != NULL && 198 _cb->is_nmethod() && 199 ((nmethod*)_cb)->is_java_method()) { 200 return true; 201 } 202 return false; 203 } 204 205 206 bool frame::is_runtime_frame() const { 207 return (_cb != NULL && _cb->is_runtime_stub()); 208 } 209 210 bool frame::is_safepoint_blob_frame() const { 211 return (_cb != NULL && _cb->is_safepoint_stub()); 212 } 213 214 // testers 215 216 bool frame::is_first_java_frame() const { 217 RegisterMap map(JavaThread::current(), false); // No update 218 frame s; 219 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); 220 return s.is_first_frame(); 221 } 222 223 224 bool frame::entry_frame_is_first() const { 225 return entry_frame_call_wrapper()->is_first_frame(); 226 } 227 228 JavaCallWrapper* frame::entry_frame_call_wrapper_if_safe(JavaThread* thread) const { 229 JavaCallWrapper** jcw = entry_frame_call_wrapper_addr(); 230 address addr = (address) jcw; 231 232 // addr must be within the usable part of the stack 233 if (thread->is_in_usable_stack(addr)) { 234 return *jcw; 235 } 236 237 return NULL; 238 } 239 240 bool frame::should_be_deoptimized() const { 241 if (_deopt_state == is_deoptimized || 242 !is_compiled_frame() ) return false; 243 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod"); 244 nmethod* nm = (nmethod *)_cb; 245 if (TraceDependencies) { 246 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); 247 nm->print_value_on(tty); 248 tty->cr(); 249 } 250 251 if( !nm->is_marked_for_deoptimization() ) 252 return false; 253 254 // If at the return point, then the frame has already been popped, and 255 // only the return needs to be executed. Don't deoptimize here. 256 return !nm->is_at_poll_return(pc()); 257 } 258 259 bool frame::can_be_deoptimized() const { 260 if (!is_compiled_frame()) return false; 261 nmethod* nm = (nmethod*)_cb; 262 263 if( !nm->can_be_deoptimized() ) 264 return false; 265 266 return !nm->is_at_poll_return(pc()); 267 } 268 269 void frame::deoptimize(JavaThread* thread) { 270 // Schedule deoptimization of an nmethod activation with this frame. 271 assert(_cb != NULL && _cb->is_nmethod(), "must be"); 272 nmethod* nm = (nmethod*)_cb; 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 address deopt = nm->is_method_handle_return(pc()) ? 332 nm->deopt_mh_handler_begin() : 333 nm->deopt_handler_begin(); 334 335 // Save the original pc before we patch in the new one 336 nm->set_original_pc(this, pc()); 337 patch_pc(thread, deopt); 338 339 #ifdef ASSERT 340 { 341 RegisterMap map(thread, false); 342 frame check = thread->last_frame(); 343 while (id() != check.id()) { 344 check = check.sender(&map); 345 } 346 assert(check.is_deoptimized_frame(), "missed deopt"); 347 } 348 #endif // ASSERT 349 } 350 351 frame frame::java_sender() const { 352 RegisterMap map(JavaThread::current(), false); 353 frame s; 354 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; 355 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); 356 return s; 357 } 358 359 frame frame::real_sender(RegisterMap* map) const { 360 frame result = sender(map); 361 while (result.is_runtime_frame() || 362 result.is_ignored_frame()) { 363 result = result.sender(map); 364 } 365 return result; 366 } 367 368 // Note: called by profiler - NOT for current thread 369 frame frame::profile_find_Java_sender_frame(JavaThread *thread) { 370 // If we don't recognize this frame, walk back up the stack until we do 371 RegisterMap map(thread, false); 372 frame first_java_frame = frame(); 373 374 // Find the first Java frame on the stack starting with input frame 375 if (is_java_frame()) { 376 // top frame is compiled frame or deoptimized frame 377 first_java_frame = *this; 378 } else if (safe_for_sender(thread)) { 379 for (frame sender_frame = sender(&map); 380 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame(); 381 sender_frame = sender_frame.sender(&map)) { 382 if (sender_frame.is_java_frame()) { 383 first_java_frame = sender_frame; 384 break; 385 } 386 } 387 } 388 return first_java_frame; 389 } 390 391 // Interpreter frames 392 393 394 void frame::interpreter_frame_set_locals(intptr_t* locs) { 395 assert(is_interpreted_frame(), "Not an interpreted frame"); 396 *interpreter_frame_locals_addr() = locs; 397 } 398 399 Method* frame::interpreter_frame_method() const { 400 assert(is_interpreted_frame(), "interpreted frame expected"); 401 Method* m = *interpreter_frame_method_addr(); 402 assert(m->is_method(), "not a Method*"); 403 return m; 404 } 405 406 void frame::interpreter_frame_set_method(Method* method) { 407 assert(is_interpreted_frame(), "interpreted frame expected"); 408 *interpreter_frame_method_addr() = method; 409 } 410 411 void frame::interpreter_frame_set_bcx(intptr_t bcx) { 412 assert(is_interpreted_frame(), "Not an interpreted frame"); 413 if (ProfileInterpreter) { 414 bool formerly_bci = is_bci(interpreter_frame_bcx()); 415 bool is_now_bci = is_bci(bcx); 416 *interpreter_frame_bcx_addr() = bcx; 417 418 intptr_t mdx = interpreter_frame_mdx(); 419 420 if (mdx != 0) { 421 if (formerly_bci) { 422 if (!is_now_bci) { 423 // The bcx was just converted from bci to bcp. 424 // Convert the mdx in parallel. 425 MethodData* mdo = interpreter_frame_method()->method_data(); 426 assert(mdo != NULL, ""); 427 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one. 428 address mdp = mdo->di_to_dp(mdi); 429 interpreter_frame_set_mdx((intptr_t)mdp); 430 } 431 } else { 432 if (is_now_bci) { 433 // The bcx was just converted from bcp to bci. 434 // Convert the mdx in parallel. 435 MethodData* mdo = interpreter_frame_method()->method_data(); 436 assert(mdo != NULL, ""); 437 int mdi = mdo->dp_to_di((address)mdx); 438 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0. 439 } 440 } 441 } 442 } else { 443 *interpreter_frame_bcx_addr() = bcx; 444 } 445 } 446 447 jint frame::interpreter_frame_bci() const { 448 assert(is_interpreted_frame(), "interpreted frame expected"); 449 intptr_t bcx = interpreter_frame_bcx(); 450 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx); 451 } 452 453 void frame::interpreter_frame_set_bci(jint bci) { 454 assert(is_interpreted_frame(), "interpreted frame expected"); 455 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC"); 456 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci)); 457 } 458 459 address frame::interpreter_frame_bcp() const { 460 assert(is_interpreted_frame(), "interpreted frame expected"); 461 intptr_t bcx = interpreter_frame_bcx(); 462 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx; 463 } 464 465 void frame::interpreter_frame_set_bcp(address bcp) { 466 assert(is_interpreted_frame(), "interpreted frame expected"); 467 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC"); 468 interpreter_frame_set_bcx((intptr_t)bcp); 469 } 470 471 void frame::interpreter_frame_set_mdx(intptr_t mdx) { 472 assert(is_interpreted_frame(), "Not an interpreted frame"); 473 assert(ProfileInterpreter, "must be profiling interpreter"); 474 *interpreter_frame_mdx_addr() = mdx; 475 } 476 477 address frame::interpreter_frame_mdp() const { 478 assert(ProfileInterpreter, "must be profiling interpreter"); 479 assert(is_interpreted_frame(), "interpreted frame expected"); 480 intptr_t bcx = interpreter_frame_bcx(); 481 intptr_t mdx = interpreter_frame_mdx(); 482 483 assert(!is_bci(bcx), "should not access mdp during GC"); 484 return (address)mdx; 485 } 486 487 void frame::interpreter_frame_set_mdp(address mdp) { 488 assert(is_interpreted_frame(), "interpreted frame expected"); 489 if (mdp == NULL) { 490 // Always allow the mdp to be cleared. 491 interpreter_frame_set_mdx((intptr_t)mdp); 492 } 493 intptr_t bcx = interpreter_frame_bcx(); 494 assert(!is_bci(bcx), "should not set mdp during GC"); 495 interpreter_frame_set_mdx((intptr_t)mdp); 496 } 497 498 BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { 499 assert(is_interpreted_frame(), "Not an interpreted frame"); 500 #ifdef ASSERT 501 interpreter_frame_verify_monitor(current); 502 #endif 503 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); 504 return next; 505 } 506 507 BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { 508 assert(is_interpreted_frame(), "Not an interpreted frame"); 509 #ifdef ASSERT 510 // // This verification needs to be checked before being enabled 511 // interpreter_frame_verify_monitor(current); 512 #endif 513 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); 514 return previous; 515 } 516 517 // Interpreter locals and expression stack locations. 518 519 intptr_t* frame::interpreter_frame_local_at(int index) const { 520 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; 521 return &((*interpreter_frame_locals_addr())[n]); 522 } 523 524 intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { 525 const int i = offset * interpreter_frame_expression_stack_direction(); 526 const int n = i * Interpreter::stackElementWords; 527 return &(interpreter_frame_expression_stack()[n]); 528 } 529 530 jint frame::interpreter_frame_expression_stack_size() const { 531 // Number of elements on the interpreter expression stack 532 // Callers should span by stackElementWords 533 int element_size = Interpreter::stackElementWords; 534 if (frame::interpreter_frame_expression_stack_direction() < 0) { 535 return (interpreter_frame_expression_stack() - 536 interpreter_frame_tos_address() + 1)/element_size; 537 } else { 538 return (interpreter_frame_tos_address() - 539 interpreter_frame_expression_stack() + 1)/element_size; 540 } 541 } 542 543 544 // (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) 545 546 const char* frame::print_name() const { 547 if (is_native_frame()) return "Native"; 548 if (is_interpreted_frame()) return "Interpreted"; 549 if (is_compiled_frame()) { 550 if (is_deoptimized_frame()) return "Deoptimized"; 551 return "Compiled"; 552 } 553 if (sp() == NULL) return "Empty"; 554 return "C"; 555 } 556 557 void frame::print_value_on(outputStream* st, JavaThread *thread) const { 558 NOT_PRODUCT(address begin = pc()-40;) 559 NOT_PRODUCT(address end = NULL;) 560 561 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp()); 562 if (sp() != NULL) 563 st->print(", fp=" INTPTR_FORMAT ", real_fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), real_fp(), pc()); 564 565 if (StubRoutines::contains(pc())) { 566 st->print_cr(")"); 567 st->print("("); 568 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 569 st->print("~Stub::%s", desc->name()); 570 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) 571 } else if (Interpreter::contains(pc())) { 572 st->print_cr(")"); 573 st->print("("); 574 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); 575 if (desc != NULL) { 576 st->print("~"); 577 desc->print_on(st); 578 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) 579 } else { 580 st->print("~interpreter"); 581 } 582 } 583 st->print_cr(")"); 584 585 if (_cb != NULL) { 586 st->print(" "); 587 _cb->print_value_on(st); 588 st->cr(); 589 #ifndef PRODUCT 590 if (end == NULL) { 591 begin = _cb->code_begin(); 592 end = _cb->code_end(); 593 } 594 #endif 595 } 596 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);) 597 } 598 599 600 void frame::print_on(outputStream* st) const { 601 print_value_on(st,NULL); 602 if (is_interpreted_frame()) { 603 interpreter_frame_print_on(st); 604 } 605 } 606 607 608 void frame::interpreter_frame_print_on(outputStream* st) const { 609 #ifndef PRODUCT 610 assert(is_interpreted_frame(), "Not an interpreted frame"); 611 jint i; 612 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { 613 intptr_t x = *interpreter_frame_local_at(i); 614 st->print(" - local [" INTPTR_FORMAT "]", x); 615 st->fill_to(23); 616 st->print_cr("; #%d", i); 617 } 618 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { 619 intptr_t x = *interpreter_frame_expression_stack_at(i); 620 st->print(" - stack [" INTPTR_FORMAT "]", x); 621 st->fill_to(23); 622 st->print_cr("; #%d", i); 623 } 624 // locks for synchronization 625 for (BasicObjectLock* current = interpreter_frame_monitor_end(); 626 current < interpreter_frame_monitor_begin(); 627 current = next_monitor_in_interpreter_frame(current)) { 628 st->print(" - obj ["); 629 current->obj()->print_value_on(st); 630 st->print_cr("]"); 631 st->print(" - lock ["); 632 current->lock()->print_on(st); 633 st->print_cr("]"); 634 } 635 // monitor 636 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin()); 637 // bcp 638 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp()); 639 st->fill_to(23); 640 st->print_cr("; @%d", interpreter_frame_bci()); 641 // locals 642 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0)); 643 // method 644 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method()); 645 st->fill_to(23); 646 st->print("; "); 647 interpreter_frame_method()->print_name(st); 648 st->cr(); 649 #endif 650 } 651 652 // Print whether the frame is in the VM or OS indicating a HotSpot problem. 653 // Otherwise, it's likely a bug in the native library that the Java code calls, 654 // hopefully indicating where to submit bugs. 655 void frame::print_C_frame(outputStream* st, char* buf, int buflen, address pc) { 656 // C/C++ frame 657 bool in_vm = os::address_is_in_vm(pc); 658 st->print(in_vm ? "V" : "C"); 659 660 int offset; 661 bool found; 662 663 // libname 664 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); 665 if (found) { 666 // skip directory names 667 const char *p1, *p2; 668 p1 = buf; 669 int len = (int)strlen(os::file_separator()); 670 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 671 st->print(" [%s+0x%x]", p1, offset); 672 } else { 673 st->print(" " PTR_FORMAT, pc); 674 } 675 676 // function name - os::dll_address_to_function_name() may return confusing 677 // names if pc is within jvm.dll or libjvm.so, because JVM only has 678 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this 679 // only for native libraries. 680 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) { 681 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); 682 683 if (found) { 684 st->print(" %s+0x%x", buf, offset); 685 } 686 } 687 } 688 689 // frame::print_on_error() is called by fatal error handler. Notice that we may 690 // crash inside this function if stack frame is corrupted. The fatal error 691 // handler can catch and handle the crash. Here we assume the frame is valid. 692 // 693 // First letter indicates type of the frame: 694 // J: Java frame (compiled) 695 // j: Java frame (interpreted) 696 // V: VM frame (C/C++) 697 // v: Other frames running VM generated code (e.g. stubs, adapters, etc.) 698 // C: C/C++ frame 699 // 700 // We don't need detailed frame type as that in frame::print_name(). "C" 701 // suggests the problem is in user lib; everything else is likely a VM bug. 702 703 void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { 704 if (_cb != NULL) { 705 if (Interpreter::contains(pc())) { 706 Method* m = this->interpreter_frame_method(); 707 if (m != NULL) { 708 m->name_and_sig_as_C_string(buf, buflen); 709 st->print("j %s", buf); 710 st->print("+%d", this->interpreter_frame_bci()); 711 } else { 712 st->print("j " PTR_FORMAT, pc()); 713 } 714 } else if (StubRoutines::contains(pc())) { 715 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 716 if (desc != NULL) { 717 st->print("v ~StubRoutines::%s", desc->name()); 718 } else { 719 st->print("v ~StubRoutines::" PTR_FORMAT, pc()); 720 } 721 } else if (_cb->is_buffer_blob()) { 722 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name()); 723 } else if (_cb->is_nmethod()) { 724 nmethod* nm = (nmethod*)_cb; 725 Method* m = nm->method(); 726 if (m != NULL) { 727 m->name_and_sig_as_C_string(buf, buflen); 728 st->print("J %d%s %s %s (%d bytes) @ " PTR_FORMAT " [" PTR_FORMAT "+0x%x]", 729 nm->compile_id(), (nm->is_osr_method() ? "%" : ""), 730 ((nm->compiler() != NULL) ? nm->compiler()->name() : ""), 731 buf, m->code_size(), _pc, _cb->code_begin(), _pc - _cb->code_begin()); 732 } else { 733 st->print("J " PTR_FORMAT, pc()); 734 } 735 } else if (_cb->is_runtime_stub()) { 736 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name()); 737 } else if (_cb->is_deoptimization_stub()) { 738 st->print("v ~DeoptimizationBlob"); 739 } else if (_cb->is_exception_stub()) { 740 st->print("v ~ExceptionBlob"); 741 } else if (_cb->is_safepoint_stub()) { 742 st->print("v ~SafepointBlob"); 743 } else { 744 st->print("v blob " PTR_FORMAT, pc()); 745 } 746 } else { 747 print_C_frame(st, buf, buflen, pc()); 748 } 749 } 750 751 752 /* 753 The interpreter_frame_expression_stack_at method in the case of SPARC needs the 754 max_stack value of the method in order to compute the expression stack address. 755 It uses the Method* in order to get the max_stack value but during GC this 756 Method* value saved on the frame is changed by reverse_and_push and hence cannot 757 be used. So we save the max_stack value in the FrameClosure object and pass it 758 down to the interpreter_frame_expression_stack_at method 759 */ 760 class InterpreterFrameClosure : public OffsetClosure { 761 private: 762 frame* _fr; 763 OopClosure* _f; 764 int _max_locals; 765 int _max_stack; 766 767 public: 768 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack, 769 OopClosure* f) { 770 _fr = fr; 771 _max_locals = max_locals; 772 _max_stack = max_stack; 773 _f = f; 774 } 775 776 void offset_do(int offset) { 777 oop* addr; 778 if (offset < _max_locals) { 779 addr = (oop*) _fr->interpreter_frame_local_at(offset); 780 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); 781 _f->do_oop(addr); 782 } else { 783 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); 784 // In case of exceptions, the expression stack is invalid and the esp will be reset to express 785 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). 786 bool in_stack; 787 if (frame::interpreter_frame_expression_stack_direction() > 0) { 788 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); 789 } else { 790 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); 791 } 792 if (in_stack) { 793 _f->do_oop(addr); 794 } 795 } 796 } 797 798 int max_locals() { return _max_locals; } 799 frame* fr() { return _fr; } 800 }; 801 802 803 class InterpretedArgumentOopFinder: public SignatureInfo { 804 private: 805 OopClosure* _f; // Closure to invoke 806 int _offset; // TOS-relative offset, decremented with each argument 807 bool _has_receiver; // true if the callee has a receiver 808 frame* _fr; 809 810 void set(int size, BasicType type) { 811 _offset -= size; 812 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do(); 813 } 814 815 void oop_offset_do() { 816 oop* addr; 817 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); 818 _f->do_oop(addr); 819 } 820 821 public: 822 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) { 823 // compute size of arguments 824 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); 825 assert(!fr->is_interpreted_frame() || 826 args_size <= fr->interpreter_frame_expression_stack_size(), 827 "args cannot be on stack anymore"); 828 // initialize InterpretedArgumentOopFinder 829 _f = f; 830 _fr = fr; 831 _offset = args_size; 832 } 833 834 void oops_do() { 835 if (_has_receiver) { 836 --_offset; 837 oop_offset_do(); 838 } 839 iterate_parameters(); 840 } 841 }; 842 843 844 // Entry frame has following form (n arguments) 845 // +-----------+ 846 // sp -> | last arg | 847 // +-----------+ 848 // : ::: : 849 // +-----------+ 850 // (sp+n)->| first arg| 851 // +-----------+ 852 853 854 855 // visits and GC's all the arguments in entry frame 856 class EntryFrameOopFinder: public SignatureInfo { 857 private: 858 bool _is_static; 859 int _offset; 860 frame* _fr; 861 OopClosure* _f; 862 863 void set(int size, BasicType type) { 864 assert (_offset >= 0, "illegal offset"); 865 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset); 866 _offset -= size; 867 } 868 869 void oop_at_offset_do(int offset) { 870 assert (offset >= 0, "illegal offset"); 871 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); 872 _f->do_oop(addr); 873 } 874 875 public: 876 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) { 877 _f = NULL; // will be set later 878 _fr = frame; 879 _is_static = is_static; 880 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0 881 } 882 883 void arguments_do(OopClosure* f) { 884 _f = f; 885 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver 886 iterate_parameters(); 887 } 888 889 }; 890 891 oop* frame::interpreter_callee_receiver_addr(Symbol* signature) { 892 ArgumentSizeComputer asc(signature); 893 int size = asc.size(); 894 return (oop *)interpreter_frame_tos_at(size); 895 } 896 897 898 void frame::oops_interpreted_do(OopClosure* f, CLDToOopClosure* cld_f, 899 const RegisterMap* map, bool query_oop_map_cache) { 900 assert(is_interpreted_frame(), "Not an interpreted frame"); 901 assert(map != NULL, "map must be set"); 902 Thread *thread = Thread::current(); 903 methodHandle m (thread, interpreter_frame_method()); 904 jint bci = interpreter_frame_bci(); 905 906 assert(!Universe::heap()->is_in(m()), 907 "must be valid oop"); 908 assert(m->is_method(), "checking frame value"); 909 assert((m->is_native() && bci == 0) || 910 (!m->is_native() && bci >= 0 && bci < m->code_size()), 911 "invalid bci value"); 912 913 // Handle the monitor elements in the activation 914 for ( 915 BasicObjectLock* current = interpreter_frame_monitor_end(); 916 current < interpreter_frame_monitor_begin(); 917 current = next_monitor_in_interpreter_frame(current) 918 ) { 919 #ifdef ASSERT 920 interpreter_frame_verify_monitor(current); 921 #endif 922 current->oops_do(f); 923 } 924 925 // process fixed part 926 if (cld_f != NULL) { 927 // The method pointer in the frame might be the only path to the method's 928 // klass, and the klass needs to be kept alive while executing. The GCs 929 // don't trace through method pointers, so typically in similar situations 930 // the mirror or the class loader of the klass are installed as a GC root. 931 // To minimize the overhead of doing that here, we ask the GC to pass down a 932 // closure that knows how to keep klasses alive given a ClassLoaderData. 933 cld_f->do_cld(m->method_holder()->class_loader_data()); 934 } 935 936 #if !defined(PPC32) || defined(ZERO) 937 if (m->is_native()) { 938 #ifdef CC_INTERP 939 interpreterState istate = get_interpreterState(); 940 f->do_oop((oop*)&istate->_oop_temp); 941 #else 942 f->do_oop((oop*)( fp() + interpreter_frame_oop_temp_offset )); 943 #endif /* CC_INTERP */ 944 } 945 #else // PPC32 946 if (m->is_native() && m->is_static()) { 947 f->do_oop(interpreter_frame_mirror_addr()); 948 } 949 #endif // PPC32 950 951 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 952 953 Symbol* signature = NULL; 954 bool has_receiver = false; 955 956 // Process a callee's arguments if we are at a call site 957 // (i.e., if we are at an invoke bytecode) 958 // This is used sometimes for calling into the VM, not for another 959 // interpreted or compiled frame. 960 if (!m->is_native()) { 961 Bytecode_invoke call = Bytecode_invoke_check(m, bci); 962 if (call.is_valid()) { 963 signature = call.signature(); 964 has_receiver = call.has_receiver(); 965 if (map->include_argument_oops() && 966 interpreter_frame_expression_stack_size() > 0) { 967 ResourceMark rm(thread); // is this right ??? 968 // we are at a call site & the expression stack is not empty 969 // => process callee's arguments 970 // 971 // Note: The expression stack can be empty if an exception 972 // occurred during method resolution/execution. In all 973 // cases we empty the expression stack completely be- 974 // fore handling the exception (the exception handling 975 // code in the interpreter calls a blocking runtime 976 // routine which can cause this code to be executed). 977 // (was bug gri 7/27/98) 978 oops_interpreted_arguments_do(signature, has_receiver, f); 979 } 980 } 981 } 982 983 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); 984 985 // process locals & expression stack 986 InterpreterOopMap mask; 987 if (query_oop_map_cache) { 988 m->mask_for(bci, &mask); 989 } else { 990 OopMapCache::compute_one_oop_map(m, bci, &mask); 991 } 992 mask.iterate_oop(&blk); 993 } 994 995 996 void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) { 997 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); 998 finder.oops_do(); 999 } 1000 1001 void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) { 1002 assert(_cb != NULL, "sanity check"); 1003 if (_cb->oop_maps() != NULL) { 1004 OopMapSet::oops_do(this, reg_map, f); 1005 1006 // Preserve potential arguments for a callee. We handle this by dispatching 1007 // on the codeblob. For c2i, we do 1008 if (reg_map->include_argument_oops()) { 1009 _cb->preserve_callee_argument_oops(*this, reg_map, f); 1010 } 1011 } 1012 // In cases where perm gen is collected, GC will want to mark 1013 // oops referenced from nmethods active on thread stacks so as to 1014 // prevent them from being collected. However, this visit should be 1015 // restricted to certain phases of the collection only. The 1016 // closure decides how it wants nmethods to be traced. 1017 if (cf != NULL) 1018 cf->do_code_blob(_cb); 1019 } 1020 1021 class CompiledArgumentOopFinder: public SignatureInfo { 1022 protected: 1023 OopClosure* _f; 1024 int _offset; // the current offset, incremented with each argument 1025 bool _has_receiver; // true if the callee has a receiver 1026 bool _has_appendix; // true if the call has an appendix 1027 frame _fr; 1028 RegisterMap* _reg_map; 1029 int _arg_size; 1030 VMRegPair* _regs; // VMReg list of arguments 1031 1032 void set(int size, BasicType type) { 1033 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset(); 1034 _offset += size; 1035 } 1036 1037 virtual void handle_oop_offset() { 1038 // Extract low order register number from register array. 1039 // In LP64-land, the high-order bits are valid but unhelpful. 1040 VMReg reg = _regs[_offset].first(); 1041 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map); 1042 _f->do_oop(loc); 1043 } 1044 1045 public: 1046 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map) 1047 : SignatureInfo(signature) { 1048 1049 // initialize CompiledArgumentOopFinder 1050 _f = f; 1051 _offset = 0; 1052 _has_receiver = has_receiver; 1053 _has_appendix = has_appendix; 1054 _fr = fr; 1055 _reg_map = (RegisterMap*)reg_map; 1056 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0); 1057 1058 int arg_size; 1059 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size); 1060 assert(arg_size == _arg_size, "wrong arg size"); 1061 } 1062 1063 void oops_do() { 1064 if (_has_receiver) { 1065 handle_oop_offset(); 1066 _offset++; 1067 } 1068 iterate_parameters(); 1069 if (_has_appendix) { 1070 handle_oop_offset(); 1071 _offset++; 1072 } 1073 } 1074 }; 1075 1076 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) { 1077 ResourceMark rm; 1078 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map); 1079 finder.oops_do(); 1080 } 1081 1082 1083 // Get receiver out of callers frame, i.e. find parameter 0 in callers 1084 // frame. Consult ADLC for where parameter 0 is to be found. Then 1085 // check local reg_map for it being a callee-save register or argument 1086 // register, both of which are saved in the local frame. If not found 1087 // there, it must be an in-stack argument of the caller. 1088 // Note: caller.sp() points to callee-arguments 1089 oop frame::retrieve_receiver(RegisterMap* reg_map) { 1090 frame caller = *this; 1091 1092 // First consult the ADLC on where it puts parameter 0 for this signature. 1093 VMReg reg = SharedRuntime::name_for_receiver(); 1094 oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map); 1095 if (oop_adr == NULL) { 1096 guarantee(oop_adr != NULL, "bad register save location"); 1097 return NULL; 1098 } 1099 oop r = *oop_adr; 1100 assert(Universe::heap()->is_in_or_null(r), err_msg("bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (void *) r, (void *) r)); 1101 return r; 1102 } 1103 1104 1105 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const { 1106 if(reg->is_reg()) { 1107 // If it is passed in a register, it got spilled in the stub frame. 1108 return (oop *)reg_map->location(reg); 1109 } else { 1110 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size; 1111 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes); 1112 } 1113 } 1114 1115 BasicLock* frame::get_native_monitor() { 1116 nmethod* nm = (nmethod*)_cb; 1117 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1118 "Should not call this unless it's a native nmethod"); 1119 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset()); 1120 assert(byte_offset >= 0, "should not see invalid offset"); 1121 return (BasicLock*) &sp()[byte_offset / wordSize]; 1122 } 1123 1124 oop frame::get_native_receiver() { 1125 nmethod* nm = (nmethod*)_cb; 1126 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1127 "Should not call this unless it's a native nmethod"); 1128 int byte_offset = in_bytes(nm->native_receiver_sp_offset()); 1129 assert(byte_offset >= 0, "should not see invalid offset"); 1130 oop owner = ((oop*) sp())[byte_offset / wordSize]; 1131 assert( Universe::heap()->is_in(owner), "bad receiver" ); 1132 return owner; 1133 } 1134 1135 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) { 1136 assert(map != NULL, "map must be set"); 1137 if (map->include_argument_oops()) { 1138 // must collect argument oops, as nobody else is doing it 1139 Thread *thread = Thread::current(); 1140 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); 1141 EntryFrameOopFinder finder(this, m->signature(), m->is_static()); 1142 finder.arguments_do(f); 1143 } 1144 // Traverse the Handle Block saved in the entry frame 1145 entry_frame_call_wrapper()->oops_do(f); 1146 } 1147 1148 1149 void frame::oops_do_internal(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) { 1150 #ifndef PRODUCT 1151 // simulate GC crash here to dump java thread in error report 1152 if (CrashGCForDumpingJavaThread) { 1153 char *t = NULL; 1154 *t = 'c'; 1155 } 1156 #endif 1157 if (is_interpreted_frame()) { 1158 oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache); 1159 } else if (is_entry_frame()) { 1160 oops_entry_do(f, map); 1161 } else if (CodeCache::contains(pc())) { 1162 oops_code_blob_do(f, cf, map); 1163 #ifdef SHARK 1164 } else if (is_fake_stub_frame()) { 1165 // nothing to do 1166 #endif // SHARK 1167 } else { 1168 ShouldNotReachHere(); 1169 } 1170 } 1171 1172 void frame::nmethods_do(CodeBlobClosure* cf) { 1173 if (_cb != NULL && _cb->is_nmethod()) { 1174 cf->do_code_blob(_cb); 1175 } 1176 } 1177 1178 1179 // call f() on the interpreted Method*s in the stack. 1180 // Have to walk the entire code cache for the compiled frames Yuck. 1181 void frame::metadata_do(void f(Metadata*)) { 1182 if (_cb != NULL && Interpreter::contains(pc())) { 1183 Method* m = this->interpreter_frame_method(); 1184 assert(m != NULL, "huh?"); 1185 f(m); 1186 } 1187 } 1188 1189 void frame::gc_prologue() { 1190 if (is_interpreted_frame()) { 1191 // set bcx to bci to become Method* position independent during GC 1192 interpreter_frame_set_bcx(interpreter_frame_bci()); 1193 } 1194 } 1195 1196 1197 void frame::gc_epilogue() { 1198 if (is_interpreted_frame()) { 1199 // set bcx back to bcp for interpreter 1200 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp()); 1201 } 1202 // call processor specific epilog function 1203 pd_gc_epilog(); 1204 } 1205 1206 1207 # ifdef ENABLE_ZAP_DEAD_LOCALS 1208 1209 void frame::CheckValueClosure::do_oop(oop* p) { 1210 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) { 1211 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); 1212 } 1213 } 1214 frame::CheckValueClosure frame::_check_value; 1215 1216 1217 void frame::CheckOopClosure::do_oop(oop* p) { 1218 if (*p != NULL && !(*p)->is_oop()) { 1219 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); 1220 } 1221 } 1222 frame::CheckOopClosure frame::_check_oop; 1223 1224 void frame::check_derived_oop(oop* base, oop* derived) { 1225 _check_oop.do_oop(base); 1226 } 1227 1228 1229 void frame::ZapDeadClosure::do_oop(oop* p) { 1230 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p); 1231 *p = cast_to_oop<intptr_t>(0xbabebabe); 1232 } 1233 frame::ZapDeadClosure frame::_zap_dead; 1234 1235 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) { 1236 assert(thread == Thread::current(), "need to synchronize to do this to another thread"); 1237 // Tracing - part 1 1238 if (TraceZapDeadLocals) { 1239 ResourceMark rm(thread); 1240 tty->print_cr("--------------------------------------------------------------------------------"); 1241 tty->print("Zapping dead locals in "); 1242 print_on(tty); 1243 tty->cr(); 1244 } 1245 // Zapping 1246 if (is_entry_frame ()) zap_dead_entry_locals (thread, map); 1247 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map); 1248 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map); 1249 1250 else 1251 // could be is_runtime_frame 1252 // so remove error: ShouldNotReachHere(); 1253 ; 1254 // Tracing - part 2 1255 if (TraceZapDeadLocals) { 1256 tty->cr(); 1257 } 1258 } 1259 1260 1261 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) { 1262 // get current interpreter 'pc' 1263 assert(is_interpreted_frame(), "Not an interpreted frame"); 1264 Method* m = interpreter_frame_method(); 1265 int bci = interpreter_frame_bci(); 1266 1267 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 1268 1269 // process dynamic part 1270 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(), 1271 &_check_value); 1272 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(), 1273 &_check_oop ); 1274 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(), 1275 &_zap_dead ); 1276 1277 // get frame map 1278 InterpreterOopMap mask; 1279 m->mask_for(bci, &mask); 1280 mask.iterate_all( &oop_blk, &value_blk, &dead_blk); 1281 } 1282 1283 1284 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) { 1285 1286 ResourceMark rm(thread); 1287 assert(_cb != NULL, "sanity check"); 1288 if (_cb->oop_maps() != NULL) { 1289 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value); 1290 } 1291 } 1292 1293 1294 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) { 1295 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented"); 1296 } 1297 1298 1299 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) { 1300 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented"); 1301 } 1302 1303 # endif // ENABLE_ZAP_DEAD_LOCALS 1304 1305 void frame::verify(const RegisterMap* map) { 1306 // for now make sure receiver type is correct 1307 if (is_interpreted_frame()) { 1308 Method* method = interpreter_frame_method(); 1309 guarantee(method->is_method(), "method is wrong in frame::verify"); 1310 if (!method->is_static()) { 1311 // fetch the receiver 1312 oop* p = (oop*) interpreter_frame_local_at(0); 1313 // make sure we have the right receiver type 1314 } 1315 } 1316 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");) 1317 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false); 1318 } 1319 1320 1321 #ifdef ASSERT 1322 bool frame::verify_return_pc(address x) { 1323 if (StubRoutines::returns_to_call_stub(x)) { 1324 return true; 1325 } 1326 if (CodeCache::contains(x)) { 1327 return true; 1328 } 1329 if (Interpreter::contains(x)) { 1330 return true; 1331 } 1332 return false; 1333 } 1334 #endif 1335 1336 #ifdef ASSERT 1337 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { 1338 assert(is_interpreted_frame(), "Not an interpreted frame"); 1339 // verify that the value is in the right part of the frame 1340 address low_mark = (address) interpreter_frame_monitor_end(); 1341 address high_mark = (address) interpreter_frame_monitor_begin(); 1342 address current = (address) value; 1343 1344 const int monitor_size = frame::interpreter_frame_monitor_size(); 1345 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); 1346 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); 1347 1348 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); 1349 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); 1350 } 1351 #endif 1352 1353 #ifndef PRODUCT 1354 void frame::describe(FrameValues& values, int frame_no) { 1355 // boundaries: sp and the 'real' frame pointer 1356 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1); 1357 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp() 1358 1359 // print frame info at the highest boundary 1360 intptr_t* info_address = MAX2(sp(), frame_pointer); 1361 1362 if (info_address != frame_pointer) { 1363 // print frame_pointer explicitly if not marked by the frame info 1364 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1); 1365 } 1366 1367 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) { 1368 // Label values common to most frames 1369 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no)); 1370 } 1371 1372 if (is_interpreted_frame()) { 1373 Method* m = interpreter_frame_method(); 1374 int bci = interpreter_frame_bci(); 1375 1376 // Label the method and current bci 1377 values.describe(-1, info_address, 1378 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2); 1379 values.describe(-1, info_address, 1380 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1); 1381 if (m->max_locals() > 0) { 1382 intptr_t* l0 = interpreter_frame_local_at(0); 1383 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1); 1384 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1); 1385 // Report each local and mark as owned by this frame 1386 for (int l = 0; l < m->max_locals(); l++) { 1387 intptr_t* l0 = interpreter_frame_local_at(l); 1388 values.describe(frame_no, l0, err_msg("local %d", l)); 1389 } 1390 } 1391 1392 // Compute the actual expression stack size 1393 InterpreterOopMap mask; 1394 OopMapCache::compute_one_oop_map(m, bci, &mask); 1395 intptr_t* tos = NULL; 1396 // Report each stack element and mark as owned by this frame 1397 for (int e = 0; e < mask.expression_stack_size(); e++) { 1398 tos = MAX2(tos, interpreter_frame_expression_stack_at(e)); 1399 values.describe(frame_no, interpreter_frame_expression_stack_at(e), 1400 err_msg("stack %d", e)); 1401 } 1402 if (tos != NULL) { 1403 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1); 1404 } 1405 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) { 1406 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin"); 1407 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end"); 1408 } 1409 } else if (is_entry_frame()) { 1410 // For now just label the frame 1411 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2); 1412 } else if (is_compiled_frame()) { 1413 // For now just label the frame 1414 nmethod* nm = cb()->as_nmethod_or_null(); 1415 values.describe(-1, info_address, 1416 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no, 1417 nm, nm->method()->name_and_sig_as_C_string(), 1418 (_deopt_state == is_deoptimized) ? 1419 " (deoptimized)" : 1420 ((_deopt_state == unknown) ? " (state unknown)" : "")), 1421 2); 1422 } else if (is_native_frame()) { 1423 // For now just label the frame 1424 nmethod* nm = cb()->as_nmethod_or_null(); 1425 values.describe(-1, info_address, 1426 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no, 1427 nm, nm->method()->name_and_sig_as_C_string()), 2); 1428 } else { 1429 // provide default info if not handled before 1430 char *info = (char *) "special frame"; 1431 if ((_cb != NULL) && 1432 (_cb->name() != NULL)) { 1433 info = (char *)_cb->name(); 1434 } 1435 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2); 1436 } 1437 1438 // platform dependent additional data 1439 describe_pd(values, frame_no); 1440 } 1441 1442 #endif 1443 1444 1445 //----------------------------------------------------------------------------------- 1446 // StackFrameStream implementation 1447 1448 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) { 1449 assert(thread->has_last_Java_frame(), "sanity check"); 1450 _fr = thread->last_frame(); 1451 _is_done = false; 1452 } 1453 1454 1455 #ifndef PRODUCT 1456 1457 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) { 1458 FrameValue fv; 1459 fv.location = location; 1460 fv.owner = owner; 1461 fv.priority = priority; 1462 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1); 1463 strcpy(fv.description, description); 1464 _values.append(fv); 1465 } 1466 1467 1468 #ifdef ASSERT 1469 void FrameValues::validate() { 1470 _values.sort(compare); 1471 bool error = false; 1472 FrameValue prev; 1473 prev.owner = -1; 1474 for (int i = _values.length() - 1; i >= 0; i--) { 1475 FrameValue fv = _values.at(i); 1476 if (fv.owner == -1) continue; 1477 if (prev.owner == -1) { 1478 prev = fv; 1479 continue; 1480 } 1481 if (prev.location == fv.location) { 1482 if (fv.owner != prev.owner) { 1483 tty->print_cr("overlapping storage"); 1484 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description); 1485 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description); 1486 error = true; 1487 } 1488 } else { 1489 prev = fv; 1490 } 1491 } 1492 assert(!error, "invalid layout"); 1493 } 1494 #endif // ASSERT 1495 1496 void FrameValues::print(JavaThread* thread) { 1497 _values.sort(compare); 1498 1499 // Sometimes values like the fp can be invalid values if the 1500 // register map wasn't updated during the walk. Trim out values 1501 // that aren't actually in the stack of the thread. 1502 int min_index = 0; 1503 int max_index = _values.length() - 1; 1504 intptr_t* v0 = _values.at(min_index).location; 1505 intptr_t* v1 = _values.at(max_index).location; 1506 1507 if (thread == Thread::current()) { 1508 while (!thread->is_in_stack((address)v0)) { 1509 v0 = _values.at(++min_index).location; 1510 } 1511 while (!thread->is_in_stack((address)v1)) { 1512 v1 = _values.at(--max_index).location; 1513 } 1514 } else { 1515 while (!thread->on_local_stack((address)v0)) { 1516 v0 = _values.at(++min_index).location; 1517 } 1518 while (!thread->on_local_stack((address)v1)) { 1519 v1 = _values.at(--max_index).location; 1520 } 1521 } 1522 intptr_t* min = MIN2(v0, v1); 1523 intptr_t* max = MAX2(v0, v1); 1524 intptr_t* cur = max; 1525 intptr_t* last = NULL; 1526 for (int i = max_index; i >= min_index; i--) { 1527 FrameValue fv = _values.at(i); 1528 while (cur > fv.location) { 1529 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur); 1530 cur--; 1531 } 1532 if (last == fv.location) { 1533 const char* spacer = " " LP64_ONLY(" "); 1534 tty->print_cr(" %s %s %s", spacer, spacer, fv.description); 1535 } else { 1536 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description); 1537 last = fv.location; 1538 cur--; 1539 } 1540 } 1541 } 1542 1543 #endif // ndef PRODUCT