frame.cpp revision 4787:28e5aed7f3a6
1353095Skevans/* 2353095Skevans * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3353095Skevans * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4353095Skevans * 5353095Skevans * This code is free software; you can redistribute it and/or modify it 6353095Skevans * under the terms of the GNU General Public License version 2 only, as 7353095Skevans * published by the Free Software Foundation. 8370509Sgit2svn * 9370509Sgit2svn * This code is distributed in the hope that it will be useful, but WITHOUT 10353095Skevans * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11353095Skevans * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12353095Skevans * version 2 for more details (a copy is included in the LICENSE file that 13353095Skevans * accompanied this code). 14353095Skevans * 15353095Skevans * You should have received a copy of the GNU General Public License version 16353095Skevans * 2 along with this work; if not, write to the Free Software Foundation, 17353095Skevans * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18353095Skevans * 19353095Skevans * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20353095Skevans * or visit www.oracle.com if you need additional information or have any 21353095Skevans * questions. 22353095Skevans * 23353095Skevans */ 24353095Skevans 25353095Skevans#include "precompiled.hpp" 26353095Skevans#include "compiler/disassembler.hpp" 27353095Skevans#include "gc_interface/collectedHeap.inline.hpp" 28353095Skevans#include "interpreter/interpreter.hpp" 29353095Skevans#include "interpreter/oopMapCache.hpp" 30353095Skevans#include "memory/resourceArea.hpp" 31353095Skevans#include "memory/universe.inline.hpp" 32353095Skevans#include "oops/markOop.hpp" 33353095Skevans#include "oops/methodData.hpp" 34353095Skevans#include "oops/method.hpp" 35353095Skevans#include "oops/oop.inline.hpp" 36353095Skevans#include "oops/oop.inline2.hpp" 37353095Skevans#include "prims/methodHandles.hpp" 38353095Skevans#include "runtime/frame.inline.hpp" 39353095Skevans#include "runtime/handles.inline.hpp" 40353095Skevans#include "runtime/javaCalls.hpp" 41353095Skevans#include "runtime/monitorChunk.hpp" 42353095Skevans#include "runtime/sharedRuntime.hpp" 43353095Skevans#include "runtime/signature.hpp" 44353095Skevans#include "runtime/stubCodeGenerator.hpp" 45353095Skevans#include "runtime/stubRoutines.hpp" 46353095Skevans#include "utilities/decoder.hpp" 47353095Skevans 48353095Skevans#ifdef TARGET_ARCH_x86 49353095Skevans# include "nativeInst_x86.hpp" 50353095Skevans#endif 51353095Skevans#ifdef TARGET_ARCH_sparc 52353095Skevans# include "nativeInst_sparc.hpp" 53353095Skevans#endif 54353095Skevans#ifdef TARGET_ARCH_zero 55353095Skevans# include "nativeInst_zero.hpp" 56353095Skevans#endif 57353095Skevans#ifdef TARGET_ARCH_arm 58353095Skevans# include "nativeInst_arm.hpp" 59353095Skevans#endif 60353095Skevans#ifdef TARGET_ARCH_ppc 61353095Skevans# include "nativeInst_ppc.hpp" 62353095Skevans#endif 63353095Skevans 64353095SkevansRegisterMap::RegisterMap(JavaThread *thread, bool update_map) { 65353095Skevans _thread = thread; 66353095Skevans _update_map = update_map; 67353095Skevans clear(); 68353095Skevans debug_only(_update_for_id = NULL;) 69353095Skevans#ifndef PRODUCT 70353095Skevans for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL; 71353095Skevans#endif /* PRODUCT */ 72353095Skevans} 73353095Skevans 74353095SkevansRegisterMap::RegisterMap(const RegisterMap* map) { 75353095Skevans assert(map != this, "bad initialization parameter"); 76353095Skevans assert(map != NULL, "RegisterMap must be present"); 77353095Skevans _thread = map->thread(); 78353095Skevans _update_map = map->update_map(); 79353095Skevans _include_argument_oops = map->include_argument_oops(); 80353095Skevans debug_only(_update_for_id = map->_update_for_id;) 81353095Skevans pd_initialize_from(map); 82353095Skevans if (update_map()) { 83353095Skevans for(int i = 0; i < location_valid_size; i++) { 84353095Skevans LocationValidType bits = !update_map() ? 0 : map->_location_valid[i]; 85353095Skevans _location_valid[i] = bits; 86353095Skevans // for whichever bits are set, pull in the corresponding map->_location 87353095Skevans int j = i*location_valid_type_size; 88353095Skevans while (bits != 0) { 89353095Skevans if ((bits & 1) != 0) { 90353095Skevans assert(0 <= j && j < reg_count, "range check"); 91353095Skevans _location[j] = map->_location[j]; 92353095Skevans } 93353095Skevans bits >>= 1; 94353095Skevans j += 1; 95353095Skevans } 96353095Skevans } 97353095Skevans } 98353095Skevans} 99353095Skevans 100353095Skevansvoid RegisterMap::clear() { 101353095Skevans set_include_argument_oops(true); 102353095Skevans if (_update_map) { 103353095Skevans for(int i = 0; i < location_valid_size; i++) { 104353095Skevans _location_valid[i] = 0; 105353095Skevans } 106353095Skevans pd_clear(); 107353095Skevans } else { 108353095Skevans pd_initialize(); 109353095Skevans } 110353095Skevans} 111353095Skevans 112353095Skevans#ifndef PRODUCT 113353095Skevans 114353095Skevansvoid RegisterMap::print_on(outputStream* st) const { 115353095Skevans st->print_cr("Register map"); 116353095Skevans for(int i = 0; i < reg_count; i++) { 117353095Skevans 118353095Skevans VMReg r = VMRegImpl::as_VMReg(i); 119353095Skevans intptr_t* src = (intptr_t*) location(r); 120353095Skevans if (src != NULL) { 121353095Skevans 122353095Skevans r->print_on(st); 123353095Skevans st->print(" [" INTPTR_FORMAT "] = ", src); 124353095Skevans if (((uintptr_t)src & (sizeof(*src)-1)) != 0) { 125353095Skevans st->print_cr("<misaligned>"); 126353095Skevans } else { 127353095Skevans st->print_cr(INTPTR_FORMAT, *src); 128353095Skevans } 129353095Skevans } 130353095Skevans } 131353095Skevans} 132353095Skevans 133353095Skevansvoid RegisterMap::print() const { 134353095Skevans print_on(tty); 135353095Skevans} 136353095Skevans 137353095Skevans#endif 138353095Skevans// This returns the pc that if you were in the debugger you'd see. Not 139353095Skevans// the idealized value in the frame object. This undoes the magic conversion 140353095Skevans// that happens for deoptimized frames. In addition it makes the value the 141353095Skevans// hardware would want to see in the native frame. The only user (at this point) 142353095Skevans// is deoptimization. It likely no one else should ever use it. 143353095Skevans 144address frame::raw_pc() const { 145 if (is_deoptimized_frame()) { 146 nmethod* nm = cb()->as_nmethod_or_null(); 147 if (nm->is_method_handle_return(pc())) 148 return nm->deopt_mh_handler_begin() - pc_return_offset; 149 else 150 return nm->deopt_handler_begin() - pc_return_offset; 151 } else { 152 return (pc() - pc_return_offset); 153 } 154} 155 156// Change the pc in a frame object. This does not change the actual pc in 157// actual frame. To do that use patch_pc. 158// 159void frame::set_pc(address newpc ) { 160#ifdef ASSERT 161 if (_cb != NULL && _cb->is_nmethod()) { 162 assert(!((nmethod*)_cb)->is_deopt_pc(_pc), "invariant violation"); 163 } 164#endif // ASSERT 165 166 // Unsafe to use the is_deoptimzed tester after changing pc 167 _deopt_state = unknown; 168 _pc = newpc; 169 _cb = CodeCache::find_blob_unsafe(_pc); 170 171} 172 173// type testers 174bool frame::is_ignored_frame() const { 175 return false; // FIXME: some LambdaForm frames should be ignored 176} 177bool frame::is_deoptimized_frame() const { 178 assert(_deopt_state != unknown, "not answerable"); 179 return _deopt_state == is_deoptimized; 180} 181 182bool frame::is_native_frame() const { 183 return (_cb != NULL && 184 _cb->is_nmethod() && 185 ((nmethod*)_cb)->is_native_method()); 186} 187 188bool frame::is_java_frame() const { 189 if (is_interpreted_frame()) return true; 190 if (is_compiled_frame()) return true; 191 return false; 192} 193 194 195bool frame::is_compiled_frame() const { 196 if (_cb != NULL && 197 _cb->is_nmethod() && 198 ((nmethod*)_cb)->is_java_method()) { 199 return true; 200 } 201 return false; 202} 203 204 205bool frame::is_runtime_frame() const { 206 return (_cb != NULL && _cb->is_runtime_stub()); 207} 208 209bool frame::is_safepoint_blob_frame() const { 210 return (_cb != NULL && _cb->is_safepoint_stub()); 211} 212 213// testers 214 215bool frame::is_first_java_frame() const { 216 RegisterMap map(JavaThread::current(), false); // No update 217 frame s; 218 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)); 219 return s.is_first_frame(); 220} 221 222 223bool frame::entry_frame_is_first() const { 224 return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL; 225} 226 227 228bool frame::should_be_deoptimized() const { 229 if (_deopt_state == is_deoptimized || 230 !is_compiled_frame() ) return false; 231 assert(_cb != NULL && _cb->is_nmethod(), "must be an nmethod"); 232 nmethod* nm = (nmethod *)_cb; 233 if (TraceDependencies) { 234 tty->print("checking (%s) ", nm->is_marked_for_deoptimization() ? "true" : "false"); 235 nm->print_value_on(tty); 236 tty->cr(); 237 } 238 239 if( !nm->is_marked_for_deoptimization() ) 240 return false; 241 242 // If at the return point, then the frame has already been popped, and 243 // only the return needs to be executed. Don't deoptimize here. 244 return !nm->is_at_poll_return(pc()); 245} 246 247bool frame::can_be_deoptimized() const { 248 if (!is_compiled_frame()) return false; 249 nmethod* nm = (nmethod*)_cb; 250 251 if( !nm->can_be_deoptimized() ) 252 return false; 253 254 return !nm->is_at_poll_return(pc()); 255} 256 257void frame::deoptimize(JavaThread* thread) { 258 // Schedule deoptimization of an nmethod activation with this frame. 259 assert(_cb != NULL && _cb->is_nmethod(), "must be"); 260 nmethod* nm = (nmethod*)_cb; 261 262 // This is a fix for register window patching race 263 if (NeedsDeoptSuspend && Thread::current() != thread) { 264 assert(SafepointSynchronize::is_at_safepoint(), 265 "patching other threads for deopt may only occur at a safepoint"); 266 267 // It is possible especially with DeoptimizeALot/DeoptimizeRandom that 268 // we could see the frame again and ask for it to be deoptimized since 269 // it might move for a long time. That is harmless and we just ignore it. 270 if (id() == thread->must_deopt_id()) { 271 assert(thread->is_deopt_suspend(), "lost suspension"); 272 return; 273 } 274 275 // We are at a safepoint so the target thread can only be 276 // in 4 states: 277 // blocked - no problem 278 // blocked_trans - no problem (i.e. could have woken up from blocked 279 // during a safepoint). 280 // native - register window pc patching race 281 // native_trans - momentary state 282 // 283 // We could just wait out a thread in native_trans to block. 284 // Then we'd have all the issues that the safepoint code has as to 285 // whether to spin or block. It isn't worth it. Just treat it like 286 // native and be done with it. 287 // 288 // Examine the state of the thread at the start of safepoint since 289 // threads that were in native at the start of the safepoint could 290 // come to a halt during the safepoint, changing the current value 291 // of the safepoint_state. 292 JavaThreadState state = thread->safepoint_state()->orig_thread_state(); 293 if (state == _thread_in_native || state == _thread_in_native_trans) { 294 // Since we are at a safepoint the target thread will stop itself 295 // before it can return to java as long as we remain at the safepoint. 296 // Therefore we can put an additional request for the thread to stop 297 // no matter what no (like a suspend). This will cause the thread 298 // to notice it needs to do the deopt on its own once it leaves native. 299 // 300 // The only reason we must do this is because on machine with register 301 // windows we have a race with patching the return address and the 302 // window coming live as the thread returns to the Java code (but still 303 // in native mode) and then blocks. It is only this top most frame 304 // that is at risk. So in truth we could add an additional check to 305 // see if this frame is one that is at risk. 306 RegisterMap map(thread, false); 307 frame at_risk = thread->last_frame().sender(&map); 308 if (id() == at_risk.id()) { 309 thread->set_must_deopt_id(id()); 310 thread->set_deopt_suspend(); 311 return; 312 } 313 } 314 } // NeedsDeoptSuspend 315 316 317 // If the call site is a MethodHandle call site use the MH deopt 318 // handler. 319 address deopt = nm->is_method_handle_return(pc()) ? 320 nm->deopt_mh_handler_begin() : 321 nm->deopt_handler_begin(); 322 323 // Save the original pc before we patch in the new one 324 nm->set_original_pc(this, pc()); 325 patch_pc(thread, deopt); 326 327#ifdef ASSERT 328 { 329 RegisterMap map(thread, false); 330 frame check = thread->last_frame(); 331 while (id() != check.id()) { 332 check = check.sender(&map); 333 } 334 assert(check.is_deoptimized_frame(), "missed deopt"); 335 } 336#endif // ASSERT 337} 338 339frame frame::java_sender() const { 340 RegisterMap map(JavaThread::current(), false); 341 frame s; 342 for (s = sender(&map); !(s.is_java_frame() || s.is_first_frame()); s = s.sender(&map)) ; 343 guarantee(s.is_java_frame(), "tried to get caller of first java frame"); 344 return s; 345} 346 347frame frame::real_sender(RegisterMap* map) const { 348 frame result = sender(map); 349 while (result.is_runtime_frame() || 350 result.is_ignored_frame()) { 351 result = result.sender(map); 352 } 353 return result; 354} 355 356// Note: called by profiler - NOT for current thread 357frame frame::profile_find_Java_sender_frame(JavaThread *thread) { 358// If we don't recognize this frame, walk back up the stack until we do 359 RegisterMap map(thread, false); 360 frame first_java_frame = frame(); 361 362 // Find the first Java frame on the stack starting with input frame 363 if (is_java_frame()) { 364 // top frame is compiled frame or deoptimized frame 365 first_java_frame = *this; 366 } else if (safe_for_sender(thread)) { 367 for (frame sender_frame = sender(&map); 368 sender_frame.safe_for_sender(thread) && !sender_frame.is_first_frame(); 369 sender_frame = sender_frame.sender(&map)) { 370 if (sender_frame.is_java_frame()) { 371 first_java_frame = sender_frame; 372 break; 373 } 374 } 375 } 376 return first_java_frame; 377} 378 379// Interpreter frames 380 381 382void frame::interpreter_frame_set_locals(intptr_t* locs) { 383 assert(is_interpreted_frame(), "Not an interpreted frame"); 384 *interpreter_frame_locals_addr() = locs; 385} 386 387Method* frame::interpreter_frame_method() const { 388 assert(is_interpreted_frame(), "interpreted frame expected"); 389 Method* m = *interpreter_frame_method_addr(); 390 assert(m->is_metadata(), "bad Method* in interpreter frame"); 391 assert(m->is_method(), "not a Method*"); 392 return m; 393} 394 395void frame::interpreter_frame_set_method(Method* method) { 396 assert(is_interpreted_frame(), "interpreted frame expected"); 397 *interpreter_frame_method_addr() = method; 398} 399 400void frame::interpreter_frame_set_bcx(intptr_t bcx) { 401 assert(is_interpreted_frame(), "Not an interpreted frame"); 402 if (ProfileInterpreter) { 403 bool formerly_bci = is_bci(interpreter_frame_bcx()); 404 bool is_now_bci = is_bci(bcx); 405 *interpreter_frame_bcx_addr() = bcx; 406 407 intptr_t mdx = interpreter_frame_mdx(); 408 409 if (mdx != 0) { 410 if (formerly_bci) { 411 if (!is_now_bci) { 412 // The bcx was just converted from bci to bcp. 413 // Convert the mdx in parallel. 414 MethodData* mdo = interpreter_frame_method()->method_data(); 415 assert(mdo != NULL, ""); 416 int mdi = mdx - 1; // We distinguish valid mdi from zero by adding one. 417 address mdp = mdo->di_to_dp(mdi); 418 interpreter_frame_set_mdx((intptr_t)mdp); 419 } 420 } else { 421 if (is_now_bci) { 422 // The bcx was just converted from bcp to bci. 423 // Convert the mdx in parallel. 424 MethodData* mdo = interpreter_frame_method()->method_data(); 425 assert(mdo != NULL, ""); 426 int mdi = mdo->dp_to_di((address)mdx); 427 interpreter_frame_set_mdx((intptr_t)mdi + 1); // distinguish valid from 0. 428 } 429 } 430 } 431 } else { 432 *interpreter_frame_bcx_addr() = bcx; 433 } 434} 435 436jint frame::interpreter_frame_bci() const { 437 assert(is_interpreted_frame(), "interpreted frame expected"); 438 intptr_t bcx = interpreter_frame_bcx(); 439 return is_bci(bcx) ? bcx : interpreter_frame_method()->bci_from((address)bcx); 440} 441 442void frame::interpreter_frame_set_bci(jint bci) { 443 assert(is_interpreted_frame(), "interpreted frame expected"); 444 assert(!is_bci(interpreter_frame_bcx()), "should not set bci during GC"); 445 interpreter_frame_set_bcx((intptr_t)interpreter_frame_method()->bcp_from(bci)); 446} 447 448address frame::interpreter_frame_bcp() const { 449 assert(is_interpreted_frame(), "interpreted frame expected"); 450 intptr_t bcx = interpreter_frame_bcx(); 451 return is_bci(bcx) ? interpreter_frame_method()->bcp_from(bcx) : (address)bcx; 452} 453 454void frame::interpreter_frame_set_bcp(address bcp) { 455 assert(is_interpreted_frame(), "interpreted frame expected"); 456 assert(!is_bci(interpreter_frame_bcx()), "should not set bcp during GC"); 457 interpreter_frame_set_bcx((intptr_t)bcp); 458} 459 460void frame::interpreter_frame_set_mdx(intptr_t mdx) { 461 assert(is_interpreted_frame(), "Not an interpreted frame"); 462 assert(ProfileInterpreter, "must be profiling interpreter"); 463 *interpreter_frame_mdx_addr() = mdx; 464} 465 466address frame::interpreter_frame_mdp() const { 467 assert(ProfileInterpreter, "must be profiling interpreter"); 468 assert(is_interpreted_frame(), "interpreted frame expected"); 469 intptr_t bcx = interpreter_frame_bcx(); 470 intptr_t mdx = interpreter_frame_mdx(); 471 472 assert(!is_bci(bcx), "should not access mdp during GC"); 473 return (address)mdx; 474} 475 476void frame::interpreter_frame_set_mdp(address mdp) { 477 assert(is_interpreted_frame(), "interpreted frame expected"); 478 if (mdp == NULL) { 479 // Always allow the mdp to be cleared. 480 interpreter_frame_set_mdx((intptr_t)mdp); 481 } 482 intptr_t bcx = interpreter_frame_bcx(); 483 assert(!is_bci(bcx), "should not set mdp during GC"); 484 interpreter_frame_set_mdx((intptr_t)mdp); 485} 486 487BasicObjectLock* frame::next_monitor_in_interpreter_frame(BasicObjectLock* current) const { 488 assert(is_interpreted_frame(), "Not an interpreted frame"); 489#ifdef ASSERT 490 interpreter_frame_verify_monitor(current); 491#endif 492 BasicObjectLock* next = (BasicObjectLock*) (((intptr_t*) current) + interpreter_frame_monitor_size()); 493 return next; 494} 495 496BasicObjectLock* frame::previous_monitor_in_interpreter_frame(BasicObjectLock* current) const { 497 assert(is_interpreted_frame(), "Not an interpreted frame"); 498#ifdef ASSERT 499// // This verification needs to be checked before being enabled 500// interpreter_frame_verify_monitor(current); 501#endif 502 BasicObjectLock* previous = (BasicObjectLock*) (((intptr_t*) current) - interpreter_frame_monitor_size()); 503 return previous; 504} 505 506// Interpreter locals and expression stack locations. 507 508intptr_t* frame::interpreter_frame_local_at(int index) const { 509 const int n = Interpreter::local_offset_in_bytes(index)/wordSize; 510 return &((*interpreter_frame_locals_addr())[n]); 511} 512 513intptr_t* frame::interpreter_frame_expression_stack_at(jint offset) const { 514 const int i = offset * interpreter_frame_expression_stack_direction(); 515 const int n = i * Interpreter::stackElementWords; 516 return &(interpreter_frame_expression_stack()[n]); 517} 518 519jint frame::interpreter_frame_expression_stack_size() const { 520 // Number of elements on the interpreter expression stack 521 // Callers should span by stackElementWords 522 int element_size = Interpreter::stackElementWords; 523 if (frame::interpreter_frame_expression_stack_direction() < 0) { 524 return (interpreter_frame_expression_stack() - 525 interpreter_frame_tos_address() + 1)/element_size; 526 } else { 527 return (interpreter_frame_tos_address() - 528 interpreter_frame_expression_stack() + 1)/element_size; 529 } 530} 531 532 533// (frame::interpreter_frame_sender_sp accessor is in frame_<arch>.cpp) 534 535const char* frame::print_name() const { 536 if (is_native_frame()) return "Native"; 537 if (is_interpreted_frame()) return "Interpreted"; 538 if (is_compiled_frame()) { 539 if (is_deoptimized_frame()) return "Deoptimized"; 540 return "Compiled"; 541 } 542 if (sp() == NULL) return "Empty"; 543 return "C"; 544} 545 546void frame::print_value_on(outputStream* st, JavaThread *thread) const { 547 NOT_PRODUCT(address begin = pc()-40;) 548 NOT_PRODUCT(address end = NULL;) 549 550 st->print("%s frame (sp=" INTPTR_FORMAT " unextended sp=" INTPTR_FORMAT, print_name(), sp(), unextended_sp()); 551 if (sp() != NULL) 552 st->print(", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT, fp(), pc()); 553 554 if (StubRoutines::contains(pc())) { 555 st->print_cr(")"); 556 st->print("("); 557 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 558 st->print("~Stub::%s", desc->name()); 559 NOT_PRODUCT(begin = desc->begin(); end = desc->end();) 560 } else if (Interpreter::contains(pc())) { 561 st->print_cr(")"); 562 st->print("("); 563 InterpreterCodelet* desc = Interpreter::codelet_containing(pc()); 564 if (desc != NULL) { 565 st->print("~"); 566 desc->print_on(st); 567 NOT_PRODUCT(begin = desc->code_begin(); end = desc->code_end();) 568 } else { 569 st->print("~interpreter"); 570 } 571 } 572 st->print_cr(")"); 573 574 if (_cb != NULL) { 575 st->print(" "); 576 _cb->print_value_on(st); 577 st->cr(); 578#ifndef PRODUCT 579 if (end == NULL) { 580 begin = _cb->code_begin(); 581 end = _cb->code_end(); 582 } 583#endif 584 } 585 NOT_PRODUCT(if (WizardMode && Verbose) Disassembler::decode(begin, end);) 586} 587 588 589void frame::print_on(outputStream* st) const { 590 print_value_on(st,NULL); 591 if (is_interpreted_frame()) { 592 interpreter_frame_print_on(st); 593 } 594} 595 596 597void frame::interpreter_frame_print_on(outputStream* st) const { 598#ifndef PRODUCT 599 assert(is_interpreted_frame(), "Not an interpreted frame"); 600 jint i; 601 for (i = 0; i < interpreter_frame_method()->max_locals(); i++ ) { 602 intptr_t x = *interpreter_frame_local_at(i); 603 st->print(" - local [" INTPTR_FORMAT "]", x); 604 st->fill_to(23); 605 st->print_cr("; #%d", i); 606 } 607 for (i = interpreter_frame_expression_stack_size() - 1; i >= 0; --i ) { 608 intptr_t x = *interpreter_frame_expression_stack_at(i); 609 st->print(" - stack [" INTPTR_FORMAT "]", x); 610 st->fill_to(23); 611 st->print_cr("; #%d", i); 612 } 613 // locks for synchronization 614 for (BasicObjectLock* current = interpreter_frame_monitor_end(); 615 current < interpreter_frame_monitor_begin(); 616 current = next_monitor_in_interpreter_frame(current)) { 617 st->print(" - obj ["); 618 current->obj()->print_value_on(st); 619 st->print_cr("]"); 620 st->print(" - lock ["); 621 current->lock()->print_on(st); 622 st->print_cr("]"); 623 } 624 // monitor 625 st->print_cr(" - monitor[" INTPTR_FORMAT "]", interpreter_frame_monitor_begin()); 626 // bcp 627 st->print(" - bcp [" INTPTR_FORMAT "]", interpreter_frame_bcp()); 628 st->fill_to(23); 629 st->print_cr("; @%d", interpreter_frame_bci()); 630 // locals 631 st->print_cr(" - locals [" INTPTR_FORMAT "]", interpreter_frame_local_at(0)); 632 // method 633 st->print(" - method [" INTPTR_FORMAT "]", (address)interpreter_frame_method()); 634 st->fill_to(23); 635 st->print("; "); 636 interpreter_frame_method()->print_name(st); 637 st->cr(); 638#endif 639} 640 641// Return whether the frame is in the VM or os indicating a Hotspot problem. 642// Otherwise, it's likely a bug in the native library that the Java code calls, 643// hopefully indicating where to submit bugs. 644static void print_C_frame(outputStream* st, char* buf, int buflen, address pc) { 645 // C/C++ frame 646 bool in_vm = os::address_is_in_vm(pc); 647 st->print(in_vm ? "V" : "C"); 648 649 int offset; 650 bool found; 651 652 // libname 653 found = os::dll_address_to_library_name(pc, buf, buflen, &offset); 654 if (found) { 655 // skip directory names 656 const char *p1, *p2; 657 p1 = buf; 658 int len = (int)strlen(os::file_separator()); 659 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 660 st->print(" [%s+0x%x]", p1, offset); 661 } else { 662 st->print(" " PTR_FORMAT, pc); 663 } 664 665 // function name - os::dll_address_to_function_name() may return confusing 666 // names if pc is within jvm.dll or libjvm.so, because JVM only has 667 // JVM_xxxx and a few other symbols in the dynamic symbol table. Do this 668 // only for native libraries. 669 if (!in_vm || Decoder::can_decode_C_frame_in_vm()) { 670 found = os::dll_address_to_function_name(pc, buf, buflen, &offset); 671 672 if (found) { 673 st->print(" %s+0x%x", buf, offset); 674 } 675 } 676} 677 678// frame::print_on_error() is called by fatal error handler. Notice that we may 679// crash inside this function if stack frame is corrupted. The fatal error 680// handler can catch and handle the crash. Here we assume the frame is valid. 681// 682// First letter indicates type of the frame: 683// J: Java frame (compiled) 684// j: Java frame (interpreted) 685// V: VM frame (C/C++) 686// v: Other frames running VM generated code (e.g. stubs, adapters, etc.) 687// C: C/C++ frame 688// 689// We don't need detailed frame type as that in frame::print_name(). "C" 690// suggests the problem is in user lib; everything else is likely a VM bug. 691 692void frame::print_on_error(outputStream* st, char* buf, int buflen, bool verbose) const { 693 if (_cb != NULL) { 694 if (Interpreter::contains(pc())) { 695 Method* m = this->interpreter_frame_method(); 696 if (m != NULL) { 697 m->name_and_sig_as_C_string(buf, buflen); 698 st->print("j %s", buf); 699 st->print("+%d", this->interpreter_frame_bci()); 700 } else { 701 st->print("j " PTR_FORMAT, pc()); 702 } 703 } else if (StubRoutines::contains(pc())) { 704 StubCodeDesc* desc = StubCodeDesc::desc_for(pc()); 705 if (desc != NULL) { 706 st->print("v ~StubRoutines::%s", desc->name()); 707 } else { 708 st->print("v ~StubRoutines::" PTR_FORMAT, pc()); 709 } 710 } else if (_cb->is_buffer_blob()) { 711 st->print("v ~BufferBlob::%s", ((BufferBlob *)_cb)->name()); 712 } else if (_cb->is_nmethod()) { 713 Method* m = ((nmethod *)_cb)->method(); 714 if (m != NULL) { 715 m->name_and_sig_as_C_string(buf, buflen); 716 st->print("J %s", buf); 717 } else { 718 st->print("J " PTR_FORMAT, pc()); 719 } 720 } else if (_cb->is_runtime_stub()) { 721 st->print("v ~RuntimeStub::%s", ((RuntimeStub *)_cb)->name()); 722 } else if (_cb->is_deoptimization_stub()) { 723 st->print("v ~DeoptimizationBlob"); 724 } else if (_cb->is_exception_stub()) { 725 st->print("v ~ExceptionBlob"); 726 } else if (_cb->is_safepoint_stub()) { 727 st->print("v ~SafepointBlob"); 728 } else { 729 st->print("v blob " PTR_FORMAT, pc()); 730 } 731 } else { 732 print_C_frame(st, buf, buflen, pc()); 733 } 734} 735 736 737/* 738 The interpreter_frame_expression_stack_at method in the case of SPARC needs the 739 max_stack value of the method in order to compute the expression stack address. 740 It uses the Method* in order to get the max_stack value but during GC this 741 Method* value saved on the frame is changed by reverse_and_push and hence cannot 742 be used. So we save the max_stack value in the FrameClosure object and pass it 743 down to the interpreter_frame_expression_stack_at method 744*/ 745class InterpreterFrameClosure : public OffsetClosure { 746 private: 747 frame* _fr; 748 OopClosure* _f; 749 int _max_locals; 750 int _max_stack; 751 752 public: 753 InterpreterFrameClosure(frame* fr, int max_locals, int max_stack, 754 OopClosure* f) { 755 _fr = fr; 756 _max_locals = max_locals; 757 _max_stack = max_stack; 758 _f = f; 759 } 760 761 void offset_do(int offset) { 762 oop* addr; 763 if (offset < _max_locals) { 764 addr = (oop*) _fr->interpreter_frame_local_at(offset); 765 assert((intptr_t*)addr >= _fr->sp(), "must be inside the frame"); 766 _f->do_oop(addr); 767 } else { 768 addr = (oop*) _fr->interpreter_frame_expression_stack_at((offset - _max_locals)); 769 // In case of exceptions, the expression stack is invalid and the esp will be reset to express 770 // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). 771 bool in_stack; 772 if (frame::interpreter_frame_expression_stack_direction() > 0) { 773 in_stack = (intptr_t*)addr <= _fr->interpreter_frame_tos_address(); 774 } else { 775 in_stack = (intptr_t*)addr >= _fr->interpreter_frame_tos_address(); 776 } 777 if (in_stack) { 778 _f->do_oop(addr); 779 } 780 } 781 } 782 783 int max_locals() { return _max_locals; } 784 frame* fr() { return _fr; } 785}; 786 787 788class InterpretedArgumentOopFinder: public SignatureInfo { 789 private: 790 OopClosure* _f; // Closure to invoke 791 int _offset; // TOS-relative offset, decremented with each argument 792 bool _has_receiver; // true if the callee has a receiver 793 frame* _fr; 794 795 void set(int size, BasicType type) { 796 _offset -= size; 797 if (type == T_OBJECT || type == T_ARRAY) oop_offset_do(); 798 } 799 800 void oop_offset_do() { 801 oop* addr; 802 addr = (oop*)_fr->interpreter_frame_tos_at(_offset); 803 _f->do_oop(addr); 804 } 805 806 public: 807 InterpretedArgumentOopFinder(Symbol* signature, bool has_receiver, frame* fr, OopClosure* f) : SignatureInfo(signature), _has_receiver(has_receiver) { 808 // compute size of arguments 809 int args_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0); 810 assert(!fr->is_interpreted_frame() || 811 args_size <= fr->interpreter_frame_expression_stack_size(), 812 "args cannot be on stack anymore"); 813 // initialize InterpretedArgumentOopFinder 814 _f = f; 815 _fr = fr; 816 _offset = args_size; 817 } 818 819 void oops_do() { 820 if (_has_receiver) { 821 --_offset; 822 oop_offset_do(); 823 } 824 iterate_parameters(); 825 } 826}; 827 828 829// Entry frame has following form (n arguments) 830// +-----------+ 831// sp -> | last arg | 832// +-----------+ 833// : ::: : 834// +-----------+ 835// (sp+n)->| first arg| 836// +-----------+ 837 838 839 840// visits and GC's all the arguments in entry frame 841class EntryFrameOopFinder: public SignatureInfo { 842 private: 843 bool _is_static; 844 int _offset; 845 frame* _fr; 846 OopClosure* _f; 847 848 void set(int size, BasicType type) { 849 assert (_offset >= 0, "illegal offset"); 850 if (type == T_OBJECT || type == T_ARRAY) oop_at_offset_do(_offset); 851 _offset -= size; 852 } 853 854 void oop_at_offset_do(int offset) { 855 assert (offset >= 0, "illegal offset"); 856 oop* addr = (oop*) _fr->entry_frame_argument_at(offset); 857 _f->do_oop(addr); 858 } 859 860 public: 861 EntryFrameOopFinder(frame* frame, Symbol* signature, bool is_static) : SignatureInfo(signature) { 862 _f = NULL; // will be set later 863 _fr = frame; 864 _is_static = is_static; 865 _offset = ArgumentSizeComputer(signature).size() - 1; // last parameter is at index 0 866 } 867 868 void arguments_do(OopClosure* f) { 869 _f = f; 870 if (!_is_static) oop_at_offset_do(_offset+1); // do the receiver 871 iterate_parameters(); 872 } 873 874}; 875 876oop* frame::interpreter_callee_receiver_addr(Symbol* signature) { 877 ArgumentSizeComputer asc(signature); 878 int size = asc.size(); 879 return (oop *)interpreter_frame_tos_at(size); 880} 881 882 883void frame::oops_interpreted_do(OopClosure* f, CLDToOopClosure* cld_f, 884 const RegisterMap* map, bool query_oop_map_cache) { 885 assert(is_interpreted_frame(), "Not an interpreted frame"); 886 assert(map != NULL, "map must be set"); 887 Thread *thread = Thread::current(); 888 methodHandle m (thread, interpreter_frame_method()); 889 jint bci = interpreter_frame_bci(); 890 891 assert(!Universe::heap()->is_in(m()), 892 "must be valid oop"); 893 assert(m->is_method(), "checking frame value"); 894 assert((m->is_native() && bci == 0) || 895 (!m->is_native() && bci >= 0 && bci < m->code_size()), 896 "invalid bci value"); 897 898 // Handle the monitor elements in the activation 899 for ( 900 BasicObjectLock* current = interpreter_frame_monitor_end(); 901 current < interpreter_frame_monitor_begin(); 902 current = next_monitor_in_interpreter_frame(current) 903 ) { 904#ifdef ASSERT 905 interpreter_frame_verify_monitor(current); 906#endif 907 current->oops_do(f); 908 } 909 910 // process fixed part 911 if (cld_f != NULL) { 912 // The method pointer in the frame might be the only path to the method's 913 // klass, and the klass needs to be kept alive while executing. The GCs 914 // don't trace through method pointers, so typically in similar situations 915 // the mirror or the class loader of the klass are installed as a GC root. 916 // To minimze the overhead of doing that here, we ask the GC to pass down a 917 // closure that knows how to keep klasses alive given a ClassLoaderData. 918 cld_f->do_cld(m->method_holder()->class_loader_data()); 919 } 920 921#if !defined(PPC) || defined(ZERO) 922 if (m->is_native()) { 923#ifdef CC_INTERP 924 interpreterState istate = get_interpreterState(); 925 f->do_oop((oop*)&istate->_oop_temp); 926#else 927 f->do_oop((oop*)( fp() + interpreter_frame_oop_temp_offset )); 928#endif /* CC_INTERP */ 929 } 930#else // PPC 931 if (m->is_native() && m->is_static()) { 932 f->do_oop(interpreter_frame_mirror_addr()); 933 } 934#endif // PPC 935 936 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 937 938 Symbol* signature = NULL; 939 bool has_receiver = false; 940 941 // Process a callee's arguments if we are at a call site 942 // (i.e., if we are at an invoke bytecode) 943 // This is used sometimes for calling into the VM, not for another 944 // interpreted or compiled frame. 945 if (!m->is_native()) { 946 Bytecode_invoke call = Bytecode_invoke_check(m, bci); 947 if (call.is_valid()) { 948 signature = call.signature(); 949 has_receiver = call.has_receiver(); 950 if (map->include_argument_oops() && 951 interpreter_frame_expression_stack_size() > 0) { 952 ResourceMark rm(thread); // is this right ??? 953 // we are at a call site & the expression stack is not empty 954 // => process callee's arguments 955 // 956 // Note: The expression stack can be empty if an exception 957 // occurred during method resolution/execution. In all 958 // cases we empty the expression stack completely be- 959 // fore handling the exception (the exception handling 960 // code in the interpreter calls a blocking runtime 961 // routine which can cause this code to be executed). 962 // (was bug gri 7/27/98) 963 oops_interpreted_arguments_do(signature, has_receiver, f); 964 } 965 } 966 } 967 968 InterpreterFrameClosure blk(this, max_locals, m->max_stack(), f); 969 970 // process locals & expression stack 971 InterpreterOopMap mask; 972 if (query_oop_map_cache) { 973 m->mask_for(bci, &mask); 974 } else { 975 OopMapCache::compute_one_oop_map(m, bci, &mask); 976 } 977 mask.iterate_oop(&blk); 978} 979 980 981void frame::oops_interpreted_arguments_do(Symbol* signature, bool has_receiver, OopClosure* f) { 982 InterpretedArgumentOopFinder finder(signature, has_receiver, this, f); 983 finder.oops_do(); 984} 985 986void frame::oops_code_blob_do(OopClosure* f, CodeBlobClosure* cf, const RegisterMap* reg_map) { 987 assert(_cb != NULL, "sanity check"); 988 if (_cb->oop_maps() != NULL) { 989 OopMapSet::oops_do(this, reg_map, f); 990 991 // Preserve potential arguments for a callee. We handle this by dispatching 992 // on the codeblob. For c2i, we do 993 if (reg_map->include_argument_oops()) { 994 _cb->preserve_callee_argument_oops(*this, reg_map, f); 995 } 996 } 997 // In cases where perm gen is collected, GC will want to mark 998 // oops referenced from nmethods active on thread stacks so as to 999 // prevent them from being collected. However, this visit should be 1000 // restricted to certain phases of the collection only. The 1001 // closure decides how it wants nmethods to be traced. 1002 if (cf != NULL) 1003 cf->do_code_blob(_cb); 1004} 1005 1006class CompiledArgumentOopFinder: public SignatureInfo { 1007 protected: 1008 OopClosure* _f; 1009 int _offset; // the current offset, incremented with each argument 1010 bool _has_receiver; // true if the callee has a receiver 1011 bool _has_appendix; // true if the call has an appendix 1012 frame _fr; 1013 RegisterMap* _reg_map; 1014 int _arg_size; 1015 VMRegPair* _regs; // VMReg list of arguments 1016 1017 void set(int size, BasicType type) { 1018 if (type == T_OBJECT || type == T_ARRAY) handle_oop_offset(); 1019 _offset += size; 1020 } 1021 1022 virtual void handle_oop_offset() { 1023 // Extract low order register number from register array. 1024 // In LP64-land, the high-order bits are valid but unhelpful. 1025 VMReg reg = _regs[_offset].first(); 1026 oop *loc = _fr.oopmapreg_to_location(reg, _reg_map); 1027 _f->do_oop(loc); 1028 } 1029 1030 public: 1031 CompiledArgumentOopFinder(Symbol* signature, bool has_receiver, bool has_appendix, OopClosure* f, frame fr, const RegisterMap* reg_map) 1032 : SignatureInfo(signature) { 1033 1034 // initialize CompiledArgumentOopFinder 1035 _f = f; 1036 _offset = 0; 1037 _has_receiver = has_receiver; 1038 _has_appendix = has_appendix; 1039 _fr = fr; 1040 _reg_map = (RegisterMap*)reg_map; 1041 _arg_size = ArgumentSizeComputer(signature).size() + (has_receiver ? 1 : 0) + (has_appendix ? 1 : 0); 1042 1043 int arg_size; 1044 _regs = SharedRuntime::find_callee_arguments(signature, has_receiver, has_appendix, &arg_size); 1045 assert(arg_size == _arg_size, "wrong arg size"); 1046 } 1047 1048 void oops_do() { 1049 if (_has_receiver) { 1050 handle_oop_offset(); 1051 _offset++; 1052 } 1053 iterate_parameters(); 1054 if (_has_appendix) { 1055 handle_oop_offset(); 1056 _offset++; 1057 } 1058 } 1059}; 1060 1061void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) { 1062 ResourceMark rm; 1063 CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map); 1064 finder.oops_do(); 1065} 1066 1067 1068// Get receiver out of callers frame, i.e. find parameter 0 in callers 1069// frame. Consult ADLC for where parameter 0 is to be found. Then 1070// check local reg_map for it being a callee-save register or argument 1071// register, both of which are saved in the local frame. If not found 1072// there, it must be an in-stack argument of the caller. 1073// Note: caller.sp() points to callee-arguments 1074oop frame::retrieve_receiver(RegisterMap* reg_map) { 1075 frame caller = *this; 1076 1077 // First consult the ADLC on where it puts parameter 0 for this signature. 1078 VMReg reg = SharedRuntime::name_for_receiver(); 1079 oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map); 1080 if (oop_adr == NULL) { 1081 guarantee(oop_adr != NULL, "bad register save location"); 1082 return NULL; 1083 } 1084 oop r = *oop_adr; 1085 assert(Universe::heap()->is_in_or_null(r), err_msg("bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (intptr_t) r, (intptr_t) r)); 1086 return r; 1087} 1088 1089 1090oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const { 1091 if(reg->is_reg()) { 1092 // If it is passed in a register, it got spilled in the stub frame. 1093 return (oop *)reg_map->location(reg); 1094 } else { 1095 int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size; 1096 return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes); 1097 } 1098} 1099 1100BasicLock* frame::get_native_monitor() { 1101 nmethod* nm = (nmethod*)_cb; 1102 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1103 "Should not call this unless it's a native nmethod"); 1104 int byte_offset = in_bytes(nm->native_basic_lock_sp_offset()); 1105 assert(byte_offset >= 0, "should not see invalid offset"); 1106 return (BasicLock*) &sp()[byte_offset / wordSize]; 1107} 1108 1109oop frame::get_native_receiver() { 1110 nmethod* nm = (nmethod*)_cb; 1111 assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(), 1112 "Should not call this unless it's a native nmethod"); 1113 int byte_offset = in_bytes(nm->native_receiver_sp_offset()); 1114 assert(byte_offset >= 0, "should not see invalid offset"); 1115 oop owner = ((oop*) sp())[byte_offset / wordSize]; 1116 assert( Universe::heap()->is_in(owner), "bad receiver" ); 1117 return owner; 1118} 1119 1120void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) { 1121 assert(map != NULL, "map must be set"); 1122 if (map->include_argument_oops()) { 1123 // must collect argument oops, as nobody else is doing it 1124 Thread *thread = Thread::current(); 1125 methodHandle m (thread, entry_frame_call_wrapper()->callee_method()); 1126 EntryFrameOopFinder finder(this, m->signature(), m->is_static()); 1127 finder.arguments_do(f); 1128 } 1129 // Traverse the Handle Block saved in the entry frame 1130 entry_frame_call_wrapper()->oops_do(f); 1131} 1132 1133 1134void frame::oops_do_internal(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) { 1135#ifndef PRODUCT 1136 // simulate GC crash here to dump java thread in error report 1137 if (CrashGCForDumpingJavaThread) { 1138 char *t = NULL; 1139 *t = 'c'; 1140 } 1141#endif 1142 if (is_interpreted_frame()) { 1143 oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache); 1144 } else if (is_entry_frame()) { 1145 oops_entry_do(f, map); 1146 } else if (CodeCache::contains(pc())) { 1147 oops_code_blob_do(f, cf, map); 1148#ifdef SHARK 1149 } else if (is_fake_stub_frame()) { 1150 // nothing to do 1151#endif // SHARK 1152 } else { 1153 ShouldNotReachHere(); 1154 } 1155} 1156 1157void frame::nmethods_do(CodeBlobClosure* cf) { 1158 if (_cb != NULL && _cb->is_nmethod()) { 1159 cf->do_code_blob(_cb); 1160 } 1161} 1162 1163 1164// call f() on the interpreted Method*s in the stack. 1165// Have to walk the entire code cache for the compiled frames Yuck. 1166void frame::metadata_do(void f(Metadata*)) { 1167 if (_cb != NULL && Interpreter::contains(pc())) { 1168 Method* m = this->interpreter_frame_method(); 1169 assert(m != NULL, "huh?"); 1170 f(m); 1171 } 1172} 1173 1174void frame::gc_prologue() { 1175 if (is_interpreted_frame()) { 1176 // set bcx to bci to become Method* position independent during GC 1177 interpreter_frame_set_bcx(interpreter_frame_bci()); 1178 } 1179} 1180 1181 1182void frame::gc_epilogue() { 1183 if (is_interpreted_frame()) { 1184 // set bcx back to bcp for interpreter 1185 interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp()); 1186 } 1187 // call processor specific epilog function 1188 pd_gc_epilog(); 1189} 1190 1191 1192# ifdef ENABLE_ZAP_DEAD_LOCALS 1193 1194void frame::CheckValueClosure::do_oop(oop* p) { 1195 if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) { 1196 warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); 1197 } 1198} 1199frame::CheckValueClosure frame::_check_value; 1200 1201 1202void frame::CheckOopClosure::do_oop(oop* p) { 1203 if (*p != NULL && !(*p)->is_oop()) { 1204 warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current()); 1205 } 1206} 1207frame::CheckOopClosure frame::_check_oop; 1208 1209void frame::check_derived_oop(oop* base, oop* derived) { 1210 _check_oop.do_oop(base); 1211} 1212 1213 1214void frame::ZapDeadClosure::do_oop(oop* p) { 1215 if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p); 1216 // Need cast because on _LP64 the conversion to oop is ambiguous. Constant 1217 // can be either long or int. 1218 *p = (oop)(int)0xbabebabe; 1219} 1220frame::ZapDeadClosure frame::_zap_dead; 1221 1222void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) { 1223 assert(thread == Thread::current(), "need to synchronize to do this to another thread"); 1224 // Tracing - part 1 1225 if (TraceZapDeadLocals) { 1226 ResourceMark rm(thread); 1227 tty->print_cr("--------------------------------------------------------------------------------"); 1228 tty->print("Zapping dead locals in "); 1229 print_on(tty); 1230 tty->cr(); 1231 } 1232 // Zapping 1233 if (is_entry_frame ()) zap_dead_entry_locals (thread, map); 1234 else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map); 1235 else if (is_compiled_frame()) zap_dead_compiled_locals (thread, map); 1236 1237 else 1238 // could be is_runtime_frame 1239 // so remove error: ShouldNotReachHere(); 1240 ; 1241 // Tracing - part 2 1242 if (TraceZapDeadLocals) { 1243 tty->cr(); 1244 } 1245} 1246 1247 1248void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) { 1249 // get current interpreter 'pc' 1250 assert(is_interpreted_frame(), "Not an interpreted frame"); 1251 Method* m = interpreter_frame_method(); 1252 int bci = interpreter_frame_bci(); 1253 1254 int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals(); 1255 1256 // process dynamic part 1257 InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(), 1258 &_check_value); 1259 InterpreterFrameClosure oop_blk(this, max_locals, m->max_stack(), 1260 &_check_oop ); 1261 InterpreterFrameClosure dead_blk(this, max_locals, m->max_stack(), 1262 &_zap_dead ); 1263 1264 // get frame map 1265 InterpreterOopMap mask; 1266 m->mask_for(bci, &mask); 1267 mask.iterate_all( &oop_blk, &value_blk, &dead_blk); 1268} 1269 1270 1271void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) { 1272 1273 ResourceMark rm(thread); 1274 assert(_cb != NULL, "sanity check"); 1275 if (_cb->oop_maps() != NULL) { 1276 OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value); 1277 } 1278} 1279 1280 1281void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) { 1282 if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented"); 1283} 1284 1285 1286void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) { 1287 if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented"); 1288} 1289 1290# endif // ENABLE_ZAP_DEAD_LOCALS 1291 1292void frame::verify(const RegisterMap* map) { 1293 // for now make sure receiver type is correct 1294 if (is_interpreted_frame()) { 1295 Method* method = interpreter_frame_method(); 1296 guarantee(method->is_method(), "method is wrong in frame::verify"); 1297 if (!method->is_static()) { 1298 // fetch the receiver 1299 oop* p = (oop*) interpreter_frame_local_at(0); 1300 // make sure we have the right receiver type 1301 } 1302 } 1303 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");) 1304 oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false); 1305} 1306 1307 1308#ifdef ASSERT 1309bool frame::verify_return_pc(address x) { 1310 if (StubRoutines::returns_to_call_stub(x)) { 1311 return true; 1312 } 1313 if (CodeCache::contains(x)) { 1314 return true; 1315 } 1316 if (Interpreter::contains(x)) { 1317 return true; 1318 } 1319 return false; 1320} 1321#endif 1322 1323#ifdef ASSERT 1324void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const { 1325 assert(is_interpreted_frame(), "Not an interpreted frame"); 1326 // verify that the value is in the right part of the frame 1327 address low_mark = (address) interpreter_frame_monitor_end(); 1328 address high_mark = (address) interpreter_frame_monitor_begin(); 1329 address current = (address) value; 1330 1331 const int monitor_size = frame::interpreter_frame_monitor_size(); 1332 guarantee((high_mark - current) % monitor_size == 0 , "Misaligned top of BasicObjectLock*"); 1333 guarantee( high_mark > current , "Current BasicObjectLock* higher than high_mark"); 1334 1335 guarantee((current - low_mark) % monitor_size == 0 , "Misaligned bottom of BasicObjectLock*"); 1336 guarantee( current >= low_mark , "Current BasicObjectLock* below than low_mark"); 1337} 1338#endif 1339 1340#ifndef PRODUCT 1341void frame::describe(FrameValues& values, int frame_no) { 1342 // boundaries: sp and the 'real' frame pointer 1343 values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1); 1344 intptr_t* frame_pointer = real_fp(); // Note: may differ from fp() 1345 1346 // print frame info at the highest boundary 1347 intptr_t* info_address = MAX2(sp(), frame_pointer); 1348 1349 if (info_address != frame_pointer) { 1350 // print frame_pointer explicitly if not marked by the frame info 1351 values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1); 1352 } 1353 1354 if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) { 1355 // Label values common to most frames 1356 values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no)); 1357 } 1358 1359 if (is_interpreted_frame()) { 1360 Method* m = interpreter_frame_method(); 1361 int bci = interpreter_frame_bci(); 1362 1363 // Label the method and current bci 1364 values.describe(-1, info_address, 1365 FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2); 1366 values.describe(-1, info_address, 1367 err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1); 1368 if (m->max_locals() > 0) { 1369 intptr_t* l0 = interpreter_frame_local_at(0); 1370 intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1); 1371 values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1); 1372 // Report each local and mark as owned by this frame 1373 for (int l = 0; l < m->max_locals(); l++) { 1374 intptr_t* l0 = interpreter_frame_local_at(l); 1375 values.describe(frame_no, l0, err_msg("local %d", l)); 1376 } 1377 } 1378 1379 // Compute the actual expression stack size 1380 InterpreterOopMap mask; 1381 OopMapCache::compute_one_oop_map(m, bci, &mask); 1382 intptr_t* tos = NULL; 1383 // Report each stack element and mark as owned by this frame 1384 for (int e = 0; e < mask.expression_stack_size(); e++) { 1385 tos = MAX2(tos, interpreter_frame_expression_stack_at(e)); 1386 values.describe(frame_no, interpreter_frame_expression_stack_at(e), 1387 err_msg("stack %d", e)); 1388 } 1389 if (tos != NULL) { 1390 values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1); 1391 } 1392 if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) { 1393 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin"); 1394 values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end"); 1395 } 1396 } else if (is_entry_frame()) { 1397 // For now just label the frame 1398 values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2); 1399 } else if (is_compiled_frame()) { 1400 // For now just label the frame 1401 nmethod* nm = cb()->as_nmethod_or_null(); 1402 values.describe(-1, info_address, 1403 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no, 1404 nm, nm->method()->name_and_sig_as_C_string(), 1405 (_deopt_state == is_deoptimized) ? 1406 " (deoptimized)" : 1407 ((_deopt_state == unknown) ? " (state unknown)" : "")), 1408 2); 1409 } else if (is_native_frame()) { 1410 // For now just label the frame 1411 nmethod* nm = cb()->as_nmethod_or_null(); 1412 values.describe(-1, info_address, 1413 FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no, 1414 nm, nm->method()->name_and_sig_as_C_string()), 2); 1415 } else { 1416 // provide default info if not handled before 1417 char *info = (char *) "special frame"; 1418 if ((_cb != NULL) && 1419 (_cb->name() != NULL)) { 1420 info = (char *)_cb->name(); 1421 } 1422 values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2); 1423 } 1424 1425 // platform dependent additional data 1426 describe_pd(values, frame_no); 1427} 1428 1429#endif 1430 1431 1432//----------------------------------------------------------------------------------- 1433// StackFrameStream implementation 1434 1435StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) { 1436 assert(thread->has_last_Java_frame(), "sanity check"); 1437 _fr = thread->last_frame(); 1438 _is_done = false; 1439} 1440 1441 1442#ifndef PRODUCT 1443 1444void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) { 1445 FrameValue fv; 1446 fv.location = location; 1447 fv.owner = owner; 1448 fv.priority = priority; 1449 fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1); 1450 strcpy(fv.description, description); 1451 _values.append(fv); 1452} 1453 1454 1455#ifdef ASSERT 1456void FrameValues::validate() { 1457 _values.sort(compare); 1458 bool error = false; 1459 FrameValue prev; 1460 prev.owner = -1; 1461 for (int i = _values.length() - 1; i >= 0; i--) { 1462 FrameValue fv = _values.at(i); 1463 if (fv.owner == -1) continue; 1464 if (prev.owner == -1) { 1465 prev = fv; 1466 continue; 1467 } 1468 if (prev.location == fv.location) { 1469 if (fv.owner != prev.owner) { 1470 tty->print_cr("overlapping storage"); 1471 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description); 1472 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description); 1473 error = true; 1474 } 1475 } else { 1476 prev = fv; 1477 } 1478 } 1479 assert(!error, "invalid layout"); 1480} 1481#endif // ASSERT 1482 1483void FrameValues::print(JavaThread* thread) { 1484 _values.sort(compare); 1485 1486 // Sometimes values like the fp can be invalid values if the 1487 // register map wasn't updated during the walk. Trim out values 1488 // that aren't actually in the stack of the thread. 1489 int min_index = 0; 1490 int max_index = _values.length() - 1; 1491 intptr_t* v0 = _values.at(min_index).location; 1492 intptr_t* v1 = _values.at(max_index).location; 1493 1494 if (thread == Thread::current()) { 1495 while (!thread->is_in_stack((address)v0)) { 1496 v0 = _values.at(++min_index).location; 1497 } 1498 while (!thread->is_in_stack((address)v1)) { 1499 v1 = _values.at(--max_index).location; 1500 } 1501 } else { 1502 while (!thread->on_local_stack((address)v0)) { 1503 v0 = _values.at(++min_index).location; 1504 } 1505 while (!thread->on_local_stack((address)v1)) { 1506 v1 = _values.at(--max_index).location; 1507 } 1508 } 1509 intptr_t* min = MIN2(v0, v1); 1510 intptr_t* max = MAX2(v0, v1); 1511 intptr_t* cur = max; 1512 intptr_t* last = NULL; 1513 for (int i = max_index; i >= min_index; i--) { 1514 FrameValue fv = _values.at(i); 1515 while (cur > fv.location) { 1516 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur); 1517 cur--; 1518 } 1519 if (last == fv.location) { 1520 const char* spacer = " " LP64_ONLY(" "); 1521 tty->print_cr(" %s %s %s", spacer, spacer, fv.description); 1522 } else { 1523 tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description); 1524 last = fv.location; 1525 cur--; 1526 } 1527 } 1528} 1529 1530#endif // ndef PRODUCT 1531