1 /* 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 # include "incls/_precompiled.incl" 26 # include "incls/_vframe.cpp.incl" 27 28 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread) 29 : _reg_map(reg_map), _thread(thread) { 30 assert(fr != NULL, "must have frame"); 31 _fr = *fr; 32 } 33 34 vframe::vframe(const frame* fr, JavaThread* thread) 35 : _reg_map(thread), _thread(thread) { 36 assert(fr != NULL, "must have frame"); 37 _fr = *fr; 38 } 39 40 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) { 41 // Interpreter frame 42 if (f->is_interpreted_frame()) { 43 return new interpretedVFrame(f, reg_map, thread); 44 } 45 46 // Compiled frame 47 CodeBlob* cb = f->cb(); 48 if (cb != NULL) { 49 if (cb->is_nmethod()) { 50 nmethod* nm = (nmethod*)cb; 51 return new compiledVFrame(f, reg_map, thread, nm); 52 } 53 54 if (f->is_runtime_frame()) { 55 // Skip this frame and try again. 56 RegisterMap temp_map = *reg_map; 57 frame s = f->sender(&temp_map); 58 return new_vframe(&s, &temp_map, thread); 59 } 60 } 61 62 // External frame 63 return new externalVFrame(f, reg_map, thread); 64 } 65 66 vframe* vframe::sender() const { 67 RegisterMap temp_map = *register_map(); 68 assert(is_top(), "just checking"); 69 if (_fr.is_entry_frame() && _fr.is_first_frame()) return NULL; 70 frame s = _fr.real_sender(&temp_map); 71 if (s.is_first_frame()) return NULL; 72 return vframe::new_vframe(&s, &temp_map, thread()); 73 } 74 75 vframe* vframe::top() const { 76 vframe* vf = (vframe*) this; 77 while (!vf->is_top()) vf = vf->sender(); 78 return vf; 79 } 80 81 82 javaVFrame* vframe::java_sender() const { 83 vframe* f = sender(); 84 while (f != NULL) { 85 if (f->is_java_frame()) return javaVFrame::cast(f); 86 f = f->sender(); 87 } 88 return NULL; 89 } 90 91 // ------------- javaVFrame -------------- 92 93 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() { 94 assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(), 95 "must be at safepoint or it's a java frame of the current thread"); 96 97 GrowableArray<MonitorInfo*>* mons = monitors(); 98 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length()); 99 if (mons->is_empty()) return result; 100 101 bool found_first_monitor = false; 102 ObjectMonitor *pending_monitor = thread()->current_pending_monitor(); 103 ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor(); 104 oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : NULL); 105 oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : NULL); 106 107 for (int index = (mons->length()-1); index >= 0; index--) { 108 MonitorInfo* monitor = mons->at(index); 109 if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor 110 oop obj = monitor->owner(); 111 if (obj == NULL) continue; // skip unowned monitor 112 // 113 // Skip the monitor that the thread is blocked to enter or waiting on 114 // 115 if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) { 116 continue; 117 } 118 found_first_monitor = true; 119 result->append(monitor); 120 } 121 return result; 122 } 123 124 static void print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) { 125 if (obj.not_null()) { 126 st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, (address)obj()); 127 if (obj->klass() == SystemDictionary::Class_klass()) { 128 klassOop target_klass = java_lang_Class::as_klassOop(obj()); 129 st->print_cr("(a java.lang.Class for %s)", instanceKlass::cast(target_klass)->external_name()); 130 } else { 131 Klass* k = Klass::cast(obj->klass()); 132 st->print_cr("(a %s)", k->external_name()); 133 } 134 } 135 } 136 137 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) { 138 ResourceMark rm; 139 140 // If this is the first frame, and java.lang.Object.wait(...) then print out the receiver. 141 if (frame_count == 0) { 142 if (method()->name() == vmSymbols::wait_name() && 143 instanceKlass::cast(method()->method_holder())->name() == vmSymbols::java_lang_Object()) { 144 StackValueCollection* locs = locals(); 145 if (!locs->is_empty()) { 146 StackValue* sv = locs->at(0); 147 if (sv->type() == T_OBJECT) { 148 Handle o = locs->at(0)->get_obj(); 149 print_locked_object_class_name(st, o, "waiting on"); 150 } 151 } 152 } else if (thread()->current_park_blocker() != NULL) { 153 oop obj = thread()->current_park_blocker(); 154 Klass* k = Klass::cast(obj->klass()); 155 st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", (address)obj, k->external_name()); 156 } 157 } 158 159 160 // Print out all monitors that we have locked or are trying to lock 161 GrowableArray<MonitorInfo*>* mons = monitors(); 162 if (!mons->is_empty()) { 163 bool found_first_monitor = false; 164 for (int index = (mons->length()-1); index >= 0; index--) { 165 MonitorInfo* monitor = mons->at(index); 166 if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code 167 if (monitor->owner_is_scalar_replaced()) { 168 Klass* k = Klass::cast(monitor->owner_klass()); 169 st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name()); 170 } else { 171 oop obj = monitor->owner(); 172 if (obj != NULL) { 173 print_locked_object_class_name(st, obj, "eliminated"); 174 } 175 } 176 continue; 177 } 178 if (monitor->owner() != NULL) { 179 180 // First, assume we have the monitor locked. If we haven't found an 181 // owned monitor before and this is the first frame, then we need to 182 // see if we have completed the lock or we are blocked trying to 183 // acquire it - we can only be blocked if the monitor is inflated 184 185 const char *lock_state = "locked"; // assume we have the monitor locked 186 if (!found_first_monitor && frame_count == 0) { 187 markOop mark = monitor->owner()->mark(); 188 if (mark->has_monitor() && 189 mark->monitor() == thread()->current_pending_monitor()) { 190 lock_state = "waiting to lock"; 191 } 192 } 193 194 found_first_monitor = true; 195 print_locked_object_class_name(st, monitor->owner(), lock_state); 196 } 197 } 198 } 199 } 200 201 // ------------- interpretedVFrame -------------- 202 203 u_char* interpretedVFrame::bcp() const { 204 return fr().interpreter_frame_bcp(); 205 } 206 207 void interpretedVFrame::set_bcp(u_char* bcp) { 208 fr().interpreter_frame_set_bcp(bcp); 209 } 210 211 intptr_t* interpretedVFrame::locals_addr_at(int offset) const { 212 assert(fr().is_interpreted_frame(), "frame should be an interpreted frame"); 213 return fr().interpreter_frame_local_at(offset); 214 } 215 216 217 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const { 218 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5); 219 for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin())); 220 current >= fr().interpreter_frame_monitor_end(); 221 current = fr().previous_monitor_in_interpreter_frame(current)) { 222 result->push(new MonitorInfo(current->obj(), current->lock(), false, false)); 223 } 224 return result; 225 } 226 227 int interpretedVFrame::bci() const { 228 return method()->bci_from(bcp()); 229 } 230 231 methodOop interpretedVFrame::method() const { 232 return fr().interpreter_frame_method(); 233 } 234 235 StackValueCollection* interpretedVFrame::locals() const { 236 int length = method()->max_locals(); 237 238 if (method()->is_native()) { 239 // If the method is native, max_locals is not telling the truth. 240 // maxlocals then equals the size of parameters 241 length = method()->size_of_parameters(); 242 } 243 244 StackValueCollection* result = new StackValueCollection(length); 245 246 // Get oopmap describing oops and int for current bci 247 if (TaggedStackInterpreter) { 248 for(int i=0; i < length; i++) { 249 // Find stack location 250 intptr_t *addr = locals_addr_at(i); 251 252 // Depending on oop/int put it in the right package 253 StackValue *sv; 254 frame::Tag tag = fr().interpreter_frame_local_tag(i); 255 if (tag == frame::TagReference) { 256 // oop value 257 Handle h(*(oop *)addr); 258 sv = new StackValue(h); 259 } else { 260 // integer 261 sv = new StackValue(*addr); 262 } 263 assert(sv != NULL, "sanity check"); 264 result->add(sv); 265 } 266 } else { 267 InterpreterOopMap oop_mask; 268 if (TraceDeoptimization && Verbose) { 269 methodHandle m_h(thread(), method()); 270 OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask); 271 } else { 272 method()->mask_for(bci(), &oop_mask); 273 } 274 // handle locals 275 for(int i=0; i < length; i++) { 276 // Find stack location 277 intptr_t *addr = locals_addr_at(i); 278 279 // Depending on oop/int put it in the right package 280 StackValue *sv; 281 if (oop_mask.is_oop(i)) { 282 // oop value 283 Handle h(*(oop *)addr); 284 sv = new StackValue(h); 285 } else { 286 // integer 287 sv = new StackValue(*addr); 288 } 289 assert(sv != NULL, "sanity check"); 290 result->add(sv); 291 } 292 } 293 return result; 294 } 295 296 void interpretedVFrame::set_locals(StackValueCollection* values) const { 297 if (values == NULL || values->size() == 0) return; 298 299 int length = method()->max_locals(); 300 if (method()->is_native()) { 301 // If the method is native, max_locals is not telling the truth. 302 // maxlocals then equals the size of parameters 303 length = method()->size_of_parameters(); 304 } 305 306 assert(length == values->size(), "Mismatch between actual stack format and supplied data"); 307 308 // handle locals 309 for (int i = 0; i < length; i++) { 310 // Find stack location 311 intptr_t *addr = locals_addr_at(i); 312 313 // Depending on oop/int put it in the right package 314 StackValue *sv = values->at(i); 315 assert(sv != NULL, "sanity check"); 316 if (sv->type() == T_OBJECT) { 317 *(oop *) addr = (sv->get_obj())(); 318 } else { // integer 319 *addr = sv->get_int(); 320 } 321 } 322 } 323 324 StackValueCollection* interpretedVFrame::expressions() const { 325 int length = fr().interpreter_frame_expression_stack_size(); 326 if (method()->is_native()) { 327 // If the method is native, there is no expression stack 328 length = 0; 329 } 330 331 int nof_locals = method()->max_locals(); 332 StackValueCollection* result = new StackValueCollection(length); 333 334 if (TaggedStackInterpreter) { 335 // handle expressions 336 for(int i=0; i < length; i++) { 337 // Find stack location 338 intptr_t *addr = fr().interpreter_frame_expression_stack_at(i); 339 frame::Tag tag = fr().interpreter_frame_expression_stack_tag(i); 340 341 // Depending on oop/int put it in the right package 342 StackValue *sv; 343 if (tag == frame::TagReference) { 344 // oop value 345 Handle h(*(oop *)addr); 346 sv = new StackValue(h); 347 } else { 348 // otherwise 349 sv = new StackValue(*addr); 350 } 351 assert(sv != NULL, "sanity check"); 352 result->add(sv); 353 } 354 } else { 355 InterpreterOopMap oop_mask; 356 // Get oopmap describing oops and int for current bci 357 if (TraceDeoptimization && Verbose) { 358 methodHandle m_h(method()); 359 OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask); 360 } else { 361 method()->mask_for(bci(), &oop_mask); 362 } 363 // handle expressions 364 for(int i=0; i < length; i++) { 365 // Find stack location 366 intptr_t *addr = fr().interpreter_frame_expression_stack_at(i); 367 368 // Depending on oop/int put it in the right package 369 StackValue *sv; 370 if (oop_mask.is_oop(i + nof_locals)) { 371 // oop value 372 Handle h(*(oop *)addr); 373 sv = new StackValue(h); 374 } else { 375 // integer 376 sv = new StackValue(*addr); 377 } 378 assert(sv != NULL, "sanity check"); 379 result->add(sv); 380 } 381 } 382 return result; 383 } 384 385 386 // ------------- cChunk -------------- 387 388 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread) 389 : externalVFrame(fr, reg_map, thread) {} 390 391 392 void vframeStreamCommon::found_bad_method_frame() { 393 // 6379830 Cut point for an assertion that occasionally fires when 394 // we are using the performance analyzer. 395 // Disable this assert when testing the analyzer with fastdebug. 396 // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number) 397 assert(false, "invalid bci or invalid scope desc"); 398 } 399 400 // top-frame will be skipped 401 vframeStream::vframeStream(JavaThread* thread, frame top_frame, 402 bool stop_at_java_call_stub) : vframeStreamCommon(thread) { 403 _stop_at_java_call_stub = stop_at_java_call_stub; 404 405 // skip top frame, as it may not be at safepoint 406 _frame = top_frame.sender(&_reg_map); 407 while (!fill_from_frame()) { 408 _frame = _frame.sender(&_reg_map); 409 } 410 } 411 412 413 // Step back n frames, skip any pseudo frames in between. 414 // This function is used in Class.forName, Class.newInstance, Method.Invoke, 415 // AccessController.doPrivileged. 416 // 417 // NOTE that in JDK 1.4 this has been exposed to Java as 418 // sun.reflect.Reflection.getCallerClass(), which can be inlined. 419 // Inlined versions must match this routine's logic. 420 // Native method prefixing logic does not need to match since 421 // the method names don't match and inlining will not occur. 422 // See, for example, 423 // Parse::inline_native_Reflection_getCallerClass in 424 // opto/library_call.cpp. 425 void vframeStreamCommon::security_get_caller_frame(int depth) { 426 bool use_new_reflection = JDK_Version::is_gte_jdk14x_version() && UseNewReflection; 427 428 while (!at_end()) { 429 if (Universe::reflect_invoke_cache()->is_same_method(method())) { 430 // This is Method.invoke() -- skip it 431 } else if (use_new_reflection && 432 Klass::cast(method()->method_holder()) 433 ->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass())) { 434 // This is an auxilary frame -- skip it 435 } else { 436 // This is non-excluded frame, we need to count it against the depth 437 if (depth-- <= 0) { 438 // we have reached the desired depth, we are done 439 break; 440 } 441 } 442 if (method()->is_prefixed_native()) { 443 skip_prefixed_method_and_wrappers(); 444 } else { 445 next(); 446 } 447 } 448 } 449 450 451 void vframeStreamCommon::skip_prefixed_method_and_wrappers() { 452 ResourceMark rm; 453 HandleMark hm; 454 455 int method_prefix_count = 0; 456 char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count); 457 KlassHandle prefixed_klass(method()->method_holder()); 458 const char* prefixed_name = method()->name()->as_C_string(); 459 size_t prefixed_name_len = strlen(prefixed_name); 460 int prefix_index = method_prefix_count-1; 461 462 while (!at_end()) { 463 next(); 464 if (method()->method_holder() != prefixed_klass()) { 465 break; // classes don't match, can't be a wrapper 466 } 467 const char* name = method()->name()->as_C_string(); 468 size_t name_len = strlen(name); 469 size_t prefix_len = prefixed_name_len - name_len; 470 if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) { 471 break; // prefixed name isn't prefixed version of method name, can't be a wrapper 472 } 473 for (; prefix_index >= 0; --prefix_index) { 474 const char* possible_prefix = method_prefixes[prefix_index]; 475 size_t possible_prefix_len = strlen(possible_prefix); 476 if (possible_prefix_len == prefix_len && 477 strncmp(possible_prefix, prefixed_name, prefix_len) == 0) { 478 break; // matching prefix found 479 } 480 } 481 if (prefix_index < 0) { 482 break; // didn't find the prefix, can't be a wrapper 483 } 484 prefixed_name = name; 485 prefixed_name_len = name_len; 486 } 487 } 488 489 490 void vframeStreamCommon::skip_reflection_related_frames() { 491 while (!at_end() && 492 (JDK_Version::is_gte_jdk14x_version() && UseNewReflection && 493 (Klass::cast(method()->method_holder())->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) || 494 Klass::cast(method()->method_holder())->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass())))) { 495 next(); 496 } 497 } 498 499 500 #ifndef PRODUCT 501 void vframe::print() { 502 if (WizardMode) _fr.print_value_on(tty,NULL); 503 } 504 505 506 void vframe::print_value() const { 507 ((vframe*)this)->print(); 508 } 509 510 511 void entryVFrame::print_value() const { 512 ((entryVFrame*)this)->print(); 513 } 514 515 void entryVFrame::print() { 516 vframe::print(); 517 tty->print_cr("C Chunk inbetween Java"); 518 tty->print_cr("C link " INTPTR_FORMAT, _fr.link()); 519 } 520 521 522 // ------------- javaVFrame -------------- 523 524 static void print_stack_values(const char* title, StackValueCollection* values) { 525 if (values->is_empty()) return; 526 tty->print_cr("\t%s:", title); 527 values->print(); 528 } 529 530 531 void javaVFrame::print() { 532 ResourceMark rm; 533 vframe::print(); 534 tty->print("\t"); 535 method()->print_value(); 536 tty->cr(); 537 tty->print_cr("\tbci: %d", bci()); 538 539 print_stack_values("locals", locals()); 540 print_stack_values("expressions", expressions()); 541 542 GrowableArray<MonitorInfo*>* list = monitors(); 543 if (list->is_empty()) return; 544 tty->print_cr("\tmonitor list:"); 545 for (int index = (list->length()-1); index >= 0; index--) { 546 MonitorInfo* monitor = list->at(index); 547 tty->print("\t obj\t"); 548 if (monitor->owner_is_scalar_replaced()) { 549 Klass* k = Klass::cast(monitor->owner_klass()); 550 tty->print("( is scalar replaced %s)", k->external_name()); 551 } else if (monitor->owner() == NULL) { 552 tty->print("( null )"); 553 } else { 554 monitor->owner()->print_value(); 555 tty->print("(" INTPTR_FORMAT ")", (address)monitor->owner()); 556 } 557 if (monitor->eliminated() && is_compiled_frame()) 558 tty->print(" ( lock is eliminated )"); 559 tty->cr(); 560 tty->print("\t "); 561 monitor->lock()->print_on(tty); 562 tty->cr(); 563 } 564 } 565 566 567 void javaVFrame::print_value() const { 568 methodOop m = method(); 569 klassOop k = m->method_holder(); 570 tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")", 571 _fr.sp(), _fr.unextended_sp(), _fr.fp(), _fr.pc()); 572 tty->print("%s.%s", Klass::cast(k)->internal_name(), m->name()->as_C_string()); 573 574 if (!m->is_native()) { 575 symbolOop source_name = instanceKlass::cast(k)->source_file_name(); 576 int line_number = m->line_number_from_bci(bci()); 577 if (source_name != NULL && (line_number != -1)) { 578 tty->print("(%s:%d)", source_name->as_C_string(), line_number); 579 } 580 } else { 581 tty->print("(Native Method)"); 582 } 583 // Check frame size and print warning if it looks suspiciously large 584 if (fr().sp() != NULL) { 585 RegisterMap map = *register_map(); 586 uint size = fr().frame_size(&map); 587 #ifdef _LP64 588 if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size); 589 #else 590 if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size); 591 #endif 592 } 593 } 594 595 596 bool javaVFrame::structural_compare(javaVFrame* other) { 597 // Check static part 598 if (method() != other->method()) return false; 599 if (bci() != other->bci()) return false; 600 601 // Check locals 602 StackValueCollection *locs = locals(); 603 StackValueCollection *other_locs = other->locals(); 604 assert(locs->size() == other_locs->size(), "sanity check"); 605 int i; 606 for(i = 0; i < locs->size(); i++) { 607 // it might happen the compiler reports a conflict and 608 // the interpreter reports a bogus int. 609 if ( is_compiled_frame() && locs->at(i)->type() == T_CONFLICT) continue; 610 if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue; 611 612 if (!locs->at(i)->equal(other_locs->at(i))) 613 return false; 614 } 615 616 // Check expressions 617 StackValueCollection* exprs = expressions(); 618 StackValueCollection* other_exprs = other->expressions(); 619 assert(exprs->size() == other_exprs->size(), "sanity check"); 620 for(i = 0; i < exprs->size(); i++) { 621 if (!exprs->at(i)->equal(other_exprs->at(i))) 622 return false; 623 } 624 625 return true; 626 } 627 628 629 void javaVFrame::print_activation(int index) const { 630 // frame number and method 631 tty->print("%2d - ", index); 632 ((vframe*)this)->print_value(); 633 tty->cr(); 634 635 if (WizardMode) { 636 ((vframe*)this)->print(); 637 tty->cr(); 638 } 639 } 640 641 642 void javaVFrame::verify() const { 643 } 644 645 646 void interpretedVFrame::verify() const { 647 } 648 649 650 // ------------- externalVFrame -------------- 651 652 void externalVFrame::print() { 653 _fr.print_value_on(tty,NULL); 654 } 655 656 657 void externalVFrame::print_value() const { 658 ((vframe*)this)->print(); 659 } 660 #endif // PRODUCT