1 /*
   2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/javaClasses.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "classfile/vmSymbols.hpp"
  29 #include "code/codeCache.hpp"
  30 #include "code/debugInfoRec.hpp"
  31 #include "code/nmethod.hpp"
  32 #include "code/pcDesc.hpp"
  33 #include "code/scopeDesc.hpp"
  34 #include "interpreter/interpreter.hpp"
  35 #include "interpreter/oopMapCache.hpp"
  36 #include "memory/resourceArea.hpp"
  37 #include "oops/instanceKlass.hpp"
  38 #include "oops/oop.inline.hpp"
  39 #include "runtime/handles.inline.hpp"
  40 #include "runtime/objectMonitor.hpp"
  41 #include "runtime/objectMonitor.inline.hpp"
  42 #include "runtime/signature.hpp"
  43 #include "runtime/stubRoutines.hpp"
  44 #include "runtime/synchronizer.hpp"
  45 #include "runtime/vframe.hpp"
  46 #include "runtime/vframeArray.hpp"
  47 #include "runtime/vframe_hp.hpp"
  48 
  49 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  50 
  51 vframe::vframe(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
  52 : _reg_map(reg_map), _thread(thread) {
  53   assert(fr != NULL, "must have frame");
  54   _fr = *fr;
  55 }
  56 
  57 vframe::vframe(const frame* fr, JavaThread* thread)
  58 : _reg_map(thread), _thread(thread) {
  59   assert(fr != NULL, "must have frame");
  60   _fr = *fr;
  61 }
  62 
  63 vframe* vframe::new_vframe(const frame* f, const RegisterMap* reg_map, JavaThread* thread) {
  64   // Interpreter frame
  65   if (f->is_interpreted_frame()) {
  66     return new interpretedVFrame(f, reg_map, thread);
  67   }
  68 
  69   // Compiled frame
  70   CodeBlob* cb = f->cb();
  71   if (cb != NULL) {
  72     if (cb->is_nmethod()) {
  73       nmethod* nm = (nmethod*)cb;
  74       return new compiledVFrame(f, reg_map, thread, nm);
  75     }
  76 
  77     if (f->is_runtime_frame()) {
  78       // Skip this frame and try again.
  79       RegisterMap temp_map = *reg_map;
  80       frame s = f->sender(&temp_map);
  81       return new_vframe(&s, &temp_map, thread);
  82     }
  83   }
  84 
  85   // External frame
  86   return new externalVFrame(f, reg_map, thread);
  87 }
  88 
  89 vframe* vframe::sender() const {
  90   RegisterMap temp_map = *register_map();
  91   assert(is_top(), "just checking");
  92   if (_fr.is_entry_frame() && _fr.is_first_frame()) return NULL;
  93   frame s = _fr.real_sender(&temp_map);
  94   if (s.is_first_frame()) return NULL;
  95   return vframe::new_vframe(&s, &temp_map, thread());
  96 }
  97 
  98 vframe* vframe::top() const {
  99   vframe* vf = (vframe*) this;
 100   while (!vf->is_top()) vf = vf->sender();
 101   return vf;
 102 }
 103 
 104 
 105 javaVFrame* vframe::java_sender() const {
 106   vframe* f = sender();
 107   while (f != NULL) {
 108     if (f->is_java_frame()) return javaVFrame::cast(f);
 109     f = f->sender();
 110   }
 111   return NULL;
 112 }
 113 
 114 // ------------- javaVFrame --------------
 115 
 116 GrowableArray<MonitorInfo*>* javaVFrame::locked_monitors() {
 117   assert(SafepointSynchronize::is_at_safepoint() || JavaThread::current() == thread(),
 118          "must be at safepoint or it's a java frame of the current thread");
 119 
 120   GrowableArray<MonitorInfo*>* mons = monitors();
 121   GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(mons->length());
 122   if (mons->is_empty()) return result;
 123 
 124   bool found_first_monitor = false;
 125   ObjectMonitor *pending_monitor = thread()->current_pending_monitor();
 126   ObjectMonitor *waiting_monitor = thread()->current_waiting_monitor();
 127   oop pending_obj = (pending_monitor != NULL ? (oop) pending_monitor->object() : (oop) NULL);
 128   oop waiting_obj = (waiting_monitor != NULL ? (oop) waiting_monitor->object() : (oop) NULL);
 129 
 130   for (int index = (mons->length()-1); index >= 0; index--) {
 131     MonitorInfo* monitor = mons->at(index);
 132     if (monitor->eliminated() && is_compiled_frame()) continue; // skip eliminated monitor
 133     oop obj = monitor->owner();
 134     if (obj == NULL) continue; // skip unowned monitor
 135     //
 136     // Skip the monitor that the thread is blocked to enter or waiting on
 137     //
 138     if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
 139       continue;
 140     }
 141     found_first_monitor = true;
 142     result->append(monitor);
 143   }
 144   return result;
 145 }
 146 
 147 static void print_locked_object_class_name(outputStream* st, Handle obj, const char* lock_state) {
 148   if (obj.not_null()) {
 149     st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, (address)obj());
 150     if (obj->klass() == SystemDictionary::Class_klass()) {
 151       Klass* target_klass = java_lang_Class::as_Klass(obj());
 152       st->print_cr("(a java.lang.Class for %s)", InstanceKlass::cast(target_klass)->external_name());
 153     } else {
 154       Klass* k = obj->klass();
 155       st->print_cr("(a %s)", k->external_name());
 156     }
 157   }
 158 }
 159 
 160 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
 161   ResourceMark rm;
 162 
 163   // If this is the first frame, and java.lang.Object.wait(...) then print out the receiver.
 164   if (frame_count == 0) {
 165     if (method()->name() == vmSymbols::wait_name() &&
 166         method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
 167       StackValueCollection* locs = locals();
 168       if (!locs->is_empty()) {
 169         StackValue* sv = locs->at(0);
 170         if (sv->type() == T_OBJECT) {
 171           Handle o = locs->at(0)->get_obj();
 172           print_locked_object_class_name(st, o, "waiting on");
 173         }
 174       }
 175     } else if (thread()->current_park_blocker() != NULL) {
 176       oop obj = thread()->current_park_blocker();
 177       Klass* k = obj->klass();
 178       st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", (address)obj, k->external_name());
 179     }
 180   }
 181 
 182 
 183   // Print out all monitors that we have locked or are trying to lock
 184   GrowableArray<MonitorInfo*>* mons = monitors();
 185   if (!mons->is_empty()) {
 186     bool found_first_monitor = false;
 187     for (int index = (mons->length()-1); index >= 0; index--) {
 188       MonitorInfo* monitor = mons->at(index);
 189       if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
 190         if (monitor->owner_is_scalar_replaced()) {
 191           Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
 192           // format below for lockbits matches this one.
 193           st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
 194         } else {
 195           oop obj = monitor->owner();
 196           if (obj != NULL) {
 197             print_locked_object_class_name(st, obj, "eliminated");
 198           }
 199         }
 200         continue;
 201       }
 202       if (monitor->owner() != NULL) {
 203         // the monitor is associated with an object, i.e., it is locked
 204 
 205         // First, assume we have the monitor locked. If we haven't found an
 206         // owned monitor before and this is the first frame, then we need to
 207         // see if we have completed the lock or we are blocked trying to
 208         // acquire it - we can only be blocked if the monitor is inflated
 209 
 210         markOop mark = NULL;
 211         const char *lock_state = "locked"; // assume we have the monitor locked
 212         if (!found_first_monitor && frame_count == 0) {
 213           mark = monitor->owner()->mark();
 214           if (mark->has_monitor() &&
 215               ( // we have marked ourself as pending on this monitor
 216                 mark->monitor() == thread()->current_pending_monitor() ||
 217                 // we are not the owner of this monitor
 218                 !mark->monitor()->is_entered(thread())
 219               )) {
 220             lock_state = "waiting to lock";
 221           } else {
 222             mark = NULL; // Disable printing below
 223           }
 224         }
 225         print_locked_object_class_name(st, monitor->owner(), lock_state);
 226         if (Verbose && mark != NULL) {
 227           // match with format above, replacing "-" with " ".
 228           st->print("\t  lockbits=");
 229           mark->print_on(st);
 230           st->cr();
 231         }
 232 
 233         found_first_monitor = true;

 234       }
 235     }
 236   }
 237 }
 238 
 239 // ------------- interpretedVFrame --------------
 240 
 241 u_char* interpretedVFrame::bcp() const {
 242   return fr().interpreter_frame_bcp();
 243 }
 244 
 245 void interpretedVFrame::set_bcp(u_char* bcp) {
 246   fr().interpreter_frame_set_bcp(bcp);
 247 }
 248 
 249 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
 250   assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
 251   return fr().interpreter_frame_local_at(offset);
 252 }
 253 
 254 
 255 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
 256   GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
 257   for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
 258        current >= fr().interpreter_frame_monitor_end();
 259        current = fr().previous_monitor_in_interpreter_frame(current)) {
 260     result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
 261   }
 262   return result;
 263 }
 264 
 265 int interpretedVFrame::bci() const {
 266   return method()->bci_from(bcp());
 267 }
 268 
 269 Method* interpretedVFrame::method() const {
 270   return fr().interpreter_frame_method();
 271 }
 272 
 273 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
 274                                                    int index,
 275                                                    const intptr_t* const addr) {
 276 
 277   assert(index >= 0 &&
 278          index < oop_mask.number_of_entries(), "invariant");
 279 
 280   // categorize using oop_mask
 281   if (oop_mask.is_oop(index)) {
 282     // reference (oop) "r"
 283     Handle h(addr != NULL ? (*(oop*)addr) : (oop)NULL);
 284     return new StackValue(h);
 285   }
 286   // value (integer) "v"
 287   return new StackValue(addr != NULL ? *addr : 0);
 288 }
 289 
 290 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
 291   assert(addr != NULL, "invariant");
 292 
 293   // Ensure to be 'inside' the expresion stack (i.e., addr >= sp for Intel).
 294   // In case of exceptions, the expression stack is invalid and the sp
 295   // will be reset to express this condition.
 296   if (frame::interpreter_frame_expression_stack_direction() > 0) {
 297     return addr <= fr.interpreter_frame_tos_address();
 298   }
 299 
 300   return addr >= fr.interpreter_frame_tos_address();
 301 }
 302 
 303 static void stack_locals(StackValueCollection* result,
 304                          int length,
 305                          const InterpreterOopMap& oop_mask,
 306                          const frame& fr) {
 307 
 308   assert(result != NULL, "invariant");
 309 
 310   for (int i = 0; i < length; ++i) {
 311     const intptr_t* const addr = fr.interpreter_frame_local_at(i);
 312     assert(addr != NULL, "invariant");
 313     assert(addr >= fr.sp(), "must be inside the frame");
 314 
 315     StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr);
 316     assert(sv != NULL, "sanity check");
 317 
 318     result->add(sv);
 319   }
 320 }
 321 
 322 static void stack_expressions(StackValueCollection* result,
 323                               int length,
 324                               int max_locals,
 325                               const InterpreterOopMap& oop_mask,
 326                               const frame& fr) {
 327 
 328   assert(result != NULL, "invariant");
 329 
 330   for (int i = 0; i < length; ++i) {
 331     const intptr_t* addr = fr.interpreter_frame_expression_stack_at(i);
 332     assert(addr != NULL, "invariant");
 333     if (!is_in_expression_stack(fr, addr)) {
 334       // Need to ensure no bogus escapes.
 335       addr = NULL;
 336     }
 337 
 338     StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
 339                                                            i + max_locals,
 340                                                            addr);
 341     assert(sv != NULL, "sanity check");
 342 
 343     result->add(sv);
 344   }
 345 }
 346 
 347 StackValueCollection* interpretedVFrame::locals() const {
 348   return stack_data(false);
 349 }
 350 
 351 StackValueCollection* interpretedVFrame::expressions() const {
 352   return stack_data(true);
 353 }
 354 
 355 /*
 356  * Worker routine for fetching references and/or values
 357  * for a particular bci in the interpretedVFrame.
 358  *
 359  * Returns data for either "locals" or "expressions",
 360  * using bci relative oop_map (oop_mask) information.
 361  *
 362  * @param expressions  bool switch controlling what data to return
 363                        (false == locals / true == expression)
 364  *
 365  */
 366 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
 367 
 368   InterpreterOopMap oop_mask;
 369   // oopmap for current bci
 370   if (TraceDeoptimization && Verbose) {
 371     methodHandle m_h(Thread::current(), method());
 372     OopMapCache::compute_one_oop_map(m_h, bci(), &oop_mask);
 373   } else {
 374     method()->mask_for(bci(), &oop_mask);
 375   }
 376 
 377   const int mask_len = oop_mask.number_of_entries();
 378 
 379   // If the method is native, method()->max_locals() is not telling the truth.
 380   // For our purposes, max locals instead equals the size of parameters.
 381   const int max_locals = method()->is_native() ?
 382     method()->size_of_parameters() : method()->max_locals();
 383 
 384   assert(mask_len >= max_locals, "invariant");
 385 
 386   const int length = expressions ? mask_len - max_locals : max_locals;
 387   assert(length >= 0, "invariant");
 388 
 389   StackValueCollection* const result = new StackValueCollection(length);
 390 
 391   if (0 == length) {
 392     return result;
 393   }
 394 
 395   if (expressions) {
 396     stack_expressions(result, length, max_locals, oop_mask, fr());
 397   } else {
 398     stack_locals(result, length, oop_mask, fr());
 399   }
 400 
 401   assert(length == result->size(), "invariant");
 402 
 403   return result;
 404 }
 405 
 406 void interpretedVFrame::set_locals(StackValueCollection* values) const {
 407   if (values == NULL || values->size() == 0) return;
 408 
 409   // If the method is native, max_locals is not telling the truth.
 410   // maxlocals then equals the size of parameters
 411   const int max_locals = method()->is_native() ?
 412     method()->size_of_parameters() : method()->max_locals();
 413 
 414   assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
 415 
 416   // handle locals
 417   for (int i = 0; i < max_locals; i++) {
 418     // Find stack location
 419     intptr_t *addr = locals_addr_at(i);
 420 
 421     // Depending on oop/int put it in the right package
 422     const StackValue* const sv = values->at(i);
 423     assert(sv != NULL, "sanity check");
 424     if (sv->type() == T_OBJECT) {
 425       *(oop *) addr = (sv->get_obj())();
 426     } else {                   // integer
 427       *addr = sv->get_int();
 428     }
 429   }
 430 }
 431 
 432 // ------------- cChunk --------------
 433 
 434 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
 435 : externalVFrame(fr, reg_map, thread) {}
 436 
 437 
 438 void vframeStreamCommon::found_bad_method_frame() {
 439   // 6379830 Cut point for an assertion that occasionally fires when
 440   // we are using the performance analyzer.
 441   // Disable this assert when testing the analyzer with fastdebug.
 442   // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
 443   assert(false, "invalid bci or invalid scope desc");
 444 }
 445 
 446 // top-frame will be skipped
 447 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
 448   bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
 449   _stop_at_java_call_stub = stop_at_java_call_stub;
 450 
 451   // skip top frame, as it may not be at safepoint
 452   _frame  = top_frame.sender(&_reg_map);
 453   while (!fill_from_frame()) {
 454     _frame = _frame.sender(&_reg_map);
 455   }
 456 }
 457 
 458 
 459 // Step back n frames, skip any pseudo frames in between.
 460 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
 461 // AccessController.doPrivileged.
 462 void vframeStreamCommon::security_get_caller_frame(int depth) {
 463   assert(depth >= 0, err_msg("invalid depth: %d", depth));
 464   for (int n = 0; !at_end(); security_next()) {
 465     if (!method()->is_ignored_by_security_stack_walk()) {
 466       if (n == depth) {
 467         // We have reached the desired depth; return.
 468         return;
 469       }
 470       n++;  // this is a non-skipped frame; count it against the depth
 471     }
 472   }
 473   // NOTE: At this point there were not enough frames on the stack
 474   // to walk to depth.  Callers of this method have to check for at_end.
 475 }
 476 
 477 
 478 void vframeStreamCommon::security_next() {
 479   if (method()->is_prefixed_native()) {
 480     skip_prefixed_method_and_wrappers();  // calls next()
 481   } else {
 482     next();
 483   }
 484 }
 485 
 486 
 487 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
 488   ResourceMark rm;
 489   HandleMark hm;
 490 
 491   int    method_prefix_count = 0;
 492   char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
 493   KlassHandle prefixed_klass(method()->method_holder());
 494   const char* prefixed_name = method()->name()->as_C_string();
 495   size_t prefixed_name_len = strlen(prefixed_name);
 496   int prefix_index = method_prefix_count-1;
 497 
 498   while (!at_end()) {
 499     next();
 500     if (method()->method_holder() != prefixed_klass()) {
 501       break; // classes don't match, can't be a wrapper
 502     }
 503     const char* name = method()->name()->as_C_string();
 504     size_t name_len = strlen(name);
 505     size_t prefix_len = prefixed_name_len - name_len;
 506     if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
 507       break; // prefixed name isn't prefixed version of method name, can't be a wrapper
 508     }
 509     for (; prefix_index >= 0; --prefix_index) {
 510       const char* possible_prefix = method_prefixes[prefix_index];
 511       size_t possible_prefix_len = strlen(possible_prefix);
 512       if (possible_prefix_len == prefix_len &&
 513           strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
 514         break; // matching prefix found
 515       }
 516     }
 517     if (prefix_index < 0) {
 518       break; // didn't find the prefix, can't be a wrapper
 519     }
 520     prefixed_name = name;
 521     prefixed_name_len = name_len;
 522   }
 523 }
 524 
 525 
 526 void vframeStreamCommon::skip_reflection_related_frames() {
 527   while (!at_end() &&
 528           (method()->method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) ||
 529            method()->method_holder()->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass()))) {
 530     next();
 531   }
 532 }
 533 
 534 
 535 #ifndef PRODUCT
 536 void vframe::print() {
 537   if (WizardMode) _fr.print_value_on(tty,NULL);
 538 }
 539 
 540 
 541 void vframe::print_value() const {
 542   ((vframe*)this)->print();
 543 }
 544 
 545 
 546 void entryVFrame::print_value() const {
 547   ((entryVFrame*)this)->print();
 548 }
 549 
 550 void entryVFrame::print() {
 551   vframe::print();
 552   tty->print_cr("C Chunk inbetween Java");
 553   tty->print_cr("C     link " INTPTR_FORMAT, _fr.link());
 554 }
 555 
 556 
 557 // ------------- javaVFrame --------------
 558 
 559 static void print_stack_values(const char* title, StackValueCollection* values) {
 560   if (values->is_empty()) return;
 561   tty->print_cr("\t%s:", title);
 562   values->print();
 563 }
 564 
 565 
 566 void javaVFrame::print() {
 567   ResourceMark rm;
 568   vframe::print();
 569   tty->print("\t");
 570   method()->print_value();
 571   tty->cr();
 572   tty->print_cr("\tbci:    %d", bci());
 573 
 574   print_stack_values("locals",      locals());
 575   print_stack_values("expressions", expressions());
 576 
 577   GrowableArray<MonitorInfo*>* list = monitors();
 578   if (list->is_empty()) return;
 579   tty->print_cr("\tmonitor list:");
 580   for (int index = (list->length()-1); index >= 0; index--) {
 581     MonitorInfo* monitor = list->at(index);
 582     tty->print("\t  obj\t");
 583     if (monitor->owner_is_scalar_replaced()) {
 584       Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
 585       tty->print("( is scalar replaced %s)", k->external_name());
 586     } else if (monitor->owner() == NULL) {
 587       tty->print("( null )");
 588     } else {
 589       monitor->owner()->print_value();
 590       tty->print("(owner=" INTPTR_FORMAT ")", (address)monitor->owner());
 591     }
 592     if (monitor->eliminated())
 593         if(is_compiled_frame())
 594             tty->print(" ( lock is eliminated in compiled frame )");
 595         else
 596             tty->print(" ( lock is eliminated, frame not compiled )");
 597     tty->cr();
 598     tty->print("\t  ");
 599     monitor->lock()->print_on(tty);
 600     tty->cr();
 601   }
 602 }
 603 
 604 
 605 void javaVFrame::print_value() const {
 606   Method*    m = method();
 607   InstanceKlass*     k = m->method_holder();
 608   tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
 609                 _fr.sp(),  _fr.unextended_sp(), _fr.fp(), _fr.pc());
 610   tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
 611 
 612   if (!m->is_native()) {
 613     Symbol*  source_name = k->source_file_name();
 614     int        line_number = m->line_number_from_bci(bci());
 615     if (source_name != NULL && (line_number != -1)) {
 616       tty->print("(%s:%d)", source_name->as_C_string(), line_number);
 617     }
 618   } else {
 619     tty->print("(Native Method)");
 620   }
 621   // Check frame size and print warning if it looks suspiciously large
 622   if (fr().sp() != NULL) {
 623     RegisterMap map = *register_map();
 624     uint size = fr().frame_size(&map);
 625 #ifdef _LP64
 626     if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
 627 #else
 628     if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
 629 #endif
 630   }
 631 }
 632 
 633 
 634 bool javaVFrame::structural_compare(javaVFrame* other) {
 635   // Check static part
 636   if (method() != other->method()) return false;
 637   if (bci()    != other->bci())    return false;
 638 
 639   // Check locals
 640   StackValueCollection *locs = locals();
 641   StackValueCollection *other_locs = other->locals();
 642   assert(locs->size() == other_locs->size(), "sanity check");
 643   int i;
 644   for(i = 0; i < locs->size(); i++) {
 645     // it might happen the compiler reports a conflict and
 646     // the interpreter reports a bogus int.
 647     if (       is_compiled_frame() &&       locs->at(i)->type() == T_CONFLICT) continue;
 648     if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
 649 
 650     if (!locs->at(i)->equal(other_locs->at(i)))
 651       return false;
 652   }
 653 
 654   // Check expressions
 655   StackValueCollection* exprs = expressions();
 656   StackValueCollection* other_exprs = other->expressions();
 657   assert(exprs->size() == other_exprs->size(), "sanity check");
 658   for(i = 0; i < exprs->size(); i++) {
 659     if (!exprs->at(i)->equal(other_exprs->at(i)))
 660       return false;
 661   }
 662 
 663   return true;
 664 }
 665 
 666 
 667 void javaVFrame::print_activation(int index) const {
 668   // frame number and method
 669   tty->print("%2d - ", index);
 670   ((vframe*)this)->print_value();
 671   tty->cr();
 672 
 673   if (WizardMode) {
 674     ((vframe*)this)->print();
 675     tty->cr();
 676   }
 677 }
 678 
 679 
 680 void javaVFrame::verify() const {
 681 }
 682 
 683 
 684 void interpretedVFrame::verify() const {
 685 }
 686 
 687 
 688 // ------------- externalVFrame --------------
 689 
 690 void externalVFrame::print() {
 691   _fr.print_value_on(tty,NULL);
 692 }
 693 
 694 
 695 void externalVFrame::print_value() const {
 696   ((vframe*)this)->print();
 697 }
 698 #endif // PRODUCT
--- EOF ---