1 /*
   2  * Copyright (c) 1997, 2019, 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/frame.inline.hpp"
  40 #include "runtime/handles.inline.hpp"
  41 #include "runtime/objectMonitor.hpp"
  42 #include "runtime/objectMonitor.inline.hpp"
  43 #include "runtime/signature.hpp"
  44 #include "runtime/stubRoutines.hpp"
  45 #include "runtime/synchronizer.hpp"
  46 #include "runtime/thread.inline.hpp"
  47 #include "runtime/vframe.inline.hpp"
  48 #include "runtime/vframeArray.hpp"
  49 #include "runtime/vframe_hp.hpp"
  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_compiled()) {
  73       CompiledMethod* nm = (CompiledMethod*)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 && (oopDesc::equals(obj, pending_obj) || oopDesc::equals(obj, waiting_obj))) {
 139       continue;
 140     }
 141     found_first_monitor = true;
 142     result->append(monitor);
 143   }
 144   return result;
 145 }
 146 
 147 void javaVFrame::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, p2i(obj()));
 150     if (obj->klass() == SystemDictionary::Class_klass()) {
 151       st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
 152     } else {
 153       Klass* k = obj->klass();
 154       st->print_cr("(a %s)", k->external_name());
 155     }
 156   }
 157 }
 158 
 159 void javaVFrame::print_lock_info_on(outputStream* st, int frame_count) {
 160   Thread* THREAD = Thread::current();
 161   ResourceMark rm(THREAD);
 162 
 163   // If this is the first frame and it is java.lang.Object.wait(...)
 164   // then print out the receiver. Locals are not always available,
 165   // e.g., compiled native frames have no scope so there are no locals.
 166   if (frame_count == 0) {
 167     if (method()->name() == vmSymbols::wait_name() &&
 168         method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
 169       const char *wait_state = "waiting on"; // assume we are waiting
 170       // If earlier in the output we reported java.lang.Thread.State ==
 171       // "WAITING (on object monitor)" and now we report "waiting on", then
 172       // we are still waiting for notification or timeout. Otherwise if
 173       // we earlier reported java.lang.Thread.State == "BLOCKED (on object
 174       // monitor)", then we are actually waiting to re-lock the monitor.
 175       StackValueCollection* locs = locals();
 176       if (!locs->is_empty()) {
 177         StackValue* sv = locs->at(0);
 178         if (sv->type() == T_OBJECT) {
 179           Handle o = locs->at(0)->get_obj();
 180           if (java_lang_Thread::get_thread_status(thread()->threadObj()) ==
 181                                 java_lang_Thread::BLOCKED_ON_MONITOR_ENTER) {
 182             wait_state = "waiting to re-lock in wait()";
 183           }
 184           print_locked_object_class_name(st, o, wait_state);
 185         }
 186       } else {
 187         st->print_cr("\t- %s <no object reference available>", wait_state);
 188       }
 189     } else if (thread()->current_park_blocker() != NULL) {
 190       oop obj = thread()->current_park_blocker();
 191       Klass* k = obj->klass();
 192       st->print_cr("\t- %s <" INTPTR_FORMAT "> (a %s)", "parking to wait for ", p2i(obj), k->external_name());
 193     }
 194     else if (thread()->osthread()->get_state() == OBJECT_WAIT) {
 195       // We are waiting on an Object monitor but Object.wait() isn't the
 196       // top-frame, so we should be waiting on a Class initialization monitor.
 197       InstanceKlass* k = thread()->class_to_be_initialized();
 198       if (k != NULL) {
 199         st->print_cr("\t- waiting on the Class initialization monitor for %s", k->external_name());
 200       }
 201     }
 202   }
 203 
 204   // Print out all monitors that we have locked, or are trying to lock,
 205   // including re-locking after being notified or timing out in a wait().
 206   GrowableArray<MonitorInfo*>* mons = monitors();
 207   if (!mons->is_empty()) {
 208     bool found_first_monitor = false;
 209     for (int index = (mons->length()-1); index >= 0; index--) {
 210       MonitorInfo* monitor = mons->at(index);
 211       if (monitor->eliminated() && is_compiled_frame()) { // Eliminated in compiled code
 212         if (monitor->owner_is_scalar_replaced()) {
 213           Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
 214           // format below for lockbits matches this one.
 215           st->print("\t- eliminated <owner is scalar replaced> (a %s)", k->external_name());
 216         } else {
 217           Handle obj(THREAD, monitor->owner());
 218           if (obj() != NULL) {
 219             print_locked_object_class_name(st, obj, "eliminated");
 220           }
 221         }
 222         continue;
 223       }
 224       if (monitor->owner() != NULL) {
 225         // the monitor is associated with an object, i.e., it is locked
 226 
 227         markOop mark = NULL;
 228         const char *lock_state = "locked"; // assume we have the monitor locked
 229         if (!found_first_monitor && frame_count == 0) {
 230           // If this is the first frame and we haven't found an owned
 231           // monitor before, then we need to see if we have completed
 232           // the lock or if we are blocked trying to acquire it. Only
 233           // an inflated monitor that is first on the monitor list in
 234           // the first frame can block us on a monitor enter.
 235           mark = monitor->owner()->mark();
 236           if (mark->has_monitor() &&
 237               ( // we have marked ourself as pending on this monitor
 238                 mark->monitor() == thread()->current_pending_monitor() ||
 239                 // we are not the owner of this monitor
 240                 !mark->monitor()->is_entered(thread())
 241               )) {
 242             lock_state = "waiting to lock";
 243           } else {
 244             // We own the monitor which is not as interesting so
 245             // disable the extra printing below.
 246             mark = NULL;
 247           }
 248         }
 249         print_locked_object_class_name(st, Handle(THREAD, monitor->owner()), lock_state);
 250 
 251         found_first_monitor = true;
 252       }
 253     }
 254   }
 255 }
 256 
 257 // ------------- interpretedVFrame --------------
 258 
 259 u_char* interpretedVFrame::bcp() const {
 260   return fr().interpreter_frame_bcp();
 261 }
 262 
 263 void interpretedVFrame::set_bcp(u_char* bcp) {
 264   fr().interpreter_frame_set_bcp(bcp);
 265 }
 266 
 267 intptr_t* interpretedVFrame::locals_addr_at(int offset) const {
 268   assert(fr().is_interpreted_frame(), "frame should be an interpreted frame");
 269   return fr().interpreter_frame_local_at(offset);
 270 }
 271 
 272 
 273 GrowableArray<MonitorInfo*>* interpretedVFrame::monitors() const {
 274   GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(5);
 275   for (BasicObjectLock* current = (fr().previous_monitor_in_interpreter_frame(fr().interpreter_frame_monitor_begin()));
 276        current >= fr().interpreter_frame_monitor_end();
 277        current = fr().previous_monitor_in_interpreter_frame(current)) {
 278     result->push(new MonitorInfo(current->obj(), current->lock(), false, false));
 279   }
 280   return result;
 281 }
 282 
 283 int interpretedVFrame::bci() const {
 284   return method()->bci_from(bcp());
 285 }
 286 
 287 Method* interpretedVFrame::method() const {
 288   return fr().interpreter_frame_method();
 289 }
 290 
 291 static StackValue* create_stack_value_from_oop_map(const InterpreterOopMap& oop_mask,
 292                                                    int index,
 293                                                    const intptr_t* const addr) {
 294 
 295   assert(index >= 0 &&
 296          index < oop_mask.number_of_entries(), "invariant");
 297 
 298   // categorize using oop_mask
 299   if (oop_mask.is_oop(index)) {
 300     // reference (oop) "r"
 301     Handle h(Thread::current(), addr != NULL ? (*(oop*)addr) : (oop)NULL);
 302     return new StackValue(h);
 303   }
 304   // value (integer) "v"
 305   return new StackValue(addr != NULL ? *addr : 0);
 306 }
 307 
 308 static bool is_in_expression_stack(const frame& fr, const intptr_t* const addr) {
 309   assert(addr != NULL, "invariant");
 310 
 311   // Ensure to be 'inside' the expresion stack (i.e., addr >= sp for Intel).
 312   // In case of exceptions, the expression stack is invalid and the sp
 313   // will be reset to express this condition.
 314   if (frame::interpreter_frame_expression_stack_direction() > 0) {
 315     return addr <= fr.interpreter_frame_tos_address();
 316   }
 317 
 318   return addr >= fr.interpreter_frame_tos_address();
 319 }
 320 
 321 static void stack_locals(StackValueCollection* result,
 322                          int length,
 323                          const InterpreterOopMap& oop_mask,
 324                          const frame& fr) {
 325 
 326   assert(result != NULL, "invariant");
 327 
 328   for (int i = 0; i < length; ++i) {
 329     const intptr_t* const addr = fr.interpreter_frame_local_at(i);
 330     assert(addr != NULL, "invariant");
 331     assert(addr >= fr.sp(), "must be inside the frame");
 332 
 333     StackValue* const sv = create_stack_value_from_oop_map(oop_mask, i, addr);
 334     assert(sv != NULL, "sanity check");
 335 
 336     result->add(sv);
 337   }
 338 }
 339 
 340 static void stack_expressions(StackValueCollection* result,
 341                               int length,
 342                               int max_locals,
 343                               const InterpreterOopMap& oop_mask,
 344                               const frame& fr) {
 345 
 346   assert(result != NULL, "invariant");
 347 
 348   for (int i = 0; i < length; ++i) {
 349     const intptr_t* addr = fr.interpreter_frame_expression_stack_at(i);
 350     assert(addr != NULL, "invariant");
 351     if (!is_in_expression_stack(fr, addr)) {
 352       // Need to ensure no bogus escapes.
 353       addr = NULL;
 354     }
 355 
 356     StackValue* const sv = create_stack_value_from_oop_map(oop_mask,
 357                                                            i + max_locals,
 358                                                            addr);
 359     assert(sv != NULL, "sanity check");
 360 
 361     result->add(sv);
 362   }
 363 }
 364 
 365 StackValueCollection* interpretedVFrame::locals() const {
 366   return stack_data(false);
 367 }
 368 
 369 StackValueCollection* interpretedVFrame::expressions() const {
 370   return stack_data(true);
 371 }
 372 
 373 /*
 374  * Worker routine for fetching references and/or values
 375  * for a particular bci in the interpretedVFrame.
 376  *
 377  * Returns data for either "locals" or "expressions",
 378  * using bci relative oop_map (oop_mask) information.
 379  *
 380  * @param expressions  bool switch controlling what data to return
 381                        (false == locals / true == expression)
 382  *
 383  */
 384 StackValueCollection* interpretedVFrame::stack_data(bool expressions) const {
 385 
 386   InterpreterOopMap oop_mask;
 387   method()->mask_for(bci(), &oop_mask);
 388   const int mask_len = oop_mask.number_of_entries();
 389 
 390   // If the method is native, method()->max_locals() is not telling the truth.
 391   // For our purposes, max locals instead equals the size of parameters.
 392   const int max_locals = method()->is_native() ?
 393     method()->size_of_parameters() : method()->max_locals();
 394 
 395   assert(mask_len >= max_locals, "invariant");
 396 
 397   const int length = expressions ? mask_len - max_locals : max_locals;
 398   assert(length >= 0, "invariant");
 399 
 400   StackValueCollection* const result = new StackValueCollection(length);
 401 
 402   if (0 == length) {
 403     return result;
 404   }
 405 
 406   if (expressions) {
 407     stack_expressions(result, length, max_locals, oop_mask, fr());
 408   } else {
 409     stack_locals(result, length, oop_mask, fr());
 410   }
 411 
 412   assert(length == result->size(), "invariant");
 413 
 414   return result;
 415 }
 416 
 417 void interpretedVFrame::set_locals(StackValueCollection* values) const {
 418   if (values == NULL || values->size() == 0) return;
 419 
 420   // If the method is native, max_locals is not telling the truth.
 421   // maxlocals then equals the size of parameters
 422   const int max_locals = method()->is_native() ?
 423     method()->size_of_parameters() : method()->max_locals();
 424 
 425   assert(max_locals == values->size(), "Mismatch between actual stack format and supplied data");
 426 
 427   // handle locals
 428   for (int i = 0; i < max_locals; i++) {
 429     // Find stack location
 430     intptr_t *addr = locals_addr_at(i);
 431 
 432     // Depending on oop/int put it in the right package
 433     const StackValue* const sv = values->at(i);
 434     assert(sv != NULL, "sanity check");
 435     if (sv->type() == T_OBJECT) {
 436       *(oop *) addr = (sv->get_obj())();
 437     } else {                   // integer
 438       *addr = sv->get_int();
 439     }
 440   }
 441 }
 442 
 443 // ------------- cChunk --------------
 444 
 445 entryVFrame::entryVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread)
 446 : externalVFrame(fr, reg_map, thread) {}
 447 
 448 #ifdef ASSERT
 449 void vframeStreamCommon::found_bad_method_frame() const {
 450   // 6379830 Cut point for an assertion that occasionally fires when
 451   // we are using the performance analyzer.
 452   // Disable this assert when testing the analyzer with fastdebug.
 453   // -XX:SuppressErrorAt=vframe.cpp:XXX (XXX=following line number)
 454   fatal("invalid bci or invalid scope desc");
 455 }
 456 #endif
 457 
 458 // top-frame will be skipped
 459 vframeStream::vframeStream(JavaThread* thread, frame top_frame,
 460   bool stop_at_java_call_stub) : vframeStreamCommon(thread) {
 461   _stop_at_java_call_stub = stop_at_java_call_stub;
 462 
 463   // skip top frame, as it may not be at safepoint
 464   _prev_frame = top_frame;
 465   _frame  = top_frame.sender(&_reg_map);
 466   while (!fill_from_frame()) {
 467     _prev_frame = _frame;
 468     _frame = _frame.sender(&_reg_map);
 469   }
 470 }
 471 
 472 
 473 // Step back n frames, skip any pseudo frames in between.
 474 // This function is used in Class.forName, Class.newInstance, Method.Invoke,
 475 // AccessController.doPrivileged.
 476 void vframeStreamCommon::security_get_caller_frame(int depth) {
 477   assert(depth >= 0, "invalid depth: %d", depth);
 478   for (int n = 0; !at_end(); security_next()) {
 479     if (!method()->is_ignored_by_security_stack_walk()) {
 480       if (n == depth) {
 481         // We have reached the desired depth; return.
 482         return;
 483       }
 484       n++;  // this is a non-skipped frame; count it against the depth
 485     }
 486   }
 487   // NOTE: At this point there were not enough frames on the stack
 488   // to walk to depth.  Callers of this method have to check for at_end.
 489 }
 490 
 491 
 492 void vframeStreamCommon::security_next() {
 493   if (method()->is_prefixed_native()) {
 494     skip_prefixed_method_and_wrappers();  // calls next()
 495   } else {
 496     next();
 497   }
 498 }
 499 
 500 
 501 void vframeStreamCommon::skip_prefixed_method_and_wrappers() {
 502   ResourceMark rm;
 503   HandleMark hm;
 504 
 505   int    method_prefix_count = 0;
 506   char** method_prefixes = JvmtiExport::get_all_native_method_prefixes(&method_prefix_count);
 507   Klass* prefixed_klass = method()->method_holder();
 508   const char* prefixed_name = method()->name()->as_C_string();
 509   size_t prefixed_name_len = strlen(prefixed_name);
 510   int prefix_index = method_prefix_count-1;
 511 
 512   while (!at_end()) {
 513     next();
 514     if (method()->method_holder() != prefixed_klass) {
 515       break; // classes don't match, can't be a wrapper
 516     }
 517     const char* name = method()->name()->as_C_string();
 518     size_t name_len = strlen(name);
 519     size_t prefix_len = prefixed_name_len - name_len;
 520     if (prefix_len <= 0 || strcmp(name, prefixed_name + prefix_len) != 0) {
 521       break; // prefixed name isn't prefixed version of method name, can't be a wrapper
 522     }
 523     for (; prefix_index >= 0; --prefix_index) {
 524       const char* possible_prefix = method_prefixes[prefix_index];
 525       size_t possible_prefix_len = strlen(possible_prefix);
 526       if (possible_prefix_len == prefix_len &&
 527           strncmp(possible_prefix, prefixed_name, prefix_len) == 0) {
 528         break; // matching prefix found
 529       }
 530     }
 531     if (prefix_index < 0) {
 532       break; // didn't find the prefix, can't be a wrapper
 533     }
 534     prefixed_name = name;
 535     prefixed_name_len = name_len;
 536   }
 537 }
 538 
 539 
 540 void vframeStreamCommon::skip_reflection_related_frames() {
 541   while (!at_end() &&
 542           (method()->method_holder()->is_subclass_of(SystemDictionary::reflect_MethodAccessorImpl_klass()) ||
 543            method()->method_holder()->is_subclass_of(SystemDictionary::reflect_ConstructorAccessorImpl_klass()))) {
 544     next();
 545   }
 546 }
 547 
 548 javaVFrame* vframeStreamCommon::asJavaVFrame() {
 549   javaVFrame* result = NULL;
 550   if (_mode == compiled_mode) {
 551     guarantee(_frame.is_compiled_frame(), "expected compiled Java frame");
 552 
 553     // lazy update to register map
 554     bool update_map = true;
 555     RegisterMap map(_thread, update_map);
 556     frame f = _prev_frame.sender(&map);
 557 
 558     guarantee(f.is_compiled_frame(), "expected compiled Java frame");
 559 
 560     compiledVFrame* cvf = compiledVFrame::cast(vframe::new_vframe(&f, &map, _thread));
 561 
 562     guarantee(cvf->cb() == cb(), "wrong code blob");
 563 
 564     // get the same scope as this stream
 565     cvf = cvf->at_scope(_decode_offset, _vframe_id);
 566 
 567     guarantee(cvf->scope()->decode_offset() == _decode_offset, "wrong scope");
 568     guarantee(cvf->scope()->sender_decode_offset() == _sender_decode_offset, "wrong scope");
 569     guarantee(cvf->vframe_id() == _vframe_id, "wrong vframe");
 570 
 571     result = cvf;
 572   } else {
 573     result = javaVFrame::cast(vframe::new_vframe(&_frame, &_reg_map, _thread));
 574   }
 575   guarantee(result->method() == method(), "wrong method");
 576   return result;
 577 }
 578 
 579 
 580 #ifndef PRODUCT
 581 void vframe::print() {
 582   if (WizardMode) _fr.print_value_on(tty,NULL);
 583 }
 584 
 585 
 586 void vframe::print_value() const {
 587   ((vframe*)this)->print();
 588 }
 589 
 590 
 591 void entryVFrame::print_value() const {
 592   ((entryVFrame*)this)->print();
 593 }
 594 
 595 void entryVFrame::print() {
 596   vframe::print();
 597   tty->print_cr("C Chunk inbetween Java");
 598   tty->print_cr("C     link " INTPTR_FORMAT, p2i(_fr.link()));
 599 }
 600 
 601 
 602 // ------------- javaVFrame --------------
 603 
 604 static void print_stack_values(const char* title, StackValueCollection* values) {
 605   if (values->is_empty()) return;
 606   tty->print_cr("\t%s:", title);
 607   values->print();
 608 }
 609 
 610 
 611 void javaVFrame::print() {
 612   ResourceMark rm;
 613   vframe::print();
 614   tty->print("\t");
 615   method()->print_value();
 616   tty->cr();
 617   tty->print_cr("\tbci:    %d", bci());
 618 
 619   print_stack_values("locals",      locals());
 620   print_stack_values("expressions", expressions());
 621 
 622   GrowableArray<MonitorInfo*>* list = monitors();
 623   if (list->is_empty()) return;
 624   tty->print_cr("\tmonitor list:");
 625   for (int index = (list->length()-1); index >= 0; index--) {
 626     MonitorInfo* monitor = list->at(index);
 627     tty->print("\t  obj\t");
 628     if (monitor->owner_is_scalar_replaced()) {
 629       Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
 630       tty->print("( is scalar replaced %s)", k->external_name());
 631     } else if (monitor->owner() == NULL) {
 632       tty->print("( null )");
 633     } else {
 634       monitor->owner()->print_value();
 635       tty->print("(owner=" INTPTR_FORMAT ")", p2i(monitor->owner()));
 636     }
 637     if (monitor->eliminated()) {
 638       if(is_compiled_frame()) {
 639         tty->print(" ( lock is eliminated in compiled frame )");
 640       } else {
 641         tty->print(" ( lock is eliminated, frame not compiled )");
 642       }
 643     }
 644     tty->cr();
 645     tty->print("\t  ");
 646     monitor->lock()->print_on(tty);
 647     tty->cr();
 648   }
 649 }
 650 
 651 
 652 void javaVFrame::print_value() const {
 653   Method*    m = method();
 654   InstanceKlass*     k = m->method_holder();
 655   tty->print_cr("frame( sp=" INTPTR_FORMAT ", unextended_sp=" INTPTR_FORMAT ", fp=" INTPTR_FORMAT ", pc=" INTPTR_FORMAT ")",
 656                 p2i(_fr.sp()),  p2i(_fr.unextended_sp()), p2i(_fr.fp()), p2i(_fr.pc()));
 657   tty->print("%s.%s", k->internal_name(), m->name()->as_C_string());
 658 
 659   if (!m->is_native()) {
 660     Symbol*  source_name = k->source_file_name();
 661     int        line_number = m->line_number_from_bci(bci());
 662     if (source_name != NULL && (line_number != -1)) {
 663       tty->print("(%s:%d)", source_name->as_C_string(), line_number);
 664     }
 665   } else {
 666     tty->print("(Native Method)");
 667   }
 668   // Check frame size and print warning if it looks suspiciously large
 669   if (fr().sp() != NULL) {
 670     RegisterMap map = *register_map();
 671     uint size = fr().frame_size(&map);
 672 #ifdef _LP64
 673     if (size > 8*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
 674 #else
 675     if (size > 4*K) warning("SUSPICIOUSLY LARGE FRAME (%d)", size);
 676 #endif
 677   }
 678 }
 679 
 680 
 681 bool javaVFrame::structural_compare(javaVFrame* other) {
 682   // Check static part
 683   if (method() != other->method()) return false;
 684   if (bci()    != other->bci())    return false;
 685 
 686   // Check locals
 687   StackValueCollection *locs = locals();
 688   StackValueCollection *other_locs = other->locals();
 689   assert(locs->size() == other_locs->size(), "sanity check");
 690   int i;
 691   for(i = 0; i < locs->size(); i++) {
 692     // it might happen the compiler reports a conflict and
 693     // the interpreter reports a bogus int.
 694     if (       is_compiled_frame() &&       locs->at(i)->type() == T_CONFLICT) continue;
 695     if (other->is_compiled_frame() && other_locs->at(i)->type() == T_CONFLICT) continue;
 696 
 697     if (!locs->at(i)->equal(other_locs->at(i)))
 698       return false;
 699   }
 700 
 701   // Check expressions
 702   StackValueCollection* exprs = expressions();
 703   StackValueCollection* other_exprs = other->expressions();
 704   assert(exprs->size() == other_exprs->size(), "sanity check");
 705   for(i = 0; i < exprs->size(); i++) {
 706     if (!exprs->at(i)->equal(other_exprs->at(i)))
 707       return false;
 708   }
 709 
 710   return true;
 711 }
 712 
 713 
 714 void javaVFrame::print_activation(int index) const {
 715   // frame number and method
 716   tty->print("%2d - ", index);
 717   ((vframe*)this)->print_value();
 718   tty->cr();
 719 
 720   if (WizardMode) {
 721     ((vframe*)this)->print();
 722     tty->cr();
 723   }
 724 }
 725 
 726 
 727 void javaVFrame::verify() const {
 728 }
 729 
 730 
 731 void interpretedVFrame::verify() const {
 732 }
 733 
 734 
 735 // ------------- externalVFrame --------------
 736 
 737 void externalVFrame::print() {
 738   _fr.print_value_on(tty,NULL);
 739 }
 740 
 741 
 742 void externalVFrame::print_value() const {
 743   ((vframe*)this)->print();
 744 }
 745 #endif // PRODUCT