rev 4267 : 8009981: nashorn tests fail with -XX:+VerifyStack
Summary: nmethod::preserve_callee_argument_oops() must take appendix into account.
Reviewed-by:

   1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "compiler/disassembler.hpp"
  27 #include "gc_interface/collectedHeap.inline.hpp"
  28 #include "interpreter/interpreter.hpp"
  29 #include "interpreter/oopMapCache.hpp"
  30 #include "memory/resourceArea.hpp"
  31 #include "memory/universe.inline.hpp"
  32 #include "oops/markOop.hpp"
  33 #include "oops/methodData.hpp"
  34 #include "oops/method.hpp"
  35 #include "oops/oop.inline.hpp"
  36 #include "oops/oop.inline2.hpp"
  37 #include "prims/methodHandles.hpp"
  38 #include "runtime/frame.inline.hpp"
  39 #include "runtime/handles.inline.hpp"
  40 #include "runtime/javaCalls.hpp"
  41 #include "runtime/monitorChunk.hpp"
  42 #include "runtime/sharedRuntime.hpp"
  43 #include "runtime/signature.hpp"
  44 #include "runtime/stubCodeGenerator.hpp"
  45 #include "runtime/stubRoutines.hpp"
  46 #include "utilities/decoder.hpp"
  47 
  48 #ifdef TARGET_ARCH_x86
  49 # include "nativeInst_x86.hpp"
  50 #endif
  51 #ifdef TARGET_ARCH_sparc
  52 # include "nativeInst_sparc.hpp"
  53 #endif
  54 #ifdef TARGET_ARCH_zero
  55 # include "nativeInst_zero.hpp"
  56 #endif
  57 #ifdef TARGET_ARCH_arm
  58 # include "nativeInst_arm.hpp"
  59 #endif
  60 #ifdef TARGET_ARCH_ppc
  61 # include "nativeInst_ppc.hpp"
  62 #endif
  63 
  64 RegisterMap::RegisterMap(JavaThread *thread, bool update_map) {
  65   _thread         = thread;
  66   _update_map     = update_map;
  67   clear();
  68   debug_only(_update_for_id = NULL;)
  69 #ifndef PRODUCT
  70   for (int i = 0; i < reg_count ; i++ ) _location[i] = NULL;
  71 #endif /* PRODUCT */
  72 }
  73 
  74 RegisterMap::RegisterMap(const RegisterMap* map) {
  75   assert(map != this, "bad initialization parameter");
  76   assert(map != NULL, "RegisterMap must be present");
  77   _thread                = map->thread();
  78   _update_map            = map->update_map();
  79   _include_argument_oops = map->include_argument_oops();
  80   debug_only(_update_for_id = map->_update_for_id;)
  81   pd_initialize_from(map);
  82   if (update_map()) {
  83     for(int i = 0; i < location_valid_size; i++) {
  84       LocationValidType bits = !update_map() ? 0 : map->_location_valid[i];
  85       _location_valid[i] = bits;
  86       // for whichever bits are set, pull in the corresponding map->_location
  87       int j = i*location_valid_type_size;
  88       while (bits != 0) {
  89         if ((bits & 1) != 0) {
  90           assert(0 <= j && j < reg_count, "range check");
  91           _location[j] = map->_location[j];
  92         }
  93         bits >>= 1;
  94         j += 1;
  95       }
  96     }
  97   }
  98 }
  99 
 100 void RegisterMap::clear() {
 101   set_include_argument_oops(true);
 102   if (_update_map) {
 103     for(int i = 0; i < location_valid_size; i++) {
 104       _location_valid[i] = 0;
 105     }
 106     pd_clear();
 107   } else {
 108     pd_initialize();
 109   }
 110 }
 111 
 112 #ifndef PRODUCT
 113 
 114 void RegisterMap::print_on(outputStream* st) const {
 115   st->print_cr("Register map");
 116   for(int i = 0; i < reg_count; i++) {
 117 
 118     VMReg r = VMRegImpl::as_VMReg(i);
 119     intptr_t* src = (intptr_t*) location(r);
 120     if (src != NULL) {
 121 
 122       r->print_on(st);
 123       st->print(" [" INTPTR_FORMAT "] = ", src);
 124       if (((uintptr_t)src & (sizeof(*src)-1)) != 0) {
 125         st->print_cr("<misaligned>");
 126       } else {
 127         st->print_cr(INTPTR_FORMAT, *src);
 128       }
 129     }
 130   }
 131 }
 132 
 133 void RegisterMap::print() const {
 134   print_on(tty);
 135 }
 136 
 137 #endif
 138 // This returns the pc that if you were in the debugger you'd see. Not
 139 // the idealized value in the frame object. This undoes the magic conversion
 140 // that happens for deoptimized frames. In addition it makes the value the
 141 // hardware would want to see in the native frame. The only user (at this point)
 142 // is deoptimization. It likely no one else should ever use it.
 143 
 144 address 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 //
 159 void 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
 174 bool frame::is_ignored_frame() const {
 175   return false;  // FIXME: some LambdaForm frames should be ignored
 176 }
 177 bool frame::is_deoptimized_frame() const {
 178   assert(_deopt_state != unknown, "not answerable");
 179   return _deopt_state == is_deoptimized;
 180 }
 181 
 182 bool frame::is_native_frame() const {
 183   return (_cb != NULL &&
 184           _cb->is_nmethod() &&
 185           ((nmethod*)_cb)->is_native_method());
 186 }
 187 
 188 bool 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 
 195 bool 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 
 205 bool frame::is_runtime_frame() const {
 206   return (_cb != NULL && _cb->is_runtime_stub());
 207 }
 208 
 209 bool frame::is_safepoint_blob_frame() const {
 210   return (_cb != NULL && _cb->is_safepoint_stub());
 211 }
 212 
 213 // testers
 214 
 215 bool 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 
 223 bool frame::entry_frame_is_first() const {
 224   return entry_frame_call_wrapper()->anchor()->last_Java_sp() == NULL;
 225 }
 226 
 227 
 228 bool 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 
 247 bool 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 
 257 void 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 
 339 frame 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 
 347 frame 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
 357 frame 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 
 382 void 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 
 387 Method* 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 
 395 void frame::interpreter_frame_set_method(Method* method) {
 396   assert(is_interpreted_frame(), "interpreted frame expected");
 397   *interpreter_frame_method_addr() = method;
 398 }
 399 
 400 void 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 
 436 jint 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 
 442 void 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 
 448 address 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 
 454 void 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 
 460 void 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 
 466 address 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 
 476 void 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 
 487 BasicObjectLock* 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 
 496 BasicObjectLock* 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 
 508 intptr_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 
 513 intptr_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 
 519 jint 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 
 535 const 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 
 546 void 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 
 589 void 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 
 597 void 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.
 644 static 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 
 692 void 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 */
 745 class 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 
 788 class 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
 841 class 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 
 876 oop* 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 
 883 void 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 
 981 void 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 
 986 void 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 
1006 class 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     }
1057   }
1058 };
1059 
1060 void frame::oops_compiled_arguments_do(Symbol* signature, bool has_receiver, bool has_appendix, const RegisterMap* reg_map, OopClosure* f) {
1061   ResourceMark rm;
1062   CompiledArgumentOopFinder finder(signature, has_receiver, has_appendix, f, *this, reg_map);
1063   finder.oops_do();
1064 }
1065 
1066 
1067 // Get receiver out of callers frame, i.e. find parameter 0 in callers
1068 // frame.  Consult ADLC for where parameter 0 is to be found.  Then
1069 // check local reg_map for it being a callee-save register or argument
1070 // register, both of which are saved in the local frame.  If not found
1071 // there, it must be an in-stack argument of the caller.
1072 // Note: caller.sp() points to callee-arguments
1073 oop frame::retrieve_receiver(RegisterMap* reg_map) {
1074   frame caller = *this;
1075 
1076   // First consult the ADLC on where it puts parameter 0 for this signature.
1077   VMReg reg = SharedRuntime::name_for_receiver();
1078   oop* oop_adr = caller.oopmapreg_to_location(reg, reg_map);
1079   if (oop_adr == NULL) {
1080     guarantee(oop_adr != NULL, "bad register save location");
1081     return NULL;
1082   }
1083   oop r = *oop_adr;
1084   assert(Universe::heap()->is_in_or_null(r), err_msg("bad receiver: " INTPTR_FORMAT " (" INTX_FORMAT ")", (intptr_t) r, (intptr_t) r));
1085   return r;
1086 }
1087 
1088 
1089 oop* frame::oopmapreg_to_location(VMReg reg, const RegisterMap* reg_map) const {
1090   if(reg->is_reg()) {
1091     // If it is passed in a register, it got spilled in the stub frame.
1092     return (oop *)reg_map->location(reg);
1093   } else {
1094     int sp_offset_in_bytes = reg->reg2stack() * VMRegImpl::stack_slot_size;
1095     return (oop*)(((address)unextended_sp()) + sp_offset_in_bytes);
1096   }
1097 }
1098 
1099 BasicLock* frame::get_native_monitor() {
1100   nmethod* nm = (nmethod*)_cb;
1101   assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1102          "Should not call this unless it's a native nmethod");
1103   int byte_offset = in_bytes(nm->native_basic_lock_sp_offset());
1104   assert(byte_offset >= 0, "should not see invalid offset");
1105   return (BasicLock*) &sp()[byte_offset / wordSize];
1106 }
1107 
1108 oop frame::get_native_receiver() {
1109   nmethod* nm = (nmethod*)_cb;
1110   assert(_cb != NULL && _cb->is_nmethod() && nm->method()->is_native(),
1111          "Should not call this unless it's a native nmethod");
1112   int byte_offset = in_bytes(nm->native_receiver_sp_offset());
1113   assert(byte_offset >= 0, "should not see invalid offset");
1114   oop owner = ((oop*) sp())[byte_offset / wordSize];
1115   assert( Universe::heap()->is_in(owner), "bad receiver" );
1116   return owner;
1117 }
1118 
1119 void frame::oops_entry_do(OopClosure* f, const RegisterMap* map) {
1120   assert(map != NULL, "map must be set");
1121   if (map->include_argument_oops()) {
1122     // must collect argument oops, as nobody else is doing it
1123     Thread *thread = Thread::current();
1124     methodHandle m (thread, entry_frame_call_wrapper()->callee_method());
1125     EntryFrameOopFinder finder(this, m->signature(), m->is_static());
1126     finder.arguments_do(f);
1127   }
1128   // Traverse the Handle Block saved in the entry frame
1129   entry_frame_call_wrapper()->oops_do(f);
1130 }
1131 
1132 
1133 void frame::oops_do_internal(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf, RegisterMap* map, bool use_interpreter_oop_map_cache) {
1134 #ifndef PRODUCT
1135   // simulate GC crash here to dump java thread in error report
1136   if (CrashGCForDumpingJavaThread) {
1137     char *t = NULL;
1138     *t = 'c';
1139   }
1140 #endif
1141   if (is_interpreted_frame()) {
1142     oops_interpreted_do(f, cld_f, map, use_interpreter_oop_map_cache);
1143   } else if (is_entry_frame()) {
1144     oops_entry_do(f, map);
1145   } else if (CodeCache::contains(pc())) {
1146     oops_code_blob_do(f, cf, map);
1147 #ifdef SHARK
1148   } else if (is_fake_stub_frame()) {
1149     // nothing to do
1150 #endif // SHARK
1151   } else {
1152     ShouldNotReachHere();
1153   }
1154 }
1155 
1156 void frame::nmethods_do(CodeBlobClosure* cf) {
1157   if (_cb != NULL && _cb->is_nmethod()) {
1158     cf->do_code_blob(_cb);
1159   }
1160 }
1161 
1162 
1163 // call f() on the interpreted Method*s in the stack.
1164 // Have to walk the entire code cache for the compiled frames Yuck.
1165 void frame::metadata_do(void f(Metadata*)) {
1166   if (_cb != NULL && Interpreter::contains(pc())) {
1167     Method* m = this->interpreter_frame_method();
1168     assert(m != NULL, "huh?");
1169     f(m);
1170   }
1171 }
1172 
1173 void frame::gc_prologue() {
1174   if (is_interpreted_frame()) {
1175     // set bcx to bci to become Method* position independent during GC
1176     interpreter_frame_set_bcx(interpreter_frame_bci());
1177   }
1178 }
1179 
1180 
1181 void frame::gc_epilogue() {
1182   if (is_interpreted_frame()) {
1183     // set bcx back to bcp for interpreter
1184     interpreter_frame_set_bcx((intptr_t)interpreter_frame_bcp());
1185   }
1186   // call processor specific epilog function
1187   pd_gc_epilog();
1188 }
1189 
1190 
1191 # ifdef ENABLE_ZAP_DEAD_LOCALS
1192 
1193 void frame::CheckValueClosure::do_oop(oop* p) {
1194   if (CheckOopishValues && Universe::heap()->is_in_reserved(*p)) {
1195     warning("value @ " INTPTR_FORMAT " looks oopish (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1196   }
1197 }
1198 frame::CheckValueClosure frame::_check_value;
1199 
1200 
1201 void frame::CheckOopClosure::do_oop(oop* p) {
1202   if (*p != NULL && !(*p)->is_oop()) {
1203     warning("value @ " INTPTR_FORMAT " should be an oop (" INTPTR_FORMAT ") (thread = " INTPTR_FORMAT ")", p, (address)*p, Thread::current());
1204  }
1205 }
1206 frame::CheckOopClosure frame::_check_oop;
1207 
1208 void frame::check_derived_oop(oop* base, oop* derived) {
1209   _check_oop.do_oop(base);
1210 }
1211 
1212 
1213 void frame::ZapDeadClosure::do_oop(oop* p) {
1214   if (TraceZapDeadLocals) tty->print_cr("zapping @ " INTPTR_FORMAT " containing " INTPTR_FORMAT, p, (address)*p);
1215   // Need cast because on _LP64 the conversion to oop is ambiguous.  Constant
1216   // can be either long or int.
1217   *p = (oop)(int)0xbabebabe;
1218 }
1219 frame::ZapDeadClosure frame::_zap_dead;
1220 
1221 void frame::zap_dead_locals(JavaThread* thread, const RegisterMap* map) {
1222   assert(thread == Thread::current(), "need to synchronize to do this to another thread");
1223   // Tracing - part 1
1224   if (TraceZapDeadLocals) {
1225     ResourceMark rm(thread);
1226     tty->print_cr("--------------------------------------------------------------------------------");
1227     tty->print("Zapping dead locals in ");
1228     print_on(tty);
1229     tty->cr();
1230   }
1231   // Zapping
1232        if (is_entry_frame      ()) zap_dead_entry_locals      (thread, map);
1233   else if (is_interpreted_frame()) zap_dead_interpreted_locals(thread, map);
1234   else if (is_compiled_frame()) zap_dead_compiled_locals   (thread, map);
1235 
1236   else
1237     // could be is_runtime_frame
1238     // so remove error: ShouldNotReachHere();
1239     ;
1240   // Tracing - part 2
1241   if (TraceZapDeadLocals) {
1242     tty->cr();
1243   }
1244 }
1245 
1246 
1247 void frame::zap_dead_interpreted_locals(JavaThread *thread, const RegisterMap* map) {
1248   // get current interpreter 'pc'
1249   assert(is_interpreted_frame(), "Not an interpreted frame");
1250   Method* m   = interpreter_frame_method();
1251   int       bci = interpreter_frame_bci();
1252 
1253   int max_locals = m->is_native() ? m->size_of_parameters() : m->max_locals();
1254 
1255   // process dynamic part
1256   InterpreterFrameClosure value_blk(this, max_locals, m->max_stack(),
1257                                     &_check_value);
1258   InterpreterFrameClosure   oop_blk(this, max_locals, m->max_stack(),
1259                                     &_check_oop  );
1260   InterpreterFrameClosure  dead_blk(this, max_locals, m->max_stack(),
1261                                     &_zap_dead   );
1262 
1263   // get frame map
1264   InterpreterOopMap mask;
1265   m->mask_for(bci, &mask);
1266   mask.iterate_all( &oop_blk, &value_blk, &dead_blk);
1267 }
1268 
1269 
1270 void frame::zap_dead_compiled_locals(JavaThread* thread, const RegisterMap* reg_map) {
1271 
1272   ResourceMark rm(thread);
1273   assert(_cb != NULL, "sanity check");
1274   if (_cb->oop_maps() != NULL) {
1275     OopMapSet::all_do(this, reg_map, &_check_oop, check_derived_oop, &_check_value);
1276   }
1277 }
1278 
1279 
1280 void frame::zap_dead_entry_locals(JavaThread*, const RegisterMap*) {
1281   if (TraceZapDeadLocals) warning("frame::zap_dead_entry_locals unimplemented");
1282 }
1283 
1284 
1285 void frame::zap_dead_deoptimized_locals(JavaThread*, const RegisterMap*) {
1286   if (TraceZapDeadLocals) warning("frame::zap_dead_deoptimized_locals unimplemented");
1287 }
1288 
1289 # endif // ENABLE_ZAP_DEAD_LOCALS
1290 
1291 void frame::verify(const RegisterMap* map) {
1292   // for now make sure receiver type is correct
1293   if (is_interpreted_frame()) {
1294     Method* method = interpreter_frame_method();
1295     guarantee(method->is_method(), "method is wrong in frame::verify");
1296     if (!method->is_static()) {
1297       // fetch the receiver
1298       oop* p = (oop*) interpreter_frame_local_at(0);
1299       // make sure we have the right receiver type
1300     }
1301   }
1302   COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), "must be empty before verify");)
1303   oops_do_internal(&VerifyOopClosure::verify_oop, NULL, NULL, (RegisterMap*)map, false);
1304 }
1305 
1306 
1307 #ifdef ASSERT
1308 bool frame::verify_return_pc(address x) {
1309   if (StubRoutines::returns_to_call_stub(x)) {
1310     return true;
1311   }
1312   if (CodeCache::contains(x)) {
1313     return true;
1314   }
1315   if (Interpreter::contains(x)) {
1316     return true;
1317   }
1318   return false;
1319 }
1320 #endif
1321 
1322 #ifdef ASSERT
1323 void frame::interpreter_frame_verify_monitor(BasicObjectLock* value) const {
1324   assert(is_interpreted_frame(), "Not an interpreted frame");
1325   // verify that the value is in the right part of the frame
1326   address low_mark  = (address) interpreter_frame_monitor_end();
1327   address high_mark = (address) interpreter_frame_monitor_begin();
1328   address current   = (address) value;
1329 
1330   const int monitor_size = frame::interpreter_frame_monitor_size();
1331   guarantee((high_mark - current) % monitor_size  ==  0         , "Misaligned top of BasicObjectLock*");
1332   guarantee( high_mark > current                                , "Current BasicObjectLock* higher than high_mark");
1333 
1334   guarantee((current - low_mark) % monitor_size  ==  0         , "Misaligned bottom of BasicObjectLock*");
1335   guarantee( current >= low_mark                               , "Current BasicObjectLock* below than low_mark");
1336 }
1337 #endif
1338 
1339 #ifndef PRODUCT
1340 void frame::describe(FrameValues& values, int frame_no) {
1341   // boundaries: sp and the 'real' frame pointer
1342   values.describe(-1, sp(), err_msg("sp for #%d", frame_no), 1);
1343   intptr_t* frame_pointer = real_fp(); // Note: may differ from fp()
1344 
1345   // print frame info at the highest boundary
1346   intptr_t* info_address = MAX2(sp(), frame_pointer);
1347 
1348   if (info_address != frame_pointer) {
1349     // print frame_pointer explicitly if not marked by the frame info
1350     values.describe(-1, frame_pointer, err_msg("frame pointer for #%d", frame_no), 1);
1351   }
1352 
1353   if (is_entry_frame() || is_compiled_frame() || is_interpreted_frame() || is_native_frame()) {
1354     // Label values common to most frames
1355     values.describe(-1, unextended_sp(), err_msg("unextended_sp for #%d", frame_no));
1356   }
1357 
1358   if (is_interpreted_frame()) {
1359     Method* m = interpreter_frame_method();
1360     int bci = interpreter_frame_bci();
1361 
1362     // Label the method and current bci
1363     values.describe(-1, info_address,
1364                     FormatBuffer<1024>("#%d method %s @ %d", frame_no, m->name_and_sig_as_C_string(), bci), 2);
1365     values.describe(-1, info_address,
1366                     err_msg("- %d locals %d max stack", m->max_locals(), m->max_stack()), 1);
1367     if (m->max_locals() > 0) {
1368       intptr_t* l0 = interpreter_frame_local_at(0);
1369       intptr_t* ln = interpreter_frame_local_at(m->max_locals() - 1);
1370       values.describe(-1, MAX2(l0, ln), err_msg("locals for #%d", frame_no), 1);
1371       // Report each local and mark as owned by this frame
1372       for (int l = 0; l < m->max_locals(); l++) {
1373         intptr_t* l0 = interpreter_frame_local_at(l);
1374         values.describe(frame_no, l0, err_msg("local %d", l));
1375       }
1376     }
1377 
1378     // Compute the actual expression stack size
1379     InterpreterOopMap mask;
1380     OopMapCache::compute_one_oop_map(m, bci, &mask);
1381     intptr_t* tos = NULL;
1382     // Report each stack element and mark as owned by this frame
1383     for (int e = 0; e < mask.expression_stack_size(); e++) {
1384       tos = MAX2(tos, interpreter_frame_expression_stack_at(e));
1385       values.describe(frame_no, interpreter_frame_expression_stack_at(e),
1386                       err_msg("stack %d", e));
1387     }
1388     if (tos != NULL) {
1389       values.describe(-1, tos, err_msg("expression stack for #%d", frame_no), 1);
1390     }
1391     if (interpreter_frame_monitor_begin() != interpreter_frame_monitor_end()) {
1392       values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_begin(), "monitors begin");
1393       values.describe(frame_no, (intptr_t*)interpreter_frame_monitor_end(), "monitors end");
1394     }
1395   } else if (is_entry_frame()) {
1396     // For now just label the frame
1397     values.describe(-1, info_address, err_msg("#%d entry frame", frame_no), 2);
1398   } else if (is_compiled_frame()) {
1399     // For now just label the frame
1400     nmethod* nm = cb()->as_nmethod_or_null();
1401     values.describe(-1, info_address,
1402                     FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for method %s%s", frame_no,
1403                                        nm, nm->method()->name_and_sig_as_C_string(),
1404                                        (_deopt_state == is_deoptimized) ?
1405                                        " (deoptimized)" :
1406                                        ((_deopt_state == unknown) ? " (state unknown)" : "")),
1407                     2);
1408   } else if (is_native_frame()) {
1409     // For now just label the frame
1410     nmethod* nm = cb()->as_nmethod_or_null();
1411     values.describe(-1, info_address,
1412                     FormatBuffer<1024>("#%d nmethod " INTPTR_FORMAT " for native method %s", frame_no,
1413                                        nm, nm->method()->name_and_sig_as_C_string()), 2);
1414   } else {
1415     // provide default info if not handled before
1416     char *info = (char *) "special frame";
1417     if ((_cb != NULL) &&
1418         (_cb->name() != NULL)) {
1419       info = (char *)_cb->name();
1420     }
1421     values.describe(-1, info_address, err_msg("#%d <%s>", frame_no, info), 2);
1422   }
1423 
1424   // platform dependent additional data
1425   describe_pd(values, frame_no);
1426 }
1427 
1428 #endif
1429 
1430 
1431 //-----------------------------------------------------------------------------------
1432 // StackFrameStream implementation
1433 
1434 StackFrameStream::StackFrameStream(JavaThread *thread, bool update) : _reg_map(thread, update) {
1435   assert(thread->has_last_Java_frame(), "sanity check");
1436   _fr = thread->last_frame();
1437   _is_done = false;
1438 }
1439 
1440 
1441 #ifndef PRODUCT
1442 
1443 void FrameValues::describe(int owner, intptr_t* location, const char* description, int priority) {
1444   FrameValue fv;
1445   fv.location = location;
1446   fv.owner = owner;
1447   fv.priority = priority;
1448   fv.description = NEW_RESOURCE_ARRAY(char, strlen(description) + 1);
1449   strcpy(fv.description, description);
1450   _values.append(fv);
1451 }
1452 
1453 
1454 #ifdef ASSERT
1455 void FrameValues::validate() {
1456   _values.sort(compare);
1457   bool error = false;
1458   FrameValue prev;
1459   prev.owner = -1;
1460   for (int i = _values.length() - 1; i >= 0; i--) {
1461     FrameValue fv = _values.at(i);
1462     if (fv.owner == -1) continue;
1463     if (prev.owner == -1) {
1464       prev = fv;
1465       continue;
1466     }
1467     if (prev.location == fv.location) {
1468       if (fv.owner != prev.owner) {
1469         tty->print_cr("overlapping storage");
1470         tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", prev.location, *prev.location, prev.description);
1471         tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1472         error = true;
1473       }
1474     } else {
1475       prev = fv;
1476     }
1477   }
1478   assert(!error, "invalid layout");
1479 }
1480 #endif // ASSERT
1481 
1482 void FrameValues::print(JavaThread* thread) {
1483   _values.sort(compare);
1484 
1485   // Sometimes values like the fp can be invalid values if the
1486   // register map wasn't updated during the walk.  Trim out values
1487   // that aren't actually in the stack of the thread.
1488   int min_index = 0;
1489   int max_index = _values.length() - 1;
1490   intptr_t* v0 = _values.at(min_index).location;
1491   intptr_t* v1 = _values.at(max_index).location;
1492 
1493   if (thread == Thread::current()) {
1494     while (!thread->is_in_stack((address)v0)) {
1495       v0 = _values.at(++min_index).location;
1496     }
1497     while (!thread->is_in_stack((address)v1)) {
1498       v1 = _values.at(--max_index).location;
1499     }
1500   } else {
1501     while (!thread->on_local_stack((address)v0)) {
1502       v0 = _values.at(++min_index).location;
1503     }
1504     while (!thread->on_local_stack((address)v1)) {
1505       v1 = _values.at(--max_index).location;
1506     }
1507   }
1508   intptr_t* min = MIN2(v0, v1);
1509   intptr_t* max = MAX2(v0, v1);
1510   intptr_t* cur = max;
1511   intptr_t* last = NULL;
1512   for (int i = max_index; i >= min_index; i--) {
1513     FrameValue fv = _values.at(i);
1514     while (cur > fv.location) {
1515       tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT, cur, *cur);
1516       cur--;
1517     }
1518     if (last == fv.location) {
1519       const char* spacer = "          " LP64_ONLY("        ");
1520       tty->print_cr(" %s  %s %s", spacer, spacer, fv.description);
1521     } else {
1522       tty->print_cr(" " INTPTR_FORMAT ": " INTPTR_FORMAT " %s", fv.location, *fv.location, fv.description);
1523       last = fv.location;
1524       cur--;
1525     }
1526   }
1527 }
1528 
1529 #endif // ndef PRODUCT
--- EOF ---