1 /*
   2  * Copyright (c) 1998, 2018, 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 "jvm.h"
  27 #include "code/codeBlob.hpp"
  28 #include "code/codeCache.hpp"
  29 #include "code/relocInfo.hpp"
  30 #include "compiler/disassembler.hpp"
  31 #include "interpreter/bytecode.hpp"
  32 #include "memory/allocation.inline.hpp"
  33 #include "memory/heap.hpp"
  34 #include "memory/resourceArea.hpp"
  35 #include "oops/oop.inline.hpp"
  36 #include "prims/forte.hpp"
  37 #include "runtime/handles.inline.hpp"
  38 #include "runtime/interfaceSupport.inline.hpp"
  39 #include "runtime/mutexLocker.hpp"
  40 #include "runtime/safepoint.hpp"
  41 #include "runtime/sharedRuntime.hpp"
  42 #include "runtime/vframe.hpp"
  43 #include "services/memoryService.hpp"
  44 #include "utilities/align.hpp"
  45 #ifdef COMPILER1
  46 #include "c1/c1_Runtime1.hpp"
  47 #endif
  48 
  49 const char* CodeBlob::compiler_name() const {
  50   return compilertype2name(_type);
  51 }
  52 
  53 unsigned int CodeBlob::align_code_offset(int offset) {
  54   // align the size to CodeEntryAlignment
  55   return
  56     ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))
  57     - (int)CodeHeap::header_size();
  58 }
  59 
  60 
  61 // This must be consistent with the CodeBlob constructor's layout actions.
  62 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
  63   unsigned int size = header_size;
  64   size += align_up(cb->total_relocation_size(), oopSize);
  65   // align the size to CodeEntryAlignment
  66   size = align_code_offset(size);
  67   size += align_up(cb->total_content_size(), oopSize);
  68   size += align_up(cb->total_oop_size(), oopSize);
  69   size += align_up(cb->total_metadata_size(), oopSize);
  70   return size;
  71 }
  72 
  73 CodeBlob::CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset, int frame_size, ImmutableOopMapSet* oop_maps, bool caller_must_gc_arguments) :
  74   _name(name),
  75   _size(layout.size()),
  76   _header_size(layout.header_size()),
  77   _frame_complete_offset(frame_complete_offset),
  78   _data_offset(layout.data_offset()),
  79   _frame_size(frame_size),
  80   _strings(CodeStrings()),
  81   _oop_maps(oop_maps),
  82   _caller_must_gc_arguments(caller_must_gc_arguments),
  83   _code_begin(layout.code_begin()),
  84   _code_end(layout.code_end()),
  85   _data_end(layout.data_end()),
  86   _relocation_begin(layout.relocation_begin()),
  87   _relocation_end(layout.relocation_end()),
  88   _content_begin(layout.content_begin()),
  89   _type(type)
  90 {
  91   assert(is_aligned(layout.size(),            oopSize), "unaligned size");
  92   assert(is_aligned(layout.header_size(),     oopSize), "unaligned size");
  93   assert(is_aligned(layout.relocation_size(), oopSize), "unaligned size");
  94   assert(layout.code_end() == layout.content_end(), "must be the same - see code_end()");
  95 #ifdef COMPILER1
  96   // probably wrong for tiered
  97   assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
  98 #endif // COMPILER1
  99 }
 100 
 101 CodeBlob::CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, CodeBuffer* cb, int frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) :
 102   _name(name),
 103   _size(layout.size()),
 104   _header_size(layout.header_size()),
 105   _frame_complete_offset(frame_complete_offset),
 106   _data_offset(layout.data_offset()),
 107   _frame_size(frame_size),
 108   _strings(CodeStrings()),
 109   _caller_must_gc_arguments(caller_must_gc_arguments),
 110   _code_begin(layout.code_begin()),
 111   _code_end(layout.code_end()),
 112   _data_end(layout.data_end()),
 113   _relocation_begin(layout.relocation_begin()),
 114   _relocation_end(layout.relocation_end()),
 115   _content_begin(layout.content_begin()),
 116   _type(type)
 117 {
 118   assert(is_aligned(_size,        oopSize), "unaligned size");
 119   assert(is_aligned(_header_size, oopSize), "unaligned size");
 120   assert(_data_offset <= _size, "codeBlob is too small");
 121   assert(layout.code_end() == layout.content_end(), "must be the same - see code_end()");
 122 
 123   set_oop_maps(oop_maps);
 124 #ifdef COMPILER1
 125   // probably wrong for tiered
 126   assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
 127 #endif // COMPILER1
 128 }
 129 
 130 
 131 // Creates a simple CodeBlob. Sets up the size of the different regions.
 132 RuntimeBlob::RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size)
 133   : CodeBlob(name, compiler_none, CodeBlobLayout((address) this, size, header_size, locs_size, size), frame_complete, 0, NULL, false /* caller_must_gc_arguments */)
 134 {
 135   assert(is_aligned(locs_size, oopSize), "unaligned size");
 136 }
 137 
 138 
 139 // Creates a RuntimeBlob from a CodeBuffer
 140 // and copy code and relocation info.
 141 RuntimeBlob::RuntimeBlob(
 142   const char* name,
 143   CodeBuffer* cb,
 144   int         header_size,
 145   int         size,
 146   int         frame_complete,
 147   int         frame_size,
 148   OopMapSet*  oop_maps,
 149   bool        caller_must_gc_arguments
 150 ) : CodeBlob(name, compiler_none, CodeBlobLayout((address) this, size, header_size, cb), cb, frame_complete, frame_size, oop_maps, caller_must_gc_arguments) {
 151   cb->copy_code_and_locs_to(this);
 152 }
 153 
 154 void CodeBlob::flush() {
 155   if (_oop_maps) {
 156     FREE_C_HEAP_ARRAY(unsigned char, _oop_maps);
 157     _oop_maps = NULL;
 158   }
 159   _strings.free();
 160 }
 161 
 162 void CodeBlob::set_oop_maps(OopMapSet* p) {
 163   // Danger Will Robinson! This method allocates a big
 164   // chunk of memory, its your job to free it.
 165   if (p != NULL) {
 166     _oop_maps = ImmutableOopMapSet::build_from(p);
 167   } else {
 168     _oop_maps = NULL;
 169   }
 170 }
 171 
 172 
 173 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
 174   // Do not hold the CodeCache lock during name formatting.
 175   assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
 176 
 177   if (stub != NULL) {
 178     char stub_id[256];
 179     assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
 180     jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
 181     if (PrintStubCode) {
 182       ttyLocker ttyl;
 183       tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);
 184       Disassembler::decode(stub->code_begin(), stub->code_end());
 185       tty->cr();
 186     }
 187     Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
 188 
 189     if (JvmtiExport::should_post_dynamic_code_generated()) {
 190       const char* stub_name = name2;
 191       if (name2[0] == '\0')  stub_name = name1;
 192       JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
 193     }
 194   }
 195 
 196   // Track memory usage statistic after releasing CodeCache_lock
 197   MemoryService::track_code_cache_memory_usage();
 198 }
 199 
 200 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) {
 201   assert(_oop_maps != NULL, "nope");
 202   return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
 203 }
 204 
 205 void CodeBlob::print_code() {
 206   ResourceMark m;
 207   Disassembler::decode(this, tty);
 208 }
 209 
 210 //----------------------------------------------------------------------------------------------------
 211 // Implementation of BufferBlob
 212 
 213 
 214 BufferBlob::BufferBlob(const char* name, int size)
 215 : RuntimeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)
 216 {}
 217 
 218 BufferBlob* BufferBlob::create(const char* name, int buffer_size) {
 219   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 220 
 221   BufferBlob* blob = NULL;
 222   unsigned int size = sizeof(BufferBlob);
 223   // align the size to CodeEntryAlignment
 224   size = CodeBlob::align_code_offset(size);
 225   size += align_up(buffer_size, oopSize);
 226   assert(name != NULL, "must provide a name");
 227   {
 228     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 229     blob = new (size) BufferBlob(name, size);
 230   }
 231   // Track memory usage statistic after releasing CodeCache_lock
 232   MemoryService::track_code_cache_memory_usage();
 233 
 234   return blob;
 235 }
 236 
 237 
 238 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)
 239   : RuntimeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)
 240 {}
 241 
 242 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
 243   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 244 
 245   BufferBlob* blob = NULL;
 246   unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
 247   assert(name != NULL, "must provide a name");
 248   {
 249     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 250     blob = new (size) BufferBlob(name, size, cb);
 251   }
 252   // Track memory usage statistic after releasing CodeCache_lock
 253   MemoryService::track_code_cache_memory_usage();
 254 
 255   return blob;
 256 }
 257 
 258 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
 259   return CodeCache::allocate(size, CodeBlobType::NonNMethod);
 260 }
 261 
 262 void BufferBlob::free(BufferBlob *blob) {
 263   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 264   blob->flush();
 265   {
 266     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 267     CodeCache::free((RuntimeBlob*)blob);
 268   }
 269   // Track memory usage statistic after releasing CodeCache_lock
 270   MemoryService::track_code_cache_memory_usage();
 271 }
 272 
 273 
 274 //----------------------------------------------------------------------------------------------------
 275 // Implementation of AdapterBlob
 276 
 277 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :
 278   BufferBlob("I2C/C2I adapters", size, cb) {
 279   CodeCache::commit(this);
 280 }
 281 
 282 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
 283   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 284 
 285   AdapterBlob* blob = NULL;
 286   unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
 287   {
 288     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 289     blob = new (size) AdapterBlob(size, cb);
 290   }
 291   // Track memory usage statistic after releasing CodeCache_lock
 292   MemoryService::track_code_cache_memory_usage();
 293 
 294   return blob;
 295 }
 296 
 297 VtableBlob::VtableBlob(const char* name, int size) :
 298   BufferBlob(name, size) {
 299 }
 300 
 301 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
 302   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 303 
 304   VtableBlob* blob = NULL;
 305   unsigned int size = sizeof(VtableBlob);
 306   // align the size to CodeEntryAlignment
 307   size = align_code_offset(size);
 308   size += align_up(buffer_size, oopSize);
 309   assert(name != NULL, "must provide a name");
 310   {
 311     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 312     blob = new (size) VtableBlob(name, size);
 313   }
 314   // Track memory usage statistic after releasing CodeCache_lock
 315   MemoryService::track_code_cache_memory_usage();
 316 
 317   return blob;
 318 }
 319 
 320 //----------------------------------------------------------------------------------------------------
 321 // Implementation of MethodHandlesAdapterBlob
 322 
 323 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
 324   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 325 
 326   MethodHandlesAdapterBlob* blob = NULL;
 327   unsigned int size = sizeof(MethodHandlesAdapterBlob);
 328   // align the size to CodeEntryAlignment
 329   size = CodeBlob::align_code_offset(size);
 330   size += align_up(buffer_size, oopSize);
 331   {
 332     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 333     blob = new (size) MethodHandlesAdapterBlob(size);
 334     if (blob == NULL) {
 335       vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
 336     }
 337   }
 338   // Track memory usage statistic after releasing CodeCache_lock
 339   MemoryService::track_code_cache_memory_usage();
 340 
 341   return blob;
 342 }
 343 
 344 //----------------------------------------------------------------------------------------------------
 345 // Implementation of RuntimeStub
 346 
 347 RuntimeStub::RuntimeStub(
 348   const char* name,
 349   CodeBuffer* cb,
 350   int         size,
 351   int         frame_complete,
 352   int         frame_size,
 353   OopMapSet*  oop_maps,
 354   bool        caller_must_gc_arguments
 355 )
 356 : RuntimeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
 357 {
 358 }
 359 
 360 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
 361                                            CodeBuffer* cb,
 362                                            int frame_complete,
 363                                            int frame_size,
 364                                            OopMapSet* oop_maps,
 365                                            bool caller_must_gc_arguments)
 366 {
 367   RuntimeStub* stub = NULL;
 368   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 369   {
 370     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 371     unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
 372     stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
 373   }
 374 
 375   trace_new_stub(stub, "RuntimeStub - ", stub_name);
 376 
 377   return stub;
 378 }
 379 
 380 
 381 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
 382   void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
 383   if (!p) fatal("Initial size of CodeCache is too small");
 384   return p;
 385 }
 386 
 387 // operator new shared by all singletons:
 388 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
 389   void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
 390   if (!p) fatal("Initial size of CodeCache is too small");
 391   return p;
 392 }
 393 
 394 
 395 //----------------------------------------------------------------------------------------------------
 396 // Implementation of DeoptimizationBlob
 397 
 398 DeoptimizationBlob::DeoptimizationBlob(
 399   CodeBuffer* cb,
 400   int         size,
 401   OopMapSet*  oop_maps,
 402   int         unpack_offset,
 403   int         unpack_with_exception_offset,
 404   int         unpack_with_reexecution_offset,
 405   int         frame_size
 406 )
 407 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)
 408 {
 409   _unpack_offset           = unpack_offset;
 410   _unpack_with_exception   = unpack_with_exception_offset;
 411   _unpack_with_reexecution = unpack_with_reexecution_offset;
 412 #ifdef COMPILER1
 413   _unpack_with_exception_in_tls   = -1;
 414 #endif
 415 }
 416 
 417 
 418 DeoptimizationBlob* DeoptimizationBlob::create(
 419   CodeBuffer* cb,
 420   OopMapSet*  oop_maps,
 421   int        unpack_offset,
 422   int        unpack_with_exception_offset,
 423   int        unpack_with_reexecution_offset,
 424   int        frame_size)
 425 {
 426   DeoptimizationBlob* blob = NULL;
 427   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 428   {
 429     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 430     unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
 431     blob = new (size) DeoptimizationBlob(cb,
 432                                          size,
 433                                          oop_maps,
 434                                          unpack_offset,
 435                                          unpack_with_exception_offset,
 436                                          unpack_with_reexecution_offset,
 437                                          frame_size);
 438   }
 439 
 440   trace_new_stub(blob, "DeoptimizationBlob");
 441 
 442   return blob;
 443 }
 444 
 445 
 446 //----------------------------------------------------------------------------------------------------
 447 // Implementation of UncommonTrapBlob
 448 
 449 #ifdef COMPILER2
 450 UncommonTrapBlob::UncommonTrapBlob(
 451   CodeBuffer* cb,
 452   int         size,
 453   OopMapSet*  oop_maps,
 454   int         frame_size
 455 )
 456 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)
 457 {}
 458 
 459 
 460 UncommonTrapBlob* UncommonTrapBlob::create(
 461   CodeBuffer* cb,
 462   OopMapSet*  oop_maps,
 463   int        frame_size)
 464 {
 465   UncommonTrapBlob* blob = NULL;
 466   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 467   {
 468     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 469     unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
 470     blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
 471   }
 472 
 473   trace_new_stub(blob, "UncommonTrapBlob");
 474 
 475   return blob;
 476 }
 477 
 478 
 479 #endif // COMPILER2
 480 
 481 
 482 //----------------------------------------------------------------------------------------------------
 483 // Implementation of ExceptionBlob
 484 
 485 #ifdef COMPILER2
 486 ExceptionBlob::ExceptionBlob(
 487   CodeBuffer* cb,
 488   int         size,
 489   OopMapSet*  oop_maps,
 490   int         frame_size
 491 )
 492 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)
 493 {}
 494 
 495 
 496 ExceptionBlob* ExceptionBlob::create(
 497   CodeBuffer* cb,
 498   OopMapSet*  oop_maps,
 499   int         frame_size)
 500 {
 501   ExceptionBlob* blob = NULL;
 502   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 503   {
 504     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 505     unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
 506     blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
 507   }
 508 
 509   trace_new_stub(blob, "ExceptionBlob");
 510 
 511   return blob;
 512 }
 513 
 514 
 515 #endif // COMPILER2
 516 
 517 
 518 //----------------------------------------------------------------------------------------------------
 519 // Implementation of SafepointBlob
 520 
 521 SafepointBlob::SafepointBlob(
 522   CodeBuffer* cb,
 523   int         size,
 524   OopMapSet*  oop_maps,
 525   int         frame_size
 526 )
 527 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)
 528 {}
 529 
 530 
 531 SafepointBlob* SafepointBlob::create(
 532   CodeBuffer* cb,
 533   OopMapSet*  oop_maps,
 534   int         frame_size)
 535 {
 536   SafepointBlob* blob = NULL;
 537   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 538   {
 539     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 540     unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
 541     blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
 542   }
 543 
 544   trace_new_stub(blob, "SafepointBlob");
 545 
 546   return blob;
 547 }
 548 
 549 
 550 //----------------------------------------------------------------------------------------------------
 551 // Verification and printing
 552 
 553 void CodeBlob::print_on(outputStream* st) const {
 554   st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
 555   st->print_cr("Framesize: %d", _frame_size);
 556 }
 557 
 558 void CodeBlob::print_value_on(outputStream* st) const {
 559   st->print_cr("[CodeBlob]");
 560 }
 561 
 562 void RuntimeBlob::verify() {
 563   ShouldNotReachHere();
 564 }
 565 
 566 void BufferBlob::verify() {
 567   // unimplemented
 568 }
 569 
 570 void BufferBlob::print_on(outputStream* st) const {
 571   RuntimeBlob::print_on(st);
 572   print_value_on(st);
 573 }
 574 
 575 void BufferBlob::print_value_on(outputStream* st) const {
 576   st->print_cr("BufferBlob (" INTPTR_FORMAT  ") used for %s", p2i(this), name());
 577 }
 578 
 579 void RuntimeStub::verify() {
 580   // unimplemented
 581 }
 582 
 583 void RuntimeStub::print_on(outputStream* st) const {
 584   ttyLocker ttyl;
 585   RuntimeBlob::print_on(st);
 586   st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
 587   st->print_cr("%s", name());
 588   Disassembler::decode((RuntimeBlob*)this, st);
 589 }
 590 
 591 void RuntimeStub::print_value_on(outputStream* st) const {
 592   st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
 593 }
 594 
 595 void SingletonBlob::verify() {
 596   // unimplemented
 597 }
 598 
 599 void SingletonBlob::print_on(outputStream* st) const {
 600   ttyLocker ttyl;
 601   RuntimeBlob::print_on(st);
 602   st->print_cr("%s", name());
 603   Disassembler::decode((RuntimeBlob*)this, st);
 604 }
 605 
 606 void SingletonBlob::print_value_on(outputStream* st) const {
 607   st->print_cr("%s", name());
 608 }
 609 
 610 void DeoptimizationBlob::print_value_on(outputStream* st) const {
 611   st->print_cr("Deoptimization (frame not available)");
 612 }