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 "code/codeBlob.hpp"
  27 #include "code/codeCache.hpp"
  28 #include "code/relocInfo.hpp"
  29 #include "compiler/disassembler.hpp"
  30 #include "interpreter/bytecode.hpp"
  31 #include "memory/allocation.inline.hpp"
  32 #include "memory/heap.hpp"
  33 #include "oops/oop.inline.hpp"
  34 #include "prims/forte.hpp"
  35 #include "runtime/handles.inline.hpp"
  36 #include "runtime/interfaceSupport.hpp"
  37 #include "runtime/mutexLocker.hpp"
  38 #include "runtime/safepoint.hpp"
  39 #include "runtime/sharedRuntime.hpp"
  40 #include "runtime/vframe.hpp"
  41 #include "services/memoryService.hpp"
  42 #ifdef TARGET_ARCH_x86
  43 # include "nativeInst_x86.hpp"
  44 #endif
  45 #ifdef TARGET_ARCH_sparc
  46 # include "nativeInst_sparc.hpp"
  47 #endif
  48 #ifdef TARGET_ARCH_zero
  49 # include "nativeInst_zero.hpp"
  50 #endif
  51 #ifdef TARGET_ARCH_arm
  52 # include "nativeInst_arm.hpp"
  53 #endif
  54 #ifdef TARGET_ARCH_ppc
  55 # include "nativeInst_ppc.hpp"
  56 #endif
  57 #ifdef TARGET_ARCH_aarch32
  58 # include "nativeInst_aarch32.hpp"
  59 #endif
  60 #ifdef COMPILER1
  61 #include "c1/c1_Runtime1.hpp"
  62 #endif
  63 
  64 unsigned int align_code_offset(int offset) {
  65   // align the size to CodeEntryAlignment
  66   return
  67     ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))
  68     - (int)CodeHeap::header_size();
  69 }
  70 
  71 
  72 // This must be consistent with the CodeBlob constructor's layout actions.
  73 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
  74   unsigned int size = header_size;
  75   size += round_to(cb->total_relocation_size(), oopSize);
  76   // align the size to CodeEntryAlignment
  77   size = align_code_offset(size);
  78   size += round_to(cb->total_content_size(), oopSize);
  79   size += round_to(cb->total_oop_size(), oopSize);
  80   size += round_to(cb->total_metadata_size(), oopSize);
  81   return size;
  82 }
  83 
  84 
  85 // Creates a simple CodeBlob. Sets up the size of the different regions.
  86 CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) {
  87   assert(size        == round_to(size,        oopSize), "unaligned size");
  88   assert(locs_size   == round_to(locs_size,   oopSize), "unaligned size");
  89   assert(header_size == round_to(header_size, oopSize), "unaligned size");
  90   assert(!UseRelocIndex, "no space allocated for reloc index yet");
  91 
  92   // Note: If UseRelocIndex is enabled, there needs to be (at least) one
  93   //       extra word for the relocation information, containing the reloc
  94   //       index table length. Unfortunately, the reloc index table imple-
  95   //       mentation is not easily understandable and thus it is not clear
  96   //       what exactly the format is supposed to be. For now, we just turn
  97   //       off the use of this table (gri 7/6/2000).
  98 
  99   _name                  = name;
 100   _size                  = size;
 101   _frame_complete_offset = frame_complete;
 102   _header_size           = header_size;
 103   _relocation_size       = locs_size;
 104   _content_offset        = align_code_offset(header_size + _relocation_size);
 105   _code_offset           = _content_offset;
 106   _data_offset           = size;
 107   _frame_size            =  0;
 108   set_oop_maps(NULL);
 109 }
 110 
 111 
 112 // Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions,
 113 // and copy code and relocation info.
 114 CodeBlob::CodeBlob(
 115   const char* name,
 116   CodeBuffer* cb,
 117   int         header_size,
 118   int         size,
 119   int         frame_complete,
 120   int         frame_size,
 121   OopMapSet*  oop_maps
 122 ) {
 123   assert(size        == round_to(size,        oopSize), "unaligned size");
 124   assert(header_size == round_to(header_size, oopSize), "unaligned size");
 125 
 126   _name                  = name;
 127   _size                  = size;
 128   _frame_complete_offset = frame_complete;
 129   _header_size           = header_size;
 130   _relocation_size       = round_to(cb->total_relocation_size(), oopSize);
 131   _content_offset        = align_code_offset(header_size + _relocation_size);
 132   _code_offset           = _content_offset + cb->total_offset_of(cb->insts());
 133   _data_offset           = _content_offset + round_to(cb->total_content_size(), oopSize);
 134   assert(_data_offset <= size, "codeBlob is too small");
 135 
 136   cb->copy_code_and_locs_to(this);
 137   set_oop_maps(oop_maps);
 138   _frame_size = frame_size;
 139 #ifdef COMPILER1
 140   // probably wrong for tiered
 141   assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
 142 #endif // COMPILER1
 143 }
 144 
 145 
 146 void CodeBlob::set_oop_maps(OopMapSet* p) {
 147   // Danger Will Robinson! This method allocates a big
 148   // chunk of memory, its your job to free it.
 149   if (p != NULL) {
 150     // We need to allocate a chunk big enough to hold the OopMapSet and all of its OopMaps
 151     _oop_maps = (OopMapSet* )NEW_C_HEAP_ARRAY(unsigned char, p->heap_size(), mtCode);
 152     p->copy_to((address)_oop_maps);
 153   } else {
 154     _oop_maps = NULL;
 155   }
 156 }
 157 
 158 
 159 void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) {
 160   // Do not hold the CodeCache lock during name formatting.
 161   assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
 162 
 163   if (stub != NULL) {
 164     char stub_id[256];
 165     assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
 166     jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
 167     if (PrintStubCode) {
 168       ttyLocker ttyl;
 169       tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);
 170       Disassembler::decode(stub->code_begin(), stub->code_end());
 171       tty->cr();
 172     }
 173     Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
 174 
 175     if (JvmtiExport::should_post_dynamic_code_generated()) {
 176       const char* stub_name = name2;
 177       if (name2[0] == '\0')  stub_name = name1;
 178       JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
 179     }
 180   }
 181 
 182   // Track memory usage statistic after releasing CodeCache_lock
 183   MemoryService::track_code_cache_memory_usage();
 184 }
 185 
 186 
 187 void CodeBlob::flush() {
 188   if (_oop_maps) {
 189     FREE_C_HEAP_ARRAY(unsigned char, _oop_maps, mtCode);
 190     _oop_maps = NULL;
 191   }
 192   _strings.free();
 193 }
 194 
 195 
 196 OopMap* CodeBlob::oop_map_for_return_address(address return_address) {
 197   assert(oop_maps() != NULL, "nope");
 198   return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
 199 }
 200 
 201 
 202 //----------------------------------------------------------------------------------------------------
 203 // Implementation of BufferBlob
 204 
 205 
 206 BufferBlob::BufferBlob(const char* name, int size)
 207 : CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)
 208 {}
 209 
 210 BufferBlob* BufferBlob::create(const char* name, int buffer_size) {
 211   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 212 
 213   BufferBlob* blob = NULL;
 214   unsigned int size = sizeof(BufferBlob);
 215   // align the size to CodeEntryAlignment
 216   size = align_code_offset(size);
 217   size += round_to(buffer_size, oopSize);
 218   assert(name != NULL, "must provide a name");
 219   {
 220     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 221     blob = new (size) BufferBlob(name, size);
 222   }
 223   // Track memory usage statistic after releasing CodeCache_lock
 224   MemoryService::track_code_cache_memory_usage();
 225 
 226   return blob;
 227 }
 228 
 229 
 230 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)
 231   : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)
 232 {}
 233 
 234 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
 235   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 236 
 237   BufferBlob* blob = NULL;
 238   unsigned int size = allocation_size(cb, sizeof(BufferBlob));
 239   assert(name != NULL, "must provide a name");
 240   {
 241     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 242     blob = new (size) BufferBlob(name, size, cb);
 243   }
 244   // Track memory usage statistic after releasing CodeCache_lock
 245   MemoryService::track_code_cache_memory_usage();
 246 
 247   return blob;
 248 }
 249 
 250 
 251 void* BufferBlob::operator new(size_t s, unsigned size, bool is_critical) throw() {
 252   void* p = CodeCache::allocate(size, is_critical);
 253   return p;
 254 }
 255 
 256 
 257 void BufferBlob::free( BufferBlob *blob ) {
 258   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 259   blob->flush();
 260   {
 261     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 262     CodeCache::free((CodeBlob*)blob);
 263   }
 264   // Track memory usage statistic after releasing CodeCache_lock
 265   MemoryService::track_code_cache_memory_usage();
 266 }
 267 
 268 
 269 //----------------------------------------------------------------------------------------------------
 270 // Implementation of AdapterBlob
 271 
 272 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :
 273   BufferBlob("I2C/C2I adapters", size, cb) {
 274   CodeCache::commit(this);
 275 }
 276 
 277 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
 278   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 279 
 280   AdapterBlob* blob = NULL;
 281   unsigned int size = allocation_size(cb, sizeof(AdapterBlob));
 282   {
 283     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 284     // The parameter 'true' indicates a critical memory allocation.
 285     // This means that CodeCacheMinimumFreeSpace is used, if necessary
 286     const bool is_critical = true;
 287     blob = new (size, is_critical) AdapterBlob(size, cb);
 288   }
 289   // Track memory usage statistic after releasing CodeCache_lock
 290   MemoryService::track_code_cache_memory_usage();
 291 
 292   return blob;
 293 }
 294 
 295 VtableBlob::VtableBlob(const char* name, int size) :
 296   BufferBlob(name, size) {
 297 }
 298 
 299 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
 300   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 301 
 302   VtableBlob* blob = NULL;
 303   unsigned int size = sizeof(VtableBlob);
 304   // align the size to CodeEntryAlignment
 305   size = align_code_offset(size);
 306   size += round_to(buffer_size, oopSize);
 307   assert(name != NULL, "must provide a name");
 308   {
 309     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 310     blob = new (size) VtableBlob(name, size);
 311   }
 312   // Track memory usage statistic after releasing CodeCache_lock
 313   MemoryService::track_code_cache_memory_usage();
 314 
 315   return blob;
 316 }
 317 
 318 //----------------------------------------------------------------------------------------------------
 319 // Implementation of MethodHandlesAdapterBlob
 320 
 321 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
 322   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 323 
 324   MethodHandlesAdapterBlob* blob = NULL;
 325   unsigned int size = sizeof(MethodHandlesAdapterBlob);
 326   // align the size to CodeEntryAlignment
 327   size = align_code_offset(size);
 328   size += round_to(buffer_size, oopSize);
 329   {
 330     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 331     // The parameter 'true' indicates a critical memory allocation.
 332     // This means that CodeCacheMinimumFreeSpace is used, if necessary
 333     const bool is_critical = true;
 334     blob = new (size, is_critical) MethodHandlesAdapterBlob(size);
 335   }
 336   // Track memory usage statistic after releasing CodeCache_lock
 337   MemoryService::track_code_cache_memory_usage();
 338 
 339   return blob;
 340 }
 341 
 342 
 343 //----------------------------------------------------------------------------------------------------
 344 // Implementation of RuntimeStub
 345 
 346 RuntimeStub::RuntimeStub(
 347   const char* name,
 348   CodeBuffer* cb,
 349   int         size,
 350   int         frame_complete,
 351   int         frame_size,
 352   OopMapSet*  oop_maps,
 353   bool        caller_must_gc_arguments
 354 )
 355 : CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps)
 356 {
 357   _caller_must_gc_arguments = caller_must_gc_arguments;
 358 }
 359 
 360 
 361 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
 362                                            CodeBuffer* cb,
 363                                            int frame_complete,
 364                                            int frame_size,
 365                                            OopMapSet* oop_maps,
 366                                            bool caller_must_gc_arguments)
 367 {
 368   RuntimeStub* stub = NULL;
 369   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 370   {
 371     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 372     unsigned int size = allocation_size(cb, sizeof(RuntimeStub));
 373     stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
 374   }
 375 
 376   trace_new_stub(stub, "RuntimeStub - ", stub_name);
 377 
 378   return stub;
 379 }
 380 
 381 
 382 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
 383   void* p = CodeCache::allocate(size, true);
 384   if (!p) fatal("Initial size of CodeCache is too small");
 385   return p;
 386 }
 387 
 388 // operator new shared by all singletons:
 389 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
 390   void* p = CodeCache::allocate(size, true);
 391   if (!p) fatal("Initial size of CodeCache is too small");
 392   return p;
 393 }
 394 
 395 
 396 //----------------------------------------------------------------------------------------------------
 397 // Implementation of DeoptimizationBlob
 398 
 399 DeoptimizationBlob::DeoptimizationBlob(
 400   CodeBuffer* cb,
 401   int         size,
 402   OopMapSet*  oop_maps,
 403   int         unpack_offset,
 404   int         unpack_with_exception_offset,
 405   int         unpack_with_reexecution_offset,
 406   int         frame_size
 407 )
 408 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)
 409 {
 410   _unpack_offset           = unpack_offset;
 411   _unpack_with_exception   = unpack_with_exception_offset;
 412   _unpack_with_reexecution = unpack_with_reexecution_offset;
 413 #ifdef COMPILER1
 414   _unpack_with_exception_in_tls   = -1;
 415 #endif
 416 }
 417 
 418 
 419 DeoptimizationBlob* DeoptimizationBlob::create(
 420   CodeBuffer* cb,
 421   OopMapSet*  oop_maps,
 422   int        unpack_offset,
 423   int        unpack_with_exception_offset,
 424   int        unpack_with_reexecution_offset,
 425   int        frame_size)
 426 {
 427   DeoptimizationBlob* blob = NULL;
 428   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 429   {
 430     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 431     unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob));
 432     blob = new (size) DeoptimizationBlob(cb,
 433                                          size,
 434                                          oop_maps,
 435                                          unpack_offset,
 436                                          unpack_with_exception_offset,
 437                                          unpack_with_reexecution_offset,
 438                                          frame_size);
 439   }
 440 
 441   trace_new_stub(blob, "DeoptimizationBlob");
 442 
 443   return blob;
 444 }
 445 
 446 
 447 //----------------------------------------------------------------------------------------------------
 448 // Implementation of UncommonTrapBlob
 449 
 450 #ifdef COMPILER2
 451 UncommonTrapBlob::UncommonTrapBlob(
 452   CodeBuffer* cb,
 453   int         size,
 454   OopMapSet*  oop_maps,
 455   int         frame_size
 456 )
 457 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)
 458 {}
 459 
 460 
 461 UncommonTrapBlob* UncommonTrapBlob::create(
 462   CodeBuffer* cb,
 463   OopMapSet*  oop_maps,
 464   int        frame_size)
 465 {
 466   UncommonTrapBlob* blob = NULL;
 467   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 468   {
 469     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 470     unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob));
 471     blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
 472   }
 473 
 474   trace_new_stub(blob, "UncommonTrapBlob");
 475 
 476   return blob;
 477 }
 478 
 479 
 480 #endif // COMPILER2
 481 
 482 
 483 //----------------------------------------------------------------------------------------------------
 484 // Implementation of ExceptionBlob
 485 
 486 #ifdef COMPILER2
 487 ExceptionBlob::ExceptionBlob(
 488   CodeBuffer* cb,
 489   int         size,
 490   OopMapSet*  oop_maps,
 491   int         frame_size
 492 )
 493 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)
 494 {}
 495 
 496 
 497 ExceptionBlob* ExceptionBlob::create(
 498   CodeBuffer* cb,
 499   OopMapSet*  oop_maps,
 500   int         frame_size)
 501 {
 502   ExceptionBlob* blob = NULL;
 503   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 504   {
 505     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 506     unsigned int size = allocation_size(cb, sizeof(ExceptionBlob));
 507     blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
 508   }
 509 
 510   trace_new_stub(blob, "ExceptionBlob");
 511 
 512   return blob;
 513 }
 514 
 515 
 516 #endif // COMPILER2
 517 
 518 
 519 //----------------------------------------------------------------------------------------------------
 520 // Implementation of SafepointBlob
 521 
 522 SafepointBlob::SafepointBlob(
 523   CodeBuffer* cb,
 524   int         size,
 525   OopMapSet*  oop_maps,
 526   int         frame_size
 527 )
 528 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)
 529 {}
 530 
 531 
 532 SafepointBlob* SafepointBlob::create(
 533   CodeBuffer* cb,
 534   OopMapSet*  oop_maps,
 535   int         frame_size)
 536 {
 537   SafepointBlob* blob = NULL;
 538   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 539   {
 540     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 541     unsigned int size = allocation_size(cb, sizeof(SafepointBlob));
 542     blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
 543   }
 544 
 545   trace_new_stub(blob, "SafepointBlob");
 546 
 547   return blob;
 548 }
 549 
 550 
 551 //----------------------------------------------------------------------------------------------------
 552 // Verification and printing
 553 
 554 void CodeBlob::verify() {
 555   ShouldNotReachHere();
 556 }
 557 
 558 void CodeBlob::print_on(outputStream* st) const {
 559   st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
 560   st->print_cr("Framesize: %d", _frame_size);
 561 }
 562 
 563 void CodeBlob::print_value_on(outputStream* st) const {
 564   st->print_cr("[CodeBlob]");
 565 }
 566 
 567 void BufferBlob::verify() {
 568   // unimplemented
 569 }
 570 
 571 void BufferBlob::print_on(outputStream* st) const {
 572   CodeBlob::print_on(st);
 573   print_value_on(st);
 574 }
 575 
 576 void BufferBlob::print_value_on(outputStream* st) const {
 577   st->print_cr("BufferBlob (" INTPTR_FORMAT  ") used for %s", p2i(this), name());
 578 }
 579 
 580 void RuntimeStub::verify() {
 581   // unimplemented
 582 }
 583 
 584 void RuntimeStub::print_on(outputStream* st) const {
 585   ttyLocker ttyl;
 586   CodeBlob::print_on(st);
 587   st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
 588   st->print_cr("%s", name());
 589   Disassembler::decode((CodeBlob*)this, st);
 590 }
 591 
 592 void RuntimeStub::print_value_on(outputStream* st) const {
 593   st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
 594 }
 595 
 596 void SingletonBlob::verify() {
 597   // unimplemented
 598 }
 599 
 600 void SingletonBlob::print_on(outputStream* st) const {
 601   ttyLocker ttyl;
 602   CodeBlob::print_on(st);
 603   st->print_cr("%s", name());
 604   Disassembler::decode((CodeBlob*)this, st);
 605 }
 606 
 607 void SingletonBlob::print_value_on(outputStream* st) const {
 608   st->print_cr("%s", name());
 609 }
 610 
 611 void DeoptimizationBlob::print_value_on(outputStream* st) const {
 612   st->print_cr("Deoptimization (frame not available)");
 613 }