1 /*
   2  * Copyright (c) 1998, 2016, 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/codeCacheExtensions.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.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 #ifdef COMPILER1
  45 #include "c1/c1_Runtime1.hpp"
  46 #endif
  47 
  48 unsigned int CodeBlob::align_code_offset(int offset) {
  49   // align the size to CodeEntryAlignment
  50   return
  51     ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))
  52     - (int)CodeHeap::header_size();
  53 }
  54 
  55 
  56 // This must be consistent with the CodeBlob constructor's layout actions.
  57 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
  58   unsigned int size = header_size;
  59   size += round_to(cb->total_relocation_size(), oopSize);
  60   // align the size to CodeEntryAlignment
  61   size = align_code_offset(size);
  62   size += round_to(cb->total_content_size(), oopSize);
  63   size += round_to(cb->total_oop_size(), oopSize);
  64   size += round_to(cb->total_metadata_size(), oopSize);
  65   return size;
  66 }
  67 
  68 
  69 // Creates a simple CodeBlob. Sets up the size of the different regions.
  70 CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) {
  71   assert(size        == round_to(size,        oopSize), "unaligned size");
  72   assert(locs_size   == round_to(locs_size,   oopSize), "unaligned size");
  73   assert(header_size == round_to(header_size, oopSize), "unaligned size");
  74   assert(!UseRelocIndex, "no space allocated for reloc index yet");
  75 
  76   // Note: If UseRelocIndex is enabled, there needs to be (at least) one
  77   //       extra word for the relocation information, containing the reloc
  78   //       index table length. Unfortunately, the reloc index table imple-
  79   //       mentation is not easily understandable and thus it is not clear
  80   //       what exactly the format is supposed to be. For now, we just turn
  81   //       off the use of this table (gri 7/6/2000).
  82 
  83   _name                  = name;
  84   _size                  = size;
  85   _frame_complete_offset = frame_complete;
  86   _header_size           = header_size;
  87   _relocation_size       = locs_size;
  88   _content_offset        = align_code_offset(header_size + _relocation_size);
  89   _code_offset           = _content_offset;
  90   _data_offset           = size;
  91   _frame_size            =  0;
  92   set_oop_maps(NULL);
  93   _strings               = CodeStrings();
  94 }
  95 
  96 
  97 // Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions,
  98 // and copy code and relocation info.
  99 CodeBlob::CodeBlob(
 100   const char* name,
 101   CodeBuffer* cb,
 102   int         header_size,
 103   int         size,
 104   int         frame_complete,
 105   int         frame_size,
 106   OopMapSet*  oop_maps
 107 ) {
 108   assert(size        == round_to(size,        oopSize), "unaligned size");
 109   assert(header_size == round_to(header_size, oopSize), "unaligned size");
 110 
 111   _name                  = name;
 112   _size                  = size;
 113   _frame_complete_offset = frame_complete;
 114   _header_size           = header_size;
 115   _relocation_size       = round_to(cb->total_relocation_size(), oopSize);
 116   _content_offset        = align_code_offset(header_size + _relocation_size);
 117   _code_offset           = _content_offset + cb->total_offset_of(cb->insts());
 118   _data_offset           = _content_offset + round_to(cb->total_content_size(), oopSize);
 119   assert(_data_offset <= size, "codeBlob is too small");
 120   _strings               = CodeStrings();
 121 
 122   cb->copy_code_and_locs_to(this);
 123   set_oop_maps(oop_maps);
 124   _frame_size = frame_size;
 125 #ifdef COMPILER1
 126   // probably wrong for tiered
 127   assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
 128 #endif // COMPILER1
 129 }
 130 
 131 
 132 void CodeBlob::set_oop_maps(OopMapSet* p) {
 133   // Danger Will Robinson! This method allocates a big
 134   // chunk of memory, its your job to free it.
 135   if (p != NULL) {
 136     _oop_maps = ImmutableOopMapSet::build_from(p);
 137   } else {
 138     _oop_maps = NULL;
 139   }
 140 }
 141 
 142 
 143 void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) {
 144   // Do not hold the CodeCache lock during name formatting.
 145   assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
 146 
 147   if (stub != NULL) {
 148     char stub_id[256];
 149     assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
 150     jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
 151     if (PrintStubCode) {
 152       ttyLocker ttyl;
 153       tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);
 154       Disassembler::decode(stub->code_begin(), stub->code_end());
 155       tty->cr();
 156     }
 157     Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
 158 
 159     if (JvmtiExport::should_post_dynamic_code_generated()) {
 160       const char* stub_name = name2;
 161       if (name2[0] == '\0')  stub_name = name1;
 162       JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
 163     }
 164   }
 165 
 166   // Track memory usage statistic after releasing CodeCache_lock
 167   MemoryService::track_code_cache_memory_usage();
 168 }
 169 
 170 
 171 void CodeBlob::flush() {
 172   if (_oop_maps) {
 173     FREE_C_HEAP_ARRAY(unsigned char, _oop_maps);
 174     _oop_maps = NULL;
 175   }
 176   _strings.free();
 177 }
 178 
 179 
 180 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) {
 181   assert(oop_maps() != NULL, "nope");
 182   return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
 183 }
 184 
 185 void CodeBlob::print_code() {
 186   HandleMark hm;
 187   ResourceMark m;
 188   Disassembler::decode(this, tty);
 189 }
 190 
 191 //----------------------------------------------------------------------------------------------------
 192 // Implementation of BufferBlob
 193 
 194 
 195 BufferBlob::BufferBlob(const char* name, int size)
 196 : CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)
 197 {}
 198 
 199 BufferBlob* BufferBlob::create(const char* name, int buffer_size) {
 200   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 201 
 202   BufferBlob* blob = NULL;
 203   unsigned int size = sizeof(BufferBlob);
 204   CodeCacheExtensions::size_blob(name, &buffer_size);
 205   // align the size to CodeEntryAlignment
 206   size = align_code_offset(size);
 207   size += round_to(buffer_size, oopSize);
 208   assert(name != NULL, "must provide a name");
 209   {
 210     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 211     blob = new (size) BufferBlob(name, size);
 212   }
 213   // Track memory usage statistic after releasing CodeCache_lock
 214   MemoryService::track_code_cache_memory_usage();
 215 
 216   return blob;
 217 }
 218 
 219 
 220 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)
 221   : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)
 222 {}
 223 
 224 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
 225   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 226 
 227   BufferBlob* blob = NULL;
 228   unsigned int size = allocation_size(cb, sizeof(BufferBlob));
 229   assert(name != NULL, "must provide a name");
 230   {
 231     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 232     blob = new (size) BufferBlob(name, size, cb);
 233   }
 234   // Track memory usage statistic after releasing CodeCache_lock
 235   MemoryService::track_code_cache_memory_usage();
 236 
 237   return blob;
 238 }
 239 
 240 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
 241   return CodeCache::allocate(size, CodeBlobType::NonNMethod);
 242 }
 243 
 244 void BufferBlob::free(BufferBlob *blob) {
 245   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 246   blob->flush();
 247   {
 248     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 249     CodeCache::free((CodeBlob*)blob);
 250   }
 251   // Track memory usage statistic after releasing CodeCache_lock
 252   MemoryService::track_code_cache_memory_usage();
 253 }
 254 
 255 
 256 //----------------------------------------------------------------------------------------------------
 257 // Implementation of AdapterBlob
 258 
 259 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :
 260   BufferBlob("I2C/C2I adapters", size, cb) {
 261   CodeCache::commit(this);
 262 }
 263 
 264 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
 265   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 266 
 267   AdapterBlob* blob = NULL;
 268   unsigned int size = allocation_size(cb, sizeof(AdapterBlob));
 269   {
 270     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 271     blob = new (size) AdapterBlob(size, cb);
 272   }
 273   // Track memory usage statistic after releasing CodeCache_lock
 274   MemoryService::track_code_cache_memory_usage();
 275 
 276   return blob;
 277 }
 278 
 279 
 280 //----------------------------------------------------------------------------------------------------
 281 // Implementation of MethodHandlesAdapterBlob
 282 
 283 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
 284   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 285 
 286   MethodHandlesAdapterBlob* blob = NULL;
 287   unsigned int size = sizeof(MethodHandlesAdapterBlob);
 288   CodeCacheExtensions::size_blob("MethodHandles adapters", &buffer_size);
 289   // align the size to CodeEntryAlignment
 290   size = align_code_offset(size);
 291   size += round_to(buffer_size, oopSize);
 292   {
 293     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 294     blob = new (size) MethodHandlesAdapterBlob(size);
 295     if (blob == NULL) {
 296       vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
 297     }
 298   }
 299   // Track memory usage statistic after releasing CodeCache_lock
 300   MemoryService::track_code_cache_memory_usage();
 301 
 302   return blob;
 303 }
 304 
 305 //----------------------------------------------------------------------------------------------------
 306 // Implementation of RuntimeStub
 307 
 308 RuntimeStub::RuntimeStub(
 309   const char* name,
 310   CodeBuffer* cb,
 311   int         size,
 312   int         frame_complete,
 313   int         frame_size,
 314   OopMapSet*  oop_maps,
 315   bool        caller_must_gc_arguments
 316 )
 317 : CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps)
 318 {
 319   _caller_must_gc_arguments = caller_must_gc_arguments;
 320 }
 321 
 322 
 323 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
 324                                            CodeBuffer* cb,
 325                                            int frame_complete,
 326                                            int frame_size,
 327                                            OopMapSet* oop_maps,
 328                                            bool caller_must_gc_arguments)
 329 {
 330   RuntimeStub* stub = NULL;
 331   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 332   if (!CodeCacheExtensions::skip_code_generation()) {
 333     // bypass useless code generation
 334     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 335     unsigned int size = allocation_size(cb, sizeof(RuntimeStub));
 336     stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
 337   }
 338   stub = (RuntimeStub*) CodeCacheExtensions::handle_generated_blob(stub, stub_name);
 339 
 340   trace_new_stub(stub, "RuntimeStub - ", stub_name);
 341 
 342   return stub;
 343 }
 344 
 345 
 346 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
 347   void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
 348   if (!p) fatal("Initial size of CodeCache is too small");
 349   return p;
 350 }
 351 
 352 // operator new shared by all singletons:
 353 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
 354   void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
 355   if (!p) fatal("Initial size of CodeCache is too small");
 356   return p;
 357 }
 358 
 359 
 360 //----------------------------------------------------------------------------------------------------
 361 // Implementation of DeoptimizationBlob
 362 
 363 DeoptimizationBlob::DeoptimizationBlob(
 364   CodeBuffer* cb,
 365   int         size,
 366   OopMapSet*  oop_maps,
 367   int         unpack_offset,
 368   int         unpack_with_exception_offset,
 369   int         unpack_with_reexecution_offset,
 370   int         frame_size
 371 )
 372 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)
 373 {
 374   _unpack_offset           = unpack_offset;
 375   _unpack_with_exception   = unpack_with_exception_offset;
 376   _unpack_with_reexecution = unpack_with_reexecution_offset;
 377 #ifdef COMPILER1
 378   _unpack_with_exception_in_tls   = -1;
 379 #endif
 380 }
 381 
 382 
 383 DeoptimizationBlob* DeoptimizationBlob::create(
 384   CodeBuffer* cb,
 385   OopMapSet*  oop_maps,
 386   int        unpack_offset,
 387   int        unpack_with_exception_offset,
 388   int        unpack_with_reexecution_offset,
 389   int        frame_size)
 390 {
 391   DeoptimizationBlob* blob = NULL;
 392   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 393   {
 394     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 395     unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob));
 396     blob = new (size) DeoptimizationBlob(cb,
 397                                          size,
 398                                          oop_maps,
 399                                          unpack_offset,
 400                                          unpack_with_exception_offset,
 401                                          unpack_with_reexecution_offset,
 402                                          frame_size);
 403   }
 404 
 405   trace_new_stub(blob, "DeoptimizationBlob");
 406 
 407   return blob;
 408 }
 409 
 410 
 411 //----------------------------------------------------------------------------------------------------
 412 // Implementation of UncommonTrapBlob
 413 
 414 #ifdef COMPILER2
 415 UncommonTrapBlob::UncommonTrapBlob(
 416   CodeBuffer* cb,
 417   int         size,
 418   OopMapSet*  oop_maps,
 419   int         frame_size
 420 )
 421 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)
 422 {}
 423 
 424 
 425 UncommonTrapBlob* UncommonTrapBlob::create(
 426   CodeBuffer* cb,
 427   OopMapSet*  oop_maps,
 428   int        frame_size)
 429 {
 430   UncommonTrapBlob* blob = NULL;
 431   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
 432   {
 433     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 434     unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob));
 435     blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
 436   }
 437 
 438   trace_new_stub(blob, "UncommonTrapBlob");
 439 
 440   return blob;
 441 }
 442 
 443 
 444 #endif // COMPILER2
 445 
 446 
 447 //----------------------------------------------------------------------------------------------------
 448 // Implementation of ExceptionBlob
 449 
 450 #ifdef COMPILER2
 451 ExceptionBlob::ExceptionBlob(
 452   CodeBuffer* cb,
 453   int         size,
 454   OopMapSet*  oop_maps,
 455   int         frame_size
 456 )
 457 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)
 458 {}
 459 
 460 
 461 ExceptionBlob* ExceptionBlob::create(
 462   CodeBuffer* cb,
 463   OopMapSet*  oop_maps,
 464   int         frame_size)
 465 {
 466   ExceptionBlob* 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(ExceptionBlob));
 471     blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
 472   }
 473 
 474   trace_new_stub(blob, "ExceptionBlob");
 475 
 476   return blob;
 477 }
 478 
 479 
 480 #endif // COMPILER2
 481 
 482 
 483 //----------------------------------------------------------------------------------------------------
 484 // Implementation of SafepointBlob
 485 
 486 SafepointBlob::SafepointBlob(
 487   CodeBuffer* cb,
 488   int         size,
 489   OopMapSet*  oop_maps,
 490   int         frame_size
 491 )
 492 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)
 493 {}
 494 
 495 
 496 SafepointBlob* SafepointBlob::create(
 497   CodeBuffer* cb,
 498   OopMapSet*  oop_maps,
 499   int         frame_size)
 500 {
 501   SafepointBlob* 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 = allocation_size(cb, sizeof(SafepointBlob));
 506     blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
 507   }
 508 
 509   trace_new_stub(blob, "SafepointBlob");
 510 
 511   return blob;
 512 }
 513 
 514 
 515 //----------------------------------------------------------------------------------------------------
 516 // Verification and printing
 517 
 518 void CodeBlob::verify() {
 519   ShouldNotReachHere();
 520 }
 521 
 522 void CodeBlob::print_on(outputStream* st) const {
 523   st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
 524   st->print_cr("Framesize: %d", _frame_size);
 525 }
 526 
 527 void CodeBlob::print_value_on(outputStream* st) const {
 528   st->print_cr("[CodeBlob]");
 529 }
 530 
 531 void BufferBlob::verify() {
 532   // unimplemented
 533 }
 534 
 535 void BufferBlob::print_on(outputStream* st) const {
 536   CodeBlob::print_on(st);
 537   print_value_on(st);
 538 }
 539 
 540 void BufferBlob::print_value_on(outputStream* st) const {
 541   st->print_cr("BufferBlob (" INTPTR_FORMAT  ") used for %s", p2i(this), name());
 542 }
 543 
 544 void RuntimeStub::verify() {
 545   // unimplemented
 546 }
 547 
 548 void RuntimeStub::print_on(outputStream* st) const {
 549   ttyLocker ttyl;
 550   CodeBlob::print_on(st);
 551   st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
 552   st->print_cr("%s", name());
 553   Disassembler::decode((CodeBlob*)this, st);
 554 }
 555 
 556 void RuntimeStub::print_value_on(outputStream* st) const {
 557   st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
 558 }
 559 
 560 void SingletonBlob::verify() {
 561   // unimplemented
 562 }
 563 
 564 void SingletonBlob::print_on(outputStream* st) const {
 565   ttyLocker ttyl;
 566   CodeBlob::print_on(st);
 567   st->print_cr("%s", name());
 568   Disassembler::decode((CodeBlob*)this, st);
 569 }
 570 
 571 void SingletonBlob::print_value_on(outputStream* st) const {
 572   st->print_cr("%s", name());
 573 }
 574 
 575 void DeoptimizationBlob::print_value_on(outputStream* st) const {
 576   st->print_cr("Deoptimization (frame not available)");
 577 }
--- EOF ---