1 /* 2 * Copyright (c) 1998, 2025, 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 "code/aotCodeCache.hpp" 26 #include "code/codeBlob.hpp" 27 #include "code/codeCache.hpp" 28 #include "code/relocInfo.hpp" 29 #include "code/vtableStubs.hpp" 30 #include "compiler/disassembler.hpp" 31 #include "compiler/oopMap.hpp" 32 #include "cppstdlib/type_traits.hpp" 33 #include "interpreter/bytecode.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "jvm.h" 36 #include "memory/allocation.inline.hpp" 37 #include "memory/heap.hpp" 38 #include "memory/resourceArea.hpp" 39 #include "oops/oop.inline.hpp" 40 #include "prims/forte.hpp" 41 #include "prims/jvmtiExport.hpp" 42 #include "runtime/handles.inline.hpp" 43 #include "runtime/interfaceSupport.inline.hpp" 44 #include "runtime/javaFrameAnchor.hpp" 45 #include "runtime/jniHandles.inline.hpp" 46 #include "runtime/mutexLocker.hpp" 47 #include "runtime/safepoint.hpp" 48 #include "runtime/sharedRuntime.hpp" 49 #include "runtime/stubCodeGenerator.hpp" 50 #include "runtime/stubRoutines.hpp" 51 #include "runtime/vframe.hpp" 52 #include "services/memoryService.hpp" 53 #include "utilities/align.hpp" 54 #ifdef COMPILER1 55 #include "c1/c1_Runtime1.hpp" 56 #endif 57 58 // Virtual methods are not allowed in code blobs to simplify caching compiled code. 59 // Check all "leaf" subclasses of CodeBlob class. 60 61 static_assert(!std::is_polymorphic<nmethod>::value, "no virtual methods are allowed in nmethod"); 62 static_assert(!std::is_polymorphic<AdapterBlob>::value, "no virtual methods are allowed in code blobs"); 63 static_assert(!std::is_polymorphic<VtableBlob>::value, "no virtual methods are allowed in code blobs"); 64 static_assert(!std::is_polymorphic<MethodHandlesAdapterBlob>::value, "no virtual methods are allowed in code blobs"); 65 static_assert(!std::is_polymorphic<RuntimeStub>::value, "no virtual methods are allowed in code blobs"); 66 static_assert(!std::is_polymorphic<DeoptimizationBlob>::value, "no virtual methods are allowed in code blobs"); 67 static_assert(!std::is_polymorphic<SafepointBlob>::value, "no virtual methods are allowed in code blobs"); 68 static_assert(!std::is_polymorphic<UpcallStub>::value, "no virtual methods are allowed in code blobs"); 69 #ifdef COMPILER2 70 static_assert(!std::is_polymorphic<ExceptionBlob>::value, "no virtual methods are allowed in code blobs"); 71 static_assert(!std::is_polymorphic<UncommonTrapBlob>::value, "no virtual methods are allowed in code blobs"); 72 #endif 73 74 // Add proxy vtables. 75 // We need only few for now - they are used only from prints. 76 const nmethod::Vptr nmethod::_vpntr; 77 const BufferBlob::Vptr BufferBlob::_vpntr; 78 const RuntimeStub::Vptr RuntimeStub::_vpntr; 79 const SingletonBlob::Vptr SingletonBlob::_vpntr; 80 const DeoptimizationBlob::Vptr DeoptimizationBlob::_vpntr; 81 #ifdef COMPILER2 82 const ExceptionBlob::Vptr ExceptionBlob::_vpntr; 83 #endif // COMPILER2 84 const UpcallStub::Vptr UpcallStub::_vpntr; 85 86 const CodeBlob::Vptr* CodeBlob::vptr(CodeBlobKind kind) { 87 constexpr const CodeBlob::Vptr* array[(size_t)CodeBlobKind::Number_Of_Kinds] = { 88 nullptr/* None */, 89 &nmethod::_vpntr, 90 &BufferBlob::_vpntr, 91 &AdapterBlob::_vpntr, 92 &VtableBlob::_vpntr, 93 &MethodHandlesAdapterBlob::_vpntr, 94 &RuntimeStub::_vpntr, 95 &DeoptimizationBlob::_vpntr, 96 &SafepointBlob::_vpntr, 97 #ifdef COMPILER2 98 &ExceptionBlob::_vpntr, 99 &UncommonTrapBlob::_vpntr, 100 #endif 101 &UpcallStub::_vpntr 102 }; 103 104 return array[(size_t)kind]; 105 } 106 107 const CodeBlob::Vptr* CodeBlob::vptr() const { 108 return vptr(_kind); 109 } 110 111 unsigned int CodeBlob::align_code_offset(int offset) { 112 // align the size to CodeEntryAlignment 113 int header_size = (int)CodeHeap::header_size(); 114 return align_up(offset + header_size, CodeEntryAlignment) - header_size; 115 } 116 117 // This must be consistent with the CodeBlob constructor's layout actions. 118 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) { 119 // align the size to CodeEntryAlignment 120 unsigned int size = align_code_offset(header_size); 121 size += align_up(cb->total_content_size(), oopSize); 122 size += align_up(cb->total_oop_size(), oopSize); 123 return size; 124 } 125 126 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size, 127 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments, 128 int mutable_data_size) : 129 _oop_maps(nullptr), // will be set by set_oop_maps() call 130 _name(name), 131 _mutable_data(header_begin() + size), // default value is blob_end() 132 _size(size), 133 _relocation_size(align_up(cb->total_relocation_size(), oopSize)), 134 _content_offset(CodeBlob::align_code_offset(header_size)), 135 _code_offset(_content_offset + cb->total_offset_of(cb->insts())), 136 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)), 137 _frame_size(frame_size), 138 _mutable_data_size(mutable_data_size), 139 S390_ONLY(_ctable_offset(0) COMMA) 140 _header_size(header_size), 141 _frame_complete_offset(frame_complete_offset), 142 _kind(kind), 143 _caller_must_gc_arguments(caller_must_gc_arguments) 144 { 145 assert(is_aligned(_size, oopSize), "unaligned size"); 146 assert(is_aligned(header_size, oopSize), "unaligned size"); 147 assert(is_aligned(_relocation_size, oopSize), "unaligned size"); 148 assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size); 149 assert(is_nmethod() || (cb->total_oop_size() + cb->total_metadata_size() == 0), "must be nmethod"); 150 assert(code_end() == content_end(), "must be the same - see code_end()"); 151 #ifdef COMPILER1 152 // probably wrong for tiered 153 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs"); 154 #endif // COMPILER1 155 156 if (_mutable_data_size > 0) { 157 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode); 158 if (_mutable_data == nullptr) { 159 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data"); 160 } 161 } else { 162 // We need unique and valid not null address 163 assert(_mutable_data == blob_end(), "sanity"); 164 } 165 166 set_oop_maps(oop_maps); 167 } 168 169 // Simple CodeBlob used for simple BufferBlob. 170 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) : 171 _oop_maps(nullptr), 172 _name(name), 173 _mutable_data(header_begin() + size), // default value is blob_end() 174 _size(size), 175 _relocation_size(0), 176 _content_offset(CodeBlob::align_code_offset(header_size)), 177 _code_offset(_content_offset), 178 _data_offset(size), 179 _frame_size(0), 180 _mutable_data_size(0), 181 S390_ONLY(_ctable_offset(0) COMMA) 182 _header_size(header_size), 183 _frame_complete_offset(CodeOffsets::frame_never_safe), 184 _kind(kind), 185 _caller_must_gc_arguments(false) 186 { 187 assert(is_aligned(size, oopSize), "unaligned size"); 188 assert(is_aligned(header_size, oopSize), "unaligned size"); 189 assert(_mutable_data == blob_end(), "sanity"); 190 } 191 192 #ifdef ASSERT 193 CodeBlob::~CodeBlob() { 194 assert(_oop_maps == nullptr || AOTCodeCache::is_address_in_aot_cache((address)_oop_maps), "Not flushed"); 195 } 196 #endif 197 198 void CodeBlob::restore_mutable_data(address reloc_data) { 199 // Relocation data is now stored as part of the mutable data area; allocate it before copy relocations 200 if (_mutable_data_size > 0) { 201 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode); 202 if (_mutable_data == nullptr) { 203 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data"); 204 } 205 } else { 206 _mutable_data = blob_end(); // default value 207 } 208 if (_relocation_size > 0) { 209 assert(_mutable_data_size > 0, "relocation is part of mutable data section"); 210 memcpy((address)relocation_begin(), reloc_data, relocation_size()); 211 } 212 } 213 214 void CodeBlob::purge() { 215 assert(_mutable_data != nullptr, "should never be null"); 216 if (_mutable_data != blob_end()) { 217 os::free(_mutable_data); 218 _mutable_data = blob_end(); // Valid not null address 219 _mutable_data_size = 0; 220 _relocation_size = 0; 221 } 222 if (_oop_maps != nullptr && !AOTCodeCache::is_address_in_aot_cache((address)_oop_maps)) { 223 delete _oop_maps; 224 _oop_maps = nullptr; 225 } 226 NOT_PRODUCT(_asm_remarks.clear()); 227 NOT_PRODUCT(_dbg_strings.clear()); 228 } 229 230 void CodeBlob::set_oop_maps(OopMapSet* p) { 231 // Danger Will Robinson! This method allocates a big 232 // chunk of memory, its your job to free it. 233 if (p != nullptr) { 234 _oop_maps = ImmutableOopMapSet::build_from(p); 235 } else { 236 _oop_maps = nullptr; 237 } 238 } 239 240 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const { 241 assert(_oop_maps != nullptr, "nope"); 242 return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin()); 243 } 244 245 void CodeBlob::print_code_on(outputStream* st) { 246 ResourceMark m; 247 Disassembler::decode(this, st); 248 } 249 250 void CodeBlob::prepare_for_archiving_impl() { 251 set_name(nullptr); 252 _oop_maps = nullptr; 253 _mutable_data = nullptr; 254 #ifndef PRODUCT 255 asm_remarks().clear_ref(); 256 dbg_strings().clear_ref(); 257 #endif /* PRODUCT */ 258 } 259 260 void CodeBlob::prepare_for_archiving() { 261 vptr(_kind)->prepare_for_archiving(this); 262 } 263 264 void CodeBlob::archive_blob(CodeBlob* blob, address archive_buffer) { 265 blob->copy_to(archive_buffer); 266 CodeBlob* archived_blob = (CodeBlob*)archive_buffer; 267 archived_blob->prepare_for_archiving(); 268 } 269 270 void CodeBlob::post_restore_impl() { 271 // Track memory usage statistic after releasing CodeCache_lock 272 MemoryService::track_code_cache_memory_usage(); 273 } 274 275 void CodeBlob::post_restore() { 276 vptr(_kind)->post_restore(this); 277 } 278 279 CodeBlob* CodeBlob::restore(address code_cache_buffer, 280 const char* name, 281 address archived_reloc_data, 282 ImmutableOopMapSet* archived_oop_maps) 283 { 284 copy_to(code_cache_buffer); 285 CodeBlob* code_blob = (CodeBlob*)code_cache_buffer; 286 code_blob->set_name(name); 287 code_blob->restore_mutable_data(archived_reloc_data); 288 code_blob->set_oop_maps(archived_oop_maps); 289 return code_blob; 290 } 291 292 CodeBlob* CodeBlob::create(CodeBlob* archived_blob, 293 const char* name, 294 address archived_reloc_data, 295 ImmutableOopMapSet* archived_oop_maps 296 ) 297 { 298 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 299 300 CodeCache::gc_on_allocation(); 301 302 CodeBlob* blob = nullptr; 303 unsigned int size = archived_blob->size(); 304 { 305 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 306 address code_cache_buffer = (address)CodeCache::allocate(size, CodeBlobType::NonNMethod); 307 if (code_cache_buffer != nullptr) { 308 blob = archived_blob->restore(code_cache_buffer, 309 name, 310 archived_reloc_data, 311 archived_oop_maps); 312 assert(blob != nullptr, "sanity check"); 313 // Flush the code block 314 ICache::invalidate_range(blob->code_begin(), blob->code_size()); 315 CodeCache::commit(blob); // Count adapters 316 } 317 } 318 if (blob != nullptr) { 319 blob->post_restore(); 320 } 321 return blob; 322 } 323 324 //----------------------------------------------------------------------------------------- 325 // Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info. 326 327 RuntimeBlob::RuntimeBlob( 328 const char* name, 329 CodeBlobKind kind, 330 CodeBuffer* cb, 331 int size, 332 uint16_t header_size, 333 int16_t frame_complete, 334 int frame_size, 335 OopMapSet* oop_maps, 336 bool caller_must_gc_arguments) 337 : CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments, 338 align_up(cb->total_relocation_size(), oopSize)) 339 { 340 cb->copy_code_and_locs_to(this); 341 } 342 343 void RuntimeBlob::free(RuntimeBlob* blob) { 344 assert(blob != nullptr, "caller must check for nullptr"); 345 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 346 blob->purge(); 347 { 348 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 349 CodeCache::free(blob); 350 } 351 // Track memory usage statistic after releasing CodeCache_lock 352 MemoryService::track_code_cache_memory_usage(); 353 } 354 355 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) { 356 // Do not hold the CodeCache lock during name formatting. 357 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub"); 358 359 if (stub != nullptr && (PrintStubCode || 360 Forte::is_enabled() || 361 JvmtiExport::should_post_dynamic_code_generated())) { 362 char stub_id[256]; 363 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), ""); 364 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2); 365 if (PrintStubCode) { 366 ttyLocker ttyl; 367 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"); 368 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)", 369 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size()); 370 Disassembler::decode(stub->code_begin(), stub->code_end(), tty 371 NOT_PRODUCT(COMMA &stub->asm_remarks())); 372 if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) { 373 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"); 374 stub->oop_maps()->print(); 375 } 376 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"); 377 tty->cr(); 378 } 379 if (Forte::is_enabled()) { 380 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end()); 381 } 382 383 if (JvmtiExport::should_post_dynamic_code_generated()) { 384 const char* stub_name = name2; 385 if (name2[0] == '\0') stub_name = name1; 386 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end()); 387 } 388 } 389 390 // Track memory usage statistic after releasing CodeCache_lock 391 MemoryService::track_code_cache_memory_usage(); 392 } 393 394 //---------------------------------------------------------------------------------------------------- 395 // Implementation of BufferBlob 396 397 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) 398 : RuntimeBlob(name, kind, size, header_size) 399 {} 400 401 BufferBlob* BufferBlob::create(const char* name, uint buffer_size) { 402 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 403 404 BufferBlob* blob = nullptr; 405 unsigned int size = sizeof(BufferBlob); 406 // align the size to CodeEntryAlignment 407 size = CodeBlob::align_code_offset(size); 408 size += align_up(buffer_size, oopSize); 409 assert(name != nullptr, "must provide a name"); 410 { 411 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 412 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size); 413 } 414 // Track memory usage statistic after releasing CodeCache_lock 415 MemoryService::track_code_cache_memory_usage(); 416 417 return blob; 418 } 419 420 421 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size) 422 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, 0, nullptr) 423 {} 424 425 // Used by gtest 426 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) { 427 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 428 429 BufferBlob* blob = nullptr; 430 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob)); 431 assert(name != nullptr, "must provide a name"); 432 { 433 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 434 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size); 435 } 436 // Track memory usage statistic after releasing CodeCache_lock 437 MemoryService::track_code_cache_memory_usage(); 438 439 return blob; 440 } 441 442 void* BufferBlob::operator new(size_t s, unsigned size) throw() { 443 return CodeCache::allocate(size, CodeBlobType::NonNMethod); 444 } 445 446 void BufferBlob::free(BufferBlob *blob) { 447 RuntimeBlob::free(blob); 448 } 449 450 451 //---------------------------------------------------------------------------------------------------- 452 // Implementation of AdapterBlob 453 454 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) : 455 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size, sizeof(AdapterBlob)) { 456 assert(entry_offset[I2C] == 0, "sanity check"); 457 #ifdef ASSERT 458 for (int i = 1; i < AdapterBlob::ENTRY_COUNT; i++) { 459 // The entry is within the adapter blob or unset. 460 int offset = entry_offset[i]; 461 assert((offset > 0 && offset < cb->insts()->size()) || 462 (i >= C2I_No_Clinit_Check && offset == -1), 463 "invalid entry offset[%d] = 0x%x", i, offset); 464 } 465 #endif // ASSERT 466 _c2i_offset = entry_offset[C2I]; 467 _c2i_unverified_offset = entry_offset[C2I_Unverified]; 468 _c2i_no_clinit_check_offset = entry_offset[C2I_No_Clinit_Check]; 469 CodeCache::commit(this); 470 } 471 472 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) { 473 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 474 475 CodeCache::gc_on_allocation(); 476 477 AdapterBlob* blob = nullptr; 478 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob)); 479 { 480 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 481 blob = new (size) AdapterBlob(size, cb, entry_offset); 482 } 483 // Track memory usage statistic after releasing CodeCache_lock 484 MemoryService::track_code_cache_memory_usage(); 485 486 return blob; 487 } 488 489 //---------------------------------------------------------------------------------------------------- 490 // Implementation of VtableBlob 491 492 void* VtableBlob::operator new(size_t s, unsigned size) throw() { 493 // Handling of allocation failure stops compilation and prints a bunch of 494 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock 495 // can be locked, and then re-locking the CodeCache_lock. That is not safe in 496 // this context as we hold the CompiledICLocker. So we just don't handle code 497 // cache exhaustion here; we leave that for a later allocation that does not 498 // hold the CompiledICLocker. 499 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */); 500 } 501 502 VtableBlob::VtableBlob(const char* name, int size) : 503 BufferBlob(name, CodeBlobKind::Vtable, size) { 504 } 505 506 VtableBlob* VtableBlob::create(const char* name, int buffer_size) { 507 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state"); 508 509 VtableBlob* blob = nullptr; 510 unsigned int size = sizeof(VtableBlob); 511 // align the size to CodeEntryAlignment 512 size = align_code_offset(size); 513 size += align_up(buffer_size, oopSize); 514 assert(name != nullptr, "must provide a name"); 515 { 516 if (!CodeCache_lock->try_lock()) { 517 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing 518 // IC transition to megamorphic, for which this stub will be needed. It is better to 519 // bail out the transition, and wait for a more opportune moment. Not only is it not 520 // worth waiting for the lock blockingly for the megamorphic transition, it might 521 // also result in a deadlock to blockingly wait, when concurrent class unloading is 522 // performed. At this point in time, the CompiledICLocker is taken, so we are not 523 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise 524 // consistently taken in the opposite order. Bailing out results in an IC transition to 525 // the clean state instead, which will cause subsequent calls to retry the transitioning 526 // eventually. 527 return nullptr; 528 } 529 blob = new (size) VtableBlob(name, size); 530 CodeCache_lock->unlock(); 531 } 532 // Track memory usage statistic after releasing CodeCache_lock 533 MemoryService::track_code_cache_memory_usage(); 534 535 return blob; 536 } 537 538 //---------------------------------------------------------------------------------------------------- 539 // Implementation of MethodHandlesAdapterBlob 540 541 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) { 542 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 543 544 MethodHandlesAdapterBlob* blob = nullptr; 545 unsigned int size = sizeof(MethodHandlesAdapterBlob); 546 // align the size to CodeEntryAlignment 547 size = CodeBlob::align_code_offset(size); 548 size += align_up(buffer_size, oopSize); 549 { 550 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 551 blob = new (size) MethodHandlesAdapterBlob(size); 552 if (blob == nullptr) { 553 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob"); 554 } 555 } 556 // Track memory usage statistic after releasing CodeCache_lock 557 MemoryService::track_code_cache_memory_usage(); 558 559 return blob; 560 } 561 562 //---------------------------------------------------------------------------------------------------- 563 // Implementation of RuntimeStub 564 565 RuntimeStub::RuntimeStub( 566 const char* name, 567 CodeBuffer* cb, 568 int size, 569 int16_t frame_complete, 570 int frame_size, 571 OopMapSet* oop_maps, 572 bool caller_must_gc_arguments 573 ) 574 : RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub), 575 frame_complete, frame_size, oop_maps, caller_must_gc_arguments) 576 { 577 } 578 579 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name, 580 CodeBuffer* cb, 581 int16_t frame_complete, 582 int frame_size, 583 OopMapSet* oop_maps, 584 bool caller_must_gc_arguments, 585 bool alloc_fail_is_fatal) 586 { 587 RuntimeStub* stub = nullptr; 588 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub)); 589 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 590 { 591 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 592 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments); 593 if (stub == nullptr) { 594 if (!alloc_fail_is_fatal) { 595 return nullptr; 596 } 597 fatal("Initial size of CodeCache is too small"); 598 } 599 } 600 601 trace_new_stub(stub, "RuntimeStub - ", stub_name); 602 603 return stub; 604 } 605 606 607 void* RuntimeStub::operator new(size_t s, unsigned size) throw() { 608 return CodeCache::allocate(size, CodeBlobType::NonNMethod); 609 } 610 611 // operator new shared by all singletons: 612 void* SingletonBlob::operator new(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() { 613 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod); 614 if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small"); 615 return p; 616 } 617 618 619 //---------------------------------------------------------------------------------------------------- 620 // Implementation of DeoptimizationBlob 621 622 DeoptimizationBlob::DeoptimizationBlob( 623 CodeBuffer* cb, 624 int size, 625 OopMapSet* oop_maps, 626 int unpack_offset, 627 int unpack_with_exception_offset, 628 int unpack_with_reexecution_offset, 629 int frame_size 630 ) 631 : SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb, 632 size, sizeof(DeoptimizationBlob), frame_size, oop_maps) 633 { 634 _unpack_offset = unpack_offset; 635 _unpack_with_exception = unpack_with_exception_offset; 636 _unpack_with_reexecution = unpack_with_reexecution_offset; 637 #ifdef COMPILER1 638 _unpack_with_exception_in_tls = -1; 639 #endif 640 } 641 642 643 DeoptimizationBlob* DeoptimizationBlob::create( 644 CodeBuffer* cb, 645 OopMapSet* oop_maps, 646 int unpack_offset, 647 int unpack_with_exception_offset, 648 int unpack_with_reexecution_offset, 649 int frame_size) 650 { 651 DeoptimizationBlob* blob = nullptr; 652 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob)); 653 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 654 { 655 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 656 blob = new (size) DeoptimizationBlob(cb, 657 size, 658 oop_maps, 659 unpack_offset, 660 unpack_with_exception_offset, 661 unpack_with_reexecution_offset, 662 frame_size); 663 } 664 665 trace_new_stub(blob, "DeoptimizationBlob"); 666 667 return blob; 668 } 669 670 #ifdef COMPILER2 671 672 //---------------------------------------------------------------------------------------------------- 673 // Implementation of UncommonTrapBlob 674 675 UncommonTrapBlob::UncommonTrapBlob( 676 CodeBuffer* cb, 677 int size, 678 OopMapSet* oop_maps, 679 int frame_size 680 ) 681 : SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb, 682 size, sizeof(UncommonTrapBlob), frame_size, oop_maps) 683 {} 684 685 686 UncommonTrapBlob* UncommonTrapBlob::create( 687 CodeBuffer* cb, 688 OopMapSet* oop_maps, 689 int frame_size) 690 { 691 UncommonTrapBlob* blob = nullptr; 692 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob)); 693 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 694 { 695 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 696 blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size); 697 } 698 699 trace_new_stub(blob, "UncommonTrapBlob"); 700 701 return blob; 702 } 703 704 //---------------------------------------------------------------------------------------------------- 705 // Implementation of ExceptionBlob 706 707 ExceptionBlob::ExceptionBlob( 708 CodeBuffer* cb, 709 int size, 710 OopMapSet* oop_maps, 711 int frame_size 712 ) 713 : SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb, 714 size, sizeof(ExceptionBlob), frame_size, oop_maps) 715 {} 716 717 718 ExceptionBlob* ExceptionBlob::create( 719 CodeBuffer* cb, 720 OopMapSet* oop_maps, 721 int frame_size) 722 { 723 ExceptionBlob* blob = nullptr; 724 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob)); 725 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 726 { 727 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 728 blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size); 729 } 730 731 trace_new_stub(blob, "ExceptionBlob"); 732 733 return blob; 734 } 735 736 #endif // COMPILER2 737 738 //---------------------------------------------------------------------------------------------------- 739 // Implementation of SafepointBlob 740 741 SafepointBlob::SafepointBlob( 742 CodeBuffer* cb, 743 int size, 744 OopMapSet* oop_maps, 745 int frame_size 746 ) 747 : SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb, 748 size, sizeof(SafepointBlob), frame_size, oop_maps) 749 {} 750 751 752 SafepointBlob* SafepointBlob::create( 753 CodeBuffer* cb, 754 OopMapSet* oop_maps, 755 int frame_size) 756 { 757 SafepointBlob* blob = nullptr; 758 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob)); 759 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 760 { 761 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 762 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size); 763 } 764 765 trace_new_stub(blob, "SafepointBlob"); 766 767 return blob; 768 } 769 770 //---------------------------------------------------------------------------------------------------- 771 // Implementation of UpcallStub 772 773 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) : 774 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub), 775 CodeOffsets::frame_never_safe, 0 /* no frame size */, 776 /* oop maps = */ nullptr, /* caller must gc arguments = */ false), 777 _receiver(receiver), 778 _frame_data_offset(frame_data_offset) 779 { 780 CodeCache::commit(this); 781 } 782 783 void* UpcallStub::operator new(size_t s, unsigned size) throw() { 784 return CodeCache::allocate(size, CodeBlobType::NonNMethod); 785 } 786 787 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) { 788 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 789 790 UpcallStub* blob = nullptr; 791 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub)); 792 { 793 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 794 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset); 795 } 796 if (blob == nullptr) { 797 return nullptr; // caller must handle this 798 } 799 800 // Track memory usage statistic after releasing CodeCache_lock 801 MemoryService::track_code_cache_memory_usage(); 802 803 trace_new_stub(blob, "UpcallStub - ", name); 804 805 return blob; 806 } 807 808 void UpcallStub::oops_do(OopClosure* f, const frame& frame) { 809 frame_data_for_frame(frame)->old_handles->oops_do(f); 810 } 811 812 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const { 813 return &frame_data_for_frame(frame)->jfa; 814 } 815 816 void UpcallStub::free(UpcallStub* blob) { 817 assert(blob != nullptr, "caller must check for nullptr"); 818 JNIHandles::destroy_global(blob->receiver()); 819 RuntimeBlob::free(blob); 820 } 821 822 //---------------------------------------------------------------------------------------------------- 823 // Verification and printing 824 825 void CodeBlob::verify() { 826 if (is_nmethod()) { 827 as_nmethod()->verify(); 828 } 829 } 830 831 void CodeBlob::print_on(outputStream* st) const { 832 vptr()->print_on(this, st); 833 } 834 835 void CodeBlob::print() const { print_on(tty); } 836 837 void CodeBlob::print_value_on(outputStream* st) const { 838 vptr()->print_value_on(this, st); 839 } 840 841 void CodeBlob::print_on_impl(outputStream* st) const { 842 st->print_cr("[CodeBlob kind:%d (" INTPTR_FORMAT ")]", (int)_kind, p2i(this)); 843 st->print_cr("Framesize: %d", _frame_size); 844 } 845 846 void CodeBlob::print_value_on_impl(outputStream* st) const { 847 st->print_cr("[CodeBlob]"); 848 } 849 850 void CodeBlob::print_block_comment(outputStream* stream, address block_begin) const { 851 #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY) 852 if (is_nmethod()) { 853 as_nmethod()->print_nmethod_labels(stream, block_begin); 854 } 855 #endif 856 857 #ifndef PRODUCT 858 ptrdiff_t offset = block_begin - code_begin(); 859 assert(offset >= 0, "Expecting non-negative offset!"); 860 _asm_remarks.print(uint(offset), stream); 861 #endif 862 } 863 864 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const { 865 if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) { 866 // the interpreter is generated into a buffer blob 867 InterpreterCodelet* i = Interpreter::codelet_containing(addr); 868 if (i != nullptr) { 869 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin())); 870 i->print_on(st); 871 return; 872 } 873 if (Interpreter::contains(addr)) { 874 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code" 875 " (not bytecode specific)", p2i(addr)); 876 return; 877 } 878 // 879 if (AdapterHandlerLibrary::contains(this)) { 880 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin())); 881 AdapterHandlerLibrary::print_handler_on(st, this); 882 } 883 // the stubroutines are generated into a buffer blob 884 StubCodeDesc* d = StubCodeDesc::desc_for(addr); 885 if (d != nullptr) { 886 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin())); 887 d->print_on(st); 888 st->cr(); 889 return; 890 } 891 if (StubRoutines::contains(addr)) { 892 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr)); 893 return; 894 } 895 VtableStub* v = VtableStubs::stub_containing(addr); 896 if (v != nullptr) { 897 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point())); 898 v->print_on(st); 899 st->cr(); 900 return; 901 } 902 } 903 if (is_nmethod()) { 904 nmethod* nm = (nmethod*)this; 905 ResourceMark rm; 906 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT, 907 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm)); 908 if (verbose) { 909 st->print(" for "); 910 nm->method()->print_value_on(st); 911 } 912 st->cr(); 913 if (verbose && st == tty) { 914 // verbose is only ever true when called from findpc in debug.cpp 915 nm->print_nmethod(true); 916 } else { 917 nm->print_on(st); 918 nm->print_code_snippet(st, addr); 919 } 920 return; 921 } 922 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin())); 923 print_on(st); 924 } 925 926 void BufferBlob::print_on_impl(outputStream* st) const { 927 RuntimeBlob::print_on_impl(st); 928 print_value_on_impl(st); 929 } 930 931 void BufferBlob::print_value_on_impl(outputStream* st) const { 932 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name()); 933 } 934 935 void RuntimeStub::print_on_impl(outputStream* st) const { 936 ttyLocker ttyl; 937 RuntimeBlob::print_on_impl(st); 938 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this)); 939 st->print_cr("%s", name()); 940 Disassembler::decode((RuntimeBlob*)this, st); 941 } 942 943 void RuntimeStub::print_value_on_impl(outputStream* st) const { 944 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name()); 945 } 946 947 void SingletonBlob::print_on_impl(outputStream* st) const { 948 ttyLocker ttyl; 949 RuntimeBlob::print_on_impl(st); 950 st->print_cr("%s", name()); 951 Disassembler::decode((RuntimeBlob*)this, st); 952 } 953 954 void SingletonBlob::print_value_on_impl(outputStream* st) const { 955 st->print_cr("%s", name()); 956 } 957 958 void DeoptimizationBlob::print_value_on_impl(outputStream* st) const { 959 st->print_cr("Deoptimization (frame not available)"); 960 } 961 962 void UpcallStub::print_on_impl(outputStream* st) const { 963 RuntimeBlob::print_on_impl(st); 964 print_value_on_impl(st); 965 st->print_cr("Frame data offset: %d", (int) _frame_data_offset); 966 oop recv = JNIHandles::resolve(_receiver); 967 st->print("Receiver MH="); 968 recv->print_on(st); 969 Disassembler::decode((RuntimeBlob*)this, st); 970 } 971 972 void UpcallStub::print_value_on_impl(outputStream* st) const { 973 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name()); 974 } --- EOF ---