1 /* 2 * Copyright (c) 1998, 2014, 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 COMPILER1 43 #include "c1/c1_Runtime1.hpp" 44 #endif 45 46 unsigned int CodeBlob::align_code_offset(int offset) { 47 // align the size to CodeEntryAlignment 48 return 49 ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1)) 50 - (int)CodeHeap::header_size(); 51 } 52 53 54 // This must be consistent with the CodeBlob constructor's layout actions. 55 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) { 56 unsigned int size = header_size; 57 size += round_to(cb->total_relocation_size(), oopSize); 58 // align the size to CodeEntryAlignment 59 size = align_code_offset(size); 60 size += round_to(cb->total_content_size(), oopSize); 61 size += round_to(cb->total_oop_size(), oopSize); 62 size += round_to(cb->total_metadata_size(), oopSize); 63 return size; 64 } 65 66 67 // Creates a simple CodeBlob. Sets up the size of the different regions. 68 CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) { 69 assert(size == round_to(size, oopSize), "unaligned size"); 70 assert(locs_size == round_to(locs_size, oopSize), "unaligned size"); 71 assert(header_size == round_to(header_size, oopSize), "unaligned size"); 72 assert(!UseRelocIndex, "no space allocated for reloc index yet"); 73 74 // Note: If UseRelocIndex is enabled, there needs to be (at least) one 75 // extra word for the relocation information, containing the reloc 76 // index table length. Unfortunately, the reloc index table imple- 77 // mentation is not easily understandable and thus it is not clear 78 // what exactly the format is supposed to be. For now, we just turn 79 // off the use of this table (gri 7/6/2000). 80 81 _name = name; 82 _size = size; 83 _frame_complete_offset = frame_complete; 84 _header_size = header_size; 85 _relocation_size = locs_size; 86 _content_offset = align_code_offset(header_size + _relocation_size); 87 _code_offset = _content_offset; 88 _data_offset = size; 89 _frame_size = 0; 90 set_oop_maps(NULL); 91 } 92 93 94 // Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions, 95 // and copy code and relocation info. 96 CodeBlob::CodeBlob( 97 const char* name, 98 CodeBuffer* cb, 99 int header_size, 100 int size, 101 int frame_complete, 102 int frame_size, 103 OopMapSet* oop_maps 104 ) { 105 assert(size == round_to(size, oopSize), "unaligned size"); 106 assert(header_size == round_to(header_size, oopSize), "unaligned size"); 107 108 _name = name; 109 _size = size; 110 _frame_complete_offset = frame_complete; 111 _header_size = header_size; 112 _relocation_size = round_to(cb->total_relocation_size(), oopSize); 113 _content_offset = align_code_offset(header_size + _relocation_size); 114 _code_offset = _content_offset + cb->total_offset_of(cb->insts()); 115 _data_offset = _content_offset + round_to(cb->total_content_size(), oopSize); 116 assert(_data_offset <= size, "codeBlob is too small"); 117 118 cb->copy_code_and_locs_to(this); 119 set_oop_maps(oop_maps); 120 _frame_size = frame_size; 121 #ifdef COMPILER1 122 // probably wrong for tiered 123 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs"); 124 #endif // COMPILER1 125 } 126 127 128 void CodeBlob::set_oop_maps(OopMapSet* p) { 129 // Danger Will Robinson! This method allocates a big 130 // chunk of memory, its your job to free it. 131 if (p != NULL) { 132 _oop_maps = ImmutableOopMapSet::build_from(p); 133 } else { 134 _oop_maps = NULL; 135 } 136 } 137 138 139 void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) { 140 // Do not hold the CodeCache lock during name formatting. 141 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub"); 142 143 if (stub != NULL) { 144 char stub_id[256]; 145 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), ""); 146 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2); 147 if (PrintStubCode) { 148 ttyLocker ttyl; 149 tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub); 150 Disassembler::decode(stub->code_begin(), stub->code_end()); 151 tty->cr(); 152 } 153 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end()); 154 155 if (JvmtiExport::should_post_dynamic_code_generated()) { 156 const char* stub_name = name2; 157 if (name2[0] == '\0') stub_name = name1; 158 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end()); 159 } 160 } 161 162 // Track memory usage statistic after releasing CodeCache_lock 163 MemoryService::track_code_cache_memory_usage(); 164 } 165 166 167 void CodeBlob::flush() { 168 if (_oop_maps) { 169 FREE_C_HEAP_ARRAY(unsigned char, _oop_maps); 170 _oop_maps = NULL; 171 } 172 _strings.free(); 173 } 174 175 176 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) { 177 assert(oop_maps() != NULL, "nope"); 178 return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin()); 179 } 180 181 182 //---------------------------------------------------------------------------------------------------- 183 // Implementation of BufferBlob 184 185 186 BufferBlob::BufferBlob(const char* name, int size) 187 : CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0) 188 {} 189 190 BufferBlob* BufferBlob::create(const char* name, int buffer_size) { 191 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 192 193 BufferBlob* blob = NULL; 194 unsigned int size = sizeof(BufferBlob); 195 // align the size to CodeEntryAlignment 196 size = align_code_offset(size); 197 size += round_to(buffer_size, oopSize); 198 assert(name != NULL, "must provide a name"); 199 { 200 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 201 blob = new (size) BufferBlob(name, size); 202 } 203 // Track memory usage statistic after releasing CodeCache_lock 204 MemoryService::track_code_cache_memory_usage(); 205 206 return blob; 207 } 208 209 210 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb) 211 : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL) 212 {} 213 214 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) { 215 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 216 217 BufferBlob* blob = NULL; 218 unsigned int size = allocation_size(cb, sizeof(BufferBlob)); 219 assert(name != NULL, "must provide a name"); 220 { 221 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 222 blob = new (size) BufferBlob(name, size, cb); 223 } 224 // Track memory usage statistic after releasing CodeCache_lock 225 MemoryService::track_code_cache_memory_usage(); 226 227 return blob; 228 } 229 230 void* BufferBlob::operator new(size_t s, unsigned size) throw() { 231 return CodeCache::allocate(size, CodeBlobType::NonNMethod); 232 } 233 234 void BufferBlob::free(BufferBlob *blob) { 235 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 236 blob->flush(); 237 { 238 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 239 CodeCache::free((CodeBlob*)blob); 240 } 241 // Track memory usage statistic after releasing CodeCache_lock 242 MemoryService::track_code_cache_memory_usage(); 243 } 244 245 246 //---------------------------------------------------------------------------------------------------- 247 // Implementation of AdapterBlob 248 249 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) : 250 BufferBlob("I2C/C2I adapters", size, cb) { 251 CodeCache::commit(this); 252 } 253 254 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) { 255 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 256 257 AdapterBlob* blob = NULL; 258 unsigned int size = allocation_size(cb, sizeof(AdapterBlob)); 259 { 260 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 261 blob = new (size) AdapterBlob(size, cb); 262 } 263 // Track memory usage statistic after releasing CodeCache_lock 264 MemoryService::track_code_cache_memory_usage(); 265 266 return blob; 267 } 268 269 270 //---------------------------------------------------------------------------------------------------- 271 // Implementation of MethodHandlesAdapterBlob 272 273 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) { 274 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 275 276 MethodHandlesAdapterBlob* blob = NULL; 277 unsigned int size = sizeof(MethodHandlesAdapterBlob); 278 // align the size to CodeEntryAlignment 279 size = align_code_offset(size); 280 size += round_to(buffer_size, oopSize); 281 { 282 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 283 blob = new (size) MethodHandlesAdapterBlob(size); 284 } 285 // Track memory usage statistic after releasing CodeCache_lock 286 MemoryService::track_code_cache_memory_usage(); 287 288 return blob; 289 } 290 291 //---------------------------------------------------------------------------------------------------- 292 // Implementation of RuntimeStub 293 294 RuntimeStub::RuntimeStub( 295 const char* name, 296 CodeBuffer* cb, 297 int size, 298 int frame_complete, 299 int frame_size, 300 OopMapSet* oop_maps, 301 bool caller_must_gc_arguments 302 ) 303 : CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps) 304 { 305 _caller_must_gc_arguments = caller_must_gc_arguments; 306 } 307 308 309 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name, 310 CodeBuffer* cb, 311 int frame_complete, 312 int frame_size, 313 OopMapSet* oop_maps, 314 bool caller_must_gc_arguments) 315 { 316 RuntimeStub* stub = NULL; 317 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 318 { 319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 320 unsigned int size = allocation_size(cb, sizeof(RuntimeStub)); 321 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments); 322 } 323 324 trace_new_stub(stub, "RuntimeStub - ", stub_name); 325 326 return stub; 327 } 328 329 330 void* RuntimeStub::operator new(size_t s, unsigned size) throw() { 331 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod); 332 if (!p) fatal("Initial size of CodeCache is too small"); 333 return p; 334 } 335 336 // operator new shared by all singletons: 337 void* SingletonBlob::operator new(size_t s, unsigned size) throw() { 338 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod); 339 if (!p) fatal("Initial size of CodeCache is too small"); 340 return p; 341 } 342 343 344 //---------------------------------------------------------------------------------------------------- 345 // Implementation of DeoptimizationBlob 346 347 DeoptimizationBlob::DeoptimizationBlob( 348 CodeBuffer* cb, 349 int size, 350 OopMapSet* oop_maps, 351 int unpack_offset, 352 int unpack_with_exception_offset, 353 int unpack_with_reexecution_offset, 354 int frame_size 355 ) 356 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps) 357 { 358 _unpack_offset = unpack_offset; 359 _unpack_with_exception = unpack_with_exception_offset; 360 _unpack_with_reexecution = unpack_with_reexecution_offset; 361 #ifdef COMPILER1 362 _unpack_with_exception_in_tls = -1; 363 #endif 364 } 365 366 367 DeoptimizationBlob* DeoptimizationBlob::create( 368 CodeBuffer* cb, 369 OopMapSet* oop_maps, 370 int unpack_offset, 371 int unpack_with_exception_offset, 372 int unpack_with_reexecution_offset, 373 int frame_size) 374 { 375 DeoptimizationBlob* blob = NULL; 376 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 377 { 378 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 379 unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob)); 380 blob = new (size) DeoptimizationBlob(cb, 381 size, 382 oop_maps, 383 unpack_offset, 384 unpack_with_exception_offset, 385 unpack_with_reexecution_offset, 386 frame_size); 387 } 388 389 trace_new_stub(blob, "DeoptimizationBlob"); 390 391 return blob; 392 } 393 394 395 //---------------------------------------------------------------------------------------------------- 396 // Implementation of UncommonTrapBlob 397 398 #ifdef COMPILER2 399 UncommonTrapBlob::UncommonTrapBlob( 400 CodeBuffer* cb, 401 int size, 402 OopMapSet* oop_maps, 403 int frame_size 404 ) 405 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps) 406 {} 407 408 409 UncommonTrapBlob* UncommonTrapBlob::create( 410 CodeBuffer* cb, 411 OopMapSet* oop_maps, 412 int frame_size) 413 { 414 UncommonTrapBlob* blob = NULL; 415 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 416 { 417 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 418 unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob)); 419 blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size); 420 } 421 422 trace_new_stub(blob, "UncommonTrapBlob"); 423 424 return blob; 425 } 426 427 428 #endif // COMPILER2 429 430 431 //---------------------------------------------------------------------------------------------------- 432 // Implementation of ExceptionBlob 433 434 #ifdef COMPILER2 435 ExceptionBlob::ExceptionBlob( 436 CodeBuffer* cb, 437 int size, 438 OopMapSet* oop_maps, 439 int frame_size 440 ) 441 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps) 442 {} 443 444 445 ExceptionBlob* ExceptionBlob::create( 446 CodeBuffer* cb, 447 OopMapSet* oop_maps, 448 int frame_size) 449 { 450 ExceptionBlob* blob = NULL; 451 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 452 { 453 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 454 unsigned int size = allocation_size(cb, sizeof(ExceptionBlob)); 455 blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size); 456 } 457 458 trace_new_stub(blob, "ExceptionBlob"); 459 460 return blob; 461 } 462 463 464 #endif // COMPILER2 465 466 467 //---------------------------------------------------------------------------------------------------- 468 // Implementation of SafepointBlob 469 470 SafepointBlob::SafepointBlob( 471 CodeBuffer* cb, 472 int size, 473 OopMapSet* oop_maps, 474 int frame_size 475 ) 476 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps) 477 {} 478 479 480 SafepointBlob* SafepointBlob::create( 481 CodeBuffer* cb, 482 OopMapSet* oop_maps, 483 int frame_size) 484 { 485 SafepointBlob* blob = NULL; 486 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock 487 { 488 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 489 unsigned int size = allocation_size(cb, sizeof(SafepointBlob)); 490 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size); 491 } 492 493 trace_new_stub(blob, "SafepointBlob"); 494 495 return blob; 496 } 497 498 499 //---------------------------------------------------------------------------------------------------- 500 // Verification and printing 501 502 void CodeBlob::verify() { 503 ShouldNotReachHere(); 504 } 505 506 void CodeBlob::print_on(outputStream* st) const { 507 st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this)); 508 st->print_cr("Framesize: %d", _frame_size); 509 } 510 511 void CodeBlob::print_value_on(outputStream* st) const { 512 st->print_cr("[CodeBlob]"); 513 } 514 515 void BufferBlob::verify() { 516 // unimplemented 517 } 518 519 void BufferBlob::print_on(outputStream* st) const { 520 CodeBlob::print_on(st); 521 print_value_on(st); 522 } 523 524 void BufferBlob::print_value_on(outputStream* st) const { 525 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name()); 526 } 527 528 void RuntimeStub::verify() { 529 // unimplemented 530 } 531 532 void RuntimeStub::print_on(outputStream* st) const { 533 ttyLocker ttyl; 534 CodeBlob::print_on(st); 535 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this)); 536 st->print_cr("%s", name()); 537 Disassembler::decode((CodeBlob*)this, st); 538 } 539 540 void RuntimeStub::print_value_on(outputStream* st) const { 541 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name()); 542 } 543 544 void SingletonBlob::verify() { 545 // unimplemented 546 } 547 548 void SingletonBlob::print_on(outputStream* st) const { 549 ttyLocker ttyl; 550 CodeBlob::print_on(st); 551 st->print_cr("%s", name()); 552 Disassembler::decode((CodeBlob*)this, st); 553 } 554 555 void SingletonBlob::print_value_on(outputStream* st) const { 556 st->print_cr("%s", name()); 557 } 558 559 void DeoptimizationBlob::print_value_on(outputStream* st) const { 560 st->print_cr("Deoptimization (frame not available)"); 561 }