1 /*
2 * Copyright (c) 1998, 2026, 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/icache.hpp"
44 #include "runtime/interfaceSupport.inline.hpp"
45 #include "runtime/javaFrameAnchor.hpp"
46 #include "runtime/jniHandles.inline.hpp"
47 #include "runtime/mutexLocker.hpp"
48 #include "runtime/safepoint.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/stubCodeGenerator.hpp"
51 #include "runtime/stubRoutines.hpp"
52 #include "runtime/vframe.hpp"
53 #include "services/memoryService.hpp"
54 #include "utilities/align.hpp"
55 #ifdef COMPILER1
56 #include "c1/c1_Runtime1.hpp"
57 #endif
58
59 // Virtual methods are not allowed in code blobs to simplify caching compiled code.
60 // Check all "leaf" subclasses of CodeBlob class.
61
62 static_assert(!std::is_polymorphic<nmethod>::value, "no virtual methods are allowed in nmethod");
63 static_assert(!std::is_polymorphic<AdapterBlob>::value, "no virtual methods are allowed in code blobs");
64 static_assert(!std::is_polymorphic<VtableBlob>::value, "no virtual methods are allowed in code blobs");
65 static_assert(!std::is_polymorphic<MethodHandlesAdapterBlob>::value, "no virtual methods are allowed in code blobs");
66 static_assert(!std::is_polymorphic<RuntimeStub>::value, "no virtual methods are allowed in code blobs");
67 static_assert(!std::is_polymorphic<DeoptimizationBlob>::value, "no virtual methods are allowed in code blobs");
68 static_assert(!std::is_polymorphic<SafepointBlob>::value, "no virtual methods are allowed in code blobs");
69 static_assert(!std::is_polymorphic<UpcallStub>::value, "no virtual methods are allowed in code blobs");
70 #ifdef COMPILER2
71 static_assert(!std::is_polymorphic<ExceptionBlob>::value, "no virtual methods are allowed in code blobs");
72 static_assert(!std::is_polymorphic<UncommonTrapBlob>::value, "no virtual methods are allowed in code blobs");
73 #endif
74
75 // Add proxy vtables.
76 // We need only few for now - they are used only from prints.
77 const nmethod::Vptr nmethod::_vpntr;
78 const BufferBlob::Vptr BufferBlob::_vpntr;
79 const RuntimeStub::Vptr RuntimeStub::_vpntr;
80 const SingletonBlob::Vptr SingletonBlob::_vpntr;
81 const DeoptimizationBlob::Vptr DeoptimizationBlob::_vpntr;
82 const SafepointBlob::Vptr SafepointBlob::_vpntr;
83 #ifdef COMPILER2
84 const ExceptionBlob::Vptr ExceptionBlob::_vpntr;
85 const UncommonTrapBlob::Vptr UncommonTrapBlob::_vpntr;
86 #endif // COMPILER2
87 const UpcallStub::Vptr UpcallStub::_vpntr;
88
89 const CodeBlob::Vptr* CodeBlob::vptr(CodeBlobKind kind) {
90 constexpr const CodeBlob::Vptr* array[(size_t)CodeBlobKind::Number_Of_Kinds] = {
91 nullptr/* None */,
92 &nmethod::_vpntr,
93 &BufferBlob::_vpntr,
94 &AdapterBlob::_vpntr,
95 &VtableBlob::_vpntr,
96 &MethodHandlesAdapterBlob::_vpntr,
97 &RuntimeStub::_vpntr,
98 &DeoptimizationBlob::_vpntr,
99 &SafepointBlob::_vpntr,
100 #ifdef COMPILER2
101 &ExceptionBlob::_vpntr,
102 &UncommonTrapBlob::_vpntr,
103 #endif
104 &UpcallStub::_vpntr
105 };
106
107 return array[(size_t)kind];
108 }
109
110 const CodeBlob::Vptr* CodeBlob::vptr() const {
111 return vptr(_kind);
112 }
113
114 unsigned int CodeBlob::align_code_offset(int offset) {
115 // align the size to CodeEntryAlignment
116 int header_size = (int)CodeHeap::header_size();
117 return align_up(offset + header_size, CodeEntryAlignment) - header_size;
118 }
119
120 // This must be consistent with the CodeBlob constructor's layout actions.
121 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
122 // align the size to CodeEntryAlignment
123 unsigned int size = align_code_offset(header_size);
124 size += align_up(cb->total_content_size(), oopSize);
125 size += align_up(cb->total_oop_size(), oopSize);
126 return size;
127 }
128
129 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
130 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
131 int mutable_data_size) :
132 _oop_maps(nullptr), // will be set by set_oop_maps() call
133 _name(name),
134 _mutable_data(header_begin() + size), // default value is blob_end()
135 _size(size),
136 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
137 _content_offset(CodeBlob::align_code_offset(header_size)),
138 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
139 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)),
140 _frame_size(frame_size),
141 _mutable_data_size(mutable_data_size),
142 S390_ONLY(_ctable_offset(0) COMMA)
143 _header_size(header_size),
144 _frame_complete_offset(frame_complete_offset),
145 _kind(kind),
146 _caller_must_gc_arguments(caller_must_gc_arguments)
147 {
148 assert(is_aligned(_size, oopSize), "unaligned size");
149 assert(is_aligned(header_size, oopSize), "unaligned size");
150 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
151 assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size);
152 assert(is_nmethod() || (cb->total_oop_size() + cb->total_metadata_size() == 0), "must be nmethod");
153 assert(code_end() == content_end(), "must be the same - see code_end()");
154 #ifdef COMPILER1
155 // probably wrong for tiered
156 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
157 #endif // COMPILER1
158
159 if (_mutable_data_size > 0) {
160 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
161 if (_mutable_data == nullptr) {
162 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
163 }
164 } else {
165 // We need unique and valid not null address
166 assert(_mutable_data == blob_end(), "sanity");
167 }
168
169 set_oop_maps(oop_maps);
170 }
171
172 // Simple CodeBlob used for simple BufferBlob.
173 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) :
174 _oop_maps(nullptr),
175 _name(name),
176 _mutable_data(header_begin() + size), // default value is blob_end()
177 _size(size),
178 _relocation_size(0),
179 _content_offset(CodeBlob::align_code_offset(header_size)),
180 _code_offset(_content_offset),
181 _data_offset(size),
182 _frame_size(0),
183 _mutable_data_size(0),
184 S390_ONLY(_ctable_offset(0) COMMA)
185 _header_size(header_size),
186 _frame_complete_offset(CodeOffsets::frame_never_safe),
187 _kind(kind),
188 _caller_must_gc_arguments(false)
189 {
190 assert(is_aligned(size, oopSize), "unaligned size");
191 assert(is_aligned(header_size, oopSize), "unaligned size");
192 assert(_mutable_data == blob_end(), "sanity");
193 }
194
195 void CodeBlob::purge() {
196 assert(_mutable_data != nullptr, "should never be null");
197 if (_mutable_data != blob_end()) {
198 os::free(_mutable_data);
199 _mutable_data = blob_end(); // Valid not null address
200 _mutable_data_size = 0;
201 _relocation_size = 0;
202 }
203 if (_oop_maps != nullptr) {
204 delete _oop_maps;
205 _oop_maps = nullptr;
206 }
207 NOT_PRODUCT(_asm_remarks.clear());
208 NOT_PRODUCT(_dbg_strings.clear());
209 }
210
211 void CodeBlob::set_oop_maps(OopMapSet* p) {
212 // Danger Will Robinson! This method allocates a big
213 // chunk of memory, its your job to free it.
214 if (p != nullptr) {
215 _oop_maps = ImmutableOopMapSet::build_from(p);
216 } else {
217 _oop_maps = nullptr;
218 }
219 }
220
221 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
222 assert(_oop_maps != nullptr, "nope");
223 return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
224 }
225
226 void CodeBlob::print_code_on(outputStream* st) {
227 ResourceMark m;
228 Disassembler::decode(this, st);
229 }
230
231 #if INCLUDE_CDS
232 void CodeBlob::restore_mutable_data(address reloc_data) {
233 // Relocation data is now stored as part of the mutable data area; allocate it before copy relocations
234 if (_mutable_data_size > 0) {
235 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
236 if (_mutable_data == nullptr) {
237 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
238 }
239 } else {
240 _mutable_data = blob_end(); // default value
241 }
242 if (_relocation_size > 0) {
243 assert(_mutable_data_size > 0, "relocation is part of mutable data section");
244 memcpy((address)relocation_begin(), reloc_data, relocation_size());
245 }
246 }
247
248 void CodeBlob::prepare_for_archiving_impl() {
249 set_name(nullptr);
250 _oop_maps = nullptr;
251 _mutable_data = nullptr;
252 #ifndef PRODUCT
253 asm_remarks().clear();
254 dbg_strings().clear();
255 #endif /* PRODUCT */
256 }
257
258 void CodeBlob::prepare_for_archiving() {
259 vptr(_kind)->prepare_for_archiving(this);
260 }
261
262 void CodeBlob::archive_blob(CodeBlob* blob, address archive_buffer) {
263 blob->copy_to(archive_buffer);
264 CodeBlob* archived_blob = (CodeBlob*)archive_buffer;
265 archived_blob->prepare_for_archiving();
266 }
267
268 void CodeBlob::post_restore_impl() {
269 // Track memory usage statistic after releasing CodeCache_lock
270 MemoryService::track_code_cache_memory_usage();
271 }
272
273 void CodeBlob::post_restore() {
274 vptr(_kind)->post_restore(this);
275 }
276
277 CodeBlob* CodeBlob::restore(address code_cache_buffer, AOTCodeReader* reader)
278 {
279 copy_to(code_cache_buffer);
280 CodeBlob* code_blob = (CodeBlob*)code_cache_buffer;
281 reader->restore(code_blob);
282 return code_blob;
283 }
284
285 CodeBlob* CodeBlob::create(CodeBlob* archived_blob, AOTCodeReader* reader)
286 {
287 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
288
289 CodeCache::gc_on_allocation();
290
291 CodeBlob* blob = nullptr;
292 unsigned int size = archived_blob->size();
293 {
294 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
295 address code_cache_buffer = (address)CodeCache::allocate(size, CodeBlobType::NonNMethod);
296 if (code_cache_buffer != nullptr) {
297 blob = archived_blob->restore(code_cache_buffer, reader);
298 assert(blob != nullptr, "sanity check");
299
300 // Flush the code block
301 ICache::invalidate_range(blob->code_begin(), blob->code_size());
302 CodeCache::commit(blob); // Count adapters
303 }
304 }
305 if (blob != nullptr) {
306 blob->post_restore();
307 }
308 return blob;
309 }
310
311 #endif // INCLUDE_CDS
312
313 //-----------------------------------------------------------------------------------------
314 // Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info.
315
316 RuntimeBlob::RuntimeBlob(
317 const char* name,
318 CodeBlobKind kind,
319 CodeBuffer* cb,
320 int size,
321 uint16_t header_size,
322 int16_t frame_complete,
323 int frame_size,
324 OopMapSet* oop_maps,
325 bool caller_must_gc_arguments)
326 : CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments,
327 align_up(cb->total_relocation_size(), oopSize))
328 {
329 if (code_size() == 0) {
330 // Nothing to copy
331 return;
332 }
333
334 cb->copy_code_and_locs_to(this);
335
336 // Flush generated code
337 ICache::invalidate_range(code_begin(), code_size());
338 }
339
340 void RuntimeBlob::free(RuntimeBlob* blob) {
341 assert(blob != nullptr, "caller must check for nullptr");
342 MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
343 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
344 blob->purge();
345 {
346 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
347 CodeCache::free(blob);
348 }
349 // Track memory usage statistic after releasing CodeCache_lock
350 MemoryService::track_code_cache_memory_usage();
351 }
352
353 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
354 // Do not hold the CodeCache lock during name formatting.
355 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
356
357 if (stub != nullptr && (PrintStubCode ||
358 Forte::is_enabled() ||
359 JvmtiExport::should_post_dynamic_code_generated())) {
360 ResourceMark rm;
361 const size_t name1_len = strlen(name1);
362 const size_t name2_len = strlen(name2);
363 const size_t stub_id_size = name1_len + name2_len + 1;
364 char* stub_id = NEW_RESOURCE_ARRAY(char, stub_id_size);
365 jio_snprintf(stub_id, stub_id_size, "%s%s", name1, name2);
366 if (PrintStubCode) {
367 ttyLocker ttyl;
368 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
369 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
370 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
371 Disassembler::decode(stub->code_begin(), stub->code_end(), tty
372 NOT_PRODUCT(COMMA &stub->asm_remarks()));
373 if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
374 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
375 stub->oop_maps()->print();
376 }
377 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
378 tty->cr();
379 }
380 if (Forte::is_enabled()) {
381 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
382 }
383
384 if (JvmtiExport::should_post_dynamic_code_generated()) {
385 const char* stub_name = name2;
386 if (name2[0] == '\0') stub_name = name1;
387 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
388 }
389 }
390
391 // Track memory usage statistic after releasing CodeCache_lock
392 MemoryService::track_code_cache_memory_usage();
393 }
394
395 //----------------------------------------------------------------------------------------------------
396 // Implementation of BufferBlob
397
398 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size)
399 : RuntimeBlob(name, kind, size, header_size)
400 {}
401
402 BufferBlob* BufferBlob::create(const char* name, uint buffer_size) {
403 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
404
405 BufferBlob* blob = nullptr;
406 unsigned int size = sizeof(BufferBlob);
407 // align the size to CodeEntryAlignment
408 size = CodeBlob::align_code_offset(size);
409 size += align_up(buffer_size, oopSize);
410 assert(name != nullptr, "must provide a name");
411 {
412 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
413 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size);
414 }
415 // Track memory usage statistic after releasing CodeCache_lock
416 MemoryService::track_code_cache_memory_usage();
417
418 return blob;
419 }
420
421
422 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size)
423 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, 0, nullptr)
424 {}
425
426 // Used by gtest
427 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
428 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
429
430 BufferBlob* blob = nullptr;
431 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
432 assert(name != nullptr, "must provide a name");
433 {
434 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
435 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size);
436 }
437 // Track memory usage statistic after releasing CodeCache_lock
438 MemoryService::track_code_cache_memory_usage();
439
440 return blob;
441 }
442
443 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
444 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
445 }
446
447 void BufferBlob::free(BufferBlob *blob) {
448 RuntimeBlob::free(blob);
449 }
450
451
452 //----------------------------------------------------------------------------------------------------
453 // Implementation of AdapterBlob
454
455 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) :
456 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size, sizeof(AdapterBlob)) {
457 assert(entry_offset[I2C] == 0, "sanity check");
458 #ifdef ASSERT
459 for (int i = 1; i < AdapterBlob::ENTRY_COUNT; i++) {
460 // The entry is within the adapter blob or unset.
461 int offset = entry_offset[i];
462 assert((offset > 0 && offset < cb->insts()->size()) ||
463 (i >= C2I_No_Clinit_Check && offset == -1),
464 "invalid entry offset[%d] = 0x%x", i, offset);
465 }
466 #endif // ASSERT
467 _c2i_offset = entry_offset[C2I];
468 _c2i_unverified_offset = entry_offset[C2I_Unverified];
469 _c2i_no_clinit_check_offset = entry_offset[C2I_No_Clinit_Check];
470 CodeCache::commit(this);
471 }
472
473 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) {
474 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
475
476 CodeCache::gc_on_allocation();
477
478 AdapterBlob* blob = nullptr;
479 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
480 {
481 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
482 blob = new (size) AdapterBlob(size, cb, entry_offset);
483 }
484 // Track memory usage statistic after releasing CodeCache_lock
485 MemoryService::track_code_cache_memory_usage();
486
487 return blob;
488 }
489
490 //----------------------------------------------------------------------------------------------------
491 // Implementation of VtableBlob
492
493 void* VtableBlob::operator new(size_t s, unsigned size) throw() {
494 // Handling of allocation failure stops compilation and prints a bunch of
495 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
496 // can be locked, and then re-locking the CodeCache_lock. That is not safe in
497 // this context as we hold the CompiledICLocker. So we just don't handle code
498 // cache exhaustion here; we leave that for a later allocation that does not
499 // hold the CompiledICLocker.
500 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
501 }
502
503 VtableBlob::VtableBlob(const char* name, int size) :
504 BufferBlob(name, CodeBlobKind::Vtable, size) {
505 }
506
507 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
508 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
509
510 VtableBlob* blob = nullptr;
511 unsigned int size = sizeof(VtableBlob);
512 // align the size to CodeEntryAlignment
513 size = align_code_offset(size);
514 size += align_up(buffer_size, oopSize);
515 assert(name != nullptr, "must provide a name");
516 {
517 if (!CodeCache_lock->try_lock()) {
518 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
519 // IC transition to megamorphic, for which this stub will be needed. It is better to
520 // bail out the transition, and wait for a more opportune moment. Not only is it not
521 // worth waiting for the lock blockingly for the megamorphic transition, it might
522 // also result in a deadlock to blockingly wait, when concurrent class unloading is
523 // performed. At this point in time, the CompiledICLocker is taken, so we are not
524 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
525 // consistently taken in the opposite order. Bailing out results in an IC transition to
526 // the clean state instead, which will cause subsequent calls to retry the transitioning
527 // eventually.
528 return nullptr;
529 }
530
531 MACOS_AARCH64_ONLY(os::thread_wx_enable_write());
532 blob = new (size) VtableBlob(name, size);
533 CodeCache_lock->unlock();
534 }
535 // Track memory usage statistic after releasing CodeCache_lock
536 MemoryService::track_code_cache_memory_usage();
537
538 return blob;
539 }
540
541 //----------------------------------------------------------------------------------------------------
542 // Implementation of MethodHandlesAdapterBlob
543
544 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
545 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
546
547 MethodHandlesAdapterBlob* blob = nullptr;
548 unsigned int size = sizeof(MethodHandlesAdapterBlob);
549 // align the size to CodeEntryAlignment
550 size = CodeBlob::align_code_offset(size);
551 size += align_up(buffer_size, oopSize);
552 {
553 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
554 blob = new (size) MethodHandlesAdapterBlob(size);
555 if (blob == nullptr) {
556 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
557 }
558 }
559 // Track memory usage statistic after releasing CodeCache_lock
560 MemoryService::track_code_cache_memory_usage();
561
562 return blob;
563 }
564
565 //----------------------------------------------------------------------------------------------------
566 // Implementation of RuntimeStub
567
568 RuntimeStub::RuntimeStub(
569 const char* name,
570 CodeBuffer* cb,
571 int size,
572 int16_t frame_complete,
573 int frame_size,
574 OopMapSet* oop_maps,
575 bool caller_must_gc_arguments
576 )
577 : RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub),
578 frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
579 {
580 }
581
582 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
583 CodeBuffer* cb,
584 int16_t frame_complete,
585 int frame_size,
586 OopMapSet* oop_maps,
587 bool caller_must_gc_arguments,
588 bool alloc_fail_is_fatal)
589 {
590 RuntimeStub* stub = nullptr;
591 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
592 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
593 {
594 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
595 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
596 if (stub == nullptr) {
597 if (!alloc_fail_is_fatal) {
598 return nullptr;
599 }
600 fatal("Initial size of CodeCache is too small");
601 }
602 }
603
604 trace_new_stub(stub, "RuntimeStub - ", stub_name);
605
606 return stub;
607 }
608
609
610 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
611 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
612 }
613
614 // operator new shared by all singletons:
615 void* SingletonBlob::operator new(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() {
616 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
617 if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small");
618 return p;
619 }
620
621
622 //----------------------------------------------------------------------------------------------------
623 // Implementation of DeoptimizationBlob
624
625 DeoptimizationBlob::DeoptimizationBlob(
626 CodeBuffer* cb,
627 int size,
628 OopMapSet* oop_maps,
629 int unpack_offset,
630 int unpack_with_exception_offset,
631 int unpack_with_reexecution_offset,
632 int frame_size
633 )
634 : SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
635 size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
636 {
637 _unpack_offset = unpack_offset;
638 _unpack_with_exception = unpack_with_exception_offset;
639 _unpack_with_reexecution = unpack_with_reexecution_offset;
640 #ifdef COMPILER1
641 _unpack_with_exception_in_tls = -1;
642 #endif
643 }
644
645
646 DeoptimizationBlob* DeoptimizationBlob::create(
647 CodeBuffer* cb,
648 OopMapSet* oop_maps,
649 int unpack_offset,
650 int unpack_with_exception_offset,
651 int unpack_with_reexecution_offset,
652 int frame_size)
653 {
654 DeoptimizationBlob* blob = nullptr;
655 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
656 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
657 {
658 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
659 blob = new (size) DeoptimizationBlob(cb,
660 size,
661 oop_maps,
662 unpack_offset,
663 unpack_with_exception_offset,
664 unpack_with_reexecution_offset,
665 frame_size);
666 }
667
668 trace_new_stub(blob, "DeoptimizationBlob");
669
670 return blob;
671 }
672
673 #ifdef COMPILER2
674
675 //----------------------------------------------------------------------------------------------------
676 // Implementation of UncommonTrapBlob
677
678 UncommonTrapBlob::UncommonTrapBlob(
679 CodeBuffer* cb,
680 int size,
681 OopMapSet* oop_maps,
682 int frame_size
683 )
684 : SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb,
685 size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
686 {}
687
688
689 UncommonTrapBlob* UncommonTrapBlob::create(
690 CodeBuffer* cb,
691 OopMapSet* oop_maps,
692 int frame_size)
693 {
694 UncommonTrapBlob* blob = nullptr;
695 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
696 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
697 {
698 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
699 blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size);
700 }
701
702 trace_new_stub(blob, "UncommonTrapBlob");
703
704 return blob;
705 }
706
707 //----------------------------------------------------------------------------------------------------
708 // Implementation of ExceptionBlob
709
710 ExceptionBlob::ExceptionBlob(
711 CodeBuffer* cb,
712 int size,
713 OopMapSet* oop_maps,
714 int frame_size
715 )
716 : SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
717 size, sizeof(ExceptionBlob), frame_size, oop_maps)
718 {}
719
720
721 ExceptionBlob* ExceptionBlob::create(
722 CodeBuffer* cb,
723 OopMapSet* oop_maps,
724 int frame_size)
725 {
726 ExceptionBlob* blob = nullptr;
727 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
728 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
729 {
730 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
731 blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size);
732 }
733
734 trace_new_stub(blob, "ExceptionBlob");
735
736 return blob;
737 }
738
739 #endif // COMPILER2
740
741 //----------------------------------------------------------------------------------------------------
742 // Implementation of SafepointBlob
743
744 SafepointBlob::SafepointBlob(
745 CodeBuffer* cb,
746 int size,
747 OopMapSet* oop_maps,
748 int frame_size
749 )
750 : SingletonBlob(cb->name(), CodeBlobKind::Safepoint, cb,
751 size, sizeof(SafepointBlob), frame_size, oop_maps)
752 {}
753
754
755 SafepointBlob* SafepointBlob::create(
756 CodeBuffer* cb,
757 OopMapSet* oop_maps,
758 int frame_size)
759 {
760 SafepointBlob* blob = nullptr;
761 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
762 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
763 {
764 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
765 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
766 }
767
768 trace_new_stub(blob, "SafepointBlob - ", blob->name());
769
770 return blob;
771 }
772
773 //----------------------------------------------------------------------------------------------------
774 // Implementation of UpcallStub
775
776 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
777 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
778 CodeOffsets::frame_never_safe, 0 /* no frame size */,
779 /* oop maps = */ nullptr, /* caller must gc arguments = */ false),
780 _receiver(receiver),
781 _frame_data_offset(frame_data_offset)
782 {
783 CodeCache::commit(this);
784 }
785
786 void* UpcallStub::operator new(size_t s, unsigned size) throw() {
787 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
788 }
789
790 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
791 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
792
793 UpcallStub* blob = nullptr;
794 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
795 {
796 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
797 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
798 }
799 if (blob == nullptr) {
800 return nullptr; // caller must handle this
801 }
802
803 // Track memory usage statistic after releasing CodeCache_lock
804 MemoryService::track_code_cache_memory_usage();
805
806 trace_new_stub(blob, "UpcallStub - ", name);
807
808 return blob;
809 }
810
811 void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
812 frame_data_for_frame(frame)->old_handles->oops_do(f);
813 }
814
815 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
816 return &frame_data_for_frame(frame)->jfa;
817 }
818
819 void UpcallStub::free(UpcallStub* blob) {
820 assert(blob != nullptr, "caller must check for nullptr");
821 JNIHandles::destroy_global(blob->receiver());
822 RuntimeBlob::free(blob);
823 }
824
825 //----------------------------------------------------------------------------------------------------
826 // Verification and printing
827
828 void CodeBlob::verify() {
829 if (is_nmethod()) {
830 as_nmethod()->verify();
831 }
832 }
833
834 void CodeBlob::print_on(outputStream* st) const {
835 vptr()->print_on(this, st);
836 }
837
838 void CodeBlob::print() const { print_on(tty); }
839
840 void CodeBlob::print_value_on(outputStream* st) const {
841 vptr()->print_value_on(this, st);
842 }
843
844 void CodeBlob::print_on_impl(outputStream* st) const {
845 st->print_cr("[CodeBlob kind:%d (" INTPTR_FORMAT ")]", (int)_kind, p2i(this));
846 st->print_cr("Framesize: %d", _frame_size);
847 }
848
849 void CodeBlob::print_value_on_impl(outputStream* st) const {
850 st->print_cr("[CodeBlob]");
851 }
852
853 void CodeBlob::print_block_comment(outputStream* stream, address block_begin) const {
854 #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
855 if (is_nmethod()) {
856 as_nmethod()->print_nmethod_labels(stream, block_begin);
857 }
858 #endif
859
860 #ifndef PRODUCT
861 ptrdiff_t offset = block_begin - code_begin();
862 assert(offset >= 0, "Expecting non-negative offset!");
863 _asm_remarks.print(uint(offset), stream);
864 #endif
865 }
866
867 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
868 if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) {
869 // the interpreter is generated into a buffer blob
870 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
871 if (i != nullptr) {
872 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
873 i->print_on(st);
874 return;
875 }
876 if (Interpreter::contains(addr)) {
877 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
878 " (not bytecode specific)", p2i(addr));
879 return;
880 }
881 //
882 if (is_adapter_blob()) {
883 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
884 AdapterHandlerLibrary::print_handler_on(st, this);
885 return;
886 }
887 // the stubroutines are generated into a buffer blob
888 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
889 if (d != nullptr) {
890 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
891 d->print_on(st);
892 st->cr();
893 return;
894 }
895 if (StubRoutines::contains(addr)) {
896 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
897 return;
898 }
899 VtableStub* v = VtableStubs::stub_containing(addr);
900 if (v != nullptr) {
901 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
902 v->print_on(st);
903 st->cr();
904 return;
905 }
906 }
907 if (is_nmethod()) {
908 nmethod* nm = as_nmethod();
909 ResourceMark rm;
910 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
911 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
912 if (verbose) {
913 st->print(" for ");
914 nm->method()->print_value_on(st);
915 }
916 st->cr();
917 if (verbose && st == tty) {
918 // verbose is only ever true when called from findpc in debug.cpp
919 nm->print_nmethod(true);
920 } else {
921 nm->print_on(st);
922 nm->print_code_snippet(st, addr);
923 }
924 return;
925 }
926 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
927 print_on(st);
928 }
929
930 void BufferBlob::print_on_impl(outputStream* st) const {
931 RuntimeBlob::print_on_impl(st);
932 print_value_on_impl(st);
933 }
934
935 void BufferBlob::print_value_on_impl(outputStream* st) const {
936 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
937 }
938
939 void RuntimeStub::print_on_impl(outputStream* st) const {
940 ttyLocker ttyl;
941 RuntimeBlob::print_on_impl(st);
942 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
943 st->print_cr("%s", name());
944 Disassembler::decode((CodeBlob*)this, st);
945 }
946
947 void RuntimeStub::print_value_on_impl(outputStream* st) const {
948 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
949 }
950
951 void SingletonBlob::print_on_impl(outputStream* st) const {
952 ttyLocker ttyl;
953 RuntimeBlob::print_on_impl(st);
954 st->print_cr("%s", name());
955 Disassembler::decode((CodeBlob*)this, st);
956 }
957
958 void SingletonBlob::print_value_on_impl(outputStream* st) const {
959 st->print_cr("%s", name());
960 }
961
962 void DeoptimizationBlob::print_value_on_impl(outputStream* st) const {
963 st->print_cr("Deoptimization (frame not available)");
964 }
965
966 void UpcallStub::print_on_impl(outputStream* st) const {
967 RuntimeBlob::print_on_impl(st);
968 print_value_on_impl(st);
969 st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
970 oop recv = JNIHandles::resolve(_receiver);
971 st->print("Receiver MH=");
972 recv->print_on(st);
973 Disassembler::decode((CodeBlob*)this, st);
974 }
975
976 void UpcallStub::print_value_on_impl(outputStream* st) const {
977 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
978 }