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/codeBlob.hpp"
26 #include "code/codeCache.hpp"
27 #include "code/relocInfo.hpp"
28 #include "code/vtableStubs.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "compiler/oopMap.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "jvm.h"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/heap.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/forte.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/interfaceSupport.inline.hpp"
42 #include "runtime/javaFrameAnchor.hpp"
43 #include "runtime/jniHandles.inline.hpp"
44 #include "runtime/mutexLocker.hpp"
45 #include "runtime/safepoint.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "runtime/stubCodeGenerator.hpp"
48 #include "runtime/stubRoutines.hpp"
49 #include "runtime/vframe.hpp"
50 #include "services/memoryService.hpp"
51 #include "utilities/align.hpp"
52 #ifdef COMPILER1
53 #include "c1/c1_Runtime1.hpp"
54 #endif
55
56 #include <type_traits>
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<BufferedInlineTypeBlob>::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 #ifdef COMPILER2
83 const ExceptionBlob::Vptr ExceptionBlob::_vpntr;
84 #endif // COMPILER2
85 const UpcallStub::Vptr UpcallStub::_vpntr;
86
87 const CodeBlob::Vptr* CodeBlob::vptr(CodeBlobKind kind) {
88 constexpr const CodeBlob::Vptr* array[(size_t)CodeBlobKind::Number_Of_Kinds] = {
89 nullptr/* None */,
90 &nmethod::_vpntr,
91 &BufferBlob::_vpntr,
92 &AdapterBlob::_vpntr,
93 &VtableBlob::_vpntr,
94 &MethodHandlesAdapterBlob::_vpntr,
95 &BufferedInlineTypeBlob::_vpntr,
96 &RuntimeStub::_vpntr,
97 &DeoptimizationBlob::_vpntr,
98 &SafepointBlob::_vpntr,
99 #ifdef COMPILER2
100 &ExceptionBlob::_vpntr,
101 &UncommonTrapBlob::_vpntr,
102 #endif
103 &UpcallStub::_vpntr
104 };
105
106 return array[(size_t)kind];
107 }
108
109 const CodeBlob::Vptr* CodeBlob::vptr() const {
110 return vptr(_kind);
111 }
112
113 unsigned int CodeBlob::align_code_offset(int offset) {
114 // align the size to CodeEntryAlignment
115 int header_size = (int)CodeHeap::header_size();
116 return align_up(offset + header_size, CodeEntryAlignment) - header_size;
117 }
118
119 // This must be consistent with the CodeBlob constructor's layout actions.
120 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
121 // align the size to CodeEntryAlignment
122 unsigned int size = align_code_offset(header_size);
123 size += align_up(cb->total_content_size(), oopSize);
124 size += align_up(cb->total_oop_size(), oopSize);
125 return size;
126 }
127
128 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
129 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
130 int mutable_data_size) :
131 _oop_maps(nullptr), // will be set by set_oop_maps() call
132 _name(name),
133 _mutable_data(header_begin() + size), // default value is blob_end()
134 _size(size),
135 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
136 _content_offset(CodeBlob::align_code_offset(header_size)),
137 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
138 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)),
139 _frame_size(frame_size),
140 _mutable_data_size(mutable_data_size),
141 S390_ONLY(_ctable_offset(0) COMMA)
142 _header_size(header_size),
143 _frame_complete_offset(frame_complete_offset),
144 _kind(kind),
145 _caller_must_gc_arguments(caller_must_gc_arguments)
146 {
147 assert(is_aligned(_size, oopSize), "unaligned size");
148 assert(is_aligned(header_size, oopSize), "unaligned size");
149 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
150 assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size);
151 assert(is_nmethod() || (cb->total_oop_size() + cb->total_metadata_size() == 0), "must be nmethod");
152 assert(code_end() == content_end(), "must be the same - see code_end()");
153 #ifdef COMPILER1
154 // probably wrong for tiered
155 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
156 #endif // COMPILER1
157
158 if (_mutable_data_size > 0) {
159 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
160 if (_mutable_data == nullptr) {
161 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
162 }
163 } else {
164 // We need unique and valid not null address
165 assert(_mutable_data = blob_end(), "sanity");
166 }
167
168 set_oop_maps(oop_maps);
169 }
170
171 // Simple CodeBlob used for simple BufferBlob.
172 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) :
173 _oop_maps(nullptr),
174 _name(name),
175 _mutable_data(header_begin() + size), // default value is blob_end()
176 _size(size),
177 _relocation_size(0),
178 _content_offset(CodeBlob::align_code_offset(header_size)),
179 _code_offset(_content_offset),
180 _data_offset(size),
181 _frame_size(0),
182 S390_ONLY(_ctable_offset(0) COMMA)
183 _header_size(header_size),
184 _frame_complete_offset(CodeOffsets::frame_never_safe),
185 _kind(kind),
186 _caller_must_gc_arguments(false)
187 {
188 assert(is_aligned(size, oopSize), "unaligned size");
189 assert(is_aligned(header_size, oopSize), "unaligned size");
190 assert(_mutable_data = blob_end(), "sanity");
191 }
192
193 void CodeBlob::restore_mutable_data(address reloc_data) {
194 // Relocation data is now stored as part of the mutable data area; allocate it before copy relocations
195 if (_mutable_data_size > 0) {
196 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
197 if (_mutable_data == nullptr) {
198 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
199 }
200 }
201 if (_relocation_size > 0) {
202 memcpy((address)relocation_begin(), reloc_data, relocation_size());
203 }
204 }
205
206 void CodeBlob::purge() {
207 assert(_mutable_data != nullptr, "should never be null");
208 if (_mutable_data != blob_end()) {
209 os::free(_mutable_data);
210 _mutable_data = blob_end(); // Valid not null address
211 _mutable_data_size = 0;
212 _relocation_size = 0;
213 }
214 if (_oop_maps != nullptr) {
215 delete _oop_maps;
216 _oop_maps = nullptr;
217 }
218 NOT_PRODUCT(_asm_remarks.clear());
219 NOT_PRODUCT(_dbg_strings.clear());
220 }
221
222 void CodeBlob::set_oop_maps(OopMapSet* p) {
223 // Danger Will Robinson! This method allocates a big
224 // chunk of memory, its your job to free it.
225 if (p != nullptr) {
226 _oop_maps = ImmutableOopMapSet::build_from(p);
227 } else {
228 _oop_maps = nullptr;
229 }
230 }
231
232 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
233 assert(_oop_maps != nullptr, "nope");
234 return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
235 }
236
237 void CodeBlob::print_code_on(outputStream* st) {
238 ResourceMark m;
239 Disassembler::decode(this, st);
240 }
241
242 void CodeBlob::prepare_for_archiving_impl() {
243 set_name(nullptr);
244 _oop_maps = nullptr;
245 _mutable_data = nullptr;
246 #ifndef PRODUCT
247 asm_remarks().clear();
248 dbg_strings().clear();
249 #endif /* PRODUCT */
250 }
251
252 void CodeBlob::prepare_for_archiving() {
253 vptr(_kind)->prepare_for_archiving(this);
254 }
255
256 void CodeBlob::archive_blob(CodeBlob* blob, address archive_buffer) {
257 blob->copy_to(archive_buffer);
258 CodeBlob* archived_blob = (CodeBlob*)archive_buffer;
259 archived_blob->prepare_for_archiving();
260 }
261
262 void CodeBlob::post_restore_impl() {
263 // Track memory usage statistic after releasing CodeCache_lock
264 MemoryService::track_code_cache_memory_usage();
265 }
266
267 void CodeBlob::post_restore() {
268 vptr(_kind)->post_restore(this);
269 }
270
271 CodeBlob* CodeBlob::restore(address code_cache_buffer,
272 const char* name,
273 address archived_reloc_data,
274 ImmutableOopMapSet* archived_oop_maps)
275 {
276 copy_to(code_cache_buffer);
277 CodeBlob* code_blob = (CodeBlob*)code_cache_buffer;
278 code_blob->set_name(name);
279 code_blob->restore_mutable_data(archived_reloc_data);
280 code_blob->set_oop_maps(archived_oop_maps);
281 return code_blob;
282 }
283
284 CodeBlob* CodeBlob::create(CodeBlob* archived_blob,
285 const char* name,
286 address archived_reloc_data,
287 ImmutableOopMapSet* archived_oop_maps
288 )
289 {
290 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
291
292 CodeCache::gc_on_allocation();
293
294 CodeBlob* blob = nullptr;
295 unsigned int size = archived_blob->size();
296 {
297 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
298 address code_cache_buffer = (address)CodeCache::allocate(size, CodeBlobType::NonNMethod);
299 if (code_cache_buffer != nullptr) {
300 blob = archived_blob->restore(code_cache_buffer,
301 name,
302 archived_reloc_data,
303 archived_oop_maps);
304 assert(blob != nullptr, "sanity check");
305
306 // Flush the code block
307 ICache::invalidate_range(blob->code_begin(), blob->code_size());
308 CodeCache::commit(blob); // Count adapters
309 }
310 }
311 if (blob != nullptr) {
312 blob->post_restore();
313 }
314 return blob;
315 }
316
317 //-----------------------------------------------------------------------------------------
318 // Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info.
319
320 RuntimeBlob::RuntimeBlob(
321 const char* name,
322 CodeBlobKind kind,
323 CodeBuffer* cb,
324 int size,
325 uint16_t header_size,
326 int16_t frame_complete,
327 int frame_size,
328 OopMapSet* oop_maps,
329 bool caller_must_gc_arguments)
330 : CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments,
331 align_up(cb->total_relocation_size(), oopSize))
332 {
333 cb->copy_code_and_locs_to(this);
334 }
335
336 void RuntimeBlob::free(RuntimeBlob* blob) {
337 assert(blob != nullptr, "caller must check for nullptr");
338 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
339 blob->purge();
340 {
341 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
342 CodeCache::free(blob);
343 }
344 // Track memory usage statistic after releasing CodeCache_lock
345 MemoryService::track_code_cache_memory_usage();
346 }
347
348 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
349 // Do not hold the CodeCache lock during name formatting.
350 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
351
352 if (stub != nullptr && (PrintStubCode ||
353 Forte::is_enabled() ||
354 JvmtiExport::should_post_dynamic_code_generated())) {
355 char stub_id[256];
356 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
357 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
358 if (PrintStubCode) {
359 ttyLocker ttyl;
360 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
361 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
362 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
363 Disassembler::decode(stub->code_begin(), stub->code_end(), tty
364 NOT_PRODUCT(COMMA &stub->asm_remarks()));
365 if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
366 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
367 stub->oop_maps()->print();
368 }
369 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
370 tty->cr();
371 }
372 if (Forte::is_enabled()) {
373 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
374 }
375
376 if (JvmtiExport::should_post_dynamic_code_generated()) {
377 const char* stub_name = name2;
378 if (name2[0] == '\0') stub_name = name1;
379 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
380 }
381 }
382
383 // Track memory usage statistic after releasing CodeCache_lock
384 MemoryService::track_code_cache_memory_usage();
385 }
386
387 //----------------------------------------------------------------------------------------------------
388 // Implementation of BufferBlob
389
390 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, int size)
391 : RuntimeBlob(name, kind, size, sizeof(BufferBlob))
392 {}
393
394 BufferBlob* BufferBlob::create(const char* name, uint buffer_size) {
395 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
396
397 BufferBlob* blob = nullptr;
398 unsigned int size = sizeof(BufferBlob);
399 // align the size to CodeEntryAlignment
400 size = CodeBlob::align_code_offset(size);
401 size += align_up(buffer_size, oopSize);
402 assert(name != nullptr, "must provide a name");
403 {
404 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
405 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size);
406 }
407 // Track memory usage statistic after releasing CodeCache_lock
408 MemoryService::track_code_cache_memory_usage();
409
410 return blob;
411 }
412
413
414 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, int header_size)
415 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, 0, nullptr)
416 {}
417
418 // Used by gtest
419 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
420 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
421
422 BufferBlob* blob = nullptr;
423 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
424 assert(name != nullptr, "must provide a name");
425 {
426 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
427 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size, sizeof(BufferBlob));
428 }
429 // Track memory usage statistic after releasing CodeCache_lock
430 MemoryService::track_code_cache_memory_usage();
431
432 return blob;
433 }
434
435 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
436 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
437 }
438
439 void BufferBlob::free(BufferBlob *blob) {
440 RuntimeBlob::free(blob);
441 }
442
443 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments)
444 : RuntimeBlob(name, kind, cb, size, sizeof(BufferBlob), frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
445 {}
446
447
448 //----------------------------------------------------------------------------------------------------
449 // Implementation of AdapterBlob
450
451 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) :
452 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments) {
453 CodeCache::commit(this);
454 }
455
456 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) {
457 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
458
459 CodeCache::gc_on_allocation();
460
461 AdapterBlob* blob = nullptr;
462 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
463 {
464 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
465 blob = new (size) AdapterBlob(size, cb, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
466 }
467 // Track memory usage statistic after releasing CodeCache_lock
468 MemoryService::track_code_cache_memory_usage();
469
470 return blob;
471 }
472
473 //----------------------------------------------------------------------------------------------------
474 // Implementation of VtableBlob
475
476 void* VtableBlob::operator new(size_t s, unsigned size) throw() {
477 // Handling of allocation failure stops compilation and prints a bunch of
478 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
479 // can be locked, and then re-locking the CodeCache_lock. That is not safe in
480 // this context as we hold the CompiledICLocker. So we just don't handle code
481 // cache exhaustion here; we leave that for a later allocation that does not
482 // hold the CompiledICLocker.
483 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
484 }
485
486 VtableBlob::VtableBlob(const char* name, int size) :
487 BufferBlob(name, CodeBlobKind::Vtable, size) {
488 }
489
490 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
491 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
492
493 VtableBlob* blob = nullptr;
494 unsigned int size = sizeof(VtableBlob);
495 // align the size to CodeEntryAlignment
496 size = align_code_offset(size);
497 size += align_up(buffer_size, oopSize);
498 assert(name != nullptr, "must provide a name");
499 {
500 if (!CodeCache_lock->try_lock()) {
501 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
502 // IC transition to megamorphic, for which this stub will be needed. It is better to
503 // bail out the transition, and wait for a more opportune moment. Not only is it not
504 // worth waiting for the lock blockingly for the megamorphic transition, it might
505 // also result in a deadlock to blockingly wait, when concurrent class unloading is
506 // performed. At this point in time, the CompiledICLocker is taken, so we are not
507 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
508 // consistently taken in the opposite order. Bailing out results in an IC transition to
509 // the clean state instead, which will cause subsequent calls to retry the transitioning
510 // eventually.
511 return nullptr;
512 }
513 blob = new (size) VtableBlob(name, size);
514 CodeCache_lock->unlock();
515 }
516 // Track memory usage statistic after releasing CodeCache_lock
517 MemoryService::track_code_cache_memory_usage();
518
519 return blob;
520 }
521
522 //----------------------------------------------------------------------------------------------------
523 // Implementation of MethodHandlesAdapterBlob
524
525 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
526 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
527
528 MethodHandlesAdapterBlob* blob = nullptr;
529 unsigned int size = sizeof(MethodHandlesAdapterBlob);
530 // align the size to CodeEntryAlignment
531 size = CodeBlob::align_code_offset(size);
532 size += align_up(buffer_size, oopSize);
533 {
534 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
535 blob = new (size) MethodHandlesAdapterBlob(size);
536 if (blob == nullptr) {
537 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
538 }
539 }
540 // Track memory usage statistic after releasing CodeCache_lock
541 MemoryService::track_code_cache_memory_usage();
542
543 return blob;
544 }
545
546 //----------------------------------------------------------------------------------------------------
547 // Implementation of BufferedInlineTypeBlob
548 BufferedInlineTypeBlob::BufferedInlineTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off) :
549 BufferBlob("buffered inline type", CodeBlobKind::BufferedInlineType, cb, size, sizeof(BufferedInlineTypeBlob)),
550 _pack_fields_off(pack_fields_off),
551 _pack_fields_jobject_off(pack_fields_jobject_off),
552 _unpack_fields_off(unpack_fields_off) {
553 CodeCache::commit(this);
554 }
555
556 BufferedInlineTypeBlob* BufferedInlineTypeBlob::create(CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off) {
557 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
558
559 BufferedInlineTypeBlob* blob = nullptr;
560 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferedInlineTypeBlob));
561 {
562 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
563 blob = new (size) BufferedInlineTypeBlob(size, cb, pack_fields_off, pack_fields_jobject_off, unpack_fields_off);
564 }
565 // Track memory usage statistic after releasing CodeCache_lock
566 MemoryService::track_code_cache_memory_usage();
567
568 return blob;
569 }
570
571 //----------------------------------------------------------------------------------------------------
572 // Implementation of RuntimeStub
573
574 RuntimeStub::RuntimeStub(
575 const char* name,
576 CodeBuffer* cb,
577 int size,
578 int16_t frame_complete,
579 int frame_size,
580 OopMapSet* oop_maps,
581 bool caller_must_gc_arguments
582 )
583 : RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub),
584 frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
585 {
586 }
587
588 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
589 CodeBuffer* cb,
590 int16_t frame_complete,
591 int frame_size,
592 OopMapSet* oop_maps,
593 bool caller_must_gc_arguments,
594 bool alloc_fail_is_fatal)
595 {
596 RuntimeStub* stub = nullptr;
597 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
598 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
599 {
600 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
601 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
602 if (stub == nullptr) {
603 if (!alloc_fail_is_fatal) {
604 return nullptr;
605 }
606 fatal("Initial size of CodeCache is too small");
607 }
608 }
609
610 trace_new_stub(stub, "RuntimeStub - ", stub_name);
611
612 return stub;
613 }
614
615
616 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
617 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
618 }
619
620 // operator new shared by all singletons:
621 void* SingletonBlob::operator new(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() {
622 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
623 if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small");
624 return p;
625 }
626
627
628 //----------------------------------------------------------------------------------------------------
629 // Implementation of DeoptimizationBlob
630
631 DeoptimizationBlob::DeoptimizationBlob(
632 CodeBuffer* cb,
633 int size,
634 OopMapSet* oop_maps,
635 int unpack_offset,
636 int unpack_with_exception_offset,
637 int unpack_with_reexecution_offset,
638 int frame_size
639 )
640 : SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
641 size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
642 {
643 _unpack_offset = unpack_offset;
644 _unpack_with_exception = unpack_with_exception_offset;
645 _unpack_with_reexecution = unpack_with_reexecution_offset;
646 #ifdef COMPILER1
647 _unpack_with_exception_in_tls = -1;
648 #endif
649 }
650
651
652 DeoptimizationBlob* DeoptimizationBlob::create(
653 CodeBuffer* cb,
654 OopMapSet* oop_maps,
655 int unpack_offset,
656 int unpack_with_exception_offset,
657 int unpack_with_reexecution_offset,
658 int frame_size)
659 {
660 DeoptimizationBlob* blob = nullptr;
661 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
662 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
663 {
664 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
665 blob = new (size) DeoptimizationBlob(cb,
666 size,
667 oop_maps,
668 unpack_offset,
669 unpack_with_exception_offset,
670 unpack_with_reexecution_offset,
671 frame_size);
672 }
673
674 trace_new_stub(blob, "DeoptimizationBlob");
675
676 return blob;
677 }
678
679 #ifdef COMPILER2
680
681 //----------------------------------------------------------------------------------------------------
682 // Implementation of UncommonTrapBlob
683
684 UncommonTrapBlob::UncommonTrapBlob(
685 CodeBuffer* cb,
686 int size,
687 OopMapSet* oop_maps,
688 int frame_size
689 )
690 : SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb,
691 size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
692 {}
693
694
695 UncommonTrapBlob* UncommonTrapBlob::create(
696 CodeBuffer* cb,
697 OopMapSet* oop_maps,
698 int frame_size)
699 {
700 UncommonTrapBlob* blob = nullptr;
701 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
702 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
703 {
704 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
705 blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size);
706 }
707
708 trace_new_stub(blob, "UncommonTrapBlob");
709
710 return blob;
711 }
712
713 //----------------------------------------------------------------------------------------------------
714 // Implementation of ExceptionBlob
715
716 ExceptionBlob::ExceptionBlob(
717 CodeBuffer* cb,
718 int size,
719 OopMapSet* oop_maps,
720 int frame_size
721 )
722 : SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
723 size, sizeof(ExceptionBlob), frame_size, oop_maps)
724 {}
725
726
727 ExceptionBlob* ExceptionBlob::create(
728 CodeBuffer* cb,
729 OopMapSet* oop_maps,
730 int frame_size)
731 {
732 ExceptionBlob* blob = nullptr;
733 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
734 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
735 {
736 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
737 blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size);
738 }
739
740 trace_new_stub(blob, "ExceptionBlob");
741
742 return blob;
743 }
744
745 #endif // COMPILER2
746
747 //----------------------------------------------------------------------------------------------------
748 // Implementation of SafepointBlob
749
750 SafepointBlob::SafepointBlob(
751 CodeBuffer* cb,
752 int size,
753 OopMapSet* oop_maps,
754 int frame_size
755 )
756 : SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb,
757 size, sizeof(SafepointBlob), frame_size, oop_maps)
758 {}
759
760
761 SafepointBlob* SafepointBlob::create(
762 CodeBuffer* cb,
763 OopMapSet* oop_maps,
764 int frame_size)
765 {
766 SafepointBlob* blob = nullptr;
767 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
768 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
769 {
770 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
771 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
772 }
773
774 trace_new_stub(blob, "SafepointBlob");
775
776 return blob;
777 }
778
779 //----------------------------------------------------------------------------------------------------
780 // Implementation of UpcallStub
781
782 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
783 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
784 CodeOffsets::frame_never_safe, 0 /* no frame size */,
785 /* oop maps = */ nullptr, /* caller must gc arguments = */ false),
786 _receiver(receiver),
787 _frame_data_offset(frame_data_offset)
788 {
789 CodeCache::commit(this);
790 }
791
792 void* UpcallStub::operator new(size_t s, unsigned size) throw() {
793 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
794 }
795
796 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
797 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
798
799 UpcallStub* blob = nullptr;
800 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
801 {
802 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
803 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
804 }
805 if (blob == nullptr) {
806 return nullptr; // caller must handle this
807 }
808
809 // Track memory usage statistic after releasing CodeCache_lock
810 MemoryService::track_code_cache_memory_usage();
811
812 trace_new_stub(blob, "UpcallStub - ", name);
813
814 return blob;
815 }
816
817 void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
818 frame_data_for_frame(frame)->old_handles->oops_do(f);
819 }
820
821 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
822 return &frame_data_for_frame(frame)->jfa;
823 }
824
825 void UpcallStub::free(UpcallStub* blob) {
826 assert(blob != nullptr, "caller must check for nullptr");
827 JNIHandles::destroy_global(blob->receiver());
828 RuntimeBlob::free(blob);
829 }
830
831 //----------------------------------------------------------------------------------------------------
832 // Verification and printing
833
834 void CodeBlob::verify() {
835 if (is_nmethod()) {
836 as_nmethod()->verify();
837 }
838 }
839
840 void CodeBlob::print_on(outputStream* st) const {
841 vptr()->print_on(this, st);
842 }
843
844 void CodeBlob::print() const { print_on(tty); }
845
846 void CodeBlob::print_value_on(outputStream* st) const {
847 vptr()->print_value_on(this, st);
848 }
849
850 void CodeBlob::print_on_impl(outputStream* st) const {
851 st->print_cr("[CodeBlob kind:%d (" INTPTR_FORMAT ")]", (int)_kind, p2i(this));
852 st->print_cr("Framesize: %d", _frame_size);
853 }
854
855 void CodeBlob::print_value_on_impl(outputStream* st) const {
856 st->print_cr("[CodeBlob]");
857 }
858
859 void CodeBlob::print_block_comment(outputStream* stream, address block_begin) const {
860 #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
861 if (is_nmethod()) {
862 as_nmethod()->print_nmethod_labels(stream, block_begin);
863 }
864 #endif
865
866 #ifndef PRODUCT
867 ptrdiff_t offset = block_begin - code_begin();
868 assert(offset >= 0, "Expecting non-negative offset!");
869 _asm_remarks.print(uint(offset), stream);
870 #endif
871 }
872
873 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
874 if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) {
875 // the interpreter is generated into a buffer blob
876 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
877 if (i != nullptr) {
878 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
879 i->print_on(st);
880 return;
881 }
882 if (Interpreter::contains(addr)) {
883 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
884 " (not bytecode specific)", p2i(addr));
885 return;
886 }
887 //
888 if (AdapterHandlerLibrary::contains(this)) {
889 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
890 AdapterHandlerLibrary::print_handler_on(st, this);
891 }
892 // the stubroutines are generated into a buffer blob
893 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
894 if (d != nullptr) {
895 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
896 d->print_on(st);
897 st->cr();
898 return;
899 }
900 if (StubRoutines::contains(addr)) {
901 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
902 return;
903 }
904 VtableStub* v = VtableStubs::stub_containing(addr);
905 if (v != nullptr) {
906 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
907 v->print_on(st);
908 st->cr();
909 return;
910 }
911 }
912 if (is_nmethod()) {
913 nmethod* nm = (nmethod*)this;
914 ResourceMark rm;
915 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
916 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
917 if (verbose) {
918 st->print(" for ");
919 nm->method()->print_value_on(st);
920 }
921 st->cr();
922 if (verbose && st == tty) {
923 // verbose is only ever true when called from findpc in debug.cpp
924 nm->print_nmethod(true);
925 } else {
926 nm->print_on(st);
927 }
928 return;
929 }
930 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
931 print_on(st);
932 }
933
934 void BufferBlob::print_on_impl(outputStream* st) const {
935 RuntimeBlob::print_on_impl(st);
936 print_value_on_impl(st);
937 }
938
939 void BufferBlob::print_value_on_impl(outputStream* st) const {
940 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
941 }
942
943 void RuntimeStub::print_on_impl(outputStream* st) const {
944 ttyLocker ttyl;
945 RuntimeBlob::print_on_impl(st);
946 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
947 st->print_cr("%s", name());
948 Disassembler::decode((RuntimeBlob*)this, st);
949 }
950
951 void RuntimeStub::print_value_on_impl(outputStream* st) const {
952 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
953 }
954
955 void SingletonBlob::print_on_impl(outputStream* st) const {
956 ttyLocker ttyl;
957 RuntimeBlob::print_on_impl(st);
958 st->print_cr("%s", name());
959 Disassembler::decode((RuntimeBlob*)this, st);
960 }
961
962 void SingletonBlob::print_value_on_impl(outputStream* st) const {
963 st->print_cr("%s", name());
964 }
965
966 void DeoptimizationBlob::print_value_on_impl(outputStream* st) const {
967 st->print_cr("Deoptimization (frame not available)");
968 }
969
970 void UpcallStub::print_on_impl(outputStream* st) const {
971 RuntimeBlob::print_on_impl(st);
972 print_value_on_impl(st);
973 st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
974 oop recv = JNIHandles::resolve(_receiver);
975 st->print("Receiver MH=");
976 recv->print_on(st);
977 Disassembler::decode((RuntimeBlob*)this, st);
978 }
979
980 void UpcallStub::print_value_on_impl(outputStream* st) const {
981 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
982 }