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<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 void CodeBlob::restore_mutable_data(address reloc_data) {
193 // Relocation data is now stored as part of the mutable data area; allocate it before copy relocations
194 if (_mutable_data_size > 0) {
195 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
196 if (_mutable_data == nullptr) {
197 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
198 }
199 } else {
200 _mutable_data = blob_end(); // default value
201 }
202 if (_relocation_size > 0) {
203 assert(_mutable_data_size > 0, "relocation is part of mutable data section");
204 memcpy((address)relocation_begin(), reloc_data, relocation_size());
205 }
206 }
207
208 void CodeBlob::purge() {
209 assert(_mutable_data != nullptr, "should never be null");
210 if (_mutable_data != blob_end()) {
211 os::free(_mutable_data);
212 _mutable_data = blob_end(); // Valid not null address
213 }
214 if (_oop_maps != nullptr && !AOTCodeCache::is_address_in_aot_cache((address)_oop_maps)) {
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_ref();
248 dbg_strings().clear_ref();
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
305 assert(blob != nullptr, "sanity check");
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)
415 : RuntimeBlob(name, kind, cb, size, sizeof(BufferBlob), 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);
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
444 //----------------------------------------------------------------------------------------------------
445 // Implementation of AdapterBlob
446
447 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :
448 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size) {
449 CodeCache::commit(this);
450 }
451
452 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
453 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
454
455 CodeCache::gc_on_allocation();
456
457 AdapterBlob* blob = nullptr;
458 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
459 {
460 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
461 blob = new (size) AdapterBlob(size, cb);
462 }
463 // Track memory usage statistic after releasing CodeCache_lock
464 MemoryService::track_code_cache_memory_usage();
465
466 return blob;
467 }
468
469 //----------------------------------------------------------------------------------------------------
470 // Implementation of VtableBlob
471
472 void* VtableBlob::operator new(size_t s, unsigned size) throw() {
473 // Handling of allocation failure stops compilation and prints a bunch of
474 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
475 // can be locked, and then re-locking the CodeCache_lock. That is not safe in
476 // this context as we hold the CompiledICLocker. So we just don't handle code
477 // cache exhaustion here; we leave that for a later allocation that does not
478 // hold the CompiledICLocker.
479 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
480 }
481
482 VtableBlob::VtableBlob(const char* name, int size) :
483 BufferBlob(name, CodeBlobKind::Vtable, size) {
484 }
485
486 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
487 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
488
489 VtableBlob* blob = nullptr;
490 unsigned int size = sizeof(VtableBlob);
491 // align the size to CodeEntryAlignment
492 size = align_code_offset(size);
493 size += align_up(buffer_size, oopSize);
494 assert(name != nullptr, "must provide a name");
495 {
496 if (!CodeCache_lock->try_lock()) {
497 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
498 // IC transition to megamorphic, for which this stub will be needed. It is better to
499 // bail out the transition, and wait for a more opportune moment. Not only is it not
500 // worth waiting for the lock blockingly for the megamorphic transition, it might
501 // also result in a deadlock to blockingly wait, when concurrent class unloading is
502 // performed. At this point in time, the CompiledICLocker is taken, so we are not
503 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
504 // consistently taken in the opposite order. Bailing out results in an IC transition to
505 // the clean state instead, which will cause subsequent calls to retry the transitioning
506 // eventually.
507 return nullptr;
508 }
509 blob = new (size) VtableBlob(name, size);
510 CodeCache_lock->unlock();
511 }
512 // Track memory usage statistic after releasing CodeCache_lock
513 MemoryService::track_code_cache_memory_usage();
514
515 return blob;
516 }
517
518 //----------------------------------------------------------------------------------------------------
519 // Implementation of MethodHandlesAdapterBlob
520
521 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
522 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
523
524 MethodHandlesAdapterBlob* blob = nullptr;
525 unsigned int size = sizeof(MethodHandlesAdapterBlob);
526 // align the size to CodeEntryAlignment
527 size = CodeBlob::align_code_offset(size);
528 size += align_up(buffer_size, oopSize);
529 {
530 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
531 blob = new (size) MethodHandlesAdapterBlob(size);
532 if (blob == nullptr) {
533 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
534 }
535 }
536 // Track memory usage statistic after releasing CodeCache_lock
537 MemoryService::track_code_cache_memory_usage();
538
539 return blob;
540 }
541
542 //----------------------------------------------------------------------------------------------------
543 // Implementation of RuntimeStub
544
545 RuntimeStub::RuntimeStub(
546 const char* name,
547 CodeBuffer* cb,
548 int size,
549 int16_t frame_complete,
550 int frame_size,
551 OopMapSet* oop_maps,
552 bool caller_must_gc_arguments
553 )
554 : RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub),
555 frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
556 {
557 }
558
559 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
560 CodeBuffer* cb,
561 int16_t frame_complete,
562 int frame_size,
563 OopMapSet* oop_maps,
564 bool caller_must_gc_arguments,
565 bool alloc_fail_is_fatal)
566 {
567 RuntimeStub* stub = nullptr;
568 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
569 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
570 {
571 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
572 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
573 if (stub == nullptr) {
574 if (!alloc_fail_is_fatal) {
575 return nullptr;
576 }
577 fatal("Initial size of CodeCache is too small");
578 }
579 }
580
581 trace_new_stub(stub, "RuntimeStub - ", stub_name);
582
583 return stub;
584 }
585
586
587 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
588 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
589 }
590
591 // operator new shared by all singletons:
592 void* SingletonBlob::operator new(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() {
593 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
594 if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small");
595 return p;
596 }
597
598
599 //----------------------------------------------------------------------------------------------------
600 // Implementation of DeoptimizationBlob
601
602 DeoptimizationBlob::DeoptimizationBlob(
603 CodeBuffer* cb,
604 int size,
605 OopMapSet* oop_maps,
606 int unpack_offset,
607 int unpack_with_exception_offset,
608 int unpack_with_reexecution_offset,
609 int frame_size
610 )
611 : SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
612 size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
613 {
614 _unpack_offset = unpack_offset;
615 _unpack_with_exception = unpack_with_exception_offset;
616 _unpack_with_reexecution = unpack_with_reexecution_offset;
617 #ifdef COMPILER1
618 _unpack_with_exception_in_tls = -1;
619 #endif
620 }
621
622
623 DeoptimizationBlob* DeoptimizationBlob::create(
624 CodeBuffer* cb,
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 DeoptimizationBlob* blob = nullptr;
632 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
633 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
634 {
635 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
636 blob = new (size) DeoptimizationBlob(cb,
637 size,
638 oop_maps,
639 unpack_offset,
640 unpack_with_exception_offset,
641 unpack_with_reexecution_offset,
642 frame_size);
643 }
644
645 trace_new_stub(blob, "DeoptimizationBlob");
646
647 return blob;
648 }
649
650 #ifdef COMPILER2
651
652 //----------------------------------------------------------------------------------------------------
653 // Implementation of UncommonTrapBlob
654
655 UncommonTrapBlob::UncommonTrapBlob(
656 CodeBuffer* cb,
657 int size,
658 OopMapSet* oop_maps,
659 int frame_size
660 )
661 : SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb,
662 size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
663 {}
664
665
666 UncommonTrapBlob* UncommonTrapBlob::create(
667 CodeBuffer* cb,
668 OopMapSet* oop_maps,
669 int frame_size)
670 {
671 UncommonTrapBlob* blob = nullptr;
672 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
673 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
674 {
675 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
676 blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size);
677 }
678
679 trace_new_stub(blob, "UncommonTrapBlob");
680
681 return blob;
682 }
683
684 //----------------------------------------------------------------------------------------------------
685 // Implementation of ExceptionBlob
686
687 ExceptionBlob::ExceptionBlob(
688 CodeBuffer* cb,
689 int size,
690 OopMapSet* oop_maps,
691 int frame_size
692 )
693 : SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
694 size, sizeof(ExceptionBlob), frame_size, oop_maps)
695 {}
696
697
698 ExceptionBlob* ExceptionBlob::create(
699 CodeBuffer* cb,
700 OopMapSet* oop_maps,
701 int frame_size)
702 {
703 ExceptionBlob* blob = nullptr;
704 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
705 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
706 {
707 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
708 blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size);
709 }
710
711 trace_new_stub(blob, "ExceptionBlob");
712
713 return blob;
714 }
715
716 #endif // COMPILER2
717
718 //----------------------------------------------------------------------------------------------------
719 // Implementation of SafepointBlob
720
721 SafepointBlob::SafepointBlob(
722 CodeBuffer* cb,
723 int size,
724 OopMapSet* oop_maps,
725 int frame_size
726 )
727 : SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb,
728 size, sizeof(SafepointBlob), frame_size, oop_maps)
729 {}
730
731
732 SafepointBlob* SafepointBlob::create(
733 CodeBuffer* cb,
734 OopMapSet* oop_maps,
735 int frame_size)
736 {
737 SafepointBlob* blob = nullptr;
738 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
739 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
740 {
741 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
742 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
743 }
744
745 trace_new_stub(blob, "SafepointBlob");
746
747 return blob;
748 }
749
750 //----------------------------------------------------------------------------------------------------
751 // Implementation of UpcallStub
752
753 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
754 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
755 CodeOffsets::frame_never_safe, 0 /* no frame size */,
756 /* oop maps = */ nullptr, /* caller must gc arguments = */ false),
757 _receiver(receiver),
758 _frame_data_offset(frame_data_offset)
759 {
760 CodeCache::commit(this);
761 }
762
763 void* UpcallStub::operator new(size_t s, unsigned size) throw() {
764 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
765 }
766
767 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
768 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
769
770 UpcallStub* blob = nullptr;
771 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
772 {
773 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
774 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
775 }
776 if (blob == nullptr) {
777 return nullptr; // caller must handle this
778 }
779
780 // Track memory usage statistic after releasing CodeCache_lock
781 MemoryService::track_code_cache_memory_usage();
782
783 trace_new_stub(blob, "UpcallStub - ", name);
784
785 return blob;
786 }
787
788 void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
789 frame_data_for_frame(frame)->old_handles->oops_do(f);
790 }
791
792 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
793 return &frame_data_for_frame(frame)->jfa;
794 }
795
796 void UpcallStub::free(UpcallStub* blob) {
797 assert(blob != nullptr, "caller must check for nullptr");
798 JNIHandles::destroy_global(blob->receiver());
799 RuntimeBlob::free(blob);
800 }
801
802 //----------------------------------------------------------------------------------------------------
803 // Verification and printing
804
805 void CodeBlob::verify() {
806 if (is_nmethod()) {
807 as_nmethod()->verify();
808 }
809 }
810
811 void CodeBlob::print_on(outputStream* st) const {
812 vptr()->print_on(this, st);
813 }
814
815 void CodeBlob::print() const { print_on(tty); }
816
817 void CodeBlob::print_value_on(outputStream* st) const {
818 vptr()->print_value_on(this, st);
819 }
820
821 void CodeBlob::print_on_impl(outputStream* st) const {
822 st->print_cr("[CodeBlob kind:%d (" INTPTR_FORMAT ")]", (int)_kind, p2i(this));
823 st->print_cr("Framesize: %d", _frame_size);
824 }
825
826 void CodeBlob::print_value_on_impl(outputStream* st) const {
827 st->print_cr("[CodeBlob]");
828 }
829
830 void CodeBlob::print_block_comment(outputStream* stream, address block_begin) const {
831 #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
832 if (is_nmethod()) {
833 as_nmethod()->print_nmethod_labels(stream, block_begin);
834 }
835 #endif
836
837 #ifndef PRODUCT
838 ptrdiff_t offset = block_begin - code_begin();
839 assert(offset >= 0, "Expecting non-negative offset!");
840 _asm_remarks.print(uint(offset), stream);
841 #endif
842 }
843
844 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
845 if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) {
846 // the interpreter is generated into a buffer blob
847 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
848 if (i != nullptr) {
849 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
850 i->print_on(st);
851 return;
852 }
853 if (Interpreter::contains(addr)) {
854 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
855 " (not bytecode specific)", p2i(addr));
856 return;
857 }
858 //
859 if (AdapterHandlerLibrary::contains(this)) {
860 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
861 AdapterHandlerLibrary::print_handler_on(st, this);
862 }
863 // the stubroutines are generated into a buffer blob
864 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
865 if (d != nullptr) {
866 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
867 d->print_on(st);
868 st->cr();
869 return;
870 }
871 if (StubRoutines::contains(addr)) {
872 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
873 return;
874 }
875 VtableStub* v = VtableStubs::stub_containing(addr);
876 if (v != nullptr) {
877 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
878 v->print_on(st);
879 st->cr();
880 return;
881 }
882 }
883 if (is_nmethod()) {
884 nmethod* nm = (nmethod*)this;
885 ResourceMark rm;
886 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
887 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
888 if (verbose) {
889 st->print(" for ");
890 nm->method()->print_value_on(st);
891 }
892 st->cr();
893 if (verbose && st == tty) {
894 // verbose is only ever true when called from findpc in debug.cpp
895 nm->print_nmethod(true);
896 } else {
897 nm->print_on(st);
898 }
899 return;
900 }
901 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
902 print_on(st);
903 }
904
905 void BufferBlob::print_on_impl(outputStream* st) const {
906 RuntimeBlob::print_on_impl(st);
907 print_value_on_impl(st);
908 }
909
910 void BufferBlob::print_value_on_impl(outputStream* st) const {
911 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
912 }
913
914 void RuntimeStub::print_on_impl(outputStream* st) const {
915 ttyLocker ttyl;
916 RuntimeBlob::print_on_impl(st);
917 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
918 st->print_cr("%s", name());
919 Disassembler::decode((RuntimeBlob*)this, st);
920 }
921
922 void RuntimeStub::print_value_on_impl(outputStream* st) const {
923 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
924 }
925
926 void SingletonBlob::print_on_impl(outputStream* st) const {
927 ttyLocker ttyl;
928 RuntimeBlob::print_on_impl(st);
929 st->print_cr("%s", name());
930 Disassembler::decode((RuntimeBlob*)this, st);
931 }
932
933 void SingletonBlob::print_value_on_impl(outputStream* st) const {
934 st->print_cr("%s", name());
935 }
936
937 void DeoptimizationBlob::print_value_on_impl(outputStream* st) const {
938 st->print_cr("Deoptimization (frame not available)");
939 }
940
941 void UpcallStub::print_on_impl(outputStream* st) const {
942 RuntimeBlob::print_on_impl(st);
943 print_value_on_impl(st);
944 st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
945 oop recv = JNIHandles::resolve(_receiver);
946 st->print("Receiver MH=");
947 recv->print_on(st);
948 Disassembler::decode((RuntimeBlob*)this, st);
949 }
950
951 void UpcallStub::print_value_on_impl(outputStream* st) const {
952 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
953 }