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