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