1 /*
2 * Copyright (c) 1998, 2024, 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 "precompiled.hpp"
26 #include "code/codeBlob.hpp"
27 #include "code/codeCache.hpp"
28 #include "code/relocInfo.hpp"
29 #include "code/vtableStubs.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "compiler/oopMap.hpp"
32 #include "interpreter/bytecode.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvm.h"
35 #include "memory/allocation.inline.hpp"
36 #include "memory/heap.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/forte.hpp"
40 #include "prims/jvmtiExport.hpp"
41 #include "runtime/handles.inline.hpp"
42 #include "runtime/interfaceSupport.inline.hpp"
43 #include "runtime/javaFrameAnchor.hpp"
44 #include "runtime/jniHandles.inline.hpp"
45 #include "runtime/mutexLocker.hpp"
46 #include "runtime/safepoint.hpp"
47 #include "runtime/sharedRuntime.hpp"
48 #include "runtime/stubCodeGenerator.hpp"
49 #include "runtime/stubRoutines.hpp"
50 #include "runtime/vframe.hpp"
51 #include "services/memoryService.hpp"
52 #include "utilities/align.hpp"
53 #ifdef COMPILER1
54 #include "c1/c1_Runtime1.hpp"
55 #endif
56
57
58 unsigned int CodeBlob::align_code_offset(int offset) {
59 // align the size to CodeEntryAlignment
60 int header_size = (int)CodeHeap::header_size();
61 return align_up(offset + header_size, CodeEntryAlignment) - header_size;
62 }
63
64 // This must be consistent with the CodeBlob constructor's layout actions.
65 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
66 unsigned int size = header_size;
67 size += align_up(cb->total_relocation_size(), oopSize);
68 // align the size to CodeEntryAlignment
69 size = align_code_offset(size);
70 size += align_up(cb->total_content_size(), oopSize);
71 size += align_up(cb->total_oop_size(), oopSize);
72 size += align_up(cb->total_metadata_size(), oopSize);
73 return size;
74 }
75
76 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
77 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) :
78 _oop_maps(nullptr), // will be set by set_oop_maps() call
79 _name(name),
80 _size(size),
81 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
82 _content_offset(CodeBlob::align_code_offset(header_size + _relocation_size)),
83 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
84 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)),
85 _frame_size(frame_size),
86 S390_ONLY(_ctable_offset(0) COMMA)
87 _header_size(header_size),
88 _frame_complete_offset(frame_complete_offset),
89 _kind(kind),
90 _caller_must_gc_arguments(caller_must_gc_arguments)
91 {
92 assert(is_aligned(_size, oopSize), "unaligned size");
93 assert(is_aligned(header_size, oopSize), "unaligned size");
94 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
95 assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size);
96 assert(code_end() == content_end(), "must be the same - see code_end()");
97 #ifdef COMPILER1
98 // probably wrong for tiered
99 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
100 #endif // COMPILER1
101
102 set_oop_maps(oop_maps);
103 }
104
105 // Simple CodeBlob used for simple BufferBlob.
106 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) :
107 _oop_maps(nullptr),
108 _name(name),
109 _size(size),
110 _relocation_size(0),
111 _content_offset(CodeBlob::align_code_offset(header_size)),
112 _code_offset(_content_offset),
113 _data_offset(size),
114 _frame_size(0),
115 S390_ONLY(_ctable_offset(0) COMMA)
116 _header_size(header_size),
117 _frame_complete_offset(CodeOffsets::frame_never_safe),
118 _kind(kind),
119 _caller_must_gc_arguments(false)
120 {
121 assert(is_aligned(size, oopSize), "unaligned size");
122 assert(is_aligned(header_size, oopSize), "unaligned size");
123 }
124
125 void CodeBlob::purge() {
126 if (_oop_maps != nullptr) {
127 delete _oop_maps;
128 _oop_maps = nullptr;
129 }
130 NOT_PRODUCT(_asm_remarks.clear());
131 NOT_PRODUCT(_dbg_strings.clear());
132 }
133
134 void CodeBlob::set_oop_maps(OopMapSet* p) {
135 // Danger Will Robinson! This method allocates a big
136 // chunk of memory, its your job to free it.
137 if (p != nullptr) {
138 _oop_maps = ImmutableOopMapSet::build_from(p);
139 } else {
140 _oop_maps = nullptr;
141 }
142 }
143
144 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
145 assert(_oop_maps != nullptr, "nope");
146 return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
147 }
148
149 void CodeBlob::print_code_on(outputStream* st) {
150 ResourceMark m;
151 Disassembler::decode(this, st);
152 }
153
154 //-----------------------------------------------------------------------------------------
155 // Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info.
156
157 RuntimeBlob::RuntimeBlob(
158 const char* name,
159 CodeBlobKind kind,
160 CodeBuffer* cb,
161 int size,
162 uint16_t header_size,
163 int16_t frame_complete,
164 int frame_size,
165 OopMapSet* oop_maps,
166 bool caller_must_gc_arguments)
167 : CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
168 {
169 cb->copy_code_and_locs_to(this);
170 }
171
172 void RuntimeBlob::free(RuntimeBlob* blob) {
173 assert(blob != nullptr, "caller must check for nullptr");
174 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
175 blob->purge();
176 {
177 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
178 CodeCache::free(blob);
179 }
180 // Track memory usage statistic after releasing CodeCache_lock
181 MemoryService::track_code_cache_memory_usage();
182 }
183
184 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
185 // Do not hold the CodeCache lock during name formatting.
186 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
187
188 if (stub != nullptr && (PrintStubCode ||
189 Forte::is_enabled() ||
190 JvmtiExport::should_post_dynamic_code_generated())) {
191 char stub_id[256];
192 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
193 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
194 if (PrintStubCode) {
195 ttyLocker ttyl;
196 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
197 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
198 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
199 Disassembler::decode(stub->code_begin(), stub->code_end(), tty
200 NOT_PRODUCT(COMMA &stub->asm_remarks()));
201 if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
202 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
203 stub->oop_maps()->print();
204 }
205 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
206 tty->cr();
207 }
208 if (Forte::is_enabled()) {
209 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
210 }
211
212 if (JvmtiExport::should_post_dynamic_code_generated()) {
213 const char* stub_name = name2;
214 if (name2[0] == '\0') stub_name = name1;
215 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
216 }
217 }
218
219 // Track memory usage statistic after releasing CodeCache_lock
220 MemoryService::track_code_cache_memory_usage();
221 }
222
223 //----------------------------------------------------------------------------------------------------
224 // Implementation of BufferBlob
225
226 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, int size)
227 : RuntimeBlob(name, kind, size, sizeof(BufferBlob))
228 {}
229
230 BufferBlob* BufferBlob::create(const char* name, uint buffer_size) {
231 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
232
233 BufferBlob* blob = nullptr;
234 unsigned int size = sizeof(BufferBlob);
235 // align the size to CodeEntryAlignment
236 size = CodeBlob::align_code_offset(size);
237 size += align_up(buffer_size, oopSize);
238 assert(name != nullptr, "must provide a name");
239 {
240 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
241 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size);
242 }
243 // Track memory usage statistic after releasing CodeCache_lock
244 MemoryService::track_code_cache_memory_usage();
245
246 return blob;
247 }
248
249
250 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, int header_size)
251 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, 0, nullptr)
252 {}
253
254 // Used by gtest
255 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
256 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
257
258 BufferBlob* blob = nullptr;
259 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
260 assert(name != nullptr, "must provide a name");
261 {
262 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
263 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size, sizeof(BufferBlob));
264 }
265 // Track memory usage statistic after releasing CodeCache_lock
266 MemoryService::track_code_cache_memory_usage();
267
268 return blob;
269 }
270
271 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
272 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
273 }
274
275 void BufferBlob::free(BufferBlob *blob) {
276 RuntimeBlob::free(blob);
277 }
278
279 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments)
280 : RuntimeBlob(name, kind, cb, size, sizeof(BufferBlob), frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
281 {}
282
283
284 //----------------------------------------------------------------------------------------------------
285 // Implementation of AdapterBlob
286
287 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) :
288 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments) {
289 CodeCache::commit(this);
290 }
291
292 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) {
293 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
294
295 CodeCache::gc_on_allocation();
296
297 AdapterBlob* blob = nullptr;
298 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
299 {
300 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
301 blob = new (size) AdapterBlob(size, cb, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
302 }
303 // Track memory usage statistic after releasing CodeCache_lock
304 MemoryService::track_code_cache_memory_usage();
305
306 return blob;
307 }
308
309 //----------------------------------------------------------------------------------------------------
310 // Implementation of VtableBlob
311
312 void* VtableBlob::operator new(size_t s, unsigned size) throw() {
313 // Handling of allocation failure stops compilation and prints a bunch of
314 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
315 // can be locked, and then re-locking the CodeCache_lock. That is not safe in
316 // this context as we hold the CompiledICLocker. So we just don't handle code
317 // cache exhaustion here; we leave that for a later allocation that does not
318 // hold the CompiledICLocker.
319 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
320 }
321
322 VtableBlob::VtableBlob(const char* name, int size) :
323 BufferBlob(name, CodeBlobKind::Vtable, size) {
324 }
325
326 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
327 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
328
329 VtableBlob* blob = nullptr;
330 unsigned int size = sizeof(VtableBlob);
331 // align the size to CodeEntryAlignment
332 size = align_code_offset(size);
333 size += align_up(buffer_size, oopSize);
334 assert(name != nullptr, "must provide a name");
335 {
336 if (!CodeCache_lock->try_lock()) {
337 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
338 // IC transition to megamorphic, for which this stub will be needed. It is better to
339 // bail out the transition, and wait for a more opportune moment. Not only is it not
340 // worth waiting for the lock blockingly for the megamorphic transition, it might
341 // also result in a deadlock to blockingly wait, when concurrent class unloading is
342 // performed. At this point in time, the CompiledICLocker is taken, so we are not
343 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
344 // consistently taken in the opposite order. Bailing out results in an IC transition to
345 // the clean state instead, which will cause subsequent calls to retry the transitioning
346 // eventually.
347 return nullptr;
348 }
349 blob = new (size) VtableBlob(name, size);
350 CodeCache_lock->unlock();
351 }
352 // Track memory usage statistic after releasing CodeCache_lock
353 MemoryService::track_code_cache_memory_usage();
354
355 return blob;
356 }
357
358 //----------------------------------------------------------------------------------------------------
359 // Implementation of MethodHandlesAdapterBlob
360
361 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
362 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
363
364 MethodHandlesAdapterBlob* blob = nullptr;
365 unsigned int size = sizeof(MethodHandlesAdapterBlob);
366 // align the size to CodeEntryAlignment
367 size = CodeBlob::align_code_offset(size);
368 size += align_up(buffer_size, oopSize);
369 {
370 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
371 blob = new (size) MethodHandlesAdapterBlob(size);
372 if (blob == nullptr) {
373 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
374 }
375 }
376 // Track memory usage statistic after releasing CodeCache_lock
377 MemoryService::track_code_cache_memory_usage();
378
379 return blob;
380 }
381
382 //----------------------------------------------------------------------------------------------------
383 // Implementation of BufferedInlineTypeBlob
384 BufferedInlineTypeBlob::BufferedInlineTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off) :
385 BufferBlob("buffered inline type", CodeBlobKind::BufferedInlineType, cb, size, sizeof(BufferedInlineTypeBlob)),
386 _pack_fields_off(pack_fields_off),
387 _pack_fields_jobject_off(pack_fields_jobject_off),
388 _unpack_fields_off(unpack_fields_off) {
389 CodeCache::commit(this);
390 }
391
392 BufferedInlineTypeBlob* BufferedInlineTypeBlob::create(CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off) {
393 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
394
395 BufferedInlineTypeBlob* blob = nullptr;
396 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferedInlineTypeBlob));
397 {
398 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
399 blob = new (size) BufferedInlineTypeBlob(size, cb, pack_fields_off, pack_fields_jobject_off, unpack_fields_off);
400 }
401 // Track memory usage statistic after releasing CodeCache_lock
402 MemoryService::track_code_cache_memory_usage();
403
404 return blob;
405 }
406
407 //----------------------------------------------------------------------------------------------------
408 // Implementation of RuntimeStub
409
410 RuntimeStub::RuntimeStub(
411 const char* name,
412 CodeBuffer* cb,
413 int size,
414 int16_t frame_complete,
415 int frame_size,
416 OopMapSet* oop_maps,
417 bool caller_must_gc_arguments
418 )
419 : RuntimeBlob(name, CodeBlobKind::Runtime_Stub, cb, size, sizeof(RuntimeStub),
420 frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
421 {
422 }
423
424 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
425 CodeBuffer* cb,
426 int16_t frame_complete,
427 int frame_size,
428 OopMapSet* oop_maps,
429 bool caller_must_gc_arguments,
430 bool alloc_fail_is_fatal)
431 {
432 RuntimeStub* stub = nullptr;
433 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
434 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
435 {
436 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
437 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
438 if (stub == nullptr) {
439 if (!alloc_fail_is_fatal) {
440 return nullptr;
441 }
442 fatal("Initial size of CodeCache is too small");
443 }
444 }
445
446 trace_new_stub(stub, "RuntimeStub - ", stub_name);
447
448 return stub;
449 }
450
451
452 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
453 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
454 }
455
456 // operator new shared by all singletons:
457 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
458 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
459 if (!p) fatal("Initial size of CodeCache is too small");
460 return p;
461 }
462
463
464 //----------------------------------------------------------------------------------------------------
465 // Implementation of DeoptimizationBlob
466
467 DeoptimizationBlob::DeoptimizationBlob(
468 CodeBuffer* cb,
469 int size,
470 OopMapSet* oop_maps,
471 int unpack_offset,
472 int unpack_with_exception_offset,
473 int unpack_with_reexecution_offset,
474 int frame_size
475 )
476 : SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
477 size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
478 {
479 _unpack_offset = unpack_offset;
480 _unpack_with_exception = unpack_with_exception_offset;
481 _unpack_with_reexecution = unpack_with_reexecution_offset;
482 #ifdef COMPILER1
483 _unpack_with_exception_in_tls = -1;
484 #endif
485 }
486
487
488 DeoptimizationBlob* DeoptimizationBlob::create(
489 CodeBuffer* cb,
490 OopMapSet* oop_maps,
491 int unpack_offset,
492 int unpack_with_exception_offset,
493 int unpack_with_reexecution_offset,
494 int frame_size)
495 {
496 DeoptimizationBlob* blob = nullptr;
497 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
498 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
499 {
500 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
501 blob = new (size) DeoptimizationBlob(cb,
502 size,
503 oop_maps,
504 unpack_offset,
505 unpack_with_exception_offset,
506 unpack_with_reexecution_offset,
507 frame_size);
508 }
509
510 trace_new_stub(blob, "DeoptimizationBlob");
511
512 return blob;
513 }
514
515
516 //----------------------------------------------------------------------------------------------------
517 // Implementation of UncommonTrapBlob
518
519 #ifdef COMPILER2
520 UncommonTrapBlob::UncommonTrapBlob(
521 CodeBuffer* cb,
522 int size,
523 OopMapSet* oop_maps,
524 int frame_size
525 )
526 : SingletonBlob("UncommonTrapBlob", CodeBlobKind::Uncommon_Trap, cb,
527 size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
528 {}
529
530
531 UncommonTrapBlob* UncommonTrapBlob::create(
532 CodeBuffer* cb,
533 OopMapSet* oop_maps,
534 int frame_size)
535 {
536 UncommonTrapBlob* blob = nullptr;
537 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
538 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
539 {
540 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
541 blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
542 }
543
544 trace_new_stub(blob, "UncommonTrapBlob");
545
546 return blob;
547 }
548
549
550 #endif // COMPILER2
551
552
553 //----------------------------------------------------------------------------------------------------
554 // Implementation of ExceptionBlob
555
556 #ifdef COMPILER2
557 ExceptionBlob::ExceptionBlob(
558 CodeBuffer* cb,
559 int size,
560 OopMapSet* oop_maps,
561 int frame_size
562 )
563 : SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
564 size, sizeof(ExceptionBlob), frame_size, oop_maps)
565 {}
566
567
568 ExceptionBlob* ExceptionBlob::create(
569 CodeBuffer* cb,
570 OopMapSet* oop_maps,
571 int frame_size)
572 {
573 ExceptionBlob* blob = nullptr;
574 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
575 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
576 {
577 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
578 blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
579 }
580
581 trace_new_stub(blob, "ExceptionBlob");
582
583 return blob;
584 }
585
586
587 #endif // COMPILER2
588
589
590 //----------------------------------------------------------------------------------------------------
591 // Implementation of SafepointBlob
592
593 SafepointBlob::SafepointBlob(
594 CodeBuffer* cb,
595 int size,
596 OopMapSet* oop_maps,
597 int frame_size
598 )
599 : SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb,
600 size, sizeof(SafepointBlob), frame_size, oop_maps)
601 {}
602
603
604 SafepointBlob* SafepointBlob::create(
605 CodeBuffer* cb,
606 OopMapSet* oop_maps,
607 int frame_size)
608 {
609 SafepointBlob* blob = nullptr;
610 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
611 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
612 {
613 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
614 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
615 }
616
617 trace_new_stub(blob, "SafepointBlob");
618
619 return blob;
620 }
621
622 //----------------------------------------------------------------------------------------------------
623 // Implementation of UpcallStub
624
625 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
626 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
627 CodeOffsets::frame_never_safe, 0 /* no frame size */,
628 /* oop maps = */ nullptr, /* caller must gc arguments = */ false),
629 _receiver(receiver),
630 _frame_data_offset(frame_data_offset)
631 {
632 CodeCache::commit(this);
633 }
634
635 void* UpcallStub::operator new(size_t s, unsigned size) throw() {
636 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
637 }
638
639 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
640 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
641
642 UpcallStub* blob = nullptr;
643 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
644 {
645 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
646 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
647 }
648 if (blob == nullptr) {
649 return nullptr; // caller must handle this
650 }
651
652 // Track memory usage statistic after releasing CodeCache_lock
653 MemoryService::track_code_cache_memory_usage();
654
655 trace_new_stub(blob, "UpcallStub - ", name);
656
657 return blob;
658 }
659
660 void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
661 frame_data_for_frame(frame)->old_handles->oops_do(f);
662 }
663
664 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
665 return &frame_data_for_frame(frame)->jfa;
666 }
667
668 void UpcallStub::free(UpcallStub* blob) {
669 assert(blob != nullptr, "caller must check for nullptr");
670 JNIHandles::destroy_global(blob->receiver());
671 RuntimeBlob::free(blob);
672 }
673
674 //----------------------------------------------------------------------------------------------------
675 // Verification and printing
676
677 void CodeBlob::print_on(outputStream* st) const {
678 st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
679 st->print_cr("Framesize: %d", _frame_size);
680 }
681
682 void CodeBlob::print() const { print_on(tty); }
683
684 void CodeBlob::print_value_on(outputStream* st) const {
685 st->print_cr("[CodeBlob]");
686 }
687
688 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
689 if (is_buffer_blob()) {
690 // the interpreter is generated into a buffer blob
691 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
692 if (i != nullptr) {
693 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
694 i->print_on(st);
695 return;
696 }
697 if (Interpreter::contains(addr)) {
698 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
699 " (not bytecode specific)", p2i(addr));
700 return;
701 }
702 //
703 if (AdapterHandlerLibrary::contains(this)) {
704 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
705 AdapterHandlerLibrary::print_handler_on(st, this);
706 }
707 // the stubroutines are generated into a buffer blob
708 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
709 if (d != nullptr) {
710 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
711 d->print_on(st);
712 st->cr();
713 return;
714 }
715 if (StubRoutines::contains(addr)) {
716 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
717 return;
718 }
719 VtableStub* v = VtableStubs::stub_containing(addr);
720 if (v != nullptr) {
721 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
722 v->print_on(st);
723 st->cr();
724 return;
725 }
726 }
727 if (is_nmethod()) {
728 nmethod* nm = (nmethod*)this;
729 ResourceMark rm;
730 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
731 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
732 if (verbose) {
733 st->print(" for ");
734 nm->method()->print_value_on(st);
735 }
736 st->cr();
737 if (verbose && st == tty) {
738 // verbose is only ever true when called from findpc in debug.cpp
739 nm->print_nmethod(true);
740 } else {
741 nm->print(st);
742 }
743 return;
744 }
745 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
746 print_on(st);
747 }
748
749 void BufferBlob::verify() {
750 // unimplemented
751 }
752
753 void BufferBlob::print_on(outputStream* st) const {
754 RuntimeBlob::print_on(st);
755 print_value_on(st);
756 }
757
758 void BufferBlob::print_value_on(outputStream* st) const {
759 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
760 }
761
762 void RuntimeStub::verify() {
763 // unimplemented
764 }
765
766 void RuntimeStub::print_on(outputStream* st) const {
767 ttyLocker ttyl;
768 RuntimeBlob::print_on(st);
769 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
770 st->print_cr("%s", name());
771 Disassembler::decode((RuntimeBlob*)this, st);
772 }
773
774 void RuntimeStub::print_value_on(outputStream* st) const {
775 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
776 }
777
778 void SingletonBlob::verify() {
779 // unimplemented
780 }
781
782 void SingletonBlob::print_on(outputStream* st) const {
783 ttyLocker ttyl;
784 RuntimeBlob::print_on(st);
785 st->print_cr("%s", name());
786 Disassembler::decode((RuntimeBlob*)this, st);
787 }
788
789 void SingletonBlob::print_value_on(outputStream* st) const {
790 st->print_cr("%s", name());
791 }
792
793 void DeoptimizationBlob::print_value_on(outputStream* st) const {
794 st->print_cr("Deoptimization (frame not available)");
795 }
796
797 void UpcallStub::verify() {
798 // unimplemented
799 }
800
801 void UpcallStub::print_on(outputStream* st) const {
802 RuntimeBlob::print_on(st);
803 print_value_on(st);
804 st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
805 oop recv = JNIHandles::resolve(_receiver);
806 st->print("Receiver MH=");
807 recv->print_on(st);
808 Disassembler::decode((RuntimeBlob*)this, st);
809 }
810
811 void UpcallStub::print_value_on(outputStream* st) const {
812 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
813 }