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.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 const char* CodeBlob::compiler_name() const {
58 return compilertype2name(_type);
59 }
60
61 unsigned int CodeBlob::align_code_offset(int offset) {
62 // align the size to CodeEntryAlignment
63 int header_size = (int)CodeHeap::header_size();
64 return align_up(offset + header_size, CodeEntryAlignment) - header_size;
65 }
66
67
68 // This must be consistent with the CodeBlob constructor's layout actions.
69 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
70 unsigned int size = header_size;
71 size += align_up(cb->total_relocation_size(), oopSize);
72 // align the size to CodeEntryAlignment
73 size = align_code_offset(size);
74 size += align_up(cb->total_content_size(), oopSize);
75 size += align_up(cb->total_oop_size(), oopSize);
76 size += align_up(cb->total_metadata_size(), oopSize);
77 return size;
78 }
79
80 CodeBlob::CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, int frame_complete_offset, int frame_size, ImmutableOopMapSet* oop_maps, bool caller_must_gc_arguments, bool compiled) :
81 _code_begin(layout.code_begin()),
82 _code_end(layout.code_end()),
83 _content_begin(layout.content_begin()),
84 _data_end(layout.data_end()),
85 _relocation_begin(layout.relocation_begin()),
86 _relocation_end(layout.relocation_end()),
87 _oop_maps(oop_maps),
88 _name(name),
89 _size(layout.size()),
90 _header_size(layout.header_size()),
91 _frame_complete_offset(frame_complete_offset),
92 _data_offset(layout.data_offset()),
93 _frame_size(frame_size),
94 _caller_must_gc_arguments(caller_must_gc_arguments),
95 _is_compiled(compiled),
96 _type(type)
97 {
98 assert(is_aligned(layout.size(), oopSize), "unaligned size");
99 assert(is_aligned(layout.header_size(), oopSize), "unaligned size");
100 assert(is_aligned(layout.relocation_size(), oopSize), "unaligned size");
101 assert(layout.code_end() == layout.content_end(), "must be the same - see code_end()");
102 #ifdef COMPILER1
103 // probably wrong for tiered
104 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
105 #endif // COMPILER1
106 S390_ONLY(_ctable_offset = 0;) // avoid uninitialized fields
107 }
108
109 CodeBlob::CodeBlob(const char* name, CompilerType type, const CodeBlobLayout& layout, CodeBuffer* cb /*UNUSED*/, int frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments, bool compiled) :
110 _code_begin(layout.code_begin()),
111 _code_end(layout.code_end()),
112 _content_begin(layout.content_begin()),
113 _data_end(layout.data_end()),
114 _relocation_begin(layout.relocation_begin()),
115 _relocation_end(layout.relocation_end()),
116 _name(name),
117 _size(layout.size()),
118 _header_size(layout.header_size()),
119 _frame_complete_offset(frame_complete_offset),
120 _data_offset(layout.data_offset()),
121 _frame_size(frame_size),
122 _caller_must_gc_arguments(caller_must_gc_arguments),
123 _is_compiled(compiled),
124 _type(type)
125 {
126 assert(is_aligned(_size, oopSize), "unaligned size");
127 assert(is_aligned(_header_size, oopSize), "unaligned size");
128 assert(_data_offset <= _size, "codeBlob is too small");
129 assert(layout.code_end() == layout.content_end(), "must be the same - see code_end()");
130
131 set_oop_maps(oop_maps);
132 #ifdef COMPILER1
133 // probably wrong for tiered
134 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
135 #endif // COMPILER1
136 S390_ONLY(_ctable_offset = 0;) // avoid uninitialized fields
137 }
138
139
140 // Creates a simple CodeBlob. Sets up the size of the different regions.
141 RuntimeBlob::RuntimeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size)
142 : CodeBlob(name, compiler_none, CodeBlobLayout((address) this, size, header_size, locs_size, size), frame_complete, 0, nullptr, false /* caller_must_gc_arguments */)
143 {
144 assert(is_aligned(locs_size, oopSize), "unaligned size");
145 }
146
147
148 // Creates a RuntimeBlob from a CodeBuffer
149 // and copy code and relocation info.
150 RuntimeBlob::RuntimeBlob(
151 const char* name,
152 CodeBuffer* cb,
153 int header_size,
154 int size,
155 int frame_complete,
156 int frame_size,
157 OopMapSet* oop_maps,
158 bool caller_must_gc_arguments
159 ) : CodeBlob(name, compiler_none, CodeBlobLayout((address) this, size, header_size, cb), cb, frame_complete, frame_size, oop_maps, caller_must_gc_arguments) {
160 cb->copy_code_and_locs_to(this);
161 }
162
163 void RuntimeBlob::free(RuntimeBlob* blob) {
164 assert(blob != nullptr, "caller must check for nullptr");
165 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
166 blob->purge(true /* free_code_cache_data */, true /* unregister_nmethod */);
167 {
168 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
169 CodeCache::free(blob);
170 }
171 // Track memory usage statistic after releasing CodeCache_lock
172 MemoryService::track_code_cache_memory_usage();
173 }
174
175 void CodeBlob::purge(bool free_code_cache_data, bool unregister_nmethod) {
176 if (_oop_maps != nullptr) {
177 delete _oop_maps;
178 _oop_maps = nullptr;
179 }
180 NOT_PRODUCT(_asm_remarks.clear());
181 NOT_PRODUCT(_dbg_strings.clear());
182 }
183
184 void CodeBlob::set_oop_maps(OopMapSet* p) {
185 // Danger Will Robinson! This method allocates a big
186 // chunk of memory, its your job to free it.
187 if (p != nullptr) {
188 _oop_maps = ImmutableOopMapSet::build_from(p);
189 } else {
190 _oop_maps = nullptr;
191 }
192 }
193
194 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
195 // Do not hold the CodeCache lock during name formatting.
196 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
197
198 if (stub != nullptr && (PrintStubCode ||
199 Forte::is_enabled() ||
200 JvmtiExport::should_post_dynamic_code_generated())) {
201 char stub_id[256];
202 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
203 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
204 if (PrintStubCode) {
205 ttyLocker ttyl;
206 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
207 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
208 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
209 Disassembler::decode(stub->code_begin(), stub->code_end(), tty
210 NOT_PRODUCT(COMMA &stub->asm_remarks()));
211 if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
212 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
213 stub->oop_maps()->print();
214 }
215 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
216 tty->cr();
217 }
218 if (Forte::is_enabled()) {
219 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
220 }
221
222 if (JvmtiExport::should_post_dynamic_code_generated()) {
223 const char* stub_name = name2;
224 if (name2[0] == '\0') stub_name = name1;
225 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
226 }
227 }
228
229 // Track memory usage statistic after releasing CodeCache_lock
230 MemoryService::track_code_cache_memory_usage();
231 }
232
233 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
234 assert(_oop_maps != nullptr, "nope");
235 return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
236 }
237
238 void CodeBlob::print_code_on(outputStream* st) {
239 ResourceMark m;
240 Disassembler::decode(this, st);
241 }
242
243 //----------------------------------------------------------------------------------------------------
244 // Implementation of BufferBlob
245
246
247 BufferBlob::BufferBlob(const char* name, int size)
248 : RuntimeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)
249 {}
250
251 BufferBlob* BufferBlob::create(const char* name, uint buffer_size) {
252 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
253
254 BufferBlob* blob = nullptr;
255 unsigned int size = sizeof(BufferBlob);
256 // align the size to CodeEntryAlignment
257 size = CodeBlob::align_code_offset(size);
258 size += align_up(buffer_size, oopSize);
259 assert(name != nullptr, "must provide a name");
260 {
261 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
262 blob = new (size) BufferBlob(name, size);
263 }
264 // Track memory usage statistic after releasing CodeCache_lock
265 MemoryService::track_code_cache_memory_usage();
266
267 return blob;
268 }
269
270
271 BufferBlob::BufferBlob(const char* name, int header_size, int size, CodeBuffer* cb)
272 : RuntimeBlob(name, cb, header_size, size, CodeOffsets::frame_never_safe, 0, nullptr)
273 {}
274
275 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
276 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
277
278 BufferBlob* blob = nullptr;
279 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
280 assert(name != nullptr, "must provide a name");
281 {
282 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
283 blob = new (size) BufferBlob(name, sizeof(BufferBlob), size, cb);
284 }
285 // Track memory usage statistic after releasing CodeCache_lock
286 MemoryService::track_code_cache_memory_usage();
287
288 return blob;
289 }
290
291 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
292 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
293 }
294
295 void BufferBlob::free(BufferBlob *blob) {
296 RuntimeBlob::free(blob);
297 }
298
299 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments)
300 : RuntimeBlob(name, cb, sizeof(BufferBlob), size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
301 {}
302
303
304 //----------------------------------------------------------------------------------------------------
305 // Implementation of AdapterBlob
306
307 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) :
308 BufferBlob("I2C/C2I adapters", size, cb, frame_complete, frame_size, oop_maps, caller_must_gc_arguments) {
309 CodeCache::commit(this);
310 }
311
312 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments) {
313 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
314
315 CodeCache::gc_on_allocation();
316
317 AdapterBlob* blob = nullptr;
318 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
319 {
320 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
321 blob = new (size) AdapterBlob(size, cb, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
322 }
323 // Track memory usage statistic after releasing CodeCache_lock
324 MemoryService::track_code_cache_memory_usage();
325
326 return blob;
327 }
328
329 void* VtableBlob::operator new(size_t s, unsigned size) throw() {
330 // Handling of allocation failure stops compilation and prints a bunch of
331 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
332 // can be locked, and then re-locking the CodeCache_lock. That is not safe in
333 // this context as we hold the CompiledICLocker. So we just don't handle code
334 // cache exhaustion here; we leave that for a later allocation that does not
335 // hold the CompiledICLocker.
336 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
337 }
338
339 VtableBlob::VtableBlob(const char* name, int size) :
340 BufferBlob(name, size) {
341 }
342
343 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
344 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
345
346 VtableBlob* blob = nullptr;
347 unsigned int size = sizeof(VtableBlob);
348 // align the size to CodeEntryAlignment
349 size = align_code_offset(size);
350 size += align_up(buffer_size, oopSize);
351 assert(name != nullptr, "must provide a name");
352 {
353 if (!CodeCache_lock->try_lock()) {
354 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
355 // IC transition to megamorphic, for which this stub will be needed. It is better to
356 // bail out the transition, and wait for a more opportune moment. Not only is it not
357 // worth waiting for the lock blockingly for the megamorphic transition, it might
358 // also result in a deadlock to blockingly wait, when concurrent class unloading is
359 // performed. At this point in time, the CompiledICLocker is taken, so we are not
360 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
361 // consistently taken in the opposite order. Bailing out results in an IC transition to
362 // the clean state instead, which will cause subsequent calls to retry the transitioning
363 // eventually.
364 return nullptr;
365 }
366 blob = new (size) VtableBlob(name, size);
367 CodeCache_lock->unlock();
368 }
369 // Track memory usage statistic after releasing CodeCache_lock
370 MemoryService::track_code_cache_memory_usage();
371
372 return blob;
373 }
374
375 //----------------------------------------------------------------------------------------------------
376 // Implementation of MethodHandlesAdapterBlob
377
378 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
379 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
380
381 MethodHandlesAdapterBlob* blob = nullptr;
382 unsigned int size = sizeof(MethodHandlesAdapterBlob);
383 // align the size to CodeEntryAlignment
384 size = CodeBlob::align_code_offset(size);
385 size += align_up(buffer_size, oopSize);
386 {
387 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
388 blob = new (size) MethodHandlesAdapterBlob(size);
389 if (blob == nullptr) {
390 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
391 }
392 }
393 // Track memory usage statistic after releasing CodeCache_lock
394 MemoryService::track_code_cache_memory_usage();
395
396 return blob;
397 }
398
399 //----------------------------------------------------------------------------------------------------
400 // Implementation of BufferedInlineTypeBlob
401 BufferedInlineTypeBlob::BufferedInlineTypeBlob(int size, CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off) :
402 BufferBlob("buffered inline type", sizeof(BufferedInlineTypeBlob), size, cb),
403 _pack_fields_off(pack_fields_off),
404 _pack_fields_jobject_off(pack_fields_jobject_off),
405 _unpack_fields_off(unpack_fields_off) {
406 CodeCache::commit(this);
407 }
408
409 BufferedInlineTypeBlob* BufferedInlineTypeBlob::create(CodeBuffer* cb, int pack_fields_off, int pack_fields_jobject_off, int unpack_fields_off) {
410 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
411
412 BufferedInlineTypeBlob* blob = nullptr;
413 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferedInlineTypeBlob));
414 {
415 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
416 blob = new (size) BufferedInlineTypeBlob(size, cb, pack_fields_off, pack_fields_jobject_off, unpack_fields_off);
417 }
418 // Track memory usage statistic after releasing CodeCache_lock
419 MemoryService::track_code_cache_memory_usage();
420
421 return blob;
422 }
423
424 //----------------------------------------------------------------------------------------------------
425 // Implementation of RuntimeStub
426
427 RuntimeStub::RuntimeStub(
428 const char* name,
429 CodeBuffer* cb,
430 int size,
431 int frame_complete,
432 int frame_size,
433 OopMapSet* oop_maps,
434 bool caller_must_gc_arguments
435 )
436 : RuntimeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
437 {
438 }
439
440 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
441 CodeBuffer* cb,
442 int frame_complete,
443 int frame_size,
444 OopMapSet* oop_maps,
445 bool caller_must_gc_arguments,
446 bool alloc_fail_is_fatal)
447 {
448 RuntimeStub* stub = nullptr;
449 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
450 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
451 {
452 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
453 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
454 if (stub == nullptr) {
455 if (!alloc_fail_is_fatal) {
456 return nullptr;
457 }
458 fatal("Initial size of CodeCache is too small");
459 }
460 }
461
462 trace_new_stub(stub, "RuntimeStub - ", stub_name);
463
464 return stub;
465 }
466
467
468 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
469 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
470 }
471
472 // operator new shared by all singletons:
473 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
474 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
475 if (!p) fatal("Initial size of CodeCache is too small");
476 return p;
477 }
478
479
480 //----------------------------------------------------------------------------------------------------
481 // Implementation of DeoptimizationBlob
482
483 DeoptimizationBlob::DeoptimizationBlob(
484 CodeBuffer* cb,
485 int size,
486 OopMapSet* oop_maps,
487 int unpack_offset,
488 int unpack_with_exception_offset,
489 int unpack_with_reexecution_offset,
490 int frame_size
491 )
492 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)
493 {
494 _unpack_offset = unpack_offset;
495 _unpack_with_exception = unpack_with_exception_offset;
496 _unpack_with_reexecution = unpack_with_reexecution_offset;
497 #ifdef COMPILER1
498 _unpack_with_exception_in_tls = -1;
499 #endif
500 }
501
502
503 DeoptimizationBlob* DeoptimizationBlob::create(
504 CodeBuffer* cb,
505 OopMapSet* oop_maps,
506 int unpack_offset,
507 int unpack_with_exception_offset,
508 int unpack_with_reexecution_offset,
509 int frame_size)
510 {
511 DeoptimizationBlob* blob = nullptr;
512 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
513 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
514 {
515 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
516 blob = new (size) DeoptimizationBlob(cb,
517 size,
518 oop_maps,
519 unpack_offset,
520 unpack_with_exception_offset,
521 unpack_with_reexecution_offset,
522 frame_size);
523 }
524
525 trace_new_stub(blob, "DeoptimizationBlob");
526
527 return blob;
528 }
529
530
531 //----------------------------------------------------------------------------------------------------
532 // Implementation of UncommonTrapBlob
533
534 #ifdef COMPILER2
535 UncommonTrapBlob::UncommonTrapBlob(
536 CodeBuffer* cb,
537 int size,
538 OopMapSet* oop_maps,
539 int frame_size
540 )
541 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)
542 {}
543
544
545 UncommonTrapBlob* UncommonTrapBlob::create(
546 CodeBuffer* cb,
547 OopMapSet* oop_maps,
548 int frame_size)
549 {
550 UncommonTrapBlob* blob = nullptr;
551 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
552 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
553 {
554 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
555 blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
556 }
557
558 trace_new_stub(blob, "UncommonTrapBlob");
559
560 return blob;
561 }
562
563
564 #endif // COMPILER2
565
566
567 //----------------------------------------------------------------------------------------------------
568 // Implementation of ExceptionBlob
569
570 #ifdef COMPILER2
571 ExceptionBlob::ExceptionBlob(
572 CodeBuffer* cb,
573 int size,
574 OopMapSet* oop_maps,
575 int frame_size
576 )
577 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)
578 {}
579
580
581 ExceptionBlob* ExceptionBlob::create(
582 CodeBuffer* cb,
583 OopMapSet* oop_maps,
584 int frame_size)
585 {
586 ExceptionBlob* blob = nullptr;
587 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
588 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
589 {
590 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
591 blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
592 }
593
594 trace_new_stub(blob, "ExceptionBlob");
595
596 return blob;
597 }
598
599
600 #endif // COMPILER2
601
602
603 //----------------------------------------------------------------------------------------------------
604 // Implementation of SafepointBlob
605
606 SafepointBlob::SafepointBlob(
607 CodeBuffer* cb,
608 int size,
609 OopMapSet* oop_maps,
610 int frame_size
611 )
612 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)
613 {}
614
615
616 SafepointBlob* SafepointBlob::create(
617 CodeBuffer* cb,
618 OopMapSet* oop_maps,
619 int frame_size)
620 {
621 SafepointBlob* blob = nullptr;
622 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
623 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
624 {
625 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
626 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
627 }
628
629 trace_new_stub(blob, "SafepointBlob");
630
631 return blob;
632 }
633
634
635 //----------------------------------------------------------------------------------------------------
636 // Verification and printing
637
638 void CodeBlob::print_on(outputStream* st) const {
639 st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
640 st->print_cr("Framesize: %d", _frame_size);
641 }
642
643 void CodeBlob::print() const { print_on(tty); }
644
645 void CodeBlob::print_value_on(outputStream* st) const {
646 st->print_cr("[CodeBlob]");
647 }
648
649 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
650 if (is_buffer_blob()) {
651 // the interpreter is generated into a buffer blob
652 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
653 if (i != nullptr) {
654 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
655 i->print_on(st);
656 return;
657 }
658 if (Interpreter::contains(addr)) {
659 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
660 " (not bytecode specific)", p2i(addr));
661 return;
662 }
663 //
664 if (AdapterHandlerLibrary::contains(this)) {
665 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
666 AdapterHandlerLibrary::print_handler_on(st, this);
667 }
668 // the stubroutines are generated into a buffer blob
669 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
670 if (d != nullptr) {
671 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
672 d->print_on(st);
673 st->cr();
674 return;
675 }
676 if (StubRoutines::contains(addr)) {
677 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
678 return;
679 }
680 VtableStub* v = VtableStubs::stub_containing(addr);
681 if (v != nullptr) {
682 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
683 v->print_on(st);
684 st->cr();
685 return;
686 }
687 }
688 if (is_nmethod()) {
689 nmethod* nm = (nmethod*)this;
690 ResourceMark rm;
691 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
692 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
693 if (verbose) {
694 st->print(" for ");
695 nm->method()->print_value_on(st);
696 }
697 st->cr();
698 if (verbose && st == tty) {
699 // verbose is only ever true when called from findpc in debug.cpp
700 nm->print_nmethod(true);
701 } else {
702 nm->print(st);
703 }
704 return;
705 }
706 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
707 print_on(st);
708 }
709
710 void RuntimeBlob::verify() {
711 ShouldNotReachHere();
712 }
713
714 void BufferBlob::verify() {
715 // unimplemented
716 }
717
718 void BufferBlob::print_on(outputStream* st) const {
719 RuntimeBlob::print_on(st);
720 print_value_on(st);
721 }
722
723 void BufferBlob::print_value_on(outputStream* st) const {
724 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
725 }
726
727 void RuntimeStub::verify() {
728 // unimplemented
729 }
730
731 void RuntimeStub::print_on(outputStream* st) const {
732 ttyLocker ttyl;
733 RuntimeBlob::print_on(st);
734 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
735 st->print_cr("%s", name());
736 Disassembler::decode((RuntimeBlob*)this, st);
737 }
738
739 void RuntimeStub::print_value_on(outputStream* st) const {
740 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
741 }
742
743 void SingletonBlob::verify() {
744 // unimplemented
745 }
746
747 void SingletonBlob::print_on(outputStream* st) const {
748 ttyLocker ttyl;
749 RuntimeBlob::print_on(st);
750 st->print_cr("%s", name());
751 Disassembler::decode((RuntimeBlob*)this, st);
752 }
753
754 void SingletonBlob::print_value_on(outputStream* st) const {
755 st->print_cr("%s", name());
756 }
757
758 void DeoptimizationBlob::print_value_on(outputStream* st) const {
759 st->print_cr("Deoptimization (frame not available)");
760 }
761
762 // Implementation of UpcallStub
763
764 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
765 RuntimeBlob(name, cb, sizeof(UpcallStub), size, CodeOffsets::frame_never_safe, 0 /* no frame size */,
766 /* oop maps = */ nullptr, /* caller must gc arguments = */ false),
767 _receiver(receiver),
768 _frame_data_offset(frame_data_offset) {
769 CodeCache::commit(this);
770 }
771
772 void* UpcallStub::operator new(size_t s, unsigned size) throw() {
773 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
774 }
775
776 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
777 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
778
779 UpcallStub* blob = nullptr;
780 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
781 {
782 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
783 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
784 }
785 if (blob == nullptr) {
786 return nullptr; // caller must handle this
787 }
788
789 // Track memory usage statistic after releasing CodeCache_lock
790 MemoryService::track_code_cache_memory_usage();
791
792 trace_new_stub(blob, "UpcallStub");
793
794 return blob;
795 }
796
797 void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
798 frame_data_for_frame(frame)->old_handles->oops_do(f);
799 }
800
801 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
802 return &frame_data_for_frame(frame)->jfa;
803 }
804
805 void UpcallStub::free(UpcallStub* blob) {
806 assert(blob != nullptr, "caller must check for nullptr");
807 JNIHandles::destroy_global(blob->receiver());
808 RuntimeBlob::free(blob);
809 }
810
811 void UpcallStub::preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, OopClosure* f) {
812 ShouldNotReachHere(); // caller should never have to gc arguments
813 }
814
815 // Misc.
816 void UpcallStub::verify() {
817 // unimplemented
818 }
819
820 void UpcallStub::print_on(outputStream* st) const {
821 RuntimeBlob::print_on(st);
822 print_value_on(st);
823 Disassembler::decode((RuntimeBlob*)this, st);
824 }
825
826 void UpcallStub::print_value_on(outputStream* st) const {
827 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
828 }