1 /*
2 * Copyright (c) 1998, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "code/codeBlob.hpp"
26 #include "code/codeCache.hpp"
27 #include "code/relocInfo.hpp"
28 #include "code/vtableStubs.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "compiler/oopMap.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "interpreter/interpreter.hpp"
33 #include "jvm.h"
34 #include "memory/allocation.inline.hpp"
35 #include "memory/heap.hpp"
36 #include "memory/resourceArea.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/forte.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "runtime/handles.inline.hpp"
41 #include "runtime/interfaceSupport.inline.hpp"
42 #include "runtime/javaFrameAnchor.hpp"
43 #include "runtime/jniHandles.inline.hpp"
44 #include "runtime/mutexLocker.hpp"
45 #include "runtime/safepoint.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "runtime/stubCodeGenerator.hpp"
48 #include "runtime/stubRoutines.hpp"
49 #include "runtime/vframe.hpp"
50 #include "services/memoryService.hpp"
51 #include "utilities/align.hpp"
52 #ifdef COMPILER1
53 #include "c1/c1_Runtime1.hpp"
54 #endif
55
56 #include <type_traits>
57
58 // Virtual methods are not allowed in code blobs to simplify caching compiled code.
59 // Check all "leaf" subclasses of CodeBlob class.
60
61 static_assert(!std::is_polymorphic<nmethod>::value, "no virtual methods are allowed in nmethod");
62 static_assert(!std::is_polymorphic<AdapterBlob>::value, "no virtual methods are allowed in code blobs");
63 static_assert(!std::is_polymorphic<VtableBlob>::value, "no virtual methods are allowed in code blobs");
64 static_assert(!std::is_polymorphic<MethodHandlesAdapterBlob>::value, "no virtual methods are allowed in code blobs");
65 static_assert(!std::is_polymorphic<RuntimeStub>::value, "no virtual methods are allowed in code blobs");
66 static_assert(!std::is_polymorphic<DeoptimizationBlob>::value, "no virtual methods are allowed in code blobs");
67 static_assert(!std::is_polymorphic<SafepointBlob>::value, "no virtual methods are allowed in code blobs");
68 static_assert(!std::is_polymorphic<UpcallStub>::value, "no virtual methods are allowed in code blobs");
69 #ifdef COMPILER2
70 static_assert(!std::is_polymorphic<ExceptionBlob>::value, "no virtual methods are allowed in code blobs");
71 static_assert(!std::is_polymorphic<UncommonTrapBlob>::value, "no virtual methods are allowed in code blobs");
72 #endif
73
74 // Add proxy vtables.
75 // We need only few for now - they are used only from prints.
76 const nmethod::Vptr nmethod::_vpntr;
77 const BufferBlob::Vptr BufferBlob::_vpntr;
78 const RuntimeStub::Vptr RuntimeStub::_vpntr;
79 const SingletonBlob::Vptr SingletonBlob::_vpntr;
80 const DeoptimizationBlob::Vptr DeoptimizationBlob::_vpntr;
81 #ifdef COMPILER2
82 const ExceptionBlob::Vptr ExceptionBlob::_vpntr;
83 #endif // COMPILER2
84 const UpcallStub::Vptr UpcallStub::_vpntr;
85
86 const CodeBlob::Vptr* CodeBlob::vptr(CodeBlobKind kind) {
87 constexpr const CodeBlob::Vptr* array[(size_t)CodeBlobKind::Number_Of_Kinds] = {
88 nullptr/* None */,
89 &nmethod::_vpntr,
90 &BufferBlob::_vpntr,
91 &AdapterBlob::_vpntr,
92 &VtableBlob::_vpntr,
93 &MethodHandlesAdapterBlob::_vpntr,
94 &RuntimeStub::_vpntr,
95 &DeoptimizationBlob::_vpntr,
96 &SafepointBlob::_vpntr,
97 #ifdef COMPILER2
98 &ExceptionBlob::_vpntr,
99 &UncommonTrapBlob::_vpntr,
100 #endif
101 &UpcallStub::_vpntr
102 };
103
104 return array[(size_t)kind];
105 }
106
107 const CodeBlob::Vptr* CodeBlob::vptr() const {
108 return vptr(_kind);
109 }
110
111 unsigned int CodeBlob::align_code_offset(int offset) {
112 // align the size to CodeEntryAlignment
113 int header_size = (int)CodeHeap::header_size();
114 return align_up(offset + header_size, CodeEntryAlignment) - header_size;
115 }
116
117 // This must be consistent with the CodeBlob constructor's layout actions.
118 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
119 // align the size to CodeEntryAlignment
120 unsigned int size = align_code_offset(header_size);
121 size += align_up(cb->total_content_size(), oopSize);
122 size += align_up(cb->total_oop_size(), oopSize);
123 return size;
124 }
125
126 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
127 int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
128 int mutable_data_size) :
129 _oop_maps(nullptr), // will be set by set_oop_maps() call
130 _name(name),
131 _mutable_data(header_begin() + size), // default value is blob_end()
132 _size(size),
133 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
134 _content_offset(CodeBlob::align_code_offset(header_size)),
135 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
136 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)),
137 _frame_size(frame_size),
138 _mutable_data_size(mutable_data_size),
139 S390_ONLY(_ctable_offset(0) COMMA)
140 _header_size(header_size),
141 _frame_complete_offset(frame_complete_offset),
142 _kind(kind),
143 _caller_must_gc_arguments(caller_must_gc_arguments)
144 {
145 assert(is_aligned(_size, oopSize), "unaligned size");
146 assert(is_aligned(header_size, oopSize), "unaligned size");
147 assert(is_aligned(_relocation_size, oopSize), "unaligned size");
148 assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size);
149 assert(is_nmethod() || (cb->total_oop_size() + cb->total_metadata_size() == 0), "must be nmethod");
150 assert(code_end() == content_end(), "must be the same - see code_end()");
151 #ifdef COMPILER1
152 // probably wrong for tiered
153 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
154 #endif // COMPILER1
155
156 if (_mutable_data_size > 0) {
157 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
158 if (_mutable_data == nullptr) {
159 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
160 }
161 } else {
162 // We need unique and valid not null address
163 assert(_mutable_data == blob_end(), "sanity");
164 }
165
166 set_oop_maps(oop_maps);
167 }
168
169 // Simple CodeBlob used for simple BufferBlob.
170 CodeBlob::CodeBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size) :
171 _oop_maps(nullptr),
172 _name(name),
173 _mutable_data(header_begin() + size), // default value is blob_end()
174 _size(size),
175 _relocation_size(0),
176 _content_offset(CodeBlob::align_code_offset(header_size)),
177 _code_offset(_content_offset),
178 _data_offset(size),
179 _frame_size(0),
180 _mutable_data_size(0),
181 S390_ONLY(_ctable_offset(0) COMMA)
182 _header_size(header_size),
183 _frame_complete_offset(CodeOffsets::frame_never_safe),
184 _kind(kind),
185 _caller_must_gc_arguments(false)
186 {
187 assert(is_aligned(size, oopSize), "unaligned size");
188 assert(is_aligned(header_size, oopSize), "unaligned size");
189 assert(_mutable_data == blob_end(), "sanity");
190 }
191
192 void CodeBlob::restore_mutable_data(address reloc_data) {
193 // Relocation data is now stored as part of the mutable data area; allocate it before copy relocations
194 if (_mutable_data_size > 0) {
195 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
196 if (_mutable_data == nullptr) {
197 vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
198 }
199 } else {
200 _mutable_data = blob_end(); // default value
201 }
202 if (_relocation_size > 0) {
203 assert(_mutable_data_size > 0, "relocation is part of mutable data section");
204 memcpy((address)relocation_begin(), reloc_data, relocation_size());
205 }
206 }
207
208 void CodeBlob::purge() {
209 assert(_mutable_data != nullptr, "should never be null");
210 if (_mutable_data != blob_end()) {
211 os::free(_mutable_data);
212 _mutable_data = blob_end(); // Valid not null address
213 _mutable_data_size = 0;
214 _relocation_size = 0;
215 }
216 if (_oop_maps != nullptr) {
217 delete _oop_maps;
218 _oop_maps = nullptr;
219 }
220 NOT_PRODUCT(_asm_remarks.clear());
221 NOT_PRODUCT(_dbg_strings.clear());
222 }
223
224 void CodeBlob::set_oop_maps(OopMapSet* p) {
225 // Danger Will Robinson! This method allocates a big
226 // chunk of memory, its your job to free it.
227 if (p != nullptr) {
228 _oop_maps = ImmutableOopMapSet::build_from(p);
229 } else {
230 _oop_maps = nullptr;
231 }
232 }
233
234 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
235 assert(_oop_maps != nullptr, "nope");
236 return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
237 }
238
239 void CodeBlob::print_code_on(outputStream* st) {
240 ResourceMark m;
241 Disassembler::decode(this, st);
242 }
243
244 void CodeBlob::prepare_for_archiving_impl() {
245 set_name(nullptr);
246 _oop_maps = nullptr;
247 _mutable_data = nullptr;
248 #ifndef PRODUCT
249 asm_remarks().clear();
250 dbg_strings().clear();
251 #endif /* PRODUCT */
252 }
253
254 void CodeBlob::prepare_for_archiving() {
255 vptr(_kind)->prepare_for_archiving(this);
256 }
257
258 void CodeBlob::archive_blob(CodeBlob* blob, address archive_buffer) {
259 blob->copy_to(archive_buffer);
260 CodeBlob* archived_blob = (CodeBlob*)archive_buffer;
261 archived_blob->prepare_for_archiving();
262 }
263
264 void CodeBlob::post_restore_impl() {
265 // Track memory usage statistic after releasing CodeCache_lock
266 MemoryService::track_code_cache_memory_usage();
267 }
268
269 void CodeBlob::post_restore() {
270 vptr(_kind)->post_restore(this);
271 }
272
273 CodeBlob* CodeBlob::restore(address code_cache_buffer,
274 const char* name,
275 address archived_reloc_data,
276 ImmutableOopMapSet* archived_oop_maps)
277 {
278 copy_to(code_cache_buffer);
279 CodeBlob* code_blob = (CodeBlob*)code_cache_buffer;
280 code_blob->set_name(name);
281 code_blob->restore_mutable_data(archived_reloc_data);
282 code_blob->set_oop_maps(archived_oop_maps);
283 return code_blob;
284 }
285
286 CodeBlob* CodeBlob::create(CodeBlob* archived_blob,
287 const char* name,
288 address archived_reloc_data,
289 ImmutableOopMapSet* archived_oop_maps
290 )
291 {
292 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
293
294 CodeCache::gc_on_allocation();
295
296 CodeBlob* blob = nullptr;
297 unsigned int size = archived_blob->size();
298 {
299 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
300 address code_cache_buffer = (address)CodeCache::allocate(size, CodeBlobType::NonNMethod);
301 if (code_cache_buffer != nullptr) {
302 blob = archived_blob->restore(code_cache_buffer,
303 name,
304 archived_reloc_data,
305 archived_oop_maps);
306 assert(blob != nullptr, "sanity check");
307
308 // Flush the code block
309 ICache::invalidate_range(blob->code_begin(), blob->code_size());
310 CodeCache::commit(blob); // Count adapters
311 }
312 }
313 if (blob != nullptr) {
314 blob->post_restore();
315 }
316 return blob;
317 }
318
319 //-----------------------------------------------------------------------------------------
320 // Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info.
321
322 RuntimeBlob::RuntimeBlob(
323 const char* name,
324 CodeBlobKind kind,
325 CodeBuffer* cb,
326 int size,
327 uint16_t header_size,
328 int16_t frame_complete,
329 int frame_size,
330 OopMapSet* oop_maps,
331 bool caller_must_gc_arguments)
332 : CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments,
333 align_up(cb->total_relocation_size(), oopSize))
334 {
335 cb->copy_code_and_locs_to(this);
336 }
337
338 void RuntimeBlob::free(RuntimeBlob* blob) {
339 assert(blob != nullptr, "caller must check for nullptr");
340 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
341 blob->purge();
342 {
343 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
344 CodeCache::free(blob);
345 }
346 // Track memory usage statistic after releasing CodeCache_lock
347 MemoryService::track_code_cache_memory_usage();
348 }
349
350 void RuntimeBlob::trace_new_stub(RuntimeBlob* stub, const char* name1, const char* name2) {
351 // Do not hold the CodeCache lock during name formatting.
352 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
353
354 if (stub != nullptr && (PrintStubCode ||
355 Forte::is_enabled() ||
356 JvmtiExport::should_post_dynamic_code_generated())) {
357 char stub_id[256];
358 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
359 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
360 if (PrintStubCode) {
361 ttyLocker ttyl;
362 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
363 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
364 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
365 Disassembler::decode(stub->code_begin(), stub->code_end(), tty
366 NOT_PRODUCT(COMMA &stub->asm_remarks()));
367 if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
368 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
369 stub->oop_maps()->print();
370 }
371 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
372 tty->cr();
373 }
374 if (Forte::is_enabled()) {
375 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
376 }
377
378 if (JvmtiExport::should_post_dynamic_code_generated()) {
379 const char* stub_name = name2;
380 if (name2[0] == '\0') stub_name = name1;
381 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
382 }
383 }
384
385 // Track memory usage statistic after releasing CodeCache_lock
386 MemoryService::track_code_cache_memory_usage();
387 }
388
389 //----------------------------------------------------------------------------------------------------
390 // Implementation of BufferBlob
391
392 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, int size, uint16_t header_size)
393 : RuntimeBlob(name, kind, size, header_size)
394 {}
395
396 BufferBlob* BufferBlob::create(const char* name, uint buffer_size) {
397 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
398
399 BufferBlob* blob = nullptr;
400 unsigned int size = sizeof(BufferBlob);
401 // align the size to CodeEntryAlignment
402 size = CodeBlob::align_code_offset(size);
403 size += align_up(buffer_size, oopSize);
404 assert(name != nullptr, "must provide a name");
405 {
406 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
407 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size);
408 }
409 // Track memory usage statistic after releasing CodeCache_lock
410 MemoryService::track_code_cache_memory_usage();
411
412 return blob;
413 }
414
415
416 BufferBlob::BufferBlob(const char* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size)
417 : RuntimeBlob(name, kind, cb, size, header_size, CodeOffsets::frame_never_safe, 0, nullptr)
418 {}
419
420 // Used by gtest
421 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
422 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
423
424 BufferBlob* blob = nullptr;
425 unsigned int size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
426 assert(name != nullptr, "must provide a name");
427 {
428 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
429 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size);
430 }
431 // Track memory usage statistic after releasing CodeCache_lock
432 MemoryService::track_code_cache_memory_usage();
433
434 return blob;
435 }
436
437 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
438 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
439 }
440
441 void BufferBlob::free(BufferBlob *blob) {
442 RuntimeBlob::free(blob);
443 }
444
445
446 //----------------------------------------------------------------------------------------------------
447 // Implementation of AdapterBlob
448
449 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) :
450 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size, sizeof(AdapterBlob)) {
451 assert(entry_offset[0] == 0, "sanity check");
452 for (int i = 1; i < AdapterBlob::ENTRY_COUNT; i++) {
453 // The entry is within the adapter blob or unset.
454 assert((entry_offset[i] > 0 && entry_offset[i] < cb->insts()->size()) ||
455 (entry_offset[i] == -1),
456 "invalid entry offset[%d] = 0x%x", i, entry_offset[i]);
457 }
458 _c2i_offset = entry_offset[1];
459 _c2i_unverified_offset = entry_offset[2];
460 _c2i_no_clinit_check_offset = entry_offset[3];
461 CodeCache::commit(this);
462 }
463
464 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int entry_offset[AdapterBlob::ENTRY_COUNT]) {
465 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
466
467 CodeCache::gc_on_allocation();
468
469 AdapterBlob* blob = nullptr;
470 unsigned int size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
471 {
472 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
473 blob = new (size) AdapterBlob(size, cb, entry_offset);
474 }
475 // Track memory usage statistic after releasing CodeCache_lock
476 MemoryService::track_code_cache_memory_usage();
477
478 return blob;
479 }
480
481 void AdapterBlob::get_offsets(int entry_offset[ENTRY_COUNT]) {
482 entry_offset[0] = 0;
483 entry_offset[1] = _c2i_offset;
484 entry_offset[2] = _c2i_unverified_offset;
485 entry_offset[3] = _c2i_no_clinit_check_offset;
486 }
487
488 //----------------------------------------------------------------------------------------------------
489 // Implementation of VtableBlob
490
491 void* VtableBlob::operator new(size_t s, unsigned size) throw() {
492 // Handling of allocation failure stops compilation and prints a bunch of
493 // stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
494 // can be locked, and then re-locking the CodeCache_lock. That is not safe in
495 // this context as we hold the CompiledICLocker. So we just don't handle code
496 // cache exhaustion here; we leave that for a later allocation that does not
497 // hold the CompiledICLocker.
498 return CodeCache::allocate(size, CodeBlobType::NonNMethod, false /* handle_alloc_failure */);
499 }
500
501 VtableBlob::VtableBlob(const char* name, int size) :
502 BufferBlob(name, CodeBlobKind::Vtable, size) {
503 }
504
505 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
506 assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");
507
508 VtableBlob* blob = nullptr;
509 unsigned int size = sizeof(VtableBlob);
510 // align the size to CodeEntryAlignment
511 size = align_code_offset(size);
512 size += align_up(buffer_size, oopSize);
513 assert(name != nullptr, "must provide a name");
514 {
515 if (!CodeCache_lock->try_lock()) {
516 // If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
517 // IC transition to megamorphic, for which this stub will be needed. It is better to
518 // bail out the transition, and wait for a more opportune moment. Not only is it not
519 // worth waiting for the lock blockingly for the megamorphic transition, it might
520 // also result in a deadlock to blockingly wait, when concurrent class unloading is
521 // performed. At this point in time, the CompiledICLocker is taken, so we are not
522 // allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
523 // consistently taken in the opposite order. Bailing out results in an IC transition to
524 // the clean state instead, which will cause subsequent calls to retry the transitioning
525 // eventually.
526 return nullptr;
527 }
528 blob = new (size) VtableBlob(name, size);
529 CodeCache_lock->unlock();
530 }
531 // Track memory usage statistic after releasing CodeCache_lock
532 MemoryService::track_code_cache_memory_usage();
533
534 return blob;
535 }
536
537 //----------------------------------------------------------------------------------------------------
538 // Implementation of MethodHandlesAdapterBlob
539
540 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
541 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
542
543 MethodHandlesAdapterBlob* blob = nullptr;
544 unsigned int size = sizeof(MethodHandlesAdapterBlob);
545 // align the size to CodeEntryAlignment
546 size = CodeBlob::align_code_offset(size);
547 size += align_up(buffer_size, oopSize);
548 {
549 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
550 blob = new (size) MethodHandlesAdapterBlob(size);
551 if (blob == nullptr) {
552 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
553 }
554 }
555 // Track memory usage statistic after releasing CodeCache_lock
556 MemoryService::track_code_cache_memory_usage();
557
558 return blob;
559 }
560
561 //----------------------------------------------------------------------------------------------------
562 // Implementation of RuntimeStub
563
564 RuntimeStub::RuntimeStub(
565 const char* name,
566 CodeBuffer* cb,
567 int size,
568 int16_t frame_complete,
569 int frame_size,
570 OopMapSet* oop_maps,
571 bool caller_must_gc_arguments
572 )
573 : RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub),
574 frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
575 {
576 }
577
578 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
579 CodeBuffer* cb,
580 int16_t frame_complete,
581 int frame_size,
582 OopMapSet* oop_maps,
583 bool caller_must_gc_arguments,
584 bool alloc_fail_is_fatal)
585 {
586 RuntimeStub* stub = nullptr;
587 unsigned int size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
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 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
592 if (stub == nullptr) {
593 if (!alloc_fail_is_fatal) {
594 return nullptr;
595 }
596 fatal("Initial size of CodeCache is too small");
597 }
598 }
599
600 trace_new_stub(stub, "RuntimeStub - ", stub_name);
601
602 return stub;
603 }
604
605
606 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
607 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
608 }
609
610 // operator new shared by all singletons:
611 void* SingletonBlob::operator new(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() {
612 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
613 if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small");
614 return p;
615 }
616
617
618 //----------------------------------------------------------------------------------------------------
619 // Implementation of DeoptimizationBlob
620
621 DeoptimizationBlob::DeoptimizationBlob(
622 CodeBuffer* cb,
623 int size,
624 OopMapSet* oop_maps,
625 int unpack_offset,
626 int unpack_with_exception_offset,
627 int unpack_with_reexecution_offset,
628 int frame_size
629 )
630 : SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
631 size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
632 {
633 _unpack_offset = unpack_offset;
634 _unpack_with_exception = unpack_with_exception_offset;
635 _unpack_with_reexecution = unpack_with_reexecution_offset;
636 #ifdef COMPILER1
637 _unpack_with_exception_in_tls = -1;
638 #endif
639 }
640
641
642 DeoptimizationBlob* DeoptimizationBlob::create(
643 CodeBuffer* cb,
644 OopMapSet* oop_maps,
645 int unpack_offset,
646 int unpack_with_exception_offset,
647 int unpack_with_reexecution_offset,
648 int frame_size)
649 {
650 DeoptimizationBlob* blob = nullptr;
651 unsigned int size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
652 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
653 {
654 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
655 blob = new (size) DeoptimizationBlob(cb,
656 size,
657 oop_maps,
658 unpack_offset,
659 unpack_with_exception_offset,
660 unpack_with_reexecution_offset,
661 frame_size);
662 }
663
664 trace_new_stub(blob, "DeoptimizationBlob");
665
666 return blob;
667 }
668
669 #ifdef COMPILER2
670
671 //----------------------------------------------------------------------------------------------------
672 // Implementation of UncommonTrapBlob
673
674 UncommonTrapBlob::UncommonTrapBlob(
675 CodeBuffer* cb,
676 int size,
677 OopMapSet* oop_maps,
678 int frame_size
679 )
680 : SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb,
681 size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
682 {}
683
684
685 UncommonTrapBlob* UncommonTrapBlob::create(
686 CodeBuffer* cb,
687 OopMapSet* oop_maps,
688 int frame_size)
689 {
690 UncommonTrapBlob* blob = nullptr;
691 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
692 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
693 {
694 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
695 blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size);
696 }
697
698 trace_new_stub(blob, "UncommonTrapBlob");
699
700 return blob;
701 }
702
703 //----------------------------------------------------------------------------------------------------
704 // Implementation of ExceptionBlob
705
706 ExceptionBlob::ExceptionBlob(
707 CodeBuffer* cb,
708 int size,
709 OopMapSet* oop_maps,
710 int frame_size
711 )
712 : SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
713 size, sizeof(ExceptionBlob), frame_size, oop_maps)
714 {}
715
716
717 ExceptionBlob* ExceptionBlob::create(
718 CodeBuffer* cb,
719 OopMapSet* oop_maps,
720 int frame_size)
721 {
722 ExceptionBlob* blob = nullptr;
723 unsigned int size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
724 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
725 {
726 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
727 blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size);
728 }
729
730 trace_new_stub(blob, "ExceptionBlob");
731
732 return blob;
733 }
734
735 #endif // COMPILER2
736
737 //----------------------------------------------------------------------------------------------------
738 // Implementation of SafepointBlob
739
740 SafepointBlob::SafepointBlob(
741 CodeBuffer* cb,
742 int size,
743 OopMapSet* oop_maps,
744 int frame_size
745 )
746 : SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb,
747 size, sizeof(SafepointBlob), frame_size, oop_maps)
748 {}
749
750
751 SafepointBlob* SafepointBlob::create(
752 CodeBuffer* cb,
753 OopMapSet* oop_maps,
754 int frame_size)
755 {
756 SafepointBlob* blob = nullptr;
757 unsigned int size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
758 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
759 {
760 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
761 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
762 }
763
764 trace_new_stub(blob, "SafepointBlob");
765
766 return blob;
767 }
768
769 //----------------------------------------------------------------------------------------------------
770 // Implementation of UpcallStub
771
772 UpcallStub::UpcallStub(const char* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
773 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
774 CodeOffsets::frame_never_safe, 0 /* no frame size */,
775 /* oop maps = */ nullptr, /* caller must gc arguments = */ false),
776 _receiver(receiver),
777 _frame_data_offset(frame_data_offset)
778 {
779 CodeCache::commit(this);
780 }
781
782 void* UpcallStub::operator new(size_t s, unsigned size) throw() {
783 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
784 }
785
786 UpcallStub* UpcallStub::create(const char* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
787 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
788
789 UpcallStub* blob = nullptr;
790 unsigned int size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
791 {
792 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
793 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
794 }
795 if (blob == nullptr) {
796 return nullptr; // caller must handle this
797 }
798
799 // Track memory usage statistic after releasing CodeCache_lock
800 MemoryService::track_code_cache_memory_usage();
801
802 trace_new_stub(blob, "UpcallStub - ", name);
803
804 return blob;
805 }
806
807 void UpcallStub::oops_do(OopClosure* f, const frame& frame) {
808 frame_data_for_frame(frame)->old_handles->oops_do(f);
809 }
810
811 JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
812 return &frame_data_for_frame(frame)->jfa;
813 }
814
815 void UpcallStub::free(UpcallStub* blob) {
816 assert(blob != nullptr, "caller must check for nullptr");
817 JNIHandles::destroy_global(blob->receiver());
818 RuntimeBlob::free(blob);
819 }
820
821 //----------------------------------------------------------------------------------------------------
822 // Verification and printing
823
824 void CodeBlob::verify() {
825 if (is_nmethod()) {
826 as_nmethod()->verify();
827 }
828 }
829
830 void CodeBlob::print_on(outputStream* st) const {
831 vptr()->print_on(this, st);
832 }
833
834 void CodeBlob::print() const { print_on(tty); }
835
836 void CodeBlob::print_value_on(outputStream* st) const {
837 vptr()->print_value_on(this, st);
838 }
839
840 void CodeBlob::print_on_impl(outputStream* st) const {
841 st->print_cr("[CodeBlob kind:%d (" INTPTR_FORMAT ")]", (int)_kind, p2i(this));
842 st->print_cr("Framesize: %d", _frame_size);
843 }
844
845 void CodeBlob::print_value_on_impl(outputStream* st) const {
846 st->print_cr("[CodeBlob]");
847 }
848
849 void CodeBlob::print_block_comment(outputStream* stream, address block_begin) const {
850 #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
851 if (is_nmethod()) {
852 as_nmethod()->print_nmethod_labels(stream, block_begin);
853 }
854 #endif
855
856 #ifndef PRODUCT
857 ptrdiff_t offset = block_begin - code_begin();
858 assert(offset >= 0, "Expecting non-negative offset!");
859 _asm_remarks.print(uint(offset), stream);
860 #endif
861 }
862
863 void CodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
864 if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) {
865 // the interpreter is generated into a buffer blob
866 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
867 if (i != nullptr) {
868 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
869 i->print_on(st);
870 return;
871 }
872 if (Interpreter::contains(addr)) {
873 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
874 " (not bytecode specific)", p2i(addr));
875 return;
876 }
877 //
878 if (AdapterHandlerLibrary::contains(this)) {
879 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
880 AdapterHandlerLibrary::print_handler_on(st, this);
881 }
882 // the stubroutines are generated into a buffer blob
883 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
884 if (d != nullptr) {
885 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
886 d->print_on(st);
887 st->cr();
888 return;
889 }
890 if (StubRoutines::contains(addr)) {
891 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
892 return;
893 }
894 VtableStub* v = VtableStubs::stub_containing(addr);
895 if (v != nullptr) {
896 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
897 v->print_on(st);
898 st->cr();
899 return;
900 }
901 }
902 if (is_nmethod()) {
903 nmethod* nm = (nmethod*)this;
904 ResourceMark rm;
905 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
906 p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
907 if (verbose) {
908 st->print(" for ");
909 nm->method()->print_value_on(st);
910 }
911 st->cr();
912 if (verbose && st == tty) {
913 // verbose is only ever true when called from findpc in debug.cpp
914 nm->print_nmethod(true);
915 } else {
916 nm->print_on(st);
917 }
918 return;
919 }
920 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
921 print_on(st);
922 }
923
924 void BufferBlob::print_on_impl(outputStream* st) const {
925 RuntimeBlob::print_on_impl(st);
926 print_value_on_impl(st);
927 }
928
929 void BufferBlob::print_value_on_impl(outputStream* st) const {
930 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
931 }
932
933 void RuntimeStub::print_on_impl(outputStream* st) const {
934 ttyLocker ttyl;
935 RuntimeBlob::print_on_impl(st);
936 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
937 st->print_cr("%s", name());
938 Disassembler::decode((RuntimeBlob*)this, st);
939 }
940
941 void RuntimeStub::print_value_on_impl(outputStream* st) const {
942 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
943 }
944
945 void SingletonBlob::print_on_impl(outputStream* st) const {
946 ttyLocker ttyl;
947 RuntimeBlob::print_on_impl(st);
948 st->print_cr("%s", name());
949 Disassembler::decode((RuntimeBlob*)this, st);
950 }
951
952 void SingletonBlob::print_value_on_impl(outputStream* st) const {
953 st->print_cr("%s", name());
954 }
955
956 void DeoptimizationBlob::print_value_on_impl(outputStream* st) const {
957 st->print_cr("Deoptimization (frame not available)");
958 }
959
960 void UpcallStub::print_on_impl(outputStream* st) const {
961 RuntimeBlob::print_on_impl(st);
962 print_value_on_impl(st);
963 st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
964 oop recv = JNIHandles::resolve(_receiver);
965 st->print("Receiver MH=");
966 recv->print_on(st);
967 Disassembler::decode((RuntimeBlob*)this, st);
968 }
969
970 void UpcallStub::print_value_on_impl(outputStream* st) const {
971 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
972 }