1 /*
2 * Copyright (c) 1998, 2016, 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/codeCacheExtensions.hpp"
29 #include "code/relocInfo.hpp"
30 #include "compiler/disassembler.hpp"
31 #include "interpreter/bytecode.hpp"
32 #include "memory/allocation.inline.hpp"
33 #include "memory/heap.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "prims/forte.hpp"
37 #include "runtime/handles.inline.hpp"
38 #include "runtime/interfaceSupport.hpp"
39 #include "runtime/mutexLocker.hpp"
40 #include "runtime/safepoint.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "runtime/vframe.hpp"
43 #include "services/memoryService.hpp"
44 #ifdef COMPILER1
45 #include "c1/c1_Runtime1.hpp"
46 #endif
47
48 unsigned int CodeBlob::align_code_offset(int offset) {
49 // align the size to CodeEntryAlignment
50 return
51 ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))
52 - (int)CodeHeap::header_size();
53 }
54
55
56 // This must be consistent with the CodeBlob constructor's layout actions.
57 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
58 unsigned int size = header_size;
59 size += round_to(cb->total_relocation_size(), oopSize);
60 // align the size to CodeEntryAlignment
61 size = align_code_offset(size);
62 size += round_to(cb->total_content_size(), oopSize);
63 size += round_to(cb->total_oop_size(), oopSize);
64 size += round_to(cb->total_metadata_size(), oopSize);
65 return size;
66 }
67
68
69 // Creates a simple CodeBlob. Sets up the size of the different regions.
70 CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) {
71 assert(size == round_to(size, oopSize), "unaligned size");
72 assert(locs_size == round_to(locs_size, oopSize), "unaligned size");
73 assert(header_size == round_to(header_size, oopSize), "unaligned size");
74 assert(!UseRelocIndex, "no space allocated for reloc index yet");
75
76 // Note: If UseRelocIndex is enabled, there needs to be (at least) one
77 // extra word for the relocation information, containing the reloc
78 // index table length. Unfortunately, the reloc index table imple-
79 // mentation is not easily understandable and thus it is not clear
80 // what exactly the format is supposed to be. For now, we just turn
81 // off the use of this table (gri 7/6/2000).
82
83 _name = name;
84 _size = size;
85 _frame_complete_offset = frame_complete;
86 _header_size = header_size;
87 _relocation_size = locs_size;
88 _content_offset = align_code_offset(header_size + _relocation_size);
89 _code_offset = _content_offset;
90 _data_offset = size;
91 _frame_size = 0;
92 set_oop_maps(NULL);
93 _strings = CodeStrings();
94 }
95
96
97 // Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions,
98 // and copy code and relocation info.
99 CodeBlob::CodeBlob(
100 const char* name,
101 CodeBuffer* cb,
102 int header_size,
103 int size,
104 int frame_complete,
105 int frame_size,
106 OopMapSet* oop_maps
107 ) {
108 assert(size == round_to(size, oopSize), "unaligned size");
109 assert(header_size == round_to(header_size, oopSize), "unaligned size");
110
111 _name = name;
112 _size = size;
113 _frame_complete_offset = frame_complete;
114 _header_size = header_size;
115 _relocation_size = round_to(cb->total_relocation_size(), oopSize);
116 _content_offset = align_code_offset(header_size + _relocation_size);
117 _code_offset = _content_offset + cb->total_offset_of(cb->insts());
118 _data_offset = _content_offset + round_to(cb->total_content_size(), oopSize);
119 assert(_data_offset <= size, "codeBlob is too small");
120 _strings = CodeStrings();
121
122 cb->copy_code_and_locs_to(this);
123 set_oop_maps(oop_maps);
124 _frame_size = frame_size;
125 #ifdef COMPILER1
126 // probably wrong for tiered
127 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
128 #endif // COMPILER1
129 }
130
131
132 void CodeBlob::set_oop_maps(OopMapSet* p) {
133 // Danger Will Robinson! This method allocates a big
134 // chunk of memory, its your job to free it.
135 if (p != NULL) {
136 _oop_maps = ImmutableOopMapSet::build_from(p);
137 } else {
138 _oop_maps = NULL;
139 }
140 }
141
142
143 void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) {
144 // Do not hold the CodeCache lock during name formatting.
145 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
146
147 if (stub != NULL) {
148 char stub_id[256];
149 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
150 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
151 if (PrintStubCode) {
152 ttyLocker ttyl;
153 tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);
154 Disassembler::decode(stub->code_begin(), stub->code_end());
155 tty->cr();
156 }
157 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
158
159 if (JvmtiExport::should_post_dynamic_code_generated()) {
160 const char* stub_name = name2;
161 if (name2[0] == '\0') stub_name = name1;
162 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
163 }
164 }
165
166 // Track memory usage statistic after releasing CodeCache_lock
167 MemoryService::track_code_cache_memory_usage();
168 }
169
170
171 void CodeBlob::flush() {
172 if (_oop_maps) {
173 FREE_C_HEAP_ARRAY(unsigned char, _oop_maps);
174 _oop_maps = NULL;
175 }
176 _strings.free();
177 }
178
179
180 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) {
181 assert(oop_maps() != NULL, "nope");
182 return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
183 }
184
185 void CodeBlob::print_code() {
186 HandleMark hm;
187 ResourceMark m;
188 Disassembler::decode(this, tty);
189 }
190
191 //----------------------------------------------------------------------------------------------------
192 // Implementation of BufferBlob
193
194
195 BufferBlob::BufferBlob(const char* name, int size)
196 : CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)
197 {}
198
199 BufferBlob* BufferBlob::create(const char* name, int buffer_size) {
200 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
201
202 BufferBlob* blob = NULL;
203 unsigned int size = sizeof(BufferBlob);
204 CodeCacheExtensions::size_blob(name, &buffer_size);
205 // align the size to CodeEntryAlignment
206 size = align_code_offset(size);
207 size += round_to(buffer_size, oopSize);
208 assert(name != NULL, "must provide a name");
209 {
210 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
211 blob = new (size) BufferBlob(name, size);
212 }
213 // Track memory usage statistic after releasing CodeCache_lock
214 MemoryService::track_code_cache_memory_usage();
215
216 return blob;
217 }
218
219
220 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)
221 : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)
222 {}
223
224 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
225 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
226
227 BufferBlob* blob = NULL;
228 unsigned int size = allocation_size(cb, sizeof(BufferBlob));
229 assert(name != NULL, "must provide a name");
230 {
231 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
232 blob = new (size) BufferBlob(name, size, cb);
233 }
234 // Track memory usage statistic after releasing CodeCache_lock
235 MemoryService::track_code_cache_memory_usage();
236
237 return blob;
238 }
239
240 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
241 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
242 }
243
244 void BufferBlob::free(BufferBlob *blob) {
245 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
246 blob->flush();
247 {
248 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
249 CodeCache::free((CodeBlob*)blob);
250 }
251 // Track memory usage statistic after releasing CodeCache_lock
252 MemoryService::track_code_cache_memory_usage();
253 }
254
255
256 //----------------------------------------------------------------------------------------------------
257 // Implementation of AdapterBlob
258
259 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :
260 BufferBlob("I2C/C2I adapters", size, cb) {
261 CodeCache::commit(this);
262 }
263
264 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
265 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
266
267 AdapterBlob* blob = NULL;
268 unsigned int size = allocation_size(cb, sizeof(AdapterBlob));
269 {
270 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
271 blob = new (size) AdapterBlob(size, cb);
272 }
273 // Track memory usage statistic after releasing CodeCache_lock
274 MemoryService::track_code_cache_memory_usage();
275
276 return blob;
277 }
278
279
280 //----------------------------------------------------------------------------------------------------
281 // Implementation of MethodHandlesAdapterBlob
282
283 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
284 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
285
286 MethodHandlesAdapterBlob* blob = NULL;
287 unsigned int size = sizeof(MethodHandlesAdapterBlob);
288 CodeCacheExtensions::size_blob("MethodHandles adapters", &buffer_size);
289 // align the size to CodeEntryAlignment
290 size = align_code_offset(size);
291 size += round_to(buffer_size, oopSize);
292 {
293 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
294 blob = new (size) MethodHandlesAdapterBlob(size);
295 if (blob == NULL) {
296 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
297 }
298 }
299 // Track memory usage statistic after releasing CodeCache_lock
300 MemoryService::track_code_cache_memory_usage();
301
302 return blob;
303 }
304
305 //----------------------------------------------------------------------------------------------------
306 // Implementation of RuntimeStub
307
308 RuntimeStub::RuntimeStub(
309 const char* name,
310 CodeBuffer* cb,
311 int size,
312 int frame_complete,
313 int frame_size,
314 OopMapSet* oop_maps,
315 bool caller_must_gc_arguments
316 )
317 : CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps)
318 {
319 _caller_must_gc_arguments = caller_must_gc_arguments;
320 }
321
322
323 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
324 CodeBuffer* cb,
325 int frame_complete,
326 int frame_size,
327 OopMapSet* oop_maps,
328 bool caller_must_gc_arguments)
329 {
330 RuntimeStub* stub = NULL;
331 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
332 if (!CodeCacheExtensions::skip_code_generation()) {
333 // bypass useless code generation
334 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
335 unsigned int size = allocation_size(cb, sizeof(RuntimeStub));
336 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
337 }
338 stub = (RuntimeStub*) CodeCacheExtensions::handle_generated_blob(stub, stub_name);
339
340 trace_new_stub(stub, "RuntimeStub - ", stub_name);
341
342 return stub;
343 }
344
345
346 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
347 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
348 if (!p) fatal("Initial size of CodeCache is too small");
349 return p;
350 }
351
352 // operator new shared by all singletons:
353 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
354 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
355 if (!p) fatal("Initial size of CodeCache is too small");
356 return p;
357 }
358
359
360 //----------------------------------------------------------------------------------------------------
361 // Implementation of DeoptimizationBlob
362
363 DeoptimizationBlob::DeoptimizationBlob(
364 CodeBuffer* cb,
365 int size,
366 OopMapSet* oop_maps,
367 int unpack_offset,
368 int unpack_with_exception_offset,
369 int unpack_with_reexecution_offset,
370 int frame_size
371 )
372 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)
373 {
374 _unpack_offset = unpack_offset;
375 _unpack_with_exception = unpack_with_exception_offset;
376 _unpack_with_reexecution = unpack_with_reexecution_offset;
377 #ifdef COMPILER1
378 _unpack_with_exception_in_tls = -1;
379 #endif
380 }
381
382
383 DeoptimizationBlob* DeoptimizationBlob::create(
384 CodeBuffer* cb,
385 OopMapSet* oop_maps,
386 int unpack_offset,
387 int unpack_with_exception_offset,
388 int unpack_with_reexecution_offset,
389 int frame_size)
390 {
391 DeoptimizationBlob* blob = NULL;
392 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
393 {
394 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
395 unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob));
396 blob = new (size) DeoptimizationBlob(cb,
397 size,
398 oop_maps,
399 unpack_offset,
400 unpack_with_exception_offset,
401 unpack_with_reexecution_offset,
402 frame_size);
403 }
404
405 trace_new_stub(blob, "DeoptimizationBlob");
406
407 return blob;
408 }
409
410
411 //----------------------------------------------------------------------------------------------------
412 // Implementation of UncommonTrapBlob
413
414 #ifdef COMPILER2
415 UncommonTrapBlob::UncommonTrapBlob(
416 CodeBuffer* cb,
417 int size,
418 OopMapSet* oop_maps,
419 int frame_size
420 )
421 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)
422 {}
423
424
425 UncommonTrapBlob* UncommonTrapBlob::create(
426 CodeBuffer* cb,
427 OopMapSet* oop_maps,
428 int frame_size)
429 {
430 UncommonTrapBlob* blob = NULL;
431 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
432 {
433 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
434 unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob));
435 blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
436 }
437
438 trace_new_stub(blob, "UncommonTrapBlob");
439
440 return blob;
441 }
442
443
444 #endif // COMPILER2
445
446
447 //----------------------------------------------------------------------------------------------------
448 // Implementation of ExceptionBlob
449
450 #ifdef COMPILER2
451 ExceptionBlob::ExceptionBlob(
452 CodeBuffer* cb,
453 int size,
454 OopMapSet* oop_maps,
455 int frame_size
456 )
457 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)
458 {}
459
460
461 ExceptionBlob* ExceptionBlob::create(
462 CodeBuffer* cb,
463 OopMapSet* oop_maps,
464 int frame_size)
465 {
466 ExceptionBlob* blob = NULL;
467 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
468 {
469 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
470 unsigned int size = allocation_size(cb, sizeof(ExceptionBlob));
471 blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
472 }
473
474 trace_new_stub(blob, "ExceptionBlob");
475
476 return blob;
477 }
478
479
480 #endif // COMPILER2
481
482
483 //----------------------------------------------------------------------------------------------------
484 // Implementation of SafepointBlob
485
486 SafepointBlob::SafepointBlob(
487 CodeBuffer* cb,
488 int size,
489 OopMapSet* oop_maps,
490 int frame_size
491 )
492 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)
493 {}
494
495
496 SafepointBlob* SafepointBlob::create(
497 CodeBuffer* cb,
498 OopMapSet* oop_maps,
499 int frame_size)
500 {
501 SafepointBlob* blob = NULL;
502 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
503 {
504 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
505 unsigned int size = allocation_size(cb, sizeof(SafepointBlob));
506 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
507 }
508
509 trace_new_stub(blob, "SafepointBlob");
510
511 return blob;
512 }
513
514
515 //----------------------------------------------------------------------------------------------------
516 // Verification and printing
517
518 void CodeBlob::verify() {
519 ShouldNotReachHere();
520 }
521
522 void CodeBlob::print_on(outputStream* st) const {
523 st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
524 st->print_cr("Framesize: %d", _frame_size);
525 }
526
527 void CodeBlob::print_value_on(outputStream* st) const {
528 st->print_cr("[CodeBlob]");
529 }
530
531 void BufferBlob::verify() {
532 // unimplemented
533 }
534
535 void BufferBlob::print_on(outputStream* st) const {
536 CodeBlob::print_on(st);
537 print_value_on(st);
538 }
539
540 void BufferBlob::print_value_on(outputStream* st) const {
541 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
542 }
543
544 void RuntimeStub::verify() {
545 // unimplemented
546 }
547
548 void RuntimeStub::print_on(outputStream* st) const {
549 ttyLocker ttyl;
550 CodeBlob::print_on(st);
551 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
552 st->print_cr("%s", name());
553 Disassembler::decode((CodeBlob*)this, st);
554 }
555
556 void RuntimeStub::print_value_on(outputStream* st) const {
557 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
558 }
559
560 void SingletonBlob::verify() {
561 // unimplemented
562 }
563
564 void SingletonBlob::print_on(outputStream* st) const {
565 ttyLocker ttyl;
566 CodeBlob::print_on(st);
567 st->print_cr("%s", name());
568 Disassembler::decode((CodeBlob*)this, st);
569 }
570
571 void SingletonBlob::print_value_on(outputStream* st) const {
572 st->print_cr("%s", name());
573 }
574
575 void DeoptimizationBlob::print_value_on(outputStream* st) const {
576 st->print_cr("Deoptimization (frame not available)");
577 }