1 /*
2 * Copyright (c) 1998, 2015, 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 "oops/oop.inline.hpp"
35 #include "prims/forte.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "runtime/interfaceSupport.hpp"
38 #include "runtime/mutexLocker.hpp"
39 #include "runtime/safepoint.hpp"
40 #include "runtime/sharedRuntime.hpp"
41 #include "runtime/vframe.hpp"
42 #include "services/memoryService.hpp"
43 #ifdef COMPILER1
44 #include "c1/c1_Runtime1.hpp"
45 #endif
46
47 unsigned int CodeBlob::align_code_offset(int offset) {
48 // align the size to CodeEntryAlignment
49 return
50 ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))
51 - (int)CodeHeap::header_size();
52 }
53
54
55 // This must be consistent with the CodeBlob constructor's layout actions.
56 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
57 unsigned int size = header_size;
58 size += round_to(cb->total_relocation_size(), oopSize);
59 // align the size to CodeEntryAlignment
60 size = align_code_offset(size);
61 size += round_to(cb->total_content_size(), oopSize);
62 size += round_to(cb->total_oop_size(), oopSize);
63 size += round_to(cb->total_metadata_size(), oopSize);
64 return size;
65 }
66
67
68 // Creates a simple CodeBlob. Sets up the size of the different regions.
69 CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) {
70 assert(size == round_to(size, oopSize), "unaligned size");
71 assert(locs_size == round_to(locs_size, oopSize), "unaligned size");
72 assert(header_size == round_to(header_size, oopSize), "unaligned size");
73 assert(!UseRelocIndex, "no space allocated for reloc index yet");
74
75 // Note: If UseRelocIndex is enabled, there needs to be (at least) one
76 // extra word for the relocation information, containing the reloc
77 // index table length. Unfortunately, the reloc index table imple-
78 // mentation is not easily understandable and thus it is not clear
79 // what exactly the format is supposed to be. For now, we just turn
80 // off the use of this table (gri 7/6/2000).
81
82 _name = name;
83 _size = size;
84 _frame_complete_offset = frame_complete;
85 _header_size = header_size;
86 _relocation_size = locs_size;
87 _content_offset = align_code_offset(header_size + _relocation_size);
88 _code_offset = _content_offset;
89 _data_offset = size;
90 _frame_size = 0;
91 set_oop_maps(NULL);
92 _strings = CodeStrings();
93 }
94
95
96 // Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions,
97 // and copy code and relocation info.
98 CodeBlob::CodeBlob(
99 const char* name,
100 CodeBuffer* cb,
101 int header_size,
102 int size,
103 int frame_complete,
104 int frame_size,
105 OopMapSet* oop_maps
106 ) {
107 assert(size == round_to(size, oopSize), "unaligned size");
108 assert(header_size == round_to(header_size, oopSize), "unaligned size");
109
110 _name = name;
111 _size = size;
112 _frame_complete_offset = frame_complete;
113 _header_size = header_size;
114 _relocation_size = round_to(cb->total_relocation_size(), oopSize);
115 _content_offset = align_code_offset(header_size + _relocation_size);
116 _code_offset = _content_offset + cb->total_offset_of(cb->insts());
117 _data_offset = _content_offset + round_to(cb->total_content_size(), oopSize);
118 assert(_data_offset <= size, "codeBlob is too small");
119 _strings = CodeStrings();
120
121 cb->copy_code_and_locs_to(this);
122 set_oop_maps(oop_maps);
123 _frame_size = frame_size;
124 #ifdef COMPILER1
125 // probably wrong for tiered
126 assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
127 #endif // COMPILER1
128 }
129
130
131 void CodeBlob::set_oop_maps(OopMapSet* p) {
132 // Danger Will Robinson! This method allocates a big
133 // chunk of memory, its your job to free it.
134 if (p != NULL) {
135 _oop_maps = ImmutableOopMapSet::build_from(p);
136 } else {
137 _oop_maps = NULL;
138 }
139 }
140
141
142 void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) {
143 // Do not hold the CodeCache lock during name formatting.
144 assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");
145
146 if (stub != NULL) {
147 char stub_id[256];
148 assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
149 jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
150 if (PrintStubCode) {
151 ttyLocker ttyl;
152 tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);
153 Disassembler::decode(stub->code_begin(), stub->code_end());
154 tty->cr();
155 }
156 Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
157
158 if (JvmtiExport::should_post_dynamic_code_generated()) {
159 const char* stub_name = name2;
160 if (name2[0] == '\0') stub_name = name1;
161 JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
162 }
163 }
164
165 // Track memory usage statistic after releasing CodeCache_lock
166 MemoryService::track_code_cache_memory_usage();
167 }
168
169
170 void CodeBlob::flush() {
171 if (_oop_maps) {
172 FREE_C_HEAP_ARRAY(unsigned char, _oop_maps);
173 _oop_maps = NULL;
174 }
175 _strings.free();
176 }
177
178
179 const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) {
180 assert(oop_maps() != NULL, "nope");
181 return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
182 }
183
184 void CodeBlob::print_code() {
185 HandleMark hm;
186 ResourceMark m;
187 Disassembler::decode(this, tty);
188 }
189
190 //----------------------------------------------------------------------------------------------------
191 // Implementation of BufferBlob
192
193
194 BufferBlob::BufferBlob(const char* name, int size)
195 : CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)
196 {}
197
198 BufferBlob* BufferBlob::create(const char* name, int buffer_size) {
199 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
200
201 BufferBlob* blob = NULL;
202 unsigned int size = sizeof(BufferBlob);
203 CodeCacheExtensions::size_blob(name, &buffer_size);
204 // align the size to CodeEntryAlignment
205 size = align_code_offset(size);
206 size += round_to(buffer_size, oopSize);
207 assert(name != NULL, "must provide a name");
208 {
209 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
210 blob = new (size) BufferBlob(name, size);
211 }
212 // Track memory usage statistic after releasing CodeCache_lock
213 MemoryService::track_code_cache_memory_usage();
214
215 return blob;
216 }
217
218
219 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)
220 : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)
221 {}
222
223 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {
224 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
225
226 BufferBlob* blob = NULL;
227 unsigned int size = allocation_size(cb, sizeof(BufferBlob));
228 assert(name != NULL, "must provide a name");
229 {
230 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
231 blob = new (size) BufferBlob(name, size, cb);
232 }
233 // Track memory usage statistic after releasing CodeCache_lock
234 MemoryService::track_code_cache_memory_usage();
235
236 return blob;
237 }
238
239 void* BufferBlob::operator new(size_t s, unsigned size) throw() {
240 return CodeCache::allocate(size, CodeBlobType::NonNMethod);
241 }
242
243 void BufferBlob::free(BufferBlob *blob) {
244 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
245 blob->flush();
246 {
247 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
248 CodeCache::free((CodeBlob*)blob);
249 }
250 // Track memory usage statistic after releasing CodeCache_lock
251 MemoryService::track_code_cache_memory_usage();
252 }
253
254 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps)
255 : CodeBlob(name, cb, sizeof(BufferBlob), size, frame_complete, frame_size, oop_maps)
256 {}
257
258
259 //----------------------------------------------------------------------------------------------------
260 // Implementation of AdapterBlob
261
262 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps) :
263 BufferBlob("I2C/C2I adapters", size, cb, frame_complete, frame_size, oop_maps) {
264 CodeCache::commit(this);
265 }
266
267 AdapterBlob* AdapterBlob::create(CodeBuffer* cb, int frame_complete, int frame_size, OopMapSet* oop_maps) {
268 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
269
270 AdapterBlob* blob = NULL;
271 unsigned int size = allocation_size(cb, sizeof(AdapterBlob));
272 {
273 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
274 blob = new (size) AdapterBlob(size, cb, frame_complete, frame_size, oop_maps);
275 }
276 // Track memory usage statistic after releasing CodeCache_lock
277 MemoryService::track_code_cache_memory_usage();
278
279 return blob;
280 }
281
282
283 //----------------------------------------------------------------------------------------------------
284 // Implementation of MethodHandlesAdapterBlob
285
286 MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
287 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
288
289 MethodHandlesAdapterBlob* blob = NULL;
290 unsigned int size = sizeof(MethodHandlesAdapterBlob);
291 CodeCacheExtensions::size_blob("MethodHandles adapters", &buffer_size);
292 // align the size to CodeEntryAlignment
293 size = align_code_offset(size);
294 size += round_to(buffer_size, oopSize);
295 {
296 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
297 blob = new (size) MethodHandlesAdapterBlob(size);
298 if (blob == NULL) {
299 vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
300 }
301 }
302 // Track memory usage statistic after releasing CodeCache_lock
303 MemoryService::track_code_cache_memory_usage();
304
305 return blob;
306 }
307
308 //----------------------------------------------------------------------------------------------------
309 // Implementation of RuntimeStub
310
311 RuntimeStub::RuntimeStub(
312 const char* name,
313 CodeBuffer* cb,
314 int size,
315 int frame_complete,
316 int frame_size,
317 OopMapSet* oop_maps,
318 bool caller_must_gc_arguments
319 )
320 : CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps)
321 {
322 _caller_must_gc_arguments = caller_must_gc_arguments;
323 }
324
325
326 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,
327 CodeBuffer* cb,
328 int frame_complete,
329 int frame_size,
330 OopMapSet* oop_maps,
331 bool caller_must_gc_arguments)
332 {
333 RuntimeStub* stub = NULL;
334 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
335 if (!CodeCacheExtensions::skip_code_generation()) {
336 // bypass useless code generation
337 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
338 unsigned int size = allocation_size(cb, sizeof(RuntimeStub));
339 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
340 }
341 stub = (RuntimeStub*) CodeCacheExtensions::handle_generated_blob(stub, stub_name);
342
343 trace_new_stub(stub, "RuntimeStub - ", stub_name);
344
345 return stub;
346 }
347
348
349 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {
350 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
351 if (!p) fatal("Initial size of CodeCache is too small");
352 return p;
353 }
354
355 // operator new shared by all singletons:
356 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {
357 void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
358 if (!p) fatal("Initial size of CodeCache is too small");
359 return p;
360 }
361
362
363 //----------------------------------------------------------------------------------------------------
364 // Implementation of DeoptimizationBlob
365
366 DeoptimizationBlob::DeoptimizationBlob(
367 CodeBuffer* cb,
368 int size,
369 OopMapSet* oop_maps,
370 int unpack_offset,
371 int unpack_with_exception_offset,
372 int unpack_with_reexecution_offset,
373 int frame_size
374 )
375 : SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)
376 {
377 _unpack_offset = unpack_offset;
378 _unpack_with_exception = unpack_with_exception_offset;
379 _unpack_with_reexecution = unpack_with_reexecution_offset;
380 #ifdef COMPILER1
381 _unpack_with_exception_in_tls = -1;
382 #endif
383 }
384
385
386 DeoptimizationBlob* DeoptimizationBlob::create(
387 CodeBuffer* cb,
388 OopMapSet* oop_maps,
389 int unpack_offset,
390 int unpack_with_exception_offset,
391 int unpack_with_reexecution_offset,
392 int frame_size)
393 {
394 DeoptimizationBlob* blob = NULL;
395 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
396 {
397 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
398 unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob));
399 blob = new (size) DeoptimizationBlob(cb,
400 size,
401 oop_maps,
402 unpack_offset,
403 unpack_with_exception_offset,
404 unpack_with_reexecution_offset,
405 frame_size);
406 }
407
408 trace_new_stub(blob, "DeoptimizationBlob");
409
410 return blob;
411 }
412
413
414 //----------------------------------------------------------------------------------------------------
415 // Implementation of UncommonTrapBlob
416
417 #ifdef COMPILER2
418 UncommonTrapBlob::UncommonTrapBlob(
419 CodeBuffer* cb,
420 int size,
421 OopMapSet* oop_maps,
422 int frame_size
423 )
424 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)
425 {}
426
427
428 UncommonTrapBlob* UncommonTrapBlob::create(
429 CodeBuffer* cb,
430 OopMapSet* oop_maps,
431 int frame_size)
432 {
433 UncommonTrapBlob* blob = NULL;
434 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
435 {
436 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
437 unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob));
438 blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);
439 }
440
441 trace_new_stub(blob, "UncommonTrapBlob");
442
443 return blob;
444 }
445
446
447 #endif // COMPILER2
448
449
450 //----------------------------------------------------------------------------------------------------
451 // Implementation of ExceptionBlob
452
453 #ifdef COMPILER2
454 ExceptionBlob::ExceptionBlob(
455 CodeBuffer* cb,
456 int size,
457 OopMapSet* oop_maps,
458 int frame_size
459 )
460 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)
461 {}
462
463
464 ExceptionBlob* ExceptionBlob::create(
465 CodeBuffer* cb,
466 OopMapSet* oop_maps,
467 int frame_size)
468 {
469 ExceptionBlob* blob = NULL;
470 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
471 {
472 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
473 unsigned int size = allocation_size(cb, sizeof(ExceptionBlob));
474 blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);
475 }
476
477 trace_new_stub(blob, "ExceptionBlob");
478
479 return blob;
480 }
481
482
483 #endif // COMPILER2
484
485
486 //----------------------------------------------------------------------------------------------------
487 // Implementation of SafepointBlob
488
489 SafepointBlob::SafepointBlob(
490 CodeBuffer* cb,
491 int size,
492 OopMapSet* oop_maps,
493 int frame_size
494 )
495 : SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)
496 {}
497
498
499 SafepointBlob* SafepointBlob::create(
500 CodeBuffer* cb,
501 OopMapSet* oop_maps,
502 int frame_size)
503 {
504 SafepointBlob* blob = NULL;
505 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
506 {
507 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
508 unsigned int size = allocation_size(cb, sizeof(SafepointBlob));
509 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
510 }
511
512 trace_new_stub(blob, "SafepointBlob");
513
514 return blob;
515 }
516
517
518 //----------------------------------------------------------------------------------------------------
519 // Verification and printing
520
521 void CodeBlob::verify() {
522 ShouldNotReachHere();
523 }
524
525 void CodeBlob::print_on(outputStream* st) const {
526 st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
527 st->print_cr("Framesize: %d", _frame_size);
528 }
529
530 void CodeBlob::print_value_on(outputStream* st) const {
531 st->print_cr("[CodeBlob]");
532 }
533
534 void BufferBlob::verify() {
535 // unimplemented
536 }
537
538 void BufferBlob::print_on(outputStream* st) const {
539 CodeBlob::print_on(st);
540 print_value_on(st);
541 }
542
543 void BufferBlob::print_value_on(outputStream* st) const {
544 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
545 }
546
547 void RuntimeStub::verify() {
548 // unimplemented
549 }
550
551 void RuntimeStub::print_on(outputStream* st) const {
552 ttyLocker ttyl;
553 CodeBlob::print_on(st);
554 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
555 st->print_cr("%s", name());
556 Disassembler::decode((CodeBlob*)this, st);
557 }
558
559 void RuntimeStub::print_value_on(outputStream* st) const {
560 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
561 }
562
563 void SingletonBlob::verify() {
564 // unimplemented
565 }
566
567 void SingletonBlob::print_on(outputStream* st) const {
568 ttyLocker ttyl;
569 CodeBlob::print_on(st);
570 st->print_cr("%s", name());
571 Disassembler::decode((CodeBlob*)this, st);
572 }
573
574 void SingletonBlob::print_value_on(outputStream* st) const {
575 st->print_cr("%s", name());
576 }
577
578 void DeoptimizationBlob::print_value_on(outputStream* st) const {
579 st->print_cr("Deoptimization (frame not available)");
580 }