1 /*
2 * Copyright (c) 1999, 2014, 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 "ci/ciConstant.hpp"
27 #include "ci/ciEnv.hpp"
28 #include "ci/ciField.hpp"
29 #include "ci/ciInstance.hpp"
30 #include "ci/ciInstanceKlass.hpp"
31 #include "ci/ciMethod.hpp"
32 #include "ci/ciNullObject.hpp"
33 #include "ci/ciReplay.hpp"
34 #include "ci/ciUtilities.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "code/scopeDesc.hpp"
38 #include "compiler/compileBroker.hpp"
39 #include "compiler/compileLog.hpp"
40 #include "compiler/compilerOracle.hpp"
41 #include "gc_interface/collectedHeap.inline.hpp"
42 #include "interpreter/linkResolver.hpp"
43 #if INCLUDE_JFR
44 #include "jfr/jfrEvents.hpp"
45 #endif
46 #include "memory/allocation.inline.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/universe.inline.hpp"
49 #include "oops/methodData.hpp"
50 #include "oops/objArrayKlass.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/oop.inline2.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/reflection.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/thread.inline.hpp"
58 #include "utilities/dtrace.hpp"
59 #include "utilities/macros.hpp"
60 #ifdef COMPILER1
61 #include "c1/c1_Runtime1.hpp"
62 #endif
63 #ifdef COMPILER2
64 #include "opto/runtime.hpp"
65 #endif
66
67 // ciEnv
68 //
69 // This class is the top level broker for requests from the compiler
70 // to the VM.
71
72 ciObject* ciEnv::_null_object_instance;
73
74 #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL;
75 WK_KLASSES_DO(WK_KLASS_DEFN)
76 #undef WK_KLASS_DEFN
77
78 ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
79 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
80 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
81
82 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
83 jobject ciEnv::_ArrayStoreException_handle = NULL;
84 jobject ciEnv::_ClassCastException_handle = NULL;
85
86 #ifndef PRODUCT
87 static bool firstEnv = true;
88 #endif /* PRODUCT */
89
90 // ------------------------------------------------------------------
91 // ciEnv::ciEnv
92 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter)
93 : _ciEnv_arena(mtCompiler) {
94 VM_ENTRY_MARK;
95
96 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
97 thread->set_env(this);
98 assert(ciEnv::current() == this, "sanity");
99
100 _oop_recorder = NULL;
101 _debug_info = NULL;
102 _dependencies = NULL;
103 _failure_reason = NULL;
104 _compilable = MethodCompilable;
105 _break_at_compile = false;
106 _compiler_data = NULL;
107 #ifndef PRODUCT
108 assert(!firstEnv, "not initialized properly");
109 #endif /* !PRODUCT */
110
111 _system_dictionary_modification_counter = system_dictionary_modification_counter;
112 _num_inlined_bytecodes = 0;
113 assert(task == NULL || thread->task() == task, "sanity");
114 _task = task;
115 _log = NULL;
116
117 // Temporary buffer for creating symbols and such.
118 _name_buffer = NULL;
119 _name_buffer_len = 0;
120
121 _arena = &_ciEnv_arena;
122 _factory = new (_arena) ciObjectFactory(_arena, 128);
123
124 // Preload commonly referenced system ciObjects.
125
126 // During VM initialization, these instances have not yet been created.
127 // Assertions ensure that these instances are not accessed before
128 // their initialization.
129
130 assert(Universe::is_fully_initialized(), "should be complete");
131
132 oop o = Universe::null_ptr_exception_instance();
133 assert(o != NULL, "should have been initialized");
134 _NullPointerException_instance = get_object(o)->as_instance();
135 o = Universe::arithmetic_exception_instance();
136 assert(o != NULL, "should have been initialized");
137 _ArithmeticException_instance = get_object(o)->as_instance();
138
139 _ArrayIndexOutOfBoundsException_instance = NULL;
140 _ArrayStoreException_instance = NULL;
141 _ClassCastException_instance = NULL;
142 _the_null_string = NULL;
143 _the_min_jint_string = NULL;
144 }
145
146 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
147 ASSERT_IN_VM;
148
149 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
150 CompilerThread* current_thread = CompilerThread::current();
151 assert(current_thread->env() == NULL, "must be");
152 current_thread->set_env(this);
153 assert(ciEnv::current() == this, "sanity");
154
155 _oop_recorder = NULL;
156 _debug_info = NULL;
157 _dependencies = NULL;
158 _failure_reason = NULL;
159 _compilable = MethodCompilable_never;
160 _break_at_compile = false;
161 _compiler_data = NULL;
162 #ifndef PRODUCT
163 assert(firstEnv, "must be first");
164 firstEnv = false;
165 #endif /* !PRODUCT */
166
167 _system_dictionary_modification_counter = 0;
168 _num_inlined_bytecodes = 0;
169 _task = NULL;
170 _log = NULL;
171
172 // Temporary buffer for creating symbols and such.
173 _name_buffer = NULL;
174 _name_buffer_len = 0;
175
176 _arena = arena;
177 _factory = new (_arena) ciObjectFactory(_arena, 128);
178
179 // Preload commonly referenced system ciObjects.
180
181 // During VM initialization, these instances have not yet been created.
182 // Assertions ensure that these instances are not accessed before
183 // their initialization.
184
185 assert(Universe::is_fully_initialized(), "must be");
186
187 _NullPointerException_instance = NULL;
188 _ArithmeticException_instance = NULL;
189 _ArrayIndexOutOfBoundsException_instance = NULL;
190 _ArrayStoreException_instance = NULL;
191 _ClassCastException_instance = NULL;
192 _the_null_string = NULL;
193 _the_min_jint_string = NULL;
194 }
195
196 ciEnv::~ciEnv() {
197 CompilerThread* current_thread = CompilerThread::current();
198 _factory->remove_symbols();
199 // Need safepoint to clear the env on the thread. RedefineClasses might
200 // be reading it.
201 GUARDED_VM_ENTRY(current_thread->set_env(NULL);)
202 }
203
204 // ------------------------------------------------------------------
205 // Cache Jvmti state
206 void ciEnv::cache_jvmti_state() {
207 VM_ENTRY_MARK;
208 // Get Jvmti capabilities under lock to get consistant values.
209 MutexLocker mu(JvmtiThreadState_lock);
210 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
211 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
212 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
213 }
214
215 // ------------------------------------------------------------------
216 // Cache DTrace flags
217 void ciEnv::cache_dtrace_flags() {
218 // Need lock?
219 _dtrace_extended_probes = ExtendedDTraceProbes;
220 if (_dtrace_extended_probes) {
221 _dtrace_monitor_probes = true;
222 _dtrace_method_probes = true;
223 _dtrace_alloc_probes = true;
224 } else {
225 _dtrace_monitor_probes = DTraceMonitorProbes;
226 _dtrace_method_probes = DTraceMethodProbes;
227 _dtrace_alloc_probes = DTraceAllocProbes;
228 }
229 }
230
231 // ------------------------------------------------------------------
232 // helper for lazy exception creation
233 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
234 VM_ENTRY_MARK;
235 if (handle == NULL) {
236 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
237 Klass* k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
238 jobject objh = NULL;
239 if (!HAS_PENDING_EXCEPTION && k != NULL) {
240 oop obj = InstanceKlass::cast(k)->allocate_instance(THREAD);
241 if (!HAS_PENDING_EXCEPTION)
242 objh = JNIHandles::make_global(obj);
243 }
244 if (HAS_PENDING_EXCEPTION) {
245 CLEAR_PENDING_EXCEPTION;
246 } else {
247 handle = objh;
248 }
249 }
250 oop obj = JNIHandles::resolve(handle);
251 return obj == NULL? NULL: get_object(obj)->as_instance();
252 }
253
254 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
255 if (_ArrayIndexOutOfBoundsException_instance == NULL) {
256 _ArrayIndexOutOfBoundsException_instance
257 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
258 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
259 }
260 return _ArrayIndexOutOfBoundsException_instance;
261 }
262 ciInstance* ciEnv::ArrayStoreException_instance() {
263 if (_ArrayStoreException_instance == NULL) {
264 _ArrayStoreException_instance
265 = get_or_create_exception(_ArrayStoreException_handle,
266 vmSymbols::java_lang_ArrayStoreException());
267 }
268 return _ArrayStoreException_instance;
269 }
270 ciInstance* ciEnv::ClassCastException_instance() {
271 if (_ClassCastException_instance == NULL) {
272 _ClassCastException_instance
273 = get_or_create_exception(_ClassCastException_handle,
274 vmSymbols::java_lang_ClassCastException());
275 }
276 return _ClassCastException_instance;
277 }
278
279 ciInstance* ciEnv::the_null_string() {
280 if (_the_null_string == NULL) {
281 VM_ENTRY_MARK;
282 _the_null_string = get_object(Universe::the_null_string())->as_instance();
283 }
284 return _the_null_string;
285 }
286
287 ciInstance* ciEnv::the_min_jint_string() {
288 if (_the_min_jint_string == NULL) {
289 VM_ENTRY_MARK;
290 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
291 }
292 return _the_min_jint_string;
293 }
294
295 // ------------------------------------------------------------------
296 // ciEnv::get_method_from_handle
297 ciMethod* ciEnv::get_method_from_handle(Method* method) {
298 VM_ENTRY_MARK;
299 return get_metadata(method)->as_method();
300 }
301
302 // ------------------------------------------------------------------
303 // ciEnv::array_element_offset_in_bytes
304 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
305 VM_ENTRY_MARK;
306 objArrayOop a = (objArrayOop)a_h->get_oop();
307 assert(a->is_objArray(), "");
308 int length = a->length();
309 oop o = o_h->get_oop();
310 for (int i = 0; i < length; i++) {
311 if (a->obj_at(i) == o) return i;
312 }
313 return -1;
314 }
315
316
317 // ------------------------------------------------------------------
318 // ciEnv::check_klass_accessiblity
319 //
320 // Note: the logic of this method should mirror the logic of
321 // ConstantPool::verify_constant_pool_resolve.
322 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
323 Klass* resolved_klass) {
324 if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
325 return true;
326 }
327 if (accessing_klass->is_obj_array_klass()) {
328 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
329 }
330 if (!accessing_klass->is_instance_klass()) {
331 return true;
332 }
333
334 if (resolved_klass->oop_is_objArray()) {
335 // Find the element klass, if this is an array.
336 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
337 }
338 if (resolved_klass->oop_is_instance()) {
339 return Reflection::verify_class_access(accessing_klass->get_Klass(),
340 resolved_klass,
341 true);
342 }
343 return true;
344 }
345
346 // ------------------------------------------------------------------
347 // ciEnv::get_klass_by_name_impl
348 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
349 constantPoolHandle cpool,
350 ciSymbol* name,
351 bool require_local) {
352 ASSERT_IN_VM;
353 EXCEPTION_CONTEXT;
354
355 // Now we need to check the SystemDictionary
356 Symbol* sym = name->get_symbol();
357 if (sym->byte_at(0) == 'L' &&
358 sym->byte_at(sym->utf8_length()-1) == ';') {
359 // This is a name from a signature. Strip off the trimmings.
360 // Call recursive to keep scope of strippedsym.
361 TempNewSymbol strippedsym = SymbolTable::new_symbol(sym->as_utf8()+1,
362 sym->utf8_length()-2,
363 KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
364 ciSymbol* strippedname = get_symbol(strippedsym);
365 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
366 }
367
368 // Check for prior unloaded klass. The SystemDictionary's answers
369 // can vary over time but the compiler needs consistency.
370 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
371 if (unloaded_klass != NULL) {
372 if (require_local) return NULL;
373 return unloaded_klass;
374 }
375
376 Handle loader(THREAD, (oop)NULL);
377 Handle domain(THREAD, (oop)NULL);
378 if (accessing_klass != NULL) {
379 loader = Handle(THREAD, accessing_klass->loader());
380 domain = Handle(THREAD, accessing_klass->protection_domain());
381 }
382
383 // setup up the proper type to return on OOM
384 ciKlass* fail_type;
385 if (sym->byte_at(0) == '[') {
386 fail_type = _unloaded_ciobjarrayklass;
387 } else {
388 fail_type = _unloaded_ciinstance_klass;
389 }
390 KlassHandle found_klass;
391 {
392 ttyUnlocker ttyul; // release tty lock to avoid ordering problems
393 MutexLocker ml(Compile_lock);
394 Klass* kls;
395 if (!require_local) {
396 kls = SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
397 KILL_COMPILE_ON_FATAL_(fail_type));
398 } else {
399 kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
400 KILL_COMPILE_ON_FATAL_(fail_type));
401 }
402 found_klass = KlassHandle(THREAD, kls);
403 }
404
405 // If we fail to find an array klass, look again for its element type.
406 // The element type may be available either locally or via constraints.
407 // In either case, if we can find the element type in the system dictionary,
408 // we must build an array type around it. The CI requires array klasses
409 // to be loaded if their element klasses are loaded, except when memory
410 // is exhausted.
411 if (sym->byte_at(0) == '[' &&
412 (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
413 // We have an unloaded array.
414 // Build it on the fly if the element class exists.
415 TempNewSymbol elem_sym = SymbolTable::new_symbol(sym->as_utf8()+1,
416 sym->utf8_length()-1,
417 KILL_COMPILE_ON_FATAL_(fail_type));
418
419 // Get element ciKlass recursively.
420 ciKlass* elem_klass =
421 get_klass_by_name_impl(accessing_klass,
422 cpool,
423 get_symbol(elem_sym),
424 require_local);
425 if (elem_klass != NULL && elem_klass->is_loaded()) {
426 // Now make an array for it
427 return ciObjArrayKlass::make_impl(elem_klass);
428 }
429 }
430
431 if (found_klass() == NULL && !cpool.is_null() && cpool->has_preresolution()) {
432 // Look inside the constant pool for pre-resolved class entries.
433 for (int i = cpool->length() - 1; i >= 1; i--) {
434 if (cpool->tag_at(i).is_klass()) {
435 Klass* kls = cpool->resolved_klass_at(i);
436 if (kls->name() == sym) {
437 found_klass = KlassHandle(THREAD, kls);
438 break;
439 }
440 }
441 }
442 }
443
444 if (found_klass() != NULL) {
445 // Found it. Build a CI handle.
446 return get_klass(found_klass());
447 }
448
449 if (require_local) return NULL;
450
451 // Not yet loaded into the VM, or not governed by loader constraints.
452 // Make a CI representative for it.
453 return get_unloaded_klass(accessing_klass, name);
454 }
455
456 // ------------------------------------------------------------------
457 // ciEnv::get_klass_by_name
458 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
459 ciSymbol* klass_name,
460 bool require_local) {
461 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
462 constantPoolHandle(),
463 klass_name,
464 require_local);)
465 }
466
467 // ------------------------------------------------------------------
468 // ciEnv::get_klass_by_index_impl
469 //
470 // Implementation of get_klass_by_index.
471 ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool,
472 int index,
473 bool& is_accessible,
474 ciInstanceKlass* accessor) {
475 EXCEPTION_CONTEXT;
476 KlassHandle klass; // = NULL;
477 Symbol* klass_name = NULL;
478
479 if (cpool->tag_at(index).is_symbol()) {
480 klass_name = cpool->symbol_at(index);
481 } else {
482 // Check if it's resolved if it's not a symbol constant pool entry.
483 klass = KlassHandle(THREAD, ConstantPool::klass_at_if_loaded(cpool, index));
484
485 if (klass.is_null()) {
486 // The klass has not been inserted into the constant pool.
487 // Try to look it up by name.
488 {
489 // We have to lock the cpool to keep the oop from being resolved
490 // while we are accessing it.
491 MonitorLockerEx ml(cpool->lock());
492 constantTag tag = cpool->tag_at(index);
493 if (tag.is_klass()) {
494 // The klass has been inserted into the constant pool
495 // very recently.
496 klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
497 } else {
498 assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
499 klass_name = cpool->unresolved_klass_at(index);
500 }
501 }
502 }
503 }
504
505 if (klass.is_null()) {
506 // Not found in constant pool. Use the name to do the lookup.
507 ciKlass* k = get_klass_by_name_impl(accessor,
508 cpool,
509 get_symbol(klass_name),
510 false);
511 // Calculate accessibility the hard way.
512 if (!k->is_loaded()) {
513 is_accessible = false;
514 } else if (k->loader() != accessor->loader() &&
515 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
516 // Loaded only remotely. Not linked yet.
517 is_accessible = false;
518 } else {
519 // Linked locally, and we must also check public/private, etc.
520 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
521 }
522 return k;
523 }
524
525 // Check for prior unloaded klass. The SystemDictionary's answers
526 // can vary over time but the compiler needs consistency.
527 ciSymbol* name = get_symbol(klass()->name());
528 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
529 if (unloaded_klass != NULL) {
530 is_accessible = false;
531 return unloaded_klass;
532 }
533
534 // It is known to be accessible, since it was found in the constant pool.
535 is_accessible = true;
536 return get_klass(klass());
537 }
538
539 // ------------------------------------------------------------------
540 // ciEnv::get_klass_by_index
541 //
542 // Get a klass from the constant pool.
543 ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool,
544 int index,
545 bool& is_accessible,
546 ciInstanceKlass* accessor) {
547 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
548 }
549
550 // ------------------------------------------------------------------
551 // ciEnv::get_constant_by_index_impl
552 //
553 // Implementation of get_constant_by_index().
554 ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool,
555 int pool_index, int cache_index,
556 ciInstanceKlass* accessor) {
557 bool ignore_will_link;
558 EXCEPTION_CONTEXT;
559 int index = pool_index;
560 if (cache_index >= 0) {
561 assert(index < 0, "only one kind of index at a time");
562 oop obj = cpool->resolved_references()->obj_at(cache_index);
563 if (obj != NULL) {
564 ciObject* ciobj = get_object(obj);
565 if (ciobj->is_array()) {
566 return ciConstant(T_ARRAY, ciobj);
567 } else {
568 assert(ciobj->is_instance(), "should be an instance");
569 return ciConstant(T_OBJECT, ciobj);
570 }
571 }
572 index = cpool->object_to_cp_index(cache_index);
573 }
574 constantTag tag = cpool->tag_at(index);
575 if (tag.is_int()) {
576 return ciConstant(T_INT, (jint)cpool->int_at(index));
577 } else if (tag.is_long()) {
578 return ciConstant((jlong)cpool->long_at(index));
579 } else if (tag.is_float()) {
580 return ciConstant((jfloat)cpool->float_at(index));
581 } else if (tag.is_double()) {
582 return ciConstant((jdouble)cpool->double_at(index));
583 } else if (tag.is_string()) {
584 oop string = NULL;
585 assert(cache_index >= 0, "should have a cache index");
586 if (cpool->is_pseudo_string_at(index)) {
587 string = cpool->pseudo_string_at(index, cache_index);
588 } else {
589 string = cpool->string_at(index, cache_index, THREAD);
590 if (HAS_PENDING_EXCEPTION) {
591 CLEAR_PENDING_EXCEPTION;
592 record_out_of_memory_failure();
593 return ciConstant();
594 }
595 }
596 ciObject* constant = get_object(string);
597 if (constant->is_array()) {
598 return ciConstant(T_ARRAY, constant);
599 } else {
600 assert (constant->is_instance(), "must be an instance, or not? ");
601 return ciConstant(T_OBJECT, constant);
602 }
603 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
604 // 4881222: allow ldc to take a class type
605 ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
606 if (HAS_PENDING_EXCEPTION) {
607 CLEAR_PENDING_EXCEPTION;
608 record_out_of_memory_failure();
609 return ciConstant();
610 }
611 assert (klass->is_instance_klass() || klass->is_array_klass(),
612 "must be an instance or array klass ");
613 return ciConstant(T_OBJECT, klass->java_mirror());
614 } else if (tag.is_method_type()) {
615 // must execute Java code to link this CP entry into cache[i].f1
616 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
617 ciObject* ciobj = get_unloaded_method_type_constant(signature);
618 return ciConstant(T_OBJECT, ciobj);
619 } else if (tag.is_method_handle()) {
620 // must execute Java code to link this CP entry into cache[i].f1
621 int ref_kind = cpool->method_handle_ref_kind_at(index);
622 int callee_index = cpool->method_handle_klass_index_at(index);
623 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
624 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
625 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
626 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
627 return ciConstant(T_OBJECT, ciobj);
628 } else {
629 ShouldNotReachHere();
630 return ciConstant();
631 }
632 }
633
634 // ------------------------------------------------------------------
635 // ciEnv::get_constant_by_index
636 //
637 // Pull a constant out of the constant pool. How appropriate.
638 //
639 // Implementation note: this query is currently in no way cached.
640 ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool,
641 int pool_index, int cache_index,
642 ciInstanceKlass* accessor) {
643 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
644 }
645
646 // ------------------------------------------------------------------
647 // ciEnv::get_field_by_index_impl
648 //
649 // Implementation of get_field_by_index.
650 //
651 // Implementation note: the results of field lookups are cached
652 // in the accessor klass.
653 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
654 int index) {
655 ciConstantPoolCache* cache = accessor->field_cache();
656 if (cache == NULL) {
657 ciField* field = new (arena()) ciField(accessor, index);
658 return field;
659 } else {
660 ciField* field = (ciField*)cache->get(index);
661 if (field == NULL) {
662 field = new (arena()) ciField(accessor, index);
663 cache->insert(index, field);
664 }
665 return field;
666 }
667 }
668
669 // ------------------------------------------------------------------
670 // ciEnv::get_field_by_index
671 //
672 // Get a field by index from a klass's constant pool.
673 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
674 int index) {
675 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
676 }
677
678 // ------------------------------------------------------------------
679 // ciEnv::lookup_method
680 //
681 // Perform an appropriate method lookup based on accessor, holder,
682 // name, signature, and bytecode.
683 Method* ciEnv::lookup_method(InstanceKlass* accessor,
684 InstanceKlass* holder,
685 Symbol* name,
686 Symbol* sig,
687 Bytecodes::Code bc) {
688 EXCEPTION_CONTEXT;
689 KlassHandle h_accessor(THREAD, accessor);
690 KlassHandle h_holder(THREAD, holder);
691 LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
692 methodHandle dest_method;
693 switch (bc) {
694 case Bytecodes::_invokestatic:
695 dest_method =
696 LinkResolver::resolve_static_call_or_null(h_holder, name, sig, h_accessor);
697 break;
698 case Bytecodes::_invokespecial:
699 dest_method =
700 LinkResolver::resolve_special_call_or_null(h_holder, name, sig, h_accessor);
701 break;
702 case Bytecodes::_invokeinterface:
703 dest_method =
704 LinkResolver::linktime_resolve_interface_method_or_null(h_holder, name, sig,
705 h_accessor, true);
706 break;
707 case Bytecodes::_invokevirtual:
708 dest_method =
709 LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, name, sig,
710 h_accessor, true);
711 break;
712 default: ShouldNotReachHere();
713 }
714
715 return dest_method();
716 }
717
718
719 // ------------------------------------------------------------------
720 // ciEnv::get_method_by_index_impl
721 ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool,
722 int index, Bytecodes::Code bc,
723 ciInstanceKlass* accessor) {
724 if (bc == Bytecodes::_invokedynamic) {
725 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
726 bool is_resolved = !cpce->is_f1_null();
727 // FIXME: code generation could allow for null (unlinked) call site
728 // The call site could be made patchable as follows:
729 // Load the appendix argument from the constant pool.
730 // Test the appendix argument and jump to a known deopt routine if it is null.
731 // Jump through a patchable call site, which is initially a deopt routine.
732 // Patch the call site to the nmethod entry point of the static compiled lambda form.
733 // As with other two-component call sites, both values must be independently verified.
734
735 if (is_resolved) {
736 // Get the invoker Method* from the constant pool.
737 // (The appendix argument, if any, will be noted in the method's signature.)
738 Method* adapter = cpce->f1_as_method();
739 return get_method(adapter);
740 }
741
742 // Fake a method that is equivalent to a declared method.
743 ciInstanceKlass* holder = get_instance_klass(SystemDictionary::MethodHandle_klass());
744 ciSymbol* name = ciSymbol::invokeBasic_name();
745 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index));
746 return get_unloaded_method(holder, name, signature, accessor);
747 } else {
748 const int holder_index = cpool->klass_ref_index_at(index);
749 bool holder_is_accessible;
750 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
751 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
752
753 // Get the method's name and signature.
754 Symbol* name_sym = cpool->name_ref_at(index);
755 Symbol* sig_sym = cpool->signature_ref_at(index);
756
757 if (cpool->has_preresolution()
758 || (holder == ciEnv::MethodHandle_klass() &&
759 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
760 // Short-circuit lookups for JSR 292-related call sites.
761 // That is, do not rely only on name-based lookups, because they may fail
762 // if the names are not resolvable in the boot class loader (7056328).
763 switch (bc) {
764 case Bytecodes::_invokevirtual:
765 case Bytecodes::_invokeinterface:
766 case Bytecodes::_invokespecial:
767 case Bytecodes::_invokestatic:
768 {
769 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
770 if (m != NULL) {
771 return get_method(m);
772 }
773 }
774 break;
775 }
776 }
777
778 if (holder_is_accessible) { // Our declared holder is loaded.
779 InstanceKlass* lookup = declared_holder->get_instanceKlass();
780 Method* m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
781 if (m != NULL &&
782 (bc == Bytecodes::_invokestatic
783 ? m->method_holder()->is_not_initialized()
784 : !m->method_holder()->is_loaded())) {
785 m = NULL;
786 }
787 #ifdef ASSERT
788 if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
789 m = NULL;
790 }
791 #endif
792 if (m != NULL) {
793 // We found the method.
794 return get_method(m);
795 }
796 }
797
798 // Either the declared holder was not loaded, or the method could
799 // not be found. Create a dummy ciMethod to represent the failed
800 // lookup.
801 ciSymbol* name = get_symbol(name_sym);
802 ciSymbol* signature = get_symbol(sig_sym);
803 return get_unloaded_method(declared_holder, name, signature, accessor);
804 }
805 }
806
807
808 // ------------------------------------------------------------------
809 // ciEnv::get_instance_klass_for_declared_method_holder
810 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
811 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
812 // instead of a ciInstanceKlass. For that case simply pretend that the
813 // declared holder is Object.clone since that's where the call will bottom out.
814 // A more correct fix would trickle out through many interfaces in CI,
815 // requiring ciInstanceKlass* to become ciKlass* and many more places would
816 // require checks to make sure the expected type was found. Given that this
817 // only occurs for clone() the more extensive fix seems like overkill so
818 // instead we simply smear the array type into Object.
819 guarantee(method_holder != NULL, "no method holder");
820 if (method_holder->is_instance_klass()) {
821 return method_holder->as_instance_klass();
822 } else if (method_holder->is_array_klass()) {
823 return current()->Object_klass();
824 } else {
825 ShouldNotReachHere();
826 }
827 return NULL;
828 }
829
830
831 // ------------------------------------------------------------------
832 // ciEnv::get_method_by_index
833 ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool,
834 int index, Bytecodes::Code bc,
835 ciInstanceKlass* accessor) {
836 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
837 }
838
839
840 // ------------------------------------------------------------------
841 // ciEnv::name_buffer
842 char *ciEnv::name_buffer(int req_len) {
843 if (_name_buffer_len < req_len) {
844 if (_name_buffer == NULL) {
845 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
846 _name_buffer_len = req_len;
847 } else {
848 _name_buffer =
849 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
850 _name_buffer_len = req_len;
851 }
852 }
853 return _name_buffer;
854 }
855
856 // ------------------------------------------------------------------
857 // ciEnv::is_in_vm
858 bool ciEnv::is_in_vm() {
859 return JavaThread::current()->thread_state() == _thread_in_vm;
860 }
861
862 bool ciEnv::system_dictionary_modification_counter_changed() {
863 return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
864 }
865
866 // ------------------------------------------------------------------
867 // ciEnv::validate_compile_task_dependencies
868 //
869 // Check for changes during compilation (e.g. class loads, evolution,
870 // breakpoints, call site invalidation).
871 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
872 if (failing()) return; // no need for further checks
873
874 // First, check non-klass dependencies as we might return early and
875 // not check klass dependencies if the system dictionary
876 // modification counter hasn't changed (see below).
877 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
878 if (deps.is_klass_type()) continue; // skip klass dependencies
879 Klass* witness = deps.check_dependency();
880 if (witness != NULL) {
881 record_failure("invalid non-klass dependency");
882 return;
883 }
884 }
885
886 // Klass dependencies must be checked when the system dictionary
887 // changes. If logging is enabled all violated dependences will be
888 // recorded in the log. In debug mode check dependencies even if
889 // the system dictionary hasn't changed to verify that no invalid
890 // dependencies were inserted. Any violated dependences in this
891 // case are dumped to the tty.
892 bool counter_changed = system_dictionary_modification_counter_changed();
893
894 bool verify_deps = trueInDebug;
895 if (!counter_changed && !verify_deps) return;
896
897 int klass_violations = 0;
898 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
899 if (!deps.is_klass_type()) continue; // skip non-klass dependencies
900 Klass* witness = deps.check_dependency();
901 if (witness != NULL) {
902 klass_violations++;
903 if (!counter_changed) {
904 // Dependence failed but counter didn't change. Log a message
905 // describing what failed and allow the assert at the end to
906 // trigger.
907 deps.print_dependency(witness);
908 } else if (xtty == NULL) {
909 // If we're not logging then a single violation is sufficient,
910 // otherwise we want to log all the dependences which were
911 // violated.
912 break;
913 }
914 }
915 }
916
917 if (klass_violations != 0) {
918 #ifdef ASSERT
919 if (!counter_changed && !PrintCompilation) {
920 // Print out the compile task that failed
921 _task->print_line();
922 }
923 #endif
924 assert(counter_changed, "failed dependencies, but counter didn't change");
925 record_failure("concurrent class loading");
926 }
927 }
928
929 // ------------------------------------------------------------------
930 // ciEnv::register_method
931 void ciEnv::register_method(ciMethod* target,
932 int entry_bci,
933 CodeOffsets* offsets,
934 int orig_pc_offset,
935 CodeBuffer* code_buffer,
936 int frame_words,
937 OopMapSet* oop_map_set,
938 ExceptionHandlerTable* handler_table,
939 ImplicitExceptionTable* inc_table,
940 AbstractCompiler* compiler,
941 int comp_level,
942 bool has_unsafe_access,
943 bool has_wide_vectors,
944 RTMState rtm_state) {
945 VM_ENTRY_MARK;
946 nmethod* nm = NULL;
947 {
948 // To prevent compile queue updates.
949 MutexLocker locker(MethodCompileQueue_lock, THREAD);
950
951 // Prevent SystemDictionary::add_to_hierarchy from running
952 // and invalidating our dependencies until we install this method.
953 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
954 MutexLocker ml(Compile_lock);
955 No_Safepoint_Verifier nsv;
956
957 // Change in Jvmti state may invalidate compilation.
958 if (!failing() &&
959 ( (!jvmti_can_hotswap_or_post_breakpoint() &&
960 JvmtiExport::can_hotswap_or_post_breakpoint()) ||
961 (!jvmti_can_access_local_variables() &&
962 JvmtiExport::can_access_local_variables()) ||
963 (!jvmti_can_post_on_exceptions() &&
964 JvmtiExport::can_post_on_exceptions()) )) {
965 record_failure("Jvmti state change invalidated dependencies");
966 }
967
968 // Change in DTrace flags may invalidate compilation.
969 if (!failing() &&
970 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
971 (!dtrace_method_probes() && DTraceMethodProbes) ||
972 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
973 record_failure("DTrace flags change invalidated dependencies");
974 }
975
976 if (!failing()) {
977 if (log() != NULL) {
978 // Log the dependencies which this compilation declares.
979 dependencies()->log_all_dependencies();
980 }
981
982 // Encode the dependencies now, so we can check them right away.
983 dependencies()->encode_content_bytes();
984
985 // Check for {class loads, evolution, breakpoints, ...} during compilation
986 validate_compile_task_dependencies(target);
987 }
988
989 methodHandle method(THREAD, target->get_Method());
990
991 #if INCLUDE_RTM_OPT
992 if (!failing() && (rtm_state != NoRTM) &&
993 (method()->method_data() != NULL) &&
994 (method()->method_data()->rtm_state() != rtm_state)) {
995 // Preemptive decompile if rtm state was changed.
996 record_failure("RTM state change invalidated rtm code");
997 }
998 #endif
999
1000 if (failing()) {
1001 // While not a true deoptimization, it is a preemptive decompile.
1002 MethodData* mdo = method()->method_data();
1003 if (mdo != NULL) {
1004 mdo->inc_decompile_count();
1005 }
1006
1007 // All buffers in the CodeBuffer are allocated in the CodeCache.
1008 // If the code buffer is created on each compile attempt
1009 // as in C2, then it must be freed.
1010 code_buffer->free_blob();
1011 return;
1012 }
1013
1014 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1015 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1016
1017 nm = nmethod::new_nmethod(method,
1018 compile_id(),
1019 entry_bci,
1020 offsets,
1021 orig_pc_offset,
1022 debug_info(), dependencies(), code_buffer,
1023 frame_words, oop_map_set,
1024 handler_table, inc_table,
1025 compiler, comp_level);
1026 // Free codeBlobs
1027 code_buffer->free_blob();
1028
1029 if (nm != NULL) {
1030 nm->set_has_unsafe_access(has_unsafe_access);
1031 nm->set_has_wide_vectors(has_wide_vectors);
1032 #if INCLUDE_RTM_OPT
1033 nm->set_rtm_state(rtm_state);
1034 #endif
1035
1036 // Record successful registration.
1037 // (Put nm into the task handle *before* publishing to the Java heap.)
1038 if (task() != NULL) {
1039 task()->set_code(nm);
1040 }
1041
1042 if (entry_bci == InvocationEntryBci) {
1043 if (TieredCompilation) {
1044 // If there is an old version we're done with it
1045 nmethod* old = method->code();
1046 if (TraceMethodReplacement && old != NULL) {
1047 ResourceMark rm;
1048 char *method_name = method->name_and_sig_as_C_string();
1049 tty->print_cr("Replacing method %s", method_name);
1050 }
1051 if (old != NULL) {
1052 old->make_not_entrant();
1053 }
1054 }
1055 if (TraceNMethodInstalls) {
1056 ResourceMark rm;
1057 char *method_name = method->name_and_sig_as_C_string();
1058 ttyLocker ttyl;
1059 tty->print_cr("Installing method (%d) %s ",
1060 comp_level,
1061 method_name);
1062 }
1063 // Allow the code to be executed
1064 method->set_code(method, nm);
1065 } else {
1066 if (TraceNMethodInstalls) {
1067 ResourceMark rm;
1068 char *method_name = method->name_and_sig_as_C_string();
1069 ttyLocker ttyl;
1070 tty->print_cr("Installing osr method (%d) %s @ %d",
1071 comp_level,
1072 method_name,
1073 entry_bci);
1074 }
1075 method->method_holder()->add_osr_nmethod(nm);
1076 }
1077 }
1078 } // safepoints are allowed again
1079
1080 if (nm != NULL) {
1081 // JVMTI -- compiled method notification (must be done outside lock)
1082 nm->post_compiled_method_load_event();
1083 } else {
1084 // The CodeCache is full. Print out warning and disable compilation.
1085 record_failure("code cache is full");
1086 CompileBroker::handle_full_code_cache();
1087 }
1088 }
1089
1090
1091 // ------------------------------------------------------------------
1092 // ciEnv::find_system_klass
1093 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1094 VM_ENTRY_MARK;
1095 return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false);
1096 }
1097
1098 // ------------------------------------------------------------------
1099 // ciEnv::comp_level
1100 int ciEnv::comp_level() {
1101 if (task() == NULL) return CompLevel_highest_tier;
1102 return task()->comp_level();
1103 }
1104
1105 // ------------------------------------------------------------------
1106 // ciEnv::compile_id
1107 uint ciEnv::compile_id() {
1108 if (task() == NULL) return 0;
1109 return task()->compile_id();
1110 }
1111
1112 // ------------------------------------------------------------------
1113 // ciEnv::notice_inlined_method()
1114 void ciEnv::notice_inlined_method(ciMethod* method) {
1115 _num_inlined_bytecodes += method->code_size_for_inlining();
1116 }
1117
1118 // ------------------------------------------------------------------
1119 // ciEnv::num_inlined_bytecodes()
1120 int ciEnv::num_inlined_bytecodes() const {
1121 return _num_inlined_bytecodes;
1122 }
1123
1124 // ------------------------------------------------------------------
1125 // ciEnv::record_failure()
1126 void ciEnv::record_failure(const char* reason) {
1127 if (_failure_reason == NULL) {
1128 // Record the first failure reason.
1129 _failure_reason = reason;
1130 }
1131 }
1132
1133 // ------------------------------------------------------------------
1134 // ciEnv::record_method_not_compilable()
1135 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1136 int new_compilable =
1137 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1138
1139 // Only note transitions to a worse state
1140 if (new_compilable > _compilable) {
1141 if (log() != NULL) {
1142 if (all_tiers) {
1143 log()->elem("method_not_compilable");
1144 } else {
1145 log()->elem("method_not_compilable_at_tier level='%d'",
1146 current()->task()->comp_level());
1147 }
1148 }
1149 _compilable = new_compilable;
1150
1151 // Reset failure reason; this one is more important.
1152 _failure_reason = NULL;
1153 record_failure(reason);
1154 }
1155 }
1156
1157 // ------------------------------------------------------------------
1158 // ciEnv::record_out_of_memory_failure()
1159 void ciEnv::record_out_of_memory_failure() {
1160 // If memory is low, we stop compiling methods.
1161 record_method_not_compilable("out of memory");
1162 }
1163
1164 ciInstance* ciEnv::unloaded_ciinstance() {
1165 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1166 }
1167
1168 // ------------------------------------------------------------------
1169 // ciEnv::dump_replay_data*
1170
1171 // Don't change thread state and acquire any locks.
1172 // Safe to call from VM error reporter.
1173
1174 void ciEnv::dump_compile_data(outputStream* out) {
1175 CompileTask* task = this->task();
1176 Method* method = task->method();
1177 int entry_bci = task->osr_bci();
1178 int comp_level = task->comp_level();
1179 out->print("compile %s %s %s %d %d",
1180 method->klass_name()->as_quoted_ascii(),
1181 method->name()->as_quoted_ascii(),
1182 method->signature()->as_quoted_ascii(),
1183 entry_bci, comp_level);
1184 if (compiler_data() != NULL) {
1185 if (is_c2_compile(comp_level)) { // C2 or Shark
1186 #ifdef COMPILER2
1187 // Dump C2 inlining data.
1188 ((Compile*)compiler_data())->dump_inline_data(out);
1189 #endif
1190 } else if (is_c1_compile(comp_level)) { // C1
1191 #ifdef COMPILER1
1192 // Dump C1 inlining data.
1193 ((Compilation*)compiler_data())->dump_inline_data(out);
1194 #endif
1195 }
1196 }
1197 out->cr();
1198 }
1199
1200 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1201 ResourceMark rm;
1202 #if INCLUDE_JVMTI
1203 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1204 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1205 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1206 #endif // INCLUDE_JVMTI
1207
1208 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1209 out->print_cr("# %d ciObject found", objects->length());
1210 for (int i = 0; i < objects->length(); i++) {
1211 objects->at(i)->dump_replay_data(out);
1212 }
1213 dump_compile_data(out);
1214 out->flush();
1215 }
1216
1217 void ciEnv::dump_replay_data(outputStream* out) {
1218 GUARDED_VM_ENTRY(
1219 MutexLocker ml(Compile_lock);
1220 dump_replay_data_unsafe(out);
1221 )
1222 }
1223
1224 void ciEnv::dump_replay_data(int compile_id) {
1225 static char buffer[O_BUFLEN];
1226 int ret = jio_snprintf(buffer, O_BUFLEN, "replay_pid%p_compid%d.log", os::current_process_id(), compile_id);
1227 if (ret > 0) {
1228 int fd = open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1229 if (fd != -1) {
1230 FILE* replay_data_file = os::open(fd, "w");
1231 if (replay_data_file != NULL) {
1232 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1233 dump_replay_data(&replay_data_stream);
1234 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1235 } else {
1236 tty->print_cr("# Can't open file to dump replay data.");
1237 }
1238 }
1239 }
1240 }
1241
1242 void ciEnv::dump_inline_data(int compile_id) {
1243 static char buffer[O_BUFLEN];
1244 int ret = jio_snprintf(buffer, O_BUFLEN, "inline_pid%p_compid%d.log", os::current_process_id(), compile_id);
1245 if (ret > 0) {
1246 int fd = open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1247 if (fd != -1) {
1248 FILE* inline_data_file = os::open(fd, "w");
1249 if (inline_data_file != NULL) {
1250 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1251 GUARDED_VM_ENTRY(
1252 MutexLocker ml(Compile_lock);
1253 dump_compile_data(&replay_data_stream);
1254 )
1255 replay_data_stream.flush();
1256 tty->print("# Compiler inline data is saved as: ");
1257 tty->print_cr("%s", buffer);
1258 } else {
1259 tty->print_cr("# Can't open file to dump inline data.");
1260 }
1261 }
1262 }
1263 }