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src/share/vm/ci/ciEnv.cpp@fb57d4cf76c2
src/share/vm/ci/ciEnv.cpp
Tue, 11 May 2010 14:35:43 -0700
- author
- prr
- date
- Tue, 11 May 2010 14:35:43 -0700
- changeset 1840
- fb57d4cf76c2
- parent 1832
- b4776199210f
- child 1862
- cd5dbf694d45
- permissions
- -rw-r--r--
6931180: Migration to recent versions of MS Platform SDK
6951582: Build problems on win64
Summary: Changes to enable building JDK7 with Microsoft Visual Studio 2010
Reviewed-by: ohair, art, ccheung, dcubed
1 /*
2 * Copyright 1999-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_ciEnv.cpp.incl"
28 // ciEnv
29 //
30 // This class is the top level broker for requests from the compiler
31 // to the VM.
33 ciObject* ciEnv::_null_object_instance;
34 ciMethodKlass* ciEnv::_method_klass_instance;
35 ciSymbolKlass* ciEnv::_symbol_klass_instance;
36 ciKlassKlass* ciEnv::_klass_klass_instance;
37 ciInstanceKlassKlass* ciEnv::_instance_klass_klass_instance;
38 ciTypeArrayKlassKlass* ciEnv::_type_array_klass_klass_instance;
39 ciObjArrayKlassKlass* ciEnv::_obj_array_klass_klass_instance;
41 #define WK_KLASS_DEFN(name, ignore_s, ignore_o) ciInstanceKlass* ciEnv::_##name = NULL;
42 WK_KLASSES_DO(WK_KLASS_DEFN)
43 #undef WK_KLASS_DEFN
45 ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
46 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
47 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
49 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
50 jobject ciEnv::_ArrayStoreException_handle = NULL;
51 jobject ciEnv::_ClassCastException_handle = NULL;
53 #ifndef PRODUCT
54 static bool firstEnv = true;
55 #endif /* PRODUCT */
57 // ------------------------------------------------------------------
58 // ciEnv::ciEnv
59 ciEnv::ciEnv(CompileTask* task, int system_dictionary_modification_counter) {
60 VM_ENTRY_MARK;
62 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
63 thread->set_env(this);
64 assert(ciEnv::current() == this, "sanity");
66 _oop_recorder = NULL;
67 _debug_info = NULL;
68 _dependencies = NULL;
69 _failure_reason = NULL;
70 _compilable = MethodCompilable;
71 _break_at_compile = false;
72 _compiler_data = NULL;
73 #ifndef PRODUCT
74 assert(!firstEnv, "not initialized properly");
75 #endif /* !PRODUCT */
77 _system_dictionary_modification_counter = system_dictionary_modification_counter;
78 _num_inlined_bytecodes = 0;
79 assert(task == NULL || thread->task() == task, "sanity");
80 _task = task;
81 _log = NULL;
83 // Temporary buffer for creating symbols and such.
84 _name_buffer = NULL;
85 _name_buffer_len = 0;
87 _arena = &_ciEnv_arena;
88 _factory = new (_arena) ciObjectFactory(_arena, 128);
90 // Preload commonly referenced system ciObjects.
92 // During VM initialization, these instances have not yet been created.
93 // Assertions ensure that these instances are not accessed before
94 // their initialization.
96 assert(Universe::is_fully_initialized(), "should be complete");
98 oop o = Universe::null_ptr_exception_instance();
99 assert(o != NULL, "should have been initialized");
100 _NullPointerException_instance = get_object(o)->as_instance();
101 o = Universe::arithmetic_exception_instance();
102 assert(o != NULL, "should have been initialized");
103 _ArithmeticException_instance = get_object(o)->as_instance();
105 _ArrayIndexOutOfBoundsException_instance = NULL;
106 _ArrayStoreException_instance = NULL;
107 _ClassCastException_instance = NULL;
108 _the_null_string = NULL;
109 _the_min_jint_string = NULL;
110 }
112 ciEnv::ciEnv(Arena* arena) {
113 ASSERT_IN_VM;
115 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
116 CompilerThread* current_thread = CompilerThread::current();
117 assert(current_thread->env() == NULL, "must be");
118 current_thread->set_env(this);
119 assert(ciEnv::current() == this, "sanity");
121 _oop_recorder = NULL;
122 _debug_info = NULL;
123 _dependencies = NULL;
124 _failure_reason = NULL;
125 _compilable = MethodCompilable_never;
126 _break_at_compile = false;
127 _compiler_data = NULL;
128 #ifndef PRODUCT
129 assert(firstEnv, "must be first");
130 firstEnv = false;
131 #endif /* !PRODUCT */
133 _system_dictionary_modification_counter = 0;
134 _num_inlined_bytecodes = 0;
135 _task = NULL;
136 _log = NULL;
138 // Temporary buffer for creating symbols and such.
139 _name_buffer = NULL;
140 _name_buffer_len = 0;
142 _arena = arena;
143 _factory = new (_arena) ciObjectFactory(_arena, 128);
145 // Preload commonly referenced system ciObjects.
147 // During VM initialization, these instances have not yet been created.
148 // Assertions ensure that these instances are not accessed before
149 // their initialization.
151 assert(Universe::is_fully_initialized(), "must be");
153 oop o = Universe::null_ptr_exception_instance();
154 assert(o != NULL, "should have been initialized");
155 _NullPointerException_instance = get_object(o)->as_instance();
156 o = Universe::arithmetic_exception_instance();
157 assert(o != NULL, "should have been initialized");
158 _ArithmeticException_instance = get_object(o)->as_instance();
160 _ArrayIndexOutOfBoundsException_instance = NULL;
161 _ArrayStoreException_instance = NULL;
162 _ClassCastException_instance = NULL;
163 _the_null_string = NULL;
164 _the_min_jint_string = NULL;
165 }
167 ciEnv::~ciEnv() {
168 CompilerThread* current_thread = CompilerThread::current();
169 current_thread->set_env(NULL);
170 }
172 // ------------------------------------------------------------------
173 // Cache Jvmti state
174 void ciEnv::cache_jvmti_state() {
175 VM_ENTRY_MARK;
176 // Get Jvmti capabilities under lock to get consistant values.
177 MutexLocker mu(JvmtiThreadState_lock);
178 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
179 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
180 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
181 }
183 // ------------------------------------------------------------------
184 // Cache DTrace flags
185 void ciEnv::cache_dtrace_flags() {
186 // Need lock?
187 _dtrace_extended_probes = ExtendedDTraceProbes;
188 if (_dtrace_extended_probes) {
189 _dtrace_monitor_probes = true;
190 _dtrace_method_probes = true;
191 _dtrace_alloc_probes = true;
192 } else {
193 _dtrace_monitor_probes = DTraceMonitorProbes;
194 _dtrace_method_probes = DTraceMethodProbes;
195 _dtrace_alloc_probes = DTraceAllocProbes;
196 }
197 }
199 // ------------------------------------------------------------------
200 // helper for lazy exception creation
201 ciInstance* ciEnv::get_or_create_exception(jobject& handle, symbolHandle name) {
202 VM_ENTRY_MARK;
203 if (handle == NULL) {
204 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
205 klassOop k = SystemDictionary::find(name, Handle(), Handle(), THREAD);
206 jobject objh = NULL;
207 if (!HAS_PENDING_EXCEPTION && k != NULL) {
208 oop obj = instanceKlass::cast(k)->allocate_permanent_instance(THREAD);
209 if (!HAS_PENDING_EXCEPTION)
210 objh = JNIHandles::make_global(obj);
211 }
212 if (HAS_PENDING_EXCEPTION) {
213 CLEAR_PENDING_EXCEPTION;
214 } else {
215 handle = objh;
216 }
217 }
218 oop obj = JNIHandles::resolve(handle);
219 return obj == NULL? NULL: get_object(obj)->as_instance();
220 }
222 // ------------------------------------------------------------------
223 // ciEnv::ArrayIndexOutOfBoundsException_instance, etc.
224 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
225 if (_ArrayIndexOutOfBoundsException_instance == NULL) {
226 _ArrayIndexOutOfBoundsException_instance
227 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
228 vmSymbolHandles::java_lang_ArrayIndexOutOfBoundsException());
229 }
230 return _ArrayIndexOutOfBoundsException_instance;
231 }
232 ciInstance* ciEnv::ArrayStoreException_instance() {
233 if (_ArrayStoreException_instance == NULL) {
234 _ArrayStoreException_instance
235 = get_or_create_exception(_ArrayStoreException_handle,
236 vmSymbolHandles::java_lang_ArrayStoreException());
237 }
238 return _ArrayStoreException_instance;
239 }
240 ciInstance* ciEnv::ClassCastException_instance() {
241 if (_ClassCastException_instance == NULL) {
242 _ClassCastException_instance
243 = get_or_create_exception(_ClassCastException_handle,
244 vmSymbolHandles::java_lang_ClassCastException());
245 }
246 return _ClassCastException_instance;
247 }
249 ciInstance* ciEnv::the_null_string() {
250 if (_the_null_string == NULL) {
251 VM_ENTRY_MARK;
252 _the_null_string = get_object(Universe::the_null_string())->as_instance();
253 }
254 return _the_null_string;
255 }
257 ciInstance* ciEnv::the_min_jint_string() {
258 if (_the_min_jint_string == NULL) {
259 VM_ENTRY_MARK;
260 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
261 }
262 return _the_min_jint_string;
263 }
265 // ------------------------------------------------------------------
266 // ciEnv::get_method_from_handle
267 ciMethod* ciEnv::get_method_from_handle(jobject method) {
268 VM_ENTRY_MARK;
269 return get_object(JNIHandles::resolve(method))->as_method();
270 }
272 // ------------------------------------------------------------------
273 // ciEnv::make_array
274 ciArray* ciEnv::make_system_array(GrowableArray<ciObject*>* objects) {
275 VM_ENTRY_MARK;
276 int length = objects->length();
277 objArrayOop a = oopFactory::new_system_objArray(length, THREAD);
278 if (HAS_PENDING_EXCEPTION) {
279 CLEAR_PENDING_EXCEPTION;
280 record_out_of_memory_failure();
281 return NULL;
282 }
283 for (int i = 0; i < length; i++) {
284 a->obj_at_put(i, objects->at(i)->get_oop());
285 }
286 assert(a->is_perm(), "");
287 return get_object(a)->as_array();
288 }
291 // ------------------------------------------------------------------
292 // ciEnv::array_element_offset_in_bytes
293 int ciEnv::array_element_offset_in_bytes(ciArray* a_h, ciObject* o_h) {
294 VM_ENTRY_MARK;
295 objArrayOop a = (objArrayOop)a_h->get_oop();
296 assert(a->is_objArray(), "");
297 int length = a->length();
298 oop o = o_h->get_oop();
299 for (int i = 0; i < length; i++) {
300 if (a->obj_at(i) == o) return i;
301 }
302 return -1;
303 }
306 // ------------------------------------------------------------------
307 // ciEnv::check_klass_accessiblity
308 //
309 // Note: the logic of this method should mirror the logic of
310 // constantPoolOopDesc::verify_constant_pool_resolve.
311 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
312 klassOop resolved_klass) {
313 if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
314 return true;
315 }
316 if (accessing_klass->is_obj_array()) {
317 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
318 }
319 if (!accessing_klass->is_instance_klass()) {
320 return true;
321 }
323 if (resolved_klass->klass_part()->oop_is_objArray()) {
324 // Find the element klass, if this is an array.
325 resolved_klass = objArrayKlass::cast(resolved_klass)->bottom_klass();
326 }
327 if (resolved_klass->klass_part()->oop_is_instance()) {
328 return Reflection::verify_class_access(accessing_klass->get_klassOop(),
329 resolved_klass,
330 true);
331 }
332 return true;
333 }
335 // ------------------------------------------------------------------
336 // ciEnv::get_klass_by_name_impl
337 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
338 ciSymbol* name,
339 bool require_local) {
340 ASSERT_IN_VM;
341 EXCEPTION_CONTEXT;
343 // Now we need to check the SystemDictionary
344 symbolHandle sym(THREAD, name->get_symbolOop());
345 if (sym->byte_at(0) == 'L' &&
346 sym->byte_at(sym->utf8_length()-1) == ';') {
347 // This is a name from a signature. Strip off the trimmings.
348 sym = oopFactory::new_symbol_handle(sym->as_utf8()+1,
349 sym->utf8_length()-2,
350 KILL_COMPILE_ON_FATAL_(_unloaded_ciinstance_klass));
351 name = get_object(sym())->as_symbol();
352 }
354 // Check for prior unloaded klass. The SystemDictionary's answers
355 // can vary over time but the compiler needs consistency.
356 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
357 if (unloaded_klass != NULL) {
358 if (require_local) return NULL;
359 return unloaded_klass;
360 }
362 Handle loader(THREAD, (oop)NULL);
363 Handle domain(THREAD, (oop)NULL);
364 if (accessing_klass != NULL) {
365 loader = Handle(THREAD, accessing_klass->loader());
366 domain = Handle(THREAD, accessing_klass->protection_domain());
367 }
369 // setup up the proper type to return on OOM
370 ciKlass* fail_type;
371 if (sym->byte_at(0) == '[') {
372 fail_type = _unloaded_ciobjarrayklass;
373 } else {
374 fail_type = _unloaded_ciinstance_klass;
375 }
376 klassOop found_klass;
377 if (!require_local) {
378 found_klass =
379 SystemDictionary::find_constrained_instance_or_array_klass(sym, loader,
380 KILL_COMPILE_ON_FATAL_(fail_type));
381 } else {
382 found_klass =
383 SystemDictionary::find_instance_or_array_klass(sym, loader, domain,
384 KILL_COMPILE_ON_FATAL_(fail_type));
385 }
387 // If we fail to find an array klass, look again for its element type.
388 // The element type may be available either locally or via constraints.
389 // In either case, if we can find the element type in the system dictionary,
390 // we must build an array type around it. The CI requires array klasses
391 // to be loaded if their element klasses are loaded, except when memory
392 // is exhausted.
393 if (sym->byte_at(0) == '[' &&
394 (sym->byte_at(1) == '[' || sym->byte_at(1) == 'L')) {
395 // We have an unloaded array.
396 // Build it on the fly if the element class exists.
397 symbolOop elem_sym = oopFactory::new_symbol(sym->as_utf8()+1,
398 sym->utf8_length()-1,
399 KILL_COMPILE_ON_FATAL_(fail_type));
400 // Get element ciKlass recursively.
401 ciKlass* elem_klass =
402 get_klass_by_name_impl(accessing_klass,
403 get_object(elem_sym)->as_symbol(),
404 require_local);
405 if (elem_klass != NULL && elem_klass->is_loaded()) {
406 // Now make an array for it
407 return ciObjArrayKlass::make_impl(elem_klass);
408 }
409 }
411 if (found_klass != NULL) {
412 // Found it. Build a CI handle.
413 return get_object(found_klass)->as_klass();
414 }
416 if (require_local) return NULL;
417 // Not yet loaded into the VM, or not governed by loader constraints.
418 // Make a CI representative for it.
419 return get_unloaded_klass(accessing_klass, name);
420 }
422 // ------------------------------------------------------------------
423 // ciEnv::get_klass_by_name
424 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
425 ciSymbol* klass_name,
426 bool require_local) {
427 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
428 klass_name,
429 require_local);)
430 }
432 // ------------------------------------------------------------------
433 // ciEnv::get_klass_by_index_impl
434 //
435 // Implementation of get_klass_by_index.
436 ciKlass* ciEnv::get_klass_by_index_impl(constantPoolHandle cpool,
437 int index,
438 bool& is_accessible,
439 ciInstanceKlass* accessor) {
440 EXCEPTION_CONTEXT;
441 KlassHandle klass (THREAD, constantPoolOopDesc::klass_at_if_loaded(cpool, index));
442 symbolHandle klass_name;
443 if (klass.is_null()) {
444 // The klass has not been inserted into the constant pool.
445 // Try to look it up by name.
446 {
447 // We have to lock the cpool to keep the oop from being resolved
448 // while we are accessing it.
449 ObjectLocker ol(cpool, THREAD);
451 constantTag tag = cpool->tag_at(index);
452 if (tag.is_klass()) {
453 // The klass has been inserted into the constant pool
454 // very recently.
455 klass = KlassHandle(THREAD, cpool->resolved_klass_at(index));
456 } else if (tag.is_symbol()) {
457 klass_name = symbolHandle(THREAD, cpool->symbol_at(index));
458 } else {
459 assert(cpool->tag_at(index).is_unresolved_klass(), "wrong tag");
460 klass_name = symbolHandle(THREAD, cpool->unresolved_klass_at(index));
461 }
462 }
463 }
465 if (klass.is_null()) {
466 // Not found in constant pool. Use the name to do the lookup.
467 ciKlass* k = get_klass_by_name_impl(accessor,
468 get_object(klass_name())->as_symbol(),
469 false);
470 // Calculate accessibility the hard way.
471 if (!k->is_loaded()) {
472 is_accessible = false;
473 } else if (k->loader() != accessor->loader() &&
474 get_klass_by_name_impl(accessor, k->name(), true) == NULL) {
475 // Loaded only remotely. Not linked yet.
476 is_accessible = false;
477 } else {
478 // Linked locally, and we must also check public/private, etc.
479 is_accessible = check_klass_accessibility(accessor, k->get_klassOop());
480 }
481 return k;
482 }
484 // Check for prior unloaded klass. The SystemDictionary's answers
485 // can vary over time but the compiler needs consistency.
486 ciSymbol* name = get_object(klass()->klass_part()->name())->as_symbol();
487 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
488 if (unloaded_klass != NULL) {
489 is_accessible = false;
490 return unloaded_klass;
491 }
493 // It is known to be accessible, since it was found in the constant pool.
494 is_accessible = true;
495 return get_object(klass())->as_klass();
496 }
498 // ------------------------------------------------------------------
499 // ciEnv::get_klass_by_index
500 //
501 // Get a klass from the constant pool.
502 ciKlass* ciEnv::get_klass_by_index(constantPoolHandle cpool,
503 int index,
504 bool& is_accessible,
505 ciInstanceKlass* accessor) {
506 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
507 }
509 // ------------------------------------------------------------------
510 // ciEnv::get_constant_by_index_impl
511 //
512 // Implementation of get_constant_by_index().
513 ciConstant ciEnv::get_constant_by_index_impl(constantPoolHandle cpool,
514 int index,
515 ciInstanceKlass* accessor) {
516 EXCEPTION_CONTEXT;
517 constantTag tag = cpool->tag_at(index);
518 if (tag.is_int()) {
519 return ciConstant(T_INT, (jint)cpool->int_at(index));
520 } else if (tag.is_long()) {
521 return ciConstant((jlong)cpool->long_at(index));
522 } else if (tag.is_float()) {
523 return ciConstant((jfloat)cpool->float_at(index));
524 } else if (tag.is_double()) {
525 return ciConstant((jdouble)cpool->double_at(index));
526 } else if (tag.is_string() || tag.is_unresolved_string()) {
527 oop string = NULL;
528 if (cpool->is_pseudo_string_at(index)) {
529 string = cpool->pseudo_string_at(index);
530 } else {
531 string = cpool->string_at(index, THREAD);
532 if (HAS_PENDING_EXCEPTION) {
533 CLEAR_PENDING_EXCEPTION;
534 record_out_of_memory_failure();
535 return ciConstant();
536 }
537 }
538 ciObject* constant = get_object(string);
539 assert (constant->is_instance(), "must be an instance, or not? ");
540 return ciConstant(T_OBJECT, constant);
541 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
542 // 4881222: allow ldc to take a class type
543 bool ignore;
544 ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore, accessor);
545 if (HAS_PENDING_EXCEPTION) {
546 CLEAR_PENDING_EXCEPTION;
547 record_out_of_memory_failure();
548 return ciConstant();
549 }
550 assert (klass->is_instance_klass() || klass->is_array_klass(),
551 "must be an instance or array klass ");
552 return ciConstant(T_OBJECT, klass);
553 } else if (tag.is_object()) {
554 oop obj = cpool->object_at(index);
555 assert(obj->is_instance(), "must be an instance");
556 ciObject* ciobj = get_object(obj);
557 return ciConstant(T_OBJECT, ciobj);
558 } else {
559 ShouldNotReachHere();
560 return ciConstant();
561 }
562 }
564 // ------------------------------------------------------------------
565 // ciEnv::is_unresolved_string_impl
566 //
567 // Implementation of is_unresolved_string().
568 bool ciEnv::is_unresolved_string_impl(instanceKlass* accessor, int index) const {
569 EXCEPTION_CONTEXT;
570 assert(accessor->is_linked(), "must be linked before accessing constant pool");
571 constantPoolOop cpool = accessor->constants();
572 constantTag tag = cpool->tag_at(index);
573 return tag.is_unresolved_string();
574 }
576 // ------------------------------------------------------------------
577 // ciEnv::is_unresolved_klass_impl
578 //
579 // Implementation of is_unresolved_klass().
580 bool ciEnv::is_unresolved_klass_impl(instanceKlass* accessor, int index) const {
581 EXCEPTION_CONTEXT;
582 assert(accessor->is_linked(), "must be linked before accessing constant pool");
583 constantPoolOop cpool = accessor->constants();
584 constantTag tag = cpool->tag_at(index);
585 return tag.is_unresolved_klass();
586 }
588 // ------------------------------------------------------------------
589 // ciEnv::get_constant_by_index
590 //
591 // Pull a constant out of the constant pool. How appropriate.
592 //
593 // Implementation note: this query is currently in no way cached.
594 ciConstant ciEnv::get_constant_by_index(constantPoolHandle cpool,
595 int index,
596 ciInstanceKlass* accessor) {
597 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, index, accessor);)
598 }
600 // ------------------------------------------------------------------
601 // ciEnv::is_unresolved_string
602 //
603 // Check constant pool
604 //
605 // Implementation note: this query is currently in no way cached.
606 bool ciEnv::is_unresolved_string(ciInstanceKlass* accessor,
607 int index) const {
608 GUARDED_VM_ENTRY(return is_unresolved_string_impl(accessor->get_instanceKlass(), index); )
609 }
611 // ------------------------------------------------------------------
612 // ciEnv::is_unresolved_klass
613 //
614 // Check constant pool
615 //
616 // Implementation note: this query is currently in no way cached.
617 bool ciEnv::is_unresolved_klass(ciInstanceKlass* accessor,
618 int index) const {
619 GUARDED_VM_ENTRY(return is_unresolved_klass_impl(accessor->get_instanceKlass(), index); )
620 }
622 // ------------------------------------------------------------------
623 // ciEnv::get_field_by_index_impl
624 //
625 // Implementation of get_field_by_index.
626 //
627 // Implementation note: the results of field lookups are cached
628 // in the accessor klass.
629 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
630 int index) {
631 ciConstantPoolCache* cache = accessor->field_cache();
632 if (cache == NULL) {
633 ciField* field = new (arena()) ciField(accessor, index);
634 return field;
635 } else {
636 ciField* field = (ciField*)cache->get(index);
637 if (field == NULL) {
638 field = new (arena()) ciField(accessor, index);
639 cache->insert(index, field);
640 }
641 return field;
642 }
643 }
645 // ------------------------------------------------------------------
646 // ciEnv::get_field_by_index
647 //
648 // Get a field by index from a klass's constant pool.
649 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
650 int index) {
651 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
652 }
654 // ------------------------------------------------------------------
655 // ciEnv::lookup_method
656 //
657 // Perform an appropriate method lookup based on accessor, holder,
658 // name, signature, and bytecode.
659 methodOop ciEnv::lookup_method(instanceKlass* accessor,
660 instanceKlass* holder,
661 symbolOop name,
662 symbolOop sig,
663 Bytecodes::Code bc) {
664 EXCEPTION_CONTEXT;
665 KlassHandle h_accessor(THREAD, accessor);
666 KlassHandle h_holder(THREAD, holder);
667 symbolHandle h_name(THREAD, name);
668 symbolHandle h_sig(THREAD, sig);
669 LinkResolver::check_klass_accessability(h_accessor, h_holder, KILL_COMPILE_ON_FATAL_(NULL));
670 methodHandle dest_method;
671 switch (bc) {
672 case Bytecodes::_invokestatic:
673 dest_method =
674 LinkResolver::resolve_static_call_or_null(h_holder, h_name, h_sig, h_accessor);
675 break;
676 case Bytecodes::_invokespecial:
677 dest_method =
678 LinkResolver::resolve_special_call_or_null(h_holder, h_name, h_sig, h_accessor);
679 break;
680 case Bytecodes::_invokeinterface:
681 dest_method =
682 LinkResolver::linktime_resolve_interface_method_or_null(h_holder, h_name, h_sig,
683 h_accessor, true);
684 break;
685 case Bytecodes::_invokevirtual:
686 dest_method =
687 LinkResolver::linktime_resolve_virtual_method_or_null(h_holder, h_name, h_sig,
688 h_accessor, true);
689 break;
690 default: ShouldNotReachHere();
691 }
693 return dest_method();
694 }
697 // ------------------------------------------------------------------
698 // ciEnv::get_method_by_index_impl
699 ciMethod* ciEnv::get_method_by_index_impl(constantPoolHandle cpool,
700 int index, Bytecodes::Code bc,
701 ciInstanceKlass* accessor) {
702 int holder_index = cpool->klass_ref_index_at(index);
703 bool holder_is_accessible;
704 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
705 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
707 // Get the method's name and signature.
708 symbolOop name_sym = cpool->name_ref_at(index);
709 symbolOop sig_sym = cpool->signature_ref_at(index);
711 if (holder_is_accessible) { // Our declared holder is loaded.
712 instanceKlass* lookup = declared_holder->get_instanceKlass();
713 methodOop m = lookup_method(accessor->get_instanceKlass(), lookup, name_sym, sig_sym, bc);
714 if (m != NULL) {
715 // We found the method.
716 return get_object(m)->as_method();
717 }
718 }
720 // Either the declared holder was not loaded, or the method could
721 // not be found. Create a dummy ciMethod to represent the failed
722 // lookup.
724 return get_unloaded_method(declared_holder,
725 get_object(name_sym)->as_symbol(),
726 get_object(sig_sym)->as_symbol());
727 }
730 // ------------------------------------------------------------------
731 // ciEnv::get_fake_invokedynamic_method_impl
732 ciMethod* ciEnv::get_fake_invokedynamic_method_impl(constantPoolHandle cpool,
733 int index, Bytecodes::Code bc) {
734 assert(bc == Bytecodes::_invokedynamic, "must be invokedynamic");
736 // Get the CallSite from the constant pool cache.
737 ConstantPoolCacheEntry* cpc_entry = cpool->cache()->secondary_entry_at(index);
738 assert(cpc_entry != NULL && cpc_entry->is_secondary_entry(), "sanity");
739 Handle call_site = cpc_entry->f1();
741 // Call site might not be linked yet.
742 if (call_site.is_null()) {
743 ciInstanceKlass* mh_klass = get_object(SystemDictionary::MethodHandle_klass())->as_instance_klass();
744 ciSymbol* sig_sym = get_object(cpool->signature_ref_at(index))->as_symbol();
745 return get_unloaded_method(mh_klass, ciSymbol::invoke_name(), sig_sym);
746 }
748 // Get the methodOop from the CallSite.
749 methodOop method_oop = (methodOop) java_dyn_CallSite::vmmethod(call_site());
750 assert(method_oop != NULL, "sanity");
751 assert(method_oop->is_method_handle_invoke(), "consistent");
753 return get_object(method_oop)->as_method();
754 }
757 // ------------------------------------------------------------------
758 // ciEnv::get_instance_klass_for_declared_method_holder
759 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
760 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
761 // instead of a ciInstanceKlass. For that case simply pretend that the
762 // declared holder is Object.clone since that's where the call will bottom out.
763 // A more correct fix would trickle out through many interfaces in CI,
764 // requiring ciInstanceKlass* to become ciKlass* and many more places would
765 // require checks to make sure the expected type was found. Given that this
766 // only occurs for clone() the more extensive fix seems like overkill so
767 // instead we simply smear the array type into Object.
768 if (method_holder->is_instance_klass()) {
769 return method_holder->as_instance_klass();
770 } else if (method_holder->is_array_klass()) {
771 return current()->Object_klass();
772 } else {
773 ShouldNotReachHere();
774 }
775 return NULL;
776 }
779 // ------------------------------------------------------------------
780 // ciEnv::get_method_by_index
781 ciMethod* ciEnv::get_method_by_index(constantPoolHandle cpool,
782 int index, Bytecodes::Code bc,
783 ciInstanceKlass* accessor) {
784 if (bc == Bytecodes::_invokedynamic) {
785 GUARDED_VM_ENTRY(return get_fake_invokedynamic_method_impl(cpool, index, bc);)
786 } else {
787 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
788 }
789 }
792 // ------------------------------------------------------------------
793 // ciEnv::name_buffer
794 char *ciEnv::name_buffer(int req_len) {
795 if (_name_buffer_len < req_len) {
796 if (_name_buffer == NULL) {
797 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
798 _name_buffer_len = req_len;
799 } else {
800 _name_buffer =
801 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
802 _name_buffer_len = req_len;
803 }
804 }
805 return _name_buffer;
806 }
808 // ------------------------------------------------------------------
809 // ciEnv::is_in_vm
810 bool ciEnv::is_in_vm() {
811 return JavaThread::current()->thread_state() == _thread_in_vm;
812 }
814 bool ciEnv::system_dictionary_modification_counter_changed() {
815 return _system_dictionary_modification_counter != SystemDictionary::number_of_modifications();
816 }
818 // ------------------------------------------------------------------
819 // ciEnv::check_for_system_dictionary_modification
820 // Check for changes to the system dictionary during compilation
821 // class loads, evolution, breakpoints
822 void ciEnv::check_for_system_dictionary_modification(ciMethod* target) {
823 if (failing()) return; // no need for further checks
825 // Dependencies must be checked when the system dictionary changes.
826 // If logging is enabled all violated dependences will be recorded in
827 // the log. In debug mode check dependencies even if the system
828 // dictionary hasn't changed to verify that no invalid dependencies
829 // were inserted. Any violated dependences in this case are dumped to
830 // the tty.
832 bool counter_changed = system_dictionary_modification_counter_changed();
833 bool test_deps = counter_changed;
834 DEBUG_ONLY(test_deps = true);
835 if (!test_deps) return;
837 bool print_failures = false;
838 DEBUG_ONLY(print_failures = !counter_changed);
840 bool keep_going = (print_failures || xtty != NULL);
842 int violated = 0;
844 for (Dependencies::DepStream deps(dependencies()); deps.next(); ) {
845 klassOop witness = deps.check_dependency();
846 if (witness != NULL) {
847 ++violated;
848 if (print_failures) deps.print_dependency(witness, /*verbose=*/ true);
849 // If there's no log and we're not sanity-checking, we're done.
850 if (!keep_going) break;
851 }
852 }
854 if (violated != 0) {
855 assert(counter_changed, "failed dependencies, but counter didn't change");
856 record_failure("concurrent class loading");
857 }
858 }
860 // ------------------------------------------------------------------
861 // ciEnv::register_method
862 void ciEnv::register_method(ciMethod* target,
863 int entry_bci,
864 CodeOffsets* offsets,
865 int orig_pc_offset,
866 CodeBuffer* code_buffer,
867 int frame_words,
868 OopMapSet* oop_map_set,
869 ExceptionHandlerTable* handler_table,
870 ImplicitExceptionTable* inc_table,
871 AbstractCompiler* compiler,
872 int comp_level,
873 bool has_debug_info,
874 bool has_unsafe_access) {
875 VM_ENTRY_MARK;
876 nmethod* nm = NULL;
877 {
878 // To prevent compile queue updates.
879 MutexLocker locker(MethodCompileQueue_lock, THREAD);
881 // Prevent SystemDictionary::add_to_hierarchy from running
882 // and invalidating our dependencies until we install this method.
883 MutexLocker ml(Compile_lock);
885 // Change in Jvmti state may invalidate compilation.
886 if (!failing() &&
887 ( (!jvmti_can_hotswap_or_post_breakpoint() &&
888 JvmtiExport::can_hotswap_or_post_breakpoint()) ||
889 (!jvmti_can_access_local_variables() &&
890 JvmtiExport::can_access_local_variables()) ||
891 (!jvmti_can_post_on_exceptions() &&
892 JvmtiExport::can_post_on_exceptions()) )) {
893 record_failure("Jvmti state change invalidated dependencies");
894 }
896 // Change in DTrace flags may invalidate compilation.
897 if (!failing() &&
898 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
899 (!dtrace_method_probes() && DTraceMethodProbes) ||
900 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
901 record_failure("DTrace flags change invalidated dependencies");
902 }
904 if (!failing()) {
905 if (log() != NULL) {
906 // Log the dependencies which this compilation declares.
907 dependencies()->log_all_dependencies();
908 }
910 // Encode the dependencies now, so we can check them right away.
911 dependencies()->encode_content_bytes();
913 // Check for {class loads, evolution, breakpoints} during compilation
914 check_for_system_dictionary_modification(target);
915 }
917 methodHandle method(THREAD, target->get_methodOop());
919 if (failing()) {
920 // While not a true deoptimization, it is a preemptive decompile.
921 methodDataOop mdo = method()->method_data();
922 if (mdo != NULL) {
923 mdo->inc_decompile_count();
924 }
926 // All buffers in the CodeBuffer are allocated in the CodeCache.
927 // If the code buffer is created on each compile attempt
928 // as in C2, then it must be freed.
929 code_buffer->free_blob();
930 return;
931 }
933 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
934 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
936 nm = nmethod::new_nmethod(method,
937 compile_id(),
938 entry_bci,
939 offsets,
940 orig_pc_offset,
941 debug_info(), dependencies(), code_buffer,
942 frame_words, oop_map_set,
943 handler_table, inc_table,
944 compiler, comp_level);
946 // Free codeBlobs
947 code_buffer->free_blob();
949 // stress test 6243940 by immediately making the method
950 // non-entrant behind the system's back. This has serious
951 // side effects on the code cache and is not meant for
952 // general stress testing
953 if (nm != NULL && StressNonEntrant) {
954 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag);
955 NativeJump::patch_verified_entry(nm->entry_point(), nm->verified_entry_point(),
956 SharedRuntime::get_handle_wrong_method_stub());
957 }
959 if (nm == NULL) {
960 // The CodeCache is full. Print out warning and disable compilation.
961 record_failure("code cache is full");
962 {
963 MutexUnlocker ml(Compile_lock);
964 MutexUnlocker locker(MethodCompileQueue_lock);
965 CompileBroker::handle_full_code_cache();
966 }
967 } else {
968 NOT_PRODUCT(nm->set_has_debug_info(has_debug_info); )
969 nm->set_has_unsafe_access(has_unsafe_access);
971 // Record successful registration.
972 // (Put nm into the task handle *before* publishing to the Java heap.)
973 if (task() != NULL) task()->set_code(nm);
975 if (entry_bci == InvocationEntryBci) {
976 #ifdef TIERED
977 // If there is an old version we're done with it
978 nmethod* old = method->code();
979 if (TraceMethodReplacement && old != NULL) {
980 ResourceMark rm;
981 char *method_name = method->name_and_sig_as_C_string();
982 tty->print_cr("Replacing method %s", method_name);
983 }
984 if (old != NULL ) {
985 old->make_not_entrant();
986 }
987 #endif // TIERED
988 if (TraceNMethodInstalls ) {
989 ResourceMark rm;
990 char *method_name = method->name_and_sig_as_C_string();
991 ttyLocker ttyl;
992 tty->print_cr("Installing method (%d) %s ",
993 comp_level,
994 method_name);
995 }
996 // Allow the code to be executed
997 method->set_code(method, nm);
998 } else {
999 if (TraceNMethodInstalls ) {
1000 ResourceMark rm;
1001 char *method_name = method->name_and_sig_as_C_string();
1002 ttyLocker ttyl;
1003 tty->print_cr("Installing osr method (%d) %s @ %d",
1004 comp_level,
1005 method_name,
1006 entry_bci);
1007 }
1008 instanceKlass::cast(method->method_holder())->add_osr_nmethod(nm);
1010 }
1011 }
1012 }
1013 // JVMTI -- compiled method notification (must be done outside lock)
1014 if (nm != NULL) {
1015 nm->post_compiled_method_load_event();
1016 }
1018 }
1021 // ------------------------------------------------------------------
1022 // ciEnv::find_system_klass
1023 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1024 VM_ENTRY_MARK;
1025 return get_klass_by_name_impl(NULL, klass_name, false);
1026 }
1028 // ------------------------------------------------------------------
1029 // ciEnv::comp_level
1030 int ciEnv::comp_level() {
1031 if (task() == NULL) return CompLevel_full_optimization;
1032 return task()->comp_level();
1033 }
1035 // ------------------------------------------------------------------
1036 // ciEnv::compile_id
1037 uint ciEnv::compile_id() {
1038 if (task() == NULL) return 0;
1039 return task()->compile_id();
1040 }
1042 // ------------------------------------------------------------------
1043 // ciEnv::notice_inlined_method()
1044 void ciEnv::notice_inlined_method(ciMethod* method) {
1045 _num_inlined_bytecodes += method->code_size();
1046 }
1048 // ------------------------------------------------------------------
1049 // ciEnv::num_inlined_bytecodes()
1050 int ciEnv::num_inlined_bytecodes() const {
1051 return _num_inlined_bytecodes;
1052 }
1054 // ------------------------------------------------------------------
1055 // ciEnv::record_failure()
1056 void ciEnv::record_failure(const char* reason) {
1057 if (log() != NULL) {
1058 log()->elem("failure reason='%s'", reason);
1059 }
1060 if (_failure_reason == NULL) {
1061 // Record the first failure reason.
1062 _failure_reason = reason;
1063 }
1064 }
1066 // ------------------------------------------------------------------
1067 // ciEnv::record_method_not_compilable()
1068 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1069 int new_compilable =
1070 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1072 // Only note transitions to a worse state
1073 if (new_compilable > _compilable) {
1074 if (log() != NULL) {
1075 if (all_tiers) {
1076 log()->elem("method_not_compilable");
1077 } else {
1078 log()->elem("method_not_compilable_at_tier");
1079 }
1080 }
1081 _compilable = new_compilable;
1083 // Reset failure reason; this one is more important.
1084 _failure_reason = NULL;
1085 record_failure(reason);
1086 }
1087 }
1089 // ------------------------------------------------------------------
1090 // ciEnv::record_out_of_memory_failure()
1091 void ciEnv::record_out_of_memory_failure() {
1092 // If memory is low, we stop compiling methods.
1093 record_method_not_compilable("out of memory");
1094 }
