1 /*
2 * Copyright (c) 1999, 2021, 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 "jvm.h"
27 #include "ci/ciConstant.hpp"
28 #include "ci/ciEnv.hpp"
29 #include "ci/ciField.hpp"
30 #include "ci/ciInlineKlass.hpp"
31 #include "ci/ciInstance.hpp"
32 #include "ci/ciInstanceKlass.hpp"
33 #include "ci/ciMethod.hpp"
34 #include "ci/ciNullObject.hpp"
35 #include "ci/ciReplay.hpp"
36 #include "ci/ciSymbols.hpp"
37 #include "ci/ciUtilities.inline.hpp"
38 #include "classfile/javaClasses.hpp"
39 #include "classfile/javaClasses.inline.hpp"
40 #include "classfile/symbolTable.hpp"
41 #include "classfile/systemDictionary.hpp"
42 #include "classfile/vmClasses.hpp"
43 #include "classfile/vmSymbols.hpp"
44 #include "code/codeCache.hpp"
45 #include "code/scopeDesc.hpp"
46 #include "compiler/compilationPolicy.hpp"
47 #include "compiler/compileBroker.hpp"
48 #include "compiler/compilerEvent.hpp"
49 #include "compiler/compileLog.hpp"
50 #include "compiler/compileTask.hpp"
51 #include "compiler/disassembler.hpp"
52 #include "gc/shared/collectedHeap.inline.hpp"
53 #include "interpreter/bytecodeStream.hpp"
54 #include "interpreter/linkResolver.hpp"
55 #include "jfr/jfrEvents.hpp"
56 #include "logging/log.hpp"
57 #include "memory/allocation.inline.hpp"
58 #include "memory/oopFactory.hpp"
59 #include "memory/resourceArea.hpp"
60 #include "memory/universe.hpp"
61 #include "oops/constantPool.inline.hpp"
62 #include "oops/cpCache.inline.hpp"
63 #include "oops/method.inline.hpp"
64 #include "oops/methodData.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "runtime/fieldDescriptor.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/init.hpp"
73 #include "runtime/reflection.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/safepointVerifiers.hpp"
76 #include "runtime/sharedRuntime.hpp"
77 #include "runtime/thread.inline.hpp"
78 #include "utilities/dtrace.hpp"
79 #include "utilities/macros.hpp"
80 #ifdef COMPILER1
81 #include "c1/c1_Runtime1.hpp"
82 #endif
83 #ifdef COMPILER2
84 #include "opto/runtime.hpp"
85 #endif
86
87 // ciEnv
88 //
89 // This class is the top level broker for requests from the compiler
90 // to the VM.
91
92 ciObject* ciEnv::_null_object_instance;
93
94 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = NULL;
95 VM_CLASSES_DO(VM_CLASS_DEFN)
96 #undef VM_CLASS_DEFN
97
98 ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
99 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
100 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
101
102 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
103 jobject ciEnv::_ArrayStoreException_handle = NULL;
104 jobject ciEnv::_ClassCastException_handle = NULL;
105
106 #ifndef PRODUCT
107 static bool firstEnv = true;
108 #endif /* PRODUCT */
109
110 // ------------------------------------------------------------------
111 // ciEnv::ciEnv
112 ciEnv::ciEnv(CompileTask* task)
113 : _ciEnv_arena(mtCompiler) {
114 VM_ENTRY_MARK;
115
116 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
117 thread->set_env(this);
118 assert(ciEnv::current() == this, "sanity");
119
120 _oop_recorder = NULL;
121 _debug_info = NULL;
122 _dependencies = NULL;
123 _failure_reason = NULL;
124 _inc_decompile_count_on_failure = true;
125 _compilable = MethodCompilable;
126 _break_at_compile = false;
127 _compiler_data = NULL;
128 #ifndef PRODUCT
129 assert(!firstEnv, "not initialized properly");
130 #endif /* !PRODUCT */
131
132 _num_inlined_bytecodes = 0;
133 assert(task == NULL || thread->task() == task, "sanity");
134 if (task != NULL) {
135 task->mark_started(os::elapsed_counter());
136 }
137 _task = task;
138 _log = NULL;
139
140 // Temporary buffer for creating symbols and such.
141 _name_buffer = NULL;
142 _name_buffer_len = 0;
143
144 _arena = &_ciEnv_arena;
145 _factory = new (_arena) ciObjectFactory(_arena, 128);
146
147 // Preload commonly referenced system ciObjects.
148
149 // During VM initialization, these instances have not yet been created.
150 // Assertions ensure that these instances are not accessed before
151 // their initialization.
152
153 assert(Universe::is_fully_initialized(), "should be complete");
154
155 oop o = Universe::null_ptr_exception_instance();
156 assert(o != NULL, "should have been initialized");
157 _NullPointerException_instance = get_object(o)->as_instance();
158 o = Universe::arithmetic_exception_instance();
159 assert(o != NULL, "should have been initialized");
160 _ArithmeticException_instance = get_object(o)->as_instance();
161
162 _ArrayIndexOutOfBoundsException_instance = NULL;
163 _ArrayStoreException_instance = NULL;
164 _ClassCastException_instance = NULL;
165 _the_null_string = NULL;
166 _the_min_jint_string = NULL;
167
168 _jvmti_redefinition_count = 0;
169 _jvmti_can_hotswap_or_post_breakpoint = false;
170 _jvmti_can_access_local_variables = false;
171 _jvmti_can_post_on_exceptions = false;
172 _jvmti_can_pop_frame = false;
173
174 _dyno_klasses = NULL;
175 _dyno_locs = NULL;
176 _dyno_name[0] = '\0';
177 }
178
179 // Record components of a location descriptor string. Components are appended by the constructor and
180 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
181 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
182 //
183 // Example use:
184 //
185 // {
186 // RecordLocation fp(this, "field1");
187 // // location: "field1"
188 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
189 // // location: "field1"
190 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
191 // // location: "field1"
192 // }
193 // // location: ""
194 //
195 // Examples of actual locations
196 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
197 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
198 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
199 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
200 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
201 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
202 class RecordLocation {
203 private:
204 char* end;
205
206 ATTRIBUTE_PRINTF(3, 4)
207 void push(ciEnv* ci, const char* fmt, ...) {
208 va_list args;
209 va_start(args, fmt);
210 push_va(ci, fmt, args);
211 va_end(args);
212 }
213
214 public:
215 ATTRIBUTE_PRINTF(3, 0)
216 void push_va(ciEnv* ci, const char* fmt, va_list args) {
217 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
218 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
219 os::vsnprintf(e, m - e, fmt, args);
220 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
221 }
222
223 // append a new component
224 ATTRIBUTE_PRINTF(3, 4)
225 RecordLocation(ciEnv* ci, const char* fmt, ...) {
226 end = ci->_dyno_name + strlen(ci->_dyno_name);
227 va_list args;
228 va_start(args, fmt);
229 push(ci, " ");
230 push_va(ci, fmt, args);
231 va_end(args);
232 }
233
234 // reset to previous state
235 ~RecordLocation() {
236 *end = '\0';
237 }
238 };
239
240 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
241 ASSERT_IN_VM;
242
243 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
244 CompilerThread* current_thread = CompilerThread::current();
245 assert(current_thread->env() == NULL, "must be");
246 current_thread->set_env(this);
247 assert(ciEnv::current() == this, "sanity");
248
249 _oop_recorder = NULL;
250 _debug_info = NULL;
251 _dependencies = NULL;
252 _failure_reason = NULL;
253 _inc_decompile_count_on_failure = true;
254 _compilable = MethodCompilable_never;
255 _break_at_compile = false;
256 _compiler_data = NULL;
257 #ifndef PRODUCT
258 assert(firstEnv, "must be first");
259 firstEnv = false;
260 #endif /* !PRODUCT */
261
262 _num_inlined_bytecodes = 0;
263 _task = NULL;
264 _log = NULL;
265
266 // Temporary buffer for creating symbols and such.
267 _name_buffer = NULL;
268 _name_buffer_len = 0;
269
270 _arena = arena;
271 _factory = new (_arena) ciObjectFactory(_arena, 128);
272
273 // Preload commonly referenced system ciObjects.
274
275 // During VM initialization, these instances have not yet been created.
276 // Assertions ensure that these instances are not accessed before
277 // their initialization.
278
279 assert(Universe::is_fully_initialized(), "must be");
280
281 _NullPointerException_instance = NULL;
282 _ArithmeticException_instance = NULL;
283 _ArrayIndexOutOfBoundsException_instance = NULL;
284 _ArrayStoreException_instance = NULL;
285 _ClassCastException_instance = NULL;
286 _the_null_string = NULL;
287 _the_min_jint_string = NULL;
288
289 _jvmti_redefinition_count = 0;
290 _jvmti_can_hotswap_or_post_breakpoint = false;
291 _jvmti_can_access_local_variables = false;
292 _jvmti_can_post_on_exceptions = false;
293 _jvmti_can_pop_frame = false;
294
295 _dyno_klasses = NULL;
296 _dyno_locs = NULL;
297 }
298
299 ciEnv::~ciEnv() {
300 GUARDED_VM_ENTRY(
301 CompilerThread* current_thread = CompilerThread::current();
302 _factory->remove_symbols();
303 // Need safepoint to clear the env on the thread. RedefineClasses might
304 // be reading it.
305 current_thread->set_env(NULL);
306 )
307 }
308
309 // ------------------------------------------------------------------
310 // Cache Jvmti state
311 bool ciEnv::cache_jvmti_state() {
312 VM_ENTRY_MARK;
313 // Get Jvmti capabilities under lock to get consistant values.
314 MutexLocker mu(JvmtiThreadState_lock);
315 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
316 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
317 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
318 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
319 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
320 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
321 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
322 return _task != NULL && _task->method()->is_old();
323 }
324
325 bool ciEnv::jvmti_state_changed() const {
326 // Some classes were redefined
327 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
328 return true;
329 }
330
331 if (!_jvmti_can_access_local_variables &&
332 JvmtiExport::can_access_local_variables()) {
333 return true;
334 }
335 if (!_jvmti_can_hotswap_or_post_breakpoint &&
336 JvmtiExport::can_hotswap_or_post_breakpoint()) {
337 return true;
338 }
339 if (!_jvmti_can_post_on_exceptions &&
340 JvmtiExport::can_post_on_exceptions()) {
341 return true;
342 }
343 if (!_jvmti_can_pop_frame &&
344 JvmtiExport::can_pop_frame()) {
345 return true;
346 }
347 if (!_jvmti_can_get_owned_monitor_info &&
348 JvmtiExport::can_get_owned_monitor_info()) {
349 return true;
350 }
351 if (!_jvmti_can_walk_any_space &&
352 JvmtiExport::can_walk_any_space()) {
353 return true;
354 }
355
356 return false;
357 }
358
359 // ------------------------------------------------------------------
360 // Cache DTrace flags
361 void ciEnv::cache_dtrace_flags() {
362 // Need lock?
363 _dtrace_extended_probes = ExtendedDTraceProbes;
364 if (_dtrace_extended_probes) {
365 _dtrace_method_probes = true;
366 _dtrace_alloc_probes = true;
367 } else {
368 _dtrace_method_probes = DTraceMethodProbes;
369 _dtrace_alloc_probes = DTraceAllocProbes;
370 }
371 }
372
373 // ------------------------------------------------------------------
374 // helper for lazy exception creation
375 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
376 VM_ENTRY_MARK;
377 if (handle == NULL) {
378 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
379 InstanceKlass* ik = SystemDictionary::find_instance_klass(name, Handle(), Handle());
380 jobject objh = NULL;
381 if (ik != NULL) {
382 oop obj = ik->allocate_instance(THREAD);
383 if (!HAS_PENDING_EXCEPTION)
384 objh = JNIHandles::make_global(Handle(THREAD, obj));
385 }
386 if (HAS_PENDING_EXCEPTION) {
387 CLEAR_PENDING_EXCEPTION;
388 } else {
389 handle = objh;
390 }
391 }
392 oop obj = JNIHandles::resolve(handle);
393 return obj == NULL? NULL: get_object(obj)->as_instance();
394 }
395
396 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
397 if (_ArrayIndexOutOfBoundsException_instance == NULL) {
398 _ArrayIndexOutOfBoundsException_instance
399 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
400 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
401 }
402 return _ArrayIndexOutOfBoundsException_instance;
403 }
404 ciInstance* ciEnv::ArrayStoreException_instance() {
405 if (_ArrayStoreException_instance == NULL) {
406 _ArrayStoreException_instance
407 = get_or_create_exception(_ArrayStoreException_handle,
408 vmSymbols::java_lang_ArrayStoreException());
409 }
410 return _ArrayStoreException_instance;
411 }
412 ciInstance* ciEnv::ClassCastException_instance() {
413 if (_ClassCastException_instance == NULL) {
414 _ClassCastException_instance
415 = get_or_create_exception(_ClassCastException_handle,
416 vmSymbols::java_lang_ClassCastException());
417 }
418 return _ClassCastException_instance;
419 }
420
421 ciInstance* ciEnv::the_null_string() {
422 if (_the_null_string == NULL) {
423 VM_ENTRY_MARK;
424 _the_null_string = get_object(Universe::the_null_string())->as_instance();
425 }
426 return _the_null_string;
427 }
428
429 ciInstance* ciEnv::the_min_jint_string() {
430 if (_the_min_jint_string == NULL) {
431 VM_ENTRY_MARK;
432 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
433 }
434 return _the_min_jint_string;
435 }
436
437 // ------------------------------------------------------------------
438 // ciEnv::get_method_from_handle
439 ciMethod* ciEnv::get_method_from_handle(Method* method) {
440 VM_ENTRY_MARK;
441 return get_metadata(method)->as_method();
442 }
443
444 // ------------------------------------------------------------------
445 // ciEnv::check_klass_accessiblity
446 //
447 // Note: the logic of this method should mirror the logic of
448 // ConstantPool::verify_constant_pool_resolve.
449 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
450 Klass* resolved_klass) {
451 if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
452 return true;
453 }
454 if (accessing_klass->is_obj_array_klass()) {
455 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
456 }
457 if (!accessing_klass->is_instance_klass()) {
458 return true;
459 }
460
461 if (resolved_klass->is_objArray_klass()) {
462 // Find the element klass, if this is an array.
463 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
464 }
465 if (resolved_klass->is_instance_klass()) {
466 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
467 InstanceKlass::cast(resolved_klass),
468 true) == Reflection::ACCESS_OK);
469 }
470 return true;
471 }
472
473 // ------------------------------------------------------------------
474 // ciEnv::get_klass_by_name_impl
475 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
476 const constantPoolHandle& cpool,
477 ciSymbol* name,
478 bool require_local) {
479 ASSERT_IN_VM;
480 Thread* current = Thread::current();
481
482 // Now we need to check the SystemDictionary
483 Symbol* sym = name->get_symbol();
484 if (Signature::has_envelope(sym)) {
485 // This is a name from a signature. Strip off the trimmings.
486 // Call recursive to keep scope of strippedsym.
487 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
488 ciSymbol* strippedname = get_symbol(strippedsym);
489 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
490 }
491
492 // Check for prior unloaded klass. The SystemDictionary's answers
493 // can vary over time but the compiler needs consistency.
494 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
495 if (unloaded_klass != NULL) {
496 if (require_local) return NULL;
497 return unloaded_klass;
498 }
499
500 Handle loader;
501 Handle domain;
502 if (accessing_klass != NULL) {
503 loader = Handle(current, accessing_klass->loader());
504 domain = Handle(current, accessing_klass->protection_domain());
505 }
506
507 // setup up the proper type to return on OOM
508 ciKlass* fail_type;
509 if (sym->char_at(0) == JVM_SIGNATURE_ARRAY) {
510 fail_type = _unloaded_ciobjarrayklass;
511 } else {
512 fail_type = _unloaded_ciinstance_klass;
513 }
514 Klass* found_klass;
515 {
516 ttyUnlocker ttyul; // release tty lock to avoid ordering problems
517 MutexLocker ml(current, Compile_lock);
518 Klass* kls;
519 if (!require_local) {
520 kls = SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
521 } else {
522 kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain);
523 }
524 found_klass = kls;
525 }
526
527 // If we fail to find an array klass, look again for its element type.
528 // The element type may be available either locally or via constraints.
529 // In either case, if we can find the element type in the system dictionary,
530 // we must build an array type around it. The CI requires array klasses
531 // to be loaded if their element klasses are loaded, except when memory
532 // is exhausted.
533 if (Signature::is_array(sym) &&
534 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
535 sym->char_at(1) == JVM_SIGNATURE_CLASS ||
536 sym->char_at(1) == JVM_SIGNATURE_INLINE_TYPE )) {
537 // We have an unloaded array.
538 // Build it on the fly if the element class exists.
539 SignatureStream ss(sym, false);
540 ss.skip_array_prefix(1);
541 // Get element ciKlass recursively.
542 ciKlass* elem_klass =
543 get_klass_by_name_impl(accessing_klass,
544 cpool,
545 get_symbol(ss.as_symbol()),
546 require_local);
547 if (elem_klass != NULL && elem_klass->is_loaded()) {
548 // Now make an array for it
549 bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_INLINE_TYPE;
550 return ciArrayKlass::make(elem_klass, null_free_array);
551 }
552 }
553
554 if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) {
555 // Look inside the constant pool for pre-resolved class entries.
556 for (int i = cpool->length() - 1; i >= 1; i--) {
557 if (cpool->tag_at(i).is_klass()) {
558 Klass* kls = cpool->resolved_klass_at(i);
559 if (kls->name() == sym) {
560 found_klass = kls;
561 break;
562 }
563 }
564 }
565 }
566
567 if (found_klass != NULL) {
568 // Found it. Build a CI handle.
569 return get_klass(found_klass);
570 }
571
572 if (require_local) return NULL;
573
574 // Not yet loaded into the VM, or not governed by loader constraints.
575 // Make a CI representative for it.
576 int i = 0;
577 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
578 i++;
579 }
580 if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_INLINE_TYPE) {
581 // An unloaded array class of inline types is an ObjArrayKlass, an
582 // unloaded inline type class is an InstanceKlass. For consistency,
583 // make the signature of the unloaded array of inline type use L
584 // rather than Q.
585 char* new_name = name_buffer(sym->utf8_length()+1);
586 strncpy(new_name, (char*)sym->base(), sym->utf8_length());
587 new_name[i] = JVM_SIGNATURE_CLASS;
588 new_name[sym->utf8_length()] = '\0';
589 return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name));
590 }
591 return get_unloaded_klass(accessing_klass, name);
592 }
593
594 // ------------------------------------------------------------------
595 // ciEnv::get_klass_by_name
596 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
597 ciSymbol* klass_name,
598 bool require_local) {
599 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
600 constantPoolHandle(),
601 klass_name,
602 require_local);)
603 }
604
605 // ------------------------------------------------------------------
606 // ciEnv::get_klass_by_index_impl
607 //
608 // Implementation of get_klass_by_index.
609 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
610 int index,
611 bool& is_accessible,
612 ciInstanceKlass* accessor) {
613 EXCEPTION_CONTEXT;
614 Klass* klass = NULL;
615 Symbol* klass_name = NULL;
616
617 if (cpool->tag_at(index).is_symbol()) {
618 klass_name = cpool->symbol_at(index);
619 } else {
620 // Check if it's resolved if it's not a symbol constant pool entry.
621 klass = ConstantPool::klass_at_if_loaded(cpool, index);
622 // Try to look it up by name.
623 if (klass == NULL) {
624 klass_name = cpool->klass_name_at(index);
625 }
626 }
627
628 if (klass == NULL) {
629 // Not found in constant pool. Use the name to do the lookup.
630 ciKlass* k = get_klass_by_name_impl(accessor,
631 cpool,
632 get_symbol(klass_name),
633 false);
634 // Calculate accessibility the hard way.
635 if (!k->is_loaded()) {
636 is_accessible = false;
637 } else if (k->loader() != accessor->loader() &&
638 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
639 // Loaded only remotely. Not linked yet.
640 is_accessible = false;
641 } else {
642 // Linked locally, and we must also check public/private, etc.
643 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
644 }
645 return k;
646 }
647
648 // Check for prior unloaded klass. The SystemDictionary's answers
649 // can vary over time but the compiler needs consistency.
650 ciSymbol* name = get_symbol(klass->name());
651 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
652 if (unloaded_klass != NULL) {
653 is_accessible = false;
654 return unloaded_klass;
655 }
656
657 // It is known to be accessible, since it was found in the constant pool.
658 is_accessible = true;
659 return get_klass(klass);
660 }
661
662 // ------------------------------------------------------------------
663 // ciEnv::get_klass_by_index
664 //
665 // Get a klass from the constant pool.
666 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
667 int index,
668 bool& is_accessible,
669 ciInstanceKlass* accessor) {
670 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
671 }
672
673 // ------------------------------------------------------------------
674 // ciEnv::is_inline_klass
675 //
676 // Check if the klass is an inline klass.
677 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) {
678 GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();)
679 }
680
681 // ------------------------------------------------------------------
682 // ciEnv::get_constant_by_index_impl
683 //
684 // Implementation of get_constant_by_index().
685 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
686 int pool_index, int cache_index,
687 ciInstanceKlass* accessor) {
688 bool ignore_will_link;
689 EXCEPTION_CONTEXT;
690 int index = pool_index;
691 if (cache_index >= 0) {
692 assert(index < 0, "only one kind of index at a time");
693 index = cpool->object_to_cp_index(cache_index);
694 oop obj = cpool->resolved_references()->obj_at(cache_index);
695 if (obj != NULL) {
696 if (obj == Universe::the_null_sentinel()) {
697 return ciConstant(T_OBJECT, get_object(NULL));
698 }
699 BasicType bt = T_OBJECT;
700 if (cpool->tag_at(index).is_dynamic_constant())
701 bt = Signature::basic_type(cpool->uncached_signature_ref_at(index));
702 if (is_reference_type(bt)) {
703 } else {
704 // we have to unbox the primitive value
705 if (!is_java_primitive(bt)) return ciConstant();
706 jvalue value;
707 BasicType bt2 = java_lang_boxing_object::get_value(obj, &value);
708 assert(bt2 == bt, "");
709 switch (bt2) {
710 case T_DOUBLE: return ciConstant(value.d);
711 case T_FLOAT: return ciConstant(value.f);
712 case T_LONG: return ciConstant(value.j);
713 case T_INT: return ciConstant(bt2, value.i);
714 case T_SHORT: return ciConstant(bt2, value.s);
715 case T_BYTE: return ciConstant(bt2, value.b);
716 case T_CHAR: return ciConstant(bt2, value.c);
717 case T_BOOLEAN: return ciConstant(bt2, value.z);
718 default: return ciConstant();
719 }
720 }
721 ciObject* ciobj = get_object(obj);
722 if (ciobj->is_array()) {
723 return ciConstant(T_ARRAY, ciobj);
724 } else {
725 assert(ciobj->is_instance(), "should be an instance");
726 return ciConstant(T_OBJECT, ciobj);
727 }
728 }
729 }
730 constantTag tag = cpool->tag_at(index);
731 if (tag.is_int()) {
732 return ciConstant(T_INT, (jint)cpool->int_at(index));
733 } else if (tag.is_long()) {
734 return ciConstant((jlong)cpool->long_at(index));
735 } else if (tag.is_float()) {
736 return ciConstant((jfloat)cpool->float_at(index));
737 } else if (tag.is_double()) {
738 return ciConstant((jdouble)cpool->double_at(index));
739 } else if (tag.is_string()) {
740 oop string = NULL;
741 assert(cache_index >= 0, "should have a cache index");
742 string = cpool->string_at(index, cache_index, THREAD);
743 if (HAS_PENDING_EXCEPTION) {
744 CLEAR_PENDING_EXCEPTION;
745 record_out_of_memory_failure();
746 return ciConstant();
747 }
748 ciObject* constant = get_object(string);
749 if (constant->is_array()) {
750 return ciConstant(T_ARRAY, constant);
751 } else {
752 assert (constant->is_instance(), "must be an instance, or not? ");
753 return ciConstant(T_OBJECT, constant);
754 }
755 } else if (tag.is_unresolved_klass_in_error()) {
756 return ciConstant();
757 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
758 // 4881222: allow ldc to take a class type
759 ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
760 if (HAS_PENDING_EXCEPTION) {
761 CLEAR_PENDING_EXCEPTION;
762 record_out_of_memory_failure();
763 return ciConstant();
764 }
765 assert (klass->is_instance_klass() || klass->is_array_klass(),
766 "must be an instance or array klass ");
767 if (!klass->is_loaded()) {
768 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(klass));
769 } else {
770 if (tag.is_Qdescriptor_klass()) {
771 return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror());
772 } else {
773 return ciConstant(T_OBJECT, klass->java_mirror());
774 }
775 }
776 } else if (tag.is_method_type()) {
777 // must execute Java code to link this CP entry into cache[i].f1
778 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
779 ciObject* ciobj = get_unloaded_method_type_constant(signature);
780 return ciConstant(T_OBJECT, ciobj);
781 } else if (tag.is_method_handle()) {
782 // must execute Java code to link this CP entry into cache[i].f1
783 int ref_kind = cpool->method_handle_ref_kind_at(index);
784 int callee_index = cpool->method_handle_klass_index_at(index);
785 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
786 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
787 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
788 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
789 return ciConstant(T_OBJECT, ciobj);
790 } else if (tag.is_dynamic_constant()) {
791 return ciConstant();
792 } else {
793 ShouldNotReachHere();
794 return ciConstant();
795 }
796 }
797
798 // ------------------------------------------------------------------
799 // ciEnv::get_constant_by_index
800 //
801 // Pull a constant out of the constant pool. How appropriate.
802 //
803 // Implementation note: this query is currently in no way cached.
804 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
805 int pool_index, int cache_index,
806 ciInstanceKlass* accessor) {
807 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
808 }
809
810 // ------------------------------------------------------------------
811 // ciEnv::get_field_by_index_impl
812 //
813 // Implementation of get_field_by_index.
814 //
815 // Implementation note: the results of field lookups are cached
816 // in the accessor klass.
817 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
818 int index) {
819 ciConstantPoolCache* cache = accessor->field_cache();
820 if (cache == NULL) {
821 ciField* field = new (arena()) ciField(accessor, index);
822 return field;
823 } else {
824 ciField* field = (ciField*)cache->get(index);
825 if (field == NULL) {
826 field = new (arena()) ciField(accessor, index);
827 cache->insert(index, field);
828 }
829 return field;
830 }
831 }
832
833 // ------------------------------------------------------------------
834 // ciEnv::get_field_by_index
835 //
836 // Get a field by index from a klass's constant pool.
837 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
838 int index) {
839 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
840 }
841
842 // ------------------------------------------------------------------
843 // ciEnv::lookup_method
844 //
845 // Perform an appropriate method lookup based on accessor, holder,
846 // name, signature, and bytecode.
847 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
848 ciKlass* holder,
849 Symbol* name,
850 Symbol* sig,
851 Bytecodes::Code bc,
852 constantTag tag) {
853 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
854 Klass* holder_klass = holder->get_Klass();
855
856 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
857 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
858
859 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
860 LinkInfo::AccessCheck::required,
861 LinkInfo::LoaderConstraintCheck::required,
862 tag);
863 switch (bc) {
864 case Bytecodes::_invokestatic:
865 return LinkResolver::resolve_static_call_or_null(link_info);
866 case Bytecodes::_invokespecial:
867 return LinkResolver::resolve_special_call_or_null(link_info);
868 case Bytecodes::_invokeinterface:
869 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
870 case Bytecodes::_invokevirtual:
871 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
872 default:
873 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
874 return NULL; // silence compiler warnings
875 }
876 }
877
878
879 // ------------------------------------------------------------------
880 // ciEnv::get_method_by_index_impl
881 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
882 int index, Bytecodes::Code bc,
883 ciInstanceKlass* accessor) {
884 assert(cpool.not_null(), "need constant pool");
885 assert(accessor != NULL, "need origin of access");
886 if (bc == Bytecodes::_invokedynamic) {
887 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
888 bool is_resolved = !cpce->is_f1_null();
889 // FIXME: code generation could allow for null (unlinked) call site
890 // The call site could be made patchable as follows:
891 // Load the appendix argument from the constant pool.
892 // Test the appendix argument and jump to a known deopt routine if it is null.
893 // Jump through a patchable call site, which is initially a deopt routine.
894 // Patch the call site to the nmethod entry point of the static compiled lambda form.
895 // As with other two-component call sites, both values must be independently verified.
896
897 if (is_resolved) {
898 // Get the invoker Method* from the constant pool.
899 // (The appendix argument, if any, will be noted in the method's signature.)
900 Method* adapter = cpce->f1_as_method();
901 return get_method(adapter);
902 }
903
904 // Fake a method that is equivalent to a declared method.
905 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
906 ciSymbol* name = ciSymbols::invokeBasic_name();
907 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index));
908 return get_unloaded_method(holder, name, signature, accessor);
909 } else {
910 const int holder_index = cpool->klass_ref_index_at(index);
911 bool holder_is_accessible;
912 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
913
914 // Get the method's name and signature.
915 Symbol* name_sym = cpool->name_ref_at(index);
916 Symbol* sig_sym = cpool->signature_ref_at(index);
917
918 if (cpool->has_preresolution()
919 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
920 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
921 // Short-circuit lookups for JSR 292-related call sites.
922 // That is, do not rely only on name-based lookups, because they may fail
923 // if the names are not resolvable in the boot class loader (7056328).
924 switch (bc) {
925 case Bytecodes::_invokevirtual:
926 case Bytecodes::_invokeinterface:
927 case Bytecodes::_invokespecial:
928 case Bytecodes::_invokestatic:
929 {
930 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
931 if (m != NULL) {
932 return get_method(m);
933 }
934 }
935 break;
936 default:
937 break;
938 }
939 }
940
941 if (holder_is_accessible) { // Our declared holder is loaded.
942 constantTag tag = cpool->tag_ref_at(index);
943 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
944 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
945 if (m != NULL &&
946 (bc == Bytecodes::_invokestatic
947 ? m->method_holder()->is_not_initialized()
948 : !m->method_holder()->is_loaded())) {
949 m = NULL;
950 }
951 #ifdef ASSERT
952 if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
953 m = NULL;
954 }
955 #endif
956 if (m != NULL) {
957 // We found the method.
958 return get_method(m);
959 }
960 }
961
962 // Either the declared holder was not loaded, or the method could
963 // not be found. Create a dummy ciMethod to represent the failed
964 // lookup.
965 ciSymbol* name = get_symbol(name_sym);
966 ciSymbol* signature = get_symbol(sig_sym);
967 return get_unloaded_method(holder, name, signature, accessor);
968 }
969 }
970
971
972 // ------------------------------------------------------------------
973 // ciEnv::get_instance_klass_for_declared_method_holder
974 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
975 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
976 // instead of a ciInstanceKlass. For that case simply pretend that the
977 // declared holder is Object.clone since that's where the call will bottom out.
978 // A more correct fix would trickle out through many interfaces in CI,
979 // requiring ciInstanceKlass* to become ciKlass* and many more places would
980 // require checks to make sure the expected type was found. Given that this
981 // only occurs for clone() the more extensive fix seems like overkill so
982 // instead we simply smear the array type into Object.
983 guarantee(method_holder != NULL, "no method holder");
984 if (method_holder->is_instance_klass()) {
985 return method_holder->as_instance_klass();
986 } else if (method_holder->is_array_klass()) {
987 return current()->Object_klass();
988 } else {
989 ShouldNotReachHere();
990 }
991 return NULL;
992 }
993
994
995 // ------------------------------------------------------------------
996 // ciEnv::get_method_by_index
997 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
998 int index, Bytecodes::Code bc,
999 ciInstanceKlass* accessor) {
1000 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
1001 }
1002
1003
1004 // ------------------------------------------------------------------
1005 // ciEnv::name_buffer
1006 char *ciEnv::name_buffer(int req_len) {
1007 if (_name_buffer_len < req_len) {
1008 if (_name_buffer == NULL) {
1009 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
1010 _name_buffer_len = req_len;
1011 } else {
1012 _name_buffer =
1013 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
1014 _name_buffer_len = req_len;
1015 }
1016 }
1017 return _name_buffer;
1018 }
1019
1020 // ------------------------------------------------------------------
1021 // ciEnv::is_in_vm
1022 bool ciEnv::is_in_vm() {
1023 return JavaThread::current()->thread_state() == _thread_in_vm;
1024 }
1025
1026 // ------------------------------------------------------------------
1027 // ciEnv::validate_compile_task_dependencies
1028 //
1029 // Check for changes during compilation (e.g. class loads, evolution,
1030 // breakpoints, call site invalidation).
1031 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1032 if (failing()) return; // no need for further checks
1033
1034 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1035 if (result != Dependencies::end_marker) {
1036 if (result == Dependencies::call_site_target_value) {
1037 _inc_decompile_count_on_failure = false;
1038 record_failure("call site target change");
1039 } else if (Dependencies::is_klass_type(result)) {
1040 record_failure("concurrent class loading");
1041 } else {
1042 record_failure("invalid non-klass dependency");
1043 }
1044 }
1045 }
1046
1047 // ------------------------------------------------------------------
1048 // ciEnv::register_method
1049 void ciEnv::register_method(ciMethod* target,
1050 int entry_bci,
1051 CodeOffsets* offsets,
1052 int orig_pc_offset,
1053 CodeBuffer* code_buffer,
1054 int frame_words,
1055 OopMapSet* oop_map_set,
1056 ExceptionHandlerTable* handler_table,
1057 ImplicitExceptionTable* inc_table,
1058 AbstractCompiler* compiler,
1059 bool has_unsafe_access,
1060 bool has_wide_vectors,
1061 RTMState rtm_state,
1062 const GrowableArrayView<RuntimeStub*>& native_invokers) {
1063 VM_ENTRY_MARK;
1064 nmethod* nm = NULL;
1065 {
1066 methodHandle method(THREAD, target->get_Method());
1067
1068 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1069 if (method->get_method_counters(THREAD) == NULL) {
1070 record_failure("can't create method counters");
1071 // All buffers in the CodeBuffer are allocated in the CodeCache.
1072 // If the code buffer is created on each compile attempt
1073 // as in C2, then it must be freed.
1074 code_buffer->free_blob();
1075 return;
1076 }
1077
1078 // To prevent compile queue updates.
1079 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1080
1081 // Prevent SystemDictionary::add_to_hierarchy from running
1082 // and invalidating our dependencies until we install this method.
1083 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1084 MutexLocker ml(Compile_lock);
1085 NoSafepointVerifier nsv;
1086
1087 // Change in Jvmti state may invalidate compilation.
1088 if (!failing() && jvmti_state_changed()) {
1089 record_failure("Jvmti state change invalidated dependencies");
1090 }
1091
1092 // Change in DTrace flags may invalidate compilation.
1093 if (!failing() &&
1094 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
1095 (!dtrace_method_probes() && DTraceMethodProbes) ||
1096 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1097 record_failure("DTrace flags change invalidated dependencies");
1098 }
1099
1100 if (!failing() && target->needs_clinit_barrier() &&
1101 target->holder()->is_in_error_state()) {
1102 record_failure("method holder is in error state");
1103 }
1104
1105 if (!failing()) {
1106 if (log() != NULL) {
1107 // Log the dependencies which this compilation declares.
1108 dependencies()->log_all_dependencies();
1109 }
1110
1111 // Encode the dependencies now, so we can check them right away.
1112 dependencies()->encode_content_bytes();
1113
1114 // Check for {class loads, evolution, breakpoints, ...} during compilation
1115 validate_compile_task_dependencies(target);
1116 }
1117 #if INCLUDE_RTM_OPT
1118 if (!failing() && (rtm_state != NoRTM) &&
1119 (method()->method_data() != NULL) &&
1120 (method()->method_data()->rtm_state() != rtm_state)) {
1121 // Preemptive decompile if rtm state was changed.
1122 record_failure("RTM state change invalidated rtm code");
1123 }
1124 #endif
1125
1126 if (failing()) {
1127 // While not a true deoptimization, it is a preemptive decompile.
1128 MethodData* mdo = method()->method_data();
1129 if (mdo != NULL && _inc_decompile_count_on_failure) {
1130 mdo->inc_decompile_count();
1131 }
1132
1133 // All buffers in the CodeBuffer are allocated in the CodeCache.
1134 // If the code buffer is created on each compile attempt
1135 // as in C2, then it must be freed.
1136 code_buffer->free_blob();
1137 return;
1138 }
1139
1140 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1141 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1142
1143 nm = nmethod::new_nmethod(method,
1144 compile_id(),
1145 entry_bci,
1146 offsets,
1147 orig_pc_offset,
1148 debug_info(), dependencies(), code_buffer,
1149 frame_words, oop_map_set,
1150 handler_table, inc_table,
1151 compiler, task()->comp_level(),
1152 native_invokers);
1153
1154 // Free codeBlobs
1155 code_buffer->free_blob();
1156
1157 if (nm != NULL) {
1158 nm->set_has_unsafe_access(has_unsafe_access);
1159 nm->set_has_wide_vectors(has_wide_vectors);
1160 #if INCLUDE_RTM_OPT
1161 nm->set_rtm_state(rtm_state);
1162 #endif
1163
1164 // Record successful registration.
1165 // (Put nm into the task handle *before* publishing to the Java heap.)
1166 if (task() != NULL) {
1167 task()->set_code(nm);
1168 }
1169
1170 if (entry_bci == InvocationEntryBci) {
1171 if (TieredCompilation) {
1172 // If there is an old version we're done with it
1173 CompiledMethod* old = method->code();
1174 if (TraceMethodReplacement && old != NULL) {
1175 ResourceMark rm;
1176 char *method_name = method->name_and_sig_as_C_string();
1177 tty->print_cr("Replacing method %s", method_name);
1178 }
1179 if (old != NULL) {
1180 old->make_not_used();
1181 }
1182 }
1183
1184 LogTarget(Info, nmethod, install) lt;
1185 if (lt.is_enabled()) {
1186 ResourceMark rm;
1187 char *method_name = method->name_and_sig_as_C_string();
1188 lt.print("Installing method (%d) %s ",
1189 task()->comp_level(), method_name);
1190 }
1191 // Allow the code to be executed
1192 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1193 if (nm->make_in_use()) {
1194 method->set_code(method, nm);
1195 }
1196 } else {
1197 LogTarget(Info, nmethod, install) lt;
1198 if (lt.is_enabled()) {
1199 ResourceMark rm;
1200 char *method_name = method->name_and_sig_as_C_string();
1201 lt.print("Installing osr method (%d) %s @ %d",
1202 task()->comp_level(), method_name, entry_bci);
1203 }
1204 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1205 if (nm->make_in_use()) {
1206 method->method_holder()->add_osr_nmethod(nm);
1207 }
1208 }
1209 }
1210 } // safepoints are allowed again
1211
1212 if (nm != NULL) {
1213 // JVMTI -- compiled method notification (must be done outside lock)
1214 nm->post_compiled_method_load_event();
1215 } else {
1216 // The CodeCache is full.
1217 record_failure("code cache is full");
1218 }
1219 }
1220
1221 // ------------------------------------------------------------------
1222 // ciEnv::comp_level
1223 int ciEnv::comp_level() {
1224 if (task() == NULL) return CompilationPolicy::highest_compile_level();
1225 return task()->comp_level();
1226 }
1227
1228 // ------------------------------------------------------------------
1229 // ciEnv::compile_id
1230 uint ciEnv::compile_id() {
1231 if (task() == NULL) return 0;
1232 return task()->compile_id();
1233 }
1234
1235 // ------------------------------------------------------------------
1236 // ciEnv::notice_inlined_method()
1237 void ciEnv::notice_inlined_method(ciMethod* method) {
1238 _num_inlined_bytecodes += method->code_size_for_inlining();
1239 }
1240
1241 // ------------------------------------------------------------------
1242 // ciEnv::num_inlined_bytecodes()
1243 int ciEnv::num_inlined_bytecodes() const {
1244 return _num_inlined_bytecodes;
1245 }
1246
1247 // ------------------------------------------------------------------
1248 // ciEnv::record_failure()
1249 void ciEnv::record_failure(const char* reason) {
1250 if (_failure_reason == NULL) {
1251 // Record the first failure reason.
1252 _failure_reason = reason;
1253 }
1254 }
1255
1256 void ciEnv::report_failure(const char* reason) {
1257 EventCompilationFailure event;
1258 if (event.should_commit()) {
1259 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1260 }
1261 }
1262
1263 // ------------------------------------------------------------------
1264 // ciEnv::record_method_not_compilable()
1265 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1266 int new_compilable =
1267 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1268
1269 // Only note transitions to a worse state
1270 if (new_compilable > _compilable) {
1271 if (log() != NULL) {
1272 if (all_tiers) {
1273 log()->elem("method_not_compilable");
1274 } else {
1275 log()->elem("method_not_compilable_at_tier level='%d'",
1276 current()->task()->comp_level());
1277 }
1278 }
1279 _compilable = new_compilable;
1280
1281 // Reset failure reason; this one is more important.
1282 _failure_reason = NULL;
1283 record_failure(reason);
1284 }
1285 }
1286
1287 // ------------------------------------------------------------------
1288 // ciEnv::record_out_of_memory_failure()
1289 void ciEnv::record_out_of_memory_failure() {
1290 // If memory is low, we stop compiling methods.
1291 record_method_not_compilable("out of memory");
1292 }
1293
1294 ciInstance* ciEnv::unloaded_ciinstance() {
1295 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1296 }
1297
1298 // ------------------------------------------------------------------
1299 // Replay support
1300
1301
1302 // Lookup location descriptor for the class, if any.
1303 // Returns false if not found.
1304 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1305 bool found = false;
1306 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1307 if (!found) {
1308 return false;
1309 }
1310 loc = _dyno_locs->at(pos);
1311 return found;
1312 }
1313
1314 // Associate the current location descriptor with the given class and record for later lookup.
1315 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1316 const char *loc = os::strdup(_dyno_name);
1317 bool found = false;
1318 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1319 if (found) {
1320 _dyno_locs->at_put(pos, loc);
1321 } else {
1322 _dyno_klasses->insert_before(pos, ik);
1323 _dyno_locs->insert_before(pos, loc);
1324 }
1325 }
1326
1327 // Associate the current location descriptor with the given class and record for later lookup.
1328 // If it turns out that there are multiple locations for the given class, that conflict should
1329 // be handled here. Currently we choose the first location found.
1330 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1331 if (!ik->is_hidden()) {
1332 return;
1333 }
1334 const char *loc0;
1335 if (dyno_loc(ik, loc0)) {
1336 // TODO: found multiple references, see if we can improve
1337 if (Verbose) {
1338 tty->print_cr("existing call site @ %s for %s",
1339 loc0, ik->external_name());
1340 }
1341 } else {
1342 set_dyno_loc(ik);
1343 }
1344 }
1345
1346 // Look up the location descriptor for the given class and print it to the output stream.
1347 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1348 const char *loc;
1349 if (dyno_loc(ik, loc)) {
1350 out->print("%s", loc);
1351 return true;
1352 } else {
1353 return false;
1354 }
1355 }
1356
1357 // Look up the location descriptor for the given class and return it as a string.
1358 // Returns NULL if no location is found.
1359 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1360 if (ik->is_hidden()) {
1361 stringStream ss;
1362 if (print_dyno_loc(&ss, ik)) {
1363 ss.print(" ;"); // add terminator
1364 const char* call_site = ss.as_string();
1365 return call_site;
1366 }
1367 }
1368 return NULL;
1369 }
1370
1371 // Look up the location descriptor for the given class and return it as a string.
1372 // Returns the class name as a fallback if no location is found.
1373 const char *ciEnv::replay_name(ciKlass* k) const {
1374 if (k->is_instance_klass()) {
1375 return replay_name(k->as_instance_klass()->get_instanceKlass());
1376 }
1377 return k->name()->as_quoted_ascii();
1378 }
1379
1380 // Look up the location descriptor for the given class and return it as a string.
1381 // Returns the class name as a fallback if no location is found.
1382 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1383 const char* name = dyno_name(ik);
1384 if (name != NULL) {
1385 return name;
1386 }
1387 return ik->name()->as_quoted_ascii();
1388 }
1389
1390 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1391 void ciEnv::record_member(Thread* thread, oop member) {
1392 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1393 // Check MemberName.clazz field
1394 oop clazz = java_lang_invoke_MemberName::clazz(member);
1395 if (clazz->klass()->is_instance_klass()) {
1396 RecordLocation fp(this, "clazz");
1397 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1398 record_best_dyno_loc(ik);
1399 }
1400 // Check MemberName.method.vmtarget field
1401 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1402 if (vmtarget != NULL) {
1403 RecordLocation fp2(this, "<vmtarget>");
1404 InstanceKlass* ik = vmtarget->method_holder();
1405 record_best_dyno_loc(ik);
1406 }
1407 }
1408
1409 // Read an object field. Lookup is done by name only.
1410 static inline oop obj_field(oop obj, const char* name) {
1411 return ciReplay::obj_field(obj, name);
1412 }
1413
1414 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1415 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1416 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1417
1418 {
1419 // Check LambdaForm.vmentry field
1420 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1421 RecordLocation fp0(this, "vmentry");
1422 record_member(thread, member);
1423 }
1424
1425 // Check LambdaForm.names array
1426 objArrayOop names = (objArrayOop)obj_field(form, "names");
1427 if (names != NULL) {
1428 RecordLocation lp0(this, "names");
1429 int len = names->length();
1430 for (int i = 0; i < len; ++i) {
1431 oop name = names->obj_at(i);
1432 RecordLocation lp1(this, "%d", i);
1433 // Check LambdaForm.names[i].function field
1434 RecordLocation lp2(this, "function");
1435 oop function = obj_field(name, "function");
1436 if (function != NULL) {
1437 // Check LambdaForm.names[i].function.member field
1438 oop member = obj_field(function, "member");
1439 if (member != NULL) {
1440 RecordLocation lp3(this, "member");
1441 record_member(thread, member);
1442 }
1443 // Check LambdaForm.names[i].function.resolvedHandle field
1444 oop mh = obj_field(function, "resolvedHandle");
1445 if (mh != NULL) {
1446 RecordLocation lp3(this, "resolvedHandle");
1447 record_mh(thread, mh);
1448 }
1449 // Check LambdaForm.names[i].function.invoker field
1450 oop invoker = obj_field(function, "invoker");
1451 if (invoker != NULL) {
1452 RecordLocation lp3(this, "invoker");
1453 record_mh(thread, invoker);
1454 }
1455 }
1456 }
1457 }
1458 }
1459
1460 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1461 void ciEnv::record_mh(Thread* thread, oop mh) {
1462 {
1463 // Check MethodHandle.form field
1464 oop form = java_lang_invoke_MethodHandle::form(mh);
1465 RecordLocation fp(this, "form");
1466 record_lambdaform(thread, form);
1467 }
1468 // Check DirectMethodHandle.member field
1469 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1470 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1471 RecordLocation fp(this, "member");
1472 record_member(thread, member);
1473 } else {
1474 // Check <MethodHandle subclass>.argL0 field
1475 // Probably BoundMethodHandle.Species_L, but we only care if the field exists
1476 oop arg = obj_field(mh, "argL0");
1477 if (arg != NULL) {
1478 RecordLocation fp(this, "argL0");
1479 if (arg->klass()->is_instance_klass()) {
1480 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1481 record_best_dyno_loc(ik2);
1482 }
1483 }
1484 }
1485 }
1486
1487 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1488 // Types currently supported are MethodHandle and CallSite.
1489 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1490 void ciEnv::record_call_site_obj(Thread* thread, const constantPoolHandle& pool, const Handle obj)
1491 {
1492 if (obj.not_null()) {
1493 if (java_lang_invoke_MethodHandle::is_instance(obj())) {
1494 record_mh(thread, obj());
1495 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj())) {
1496 oop target = java_lang_invoke_CallSite::target(obj());
1497 if (target->klass()->is_instance_klass()) {
1498 RecordLocation fp(this, "target");
1499 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1500 record_best_dyno_loc(ik);
1501 }
1502 }
1503 }
1504 }
1505
1506 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1507 void ciEnv::record_call_site_method(Thread* thread, const constantPoolHandle& pool, Method* adapter) {
1508 InstanceKlass* holder = adapter->method_holder();
1509 if (!holder->is_hidden()) {
1510 return;
1511 }
1512 RecordLocation fp(this, "<adapter>");
1513 record_best_dyno_loc(holder);
1514 }
1515
1516 // Process an invokedynamic call site and record any dynamic locations.
1517 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1518 ConstantPoolCacheEntry* cp_cache_entry = cp->invokedynamic_cp_cache_entry_at(indy_index);
1519 if (cp_cache_entry->is_resolved(Bytecodes::_invokedynamic)) {
1520 // process the adapter
1521 Method* adapter = cp_cache_entry->f1_as_method();
1522 record_call_site_method(thread, cp, adapter);
1523 // process the appendix
1524 Handle appendix(thread, cp_cache_entry->appendix_if_resolved(cp));
1525 {
1526 RecordLocation fp(this, "<appendix>");
1527 record_call_site_obj(thread, cp, appendix);
1528 }
1529 // process the BSM
1530 int pool_index = cp_cache_entry->constant_pool_index();
1531 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1532 oop bsm_oop = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1533 Handle bsm(thread, bsm_oop);
1534 {
1535 RecordLocation fp(this, "<bsm>");
1536 record_call_site_obj(thread, cp, bsm);
1537 }
1538 }
1539 }
1540
1541 // Process an invokehandle call site and record any dynamic locations.
1542 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1543 const int holder_index = cp->klass_ref_index_at(index);
1544 if (!cp->tag_at(holder_index).is_klass()) {
1545 return; // not resolved
1546 }
1547 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1548 Symbol* name = cp->name_ref_at(index);
1549 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1550 ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
1551 if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) {
1552 // process the adapter
1553 Method* adapter = cp_cache_entry->f1_as_method();
1554 Handle appendix(thread, cp_cache_entry->appendix_if_resolved(cp));
1555 record_call_site_method(thread, cp, adapter);
1556 // process the appendix
1557 {
1558 RecordLocation fp(this, "<appendix>");
1559 record_call_site_obj(thread, cp, appendix);
1560 }
1561 }
1562 }
1563 }
1564
1565 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1566 // constant pool entries and record for future lookup.
1567 void ciEnv::find_dynamic_call_sites() {
1568 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, NULL);
1569 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, NULL);
1570
1571 // Iterate over the class hierarchy
1572 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1573 Klass* sub = iter.klass();
1574 if (sub->is_instance_klass()) {
1575 InstanceKlass *isub = InstanceKlass::cast(sub);
1576 InstanceKlass* ik = isub;
1577 if (!ik->is_linked()) {
1578 continue;
1579 }
1580 if (ik->is_hidden()) {
1581 continue;
1582 }
1583 JavaThread* thread = JavaThread::current();
1584 const constantPoolHandle pool(thread, ik->constants());
1585
1586 // Look for invokedynamic/invokehandle call sites
1587 for (int i = 0; i < ik->methods()->length(); ++i) {
1588 Method* m = ik->methods()->at(i);
1589
1590 BytecodeStream bcs(methodHandle(thread, m));
1591 while (!bcs.is_last_bytecode()) {
1592 Bytecodes::Code opcode = bcs.next();
1593 opcode = bcs.raw_code();
1594 switch (opcode) {
1595 case Bytecodes::_invokedynamic:
1596 case Bytecodes::_invokehandle: {
1597 RecordLocation fp(this, "@bci %s %s %s %d",
1598 ik->name()->as_quoted_ascii(),
1599 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1600 bcs.bci());
1601 if (opcode == Bytecodes::_invokedynamic) {
1602 int index = bcs.get_index_u4();
1603 process_invokedynamic(pool, index, thread);
1604 } else {
1605 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1606 int cp_cache_index = bcs.get_index_u2_cpcache();
1607 process_invokehandle(pool, cp_cache_index, thread);
1608 }
1609 break;
1610 }
1611 default:
1612 break;
1613 }
1614 }
1615 }
1616
1617 // Look for MethodHandle contant pool entries
1618 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1619 int len = pool->length();
1620 for (int i = 0; i < len; ++i) {
1621 if (pool->tag_at(i).is_method_handle()) {
1622 bool found_it;
1623 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1624 if (mh != NULL) {
1625 RecordLocation fp(this, "%d", i);
1626 record_mh(thread, mh);
1627 }
1628 }
1629 }
1630 }
1631 }
1632 }
1633
1634 void ciEnv::dump_compile_data(outputStream* out) {
1635 CompileTask* task = this->task();
1636 if (task) {
1637 Method* method = task->method();
1638 int entry_bci = task->osr_bci();
1639 int comp_level = task->comp_level();
1640 out->print("compile ");
1641 get_method(method)->dump_name_as_ascii(out);
1642 out->print(" %d %d", entry_bci, comp_level);
1643 if (compiler_data() != NULL) {
1644 if (is_c2_compile(comp_level)) {
1645 #ifdef COMPILER2
1646 // Dump C2 inlining data.
1647 ((Compile*)compiler_data())->dump_inline_data(out);
1648 #endif
1649 } else if (is_c1_compile(comp_level)) {
1650 #ifdef COMPILER1
1651 // Dump C1 inlining data.
1652 ((Compilation*)compiler_data())->dump_inline_data(out);
1653 #endif
1654 }
1655 }
1656 out->cr();
1657 }
1658 }
1659
1660 // Called from VM error reporter, so be careful.
1661 // Don't safepoint or acquire any locks.
1662 //
1663 void ciEnv::dump_replay_data_helper(outputStream* out) {
1664 NoSafepointVerifier no_safepoint;
1665 ResourceMark rm;
1666
1667 #if INCLUDE_JVMTI
1668 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1669 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1670 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1671 #endif // INCLUDE_JVMTI
1672
1673 find_dynamic_call_sites();
1674
1675 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1676 out->print_cr("# %d ciObject found", objects->length());
1677 for (int i = 0; i < objects->length(); i++) {
1678 objects->at(i)->dump_replay_data(out);
1679 }
1680 dump_compile_data(out);
1681 out->flush();
1682 }
1683
1684 // Called from VM error reporter, so be careful.
1685 // Don't safepoint or acquire any locks.
1686 //
1687 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1688 GUARDED_VM_ENTRY(
1689 dump_replay_data_helper(out);
1690 )
1691 }
1692
1693 void ciEnv::dump_replay_data(outputStream* out) {
1694 GUARDED_VM_ENTRY(
1695 MutexLocker ml(Compile_lock);
1696 dump_replay_data_helper(out);
1697 )
1698 }
1699
1700 void ciEnv::dump_replay_data(int compile_id) {
1701 static char buffer[O_BUFLEN];
1702 int ret = jio_snprintf(buffer, O_BUFLEN, "replay_pid%p_compid%d.log", os::current_process_id(), compile_id);
1703 if (ret > 0) {
1704 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1705 if (fd != -1) {
1706 FILE* replay_data_file = os::open(fd, "w");
1707 if (replay_data_file != NULL) {
1708 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1709 dump_replay_data(&replay_data_stream);
1710 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1711 } else {
1712 tty->print_cr("# Can't open file to dump replay data.");
1713 }
1714 }
1715 }
1716 }
1717
1718 void ciEnv::dump_inline_data(int compile_id) {
1719 static char buffer[O_BUFLEN];
1720 int ret = jio_snprintf(buffer, O_BUFLEN, "inline_pid%p_compid%d.log", os::current_process_id(), compile_id);
1721 if (ret > 0) {
1722 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1723 if (fd != -1) {
1724 FILE* inline_data_file = os::open(fd, "w");
1725 if (inline_data_file != NULL) {
1726 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1727 GUARDED_VM_ENTRY(
1728 MutexLocker ml(Compile_lock);
1729 dump_compile_data(&replay_data_stream);
1730 )
1731 replay_data_stream.flush();
1732 tty->print("# Compiler inline data is saved as: ");
1733 tty->print_cr("%s", buffer);
1734 } else {
1735 tty->print_cr("# Can't open file to dump inline data.");
1736 }
1737 }
1738 }
1739 }