1 /*
2 * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciConstant.hpp"
27 #include "ci/ciEnv.hpp"
28 #include "ci/ciField.hpp"
29 #include "ci/ciInstance.hpp"
30 #include "ci/ciInstanceKlass.hpp"
31 #include "ci/ciMethod.hpp"
32 #include "ci/ciNullObject.hpp"
33 #include "ci/ciReplay.hpp"
34 #include "ci/ciSymbols.hpp"
35 #include "ci/ciUtilities.inline.hpp"
36 #include "classfile/javaClasses.hpp"
37 #include "classfile/javaClasses.inline.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/codeCache.hpp"
42 #include "code/scopeDesc.hpp"
43 #include "compiler/compilationLog.hpp"
44 #include "compiler/compilationPolicy.hpp"
45 #include "compiler/compileBroker.hpp"
46 #include "compiler/compilerEvent.hpp"
47 #include "compiler/compileLog.hpp"
48 #include "compiler/compileTask.hpp"
49 #include "compiler/disassembler.hpp"
50 #include "gc/shared/collectedHeap.inline.hpp"
51 #include "interpreter/bytecodeStream.hpp"
52 #include "interpreter/linkResolver.hpp"
53 #include "jfr/jfrEvents.hpp"
54 #include "jvm.h"
55 #include "logging/log.hpp"
56 #include "memory/allocation.inline.hpp"
57 #include "memory/oopFactory.hpp"
58 #include "memory/resourceArea.hpp"
59 #include "memory/universe.hpp"
60 #include "oops/constantPool.inline.hpp"
61 #include "oops/cpCache.inline.hpp"
62 #include "oops/method.inline.hpp"
63 #include "oops/methodData.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/resolvedIndyEntry.hpp"
68 #include "oops/symbolHandle.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "runtime/fieldDescriptor.inline.hpp"
72 #include "runtime/handles.inline.hpp"
73 #include "runtime/init.hpp"
74 #include "runtime/javaThread.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/safepointVerifiers.hpp"
78 #include "runtime/sharedRuntime.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/macros.hpp"
81 #ifdef COMPILER1
82 #include "c1/c1_Runtime1.hpp"
83 #endif
84 #ifdef COMPILER2
85 #include "opto/runtime.hpp"
86 #endif
87
88 // ciEnv
89 //
90 // This class is the top level broker for requests from the compiler
91 // to the VM.
92
93 ciObject* ciEnv::_null_object_instance;
94
95 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
96 VM_CLASSES_DO(VM_CLASS_DEFN)
97 #undef VM_CLASS_DEFN
98
99 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr;
100 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
101 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
102
103 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = nullptr;
104 jobject ciEnv::_ArrayStoreException_handle = nullptr;
105 jobject ciEnv::_ClassCastException_handle = nullptr;
106
107 #ifndef PRODUCT
108 static bool firstEnv = true;
109 #endif /* PRODUCT */
110
111 // ------------------------------------------------------------------
112 // ciEnv::ciEnv
113 ciEnv::ciEnv(CompileTask* task)
114 : _ciEnv_arena(mtCompiler) {
115 VM_ENTRY_MARK;
116
117 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
118 thread->set_env(this);
119 assert(ciEnv::current() == this, "sanity");
120
121 _oop_recorder = nullptr;
122 _debug_info = nullptr;
123 _dependencies = nullptr;
124 _failure_reason = nullptr;
125 _inc_decompile_count_on_failure = true;
126 _compilable = MethodCompilable;
127 _break_at_compile = false;
128 _compiler_data = nullptr;
129 #ifndef PRODUCT
130 assert(!firstEnv, "not initialized properly");
131 #endif /* !PRODUCT */
132
133 _num_inlined_bytecodes = 0;
134 assert(task == nullptr || thread->task() == task, "sanity");
135 if (task != nullptr) {
136 task->mark_started(os::elapsed_counter());
137 }
138 _task = task;
139 _log = nullptr;
140
141 // Temporary buffer for creating symbols and such.
142 _name_buffer = nullptr;
143 _name_buffer_len = 0;
144
145 _arena = &_ciEnv_arena;
146 _factory = new (_arena) ciObjectFactory(_arena, 128);
147
148 // Preload commonly referenced system ciObjects.
149
150 // During VM initialization, these instances have not yet been created.
151 // Assertions ensure that these instances are not accessed before
152 // their initialization.
153
154 assert(Universe::is_fully_initialized(), "should be complete");
155
156 oop o = Universe::null_ptr_exception_instance();
157 assert(o != nullptr, "should have been initialized");
158 _NullPointerException_instance = get_object(o)->as_instance();
159 o = Universe::arithmetic_exception_instance();
160 assert(o != nullptr, "should have been initialized");
161 _ArithmeticException_instance = get_object(o)->as_instance();
162
163 _ArrayIndexOutOfBoundsException_instance = nullptr;
164 _ArrayStoreException_instance = nullptr;
165 _ClassCastException_instance = nullptr;
166 _the_null_string = nullptr;
167 _the_min_jint_string = nullptr;
168
169 _jvmti_redefinition_count = 0;
170 _jvmti_can_hotswap_or_post_breakpoint = false;
171 _jvmti_can_access_local_variables = false;
172 _jvmti_can_post_on_exceptions = false;
173 _jvmti_can_pop_frame = false;
174
175 _dyno_klasses = nullptr;
176 _dyno_locs = nullptr;
177 _dyno_name[0] = '\0';
178 }
179
180 // Record components of a location descriptor string. Components are appended by the constructor and
181 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
182 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
183 //
184 // Example use:
185 //
186 // {
187 // RecordLocation fp(this, "field1");
188 // // location: "field1"
189 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
190 // // location: "field1"
191 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
192 // // location: "field1"
193 // }
194 // // location: ""
195 //
196 // Examples of actual locations
197 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
198 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
199 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
200 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
201 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
202 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
203 class RecordLocation {
204 private:
205 char* end;
206
207 ATTRIBUTE_PRINTF(3, 4)
208 void push(ciEnv* ci, const char* fmt, ...) {
209 va_list args;
210 va_start(args, fmt);
211 push_va(ci, fmt, args);
212 va_end(args);
213 }
214
215 public:
216 ATTRIBUTE_PRINTF(3, 0)
217 void push_va(ciEnv* ci, const char* fmt, va_list args) {
218 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
219 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
220 os::vsnprintf(e, m - e, fmt, args);
221 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
222 }
223
224 // append a new component
225 ATTRIBUTE_PRINTF(3, 4)
226 RecordLocation(ciEnv* ci, const char* fmt, ...) {
227 end = ci->_dyno_name + strlen(ci->_dyno_name);
228 va_list args;
229 va_start(args, fmt);
230 push(ci, " ");
231 push_va(ci, fmt, args);
232 va_end(args);
233 }
234
235 // reset to previous state
236 ~RecordLocation() {
237 *end = '\0';
238 }
239 };
240
241 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
242 ASSERT_IN_VM;
243
244 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
245 CompilerThread* current_thread = CompilerThread::current();
246 assert(current_thread->env() == nullptr, "must be");
247 current_thread->set_env(this);
248 assert(ciEnv::current() == this, "sanity");
249
250 _oop_recorder = nullptr;
251 _debug_info = nullptr;
252 _dependencies = nullptr;
253 _failure_reason = nullptr;
254 _inc_decompile_count_on_failure = true;
255 _compilable = MethodCompilable_never;
256 _break_at_compile = false;
257 _compiler_data = nullptr;
258 #ifndef PRODUCT
259 assert(firstEnv, "must be first");
260 firstEnv = false;
261 #endif /* !PRODUCT */
262
263 _num_inlined_bytecodes = 0;
264 _task = nullptr;
265 _log = nullptr;
266
267 // Temporary buffer for creating symbols and such.
268 _name_buffer = nullptr;
269 _name_buffer_len = 0;
270
271 _arena = arena;
272 _factory = new (_arena) ciObjectFactory(_arena, 128);
273
274 // Preload commonly referenced system ciObjects.
275
276 // During VM initialization, these instances have not yet been created.
277 // Assertions ensure that these instances are not accessed before
278 // their initialization.
279
280 assert(Universe::is_fully_initialized(), "must be");
281
282 _NullPointerException_instance = nullptr;
283 _ArithmeticException_instance = nullptr;
284 _ArrayIndexOutOfBoundsException_instance = nullptr;
285 _ArrayStoreException_instance = nullptr;
286 _ClassCastException_instance = nullptr;
287 _the_null_string = nullptr;
288 _the_min_jint_string = nullptr;
289
290 _jvmti_redefinition_count = 0;
291 _jvmti_can_hotswap_or_post_breakpoint = false;
292 _jvmti_can_access_local_variables = false;
293 _jvmti_can_post_on_exceptions = false;
294 _jvmti_can_pop_frame = false;
295
296 _dyno_klasses = nullptr;
297 _dyno_locs = nullptr;
298 }
299
300 ciEnv::~ciEnv() {
301 GUARDED_VM_ENTRY(
302 CompilerThread* current_thread = CompilerThread::current();
303 _factory->remove_symbols();
304 // Need safepoint to clear the env on the thread. RedefineClasses might
305 // be reading it.
306 current_thread->set_env(nullptr);
307 )
308 }
309
310 // ------------------------------------------------------------------
311 // Cache Jvmti state
312 bool ciEnv::cache_jvmti_state() {
313 VM_ENTRY_MARK;
314 // Get Jvmti capabilities under lock to get consistent values.
315 MutexLocker mu(JvmtiThreadState_lock);
316 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
317 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
318 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
319 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
320 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
321 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
322 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
323 return _task != nullptr && _task->method()->is_old();
324 }
325
326 bool ciEnv::jvmti_state_changed() const {
327 // Some classes were redefined
328 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
329 return true;
330 }
331
332 if (!_jvmti_can_access_local_variables &&
333 JvmtiExport::can_access_local_variables()) {
334 return true;
335 }
336 if (!_jvmti_can_hotswap_or_post_breakpoint &&
337 JvmtiExport::can_hotswap_or_post_breakpoint()) {
338 return true;
339 }
340 if (!_jvmti_can_post_on_exceptions &&
341 JvmtiExport::can_post_on_exceptions()) {
342 return true;
343 }
344 if (!_jvmti_can_pop_frame &&
345 JvmtiExport::can_pop_frame()) {
346 return true;
347 }
348 if (!_jvmti_can_get_owned_monitor_info &&
349 JvmtiExport::can_get_owned_monitor_info()) {
350 return true;
351 }
352 if (!_jvmti_can_walk_any_space &&
353 JvmtiExport::can_walk_any_space()) {
354 return true;
355 }
356
357 return false;
358 }
359
360 // ------------------------------------------------------------------
361 // Cache DTrace flags
362 void ciEnv::cache_dtrace_flags() {
363 // Need lock?
364 _dtrace_method_probes = DTraceMethodProbes;
365 _dtrace_alloc_probes = DTraceAllocProbes;
366 }
367
368 // ------------------------------------------------------------------
369 // helper for lazy exception creation
370 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
371 VM_ENTRY_MARK;
372 if (handle == nullptr) {
373 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
374 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
375 jobject objh = nullptr;
376 if (ik != nullptr) {
377 oop obj = ik->allocate_instance(THREAD);
378 if (!HAS_PENDING_EXCEPTION)
379 objh = JNIHandles::make_global(Handle(THREAD, obj));
380 }
381 if (HAS_PENDING_EXCEPTION) {
382 CLEAR_PENDING_EXCEPTION;
383 } else {
384 handle = objh;
385 }
386 }
387 oop obj = JNIHandles::resolve(handle);
388 return obj == nullptr? nullptr: get_object(obj)->as_instance();
389 }
390
391 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
392 switch (type) {
393 case T_BOOLEAN: return Boolean_klass();
394 case T_BYTE : return Byte_klass();
395 case T_CHAR : return Character_klass();
396 case T_SHORT : return Short_klass();
397 case T_INT : return Integer_klass();
398 case T_LONG : return Long_klass();
399 case T_FLOAT : return Float_klass();
400 case T_DOUBLE : return Double_klass();
401
402 default:
403 assert(false, "not a primitive: %s", type2name(type));
404 return nullptr;
405 }
406 }
407
408 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
409 if (_ArrayIndexOutOfBoundsException_instance == nullptr) {
410 _ArrayIndexOutOfBoundsException_instance
411 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
412 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
413 }
414 return _ArrayIndexOutOfBoundsException_instance;
415 }
416 ciInstance* ciEnv::ArrayStoreException_instance() {
417 if (_ArrayStoreException_instance == nullptr) {
418 _ArrayStoreException_instance
419 = get_or_create_exception(_ArrayStoreException_handle,
420 vmSymbols::java_lang_ArrayStoreException());
421 }
422 return _ArrayStoreException_instance;
423 }
424 ciInstance* ciEnv::ClassCastException_instance() {
425 if (_ClassCastException_instance == nullptr) {
426 _ClassCastException_instance
427 = get_or_create_exception(_ClassCastException_handle,
428 vmSymbols::java_lang_ClassCastException());
429 }
430 return _ClassCastException_instance;
431 }
432
433 ciInstance* ciEnv::the_null_string() {
434 if (_the_null_string == nullptr) {
435 VM_ENTRY_MARK;
436 _the_null_string = get_object(Universe::the_null_string())->as_instance();
437 }
438 return _the_null_string;
439 }
440
441 ciInstance* ciEnv::the_min_jint_string() {
442 if (_the_min_jint_string == nullptr) {
443 VM_ENTRY_MARK;
444 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
445 }
446 return _the_min_jint_string;
447 }
448
449 // ------------------------------------------------------------------
450 // ciEnv::get_method_from_handle
451 ciMethod* ciEnv::get_method_from_handle(Method* method) {
452 VM_ENTRY_MARK;
453 return get_metadata(method)->as_method();
454 }
455
456 // ------------------------------------------------------------------
457 // ciEnv::check_klass_accessiblity
458 //
459 // Note: the logic of this method should mirror the logic of
460 // ConstantPool::verify_constant_pool_resolve.
461 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
462 Klass* resolved_klass) {
463 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
464 return true;
465 }
466 if (accessing_klass->is_obj_array_klass()) {
467 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
468 }
469 if (!accessing_klass->is_instance_klass()) {
470 return true;
471 }
472
473 if (resolved_klass->is_objArray_klass()) {
474 // Find the element klass, if this is an array.
475 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
476 }
477 if (resolved_klass->is_instance_klass()) {
478 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
479 InstanceKlass::cast(resolved_klass),
480 true) == Reflection::ACCESS_OK);
481 }
482 return true;
483 }
484
485 // ------------------------------------------------------------------
486 // ciEnv::get_klass_by_name_impl
487 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
488 const constantPoolHandle& cpool,
489 ciSymbol* name,
490 bool require_local) {
491 ASSERT_IN_VM;
492 Thread* current = Thread::current();
493
494 // Now we need to check the SystemDictionary
495 Symbol* sym = name->get_symbol();
496 if (Signature::has_envelope(sym)) {
497 // This is a name from a signature. Strip off the trimmings.
498 // Call recursive to keep scope of strippedsym.
499 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
500 ciSymbol* strippedname = get_symbol(strippedsym);
501 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
502 }
503
504 // Check for prior unloaded klass. The SystemDictionary's answers
505 // can vary over time but the compiler needs consistency.
506 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
507 if (unloaded_klass != nullptr) {
508 if (require_local) return nullptr;
509 return unloaded_klass;
510 }
511
512 Handle loader;
513 Handle domain;
514 if (accessing_klass != nullptr) {
515 loader = Handle(current, accessing_klass->loader());
516 domain = Handle(current, accessing_klass->protection_domain());
517 }
518
519 Klass* found_klass = require_local ?
520 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
521 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
522
523 // If we fail to find an array klass, look again for its element type.
524 // The element type may be available either locally or via constraints.
525 // In either case, if we can find the element type in the system dictionary,
526 // we must build an array type around it. The CI requires array klasses
527 // to be loaded if their element klasses are loaded, except when memory
528 // is exhausted.
529 if (Signature::is_array(sym) &&
530 (sym->char_at(1) == JVM_SIGNATURE_ARRAY || sym->char_at(1) == JVM_SIGNATURE_CLASS)) {
531 // We have an unloaded array.
532 // Build it on the fly if the element class exists.
533 SignatureStream ss(sym, false);
534 ss.skip_array_prefix(1);
535 // Get element ciKlass recursively.
536 ciKlass* elem_klass =
537 get_klass_by_name_impl(accessing_klass,
538 cpool,
539 get_symbol(ss.as_symbol()),
540 require_local);
541 if (elem_klass != nullptr && elem_klass->is_loaded()) {
542 // Now make an array for it
543 return ciObjArrayKlass::make_impl(elem_klass);
544 }
545 }
546
547 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
548 // Look inside the constant pool for pre-resolved class entries.
549 for (int i = cpool->length() - 1; i >= 1; i--) {
550 if (cpool->tag_at(i).is_klass()) {
551 Klass* kls = cpool->resolved_klass_at(i);
552 if (kls->name() == sym) {
553 found_klass = kls;
554 break;
555 }
556 }
557 }
558 }
559
560 if (found_klass != nullptr) {
561 // Found it. Build a CI handle.
562 return get_klass(found_klass);
563 }
564
565 if (require_local) return nullptr;
566
567 // Not yet loaded into the VM, or not governed by loader constraints.
568 // Make a CI representative for it.
569 return get_unloaded_klass(accessing_klass, name);
570 }
571
572 // ------------------------------------------------------------------
573 // ciEnv::get_klass_by_name
574 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
575 ciSymbol* klass_name,
576 bool require_local) {
577 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
578 constantPoolHandle(),
579 klass_name,
580 require_local);)
581 }
582
583 // ------------------------------------------------------------------
584 // ciEnv::get_klass_by_index_impl
585 //
586 // Implementation of get_klass_by_index.
587 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
588 int index,
589 bool& is_accessible,
590 ciInstanceKlass* accessor) {
591 Klass* klass = nullptr;
592 Symbol* klass_name = nullptr;
593
594 if (cpool->tag_at(index).is_symbol()) {
595 klass_name = cpool->symbol_at(index);
596 } else {
597 // Check if it's resolved if it's not a symbol constant pool entry.
598 klass = ConstantPool::klass_at_if_loaded(cpool, index);
599 // Try to look it up by name.
600 if (klass == nullptr) {
601 klass_name = cpool->klass_name_at(index);
602 }
603 }
604
605 if (klass == nullptr) {
606 // Not found in constant pool. Use the name to do the lookup.
607 ciKlass* k = get_klass_by_name_impl(accessor,
608 cpool,
609 get_symbol(klass_name),
610 false);
611 // Calculate accessibility the hard way.
612 if (!k->is_loaded()) {
613 is_accessible = false;
614 } else if (k->loader() != accessor->loader() &&
615 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
616 // Loaded only remotely. Not linked yet.
617 is_accessible = false;
618 } else {
619 // Linked locally, and we must also check public/private, etc.
620 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
621 }
622 return k;
623 }
624
625 // Check for prior unloaded klass. The SystemDictionary's answers
626 // can vary over time but the compiler needs consistency.
627 ciSymbol* name = get_symbol(klass->name());
628 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
629 if (unloaded_klass != nullptr) {
630 is_accessible = false;
631 return unloaded_klass;
632 }
633
634 // It is known to be accessible, since it was found in the constant pool.
635 ciKlass* ciKlass = get_klass(klass);
636 is_accessible = true;
637 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
638 // Klass was unresolved at replay dump time and therefore not accessible.
639 is_accessible = false;
640 }
641 return ciKlass;
642 }
643
644 // ------------------------------------------------------------------
645 // ciEnv::get_klass_by_index
646 //
647 // Get a klass from the constant pool.
648 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
649 int index,
650 bool& is_accessible,
651 ciInstanceKlass* accessor) {
652 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
653 }
654
655 // ------------------------------------------------------------------
656 // ciEnv::unbox_primitive_value
657 //
658 // Unbox a primitive and return it as a ciConstant.
659 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
660 jvalue value;
661 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
662 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
663 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
664 return ciConstant();
665 }
666 switch (bt) {
667 case T_BOOLEAN: return ciConstant(bt, value.z);
668 case T_BYTE: return ciConstant(bt, value.b);
669 case T_SHORT: return ciConstant(bt, value.s);
670 case T_CHAR: return ciConstant(bt, value.c);
671 case T_INT: return ciConstant(bt, value.i);
672 case T_LONG: return ciConstant(value.j);
673 case T_FLOAT: return ciConstant(value.f);
674 case T_DOUBLE: return ciConstant(value.d);
675
676 default:
677 assert(false, "not a primitive type: %s", type2name(bt));
678 return ciConstant();
679 }
680 }
681
682 // ------------------------------------------------------------------
683 // ciEnv::get_resolved_constant
684 //
685 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
686 assert(obj_index >= 0, "");
687 oop obj = cpool->resolved_reference_at(obj_index);
688 if (obj == nullptr) {
689 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
690 // Null constant is represented as a sentinel (non-null) value.
691 return ciConstant();
692 } else if (obj == Universe::the_null_sentinel()) {
693 return ciConstant(T_OBJECT, get_object(nullptr));
694 } else {
695 ciObject* ciobj = get_object(obj);
696 if (ciobj->is_array()) {
697 return ciConstant(T_ARRAY, ciobj);
698 } else {
699 int cp_index = cpool->object_to_cp_index(obj_index);
700 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
701 if (is_java_primitive(bt)) {
702 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
703 return unbox_primitive_value(ciobj, bt);
704 } else {
705 assert(ciobj->is_instance(), "should be an instance");
706 return ciConstant(T_OBJECT, ciobj);
707 }
708 }
709 }
710 }
711
712 // ------------------------------------------------------------------
713 // ciEnv::get_constant_by_index_impl
714 //
715 // Implementation of get_constant_by_index().
716 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
717 int index, int obj_index,
718 ciInstanceKlass* accessor) {
719 if (obj_index >= 0) {
720 ciConstant con = get_resolved_constant(cpool, obj_index);
721 if (con.is_valid()) {
722 return con;
723 }
724 }
725 constantTag tag = cpool->tag_at(index);
726 if (tag.is_int()) {
727 return ciConstant(T_INT, (jint)cpool->int_at(index));
728 } else if (tag.is_long()) {
729 return ciConstant((jlong)cpool->long_at(index));
730 } else if (tag.is_float()) {
731 return ciConstant((jfloat)cpool->float_at(index));
732 } else if (tag.is_double()) {
733 return ciConstant((jdouble)cpool->double_at(index));
734 } else if (tag.is_string()) {
735 EXCEPTION_CONTEXT;
736 assert(obj_index >= 0, "should have an object index");
737 oop string = cpool->string_at(index, obj_index, THREAD);
738 if (HAS_PENDING_EXCEPTION) {
739 CLEAR_PENDING_EXCEPTION;
740 record_out_of_memory_failure();
741 return ciConstant();
742 }
743 ciInstance* constant = get_object(string)->as_instance();
744 return ciConstant(T_OBJECT, constant);
745 } else if (tag.is_unresolved_klass_in_error()) {
746 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
747 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
748 bool will_link;
749 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
750 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
751 return ciConstant(T_OBJECT, mirror);
752 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
753 // must execute Java code to link this CP entry into cache[i].f1
754 assert(obj_index >= 0, "should have an object index");
755 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
756 ciObject* ciobj = get_unloaded_method_type_constant(signature);
757 return ciConstant(T_OBJECT, ciobj);
758 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
759 // must execute Java code to link this CP entry into cache[i].f1
760 assert(obj_index >= 0, "should have an object index");
761 bool ignore_will_link;
762 int ref_kind = cpool->method_handle_ref_kind_at(index);
763 int callee_index = cpool->method_handle_klass_index_at(index);
764 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
765 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
766 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
767 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
768 return ciConstant(T_OBJECT, ciobj);
769 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
770 assert(obj_index >= 0, "should have an object index");
771 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
772 } else {
773 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
774 return ciConstant();
775 }
776 }
777
778 // ------------------------------------------------------------------
779 // ciEnv::get_constant_by_index
780 //
781 // Pull a constant out of the constant pool. How appropriate.
782 //
783 // Implementation note: this query is currently in no way cached.
784 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
785 int pool_index, int cache_index,
786 ciInstanceKlass* accessor) {
787 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
788 }
789
790 // ------------------------------------------------------------------
791 // ciEnv::get_field_by_index_impl
792 //
793 // Implementation of get_field_by_index.
794 //
795 // Implementation note: the results of field lookups are cached
796 // in the accessor klass.
797 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
798 int index, Bytecodes::Code bc) {
799 ciConstantPoolCache* cache = accessor->field_cache();
800 if (cache == nullptr) {
801 ciField* field = new (arena()) ciField(accessor, index, bc);
802 return field;
803 } else {
804 ciField* field = (ciField*)cache->get(index);
805 if (field == nullptr) {
806 field = new (arena()) ciField(accessor, index, bc);
807 cache->insert(index, field);
808 }
809 return field;
810 }
811 }
812
813 // ------------------------------------------------------------------
814 // ciEnv::get_field_by_index
815 //
816 // Get a field by index from a klass's constant pool.
817 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
818 int index, Bytecodes::Code bc) {
819 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
820 }
821
822 // ------------------------------------------------------------------
823 // ciEnv::lookup_method
824 //
825 // Perform an appropriate method lookup based on accessor, holder,
826 // name, signature, and bytecode.
827 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
828 ciKlass* holder,
829 Symbol* name,
830 Symbol* sig,
831 Bytecodes::Code bc,
832 constantTag tag) {
833 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
834 Klass* holder_klass = holder->get_Klass();
835
836 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
837 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
838
839 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
840 LinkInfo::AccessCheck::required,
841 LinkInfo::LoaderConstraintCheck::required,
842 tag);
843 switch (bc) {
844 case Bytecodes::_invokestatic:
845 return LinkResolver::resolve_static_call_or_null(link_info);
846 case Bytecodes::_invokespecial:
847 return LinkResolver::resolve_special_call_or_null(link_info);
848 case Bytecodes::_invokeinterface:
849 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
850 case Bytecodes::_invokevirtual:
851 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
852 default:
853 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
854 return nullptr; // silence compiler warnings
855 }
856 }
857
858
859 // ------------------------------------------------------------------
860 // ciEnv::get_method_by_index_impl
861 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
862 int index, Bytecodes::Code bc,
863 ciInstanceKlass* accessor) {
864 assert(cpool.not_null(), "need constant pool");
865 assert(accessor != nullptr, "need origin of access");
866 if (bc == Bytecodes::_invokedynamic) {
867 // FIXME: code generation could allow for null (unlinked) call site
868 // The call site could be made patchable as follows:
869 // Load the appendix argument from the constant pool.
870 // Test the appendix argument and jump to a known deopt routine if it is null.
871 // Jump through a patchable call site, which is initially a deopt routine.
872 // Patch the call site to the nmethod entry point of the static compiled lambda form.
873 // As with other two-component call sites, both values must be independently verified.
874 int indy_index = cpool->decode_invokedynamic_index(index);
875 assert (indy_index >= 0, "should be");
876 assert(indy_index < cpool->cache()->resolved_indy_entries_length(), "impossible");
877 Method* adapter = cpool->resolved_indy_entry_at(indy_index)->method();
878 // Resolved if the adapter is non null.
879 if (adapter != nullptr) {
880 return get_method(adapter);
881 }
882
883 // Fake a method that is equivalent to a declared method.
884 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
885 ciSymbol* name = ciSymbols::invokeBasic_name();
886 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
887 return get_unloaded_method(holder, name, signature, accessor);
888 } else {
889 const int holder_index = cpool->klass_ref_index_at(index, bc);
890 bool holder_is_accessible;
891 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
892
893 // Get the method's name and signature.
894 Symbol* name_sym = cpool->name_ref_at(index, bc);
895 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
896
897 if (cpool->has_preresolution()
898 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
899 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
900 // Short-circuit lookups for JSR 292-related call sites.
901 // That is, do not rely only on name-based lookups, because they may fail
902 // if the names are not resolvable in the boot class loader (7056328).
903 switch (bc) {
904 case Bytecodes::_invokevirtual:
905 case Bytecodes::_invokeinterface:
906 case Bytecodes::_invokespecial:
907 case Bytecodes::_invokestatic:
908 {
909 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
910 if (m != nullptr) {
911 return get_method(m);
912 }
913 }
914 break;
915 default:
916 break;
917 }
918 }
919
920 if (holder_is_accessible) { // Our declared holder is loaded.
921 constantTag tag = cpool->tag_ref_at(index, bc);
922 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
923 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
924 if (m != nullptr &&
925 (bc == Bytecodes::_invokestatic
926 ? m->method_holder()->is_not_initialized()
927 : !m->method_holder()->is_loaded())) {
928 m = nullptr;
929 }
930 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
931 m = nullptr;
932 }
933 if (m != nullptr) {
934 // We found the method.
935 return get_method(m);
936 }
937 }
938
939 // Either the declared holder was not loaded, or the method could
940 // not be found. Create a dummy ciMethod to represent the failed
941 // lookup.
942 ciSymbol* name = get_symbol(name_sym);
943 ciSymbol* signature = get_symbol(sig_sym);
944 return get_unloaded_method(holder, name, signature, accessor);
945 }
946 }
947
948
949 // ------------------------------------------------------------------
950 // ciEnv::get_instance_klass_for_declared_method_holder
951 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
952 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
953 // instead of a ciInstanceKlass. For that case simply pretend that the
954 // declared holder is Object.clone since that's where the call will bottom out.
955 // A more correct fix would trickle out through many interfaces in CI,
956 // requiring ciInstanceKlass* to become ciKlass* and many more places would
957 // require checks to make sure the expected type was found. Given that this
958 // only occurs for clone() the more extensive fix seems like overkill so
959 // instead we simply smear the array type into Object.
960 guarantee(method_holder != nullptr, "no method holder");
961 if (method_holder->is_instance_klass()) {
962 return method_holder->as_instance_klass();
963 } else if (method_holder->is_array_klass()) {
964 return current()->Object_klass();
965 } else {
966 ShouldNotReachHere();
967 }
968 return nullptr;
969 }
970
971
972 // ------------------------------------------------------------------
973 // ciEnv::get_method_by_index
974 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
975 int index, Bytecodes::Code bc,
976 ciInstanceKlass* accessor) {
977 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
978 }
979
980
981 // ------------------------------------------------------------------
982 // ciEnv::name_buffer
983 char *ciEnv::name_buffer(int req_len) {
984 if (_name_buffer_len < req_len) {
985 if (_name_buffer == nullptr) {
986 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
987 _name_buffer_len = req_len;
988 } else {
989 _name_buffer =
990 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
991 _name_buffer_len = req_len;
992 }
993 }
994 return _name_buffer;
995 }
996
997 // ------------------------------------------------------------------
998 // ciEnv::is_in_vm
999 bool ciEnv::is_in_vm() {
1000 return JavaThread::current()->thread_state() == _thread_in_vm;
1001 }
1002
1003 // ------------------------------------------------------------------
1004 // ciEnv::validate_compile_task_dependencies
1005 //
1006 // Check for changes during compilation (e.g. class loads, evolution,
1007 // breakpoints, call site invalidation).
1008 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1009 if (failing()) return; // no need for further checks
1010
1011 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1012 if (result != Dependencies::end_marker) {
1013 if (result == Dependencies::call_site_target_value) {
1014 _inc_decompile_count_on_failure = false;
1015 record_failure("call site target change");
1016 } else if (Dependencies::is_klass_type(result)) {
1017 record_failure("concurrent class loading");
1018 } else {
1019 record_failure("invalid non-klass dependency");
1020 }
1021 }
1022 }
1023
1024 // ------------------------------------------------------------------
1025 // ciEnv::register_method
1026 void ciEnv::register_method(ciMethod* target,
1027 int entry_bci,
1028 CodeOffsets* offsets,
1029 int orig_pc_offset,
1030 CodeBuffer* code_buffer,
1031 int frame_words,
1032 OopMapSet* oop_map_set,
1033 ExceptionHandlerTable* handler_table,
1034 ImplicitExceptionTable* inc_table,
1035 AbstractCompiler* compiler,
1036 bool has_unsafe_access,
1037 bool has_wide_vectors,
1038 bool has_monitors,
1039 int immediate_oops_patched,
1040 RTMState rtm_state) {
1041 VM_ENTRY_MARK;
1042 nmethod* nm = nullptr;
1043 {
1044 methodHandle method(THREAD, target->get_Method());
1045
1046 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1047 if (method->get_method_counters(THREAD) == nullptr) {
1048 record_failure("can't create method counters");
1049 // All buffers in the CodeBuffer are allocated in the CodeCache.
1050 // If the code buffer is created on each compile attempt
1051 // as in C2, then it must be freed.
1052 code_buffer->free_blob();
1053 return;
1054 }
1055
1056 // Check if memory should be freed before allocation
1057 CodeCache::gc_on_allocation();
1058
1059 // To prevent compile queue updates.
1060 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1061
1062 // Prevent InstanceKlass::add_to_hierarchy from running
1063 // and invalidating our dependencies until we install this method.
1064 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1065 MutexLocker ml(Compile_lock);
1066 NoSafepointVerifier nsv;
1067
1068 // Change in Jvmti state may invalidate compilation.
1069 if (!failing() && jvmti_state_changed()) {
1070 record_failure("Jvmti state change invalidated dependencies");
1071 }
1072
1073 // Change in DTrace flags may invalidate compilation.
1074 if (!failing() &&
1075 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1076 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1077 record_failure("DTrace flags change invalidated dependencies");
1078 }
1079
1080 if (!failing() && target->needs_clinit_barrier() &&
1081 target->holder()->is_in_error_state()) {
1082 record_failure("method holder is in error state");
1083 }
1084
1085 if (!failing()) {
1086 if (log() != nullptr) {
1087 // Log the dependencies which this compilation declares.
1088 dependencies()->log_all_dependencies();
1089 }
1090
1091 // Encode the dependencies now, so we can check them right away.
1092 dependencies()->encode_content_bytes();
1093
1094 // Check for {class loads, evolution, breakpoints, ...} during compilation
1095 validate_compile_task_dependencies(target);
1096 }
1097 #if INCLUDE_RTM_OPT
1098 if (!failing() && (rtm_state != NoRTM) &&
1099 (method()->method_data() != nullptr) &&
1100 (method()->method_data()->rtm_state() != rtm_state)) {
1101 // Preemptive decompile if rtm state was changed.
1102 record_failure("RTM state change invalidated rtm code");
1103 }
1104 #endif
1105
1106 if (failing()) {
1107 // While not a true deoptimization, it is a preemptive decompile.
1108 MethodData* mdo = method()->method_data();
1109 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1110 mdo->inc_decompile_count();
1111 }
1112
1113 // All buffers in the CodeBuffer are allocated in the CodeCache.
1114 // If the code buffer is created on each compile attempt
1115 // as in C2, then it must be freed.
1116 code_buffer->free_blob();
1117 return;
1118 }
1119
1120 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1121 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1122
1123 nm = nmethod::new_nmethod(method,
1124 compile_id(),
1125 entry_bci,
1126 offsets,
1127 orig_pc_offset,
1128 debug_info(), dependencies(), code_buffer,
1129 frame_words, oop_map_set,
1130 handler_table, inc_table,
1131 compiler, CompLevel(task()->comp_level()));
1132
1133 // Free codeBlobs
1134 code_buffer->free_blob();
1135
1136 if (nm != nullptr) {
1137 nm->set_has_unsafe_access(has_unsafe_access);
1138 nm->set_has_wide_vectors(has_wide_vectors);
1139 nm->set_has_monitors(has_monitors);
1140 assert(!method->is_synchronized() || nm->has_monitors(), "");
1141 #if INCLUDE_RTM_OPT
1142 nm->set_rtm_state(rtm_state);
1143 #endif
1144
1145 if (entry_bci == InvocationEntryBci) {
1146 if (TieredCompilation) {
1147 // If there is an old version we're done with it
1148 CompiledMethod* old = method->code();
1149 if (TraceMethodReplacement && old != nullptr) {
1150 ResourceMark rm;
1151 char *method_name = method->name_and_sig_as_C_string();
1152 tty->print_cr("Replacing method %s", method_name);
1153 }
1154 if (old != nullptr) {
1155 old->make_not_used();
1156 }
1157 }
1158
1159 LogTarget(Info, nmethod, install) lt;
1160 if (lt.is_enabled()) {
1161 ResourceMark rm;
1162 char *method_name = method->name_and_sig_as_C_string();
1163 lt.print("Installing method (%d) %s ",
1164 task()->comp_level(), method_name);
1165 }
1166 // Allow the code to be executed
1167 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1168 if (nm->make_in_use()) {
1169 method->set_code(method, nm);
1170 }
1171 } else {
1172 LogTarget(Info, nmethod, install) lt;
1173 if (lt.is_enabled()) {
1174 ResourceMark rm;
1175 char *method_name = method->name_and_sig_as_C_string();
1176 lt.print("Installing osr method (%d) %s @ %d",
1177 task()->comp_level(), method_name, entry_bci);
1178 }
1179 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1180 if (nm->make_in_use()) {
1181 method->method_holder()->add_osr_nmethod(nm);
1182 }
1183 }
1184 }
1185 }
1186
1187 NoSafepointVerifier nsv;
1188 if (nm != nullptr) {
1189 // Compilation succeeded, post what we know about it
1190 nm->post_compiled_method(task());
1191 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1192 } else {
1193 // The CodeCache is full.
1194 record_failure("code cache is full");
1195 }
1196
1197 // safepoints are allowed again
1198 }
1199
1200 // ------------------------------------------------------------------
1201 // ciEnv::find_system_klass
1202 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1203 VM_ENTRY_MARK;
1204 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1205 }
1206
1207 // ------------------------------------------------------------------
1208 // ciEnv::comp_level
1209 int ciEnv::comp_level() {
1210 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1211 return task()->comp_level();
1212 }
1213
1214 // ------------------------------------------------------------------
1215 // ciEnv::compile_id
1216 int ciEnv::compile_id() {
1217 if (task() == nullptr) return 0;
1218 return task()->compile_id();
1219 }
1220
1221 // ------------------------------------------------------------------
1222 // ciEnv::notice_inlined_method()
1223 void ciEnv::notice_inlined_method(ciMethod* method) {
1224 _num_inlined_bytecodes += method->code_size_for_inlining();
1225 }
1226
1227 // ------------------------------------------------------------------
1228 // ciEnv::num_inlined_bytecodes()
1229 int ciEnv::num_inlined_bytecodes() const {
1230 return _num_inlined_bytecodes;
1231 }
1232
1233 // ------------------------------------------------------------------
1234 // ciEnv::record_failure()
1235 void ciEnv::record_failure(const char* reason) {
1236 if (_failure_reason == nullptr) {
1237 // Record the first failure reason.
1238 _failure_reason = reason;
1239 }
1240 }
1241
1242 void ciEnv::report_failure(const char* reason) {
1243 EventCompilationFailure event;
1244 if (event.should_commit()) {
1245 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1246 }
1247 }
1248
1249 // ------------------------------------------------------------------
1250 // ciEnv::record_method_not_compilable()
1251 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1252 int new_compilable =
1253 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1254
1255 // Only note transitions to a worse state
1256 if (new_compilable > _compilable) {
1257 if (log() != nullptr) {
1258 if (all_tiers) {
1259 log()->elem("method_not_compilable");
1260 } else {
1261 log()->elem("method_not_compilable_at_tier level='%d'",
1262 current()->task()->comp_level());
1263 }
1264 }
1265 _compilable = new_compilable;
1266
1267 // Reset failure reason; this one is more important.
1268 _failure_reason = nullptr;
1269 record_failure(reason);
1270 }
1271 }
1272
1273 // ------------------------------------------------------------------
1274 // ciEnv::record_out_of_memory_failure()
1275 void ciEnv::record_out_of_memory_failure() {
1276 // If memory is low, we stop compiling methods.
1277 record_method_not_compilable("out of memory");
1278 }
1279
1280 ciInstance* ciEnv::unloaded_ciinstance() {
1281 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1282 }
1283
1284 // ------------------------------------------------------------------
1285 // Replay support
1286
1287
1288 // Lookup location descriptor for the class, if any.
1289 // Returns false if not found.
1290 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1291 bool found = false;
1292 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1293 if (!found) {
1294 return false;
1295 }
1296 loc = _dyno_locs->at(pos);
1297 return found;
1298 }
1299
1300 // Associate the current location descriptor with the given class and record for later lookup.
1301 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1302 const char *loc = os::strdup(_dyno_name);
1303 bool found = false;
1304 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1305 if (found) {
1306 _dyno_locs->at_put(pos, loc);
1307 } else {
1308 _dyno_klasses->insert_before(pos, ik);
1309 _dyno_locs->insert_before(pos, loc);
1310 }
1311 }
1312
1313 // Associate the current location descriptor with the given class and record for later lookup.
1314 // If it turns out that there are multiple locations for the given class, that conflict should
1315 // be handled here. Currently we choose the first location found.
1316 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1317 if (!ik->is_hidden()) {
1318 return;
1319 }
1320 const char *loc0;
1321 if (!dyno_loc(ik, loc0)) {
1322 set_dyno_loc(ik);
1323 }
1324 }
1325
1326 // Look up the location descriptor for the given class and print it to the output stream.
1327 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1328 const char *loc;
1329 if (dyno_loc(ik, loc)) {
1330 out->print("%s", loc);
1331 return true;
1332 } else {
1333 return false;
1334 }
1335 }
1336
1337 // Look up the location descriptor for the given class and return it as a string.
1338 // Returns null if no location is found.
1339 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1340 if (ik->is_hidden()) {
1341 stringStream ss;
1342 if (print_dyno_loc(&ss, ik)) {
1343 ss.print(" ;"); // add terminator
1344 const char* call_site = ss.as_string();
1345 return call_site;
1346 }
1347 }
1348 return nullptr;
1349 }
1350
1351 // Look up the location descriptor for the given class and return it as a string.
1352 // Returns the class name as a fallback if no location is found.
1353 const char *ciEnv::replay_name(ciKlass* k) const {
1354 if (k->is_instance_klass()) {
1355 return replay_name(k->as_instance_klass()->get_instanceKlass());
1356 }
1357 return k->name()->as_quoted_ascii();
1358 }
1359
1360 // Look up the location descriptor for the given class and return it as a string.
1361 // Returns the class name as a fallback if no location is found.
1362 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1363 const char* name = dyno_name(ik);
1364 if (name != nullptr) {
1365 return name;
1366 }
1367 return ik->name()->as_quoted_ascii();
1368 }
1369
1370 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1371 void ciEnv::record_member(Thread* thread, oop member) {
1372 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1373 // Check MemberName.clazz field
1374 oop clazz = java_lang_invoke_MemberName::clazz(member);
1375 if (clazz->klass()->is_instance_klass()) {
1376 RecordLocation fp(this, "clazz");
1377 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1378 record_best_dyno_loc(ik);
1379 }
1380 // Check MemberName.method.vmtarget field
1381 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1382 if (vmtarget != nullptr) {
1383 RecordLocation fp2(this, "<vmtarget>");
1384 InstanceKlass* ik = vmtarget->method_holder();
1385 record_best_dyno_loc(ik);
1386 }
1387 }
1388
1389 // Read an object field. Lookup is done by name only.
1390 static inline oop obj_field(oop obj, const char* name) {
1391 return ciReplay::obj_field(obj, name);
1392 }
1393
1394 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1395 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1396 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1397
1398 {
1399 // Check LambdaForm.vmentry field
1400 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1401 RecordLocation fp0(this, "vmentry");
1402 record_member(thread, member);
1403 }
1404
1405 // Check LambdaForm.names array
1406 objArrayOop names = (objArrayOop)obj_field(form, "names");
1407 if (names != nullptr) {
1408 RecordLocation lp0(this, "names");
1409 int len = names->length();
1410 for (int i = 0; i < len; ++i) {
1411 oop name = names->obj_at(i);
1412 RecordLocation lp1(this, "%d", i);
1413 // Check LambdaForm.names[i].function field
1414 RecordLocation lp2(this, "function");
1415 oop function = obj_field(name, "function");
1416 if (function != nullptr) {
1417 // Check LambdaForm.names[i].function.member field
1418 oop member = obj_field(function, "member");
1419 if (member != nullptr) {
1420 RecordLocation lp3(this, "member");
1421 record_member(thread, member);
1422 }
1423 // Check LambdaForm.names[i].function.resolvedHandle field
1424 oop mh = obj_field(function, "resolvedHandle");
1425 if (mh != nullptr) {
1426 RecordLocation lp3(this, "resolvedHandle");
1427 record_mh(thread, mh);
1428 }
1429 // Check LambdaForm.names[i].function.invoker field
1430 oop invoker = obj_field(function, "invoker");
1431 if (invoker != nullptr) {
1432 RecordLocation lp3(this, "invoker");
1433 record_mh(thread, invoker);
1434 }
1435 }
1436 }
1437 }
1438 }
1439
1440 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1441 void ciEnv::record_mh(Thread* thread, oop mh) {
1442 {
1443 // Check MethodHandle.form field
1444 oop form = java_lang_invoke_MethodHandle::form(mh);
1445 RecordLocation fp(this, "form");
1446 record_lambdaform(thread, form);
1447 }
1448 // Check DirectMethodHandle.member field
1449 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1450 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1451 RecordLocation fp(this, "member");
1452 record_member(thread, member);
1453 } else {
1454 // Check <MethodHandle subclass>.argL<n> fields
1455 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1456 char arg_name[] = "argLXX";
1457 int max_arg = 99;
1458 for (int index = 0; index <= max_arg; ++index) {
1459 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1460 oop arg = obj_field(mh, arg_name);
1461 if (arg != nullptr) {
1462 RecordLocation fp(this, "%s", arg_name);
1463 if (arg->klass()->is_instance_klass()) {
1464 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1465 record_best_dyno_loc(ik2);
1466 record_call_site_obj(thread, arg);
1467 }
1468 } else {
1469 break;
1470 }
1471 }
1472 }
1473 }
1474
1475 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1476 // Types currently supported are MethodHandle and CallSite.
1477 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1478 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1479 {
1480 if (obj != nullptr) {
1481 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1482 record_mh(thread, obj);
1483 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1484 oop target = java_lang_invoke_CallSite::target(obj);
1485 if (target->klass()->is_instance_klass()) {
1486 RecordLocation fp(this, "target");
1487 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1488 record_best_dyno_loc(ik);
1489 }
1490 }
1491 }
1492 }
1493
1494 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1495 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1496 InstanceKlass* holder = adapter->method_holder();
1497 if (!holder->is_hidden()) {
1498 return;
1499 }
1500 RecordLocation fp(this, "<adapter>");
1501 record_best_dyno_loc(holder);
1502 }
1503
1504 // Process an invokedynamic call site and record any dynamic locations.
1505 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1506 int index = cp->decode_invokedynamic_index(indy_index);
1507 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(index);
1508 if (indy_info->method() != nullptr) {
1509 // process the adapter
1510 Method* adapter = indy_info->method();
1511 record_call_site_method(thread, adapter);
1512 // process the appendix
1513 oop appendix = cp->resolved_reference_from_indy(index);
1514 {
1515 RecordLocation fp(this, "<appendix>");
1516 record_call_site_obj(thread, appendix);
1517 }
1518 // process the BSM
1519 int pool_index = indy_info->constant_pool_index();
1520 BootstrapInfo bootstrap_specifier(cp, pool_index, index);
1521 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1522 {
1523 RecordLocation fp(this, "<bsm>");
1524 record_call_site_obj(thread, bsm);
1525 }
1526 }
1527 }
1528
1529 // Process an invokehandle call site and record any dynamic locations.
1530 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1531 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1532 if (!cp->tag_at(holder_index).is_klass()) {
1533 return; // not resolved
1534 }
1535 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1536 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1537 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1538 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index);
1539 if (method_entry->is_resolved(Bytecodes::_invokehandle)) {
1540 // process the adapter
1541 Method* adapter = method_entry->method();
1542 oop appendix = cp->cache()->appendix_if_resolved(method_entry);
1543 record_call_site_method(thread, adapter);
1544 // process the appendix
1545 {
1546 RecordLocation fp(this, "<appendix>");
1547 record_call_site_obj(thread, appendix);
1548 }
1549 }
1550 }
1551 }
1552
1553 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1554 // constant pool entries and record for future lookup.
1555 void ciEnv::find_dynamic_call_sites() {
1556 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1557 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1558
1559 // Iterate over the class hierarchy
1560 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1561 Klass* sub = iter.klass();
1562 if (sub->is_instance_klass()) {
1563 InstanceKlass *isub = InstanceKlass::cast(sub);
1564 InstanceKlass* ik = isub;
1565 if (!ik->is_linked()) {
1566 continue;
1567 }
1568 if (ik->is_hidden()) {
1569 continue;
1570 }
1571 JavaThread* thread = JavaThread::current();
1572 const constantPoolHandle pool(thread, ik->constants());
1573
1574 // Look for invokedynamic/invokehandle call sites
1575 for (int i = 0; i < ik->methods()->length(); ++i) {
1576 Method* m = ik->methods()->at(i);
1577
1578 BytecodeStream bcs(methodHandle(thread, m));
1579 while (!bcs.is_last_bytecode()) {
1580 Bytecodes::Code opcode = bcs.next();
1581 opcode = bcs.raw_code();
1582 switch (opcode) {
1583 case Bytecodes::_invokedynamic:
1584 case Bytecodes::_invokehandle: {
1585 RecordLocation fp(this, "@bci %s %s %s %d",
1586 ik->name()->as_quoted_ascii(),
1587 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1588 bcs.bci());
1589 if (opcode == Bytecodes::_invokedynamic) {
1590 int index = bcs.get_index_u4();
1591 process_invokedynamic(pool, index, thread);
1592 } else {
1593 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1594 int cp_cache_index = bcs.get_index_u2();
1595 process_invokehandle(pool, cp_cache_index, thread);
1596 }
1597 break;
1598 }
1599 default:
1600 break;
1601 }
1602 }
1603 }
1604
1605 // Look for MethodHandle constant pool entries
1606 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1607 int len = pool->length();
1608 for (int i = 0; i < len; ++i) {
1609 if (pool->tag_at(i).is_method_handle()) {
1610 bool found_it;
1611 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1612 if (mh != nullptr) {
1613 RecordLocation fp(this, "%d", i);
1614 record_mh(thread, mh);
1615 }
1616 }
1617 }
1618 }
1619 }
1620 }
1621
1622 void ciEnv::dump_compile_data(outputStream* out) {
1623 CompileTask* task = this->task();
1624 if (task) {
1625 #ifdef COMPILER2
1626 if (ReplayReduce && compiler_data() != nullptr) {
1627 // Dump C2 "reduced" inlining data.
1628 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1629 }
1630 #endif
1631 Method* method = task->method();
1632 int entry_bci = task->osr_bci();
1633 int comp_level = task->comp_level();
1634 out->print("compile ");
1635 get_method(method)->dump_name_as_ascii(out);
1636 out->print(" %d %d", entry_bci, comp_level);
1637 if (compiler_data() != nullptr) {
1638 if (is_c2_compile(comp_level)) {
1639 #ifdef COMPILER2
1640 // Dump C2 inlining data.
1641 ((Compile*)compiler_data())->dump_inline_data(out);
1642 #endif
1643 } else if (is_c1_compile(comp_level)) {
1644 #ifdef COMPILER1
1645 // Dump C1 inlining data.
1646 ((Compilation*)compiler_data())->dump_inline_data(out);
1647 #endif
1648 }
1649 }
1650 out->cr();
1651 }
1652 }
1653
1654 // Called from VM error reporter, so be careful.
1655 // Don't safepoint or acquire any locks.
1656 //
1657 void ciEnv::dump_replay_data_helper(outputStream* out) {
1658 NoSafepointVerifier no_safepoint;
1659 ResourceMark rm;
1660
1661 dump_replay_data_version(out);
1662 #if INCLUDE_JVMTI
1663 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1664 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1665 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1666 #endif // INCLUDE_JVMTI
1667
1668 find_dynamic_call_sites();
1669
1670 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1671 out->print_cr("# %d ciObject found", objects->length());
1672
1673 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1674 // protection domain to load subsequent classes during replay compilation.
1675 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1676
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 char buffer[64];
1702 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_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::fdopen(fd, "w");
1707 if (replay_data_file != nullptr) {
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 close(fd);
1714 }
1715 }
1716 }
1717 }
1718
1719 void ciEnv::dump_inline_data(int compile_id) {
1720 char buffer[64];
1721 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1722 if (ret > 0) {
1723 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1724 if (fd != -1) {
1725 FILE* inline_data_file = os::fdopen(fd, "w");
1726 if (inline_data_file != nullptr) {
1727 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1728 GUARDED_VM_ENTRY(
1729 MutexLocker ml(Compile_lock);
1730 dump_replay_data_version(&replay_data_stream);
1731 dump_compile_data(&replay_data_stream);
1732 )
1733 replay_data_stream.flush();
1734 tty->print("# Compiler inline data is saved as: ");
1735 tty->print_cr("%s", buffer);
1736 } else {
1737 tty->print_cr("# Can't open file to dump inline data.");
1738 close(fd);
1739 }
1740 }
1741 }
1742 }
1743
1744 void ciEnv::dump_replay_data_version(outputStream* out) {
1745 out->print_cr("version %d", REPLAY_VERSION);
1746 }