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/ciInlineKlass.hpp"
30 #include "ci/ciInstance.hpp"
31 #include "ci/ciInstanceKlass.hpp"
32 #include "ci/ciMethod.hpp"
33 #include "ci/ciNullObject.hpp"
34 #include "ci/ciReplay.hpp"
35 #include "ci/ciSymbols.hpp"
36 #include "ci/ciUtilities.inline.hpp"
37 #include "classfile/javaClasses.hpp"
38 #include "classfile/javaClasses.inline.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/codeCache.hpp"
43 #include "code/scopeDesc.hpp"
44 #include "compiler/compilationLog.hpp"
45 #include "compiler/compilationPolicy.hpp"
46 #include "compiler/compileBroker.hpp"
47 #include "compiler/compilerEvent.hpp"
48 #include "compiler/compileLog.hpp"
49 #include "compiler/compileTask.hpp"
50 #include "compiler/disassembler.hpp"
51 #include "gc/shared/collectedHeap.inline.hpp"
52 #include "interpreter/bytecodeStream.hpp"
53 #include "interpreter/linkResolver.hpp"
54 #include "jfr/jfrEvents.hpp"
55 #include "jvm.h"
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 "oops/resolvedIndyEntry.hpp"
69 #include "oops/symbolHandle.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/handles.inline.hpp"
74 #include "runtime/init.hpp"
75 #include "runtime/javaThread.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/safepointVerifiers.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/macros.hpp"
82 #ifdef COMPILER1
83 #include "c1/c1_Runtime1.hpp"
84 #endif
85 #ifdef COMPILER2
86 #include "opto/runtime.hpp"
87 #endif
88
89 // ciEnv
90 //
91 // This class is the top level broker for requests from the compiler
92 // to the VM.
93
94 ciObject* ciEnv::_null_object_instance;
95
96 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
97 VM_CLASSES_DO(VM_CLASS_DEFN)
98 #undef VM_CLASS_DEFN
99
100 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr;
101 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
102 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
103
104 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = nullptr;
105 jobject ciEnv::_ArrayStoreException_handle = nullptr;
106 jobject ciEnv::_ClassCastException_handle = nullptr;
107
108 #ifndef PRODUCT
109 static bool firstEnv = true;
110 #endif /* PRODUCT */
111
112 // ------------------------------------------------------------------
113 // ciEnv::ciEnv
114 ciEnv::ciEnv(CompileTask* task)
115 : _ciEnv_arena(mtCompiler) {
116 VM_ENTRY_MARK;
117
118 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
119 thread->set_env(this);
120 assert(ciEnv::current() == this, "sanity");
121
122 _oop_recorder = nullptr;
123 _debug_info = nullptr;
124 _dependencies = nullptr;
125 _failure_reason = nullptr;
126 _inc_decompile_count_on_failure = true;
127 _compilable = MethodCompilable;
128 _break_at_compile = false;
129 _compiler_data = nullptr;
130 #ifndef PRODUCT
131 assert(!firstEnv, "not initialized properly");
132 #endif /* !PRODUCT */
133
134 _num_inlined_bytecodes = 0;
135 assert(task == nullptr || thread->task() == task, "sanity");
136 if (task != nullptr) {
137 task->mark_started(os::elapsed_counter());
138 }
139 _task = task;
140 _log = nullptr;
141
142 // Temporary buffer for creating symbols and such.
143 _name_buffer = nullptr;
144 _name_buffer_len = 0;
145
146 _arena = &_ciEnv_arena;
147 _factory = new (_arena) ciObjectFactory(_arena, 128);
148
149 // Preload commonly referenced system ciObjects.
150
151 // During VM initialization, these instances have not yet been created.
152 // Assertions ensure that these instances are not accessed before
153 // their initialization.
154
155 assert(Universe::is_fully_initialized(), "should be complete");
156
157 oop o = Universe::null_ptr_exception_instance();
158 assert(o != nullptr, "should have been initialized");
159 _NullPointerException_instance = get_object(o)->as_instance();
160 o = Universe::arithmetic_exception_instance();
161 assert(o != nullptr, "should have been initialized");
162 _ArithmeticException_instance = get_object(o)->as_instance();
163
164 _ArrayIndexOutOfBoundsException_instance = nullptr;
165 _ArrayStoreException_instance = nullptr;
166 _ClassCastException_instance = nullptr;
167 _the_null_string = nullptr;
168 _the_min_jint_string = nullptr;
169
170 _jvmti_redefinition_count = 0;
171 _jvmti_can_hotswap_or_post_breakpoint = false;
172 _jvmti_can_access_local_variables = false;
173 _jvmti_can_post_on_exceptions = false;
174 _jvmti_can_pop_frame = false;
175
176 _dyno_klasses = nullptr;
177 _dyno_locs = nullptr;
178 _dyno_name[0] = '\0';
179 }
180
181 // Record components of a location descriptor string. Components are appended by the constructor and
182 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
183 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
184 //
185 // Example use:
186 //
187 // {
188 // RecordLocation fp(this, "field1");
189 // // location: "field1"
190 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
191 // // location: "field1"
192 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
193 // // location: "field1"
194 // }
195 // // location: ""
196 //
197 // Examples of actual locations
198 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
199 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
200 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
201 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
202 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
203 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
204 class RecordLocation {
205 private:
206 char* end;
207
208 ATTRIBUTE_PRINTF(3, 4)
209 void push(ciEnv* ci, const char* fmt, ...) {
210 va_list args;
211 va_start(args, fmt);
212 push_va(ci, fmt, args);
213 va_end(args);
214 }
215
216 public:
217 ATTRIBUTE_PRINTF(3, 0)
218 void push_va(ciEnv* ci, const char* fmt, va_list args) {
219 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
220 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
221 os::vsnprintf(e, m - e, fmt, args);
222 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
223 }
224
225 // append a new component
226 ATTRIBUTE_PRINTF(3, 4)
227 RecordLocation(ciEnv* ci, const char* fmt, ...) {
228 end = ci->_dyno_name + strlen(ci->_dyno_name);
229 va_list args;
230 va_start(args, fmt);
231 push(ci, " ");
232 push_va(ci, fmt, args);
233 va_end(args);
234 }
235
236 // reset to previous state
237 ~RecordLocation() {
238 *end = '\0';
239 }
240 };
241
242 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
243 ASSERT_IN_VM;
244
245 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
246 CompilerThread* current_thread = CompilerThread::current();
247 assert(current_thread->env() == nullptr, "must be");
248 current_thread->set_env(this);
249 assert(ciEnv::current() == this, "sanity");
250
251 _oop_recorder = nullptr;
252 _debug_info = nullptr;
253 _dependencies = nullptr;
254 _failure_reason = nullptr;
255 _inc_decompile_count_on_failure = true;
256 _compilable = MethodCompilable_never;
257 _break_at_compile = false;
258 _compiler_data = nullptr;
259 #ifndef PRODUCT
260 assert(firstEnv, "must be first");
261 firstEnv = false;
262 #endif /* !PRODUCT */
263
264 _num_inlined_bytecodes = 0;
265 _task = nullptr;
266 _log = nullptr;
267
268 // Temporary buffer for creating symbols and such.
269 _name_buffer = nullptr;
270 _name_buffer_len = 0;
271
272 _arena = arena;
273 _factory = new (_arena) ciObjectFactory(_arena, 128);
274
275 // Preload commonly referenced system ciObjects.
276
277 // During VM initialization, these instances have not yet been created.
278 // Assertions ensure that these instances are not accessed before
279 // their initialization.
280
281 assert(Universe::is_fully_initialized(), "must be");
282
283 _NullPointerException_instance = nullptr;
284 _ArithmeticException_instance = nullptr;
285 _ArrayIndexOutOfBoundsException_instance = nullptr;
286 _ArrayStoreException_instance = nullptr;
287 _ClassCastException_instance = nullptr;
288 _the_null_string = nullptr;
289 _the_min_jint_string = nullptr;
290
291 _jvmti_redefinition_count = 0;
292 _jvmti_can_hotswap_or_post_breakpoint = false;
293 _jvmti_can_access_local_variables = false;
294 _jvmti_can_post_on_exceptions = false;
295 _jvmti_can_pop_frame = false;
296
297 _dyno_klasses = nullptr;
298 _dyno_locs = nullptr;
299 }
300
301 ciEnv::~ciEnv() {
302 GUARDED_VM_ENTRY(
303 CompilerThread* current_thread = CompilerThread::current();
304 _factory->remove_symbols();
305 // Need safepoint to clear the env on the thread. RedefineClasses might
306 // be reading it.
307 current_thread->set_env(nullptr);
308 )
309 }
310
311 // ------------------------------------------------------------------
312 // Cache Jvmti state
313 bool ciEnv::cache_jvmti_state() {
314 VM_ENTRY_MARK;
315 // Get Jvmti capabilities under lock to get consistent values.
316 MutexLocker mu(JvmtiThreadState_lock);
317 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
318 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
319 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
320 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
321 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
322 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
323 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
324 return _task != nullptr && _task->method()->is_old();
325 }
326
327 bool ciEnv::jvmti_state_changed() const {
328 // Some classes were redefined
329 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
330 return true;
331 }
332
333 if (!_jvmti_can_access_local_variables &&
334 JvmtiExport::can_access_local_variables()) {
335 return true;
336 }
337 if (!_jvmti_can_hotswap_or_post_breakpoint &&
338 JvmtiExport::can_hotswap_or_post_breakpoint()) {
339 return true;
340 }
341 if (!_jvmti_can_post_on_exceptions &&
342 JvmtiExport::can_post_on_exceptions()) {
343 return true;
344 }
345 if (!_jvmti_can_pop_frame &&
346 JvmtiExport::can_pop_frame()) {
347 return true;
348 }
349 if (!_jvmti_can_get_owned_monitor_info &&
350 JvmtiExport::can_get_owned_monitor_info()) {
351 return true;
352 }
353 if (!_jvmti_can_walk_any_space &&
354 JvmtiExport::can_walk_any_space()) {
355 return true;
356 }
357
358 return false;
359 }
360
361 // ------------------------------------------------------------------
362 // Cache DTrace flags
363 void ciEnv::cache_dtrace_flags() {
364 // Need lock?
365 _dtrace_method_probes = DTraceMethodProbes;
366 _dtrace_alloc_probes = DTraceAllocProbes;
367 }
368
369 // ------------------------------------------------------------------
370 // helper for lazy exception creation
371 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
372 VM_ENTRY_MARK;
373 if (handle == nullptr) {
374 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
375 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
376 jobject objh = nullptr;
377 if (ik != nullptr) {
378 oop obj = ik->allocate_instance(THREAD);
379 if (!HAS_PENDING_EXCEPTION)
380 objh = JNIHandles::make_global(Handle(THREAD, obj));
381 }
382 if (HAS_PENDING_EXCEPTION) {
383 CLEAR_PENDING_EXCEPTION;
384 } else {
385 handle = objh;
386 }
387 }
388 oop obj = JNIHandles::resolve(handle);
389 return obj == nullptr? nullptr: get_object(obj)->as_instance();
390 }
391
392 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
393 switch (type) {
394 case T_BOOLEAN: return Boolean_klass();
395 case T_BYTE : return Byte_klass();
396 case T_CHAR : return Character_klass();
397 case T_SHORT : return Short_klass();
398 case T_INT : return Integer_klass();
399 case T_LONG : return Long_klass();
400 case T_FLOAT : return Float_klass();
401 case T_DOUBLE : return Double_klass();
402
403 default:
404 assert(false, "not a primitive: %s", type2name(type));
405 return nullptr;
406 }
407 }
408
409 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
410 if (_ArrayIndexOutOfBoundsException_instance == nullptr) {
411 _ArrayIndexOutOfBoundsException_instance
412 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
413 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
414 }
415 return _ArrayIndexOutOfBoundsException_instance;
416 }
417 ciInstance* ciEnv::ArrayStoreException_instance() {
418 if (_ArrayStoreException_instance == nullptr) {
419 _ArrayStoreException_instance
420 = get_or_create_exception(_ArrayStoreException_handle,
421 vmSymbols::java_lang_ArrayStoreException());
422 }
423 return _ArrayStoreException_instance;
424 }
425 ciInstance* ciEnv::ClassCastException_instance() {
426 if (_ClassCastException_instance == nullptr) {
427 _ClassCastException_instance
428 = get_or_create_exception(_ClassCastException_handle,
429 vmSymbols::java_lang_ClassCastException());
430 }
431 return _ClassCastException_instance;
432 }
433
434 ciInstance* ciEnv::the_null_string() {
435 if (_the_null_string == nullptr) {
436 VM_ENTRY_MARK;
437 _the_null_string = get_object(Universe::the_null_string())->as_instance();
438 }
439 return _the_null_string;
440 }
441
442 ciInstance* ciEnv::the_min_jint_string() {
443 if (_the_min_jint_string == nullptr) {
444 VM_ENTRY_MARK;
445 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
446 }
447 return _the_min_jint_string;
448 }
449
450 // ------------------------------------------------------------------
451 // ciEnv::get_method_from_handle
452 ciMethod* ciEnv::get_method_from_handle(Method* method) {
453 VM_ENTRY_MARK;
454 return get_metadata(method)->as_method();
455 }
456
457 // ------------------------------------------------------------------
458 // ciEnv::check_klass_accessiblity
459 //
460 // Note: the logic of this method should mirror the logic of
461 // ConstantPool::verify_constant_pool_resolve.
462 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
463 Klass* resolved_klass) {
464 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
465 return true;
466 }
467 if (accessing_klass->is_obj_array_klass()) {
468 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
469 }
470 if (!accessing_klass->is_instance_klass()) {
471 return true;
472 }
473
474 if (resolved_klass->is_objArray_klass()) {
475 // Find the element klass, if this is an array.
476 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
477 }
478 if (resolved_klass->is_instance_klass()) {
479 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
480 InstanceKlass::cast(resolved_klass),
481 true) == Reflection::ACCESS_OK);
482 }
483 return true;
484 }
485
486 // ------------------------------------------------------------------
487 // ciEnv::get_klass_by_name_impl
488 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
489 const constantPoolHandle& cpool,
490 ciSymbol* name,
491 bool require_local) {
492 ASSERT_IN_VM;
493 Thread* current = Thread::current();
494
495 // Now we need to check the SystemDictionary
496 Symbol* sym = name->get_symbol();
497 if (Signature::has_envelope(sym)) {
498 // This is a name from a signature. Strip off the trimmings.
499 // Call recursive to keep scope of strippedsym.
500 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
501 ciSymbol* strippedname = get_symbol(strippedsym);
502 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
503 }
504
505 // Check for prior unloaded klass. The SystemDictionary's answers
506 // can vary over time but the compiler needs consistency.
507 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
508 if (unloaded_klass != nullptr) {
509 if (require_local) return nullptr;
510 return unloaded_klass;
511 }
512
513 Handle loader;
514 Handle domain;
515 if (accessing_klass != nullptr) {
516 loader = Handle(current, accessing_klass->loader());
517 domain = Handle(current, accessing_klass->protection_domain());
518 }
519
520 Klass* found_klass = require_local ?
521 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
522 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
523
524 // If we fail to find an array klass, look again for its element type.
525 // The element type may be available either locally or via constraints.
526 // In either case, if we can find the element type in the system dictionary,
527 // we must build an array type around it. The CI requires array klasses
528 // to be loaded if their element klasses are loaded, except when memory
529 // is exhausted.
530 if (Signature::is_array(sym) &&
531 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
532 sym->char_at(1) == JVM_SIGNATURE_CLASS )) {
533 // We have an unloaded array.
534 // Build it on the fly if the element class exists.
535 SignatureStream ss(sym, false);
536 ss.skip_array_prefix(1);
537 // Get element ciKlass recursively.
538 ciKlass* elem_klass =
539 get_klass_by_name_impl(accessing_klass,
540 cpool,
541 get_symbol(ss.as_symbol()),
542 require_local);
543 if (elem_klass != nullptr && elem_klass->is_loaded()) {
544 // Now make an array for it
545 return ciArrayKlass::make(elem_klass);
546 }
547 }
548
549 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
550 // Look inside the constant pool for pre-resolved class entries.
551 for (int i = cpool->length() - 1; i >= 1; i--) {
552 if (cpool->tag_at(i).is_klass()) {
553 Klass* kls = cpool->resolved_klass_at(i);
554 if (kls->name() == sym) {
555 found_klass = kls;
556 break;
557 }
558 }
559 }
560 }
561
562 if (found_klass != nullptr) {
563 // Found it. Build a CI handle.
564 return get_klass(found_klass);
565 }
566
567 if (require_local) return nullptr;
568
569 // Not yet loaded into the VM, or not governed by loader constraints.
570 // Make a CI representative for it.
571 int i = 0;
572 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
573 i++;
574 }
575 return get_unloaded_klass(accessing_klass, name);
576 }
577
578 // ------------------------------------------------------------------
579 // ciEnv::get_klass_by_name
580 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
581 ciSymbol* klass_name,
582 bool require_local) {
583 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
584 constantPoolHandle(),
585 klass_name,
586 require_local);)
587 }
588
589 // ------------------------------------------------------------------
590 // ciEnv::get_klass_by_index_impl
591 //
592 // Implementation of get_klass_by_index.
593 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
594 int index,
595 bool& is_accessible,
596 ciInstanceKlass* accessor) {
597 Klass* klass = nullptr;
598 Symbol* klass_name = nullptr;
599
600 if (cpool->tag_at(index).is_symbol()) {
601 klass_name = cpool->symbol_at(index);
602 } else {
603 // Check if it's resolved if it's not a symbol constant pool entry.
604 klass = ConstantPool::klass_at_if_loaded(cpool, index);
605 // Try to look it up by name.
606 if (klass == nullptr) {
607 klass_name = cpool->klass_name_at(index);
608 }
609 }
610
611 if (klass == nullptr) {
612 // Not found in constant pool. Use the name to do the lookup.
613 ciKlass* k = get_klass_by_name_impl(accessor,
614 cpool,
615 get_symbol(klass_name),
616 false);
617 // Calculate accessibility the hard way.
618 if (!k->is_loaded()) {
619 is_accessible = false;
620 } else if (k->loader() != accessor->loader() &&
621 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
622 // Loaded only remotely. Not linked yet.
623 is_accessible = false;
624 } else {
625 // Linked locally, and we must also check public/private, etc.
626 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
627 }
628 return k;
629 }
630
631 // Check for prior unloaded klass. The SystemDictionary's answers
632 // can vary over time but the compiler needs consistency.
633 ciSymbol* name = get_symbol(klass->name());
634 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
635 if (unloaded_klass != nullptr) {
636 is_accessible = false;
637 return unloaded_klass;
638 }
639
640 // It is known to be accessible, since it was found in the constant pool.
641 ciKlass* ciKlass = get_klass(klass);
642 is_accessible = true;
643 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
644 // Klass was unresolved at replay dump time and therefore not accessible.
645 is_accessible = false;
646 }
647 return ciKlass;
648 }
649
650 // ------------------------------------------------------------------
651 // ciEnv::get_klass_by_index
652 //
653 // Get a klass from the constant pool.
654 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
655 int index,
656 bool& is_accessible,
657 ciInstanceKlass* accessor) {
658 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
659 }
660
661 // ------------------------------------------------------------------
662 // ciEnv::unbox_primitive_value
663 //
664 // Unbox a primitive and return it as a ciConstant.
665 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
666 jvalue value;
667 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
668 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
669 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
670 return ciConstant();
671 }
672 switch (bt) {
673 case T_BOOLEAN: return ciConstant(bt, value.z);
674 case T_BYTE: return ciConstant(bt, value.b);
675 case T_SHORT: return ciConstant(bt, value.s);
676 case T_CHAR: return ciConstant(bt, value.c);
677 case T_INT: return ciConstant(bt, value.i);
678 case T_LONG: return ciConstant(value.j);
679 case T_FLOAT: return ciConstant(value.f);
680 case T_DOUBLE: return ciConstant(value.d);
681
682 default:
683 assert(false, "not a primitive type: %s", type2name(bt));
684 return ciConstant();
685 }
686 }
687
688 // ------------------------------------------------------------------
689 // ciEnv::get_resolved_constant
690 //
691 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
692 assert(obj_index >= 0, "");
693 oop obj = cpool->resolved_reference_at(obj_index);
694 if (obj == nullptr) {
695 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
696 // Null constant is represented as a sentinel (non-null) value.
697 return ciConstant();
698 } else if (obj == Universe::the_null_sentinel()) {
699 return ciConstant(T_OBJECT, get_object(nullptr));
700 } else {
701 ciObject* ciobj = get_object(obj);
702 if (ciobj->is_array()) {
703 return ciConstant(T_ARRAY, ciobj);
704 } else {
705 int cp_index = cpool->object_to_cp_index(obj_index);
706 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
707 if (is_java_primitive(bt)) {
708 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
709 return unbox_primitive_value(ciobj, bt);
710 } else {
711 assert(ciobj->is_instance(), "should be an instance");
712 return ciConstant(T_OBJECT, ciobj);
713 }
714 }
715 }
716 }
717
718 // ------------------------------------------------------------------
719 // ciEnv::get_constant_by_index_impl
720 //
721 // Implementation of get_constant_by_index().
722 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
723 int index, int obj_index,
724 ciInstanceKlass* accessor) {
725 if (obj_index >= 0) {
726 ciConstant con = get_resolved_constant(cpool, obj_index);
727 if (con.is_valid()) {
728 return con;
729 }
730 }
731 constantTag tag = cpool->tag_at(index);
732 if (tag.is_int()) {
733 return ciConstant(T_INT, (jint)cpool->int_at(index));
734 } else if (tag.is_long()) {
735 return ciConstant((jlong)cpool->long_at(index));
736 } else if (tag.is_float()) {
737 return ciConstant((jfloat)cpool->float_at(index));
738 } else if (tag.is_double()) {
739 return ciConstant((jdouble)cpool->double_at(index));
740 } else if (tag.is_string()) {
741 EXCEPTION_CONTEXT;
742 assert(obj_index >= 0, "should have an object index");
743 oop string = cpool->string_at(index, obj_index, THREAD);
744 if (HAS_PENDING_EXCEPTION) {
745 CLEAR_PENDING_EXCEPTION;
746 record_out_of_memory_failure();
747 return ciConstant();
748 }
749 ciInstance* constant = get_object(string)->as_instance();
750 return ciConstant(T_OBJECT, constant);
751 } else if (tag.is_unresolved_klass_in_error()) {
752 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
753 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
754 bool will_link;
755 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
756 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
757 return ciConstant(T_OBJECT, mirror);
758 } else if (tag.is_method_type() || tag.is_method_type_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 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
762 ciObject* ciobj = get_unloaded_method_type_constant(signature);
763 return ciConstant(T_OBJECT, ciobj);
764 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
765 // must execute Java code to link this CP entry into cache[i].f1
766 assert(obj_index >= 0, "should have an object index");
767 bool ignore_will_link;
768 int ref_kind = cpool->method_handle_ref_kind_at(index);
769 int callee_index = cpool->method_handle_klass_index_at(index);
770 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
771 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
772 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
773 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
774 return ciConstant(T_OBJECT, ciobj);
775 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
776 assert(obj_index >= 0, "should have an object index");
777 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
778 } else {
779 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
780 return ciConstant();
781 }
782 }
783
784 // ------------------------------------------------------------------
785 // ciEnv::get_constant_by_index
786 //
787 // Pull a constant out of the constant pool. How appropriate.
788 //
789 // Implementation note: this query is currently in no way cached.
790 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
791 int pool_index, int cache_index,
792 ciInstanceKlass* accessor) {
793 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
794 }
795
796 // ------------------------------------------------------------------
797 // ciEnv::get_field_by_index_impl
798 //
799 // Implementation of get_field_by_index.
800 //
801 // Implementation note: the results of field lookups are cached
802 // in the accessor klass.
803 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
804 int index, Bytecodes::Code bc) {
805 ciConstantPoolCache* cache = accessor->field_cache();
806 if (cache == nullptr) {
807 ciField* field = new (arena()) ciField(accessor, index, bc);
808 return field;
809 } else {
810 ciField* field = (ciField*)cache->get(index);
811 if (field == nullptr) {
812 field = new (arena()) ciField(accessor, index, bc);
813 cache->insert(index, field);
814 }
815 return field;
816 }
817 }
818
819 // ------------------------------------------------------------------
820 // ciEnv::get_field_by_index
821 //
822 // Get a field by index from a klass's constant pool.
823 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
824 int index, Bytecodes::Code bc) {
825 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
826 }
827
828 // ------------------------------------------------------------------
829 // ciEnv::lookup_method
830 //
831 // Perform an appropriate method lookup based on accessor, holder,
832 // name, signature, and bytecode.
833 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
834 ciKlass* holder,
835 Symbol* name,
836 Symbol* sig,
837 Bytecodes::Code bc,
838 constantTag tag) {
839 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
840 Klass* holder_klass = holder->get_Klass();
841
842 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
843 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
844
845 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
846 LinkInfo::AccessCheck::required,
847 LinkInfo::LoaderConstraintCheck::required,
848 tag);
849 switch (bc) {
850 case Bytecodes::_invokestatic:
851 return LinkResolver::resolve_static_call_or_null(link_info);
852 case Bytecodes::_invokespecial:
853 return LinkResolver::resolve_special_call_or_null(link_info);
854 case Bytecodes::_invokeinterface:
855 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
856 case Bytecodes::_invokevirtual:
857 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
858 default:
859 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
860 return nullptr; // silence compiler warnings
861 }
862 }
863
864
865 // ------------------------------------------------------------------
866 // ciEnv::get_method_by_index_impl
867 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
868 int index, Bytecodes::Code bc,
869 ciInstanceKlass* accessor) {
870 assert(cpool.not_null(), "need constant pool");
871 assert(accessor != nullptr, "need origin of access");
872 if (bc == Bytecodes::_invokedynamic) {
873 // FIXME: code generation could allow for null (unlinked) call site
874 // The call site could be made patchable as follows:
875 // Load the appendix argument from the constant pool.
876 // Test the appendix argument and jump to a known deopt routine if it is null.
877 // Jump through a patchable call site, which is initially a deopt routine.
878 // Patch the call site to the nmethod entry point of the static compiled lambda form.
879 // As with other two-component call sites, both values must be independently verified.
880 int indy_index = cpool->decode_invokedynamic_index(index);
881 assert (indy_index >= 0, "should be");
882 assert(indy_index < cpool->cache()->resolved_indy_entries_length(), "impossible");
883 Method* adapter = cpool->resolved_indy_entry_at(indy_index)->method();
884 // Resolved if the adapter is non null.
885 if (adapter != nullptr) {
886 return get_method(adapter);
887 }
888
889 // Fake a method that is equivalent to a declared method.
890 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
891 ciSymbol* name = ciSymbols::invokeBasic_name();
892 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
893 return get_unloaded_method(holder, name, signature, accessor);
894 } else {
895 const int holder_index = cpool->klass_ref_index_at(index, bc);
896 bool holder_is_accessible;
897 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
898
899 // Get the method's name and signature.
900 Symbol* name_sym = cpool->name_ref_at(index, bc);
901 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
902
903 if (cpool->has_preresolution()
904 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
905 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
906 // Short-circuit lookups for JSR 292-related call sites.
907 // That is, do not rely only on name-based lookups, because they may fail
908 // if the names are not resolvable in the boot class loader (7056328).
909 switch (bc) {
910 case Bytecodes::_invokevirtual:
911 case Bytecodes::_invokeinterface:
912 case Bytecodes::_invokespecial:
913 case Bytecodes::_invokestatic:
914 {
915 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
916 if (m != nullptr) {
917 return get_method(m);
918 }
919 }
920 break;
921 default:
922 break;
923 }
924 }
925
926 if (holder_is_accessible) { // Our declared holder is loaded.
927 constantTag tag = cpool->tag_ref_at(index, bc);
928 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
929 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
930 if (m != nullptr &&
931 (bc == Bytecodes::_invokestatic
932 ? m->method_holder()->is_not_initialized()
933 : !m->method_holder()->is_loaded())) {
934 m = nullptr;
935 }
936 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
937 m = nullptr;
938 }
939 if (m != nullptr) {
940 // We found the method.
941 return get_method(m);
942 }
943 }
944
945 // Either the declared holder was not loaded, or the method could
946 // not be found. Create a dummy ciMethod to represent the failed
947 // lookup.
948 ciSymbol* name = get_symbol(name_sym);
949 ciSymbol* signature = get_symbol(sig_sym);
950 return get_unloaded_method(holder, name, signature, accessor);
951 }
952 }
953
954
955 // ------------------------------------------------------------------
956 // ciEnv::get_instance_klass_for_declared_method_holder
957 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
958 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
959 // instead of a ciInstanceKlass. For that case simply pretend that the
960 // declared holder is Object.clone since that's where the call will bottom out.
961 // A more correct fix would trickle out through many interfaces in CI,
962 // requiring ciInstanceKlass* to become ciKlass* and many more places would
963 // require checks to make sure the expected type was found. Given that this
964 // only occurs for clone() the more extensive fix seems like overkill so
965 // instead we simply smear the array type into Object.
966 guarantee(method_holder != nullptr, "no method holder");
967 if (method_holder->is_instance_klass()) {
968 return method_holder->as_instance_klass();
969 } else if (method_holder->is_array_klass()) {
970 return current()->Object_klass();
971 } else {
972 ShouldNotReachHere();
973 }
974 return nullptr;
975 }
976
977
978 // ------------------------------------------------------------------
979 // ciEnv::get_method_by_index
980 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
981 int index, Bytecodes::Code bc,
982 ciInstanceKlass* accessor) {
983 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
984 }
985
986
987 // ------------------------------------------------------------------
988 // ciEnv::name_buffer
989 char *ciEnv::name_buffer(int req_len) {
990 if (_name_buffer_len < req_len) {
991 if (_name_buffer == nullptr) {
992 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
993 _name_buffer_len = req_len;
994 } else {
995 _name_buffer =
996 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
997 _name_buffer_len = req_len;
998 }
999 }
1000 return _name_buffer;
1001 }
1002
1003 // ------------------------------------------------------------------
1004 // ciEnv::is_in_vm
1005 bool ciEnv::is_in_vm() {
1006 return JavaThread::current()->thread_state() == _thread_in_vm;
1007 }
1008
1009 // ------------------------------------------------------------------
1010 // ciEnv::validate_compile_task_dependencies
1011 //
1012 // Check for changes during compilation (e.g. class loads, evolution,
1013 // breakpoints, call site invalidation).
1014 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1015 if (failing()) return; // no need for further checks
1016
1017 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1018 if (result != Dependencies::end_marker) {
1019 if (result == Dependencies::call_site_target_value) {
1020 _inc_decompile_count_on_failure = false;
1021 record_failure("call site target change");
1022 } else if (Dependencies::is_klass_type(result)) {
1023 record_failure("concurrent class loading");
1024 } else {
1025 record_failure("invalid non-klass dependency");
1026 }
1027 }
1028 }
1029
1030 // ------------------------------------------------------------------
1031 // ciEnv::register_method
1032 void ciEnv::register_method(ciMethod* target,
1033 int entry_bci,
1034 CodeOffsets* offsets,
1035 int orig_pc_offset,
1036 CodeBuffer* code_buffer,
1037 int frame_words,
1038 OopMapSet* oop_map_set,
1039 ExceptionHandlerTable* handler_table,
1040 ImplicitExceptionTable* inc_table,
1041 AbstractCompiler* compiler,
1042 bool has_unsafe_access,
1043 bool has_wide_vectors,
1044 bool has_monitors,
1045 int immediate_oops_patched,
1046 RTMState rtm_state) {
1047 VM_ENTRY_MARK;
1048 nmethod* nm = nullptr;
1049 {
1050 methodHandle method(THREAD, target->get_Method());
1051
1052 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1053 if (method->get_method_counters(THREAD) == nullptr) {
1054 record_failure("can't create method counters");
1055 // All buffers in the CodeBuffer are allocated in the CodeCache.
1056 // If the code buffer is created on each compile attempt
1057 // as in C2, then it must be freed.
1058 code_buffer->free_blob();
1059 return;
1060 }
1061
1062 // Check if memory should be freed before allocation
1063 CodeCache::gc_on_allocation();
1064
1065 // To prevent compile queue updates.
1066 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1067
1068 // Prevent InstanceKlass::add_to_hierarchy from running
1069 // and invalidating our dependencies until we install this method.
1070 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1071 MutexLocker ml(Compile_lock);
1072 NoSafepointVerifier nsv;
1073
1074 // Change in Jvmti state may invalidate compilation.
1075 if (!failing() && jvmti_state_changed()) {
1076 record_failure("Jvmti state change invalidated dependencies");
1077 }
1078
1079 // Change in DTrace flags may invalidate compilation.
1080 if (!failing() &&
1081 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1082 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1083 record_failure("DTrace flags change invalidated dependencies");
1084 }
1085
1086 if (!failing() && target->needs_clinit_barrier() &&
1087 target->holder()->is_in_error_state()) {
1088 record_failure("method holder is in error state");
1089 }
1090
1091 if (!failing()) {
1092 if (log() != nullptr) {
1093 // Log the dependencies which this compilation declares.
1094 dependencies()->log_all_dependencies();
1095 }
1096
1097 // Encode the dependencies now, so we can check them right away.
1098 dependencies()->encode_content_bytes();
1099
1100 // Check for {class loads, evolution, breakpoints, ...} during compilation
1101 validate_compile_task_dependencies(target);
1102 }
1103 #if INCLUDE_RTM_OPT
1104 if (!failing() && (rtm_state != NoRTM) &&
1105 (method()->method_data() != nullptr) &&
1106 (method()->method_data()->rtm_state() != rtm_state)) {
1107 // Preemptive decompile if rtm state was changed.
1108 record_failure("RTM state change invalidated rtm code");
1109 }
1110 #endif
1111
1112 if (failing()) {
1113 // While not a true deoptimization, it is a preemptive decompile.
1114 MethodData* mdo = method()->method_data();
1115 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1116 mdo->inc_decompile_count();
1117 }
1118
1119 // All buffers in the CodeBuffer are allocated in the CodeCache.
1120 // If the code buffer is created on each compile attempt
1121 // as in C2, then it must be freed.
1122 code_buffer->free_blob();
1123 return;
1124 }
1125
1126 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1127 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1128
1129 nm = nmethod::new_nmethod(method,
1130 compile_id(),
1131 entry_bci,
1132 offsets,
1133 orig_pc_offset,
1134 debug_info(), dependencies(), code_buffer,
1135 frame_words, oop_map_set,
1136 handler_table, inc_table,
1137 compiler, CompLevel(task()->comp_level()));
1138
1139 // Free codeBlobs
1140 code_buffer->free_blob();
1141
1142 if (nm != nullptr) {
1143 nm->set_has_unsafe_access(has_unsafe_access);
1144 nm->set_has_wide_vectors(has_wide_vectors);
1145 nm->set_has_monitors(has_monitors);
1146 assert(!method->is_synchronized() || nm->has_monitors(), "");
1147 #if INCLUDE_RTM_OPT
1148 nm->set_rtm_state(rtm_state);
1149 #endif
1150
1151 if (entry_bci == InvocationEntryBci) {
1152 if (TieredCompilation) {
1153 // If there is an old version we're done with it
1154 CompiledMethod* old = method->code();
1155 if (TraceMethodReplacement && old != nullptr) {
1156 ResourceMark rm;
1157 char *method_name = method->name_and_sig_as_C_string();
1158 tty->print_cr("Replacing method %s", method_name);
1159 }
1160 if (old != nullptr) {
1161 old->make_not_used();
1162 }
1163 }
1164
1165 LogTarget(Info, nmethod, install) lt;
1166 if (lt.is_enabled()) {
1167 ResourceMark rm;
1168 char *method_name = method->name_and_sig_as_C_string();
1169 lt.print("Installing method (%d) %s ",
1170 task()->comp_level(), method_name);
1171 }
1172 // Allow the code to be executed
1173 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1174 if (nm->make_in_use()) {
1175 method->set_code(method, nm);
1176 }
1177 } else {
1178 LogTarget(Info, nmethod, install) lt;
1179 if (lt.is_enabled()) {
1180 ResourceMark rm;
1181 char *method_name = method->name_and_sig_as_C_string();
1182 lt.print("Installing osr method (%d) %s @ %d",
1183 task()->comp_level(), method_name, entry_bci);
1184 }
1185 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1186 if (nm->make_in_use()) {
1187 method->method_holder()->add_osr_nmethod(nm);
1188 }
1189 }
1190 }
1191 }
1192
1193 NoSafepointVerifier nsv;
1194 if (nm != nullptr) {
1195 // Compilation succeeded, post what we know about it
1196 nm->post_compiled_method(task());
1197 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1198 } else {
1199 // The CodeCache is full.
1200 record_failure("code cache is full");
1201 }
1202
1203 // safepoints are allowed again
1204 }
1205
1206 // ------------------------------------------------------------------
1207 // ciEnv::find_system_klass
1208 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1209 VM_ENTRY_MARK;
1210 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1211 }
1212
1213 // ------------------------------------------------------------------
1214 // ciEnv::comp_level
1215 int ciEnv::comp_level() {
1216 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1217 return task()->comp_level();
1218 }
1219
1220 // ------------------------------------------------------------------
1221 // ciEnv::compile_id
1222 int ciEnv::compile_id() {
1223 if (task() == nullptr) return 0;
1224 return task()->compile_id();
1225 }
1226
1227 // ------------------------------------------------------------------
1228 // ciEnv::notice_inlined_method()
1229 void ciEnv::notice_inlined_method(ciMethod* method) {
1230 _num_inlined_bytecodes += method->code_size_for_inlining();
1231 }
1232
1233 // ------------------------------------------------------------------
1234 // ciEnv::num_inlined_bytecodes()
1235 int ciEnv::num_inlined_bytecodes() const {
1236 return _num_inlined_bytecodes;
1237 }
1238
1239 // ------------------------------------------------------------------
1240 // ciEnv::record_failure()
1241 void ciEnv::record_failure(const char* reason) {
1242 if (_failure_reason == nullptr) {
1243 // Record the first failure reason.
1244 _failure_reason = reason;
1245 }
1246 }
1247
1248 void ciEnv::report_failure(const char* reason) {
1249 EventCompilationFailure event;
1250 if (event.should_commit()) {
1251 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1252 }
1253 }
1254
1255 // ------------------------------------------------------------------
1256 // ciEnv::record_method_not_compilable()
1257 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1258 int new_compilable =
1259 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1260
1261 // Only note transitions to a worse state
1262 if (new_compilable > _compilable) {
1263 if (log() != nullptr) {
1264 if (all_tiers) {
1265 log()->elem("method_not_compilable");
1266 } else {
1267 log()->elem("method_not_compilable_at_tier level='%d'",
1268 current()->task()->comp_level());
1269 }
1270 }
1271 _compilable = new_compilable;
1272
1273 // Reset failure reason; this one is more important.
1274 _failure_reason = nullptr;
1275 record_failure(reason);
1276 }
1277 }
1278
1279 // ------------------------------------------------------------------
1280 // ciEnv::record_out_of_memory_failure()
1281 void ciEnv::record_out_of_memory_failure() {
1282 // If memory is low, we stop compiling methods.
1283 record_method_not_compilable("out of memory");
1284 }
1285
1286 ciInstance* ciEnv::unloaded_ciinstance() {
1287 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1288 }
1289
1290 // ------------------------------------------------------------------
1291 // Replay support
1292
1293
1294 // Lookup location descriptor for the class, if any.
1295 // Returns false if not found.
1296 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1297 bool found = false;
1298 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1299 if (!found) {
1300 return false;
1301 }
1302 loc = _dyno_locs->at(pos);
1303 return found;
1304 }
1305
1306 // Associate the current location descriptor with the given class and record for later lookup.
1307 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1308 const char *loc = os::strdup(_dyno_name);
1309 bool found = false;
1310 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1311 if (found) {
1312 _dyno_locs->at_put(pos, loc);
1313 } else {
1314 _dyno_klasses->insert_before(pos, ik);
1315 _dyno_locs->insert_before(pos, loc);
1316 }
1317 }
1318
1319 // Associate the current location descriptor with the given class and record for later lookup.
1320 // If it turns out that there are multiple locations for the given class, that conflict should
1321 // be handled here. Currently we choose the first location found.
1322 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1323 if (!ik->is_hidden()) {
1324 return;
1325 }
1326 const char *loc0;
1327 if (!dyno_loc(ik, loc0)) {
1328 set_dyno_loc(ik);
1329 }
1330 }
1331
1332 // Look up the location descriptor for the given class and print it to the output stream.
1333 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1334 const char *loc;
1335 if (dyno_loc(ik, loc)) {
1336 out->print("%s", loc);
1337 return true;
1338 } else {
1339 return false;
1340 }
1341 }
1342
1343 // Look up the location descriptor for the given class and return it as a string.
1344 // Returns null if no location is found.
1345 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1346 if (ik->is_hidden()) {
1347 stringStream ss;
1348 if (print_dyno_loc(&ss, ik)) {
1349 ss.print(" ;"); // add terminator
1350 const char* call_site = ss.as_string();
1351 return call_site;
1352 }
1353 }
1354 return nullptr;
1355 }
1356
1357 // Look up the location descriptor for the given class and return it as a string.
1358 // Returns the class name as a fallback if no location is found.
1359 const char *ciEnv::replay_name(ciKlass* k) const {
1360 if (k->is_instance_klass()) {
1361 return replay_name(k->as_instance_klass()->get_instanceKlass());
1362 }
1363 return k->name()->as_quoted_ascii();
1364 }
1365
1366 // Look up the location descriptor for the given class and return it as a string.
1367 // Returns the class name as a fallback if no location is found.
1368 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1369 const char* name = dyno_name(ik);
1370 if (name != nullptr) {
1371 return name;
1372 }
1373 return ik->name()->as_quoted_ascii();
1374 }
1375
1376 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1377 void ciEnv::record_member(Thread* thread, oop member) {
1378 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1379 // Check MemberName.clazz field
1380 oop clazz = java_lang_invoke_MemberName::clazz(member);
1381 if (clazz->klass()->is_instance_klass()) {
1382 RecordLocation fp(this, "clazz");
1383 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1384 record_best_dyno_loc(ik);
1385 }
1386 // Check MemberName.method.vmtarget field
1387 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1388 if (vmtarget != nullptr) {
1389 RecordLocation fp2(this, "<vmtarget>");
1390 InstanceKlass* ik = vmtarget->method_holder();
1391 record_best_dyno_loc(ik);
1392 }
1393 }
1394
1395 // Read an object field. Lookup is done by name only.
1396 static inline oop obj_field(oop obj, const char* name) {
1397 return ciReplay::obj_field(obj, name);
1398 }
1399
1400 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1401 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1402 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1403
1404 {
1405 // Check LambdaForm.vmentry field
1406 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1407 RecordLocation fp0(this, "vmentry");
1408 record_member(thread, member);
1409 }
1410
1411 // Check LambdaForm.names array
1412 objArrayOop names = (objArrayOop)obj_field(form, "names");
1413 if (names != nullptr) {
1414 RecordLocation lp0(this, "names");
1415 int len = names->length();
1416 for (int i = 0; i < len; ++i) {
1417 oop name = names->obj_at(i);
1418 RecordLocation lp1(this, "%d", i);
1419 // Check LambdaForm.names[i].function field
1420 RecordLocation lp2(this, "function");
1421 oop function = obj_field(name, "function");
1422 if (function != nullptr) {
1423 // Check LambdaForm.names[i].function.member field
1424 oop member = obj_field(function, "member");
1425 if (member != nullptr) {
1426 RecordLocation lp3(this, "member");
1427 record_member(thread, member);
1428 }
1429 // Check LambdaForm.names[i].function.resolvedHandle field
1430 oop mh = obj_field(function, "resolvedHandle");
1431 if (mh != nullptr) {
1432 RecordLocation lp3(this, "resolvedHandle");
1433 record_mh(thread, mh);
1434 }
1435 // Check LambdaForm.names[i].function.invoker field
1436 oop invoker = obj_field(function, "invoker");
1437 if (invoker != nullptr) {
1438 RecordLocation lp3(this, "invoker");
1439 record_mh(thread, invoker);
1440 }
1441 }
1442 }
1443 }
1444 }
1445
1446 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1447 void ciEnv::record_mh(Thread* thread, oop mh) {
1448 {
1449 // Check MethodHandle.form field
1450 oop form = java_lang_invoke_MethodHandle::form(mh);
1451 RecordLocation fp(this, "form");
1452 record_lambdaform(thread, form);
1453 }
1454 // Check DirectMethodHandle.member field
1455 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1456 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1457 RecordLocation fp(this, "member");
1458 record_member(thread, member);
1459 } else {
1460 // Check <MethodHandle subclass>.argL<n> fields
1461 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1462 char arg_name[] = "argLXX";
1463 int max_arg = 99;
1464 for (int index = 0; index <= max_arg; ++index) {
1465 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1466 oop arg = obj_field(mh, arg_name);
1467 if (arg != nullptr) {
1468 RecordLocation fp(this, "%s", arg_name);
1469 if (arg->klass()->is_instance_klass()) {
1470 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1471 record_best_dyno_loc(ik2);
1472 record_call_site_obj(thread, arg);
1473 }
1474 } else {
1475 break;
1476 }
1477 }
1478 }
1479 }
1480
1481 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1482 // Types currently supported are MethodHandle and CallSite.
1483 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1484 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1485 {
1486 if (obj != nullptr) {
1487 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1488 record_mh(thread, obj);
1489 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1490 oop target = java_lang_invoke_CallSite::target(obj);
1491 if (target->klass()->is_instance_klass()) {
1492 RecordLocation fp(this, "target");
1493 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1494 record_best_dyno_loc(ik);
1495 }
1496 }
1497 }
1498 }
1499
1500 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1501 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1502 InstanceKlass* holder = adapter->method_holder();
1503 if (!holder->is_hidden()) {
1504 return;
1505 }
1506 RecordLocation fp(this, "<adapter>");
1507 record_best_dyno_loc(holder);
1508 }
1509
1510 // Process an invokedynamic call site and record any dynamic locations.
1511 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1512 int index = cp->decode_invokedynamic_index(indy_index);
1513 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(index);
1514 if (indy_info->method() != nullptr) {
1515 // process the adapter
1516 Method* adapter = indy_info->method();
1517 record_call_site_method(thread, adapter);
1518 // process the appendix
1519 oop appendix = cp->resolved_reference_from_indy(index);
1520 {
1521 RecordLocation fp(this, "<appendix>");
1522 record_call_site_obj(thread, appendix);
1523 }
1524 // process the BSM
1525 int pool_index = indy_info->constant_pool_index();
1526 BootstrapInfo bootstrap_specifier(cp, pool_index, index);
1527 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1528 {
1529 RecordLocation fp(this, "<bsm>");
1530 record_call_site_obj(thread, bsm);
1531 }
1532 }
1533 }
1534
1535 // Process an invokehandle call site and record any dynamic locations.
1536 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1537 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1538 if (!cp->tag_at(holder_index).is_klass()) {
1539 return; // not resolved
1540 }
1541 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1542 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1543 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1544 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index);
1545 if (method_entry->is_resolved(Bytecodes::_invokehandle)) {
1546 // process the adapter
1547 Method* adapter = method_entry->method();
1548 oop appendix = cp->cache()->appendix_if_resolved(method_entry);
1549 record_call_site_method(thread, adapter);
1550 // process the appendix
1551 {
1552 RecordLocation fp(this, "<appendix>");
1553 record_call_site_obj(thread, appendix);
1554 }
1555 }
1556 }
1557 }
1558
1559 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1560 // constant pool entries and record for future lookup.
1561 void ciEnv::find_dynamic_call_sites() {
1562 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1563 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1564
1565 // Iterate over the class hierarchy
1566 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1567 Klass* sub = iter.klass();
1568 if (sub->is_instance_klass()) {
1569 InstanceKlass *isub = InstanceKlass::cast(sub);
1570 InstanceKlass* ik = isub;
1571 if (!ik->is_linked()) {
1572 continue;
1573 }
1574 if (ik->is_hidden()) {
1575 continue;
1576 }
1577 JavaThread* thread = JavaThread::current();
1578 const constantPoolHandle pool(thread, ik->constants());
1579
1580 // Look for invokedynamic/invokehandle call sites
1581 for (int i = 0; i < ik->methods()->length(); ++i) {
1582 Method* m = ik->methods()->at(i);
1583
1584 BytecodeStream bcs(methodHandle(thread, m));
1585 while (!bcs.is_last_bytecode()) {
1586 Bytecodes::Code opcode = bcs.next();
1587 opcode = bcs.raw_code();
1588 switch (opcode) {
1589 case Bytecodes::_invokedynamic:
1590 case Bytecodes::_invokehandle: {
1591 RecordLocation fp(this, "@bci %s %s %s %d",
1592 ik->name()->as_quoted_ascii(),
1593 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1594 bcs.bci());
1595 if (opcode == Bytecodes::_invokedynamic) {
1596 int index = bcs.get_index_u4();
1597 process_invokedynamic(pool, index, thread);
1598 } else {
1599 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1600 int cp_cache_index = bcs.get_index_u2();
1601 process_invokehandle(pool, cp_cache_index, thread);
1602 }
1603 break;
1604 }
1605 default:
1606 break;
1607 }
1608 }
1609 }
1610
1611 // Look for MethodHandle constant pool entries
1612 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1613 int len = pool->length();
1614 for (int i = 0; i < len; ++i) {
1615 if (pool->tag_at(i).is_method_handle()) {
1616 bool found_it;
1617 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1618 if (mh != nullptr) {
1619 RecordLocation fp(this, "%d", i);
1620 record_mh(thread, mh);
1621 }
1622 }
1623 }
1624 }
1625 }
1626 }
1627
1628 void ciEnv::dump_compile_data(outputStream* out) {
1629 CompileTask* task = this->task();
1630 if (task) {
1631 #ifdef COMPILER2
1632 if (ReplayReduce && compiler_data() != nullptr) {
1633 // Dump C2 "reduced" inlining data.
1634 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1635 }
1636 #endif
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() != nullptr) {
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 dump_replay_data_version(out);
1668 #if INCLUDE_JVMTI
1669 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1670 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1671 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1672 #endif // INCLUDE_JVMTI
1673
1674 find_dynamic_call_sites();
1675
1676 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1677 out->print_cr("# %d ciObject found", objects->length());
1678
1679 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1680 // protection domain to load subsequent classes during replay compilation.
1681 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1682
1683 for (int i = 0; i < objects->length(); i++) {
1684 objects->at(i)->dump_replay_data(out);
1685 }
1686 dump_compile_data(out);
1687 out->flush();
1688 }
1689
1690 // Called from VM error reporter, so be careful.
1691 // Don't safepoint or acquire any locks.
1692 //
1693 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1694 GUARDED_VM_ENTRY(
1695 dump_replay_data_helper(out);
1696 )
1697 }
1698
1699 void ciEnv::dump_replay_data(outputStream* out) {
1700 GUARDED_VM_ENTRY(
1701 MutexLocker ml(Compile_lock);
1702 dump_replay_data_helper(out);
1703 )
1704 }
1705
1706 void ciEnv::dump_replay_data(int compile_id) {
1707 char buffer[64];
1708 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1709 if (ret > 0) {
1710 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1711 if (fd != -1) {
1712 FILE* replay_data_file = os::fdopen(fd, "w");
1713 if (replay_data_file != nullptr) {
1714 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1715 dump_replay_data(&replay_data_stream);
1716 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1717 } else {
1718 tty->print_cr("# Can't open file to dump replay data.");
1719 close(fd);
1720 }
1721 }
1722 }
1723 }
1724
1725 void ciEnv::dump_inline_data(int compile_id) {
1726 char buffer[64];
1727 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1728 if (ret > 0) {
1729 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1730 if (fd != -1) {
1731 FILE* inline_data_file = os::fdopen(fd, "w");
1732 if (inline_data_file != nullptr) {
1733 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1734 GUARDED_VM_ENTRY(
1735 MutexLocker ml(Compile_lock);
1736 dump_replay_data_version(&replay_data_stream);
1737 dump_compile_data(&replay_data_stream);
1738 )
1739 replay_data_stream.flush();
1740 tty->print("# Compiler inline data is saved as: ");
1741 tty->print_cr("%s", buffer);
1742 } else {
1743 tty->print_cr("# Can't open file to dump inline data.");
1744 close(fd);
1745 }
1746 }
1747 }
1748 }
1749
1750 void ciEnv::dump_replay_data_version(outputStream* out) {
1751 out->print_cr("version %d", REPLAY_VERSION);
1752 }