1 /*
2 * Copyright (c) 1999, 2024, 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 _inc_decompile_count_on_failure = true;
125 _compilable = MethodCompilable;
126 _break_at_compile = false;
127 _compiler_data = nullptr;
128 #ifndef PRODUCT
129 assert(!firstEnv, "not initialized properly");
130 #endif /* !PRODUCT */
131
132 _num_inlined_bytecodes = 0;
133 assert(task == nullptr || thread->task() == task, "sanity");
134 if (task != nullptr) {
135 task->mark_started(os::elapsed_counter());
136 }
137 _task = task;
138 _log = nullptr;
139
140 // Temporary buffer for creating symbols and such.
141 _name_buffer = nullptr;
142 _name_buffer_len = 0;
143
144 _arena = &_ciEnv_arena;
145 _factory = new (_arena) ciObjectFactory(_arena, 128);
146
147 // Preload commonly referenced system ciObjects.
148
149 // During VM initialization, these instances have not yet been created.
150 // Assertions ensure that these instances are not accessed before
151 // their initialization.
152
153 assert(Universe::is_fully_initialized(), "should be complete");
154
155 oop o = Universe::null_ptr_exception_instance();
156 assert(o != nullptr, "should have been initialized");
157 _NullPointerException_instance = get_object(o)->as_instance();
158 o = Universe::arithmetic_exception_instance();
159 assert(o != nullptr, "should have been initialized");
160 _ArithmeticException_instance = get_object(o)->as_instance();
161
162 _ArrayIndexOutOfBoundsException_instance = nullptr;
163 _ArrayStoreException_instance = nullptr;
164 _ClassCastException_instance = nullptr;
165 _the_null_string = nullptr;
166 _the_min_jint_string = nullptr;
167
168 _jvmti_redefinition_count = 0;
169 _jvmti_can_hotswap_or_post_breakpoint = false;
170 _jvmti_can_access_local_variables = false;
171 _jvmti_can_post_on_exceptions = false;
172 _jvmti_can_pop_frame = false;
173
174 _dyno_klasses = nullptr;
175 _dyno_locs = nullptr;
176 _dyno_name[0] = '\0';
177 }
178
179 // Record components of a location descriptor string. Components are appended by the constructor and
180 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
181 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
182 //
183 // Example use:
184 //
185 // {
186 // RecordLocation fp(this, "field1");
187 // // location: "field1"
188 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
189 // // location: "field1"
190 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
191 // // location: "field1"
192 // }
193 // // location: ""
194 //
195 // Examples of actual locations
196 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
197 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
198 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
199 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
200 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
201 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
202 class RecordLocation {
203 private:
204 char* end;
205
206 ATTRIBUTE_PRINTF(3, 4)
207 void push(ciEnv* ci, const char* fmt, ...) {
208 va_list args;
209 va_start(args, fmt);
210 push_va(ci, fmt, args);
211 va_end(args);
212 }
213
214 public:
215 ATTRIBUTE_PRINTF(3, 0)
216 void push_va(ciEnv* ci, const char* fmt, va_list args) {
217 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
218 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
219 os::vsnprintf(e, m - e, fmt, args);
220 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
221 }
222
223 // append a new component
224 ATTRIBUTE_PRINTF(3, 4)
225 RecordLocation(ciEnv* ci, const char* fmt, ...) {
226 end = ci->_dyno_name + strlen(ci->_dyno_name);
227 va_list args;
228 va_start(args, fmt);
229 push(ci, " ");
230 push_va(ci, fmt, args);
231 va_end(args);
232 }
233
234 // reset to previous state
235 ~RecordLocation() {
236 *end = '\0';
237 }
238 };
239
240 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
241 ASSERT_IN_VM;
242
243 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
244 CompilerThread* current_thread = CompilerThread::current();
245 assert(current_thread->env() == nullptr, "must be");
246 current_thread->set_env(this);
247 assert(ciEnv::current() == this, "sanity");
248
249 _oop_recorder = nullptr;
250 _debug_info = nullptr;
251 _dependencies = nullptr;
252 _inc_decompile_count_on_failure = true;
253 _compilable = MethodCompilable_never;
254 _break_at_compile = false;
255 _compiler_data = nullptr;
256 #ifndef PRODUCT
257 assert(firstEnv, "must be first");
258 firstEnv = false;
259 #endif /* !PRODUCT */
260
261 _num_inlined_bytecodes = 0;
262 _task = nullptr;
263 _log = nullptr;
264
265 // Temporary buffer for creating symbols and such.
266 _name_buffer = nullptr;
267 _name_buffer_len = 0;
268
269 _arena = arena;
270 _factory = new (_arena) ciObjectFactory(_arena, 128);
271
272 // Preload commonly referenced system ciObjects.
273
274 // During VM initialization, these instances have not yet been created.
275 // Assertions ensure that these instances are not accessed before
276 // their initialization.
277
278 assert(Universe::is_fully_initialized(), "must be");
279
280 _NullPointerException_instance = nullptr;
281 _ArithmeticException_instance = nullptr;
282 _ArrayIndexOutOfBoundsException_instance = nullptr;
283 _ArrayStoreException_instance = nullptr;
284 _ClassCastException_instance = nullptr;
285 _the_null_string = nullptr;
286 _the_min_jint_string = nullptr;
287
288 _jvmti_redefinition_count = 0;
289 _jvmti_can_hotswap_or_post_breakpoint = false;
290 _jvmti_can_access_local_variables = false;
291 _jvmti_can_post_on_exceptions = false;
292 _jvmti_can_pop_frame = false;
293
294 _dyno_klasses = nullptr;
295 _dyno_locs = nullptr;
296 }
297
298 ciEnv::~ciEnv() {
299 GUARDED_VM_ENTRY(
300 CompilerThread* current_thread = CompilerThread::current();
301 _factory->remove_symbols();
302 // Need safepoint to clear the env on the thread. RedefineClasses might
303 // be reading it.
304 current_thread->set_env(nullptr);
305 )
306 }
307
308 // ------------------------------------------------------------------
309 // Cache Jvmti state
310 bool ciEnv::cache_jvmti_state() {
311 VM_ENTRY_MARK;
312 // Get Jvmti capabilities under lock to get consistent values.
313 MutexLocker mu(JvmtiThreadState_lock);
314 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
315 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
316 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
317 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
318 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
319 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
320 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
321 return _task != nullptr && _task->method()->is_old();
322 }
323
324 bool ciEnv::jvmti_state_changed() const {
325 // Some classes were redefined
326 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
327 return true;
328 }
329
330 if (!_jvmti_can_access_local_variables &&
331 JvmtiExport::can_access_local_variables()) {
332 return true;
333 }
334 if (!_jvmti_can_hotswap_or_post_breakpoint &&
335 JvmtiExport::can_hotswap_or_post_breakpoint()) {
336 return true;
337 }
338 if (!_jvmti_can_post_on_exceptions &&
339 JvmtiExport::can_post_on_exceptions()) {
340 return true;
341 }
342 if (!_jvmti_can_pop_frame &&
343 JvmtiExport::can_pop_frame()) {
344 return true;
345 }
346 if (!_jvmti_can_get_owned_monitor_info &&
347 JvmtiExport::can_get_owned_monitor_info()) {
348 return true;
349 }
350 if (!_jvmti_can_walk_any_space &&
351 JvmtiExport::can_walk_any_space()) {
352 return true;
353 }
354
355 return false;
356 }
357
358 // ------------------------------------------------------------------
359 // Cache DTrace flags
360 void ciEnv::cache_dtrace_flags() {
361 // Need lock?
362 _dtrace_method_probes = DTraceMethodProbes;
363 _dtrace_alloc_probes = DTraceAllocProbes;
364 }
365
366 // ------------------------------------------------------------------
367 // helper for lazy exception creation
368 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
369 VM_ENTRY_MARK;
370 if (handle == nullptr) {
371 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
372 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
373 jobject objh = nullptr;
374 if (ik != nullptr) {
375 oop obj = ik->allocate_instance(THREAD);
376 if (!HAS_PENDING_EXCEPTION)
377 objh = JNIHandles::make_global(Handle(THREAD, obj));
378 }
379 if (HAS_PENDING_EXCEPTION) {
380 CLEAR_PENDING_EXCEPTION;
381 } else {
382 handle = objh;
383 }
384 }
385 oop obj = JNIHandles::resolve(handle);
386 return obj == nullptr? nullptr: get_object(obj)->as_instance();
387 }
388
389 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
390 switch (type) {
391 case T_BOOLEAN: return Boolean_klass();
392 case T_BYTE : return Byte_klass();
393 case T_CHAR : return Character_klass();
394 case T_SHORT : return Short_klass();
395 case T_INT : return Integer_klass();
396 case T_LONG : return Long_klass();
397 case T_FLOAT : return Float_klass();
398 case T_DOUBLE : return Double_klass();
399
400 default:
401 assert(false, "not a primitive: %s", type2name(type));
402 return nullptr;
403 }
404 }
405
406 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
407 if (_ArrayIndexOutOfBoundsException_instance == nullptr) {
408 _ArrayIndexOutOfBoundsException_instance
409 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
410 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
411 }
412 return _ArrayIndexOutOfBoundsException_instance;
413 }
414 ciInstance* ciEnv::ArrayStoreException_instance() {
415 if (_ArrayStoreException_instance == nullptr) {
416 _ArrayStoreException_instance
417 = get_or_create_exception(_ArrayStoreException_handle,
418 vmSymbols::java_lang_ArrayStoreException());
419 }
420 return _ArrayStoreException_instance;
421 }
422 ciInstance* ciEnv::ClassCastException_instance() {
423 if (_ClassCastException_instance == nullptr) {
424 _ClassCastException_instance
425 = get_or_create_exception(_ClassCastException_handle,
426 vmSymbols::java_lang_ClassCastException());
427 }
428 return _ClassCastException_instance;
429 }
430
431 ciInstance* ciEnv::the_null_string() {
432 if (_the_null_string == nullptr) {
433 VM_ENTRY_MARK;
434 _the_null_string = get_object(Universe::the_null_string())->as_instance();
435 }
436 return _the_null_string;
437 }
438
439 ciInstance* ciEnv::the_min_jint_string() {
440 if (_the_min_jint_string == nullptr) {
441 VM_ENTRY_MARK;
442 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
443 }
444 return _the_min_jint_string;
445 }
446
447 // ------------------------------------------------------------------
448 // ciEnv::get_method_from_handle
449 ciMethod* ciEnv::get_method_from_handle(Method* method) {
450 VM_ENTRY_MARK;
451 return get_metadata(method)->as_method();
452 }
453
454 // ------------------------------------------------------------------
455 // ciEnv::check_klass_accessiblity
456 //
457 // Note: the logic of this method should mirror the logic of
458 // ConstantPool::verify_constant_pool_resolve.
459 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
460 Klass* resolved_klass) {
461 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
462 return true;
463 }
464 if (accessing_klass->is_obj_array_klass()) {
465 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
466 }
467 if (!accessing_klass->is_instance_klass()) {
468 return true;
469 }
470
471 if (resolved_klass->is_objArray_klass()) {
472 // Find the element klass, if this is an array.
473 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
474 }
475 if (resolved_klass->is_instance_klass()) {
476 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
477 InstanceKlass::cast(resolved_klass),
478 true) == Reflection::ACCESS_OK);
479 }
480 return true;
481 }
482
483 // ------------------------------------------------------------------
484 // ciEnv::get_klass_by_name_impl
485 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
486 const constantPoolHandle& cpool,
487 ciSymbol* name,
488 bool require_local) {
489 ASSERT_IN_VM;
490 Thread* current = Thread::current();
491
492 // Now we need to check the SystemDictionary
493 Symbol* sym = name->get_symbol();
494 if (Signature::has_envelope(sym)) {
495 // This is a name from a signature. Strip off the trimmings.
496 // Call recursive to keep scope of strippedsym.
497 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
498 ciSymbol* strippedname = get_symbol(strippedsym);
499 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
500 }
501
502 // Check for prior unloaded klass. The SystemDictionary's answers
503 // can vary over time but the compiler needs consistency.
504 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
505 if (unloaded_klass != nullptr) {
506 if (require_local) return nullptr;
507 return unloaded_klass;
508 }
509
510 Handle loader;
511 Handle domain;
512 if (accessing_klass != nullptr) {
513 loader = Handle(current, accessing_klass->loader());
514 domain = Handle(current, accessing_klass->protection_domain());
515 }
516
517 Klass* found_klass = require_local ?
518 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
519 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
520
521 // If we fail to find an array klass, look again for its element type.
522 // The element type may be available either locally or via constraints.
523 // In either case, if we can find the element type in the system dictionary,
524 // we must build an array type around it. The CI requires array klasses
525 // to be loaded if their element klasses are loaded, except when memory
526 // is exhausted.
527 if (Signature::is_array(sym) &&
528 (sym->char_at(1) == JVM_SIGNATURE_ARRAY || sym->char_at(1) == JVM_SIGNATURE_CLASS)) {
529 // We have an unloaded array.
530 // Build it on the fly if the element class exists.
531 SignatureStream ss(sym, false);
532 ss.skip_array_prefix(1);
533 // Get element ciKlass recursively.
534 ciKlass* elem_klass =
535 get_klass_by_name_impl(accessing_klass,
536 cpool,
537 get_symbol(ss.as_symbol()),
538 require_local);
539 if (elem_klass != nullptr && elem_klass->is_loaded()) {
540 // Now make an array for it
541 return ciObjArrayKlass::make_impl(elem_klass);
542 }
543 }
544
545 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
546 // Look inside the constant pool for pre-resolved class entries.
547 for (int i = cpool->length() - 1; i >= 1; i--) {
548 if (cpool->tag_at(i).is_klass()) {
549 Klass* kls = cpool->resolved_klass_at(i);
550 if (kls->name() == sym) {
551 found_klass = kls;
552 break;
553 }
554 }
555 }
556 }
557
558 if (found_klass != nullptr) {
559 // Found it. Build a CI handle.
560 return get_klass(found_klass);
561 }
562
563 if (require_local) return nullptr;
564
565 // Not yet loaded into the VM, or not governed by loader constraints.
566 // Make a CI representative for it.
567 return get_unloaded_klass(accessing_klass, name);
568 }
569
570 // ------------------------------------------------------------------
571 // ciEnv::get_klass_by_name
572 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
573 ciSymbol* klass_name,
574 bool require_local) {
575 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
576 constantPoolHandle(),
577 klass_name,
578 require_local);)
579 }
580
581 // ------------------------------------------------------------------
582 // ciEnv::get_klass_by_index_impl
583 //
584 // Implementation of get_klass_by_index.
585 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
586 int index,
587 bool& is_accessible,
588 ciInstanceKlass* accessor) {
589 Klass* klass = nullptr;
590 Symbol* klass_name = nullptr;
591
592 if (cpool->tag_at(index).is_symbol()) {
593 klass_name = cpool->symbol_at(index);
594 } else {
595 // Check if it's resolved if it's not a symbol constant pool entry.
596 klass = ConstantPool::klass_at_if_loaded(cpool, index);
597 // Try to look it up by name.
598 if (klass == nullptr) {
599 klass_name = cpool->klass_name_at(index);
600 }
601 }
602
603 if (klass == nullptr) {
604 // Not found in constant pool. Use the name to do the lookup.
605 ciKlass* k = get_klass_by_name_impl(accessor,
606 cpool,
607 get_symbol(klass_name),
608 false);
609 // Calculate accessibility the hard way.
610 if (!k->is_loaded()) {
611 is_accessible = false;
612 } else if (k->loader() != accessor->loader() &&
613 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
614 // Loaded only remotely. Not linked yet.
615 is_accessible = false;
616 } else {
617 // Linked locally, and we must also check public/private, etc.
618 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
619 }
620 return k;
621 }
622
623 // Check for prior unloaded klass. The SystemDictionary's answers
624 // can vary over time but the compiler needs consistency.
625 ciSymbol* name = get_symbol(klass->name());
626 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
627 if (unloaded_klass != nullptr) {
628 is_accessible = false;
629 return unloaded_klass;
630 }
631
632 // It is known to be accessible, since it was found in the constant pool.
633 ciKlass* ciKlass = get_klass(klass);
634 is_accessible = true;
635 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
636 // Klass was unresolved at replay dump time and therefore not accessible.
637 is_accessible = false;
638 }
639 return ciKlass;
640 }
641
642 // ------------------------------------------------------------------
643 // ciEnv::get_klass_by_index
644 //
645 // Get a klass from the constant pool.
646 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
647 int index,
648 bool& is_accessible,
649 ciInstanceKlass* accessor) {
650 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
651 }
652
653 // ------------------------------------------------------------------
654 // ciEnv::unbox_primitive_value
655 //
656 // Unbox a primitive and return it as a ciConstant.
657 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
658 jvalue value;
659 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
660 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
661 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
662 return ciConstant();
663 }
664 switch (bt) {
665 case T_BOOLEAN: return ciConstant(bt, value.z);
666 case T_BYTE: return ciConstant(bt, value.b);
667 case T_SHORT: return ciConstant(bt, value.s);
668 case T_CHAR: return ciConstant(bt, value.c);
669 case T_INT: return ciConstant(bt, value.i);
670 case T_LONG: return ciConstant(value.j);
671 case T_FLOAT: return ciConstant(value.f);
672 case T_DOUBLE: return ciConstant(value.d);
673
674 default:
675 assert(false, "not a primitive type: %s", type2name(bt));
676 return ciConstant();
677 }
678 }
679
680 // ------------------------------------------------------------------
681 // ciEnv::get_resolved_constant
682 //
683 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
684 assert(obj_index >= 0, "");
685 oop obj = cpool->resolved_reference_at(obj_index);
686 if (obj == nullptr) {
687 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
688 // Null constant is represented as a sentinel (non-null) value.
689 return ciConstant();
690 } else if (obj == Universe::the_null_sentinel()) {
691 return ciConstant(T_OBJECT, get_object(nullptr));
692 } else {
693 ciObject* ciobj = get_object(obj);
694 if (ciobj->is_array()) {
695 return ciConstant(T_ARRAY, ciobj);
696 } else {
697 int cp_index = cpool->object_to_cp_index(obj_index);
698 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
699 if (is_java_primitive(bt)) {
700 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
701 return unbox_primitive_value(ciobj, bt);
702 } else {
703 assert(ciobj->is_instance(), "should be an instance");
704 return ciConstant(T_OBJECT, ciobj);
705 }
706 }
707 }
708 }
709
710 // ------------------------------------------------------------------
711 // ciEnv::get_constant_by_index_impl
712 //
713 // Implementation of get_constant_by_index().
714 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
715 int index, int obj_index,
716 ciInstanceKlass* accessor) {
717 if (obj_index >= 0) {
718 ciConstant con = get_resolved_constant(cpool, obj_index);
719 if (con.is_valid()) {
720 return con;
721 }
722 }
723 constantTag tag = cpool->tag_at(index);
724 if (tag.is_int()) {
725 return ciConstant(T_INT, (jint)cpool->int_at(index));
726 } else if (tag.is_long()) {
727 return ciConstant((jlong)cpool->long_at(index));
728 } else if (tag.is_float()) {
729 return ciConstant((jfloat)cpool->float_at(index));
730 } else if (tag.is_double()) {
731 return ciConstant((jdouble)cpool->double_at(index));
732 } else if (tag.is_string()) {
733 EXCEPTION_CONTEXT;
734 assert(obj_index >= 0, "should have an object index");
735 oop string = cpool->string_at(index, obj_index, THREAD);
736 if (HAS_PENDING_EXCEPTION) {
737 CLEAR_PENDING_EXCEPTION;
738 record_out_of_memory_failure();
739 return ciConstant();
740 }
741 ciInstance* constant = get_object(string)->as_instance();
742 return ciConstant(T_OBJECT, constant);
743 } else if (tag.is_unresolved_klass_in_error()) {
744 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
745 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
746 bool will_link;
747 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
748 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
749 return ciConstant(T_OBJECT, mirror);
750 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
751 // must execute Java code to link this CP entry into cache[i].f1
752 assert(obj_index >= 0, "should have an object index");
753 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
754 ciObject* ciobj = get_unloaded_method_type_constant(signature);
755 return ciConstant(T_OBJECT, ciobj);
756 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
757 // must execute Java code to link this CP entry into cache[i].f1
758 assert(obj_index >= 0, "should have an object index");
759 bool ignore_will_link;
760 int ref_kind = cpool->method_handle_ref_kind_at(index);
761 int callee_index = cpool->method_handle_klass_index_at(index);
762 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
763 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
764 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
765 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
766 return ciConstant(T_OBJECT, ciobj);
767 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
768 assert(obj_index >= 0, "should have an object index");
769 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
770 } else {
771 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
772 return ciConstant();
773 }
774 }
775
776 // ------------------------------------------------------------------
777 // ciEnv::get_constant_by_index
778 //
779 // Pull a constant out of the constant pool. How appropriate.
780 //
781 // Implementation note: this query is currently in no way cached.
782 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
783 int pool_index, int cache_index,
784 ciInstanceKlass* accessor) {
785 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
786 }
787
788 // ------------------------------------------------------------------
789 // ciEnv::get_field_by_index_impl
790 //
791 // Implementation of get_field_by_index.
792 //
793 // Implementation note: the results of field lookups are cached
794 // in the accessor klass.
795 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
796 int index, Bytecodes::Code bc) {
797 ciConstantPoolCache* cache = accessor->field_cache();
798 if (cache == nullptr) {
799 ciField* field = new (arena()) ciField(accessor, index, bc);
800 return field;
801 } else {
802 ciField* field = (ciField*)cache->get(index);
803 if (field == nullptr) {
804 field = new (arena()) ciField(accessor, index, bc);
805 cache->insert(index, field);
806 }
807 return field;
808 }
809 }
810
811 // ------------------------------------------------------------------
812 // ciEnv::get_field_by_index
813 //
814 // Get a field by index from a klass's constant pool.
815 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
816 int index, Bytecodes::Code bc) {
817 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
818 }
819
820 // ------------------------------------------------------------------
821 // ciEnv::lookup_method
822 //
823 // Perform an appropriate method lookup based on accessor, holder,
824 // name, signature, and bytecode.
825 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
826 ciKlass* holder,
827 Symbol* name,
828 Symbol* sig,
829 Bytecodes::Code bc,
830 constantTag tag) {
831 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
832 Klass* holder_klass = holder->get_Klass();
833
834 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
835 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
836
837 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
838 LinkInfo::AccessCheck::required,
839 LinkInfo::LoaderConstraintCheck::required,
840 tag);
841 switch (bc) {
842 case Bytecodes::_invokestatic:
843 return LinkResolver::resolve_static_call_or_null(link_info);
844 case Bytecodes::_invokespecial:
845 return LinkResolver::resolve_special_call_or_null(link_info);
846 case Bytecodes::_invokeinterface:
847 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
848 case Bytecodes::_invokevirtual:
849 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
850 default:
851 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
852 return nullptr; // silence compiler warnings
853 }
854 }
855
856
857 // ------------------------------------------------------------------
858 // ciEnv::get_method_by_index_impl
859 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
860 int index, Bytecodes::Code bc,
861 ciInstanceKlass* accessor) {
862 assert(cpool.not_null(), "need constant pool");
863 assert(accessor != nullptr, "need origin of access");
864 if (bc == Bytecodes::_invokedynamic) {
865 // FIXME: code generation could allow for null (unlinked) call site
866 // The call site could be made patchable as follows:
867 // Load the appendix argument from the constant pool.
868 // Test the appendix argument and jump to a known deopt routine if it is null.
869 // Jump through a patchable call site, which is initially a deopt routine.
870 // Patch the call site to the nmethod entry point of the static compiled lambda form.
871 // As with other two-component call sites, both values must be independently verified.
872 assert(index < cpool->cache()->resolved_indy_entries_length(), "impossible");
873 Method* adapter = cpool->resolved_indy_entry_at(index)->method();
874 // Resolved if the adapter is non null.
875 if (adapter != nullptr) {
876 return get_method(adapter);
877 }
878
879 // Fake a method that is equivalent to a declared method.
880 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
881 ciSymbol* name = ciSymbols::invokeBasic_name();
882 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
883 return get_unloaded_method(holder, name, signature, accessor);
884 } else {
885 const int holder_index = cpool->klass_ref_index_at(index, bc);
886 bool holder_is_accessible;
887 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
888
889 // Get the method's name and signature.
890 Symbol* name_sym = cpool->name_ref_at(index, bc);
891 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
892
893 if (cpool->has_preresolution()
894 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
895 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
896 // Short-circuit lookups for JSR 292-related call sites.
897 // That is, do not rely only on name-based lookups, because they may fail
898 // if the names are not resolvable in the boot class loader (7056328).
899 switch (bc) {
900 case Bytecodes::_invokevirtual:
901 case Bytecodes::_invokeinterface:
902 case Bytecodes::_invokespecial:
903 case Bytecodes::_invokestatic:
904 {
905 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
906 if (m != nullptr) {
907 return get_method(m);
908 }
909 }
910 break;
911 default:
912 break;
913 }
914 }
915
916 if (holder_is_accessible) { // Our declared holder is loaded.
917 constantTag tag = cpool->tag_ref_at(index, bc);
918 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
919 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
920 if (m != nullptr &&
921 (bc == Bytecodes::_invokestatic
922 ? m->method_holder()->is_not_initialized()
923 : !m->method_holder()->is_loaded())) {
924 m = nullptr;
925 }
926 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
927 m = nullptr;
928 }
929 if (m != nullptr) {
930 // We found the method.
931 return get_method(m);
932 }
933 }
934
935 // Either the declared holder was not loaded, or the method could
936 // not be found. Create a dummy ciMethod to represent the failed
937 // lookup.
938 ciSymbol* name = get_symbol(name_sym);
939 ciSymbol* signature = get_symbol(sig_sym);
940 return get_unloaded_method(holder, name, signature, accessor);
941 }
942 }
943
944
945 // ------------------------------------------------------------------
946 // ciEnv::get_instance_klass_for_declared_method_holder
947 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
948 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
949 // instead of a ciInstanceKlass. For that case simply pretend that the
950 // declared holder is Object.clone since that's where the call will bottom out.
951 // A more correct fix would trickle out through many interfaces in CI,
952 // requiring ciInstanceKlass* to become ciKlass* and many more places would
953 // require checks to make sure the expected type was found. Given that this
954 // only occurs for clone() the more extensive fix seems like overkill so
955 // instead we simply smear the array type into Object.
956 guarantee(method_holder != nullptr, "no method holder");
957 if (method_holder->is_instance_klass()) {
958 return method_holder->as_instance_klass();
959 } else if (method_holder->is_array_klass()) {
960 return current()->Object_klass();
961 } else {
962 ShouldNotReachHere();
963 }
964 return nullptr;
965 }
966
967
968 // ------------------------------------------------------------------
969 // ciEnv::get_method_by_index
970 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
971 int index, Bytecodes::Code bc,
972 ciInstanceKlass* accessor) {
973 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
974 }
975
976
977 // ------------------------------------------------------------------
978 // ciEnv::name_buffer
979 char *ciEnv::name_buffer(int req_len) {
980 if (_name_buffer_len < req_len) {
981 if (_name_buffer == nullptr) {
982 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
983 _name_buffer_len = req_len;
984 } else {
985 _name_buffer =
986 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
987 _name_buffer_len = req_len;
988 }
989 }
990 return _name_buffer;
991 }
992
993 // ------------------------------------------------------------------
994 // ciEnv::is_in_vm
995 bool ciEnv::is_in_vm() {
996 return JavaThread::current()->thread_state() == _thread_in_vm;
997 }
998
999 // ------------------------------------------------------------------
1000 // ciEnv::validate_compile_task_dependencies
1001 //
1002 // Check for changes during compilation (e.g. class loads, evolution,
1003 // breakpoints, call site invalidation).
1004 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1005 if (failing()) return; // no need for further checks
1006
1007 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1008 if (result != Dependencies::end_marker) {
1009 if (result == Dependencies::call_site_target_value) {
1010 _inc_decompile_count_on_failure = false;
1011 record_failure("call site target change");
1012 } else if (Dependencies::is_klass_type(result)) {
1013 record_failure("concurrent class loading");
1014 } else {
1015 record_failure("invalid non-klass dependency");
1016 }
1017 }
1018 }
1019
1020 // ------------------------------------------------------------------
1021 // ciEnv::register_method
1022 void ciEnv::register_method(ciMethod* target,
1023 int entry_bci,
1024 CodeOffsets* offsets,
1025 int orig_pc_offset,
1026 CodeBuffer* code_buffer,
1027 int frame_words,
1028 OopMapSet* oop_map_set,
1029 ExceptionHandlerTable* handler_table,
1030 ImplicitExceptionTable* inc_table,
1031 AbstractCompiler* compiler,
1032 bool has_unsafe_access,
1033 bool has_wide_vectors,
1034 bool has_monitors,
1035 int immediate_oops_patched,
1036 RTMState rtm_state) {
1037 VM_ENTRY_MARK;
1038 nmethod* nm = nullptr;
1039 {
1040 methodHandle method(THREAD, target->get_Method());
1041
1042 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1043 if (method->get_method_counters(THREAD) == nullptr) {
1044 record_failure("can't create method counters");
1045 // All buffers in the CodeBuffer are allocated in the CodeCache.
1046 // If the code buffer is created on each compile attempt
1047 // as in C2, then it must be freed.
1048 code_buffer->free_blob();
1049 return;
1050 }
1051
1052 // Check if memory should be freed before allocation
1053 CodeCache::gc_on_allocation();
1054
1055 // To prevent compile queue updates.
1056 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1057
1058 // Prevent InstanceKlass::add_to_hierarchy from running
1059 // and invalidating our dependencies until we install this method.
1060 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1061 MutexLocker ml(Compile_lock);
1062 NoSafepointVerifier nsv;
1063
1064 // Change in Jvmti state may invalidate compilation.
1065 if (!failing() && jvmti_state_changed()) {
1066 record_failure("Jvmti state change invalidated dependencies");
1067 }
1068
1069 // Change in DTrace flags may invalidate compilation.
1070 if (!failing() &&
1071 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1072 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1073 record_failure("DTrace flags change invalidated dependencies");
1074 }
1075
1076 if (!failing() && target->needs_clinit_barrier() &&
1077 target->holder()->is_in_error_state()) {
1078 record_failure("method holder is in error state");
1079 }
1080
1081 if (!failing()) {
1082 if (log() != nullptr) {
1083 // Log the dependencies which this compilation declares.
1084 dependencies()->log_all_dependencies();
1085 }
1086
1087 // Encode the dependencies now, so we can check them right away.
1088 dependencies()->encode_content_bytes();
1089
1090 // Check for {class loads, evolution, breakpoints, ...} during compilation
1091 validate_compile_task_dependencies(target);
1092 }
1093 #if INCLUDE_RTM_OPT
1094 if (!failing() && (rtm_state != NoRTM) &&
1095 (method()->method_data() != nullptr) &&
1096 (method()->method_data()->rtm_state() != rtm_state)) {
1097 // Preemptive decompile if rtm state was changed.
1098 record_failure("RTM state change invalidated rtm code");
1099 }
1100 #endif
1101
1102 if (failing()) {
1103 // While not a true deoptimization, it is a preemptive decompile.
1104 MethodData* mdo = method()->method_data();
1105 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1106 mdo->inc_decompile_count();
1107 }
1108
1109 // All buffers in the CodeBuffer are allocated in the CodeCache.
1110 // If the code buffer is created on each compile attempt
1111 // as in C2, then it must be freed.
1112 code_buffer->free_blob();
1113 return;
1114 }
1115
1116 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1117 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1118
1119 nm = nmethod::new_nmethod(method,
1120 compile_id(),
1121 entry_bci,
1122 offsets,
1123 orig_pc_offset,
1124 debug_info(), dependencies(), code_buffer,
1125 frame_words, oop_map_set,
1126 handler_table, inc_table,
1127 compiler, CompLevel(task()->comp_level()));
1128
1129 // Free codeBlobs
1130 code_buffer->free_blob();
1131
1132 if (nm != nullptr) {
1133 nm->set_has_unsafe_access(has_unsafe_access);
1134 nm->set_has_wide_vectors(has_wide_vectors);
1135 nm->set_has_monitors(has_monitors);
1136 assert(!method->is_synchronized() || nm->has_monitors(), "");
1137 #if INCLUDE_RTM_OPT
1138 nm->set_rtm_state(rtm_state);
1139 #endif
1140
1141 if (entry_bci == InvocationEntryBci) {
1142 if (TieredCompilation) {
1143 // If there is an old version we're done with it
1144 nmethod* old = method->code();
1145 if (TraceMethodReplacement && old != nullptr) {
1146 ResourceMark rm;
1147 char *method_name = method->name_and_sig_as_C_string();
1148 tty->print_cr("Replacing method %s", method_name);
1149 }
1150 if (old != nullptr) {
1151 old->make_not_used();
1152 }
1153 }
1154
1155 LogTarget(Info, nmethod, install) lt;
1156 if (lt.is_enabled()) {
1157 ResourceMark rm;
1158 char *method_name = method->name_and_sig_as_C_string();
1159 lt.print("Installing method (%d) %s ",
1160 task()->comp_level(), method_name);
1161 }
1162 // Allow the code to be executed
1163 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1164 if (nm->make_in_use()) {
1165 method->set_code(method, nm);
1166 }
1167 } else {
1168 LogTarget(Info, nmethod, install) lt;
1169 if (lt.is_enabled()) {
1170 ResourceMark rm;
1171 char *method_name = method->name_and_sig_as_C_string();
1172 lt.print("Installing osr method (%d) %s @ %d",
1173 task()->comp_level(), method_name, entry_bci);
1174 }
1175 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1176 if (nm->make_in_use()) {
1177 method->method_holder()->add_osr_nmethod(nm);
1178 }
1179 }
1180 }
1181 }
1182
1183 NoSafepointVerifier nsv;
1184 if (nm != nullptr) {
1185 // Compilation succeeded, post what we know about it
1186 nm->post_compiled_method(task());
1187 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1188 } else {
1189 // The CodeCache is full.
1190 record_failure("code cache is full");
1191 }
1192
1193 // safepoints are allowed again
1194 }
1195
1196 // ------------------------------------------------------------------
1197 // ciEnv::find_system_klass
1198 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1199 VM_ENTRY_MARK;
1200 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1201 }
1202
1203 // ------------------------------------------------------------------
1204 // ciEnv::comp_level
1205 int ciEnv::comp_level() {
1206 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1207 return task()->comp_level();
1208 }
1209
1210 // ------------------------------------------------------------------
1211 // ciEnv::compile_id
1212 int ciEnv::compile_id() {
1213 if (task() == nullptr) return 0;
1214 return task()->compile_id();
1215 }
1216
1217 // ------------------------------------------------------------------
1218 // ciEnv::notice_inlined_method()
1219 void ciEnv::notice_inlined_method(ciMethod* method) {
1220 _num_inlined_bytecodes += method->code_size_for_inlining();
1221 }
1222
1223 // ------------------------------------------------------------------
1224 // ciEnv::num_inlined_bytecodes()
1225 int ciEnv::num_inlined_bytecodes() const {
1226 return _num_inlined_bytecodes;
1227 }
1228
1229 // ------------------------------------------------------------------
1230 // ciEnv::record_failure()
1231 void ciEnv::record_failure(const char* reason) {
1232 if (_failure_reason.get() == nullptr) {
1233 // Record the first failure reason.
1234 _failure_reason.set(reason);
1235 }
1236 }
1237
1238 void ciEnv::report_failure(const char* reason) {
1239 EventCompilationFailure event;
1240 if (event.should_commit()) {
1241 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1242 }
1243 }
1244
1245 // ------------------------------------------------------------------
1246 // ciEnv::record_method_not_compilable()
1247 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1248 int new_compilable =
1249 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1250
1251 // Only note transitions to a worse state
1252 if (new_compilable > _compilable) {
1253 if (log() != nullptr) {
1254 if (all_tiers) {
1255 log()->elem("method_not_compilable");
1256 } else {
1257 log()->elem("method_not_compilable_at_tier level='%d'",
1258 current()->task()->comp_level());
1259 }
1260 }
1261 _compilable = new_compilable;
1262
1263 // Reset failure reason; this one is more important.
1264 _failure_reason.clear();
1265 record_failure(reason);
1266 }
1267 }
1268
1269 // ------------------------------------------------------------------
1270 // ciEnv::record_out_of_memory_failure()
1271 void ciEnv::record_out_of_memory_failure() {
1272 // If memory is low, we stop compiling methods.
1273 record_method_not_compilable("out of memory");
1274 }
1275
1276 ciInstance* ciEnv::unloaded_ciinstance() {
1277 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1278 }
1279
1280 // ------------------------------------------------------------------
1281 // Replay support
1282
1283
1284 // Lookup location descriptor for the class, if any.
1285 // Returns false if not found.
1286 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1287 bool found = false;
1288 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1289 if (!found) {
1290 return false;
1291 }
1292 loc = _dyno_locs->at(pos);
1293 return found;
1294 }
1295
1296 // Associate the current location descriptor with the given class and record for later lookup.
1297 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1298 const char *loc = os::strdup(_dyno_name);
1299 bool found = false;
1300 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1301 if (found) {
1302 _dyno_locs->at_put(pos, loc);
1303 } else {
1304 _dyno_klasses->insert_before(pos, ik);
1305 _dyno_locs->insert_before(pos, loc);
1306 }
1307 }
1308
1309 // Associate the current location descriptor with the given class and record for later lookup.
1310 // If it turns out that there are multiple locations for the given class, that conflict should
1311 // be handled here. Currently we choose the first location found.
1312 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1313 if (!ik->is_hidden()) {
1314 return;
1315 }
1316 const char *loc0;
1317 if (!dyno_loc(ik, loc0)) {
1318 set_dyno_loc(ik);
1319 }
1320 }
1321
1322 // Look up the location descriptor for the given class and print it to the output stream.
1323 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1324 const char *loc;
1325 if (dyno_loc(ik, loc)) {
1326 out->print("%s", loc);
1327 return true;
1328 } else {
1329 return false;
1330 }
1331 }
1332
1333 // Look up the location descriptor for the given class and return it as a string.
1334 // Returns null if no location is found.
1335 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1336 if (ik->is_hidden()) {
1337 stringStream ss;
1338 if (print_dyno_loc(&ss, ik)) {
1339 ss.print(" ;"); // add terminator
1340 const char* call_site = ss.as_string();
1341 return call_site;
1342 }
1343 }
1344 return nullptr;
1345 }
1346
1347 // Look up the location descriptor for the given class and return it as a string.
1348 // Returns the class name as a fallback if no location is found.
1349 const char *ciEnv::replay_name(ciKlass* k) const {
1350 if (k->is_instance_klass()) {
1351 return replay_name(k->as_instance_klass()->get_instanceKlass());
1352 }
1353 return k->name()->as_quoted_ascii();
1354 }
1355
1356 // Look up the location descriptor for the given class and return it as a string.
1357 // Returns the class name as a fallback if no location is found.
1358 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1359 const char* name = dyno_name(ik);
1360 if (name != nullptr) {
1361 return name;
1362 }
1363 return ik->name()->as_quoted_ascii();
1364 }
1365
1366 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1367 void ciEnv::record_member(Thread* thread, oop member) {
1368 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1369 // Check MemberName.clazz field
1370 oop clazz = java_lang_invoke_MemberName::clazz(member);
1371 if (clazz->klass()->is_instance_klass()) {
1372 RecordLocation fp(this, "clazz");
1373 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1374 record_best_dyno_loc(ik);
1375 }
1376 // Check MemberName.method.vmtarget field
1377 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1378 if (vmtarget != nullptr) {
1379 RecordLocation fp2(this, "<vmtarget>");
1380 InstanceKlass* ik = vmtarget->method_holder();
1381 record_best_dyno_loc(ik);
1382 }
1383 }
1384
1385 // Read an object field. Lookup is done by name only.
1386 static inline oop obj_field(oop obj, const char* name) {
1387 return ciReplay::obj_field(obj, name);
1388 }
1389
1390 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1391 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1392 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1393
1394 {
1395 // Check LambdaForm.vmentry field
1396 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1397 RecordLocation fp0(this, "vmentry");
1398 record_member(thread, member);
1399 }
1400
1401 // Check LambdaForm.names array
1402 objArrayOop names = (objArrayOop)obj_field(form, "names");
1403 if (names != nullptr) {
1404 RecordLocation lp0(this, "names");
1405 int len = names->length();
1406 for (int i = 0; i < len; ++i) {
1407 oop name = names->obj_at(i);
1408 RecordLocation lp1(this, "%d", i);
1409 // Check LambdaForm.names[i].function field
1410 RecordLocation lp2(this, "function");
1411 oop function = obj_field(name, "function");
1412 if (function != nullptr) {
1413 // Check LambdaForm.names[i].function.member field
1414 oop member = obj_field(function, "member");
1415 if (member != nullptr) {
1416 RecordLocation lp3(this, "member");
1417 record_member(thread, member);
1418 }
1419 // Check LambdaForm.names[i].function.resolvedHandle field
1420 oop mh = obj_field(function, "resolvedHandle");
1421 if (mh != nullptr) {
1422 RecordLocation lp3(this, "resolvedHandle");
1423 record_mh(thread, mh);
1424 }
1425 // Check LambdaForm.names[i].function.invoker field
1426 oop invoker = obj_field(function, "invoker");
1427 if (invoker != nullptr) {
1428 RecordLocation lp3(this, "invoker");
1429 record_mh(thread, invoker);
1430 }
1431 }
1432 }
1433 }
1434 }
1435
1436 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1437 void ciEnv::record_mh(Thread* thread, oop mh) {
1438 {
1439 // Check MethodHandle.form field
1440 oop form = java_lang_invoke_MethodHandle::form(mh);
1441 RecordLocation fp(this, "form");
1442 record_lambdaform(thread, form);
1443 }
1444 // Check DirectMethodHandle.member field
1445 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1446 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1447 RecordLocation fp(this, "member");
1448 record_member(thread, member);
1449 } else {
1450 // Check <MethodHandle subclass>.argL<n> fields
1451 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1452 char arg_name[] = "argLXX";
1453 int max_arg = 99;
1454 for (int index = 0; index <= max_arg; ++index) {
1455 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1456 oop arg = obj_field(mh, arg_name);
1457 if (arg != nullptr) {
1458 RecordLocation fp(this, "%s", arg_name);
1459 if (arg->klass()->is_instance_klass()) {
1460 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1461 record_best_dyno_loc(ik2);
1462 record_call_site_obj(thread, arg);
1463 }
1464 } else {
1465 break;
1466 }
1467 }
1468 }
1469 }
1470
1471 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1472 // Types currently supported are MethodHandle and CallSite.
1473 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1474 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1475 {
1476 if (obj != nullptr) {
1477 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1478 record_mh(thread, obj);
1479 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1480 oop target = java_lang_invoke_CallSite::target(obj);
1481 if (target->klass()->is_instance_klass()) {
1482 RecordLocation fp(this, "target");
1483 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1484 record_best_dyno_loc(ik);
1485 }
1486 }
1487 }
1488 }
1489
1490 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1491 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1492 InstanceKlass* holder = adapter->method_holder();
1493 if (!holder->is_hidden()) {
1494 return;
1495 }
1496 RecordLocation fp(this, "<adapter>");
1497 record_best_dyno_loc(holder);
1498 }
1499
1500 // Process an invokedynamic call site and record any dynamic locations.
1501 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1502 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(indy_index);
1503 if (indy_info->method() != nullptr) {
1504 // process the adapter
1505 Method* adapter = indy_info->method();
1506 record_call_site_method(thread, adapter);
1507 // process the appendix
1508 oop appendix = cp->resolved_reference_from_indy(indy_index);
1509 {
1510 RecordLocation fp(this, "<appendix>");
1511 record_call_site_obj(thread, appendix);
1512 }
1513 // process the BSM
1514 int pool_index = indy_info->constant_pool_index();
1515 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1516 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1517 {
1518 RecordLocation fp(this, "<bsm>");
1519 record_call_site_obj(thread, bsm);
1520 }
1521 }
1522 }
1523
1524 // Process an invokehandle call site and record any dynamic locations.
1525 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1526 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1527 if (!cp->tag_at(holder_index).is_klass()) {
1528 return; // not resolved
1529 }
1530 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1531 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1532 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1533 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index);
1534 if (method_entry->is_resolved(Bytecodes::_invokehandle)) {
1535 // process the adapter
1536 Method* adapter = method_entry->method();
1537 oop appendix = cp->cache()->appendix_if_resolved(method_entry);
1538 record_call_site_method(thread, adapter);
1539 // process the appendix
1540 {
1541 RecordLocation fp(this, "<appendix>");
1542 record_call_site_obj(thread, appendix);
1543 }
1544 }
1545 }
1546 }
1547
1548 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1549 // constant pool entries and record for future lookup.
1550 void ciEnv::find_dynamic_call_sites() {
1551 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1552 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1553
1554 // Iterate over the class hierarchy
1555 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1556 Klass* sub = iter.klass();
1557 if (sub->is_instance_klass()) {
1558 InstanceKlass *isub = InstanceKlass::cast(sub);
1559 InstanceKlass* ik = isub;
1560 if (!ik->is_linked()) {
1561 continue;
1562 }
1563 if (ik->is_hidden()) {
1564 continue;
1565 }
1566 JavaThread* thread = JavaThread::current();
1567 const constantPoolHandle pool(thread, ik->constants());
1568
1569 // Look for invokedynamic/invokehandle call sites
1570 for (int i = 0; i < ik->methods()->length(); ++i) {
1571 Method* m = ik->methods()->at(i);
1572
1573 BytecodeStream bcs(methodHandle(thread, m));
1574 while (!bcs.is_last_bytecode()) {
1575 Bytecodes::Code opcode = bcs.next();
1576 opcode = bcs.raw_code();
1577 switch (opcode) {
1578 case Bytecodes::_invokedynamic:
1579 case Bytecodes::_invokehandle: {
1580 RecordLocation fp(this, "@bci %s %s %s %d",
1581 ik->name()->as_quoted_ascii(),
1582 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1583 bcs.bci());
1584 if (opcode == Bytecodes::_invokedynamic) {
1585 int index = bcs.get_index_u4();
1586 process_invokedynamic(pool, index, thread);
1587 } else {
1588 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1589 int cp_cache_index = bcs.get_index_u2();
1590 process_invokehandle(pool, cp_cache_index, thread);
1591 }
1592 break;
1593 }
1594 default:
1595 break;
1596 }
1597 }
1598 }
1599
1600 // Look for MethodHandle constant pool entries
1601 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1602 int len = pool->length();
1603 for (int i = 0; i < len; ++i) {
1604 if (pool->tag_at(i).is_method_handle()) {
1605 bool found_it;
1606 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1607 if (mh != nullptr) {
1608 RecordLocation fp(this, "%d", i);
1609 record_mh(thread, mh);
1610 }
1611 }
1612 }
1613 }
1614 }
1615 }
1616
1617 void ciEnv::dump_compile_data(outputStream* out) {
1618 CompileTask* task = this->task();
1619 if (task) {
1620 #ifdef COMPILER2
1621 if (ReplayReduce && compiler_data() != nullptr) {
1622 // Dump C2 "reduced" inlining data.
1623 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1624 }
1625 #endif
1626 Method* method = task->method();
1627 int entry_bci = task->osr_bci();
1628 int comp_level = task->comp_level();
1629 out->print("compile ");
1630 get_method(method)->dump_name_as_ascii(out);
1631 out->print(" %d %d", entry_bci, comp_level);
1632 if (compiler_data() != nullptr) {
1633 if (is_c2_compile(comp_level)) {
1634 #ifdef COMPILER2
1635 // Dump C2 inlining data.
1636 ((Compile*)compiler_data())->dump_inline_data(out);
1637 #endif
1638 } else if (is_c1_compile(comp_level)) {
1639 #ifdef COMPILER1
1640 // Dump C1 inlining data.
1641 ((Compilation*)compiler_data())->dump_inline_data(out);
1642 #endif
1643 }
1644 }
1645 out->cr();
1646 }
1647 }
1648
1649 // Called from VM error reporter, so be careful.
1650 // Don't safepoint or acquire any locks.
1651 //
1652 void ciEnv::dump_replay_data_helper(outputStream* out) {
1653 NoSafepointVerifier no_safepoint;
1654 ResourceMark rm;
1655
1656 dump_replay_data_version(out);
1657 #if INCLUDE_JVMTI
1658 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1659 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1660 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1661 #endif // INCLUDE_JVMTI
1662
1663 find_dynamic_call_sites();
1664
1665 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1666 out->print_cr("# %d ciObject found", objects->length());
1667
1668 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1669 // protection domain to load subsequent classes during replay compilation.
1670 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1671
1672 for (int i = 0; i < objects->length(); i++) {
1673 objects->at(i)->dump_replay_data(out);
1674 }
1675 dump_compile_data(out);
1676 out->flush();
1677 }
1678
1679 // Called from VM error reporter, so be careful.
1680 // Don't safepoint or acquire any locks.
1681 //
1682 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1683 GUARDED_VM_ENTRY(
1684 dump_replay_data_helper(out);
1685 )
1686 }
1687
1688 void ciEnv::dump_replay_data(outputStream* out) {
1689 GUARDED_VM_ENTRY(
1690 MutexLocker ml(Compile_lock);
1691 dump_replay_data_helper(out);
1692 )
1693 }
1694
1695 void ciEnv::dump_replay_data(int compile_id) {
1696 char buffer[64];
1697 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1698 if (ret > 0) {
1699 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1700 if (fd != -1) {
1701 FILE* replay_data_file = os::fdopen(fd, "w");
1702 if (replay_data_file != nullptr) {
1703 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1704 dump_replay_data(&replay_data_stream);
1705 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1706 } else {
1707 tty->print_cr("# Can't open file to dump replay data.");
1708 close(fd);
1709 }
1710 }
1711 }
1712 }
1713
1714 void ciEnv::dump_inline_data(int compile_id) {
1715 char buffer[64];
1716 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1717 if (ret > 0) {
1718 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1719 if (fd != -1) {
1720 FILE* inline_data_file = os::fdopen(fd, "w");
1721 if (inline_data_file != nullptr) {
1722 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1723 GUARDED_VM_ENTRY(
1724 MutexLocker ml(Compile_lock);
1725 dump_replay_data_version(&replay_data_stream);
1726 dump_compile_data(&replay_data_stream);
1727 )
1728 replay_data_stream.flush();
1729 tty->print("# Compiler inline data is saved as: ");
1730 tty->print_cr("%s", buffer);
1731 } else {
1732 tty->print_cr("# Can't open file to dump inline data.");
1733 close(fd);
1734 }
1735 }
1736 }
1737 }
1738
1739 void ciEnv::dump_replay_data_version(outputStream* out) {
1740 out->print_cr("version %d", REPLAY_VERSION);
1741 }