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