1 /*
2 * Copyright (c) 1999, 2025, 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 "ci/ciConstant.hpp"
26 #include "ci/ciEnv.hpp"
27 #include "ci/ciField.hpp"
28 #include "ci/ciInlineKlass.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/compileLog.hpp"
47 #include "compiler/compilerEvent.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 #ifndef PRODUCT
104 static bool firstEnv = true;
105 #endif /* PRODUCT */
106
107 // ------------------------------------------------------------------
108 // ciEnv::ciEnv
109 ciEnv::ciEnv(CompileTask* task)
110 : _ciEnv_arena(mtCompiler, Arena::Tag::tag_cienv) {
111 VM_ENTRY_MARK;
112
113 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
114 thread->set_env(this);
115 assert(ciEnv::current() == this, "sanity");
116
117 _oop_recorder = nullptr;
118 _debug_info = nullptr;
119 _dependencies = nullptr;
120 _inc_decompile_count_on_failure = true;
121 _compilable = MethodCompilable;
122 _break_at_compile = false;
123 _compiler_data = nullptr;
124 #ifndef PRODUCT
125 assert(!firstEnv, "not initialized properly");
126 #endif /* !PRODUCT */
127
128 _num_inlined_bytecodes = 0;
129 assert(task == nullptr || thread->task() == task, "sanity");
130 if (task != nullptr) {
131 task->mark_started(os::elapsed_counter());
132 }
133 _task = task;
134 _log = nullptr;
135
136 // Temporary buffer for creating symbols and such.
137 _name_buffer = nullptr;
138 _name_buffer_len = 0;
139
140 _arena = &_ciEnv_arena;
141 _factory = new (_arena) ciObjectFactory(_arena, 128);
142
143 // Preload commonly referenced system ciObjects.
144
145 // During VM initialization, these instances have not yet been created.
146 // Assertions ensure that these instances are not accessed before
147 // their initialization.
148
149 assert(Universe::is_fully_initialized(), "should be complete");
150
151 oop o = Universe::null_ptr_exception_instance();
152 assert(o != nullptr, "should have been initialized");
153 _NullPointerException_instance = get_object(o)->as_instance();
154 o = Universe::arithmetic_exception_instance();
155 assert(o != nullptr, "should have been initialized");
156 _ArithmeticException_instance = get_object(o)->as_instance();
157 o = Universe::array_index_out_of_bounds_exception_instance();
158 assert(o != nullptr, "should have been initialized");
159 _ArrayIndexOutOfBoundsException_instance = get_object(o)->as_instance();
160 o = Universe::array_store_exception_instance();
161 assert(o != nullptr, "should have been initialized");
162 _ArrayStoreException_instance = get_object(o)->as_instance();
163 o = Universe::class_cast_exception_instance();
164 assert(o != nullptr, "should have been initialized");
165 _ClassCastException_instance = get_object(o)->as_instance();
166
167 _the_null_string = nullptr;
168 _the_min_jint_string = nullptr;
169
170 _jvmti_redefinition_count = 0;
171 _jvmti_can_hotswap_or_post_breakpoint = false;
172 _jvmti_can_access_local_variables = false;
173 _jvmti_can_post_on_exceptions = false;
174 _jvmti_can_pop_frame = false;
175
176 _dyno_klasses = nullptr;
177 _dyno_locs = nullptr;
178 _dyno_name[0] = '\0';
179 }
180
181 // Record components of a location descriptor string. Components are appended by the constructor and
182 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
183 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
184 //
185 // Example use:
186 //
187 // {
188 // RecordLocation fp(this, "field1");
189 // // location: "field1"
190 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
191 // // location: "field1"
192 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
193 // // location: "field1"
194 // }
195 // // location: ""
196 //
197 // Examples of actual locations
198 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
199 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
200 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
201 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
202 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
203 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
204 class RecordLocation {
205 private:
206 char* end;
207
208 ATTRIBUTE_PRINTF(3, 4)
209 void push(ciEnv* ci, const char* fmt, ...) {
210 va_list args;
211 va_start(args, fmt);
212 push_va(ci, fmt, args);
213 va_end(args);
214 }
215
216 public:
217 ATTRIBUTE_PRINTF(3, 0)
218 void push_va(ciEnv* ci, const char* fmt, va_list args) {
219 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
220 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
221 os::vsnprintf(e, m - e, fmt, args);
222 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
223 }
224
225 // append a new component
226 ATTRIBUTE_PRINTF(3, 4)
227 RecordLocation(ciEnv* ci, const char* fmt, ...) {
228 end = ci->_dyno_name + strlen(ci->_dyno_name);
229 va_list args;
230 va_start(args, fmt);
231 push(ci, " ");
232 push_va(ci, fmt, args);
233 va_end(args);
234 }
235
236 // reset to previous state
237 ~RecordLocation() {
238 *end = '\0';
239 }
240 };
241
242 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler, Arena::Tag::tag_cienv) {
243 ASSERT_IN_VM;
244
245 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
246 CompilerThread* current_thread = CompilerThread::current();
247 assert(current_thread->env() == nullptr, "must be");
248 current_thread->set_env(this);
249 assert(ciEnv::current() == this, "sanity");
250
251 _oop_recorder = nullptr;
252 _debug_info = nullptr;
253 _dependencies = nullptr;
254 _inc_decompile_count_on_failure = true;
255 _compilable = MethodCompilable_never;
256 _break_at_compile = false;
257 _compiler_data = nullptr;
258 #ifndef PRODUCT
259 assert(firstEnv, "must be first");
260 firstEnv = false;
261 #endif /* !PRODUCT */
262
263 _num_inlined_bytecodes = 0;
264 _task = nullptr;
265 _log = nullptr;
266
267 // Temporary buffer for creating symbols and such.
268 _name_buffer = nullptr;
269 _name_buffer_len = 0;
270
271 _arena = arena;
272 _factory = new (_arena) ciObjectFactory(_arena, 128);
273
274 // Preload commonly referenced system ciObjects.
275
276 // During VM initialization, these instances have not yet been created.
277 // Assertions ensure that these instances are not accessed before
278 // their initialization.
279
280 assert(Universe::is_fully_initialized(), "must be");
281
282 _NullPointerException_instance = nullptr;
283 _ArithmeticException_instance = nullptr;
284 _ArrayIndexOutOfBoundsException_instance = nullptr;
285 _ArrayStoreException_instance = nullptr;
286 _ClassCastException_instance = nullptr;
287 _the_null_string = nullptr;
288 _the_min_jint_string = nullptr;
289
290 _jvmti_redefinition_count = 0;
291 _jvmti_can_hotswap_or_post_breakpoint = false;
292 _jvmti_can_access_local_variables = false;
293 _jvmti_can_post_on_exceptions = false;
294 _jvmti_can_pop_frame = false;
295
296 _dyno_klasses = nullptr;
297 _dyno_locs = nullptr;
298 }
299
300 ciEnv::~ciEnv() {
301 GUARDED_VM_ENTRY(
302 CompilerThread* current_thread = CompilerThread::current();
303 _factory->remove_symbols();
304 // Need safepoint to clear the env on the thread. RedefineClasses might
305 // be reading it.
306 current_thread->set_env(nullptr);
307 )
308 }
309
310 // ------------------------------------------------------------------
311 // Cache Jvmti state
312 bool ciEnv::cache_jvmti_state() {
313 VM_ENTRY_MARK;
314 // Get Jvmti capabilities under lock to get consistent values.
315 MutexLocker mu(JvmtiThreadState_lock);
316 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
317 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
318 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
319 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
320 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
321 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
322 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
323 return _task != nullptr && _task->method()->is_old();
324 }
325
326 bool ciEnv::jvmti_state_changed() const {
327 // Some classes were redefined
328 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
329 return true;
330 }
331
332 if (!_jvmti_can_access_local_variables &&
333 JvmtiExport::can_access_local_variables()) {
334 return true;
335 }
336 if (!_jvmti_can_hotswap_or_post_breakpoint &&
337 JvmtiExport::can_hotswap_or_post_breakpoint()) {
338 return true;
339 }
340 if (!_jvmti_can_post_on_exceptions &&
341 JvmtiExport::can_post_on_exceptions()) {
342 return true;
343 }
344 if (!_jvmti_can_pop_frame &&
345 JvmtiExport::can_pop_frame()) {
346 return true;
347 }
348 if (!_jvmti_can_get_owned_monitor_info &&
349 JvmtiExport::can_get_owned_monitor_info()) {
350 return true;
351 }
352 if (!_jvmti_can_walk_any_space &&
353 JvmtiExport::can_walk_any_space()) {
354 return true;
355 }
356
357 return false;
358 }
359
360 // ------------------------------------------------------------------
361 // Cache DTrace flags
362 void ciEnv::cache_dtrace_flags() {
363 // Need lock?
364 _dtrace_method_probes = DTraceMethodProbes;
365 _dtrace_alloc_probes = DTraceAllocProbes;
366 }
367
368 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
369 switch (type) {
370 case T_BOOLEAN: return Boolean_klass();
371 case T_BYTE : return Byte_klass();
372 case T_CHAR : return Character_klass();
373 case T_SHORT : return Short_klass();
374 case T_INT : return Integer_klass();
375 case T_LONG : return Long_klass();
376 case T_FLOAT : return Float_klass();
377 case T_DOUBLE : return Double_klass();
378
379 default:
380 assert(false, "not a primitive: %s", type2name(type));
381 return nullptr;
382 }
383 }
384
385 ciInstance* ciEnv::the_null_string() {
386 if (_the_null_string == nullptr) {
387 VM_ENTRY_MARK;
388 _the_null_string = get_object(Universe::the_null_string())->as_instance();
389 }
390 return _the_null_string;
391 }
392
393 ciInstance* ciEnv::the_min_jint_string() {
394 if (_the_min_jint_string == nullptr) {
395 VM_ENTRY_MARK;
396 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
397 }
398 return _the_min_jint_string;
399 }
400
401 // ------------------------------------------------------------------
402 // ciEnv::get_method_from_handle
403 ciMethod* ciEnv::get_method_from_handle(Method* method) {
404 VM_ENTRY_MARK;
405 return get_metadata(method)->as_method();
406 }
407
408 // ------------------------------------------------------------------
409 // ciEnv::check_klass_accessiblity
410 //
411 // Note: the logic of this method should mirror the logic of
412 // ConstantPool::verify_constant_pool_resolve.
413 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
414 Klass* resolved_klass) {
415 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
416 return true;
417 }
418 if (accessing_klass->is_obj_array_klass()) {
419 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
420 }
421 if (!accessing_klass->is_instance_klass()) {
422 return true;
423 }
424
425 if (resolved_klass->is_objArray_klass()) {
426 // Find the element klass, if this is an array.
427 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
428 }
429 if (resolved_klass->is_instance_klass()) {
430 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
431 InstanceKlass::cast(resolved_klass),
432 true) == Reflection::ACCESS_OK);
433 }
434 return true;
435 }
436
437 // ------------------------------------------------------------------
438 // ciEnv::get_klass_by_name_impl
439 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
440 const constantPoolHandle& cpool,
441 ciSymbol* name,
442 bool require_local) {
443 ASSERT_IN_VM;
444 Thread* current = Thread::current();
445
446 // Now we need to check the SystemDictionary
447 Symbol* sym = name->get_symbol();
448 if (Signature::has_envelope(sym)) {
449 // This is a name from a signature. Strip off the trimmings.
450 // Call recursive to keep scope of strippedsym.
451 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
452 ciSymbol* strippedname = get_symbol(strippedsym);
453 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
454 }
455
456 // Check for prior unloaded klass. The SystemDictionary's answers
457 // can vary over time but the compiler needs consistency.
458 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
459 if (unloaded_klass != nullptr) {
460 if (require_local) return nullptr;
461 return unloaded_klass;
462 }
463
464 Handle loader;
465 if (accessing_klass != nullptr) {
466 loader = Handle(current, accessing_klass->loader());
467 }
468
469 Klass* found_klass = require_local ?
470 SystemDictionary::find_instance_or_array_klass(current, sym, loader) :
471 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
472
473 // If we fail to find an array klass, look again for its element type.
474 // The element type may be available either locally or via constraints.
475 // In either case, if we can find the element type in the system dictionary,
476 // we must build an array type around it. The CI requires array klasses
477 // to be loaded if their element klasses are loaded, except when memory
478 // is exhausted.
479 if (Signature::is_array(sym) &&
480 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
481 sym->char_at(1) == JVM_SIGNATURE_CLASS )) {
482 // We have an unloaded array.
483 // Build it on the fly if the element class exists.
484 SignatureStream ss(sym, false);
485 ss.skip_array_prefix(1);
486 // Get element ciKlass recursively.
487 ciKlass* elem_klass =
488 get_klass_by_name_impl(accessing_klass,
489 cpool,
490 get_symbol(ss.as_symbol()),
491 require_local);
492 if (elem_klass != nullptr && elem_klass->is_loaded()) {
493 // Now make an array for it
494 return ciArrayKlass::make(elem_klass);
495 }
496 }
497
498 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
499 // Look inside the constant pool for pre-resolved class entries.
500 for (int i = cpool->length() - 1; i >= 1; i--) {
501 if (cpool->tag_at(i).is_klass()) {
502 Klass* kls = cpool->resolved_klass_at(i);
503 if (kls->name() == sym) {
504 found_klass = kls;
505 break;
506 }
507 }
508 }
509 }
510
511 if (found_klass != nullptr) {
512 // Found it. Build a CI handle.
513 return get_klass(found_klass);
514 }
515
516 if (require_local) return nullptr;
517
518 // Not yet loaded into the VM, or not governed by loader constraints.
519 // Make a CI representative for it.
520 int i = 0;
521 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
522 i++;
523 }
524 return get_unloaded_klass(accessing_klass, name);
525 }
526
527 // ------------------------------------------------------------------
528 // ciEnv::get_klass_by_name
529 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
530 ciSymbol* klass_name,
531 bool require_local) {
532 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
533 constantPoolHandle(),
534 klass_name,
535 require_local);)
536 }
537
538 // ------------------------------------------------------------------
539 // ciEnv::get_klass_by_index_impl
540 //
541 // Implementation of get_klass_by_index.
542 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
543 int index,
544 bool& is_accessible,
545 ciInstanceKlass* accessor) {
546 Klass* klass = nullptr;
547 Symbol* klass_name = nullptr;
548
549 if (cpool->tag_at(index).is_symbol()) {
550 klass_name = cpool->symbol_at(index);
551 } else {
552 // Check if it's resolved if it's not a symbol constant pool entry.
553 klass = ConstantPool::klass_at_if_loaded(cpool, index);
554 // Try to look it up by name.
555 if (klass == nullptr) {
556 klass_name = cpool->klass_name_at(index);
557 }
558 }
559
560 if (klass == nullptr) {
561 // Not found in constant pool. Use the name to do the lookup.
562 ciKlass* k = get_klass_by_name_impl(accessor,
563 cpool,
564 get_symbol(klass_name),
565 false);
566 // Calculate accessibility the hard way.
567 if (!k->is_loaded()) {
568 is_accessible = false;
569 } else if (k->loader() != accessor->loader() &&
570 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
571 // Loaded only remotely. Not linked yet.
572 is_accessible = false;
573 } else {
574 // Linked locally, and we must also check public/private, etc.
575 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
576 }
577 return k;
578 }
579
580 // Check for prior unloaded klass. The SystemDictionary's answers
581 // can vary over time but the compiler needs consistency.
582 ciSymbol* name = get_symbol(klass->name());
583 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
584 if (unloaded_klass != nullptr) {
585 is_accessible = false;
586 return unloaded_klass;
587 }
588
589 // It is known to be accessible, since it was found in the constant pool.
590 ciKlass* ciKlass = get_klass(klass);
591 is_accessible = true;
592 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
593 // Klass was unresolved at replay dump time and therefore not accessible.
594 is_accessible = false;
595 }
596 return ciKlass;
597 }
598
599 // ------------------------------------------------------------------
600 // ciEnv::get_klass_by_index
601 //
602 // Get a klass from the constant pool.
603 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
604 int index,
605 bool& is_accessible,
606 ciInstanceKlass* accessor) {
607 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
608 }
609
610 // ------------------------------------------------------------------
611 // ciEnv::unbox_primitive_value
612 //
613 // Unbox a primitive and return it as a ciConstant.
614 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
615 jvalue value;
616 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
617 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
618 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
619 return ciConstant();
620 }
621 switch (bt) {
622 case T_BOOLEAN: return ciConstant(bt, value.z);
623 case T_BYTE: return ciConstant(bt, value.b);
624 case T_SHORT: return ciConstant(bt, value.s);
625 case T_CHAR: return ciConstant(bt, value.c);
626 case T_INT: return ciConstant(bt, value.i);
627 case T_LONG: return ciConstant(value.j);
628 case T_FLOAT: return ciConstant(value.f);
629 case T_DOUBLE: return ciConstant(value.d);
630
631 default:
632 assert(false, "not a primitive type: %s", type2name(bt));
633 return ciConstant();
634 }
635 }
636
637 // ------------------------------------------------------------------
638 // ciEnv::get_resolved_constant
639 //
640 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
641 assert(obj_index >= 0, "");
642 oop obj = cpool->resolved_reference_at(obj_index);
643 if (obj == nullptr) {
644 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
645 // Null constant is represented as a sentinel (non-null) value.
646 return ciConstant();
647 } else if (obj == Universe::the_null_sentinel()) {
648 return ciConstant(T_OBJECT, get_object(nullptr));
649 } else {
650 ciObject* ciobj = get_object(obj);
651 if (ciobj->is_array()) {
652 return ciConstant(T_ARRAY, ciobj);
653 } else {
654 int cp_index = cpool->object_to_cp_index(obj_index);
655 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
656 if (is_java_primitive(bt)) {
657 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
658 return unbox_primitive_value(ciobj, bt);
659 } else {
660 assert(ciobj->is_instance(), "should be an instance");
661 return ciConstant(T_OBJECT, ciobj);
662 }
663 }
664 }
665 }
666
667 // ------------------------------------------------------------------
668 // ciEnv::get_constant_by_index_impl
669 //
670 // Implementation of get_constant_by_index().
671 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
672 int index, int obj_index,
673 ciInstanceKlass* accessor) {
674 if (obj_index >= 0) {
675 ciConstant con = get_resolved_constant(cpool, obj_index);
676 if (con.is_valid()) {
677 return con;
678 }
679 }
680 constantTag tag = cpool->tag_at(index);
681 if (tag.is_int()) {
682 return ciConstant(T_INT, (jint)cpool->int_at(index));
683 } else if (tag.is_long()) {
684 return ciConstant((jlong)cpool->long_at(index));
685 } else if (tag.is_float()) {
686 return ciConstant((jfloat)cpool->float_at(index));
687 } else if (tag.is_double()) {
688 return ciConstant((jdouble)cpool->double_at(index));
689 } else if (tag.is_string()) {
690 EXCEPTION_CONTEXT;
691 assert(obj_index >= 0, "should have an object index");
692 oop string = cpool->string_at(index, obj_index, THREAD);
693 if (HAS_PENDING_EXCEPTION) {
694 CLEAR_PENDING_EXCEPTION;
695 record_out_of_memory_failure();
696 return ciConstant();
697 }
698 ciInstance* constant = get_object(string)->as_instance();
699 return ciConstant(T_OBJECT, constant);
700 } else if (tag.is_unresolved_klass_in_error()) {
701 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
702 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
703 bool will_link;
704 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
705 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
706 return ciConstant(T_OBJECT, mirror);
707 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
708 // must execute Java code to link this CP entry into cache[i].f1
709 assert(obj_index >= 0, "should have an object index");
710 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
711 ciObject* ciobj = get_unloaded_method_type_constant(signature);
712 return ciConstant(T_OBJECT, ciobj);
713 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
714 // must execute Java code to link this CP entry into cache[i].f1
715 assert(obj_index >= 0, "should have an object index");
716 bool ignore_will_link;
717 int ref_kind = cpool->method_handle_ref_kind_at(index);
718 int callee_index = cpool->method_handle_klass_index_at(index);
719 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
720 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
721 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
722 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
723 return ciConstant(T_OBJECT, ciobj);
724 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
725 assert(obj_index >= 0, "should have an object index");
726 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
727 } else {
728 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
729 return ciConstant();
730 }
731 }
732
733 // ------------------------------------------------------------------
734 // ciEnv::get_constant_by_index
735 //
736 // Pull a constant out of the constant pool. How appropriate.
737 //
738 // Implementation note: this query is currently in no way cached.
739 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
740 int pool_index, int cache_index,
741 ciInstanceKlass* accessor) {
742 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
743 }
744
745 // ------------------------------------------------------------------
746 // ciEnv::get_field_by_index_impl
747 //
748 // Implementation of get_field_by_index.
749 //
750 // Implementation note: the results of field lookups are cached
751 // in the accessor klass.
752 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
753 int index, Bytecodes::Code bc) {
754 ciConstantPoolCache* cache = accessor->field_cache();
755 if (cache == nullptr) {
756 ciField* field = new (arena()) ciField(accessor, index, bc);
757 return field;
758 } else {
759 ciField* field = (ciField*)cache->get(index);
760 if (field == nullptr) {
761 field = new (arena()) ciField(accessor, index, bc);
762 cache->insert(index, field);
763 }
764 return field;
765 }
766 }
767
768 // ------------------------------------------------------------------
769 // ciEnv::get_field_by_index
770 //
771 // Get a field by index from a klass's constant pool.
772 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
773 int index, Bytecodes::Code bc) {
774 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
775 }
776
777 // ------------------------------------------------------------------
778 // ciEnv::lookup_method
779 //
780 // Perform an appropriate method lookup based on accessor, holder,
781 // name, signature, and bytecode.
782 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
783 ciKlass* holder,
784 Symbol* name,
785 Symbol* sig,
786 Bytecodes::Code bc,
787 constantTag tag) {
788 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
789 Klass* holder_klass = holder->get_Klass();
790
791 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
792 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
793
794 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
795 LinkInfo::AccessCheck::required,
796 LinkInfo::LoaderConstraintCheck::required,
797 tag);
798 switch (bc) {
799 case Bytecodes::_invokestatic:
800 return LinkResolver::resolve_static_call_or_null(link_info);
801 case Bytecodes::_invokespecial:
802 return LinkResolver::resolve_special_call_or_null(link_info);
803 case Bytecodes::_invokeinterface:
804 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
805 case Bytecodes::_invokevirtual:
806 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
807 default:
808 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
809 return nullptr; // silence compiler warnings
810 }
811 }
812
813
814 // ------------------------------------------------------------------
815 // ciEnv::get_method_by_index_impl
816 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
817 int index, Bytecodes::Code bc,
818 ciInstanceKlass* accessor) {
819 assert(cpool.not_null(), "need constant pool");
820 assert(accessor != nullptr, "need origin of access");
821 if (bc == Bytecodes::_invokedynamic) {
822 // FIXME: code generation could allow for null (unlinked) call site
823 // The call site could be made patchable as follows:
824 // Load the appendix argument from the constant pool.
825 // Test the appendix argument and jump to a known deopt routine if it is null.
826 // Jump through a patchable call site, which is initially a deopt routine.
827 // Patch the call site to the nmethod entry point of the static compiled lambda form.
828 // As with other two-component call sites, both values must be independently verified.
829 assert(index < cpool->cache()->resolved_indy_entries_length(), "impossible");
830 Method* adapter = cpool->resolved_indy_entry_at(index)->method();
831 // Resolved if the adapter is non null.
832 if (adapter != nullptr) {
833 return get_method(adapter);
834 }
835
836 // Fake a method that is equivalent to a declared method.
837 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
838 ciSymbol* name = ciSymbols::invokeBasic_name();
839 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
840 return get_unloaded_method(holder, name, signature, accessor);
841 } else {
842 const int holder_index = cpool->klass_ref_index_at(index, bc);
843 bool holder_is_accessible;
844 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
845
846 // Get the method's name and signature.
847 Symbol* name_sym = cpool->name_ref_at(index, bc);
848 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
849
850 if (cpool->has_preresolution()
851 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
852 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
853 // Short-circuit lookups for JSR 292-related call sites.
854 // That is, do not rely only on name-based lookups, because they may fail
855 // if the names are not resolvable in the boot class loader (7056328).
856 switch (bc) {
857 case Bytecodes::_invokevirtual:
858 case Bytecodes::_invokeinterface:
859 case Bytecodes::_invokespecial:
860 case Bytecodes::_invokestatic:
861 {
862 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
863 if (m != nullptr) {
864 return get_method(m);
865 }
866 }
867 break;
868 default:
869 break;
870 }
871 }
872
873 if (holder_is_accessible) { // Our declared holder is loaded.
874 constantTag tag = cpool->tag_ref_at(index, bc);
875 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
876 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
877 if (m != nullptr &&
878 (bc == Bytecodes::_invokestatic
879 ? m->method_holder()->is_not_initialized()
880 : !m->method_holder()->is_loaded())) {
881 m = nullptr;
882 }
883 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
884 m = nullptr;
885 }
886 if (m != nullptr) {
887 // We found the method.
888 return get_method(m);
889 }
890 }
891
892 // Either the declared holder was not loaded, or the method could
893 // not be found. Create a dummy ciMethod to represent the failed
894 // lookup.
895 ciSymbol* name = get_symbol(name_sym);
896 ciSymbol* signature = get_symbol(sig_sym);
897 return get_unloaded_method(holder, name, signature, accessor);
898 }
899 }
900
901
902 // ------------------------------------------------------------------
903 // ciEnv::get_instance_klass_for_declared_method_holder
904 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
905 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
906 // instead of a ciInstanceKlass. For that case simply pretend that the
907 // declared holder is Object.clone since that's where the call will bottom out.
908 // A more correct fix would trickle out through many interfaces in CI,
909 // requiring ciInstanceKlass* to become ciKlass* and many more places would
910 // require checks to make sure the expected type was found. Given that this
911 // only occurs for clone() the more extensive fix seems like overkill so
912 // instead we simply smear the array type into Object.
913 guarantee(method_holder != nullptr, "no method holder");
914 if (method_holder->is_instance_klass()) {
915 return method_holder->as_instance_klass();
916 } else if (method_holder->is_array_klass()) {
917 return current()->Object_klass();
918 } else {
919 ShouldNotReachHere();
920 }
921 return nullptr;
922 }
923
924
925 // ------------------------------------------------------------------
926 // ciEnv::get_method_by_index
927 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
928 int index, Bytecodes::Code bc,
929 ciInstanceKlass* accessor) {
930 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
931 }
932
933
934 // ------------------------------------------------------------------
935 // ciEnv::name_buffer
936 char *ciEnv::name_buffer(int req_len) {
937 if (_name_buffer_len < req_len) {
938 if (_name_buffer == nullptr) {
939 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
940 _name_buffer_len = req_len;
941 } else {
942 _name_buffer =
943 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
944 _name_buffer_len = req_len;
945 }
946 }
947 return _name_buffer;
948 }
949
950 // ------------------------------------------------------------------
951 // ciEnv::is_in_vm
952 bool ciEnv::is_in_vm() {
953 return JavaThread::current()->thread_state() == _thread_in_vm;
954 }
955
956 // ------------------------------------------------------------------
957 // ciEnv::validate_compile_task_dependencies
958 //
959 // Check for changes during compilation (e.g. class loads, evolution,
960 // breakpoints, call site invalidation).
961 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
962 if (failing()) return; // no need for further checks
963
964 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
965 if (result != Dependencies::end_marker) {
966 if (result == Dependencies::call_site_target_value) {
967 _inc_decompile_count_on_failure = false;
968 record_failure("call site target change");
969 } else if (Dependencies::is_klass_type(result)) {
970 record_failure("concurrent class loading");
971 } else {
972 record_failure("invalid non-klass dependency");
973 }
974 }
975 }
976
977 // ------------------------------------------------------------------
978 // ciEnv::register_method
979 void ciEnv::register_method(ciMethod* target,
980 int entry_bci,
981 CodeOffsets* offsets,
982 int orig_pc_offset,
983 CodeBuffer* code_buffer,
984 int frame_words,
985 OopMapSet* oop_map_set,
986 ExceptionHandlerTable* handler_table,
987 ImplicitExceptionTable* inc_table,
988 AbstractCompiler* compiler,
989 bool has_unsafe_access,
990 bool has_wide_vectors,
991 bool has_monitors,
992 bool has_scoped_access,
993 int immediate_oops_patched) {
994 VM_ENTRY_MARK;
995 nmethod* nm = nullptr;
996 {
997 methodHandle method(THREAD, target->get_Method());
998
999 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1000 if (method->get_method_counters(THREAD) == nullptr) {
1001 record_failure("can't create method counters");
1002 // All buffers in the CodeBuffer are allocated in the CodeCache.
1003 // If the code buffer is created on each compile attempt
1004 // as in C2, then it must be freed.
1005 code_buffer->free_blob();
1006 return;
1007 }
1008
1009 // Check if memory should be freed before allocation
1010 CodeCache::gc_on_allocation();
1011
1012 // To prevent compile queue updates.
1013 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1014
1015 // Prevent InstanceKlass::add_to_hierarchy from running
1016 // and invalidating our dependencies until we install this method.
1017 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1018 MutexLocker ml(Compile_lock);
1019 NoSafepointVerifier nsv;
1020
1021 // Change in Jvmti state may invalidate compilation.
1022 if (!failing() && jvmti_state_changed()) {
1023 record_failure("Jvmti state change invalidated dependencies");
1024 }
1025
1026 // Change in DTrace flags may invalidate compilation.
1027 if (!failing() &&
1028 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1029 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1030 record_failure("DTrace flags change invalidated dependencies");
1031 }
1032
1033 if (!failing() && target->needs_clinit_barrier() &&
1034 target->holder()->is_in_error_state()) {
1035 record_failure("method holder is in error state");
1036 }
1037
1038 if (!failing()) {
1039 if (log() != nullptr) {
1040 // Log the dependencies which this compilation declares.
1041 dependencies()->log_all_dependencies();
1042 }
1043
1044 // Encode the dependencies now, so we can check them right away.
1045 dependencies()->encode_content_bytes();
1046
1047 // Check for {class loads, evolution, breakpoints, ...} during compilation
1048 validate_compile_task_dependencies(target);
1049 }
1050
1051 if (failing()) {
1052 // While not a true deoptimization, it is a preemptive decompile.
1053 MethodData* mdo = method()->method_data();
1054 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1055 mdo->inc_decompile_count();
1056 }
1057
1058 // All buffers in the CodeBuffer are allocated in the CodeCache.
1059 // If the code buffer is created on each compile attempt
1060 // as in C2, then it must be freed.
1061 code_buffer->free_blob();
1062 return;
1063 }
1064
1065 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1066 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1067
1068 nm = nmethod::new_nmethod(method,
1069 compile_id(),
1070 entry_bci,
1071 offsets,
1072 orig_pc_offset,
1073 debug_info(), dependencies(), code_buffer,
1074 frame_words, oop_map_set,
1075 handler_table, inc_table,
1076 compiler, CompLevel(task()->comp_level()));
1077
1078 // Free codeBlobs
1079 code_buffer->free_blob();
1080
1081 if (nm != nullptr) {
1082 nm->set_has_unsafe_access(has_unsafe_access);
1083 nm->set_has_wide_vectors(has_wide_vectors);
1084 nm->set_has_monitors(has_monitors);
1085 nm->set_has_scoped_access(has_scoped_access);
1086 assert(!method->is_synchronized() || nm->has_monitors(), "");
1087
1088 if (entry_bci == InvocationEntryBci) {
1089 if (TieredCompilation) {
1090 // If there is an old version we're done with it
1091 nmethod* old = method->code();
1092 if (TraceMethodReplacement && old != nullptr) {
1093 ResourceMark rm;
1094 char *method_name = method->name_and_sig_as_C_string();
1095 tty->print_cr("Replacing method %s", method_name);
1096 }
1097 if (old != nullptr) {
1098 old->make_not_used();
1099 }
1100 }
1101
1102 LogTarget(Info, nmethod, install) lt;
1103 if (lt.is_enabled()) {
1104 ResourceMark rm;
1105 char *method_name = method->name_and_sig_as_C_string();
1106 lt.print("Installing method (%d) %s ",
1107 task()->comp_level(), method_name);
1108 }
1109 // Allow the code to be executed
1110 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1111 if (nm->make_in_use()) {
1112 method->set_code(method, nm);
1113 }
1114 } else {
1115 LogTarget(Info, nmethod, install) lt;
1116 if (lt.is_enabled()) {
1117 ResourceMark rm;
1118 char *method_name = method->name_and_sig_as_C_string();
1119 lt.print("Installing osr method (%d) %s @ %d",
1120 task()->comp_level(), method_name, entry_bci);
1121 }
1122 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1123 if (nm->make_in_use()) {
1124 method->method_holder()->add_osr_nmethod(nm);
1125 }
1126 }
1127 }
1128 }
1129
1130 NoSafepointVerifier nsv;
1131 if (nm != nullptr) {
1132 // Compilation succeeded, post what we know about it
1133 nm->post_compiled_method(task());
1134 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1135 } else {
1136 // The CodeCache is full.
1137 record_failure("code cache is full");
1138 }
1139
1140 // safepoints are allowed again
1141 }
1142
1143 // ------------------------------------------------------------------
1144 // ciEnv::find_system_klass
1145 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1146 VM_ENTRY_MARK;
1147 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1148 }
1149
1150 // ------------------------------------------------------------------
1151 // ciEnv::comp_level
1152 int ciEnv::comp_level() {
1153 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1154 return task()->comp_level();
1155 }
1156
1157 // ------------------------------------------------------------------
1158 // ciEnv::compile_id
1159 int ciEnv::compile_id() {
1160 if (task() == nullptr) return 0;
1161 return task()->compile_id();
1162 }
1163
1164 // ------------------------------------------------------------------
1165 // ciEnv::notice_inlined_method()
1166 void ciEnv::notice_inlined_method(ciMethod* method) {
1167 _num_inlined_bytecodes += method->code_size_for_inlining();
1168 CompileTrainingData* ctd = task()->training_data();
1169 if (ctd != nullptr) {
1170 GUARDED_VM_ENTRY({
1171 methodHandle mh(Thread::current(), method->get_Method());
1172 ctd->notice_inlined_method(task(), mh);
1173 });
1174 }
1175 }
1176
1177 // ------------------------------------------------------------------
1178 // ciEnv::num_inlined_bytecodes()
1179 int ciEnv::num_inlined_bytecodes() const {
1180 return _num_inlined_bytecodes;
1181 }
1182
1183 // ------------------------------------------------------------------
1184 // ciEnv::record_failure()
1185 void ciEnv::record_failure(const char* reason) {
1186 // record the bailout for hserr envlog
1187 if (reason != nullptr) {
1188 if (CompilationLog::log() != nullptr) {
1189 CompilerThread* thread = CompilerThread::current();
1190 CompileTask* task = thread->task();
1191 CompilationLog::log()->log_failure(thread, task, reason, nullptr);
1192 }
1193 }
1194
1195 if (_failure_reason.get() == nullptr) {
1196 // Record the first failure reason.
1197 _failure_reason.set(reason);
1198 }
1199 }
1200
1201 void ciEnv::report_failure(const char* reason) {
1202 EventCompilationFailure event;
1203 if (event.should_commit()) {
1204 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1205 }
1206 }
1207
1208 // ------------------------------------------------------------------
1209 // ciEnv::record_method_not_compilable()
1210 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1211 int new_compilable =
1212 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1213
1214 // Only note transitions to a worse state
1215 if (new_compilable > _compilable) {
1216 if (log() != nullptr) {
1217 if (all_tiers) {
1218 log()->elem("method_not_compilable");
1219 } else {
1220 log()->elem("method_not_compilable_at_tier level='%d'",
1221 current()->task()->comp_level());
1222 }
1223 }
1224 _compilable = new_compilable;
1225
1226 // Reset failure reason; this one is more important.
1227 _failure_reason.clear();
1228 record_failure(reason);
1229 }
1230 }
1231
1232 // ------------------------------------------------------------------
1233 // ciEnv::record_out_of_memory_failure()
1234 void ciEnv::record_out_of_memory_failure() {
1235 // If memory is low, we stop compiling methods.
1236 record_method_not_compilable("out of memory");
1237 }
1238
1239 ciInstance* ciEnv::unloaded_ciinstance() {
1240 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1241 }
1242
1243 // ------------------------------------------------------------------
1244 // Replay support
1245
1246
1247 // Lookup location descriptor for the class, if any.
1248 // Returns false if not found.
1249 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1250 bool found = false;
1251 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1252 if (!found) {
1253 return false;
1254 }
1255 loc = _dyno_locs->at(pos);
1256 return found;
1257 }
1258
1259 // Associate the current location descriptor with the given class and record for later lookup.
1260 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1261 const char *loc = os::strdup(_dyno_name);
1262 bool found = false;
1263 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1264 if (found) {
1265 _dyno_locs->at_put(pos, loc);
1266 } else {
1267 _dyno_klasses->insert_before(pos, ik);
1268 _dyno_locs->insert_before(pos, loc);
1269 }
1270 }
1271
1272 // Associate the current location descriptor with the given class and record for later lookup.
1273 // If it turns out that there are multiple locations for the given class, that conflict should
1274 // be handled here. Currently we choose the first location found.
1275 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1276 if (!ik->is_hidden()) {
1277 return;
1278 }
1279 const char *loc0;
1280 if (!dyno_loc(ik, loc0)) {
1281 set_dyno_loc(ik);
1282 }
1283 }
1284
1285 // Look up the location descriptor for the given class and print it to the output stream.
1286 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1287 const char *loc;
1288 if (dyno_loc(ik, loc)) {
1289 out->print("%s", loc);
1290 return true;
1291 } else {
1292 return false;
1293 }
1294 }
1295
1296 // Look up the location descriptor for the given class and return it as a string.
1297 // Returns null if no location is found.
1298 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1299 if (ik->is_hidden()) {
1300 stringStream ss;
1301 if (print_dyno_loc(&ss, ik)) {
1302 ss.print(" ;"); // add terminator
1303 const char* call_site = ss.as_string();
1304 return call_site;
1305 }
1306 }
1307 return nullptr;
1308 }
1309
1310 // Look up the location descriptor for the given class and return it as a string.
1311 // Returns the class name as a fallback if no location is found.
1312 const char *ciEnv::replay_name(ciKlass* k) const {
1313 if (k->is_instance_klass()) {
1314 return replay_name(k->as_instance_klass()->get_instanceKlass());
1315 }
1316 return k->name()->as_quoted_ascii();
1317 }
1318
1319 // Look up the location descriptor for the given class and return it as a string.
1320 // Returns the class name as a fallback if no location is found.
1321 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1322 const char* name = dyno_name(ik);
1323 if (name != nullptr) {
1324 return name;
1325 }
1326 return ik->name()->as_quoted_ascii();
1327 }
1328
1329 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1330 void ciEnv::record_member(Thread* thread, oop member) {
1331 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1332 // Check MemberName.clazz field
1333 oop clazz = java_lang_invoke_MemberName::clazz(member);
1334 if (clazz->klass()->is_instance_klass()) {
1335 RecordLocation fp(this, "clazz");
1336 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1337 record_best_dyno_loc(ik);
1338 }
1339 // Check MemberName.method.vmtarget field
1340 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1341 if (vmtarget != nullptr) {
1342 RecordLocation fp2(this, "<vmtarget>");
1343 InstanceKlass* ik = vmtarget->method_holder();
1344 record_best_dyno_loc(ik);
1345 }
1346 }
1347
1348 // Read an object field. Lookup is done by name only.
1349 static inline oop obj_field(oop obj, const char* name) {
1350 return ciReplay::obj_field(obj, name);
1351 }
1352
1353 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1354 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1355 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1356
1357 {
1358 // Check LambdaForm.vmentry field
1359 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1360 RecordLocation fp0(this, "vmentry");
1361 record_member(thread, member);
1362 }
1363
1364 // Check LambdaForm.names array
1365 objArrayOop names = (objArrayOop)obj_field(form, "names");
1366 if (names != nullptr) {
1367 RecordLocation lp0(this, "names");
1368 int len = names->length();
1369 for (int i = 0; i < len; ++i) {
1370 oop name = names->obj_at(i);
1371 RecordLocation lp1(this, "%d", i);
1372 // Check LambdaForm.names[i].function field
1373 RecordLocation lp2(this, "function");
1374 oop function = obj_field(name, "function");
1375 if (function != nullptr) {
1376 // Check LambdaForm.names[i].function.member field
1377 oop member = obj_field(function, "member");
1378 if (member != nullptr) {
1379 RecordLocation lp3(this, "member");
1380 record_member(thread, member);
1381 }
1382 // Check LambdaForm.names[i].function.resolvedHandle field
1383 oop mh = obj_field(function, "resolvedHandle");
1384 if (mh != nullptr) {
1385 RecordLocation lp3(this, "resolvedHandle");
1386 record_mh(thread, mh);
1387 }
1388 // Check LambdaForm.names[i].function.invoker field
1389 oop invoker = obj_field(function, "invoker");
1390 if (invoker != nullptr) {
1391 RecordLocation lp3(this, "invoker");
1392 record_mh(thread, invoker);
1393 }
1394 }
1395 }
1396 }
1397 }
1398
1399 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1400 void ciEnv::record_mh(Thread* thread, oop mh) {
1401 {
1402 // Check MethodHandle.form field
1403 oop form = java_lang_invoke_MethodHandle::form(mh);
1404 RecordLocation fp(this, "form");
1405 record_lambdaform(thread, form);
1406 }
1407 // Check DirectMethodHandle.member field
1408 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1409 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1410 RecordLocation fp(this, "member");
1411 record_member(thread, member);
1412 } else {
1413 // Check <MethodHandle subclass>.argL<n> fields
1414 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1415 char arg_name[] = "argLXX";
1416 int max_arg = 99;
1417 for (int index = 0; index <= max_arg; ++index) {
1418 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1419 oop arg = obj_field(mh, arg_name);
1420 if (arg != nullptr) {
1421 RecordLocation fp(this, "%s", arg_name);
1422 if (arg->klass()->is_instance_klass()) {
1423 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1424 record_best_dyno_loc(ik2);
1425 record_call_site_obj(thread, arg);
1426 }
1427 } else {
1428 break;
1429 }
1430 }
1431 }
1432 }
1433
1434 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1435 // Types currently supported are MethodHandle and CallSite.
1436 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1437 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1438 {
1439 if (obj != nullptr) {
1440 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1441 record_mh(thread, obj);
1442 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1443 oop target = java_lang_invoke_CallSite::target(obj);
1444 if (target->klass()->is_instance_klass()) {
1445 RecordLocation fp(this, "target");
1446 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1447 record_best_dyno_loc(ik);
1448 }
1449 }
1450 }
1451 }
1452
1453 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1454 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1455 InstanceKlass* holder = adapter->method_holder();
1456 if (!holder->is_hidden()) {
1457 return;
1458 }
1459 RecordLocation fp(this, "<adapter>");
1460 record_best_dyno_loc(holder);
1461 }
1462
1463 // Process an invokedynamic call site and record any dynamic locations.
1464 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1465 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(indy_index);
1466 if (indy_info->method() != nullptr) {
1467 // process the adapter
1468 Method* adapter = indy_info->method();
1469 record_call_site_method(thread, adapter);
1470 // process the appendix
1471 oop appendix = cp->resolved_reference_from_indy(indy_index);
1472 {
1473 RecordLocation fp(this, "<appendix>");
1474 record_call_site_obj(thread, appendix);
1475 }
1476 // process the BSM
1477 int pool_index = indy_info->constant_pool_index();
1478 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1479 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1480 {
1481 RecordLocation fp(this, "<bsm>");
1482 record_call_site_obj(thread, bsm);
1483 }
1484 }
1485 }
1486
1487 // Process an invokehandle call site and record any dynamic locations.
1488 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1489 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1490 if (!cp->tag_at(holder_index).is_klass()) {
1491 return; // not resolved
1492 }
1493 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1494 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1495 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1496 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index);
1497 if (method_entry->is_resolved(Bytecodes::_invokehandle)) {
1498 // process the adapter
1499 Method* adapter = method_entry->method();
1500 oop appendix = cp->cache()->appendix_if_resolved(method_entry);
1501 record_call_site_method(thread, adapter);
1502 // process the appendix
1503 {
1504 RecordLocation fp(this, "<appendix>");
1505 record_call_site_obj(thread, appendix);
1506 }
1507 }
1508 }
1509 }
1510
1511 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1512 // constant pool entries and record for future lookup.
1513 void ciEnv::find_dynamic_call_sites() {
1514 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1515 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1516
1517 // Iterate over the class hierarchy
1518 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1519 Klass* sub = iter.klass();
1520 if (sub->is_instance_klass()) {
1521 InstanceKlass *isub = InstanceKlass::cast(sub);
1522 InstanceKlass* ik = isub;
1523 if (!ik->is_linked()) {
1524 continue;
1525 }
1526 if (ik->is_hidden()) {
1527 continue;
1528 }
1529 JavaThread* thread = JavaThread::current();
1530 const constantPoolHandle pool(thread, ik->constants());
1531
1532 // Look for invokedynamic/invokehandle call sites
1533 for (int i = 0; i < ik->methods()->length(); ++i) {
1534 Method* m = ik->methods()->at(i);
1535
1536 BytecodeStream bcs(methodHandle(thread, m));
1537 while (!bcs.is_last_bytecode()) {
1538 Bytecodes::Code opcode = bcs.next();
1539 opcode = bcs.raw_code();
1540 switch (opcode) {
1541 case Bytecodes::_invokedynamic:
1542 case Bytecodes::_invokehandle: {
1543 RecordLocation fp(this, "@bci %s %s %s %d",
1544 ik->name()->as_quoted_ascii(),
1545 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1546 bcs.bci());
1547 if (opcode == Bytecodes::_invokedynamic) {
1548 int index = bcs.get_index_u4();
1549 process_invokedynamic(pool, index, thread);
1550 } else {
1551 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1552 int cp_cache_index = bcs.get_index_u2();
1553 process_invokehandle(pool, cp_cache_index, thread);
1554 }
1555 break;
1556 }
1557 default:
1558 break;
1559 }
1560 }
1561 }
1562
1563 // Look for MethodHandle constant pool entries
1564 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1565 int len = pool->length();
1566 for (int i = 0; i < len; ++i) {
1567 if (pool->tag_at(i).is_method_handle()) {
1568 bool found_it;
1569 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1570 if (mh != nullptr) {
1571 RecordLocation fp(this, "%d", i);
1572 record_mh(thread, mh);
1573 }
1574 }
1575 }
1576 }
1577 }
1578 }
1579
1580 void ciEnv::dump_compile_data(outputStream* out) {
1581 CompileTask* task = this->task();
1582 if (task) {
1583 #ifdef COMPILER2
1584 if (ReplayReduce && compiler_data() != nullptr) {
1585 // Dump C2 "reduced" inlining data.
1586 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1587 }
1588 #endif
1589 Method* method = task->method();
1590 int entry_bci = task->osr_bci();
1591 int comp_level = task->comp_level();
1592 out->print("compile ");
1593 get_method(method)->dump_name_as_ascii(out);
1594 out->print(" %d %d", entry_bci, comp_level);
1595 if (compiler_data() != nullptr) {
1596 if (is_c2_compile(comp_level)) {
1597 #ifdef COMPILER2
1598 // Dump C2 inlining data.
1599 ((Compile*)compiler_data())->dump_inline_data(out);
1600 #endif
1601 } else if (is_c1_compile(comp_level)) {
1602 #ifdef COMPILER1
1603 // Dump C1 inlining data.
1604 ((Compilation*)compiler_data())->dump_inline_data(out);
1605 #endif
1606 }
1607 }
1608 out->cr();
1609 }
1610 }
1611
1612 // Called from VM error reporter, so be careful.
1613 // Don't safepoint or acquire any locks.
1614 //
1615 void ciEnv::dump_replay_data_helper(outputStream* out) {
1616 NoSafepointVerifier no_safepoint;
1617 ResourceMark rm;
1618
1619 assert(this->task() != nullptr, "task must not be null");
1620
1621 dump_replay_data_version(out);
1622 #if INCLUDE_JVMTI
1623 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1624 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1625 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1626 #endif // INCLUDE_JVMTI
1627
1628 find_dynamic_call_sites();
1629
1630 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1631 out->print_cr("# %d ciObject found", objects->length());
1632
1633 // The very first entry is the InstanceKlass of the root method of the current compilation.
1634 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1635
1636 for (int i = 0; i < objects->length(); i++) {
1637 objects->at(i)->dump_replay_data(out);
1638 }
1639
1640 dump_compile_data(out);
1641 out->flush();
1642 }
1643
1644 // Called from VM error reporter, so be careful.
1645 // Don't safepoint or acquire any locks.
1646 //
1647 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1648 GUARDED_VM_ENTRY(
1649 dump_replay_data_helper(out);
1650 )
1651 }
1652
1653 void ciEnv::dump_replay_data(outputStream* out) {
1654 GUARDED_VM_ENTRY(
1655 MutexLocker ml(Compile_lock);
1656 dump_replay_data_helper(out);
1657 )
1658 }
1659
1660 void ciEnv::dump_replay_data(int compile_id) {
1661 char buffer[64];
1662 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1663 if (ret > 0) {
1664 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1665 if (fd != -1) {
1666 FILE* replay_data_file = os::fdopen(fd, "w");
1667 if (replay_data_file != nullptr) {
1668 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1669 dump_replay_data(&replay_data_stream);
1670 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1671 } else {
1672 tty->print_cr("# Can't open file to dump replay data.");
1673 close(fd);
1674 }
1675 }
1676 }
1677 }
1678
1679 void ciEnv::dump_inline_data(int compile_id) {
1680 char buffer[64];
1681 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1682 if (ret > 0) {
1683 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1684 if (fd != -1) {
1685 FILE* inline_data_file = os::fdopen(fd, "w");
1686 if (inline_data_file != nullptr) {
1687 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1688 GUARDED_VM_ENTRY(
1689 MutexLocker ml(Compile_lock);
1690 dump_replay_data_version(&replay_data_stream);
1691 dump_compile_data(&replay_data_stream);
1692 )
1693 replay_data_stream.flush();
1694 tty->print("# Compiler inline data is saved as: ");
1695 tty->print_cr("%s", buffer);
1696 } else {
1697 tty->print_cr("# Can't open file to dump inline data.");
1698 close(fd);
1699 }
1700 }
1701 }
1702 }
1703
1704 void ciEnv::dump_replay_data_version(outputStream* out) {
1705 out->print_cr("version %d", REPLAY_VERSION);
1706 }