1 /*
2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciConstant.hpp"
27 #include "ci/ciEnv.hpp"
28 #include "ci/ciField.hpp"
29 #include "ci/ciInstance.hpp"
30 #include "ci/ciInstanceKlass.hpp"
31 #include "ci/ciMethod.hpp"
32 #include "ci/ciNullObject.hpp"
33 #include "ci/ciReplay.hpp"
34 #include "ci/ciSymbols.hpp"
35 #include "ci/ciUtilities.inline.hpp"
36 #include "classfile/javaClasses.hpp"
37 #include "classfile/javaClasses.inline.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "classfile/vmClasses.hpp"
40 #include "classfile/vmSymbols.hpp"
41 #include "code/codeCache.hpp"
42 #include "code/scopeDesc.hpp"
43 #include "compiler/compilationLog.hpp"
44 #include "compiler/compilationPolicy.hpp"
45 #include "compiler/compileBroker.hpp"
46 #include "compiler/compilerEvent.hpp"
47 #include "compiler/compileLog.hpp"
48 #include "compiler/compileTask.hpp"
49 #include "compiler/disassembler.hpp"
50 #include "gc/shared/collectedHeap.inline.hpp"
51 #include "interpreter/bytecodeStream.hpp"
52 #include "interpreter/linkResolver.hpp"
53 #include "jfr/jfrEvents.hpp"
54 #include "jvm.h"
55 #include "logging/log.hpp"
56 #include "memory/allocation.inline.hpp"
57 #include "memory/oopFactory.hpp"
58 #include "memory/resourceArea.hpp"
59 #include "memory/universe.hpp"
60 #include "oops/constantPool.inline.hpp"
61 #include "oops/cpCache.inline.hpp"
62 #include "oops/method.inline.hpp"
63 #include "oops/methodData.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "oops/resolvedIndyEntry.hpp"
68 #include "oops/symbolHandle.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "runtime/fieldDescriptor.inline.hpp"
72 #include "runtime/handles.inline.hpp"
73 #include "runtime/init.hpp"
74 #include "runtime/javaThread.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/safepointVerifiers.hpp"
78 #include "runtime/sharedRuntime.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/macros.hpp"
81 #ifdef COMPILER1
82 #include "c1/c1_Runtime1.hpp"
83 #endif
84 #ifdef COMPILER2
85 #include "opto/runtime.hpp"
86 #endif
87
88 // ciEnv
89 //
90 // This class is the top level broker for requests from the compiler
91 // to the VM.
92
93 ciObject* ciEnv::_null_object_instance;
94
95 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
96 VM_CLASSES_DO(VM_CLASS_DEFN)
97 #undef VM_CLASS_DEFN
98
99 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr;
100 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
101 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
102
103 #ifndef PRODUCT
104 static bool firstEnv = true;
105 #endif /* PRODUCT */
106
107 // ------------------------------------------------------------------
108 // ciEnv::ciEnv
109 ciEnv::ciEnv(CompileTask* task)
110 : _ciEnv_arena(mtCompiler) {
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) {
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 Handle domain;
466 if (accessing_klass != nullptr) {
467 loader = Handle(current, accessing_klass->loader());
468 domain = Handle(current, accessing_klass->protection_domain());
469 }
470
471 Klass* found_klass = require_local ?
472 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
473 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
474
475 // If we fail to find an array klass, look again for its element type.
476 // The element type may be available either locally or via constraints.
477 // In either case, if we can find the element type in the system dictionary,
478 // we must build an array type around it. The CI requires array klasses
479 // to be loaded if their element klasses are loaded, except when memory
480 // is exhausted.
481 if (Signature::is_array(sym) &&
482 (sym->char_at(1) == JVM_SIGNATURE_ARRAY || sym->char_at(1) == JVM_SIGNATURE_CLASS)) {
483 // We have an unloaded array.
484 // Build it on the fly if the element class exists.
485 SignatureStream ss(sym, false);
486 ss.skip_array_prefix(1);
487 // Get element ciKlass recursively.
488 ciKlass* elem_klass =
489 get_klass_by_name_impl(accessing_klass,
490 cpool,
491 get_symbol(ss.as_symbol()),
492 require_local);
493 if (elem_klass != nullptr && elem_klass->is_loaded()) {
494 // Now make an array for it
495 return ciObjArrayKlass::make_impl(elem_klass);
496 }
497 }
498
499 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
500 // Look inside the constant pool for pre-resolved class entries.
501 for (int i = cpool->length() - 1; i >= 1; i--) {
502 if (cpool->tag_at(i).is_klass()) {
503 Klass* kls = cpool->resolved_klass_at(i);
504 if (kls->name() == sym) {
505 found_klass = kls;
506 break;
507 }
508 }
509 }
510 }
511
512 if (found_klass != nullptr) {
513 // Found it. Build a CI handle.
514 return get_klass(found_klass);
515 }
516
517 if (require_local) return nullptr;
518
519 // Not yet loaded into the VM, or not governed by loader constraints.
520 // Make a CI representative for it.
521 return get_unloaded_klass(accessing_klass, name);
522 }
523
524 // ------------------------------------------------------------------
525 // ciEnv::get_klass_by_name
526 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
527 ciSymbol* klass_name,
528 bool require_local) {
529 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
530 constantPoolHandle(),
531 klass_name,
532 require_local);)
533 }
534
535 // ------------------------------------------------------------------
536 // ciEnv::get_klass_by_index_impl
537 //
538 // Implementation of get_klass_by_index.
539 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
540 int index,
541 bool& is_accessible,
542 ciInstanceKlass* accessor) {
543 Klass* klass = nullptr;
544 Symbol* klass_name = nullptr;
545
546 if (cpool->tag_at(index).is_symbol()) {
547 klass_name = cpool->symbol_at(index);
548 } else {
549 // Check if it's resolved if it's not a symbol constant pool entry.
550 klass = ConstantPool::klass_at_if_loaded(cpool, index);
551 // Try to look it up by name.
552 if (klass == nullptr) {
553 klass_name = cpool->klass_name_at(index);
554 }
555 }
556
557 if (klass == nullptr) {
558 // Not found in constant pool. Use the name to do the lookup.
559 ciKlass* k = get_klass_by_name_impl(accessor,
560 cpool,
561 get_symbol(klass_name),
562 false);
563 // Calculate accessibility the hard way.
564 if (!k->is_loaded()) {
565 is_accessible = false;
566 } else if (k->loader() != accessor->loader() &&
567 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
568 // Loaded only remotely. Not linked yet.
569 is_accessible = false;
570 } else {
571 // Linked locally, and we must also check public/private, etc.
572 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
573 }
574 return k;
575 }
576
577 // Check for prior unloaded klass. The SystemDictionary's answers
578 // can vary over time but the compiler needs consistency.
579 ciSymbol* name = get_symbol(klass->name());
580 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
581 if (unloaded_klass != nullptr) {
582 is_accessible = false;
583 return unloaded_klass;
584 }
585
586 // It is known to be accessible, since it was found in the constant pool.
587 ciKlass* ciKlass = get_klass(klass);
588 is_accessible = true;
589 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
590 // Klass was unresolved at replay dump time and therefore not accessible.
591 is_accessible = false;
592 }
593 return ciKlass;
594 }
595
596 // ------------------------------------------------------------------
597 // ciEnv::get_klass_by_index
598 //
599 // Get a klass from the constant pool.
600 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
601 int index,
602 bool& is_accessible,
603 ciInstanceKlass* accessor) {
604 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
605 }
606
607 // ------------------------------------------------------------------
608 // ciEnv::unbox_primitive_value
609 //
610 // Unbox a primitive and return it as a ciConstant.
611 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
612 jvalue value;
613 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
614 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
615 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
616 return ciConstant();
617 }
618 switch (bt) {
619 case T_BOOLEAN: return ciConstant(bt, value.z);
620 case T_BYTE: return ciConstant(bt, value.b);
621 case T_SHORT: return ciConstant(bt, value.s);
622 case T_CHAR: return ciConstant(bt, value.c);
623 case T_INT: return ciConstant(bt, value.i);
624 case T_LONG: return ciConstant(value.j);
625 case T_FLOAT: return ciConstant(value.f);
626 case T_DOUBLE: return ciConstant(value.d);
627
628 default:
629 assert(false, "not a primitive type: %s", type2name(bt));
630 return ciConstant();
631 }
632 }
633
634 // ------------------------------------------------------------------
635 // ciEnv::get_resolved_constant
636 //
637 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
638 assert(obj_index >= 0, "");
639 oop obj = cpool->resolved_reference_at(obj_index);
640 if (obj == nullptr) {
641 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
642 // Null constant is represented as a sentinel (non-null) value.
643 return ciConstant();
644 } else if (obj == Universe::the_null_sentinel()) {
645 return ciConstant(T_OBJECT, get_object(nullptr));
646 } else {
647 ciObject* ciobj = get_object(obj);
648 if (ciobj->is_array()) {
649 return ciConstant(T_ARRAY, ciobj);
650 } else {
651 int cp_index = cpool->object_to_cp_index(obj_index);
652 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
653 if (is_java_primitive(bt)) {
654 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
655 return unbox_primitive_value(ciobj, bt);
656 } else {
657 assert(ciobj->is_instance(), "should be an instance");
658 return ciConstant(T_OBJECT, ciobj);
659 }
660 }
661 }
662 }
663
664 // ------------------------------------------------------------------
665 // ciEnv::get_constant_by_index_impl
666 //
667 // Implementation of get_constant_by_index().
668 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
669 int index, int obj_index,
670 ciInstanceKlass* accessor) {
671 if (obj_index >= 0) {
672 ciConstant con = get_resolved_constant(cpool, obj_index);
673 if (con.is_valid()) {
674 return con;
675 }
676 }
677 constantTag tag = cpool->tag_at(index);
678 if (tag.is_int()) {
679 return ciConstant(T_INT, (jint)cpool->int_at(index));
680 } else if (tag.is_long()) {
681 return ciConstant((jlong)cpool->long_at(index));
682 } else if (tag.is_float()) {
683 return ciConstant((jfloat)cpool->float_at(index));
684 } else if (tag.is_double()) {
685 return ciConstant((jdouble)cpool->double_at(index));
686 } else if (tag.is_string()) {
687 EXCEPTION_CONTEXT;
688 assert(obj_index >= 0, "should have an object index");
689 oop string = cpool->string_at(index, obj_index, THREAD);
690 if (HAS_PENDING_EXCEPTION) {
691 CLEAR_PENDING_EXCEPTION;
692 record_out_of_memory_failure();
693 return ciConstant();
694 }
695 ciInstance* constant = get_object(string)->as_instance();
696 return ciConstant(T_OBJECT, constant);
697 } else if (tag.is_unresolved_klass_in_error()) {
698 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
699 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
700 bool will_link;
701 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
702 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
703 return ciConstant(T_OBJECT, mirror);
704 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
705 // must execute Java code to link this CP entry into cache[i].f1
706 assert(obj_index >= 0, "should have an object index");
707 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
708 ciObject* ciobj = get_unloaded_method_type_constant(signature);
709 return ciConstant(T_OBJECT, ciobj);
710 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
711 // must execute Java code to link this CP entry into cache[i].f1
712 assert(obj_index >= 0, "should have an object index");
713 bool ignore_will_link;
714 int ref_kind = cpool->method_handle_ref_kind_at(index);
715 int callee_index = cpool->method_handle_klass_index_at(index);
716 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
717 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
718 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
719 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
720 return ciConstant(T_OBJECT, ciobj);
721 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
722 assert(obj_index >= 0, "should have an object index");
723 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
724 } else {
725 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
726 return ciConstant();
727 }
728 }
729
730 // ------------------------------------------------------------------
731 // ciEnv::get_constant_by_index
732 //
733 // Pull a constant out of the constant pool. How appropriate.
734 //
735 // Implementation note: this query is currently in no way cached.
736 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
737 int pool_index, int cache_index,
738 ciInstanceKlass* accessor) {
739 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
740 }
741
742 // ------------------------------------------------------------------
743 // ciEnv::get_field_by_index_impl
744 //
745 // Implementation of get_field_by_index.
746 //
747 // Implementation note: the results of field lookups are cached
748 // in the accessor klass.
749 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
750 int index, Bytecodes::Code bc) {
751 ciConstantPoolCache* cache = accessor->field_cache();
752 if (cache == nullptr) {
753 ciField* field = new (arena()) ciField(accessor, index, bc);
754 return field;
755 } else {
756 ciField* field = (ciField*)cache->get(index);
757 if (field == nullptr) {
758 field = new (arena()) ciField(accessor, index, bc);
759 cache->insert(index, field);
760 }
761 return field;
762 }
763 }
764
765 // ------------------------------------------------------------------
766 // ciEnv::get_field_by_index
767 //
768 // Get a field by index from a klass's constant pool.
769 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
770 int index, Bytecodes::Code bc) {
771 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
772 }
773
774 // ------------------------------------------------------------------
775 // ciEnv::lookup_method
776 //
777 // Perform an appropriate method lookup based on accessor, holder,
778 // name, signature, and bytecode.
779 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
780 ciKlass* holder,
781 Symbol* name,
782 Symbol* sig,
783 Bytecodes::Code bc,
784 constantTag tag) {
785 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
786 Klass* holder_klass = holder->get_Klass();
787
788 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
789 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
790
791 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
792 LinkInfo::AccessCheck::required,
793 LinkInfo::LoaderConstraintCheck::required,
794 tag);
795 switch (bc) {
796 case Bytecodes::_invokestatic:
797 return LinkResolver::resolve_static_call_or_null(link_info);
798 case Bytecodes::_invokespecial:
799 return LinkResolver::resolve_special_call_or_null(link_info);
800 case Bytecodes::_invokeinterface:
801 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
802 case Bytecodes::_invokevirtual:
803 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
804 default:
805 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
806 return nullptr; // silence compiler warnings
807 }
808 }
809
810
811 // ------------------------------------------------------------------
812 // ciEnv::get_method_by_index_impl
813 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
814 int index, Bytecodes::Code bc,
815 ciInstanceKlass* accessor) {
816 assert(cpool.not_null(), "need constant pool");
817 assert(accessor != nullptr, "need origin of access");
818 if (bc == Bytecodes::_invokedynamic) {
819 // FIXME: code generation could allow for null (unlinked) call site
820 // The call site could be made patchable as follows:
821 // Load the appendix argument from the constant pool.
822 // Test the appendix argument and jump to a known deopt routine if it is null.
823 // Jump through a patchable call site, which is initially a deopt routine.
824 // Patch the call site to the nmethod entry point of the static compiled lambda form.
825 // As with other two-component call sites, both values must be independently verified.
826 assert(index < cpool->cache()->resolved_indy_entries_length(), "impossible");
827 Method* adapter = cpool->resolved_indy_entry_at(index)->method();
828 // Resolved if the adapter is non null.
829 if (adapter != nullptr) {
830 return get_method(adapter);
831 }
832
833 // Fake a method that is equivalent to a declared method.
834 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
835 ciSymbol* name = ciSymbols::invokeBasic_name();
836 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
837 return get_unloaded_method(holder, name, signature, accessor);
838 } else {
839 const int holder_index = cpool->klass_ref_index_at(index, bc);
840 bool holder_is_accessible;
841 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
842
843 // Get the method's name and signature.
844 Symbol* name_sym = cpool->name_ref_at(index, bc);
845 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
846
847 if (cpool->has_preresolution()
848 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
849 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
850 // Short-circuit lookups for JSR 292-related call sites.
851 // That is, do not rely only on name-based lookups, because they may fail
852 // if the names are not resolvable in the boot class loader (7056328).
853 switch (bc) {
854 case Bytecodes::_invokevirtual:
855 case Bytecodes::_invokeinterface:
856 case Bytecodes::_invokespecial:
857 case Bytecodes::_invokestatic:
858 {
859 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
860 if (m != nullptr) {
861 return get_method(m);
862 }
863 }
864 break;
865 default:
866 break;
867 }
868 }
869
870 if (holder_is_accessible) { // Our declared holder is loaded.
871 constantTag tag = cpool->tag_ref_at(index, bc);
872 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
873 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
874 if (m != nullptr &&
875 (bc == Bytecodes::_invokestatic
876 ? m->method_holder()->is_not_initialized()
877 : !m->method_holder()->is_loaded())) {
878 m = nullptr;
879 }
880 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
881 m = nullptr;
882 }
883 if (m != nullptr) {
884 // We found the method.
885 return get_method(m);
886 }
887 }
888
889 // Either the declared holder was not loaded, or the method could
890 // not be found. Create a dummy ciMethod to represent the failed
891 // lookup.
892 ciSymbol* name = get_symbol(name_sym);
893 ciSymbol* signature = get_symbol(sig_sym);
894 return get_unloaded_method(holder, name, signature, accessor);
895 }
896 }
897
898
899 // ------------------------------------------------------------------
900 // ciEnv::get_instance_klass_for_declared_method_holder
901 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
902 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
903 // instead of a ciInstanceKlass. For that case simply pretend that the
904 // declared holder is Object.clone since that's where the call will bottom out.
905 // A more correct fix would trickle out through many interfaces in CI,
906 // requiring ciInstanceKlass* to become ciKlass* and many more places would
907 // require checks to make sure the expected type was found. Given that this
908 // only occurs for clone() the more extensive fix seems like overkill so
909 // instead we simply smear the array type into Object.
910 guarantee(method_holder != nullptr, "no method holder");
911 if (method_holder->is_instance_klass()) {
912 return method_holder->as_instance_klass();
913 } else if (method_holder->is_array_klass()) {
914 return current()->Object_klass();
915 } else {
916 ShouldNotReachHere();
917 }
918 return nullptr;
919 }
920
921
922 // ------------------------------------------------------------------
923 // ciEnv::get_method_by_index
924 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
925 int index, Bytecodes::Code bc,
926 ciInstanceKlass* accessor) {
927 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
928 }
929
930
931 // ------------------------------------------------------------------
932 // ciEnv::name_buffer
933 char *ciEnv::name_buffer(int req_len) {
934 if (_name_buffer_len < req_len) {
935 if (_name_buffer == nullptr) {
936 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
937 _name_buffer_len = req_len;
938 } else {
939 _name_buffer =
940 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
941 _name_buffer_len = req_len;
942 }
943 }
944 return _name_buffer;
945 }
946
947 // ------------------------------------------------------------------
948 // ciEnv::is_in_vm
949 bool ciEnv::is_in_vm() {
950 return JavaThread::current()->thread_state() == _thread_in_vm;
951 }
952
953 // ------------------------------------------------------------------
954 // ciEnv::validate_compile_task_dependencies
955 //
956 // Check for changes during compilation (e.g. class loads, evolution,
957 // breakpoints, call site invalidation).
958 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
959 if (failing()) return; // no need for further checks
960
961 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
962 if (result != Dependencies::end_marker) {
963 if (result == Dependencies::call_site_target_value) {
964 _inc_decompile_count_on_failure = false;
965 record_failure("call site target change");
966 } else if (Dependencies::is_klass_type(result)) {
967 record_failure("concurrent class loading");
968 } else {
969 record_failure("invalid non-klass dependency");
970 }
971 }
972 }
973
974 // ------------------------------------------------------------------
975 // ciEnv::register_method
976 void ciEnv::register_method(ciMethod* target,
977 int entry_bci,
978 CodeOffsets* offsets,
979 int orig_pc_offset,
980 CodeBuffer* code_buffer,
981 int frame_words,
982 OopMapSet* oop_map_set,
983 ExceptionHandlerTable* handler_table,
984 ImplicitExceptionTable* inc_table,
985 AbstractCompiler* compiler,
986 bool has_unsafe_access,
987 bool has_wide_vectors,
988 bool has_monitors,
989 bool has_scoped_access,
990 int immediate_oops_patched) {
991 VM_ENTRY_MARK;
992 nmethod* nm = nullptr;
993 {
994 methodHandle method(THREAD, target->get_Method());
995
996 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
997 if (method->get_method_counters(THREAD) == nullptr) {
998 record_failure("can't create method counters");
999 // All buffers in the CodeBuffer are allocated in the CodeCache.
1000 // If the code buffer is created on each compile attempt
1001 // as in C2, then it must be freed.
1002 code_buffer->free_blob();
1003 return;
1004 }
1005
1006 // Check if memory should be freed before allocation
1007 CodeCache::gc_on_allocation();
1008
1009 // To prevent compile queue updates.
1010 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1011
1012 // Prevent InstanceKlass::add_to_hierarchy from running
1013 // and invalidating our dependencies until we install this method.
1014 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1015 MutexLocker ml(Compile_lock);
1016 NoSafepointVerifier nsv;
1017
1018 // Change in Jvmti state may invalidate compilation.
1019 if (!failing() && jvmti_state_changed()) {
1020 record_failure("Jvmti state change invalidated dependencies");
1021 }
1022
1023 // Change in DTrace flags may invalidate compilation.
1024 if (!failing() &&
1025 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1026 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1027 record_failure("DTrace flags change invalidated dependencies");
1028 }
1029
1030 if (!failing() && target->needs_clinit_barrier() &&
1031 target->holder()->is_in_error_state()) {
1032 record_failure("method holder is in error state");
1033 }
1034
1035 if (!failing()) {
1036 if (log() != nullptr) {
1037 // Log the dependencies which this compilation declares.
1038 dependencies()->log_all_dependencies();
1039 }
1040
1041 // Encode the dependencies now, so we can check them right away.
1042 dependencies()->encode_content_bytes();
1043
1044 // Check for {class loads, evolution, breakpoints, ...} during compilation
1045 validate_compile_task_dependencies(target);
1046 }
1047
1048 if (failing()) {
1049 // While not a true deoptimization, it is a preemptive decompile.
1050 MethodData* mdo = method()->method_data();
1051 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1052 mdo->inc_decompile_count();
1053 }
1054
1055 // All buffers in the CodeBuffer are allocated in the CodeCache.
1056 // If the code buffer is created on each compile attempt
1057 // as in C2, then it must be freed.
1058 code_buffer->free_blob();
1059 return;
1060 }
1061
1062 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1063 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1064
1065 nm = nmethod::new_nmethod(method,
1066 compile_id(),
1067 entry_bci,
1068 offsets,
1069 orig_pc_offset,
1070 debug_info(), dependencies(), code_buffer,
1071 frame_words, oop_map_set,
1072 handler_table, inc_table,
1073 compiler, CompLevel(task()->comp_level()));
1074
1075 // Free codeBlobs
1076 code_buffer->free_blob();
1077
1078 if (nm != nullptr) {
1079 nm->set_has_unsafe_access(has_unsafe_access);
1080 nm->set_has_wide_vectors(has_wide_vectors);
1081 nm->set_has_monitors(has_monitors);
1082 nm->set_has_scoped_access(has_scoped_access);
1083 assert(!method->is_synchronized() || nm->has_monitors(), "");
1084
1085 if (entry_bci == InvocationEntryBci) {
1086 if (TieredCompilation) {
1087 // If there is an old version we're done with it
1088 nmethod* old = method->code();
1089 if (TraceMethodReplacement && old != nullptr) {
1090 ResourceMark rm;
1091 char *method_name = method->name_and_sig_as_C_string();
1092 tty->print_cr("Replacing method %s", method_name);
1093 }
1094 if (old != nullptr) {
1095 old->make_not_used();
1096 }
1097 }
1098
1099 LogTarget(Info, nmethod, install) lt;
1100 if (lt.is_enabled()) {
1101 ResourceMark rm;
1102 char *method_name = method->name_and_sig_as_C_string();
1103 lt.print("Installing method (%d) %s ",
1104 task()->comp_level(), method_name);
1105 }
1106 // Allow the code to be executed
1107 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1108 if (nm->make_in_use()) {
1109 method->set_code(method, nm);
1110 }
1111 } else {
1112 LogTarget(Info, nmethod, install) lt;
1113 if (lt.is_enabled()) {
1114 ResourceMark rm;
1115 char *method_name = method->name_and_sig_as_C_string();
1116 lt.print("Installing osr method (%d) %s @ %d",
1117 task()->comp_level(), method_name, entry_bci);
1118 }
1119 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1120 if (nm->make_in_use()) {
1121 method->method_holder()->add_osr_nmethod(nm);
1122 }
1123 }
1124 }
1125 }
1126
1127 NoSafepointVerifier nsv;
1128 if (nm != nullptr) {
1129 // Compilation succeeded, post what we know about it
1130 nm->post_compiled_method(task());
1131 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1132 } else {
1133 // The CodeCache is full.
1134 record_failure("code cache is full");
1135 }
1136
1137 // safepoints are allowed again
1138 }
1139
1140 // ------------------------------------------------------------------
1141 // ciEnv::find_system_klass
1142 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1143 VM_ENTRY_MARK;
1144 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1145 }
1146
1147 // ------------------------------------------------------------------
1148 // ciEnv::comp_level
1149 int ciEnv::comp_level() {
1150 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1151 return task()->comp_level();
1152 }
1153
1154 // ------------------------------------------------------------------
1155 // ciEnv::compile_id
1156 int ciEnv::compile_id() {
1157 if (task() == nullptr) return 0;
1158 return task()->compile_id();
1159 }
1160
1161 // ------------------------------------------------------------------
1162 // ciEnv::notice_inlined_method()
1163 void ciEnv::notice_inlined_method(ciMethod* method) {
1164 _num_inlined_bytecodes += method->code_size_for_inlining();
1165 }
1166
1167 // ------------------------------------------------------------------
1168 // ciEnv::num_inlined_bytecodes()
1169 int ciEnv::num_inlined_bytecodes() const {
1170 return _num_inlined_bytecodes;
1171 }
1172
1173 // ------------------------------------------------------------------
1174 // ciEnv::record_failure()
1175 void ciEnv::record_failure(const char* reason) {
1176 if (_failure_reason.get() == nullptr) {
1177 // Record the first failure reason.
1178 _failure_reason.set(reason);
1179 }
1180 }
1181
1182 void ciEnv::report_failure(const char* reason) {
1183 EventCompilationFailure event;
1184 if (event.should_commit()) {
1185 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1186 }
1187 }
1188
1189 // ------------------------------------------------------------------
1190 // ciEnv::record_method_not_compilable()
1191 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1192 int new_compilable =
1193 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1194
1195 // Only note transitions to a worse state
1196 if (new_compilable > _compilable) {
1197 if (log() != nullptr) {
1198 if (all_tiers) {
1199 log()->elem("method_not_compilable");
1200 } else {
1201 log()->elem("method_not_compilable_at_tier level='%d'",
1202 current()->task()->comp_level());
1203 }
1204 }
1205 _compilable = new_compilable;
1206
1207 // Reset failure reason; this one is more important.
1208 _failure_reason.clear();
1209 record_failure(reason);
1210 }
1211 }
1212
1213 // ------------------------------------------------------------------
1214 // ciEnv::record_out_of_memory_failure()
1215 void ciEnv::record_out_of_memory_failure() {
1216 // If memory is low, we stop compiling methods.
1217 record_method_not_compilable("out of memory");
1218 }
1219
1220 ciInstance* ciEnv::unloaded_ciinstance() {
1221 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1222 }
1223
1224 // ------------------------------------------------------------------
1225 // Replay support
1226
1227
1228 // Lookup location descriptor for the class, if any.
1229 // Returns false if not found.
1230 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1231 bool found = false;
1232 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1233 if (!found) {
1234 return false;
1235 }
1236 loc = _dyno_locs->at(pos);
1237 return found;
1238 }
1239
1240 // Associate the current location descriptor with the given class and record for later lookup.
1241 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1242 const char *loc = os::strdup(_dyno_name);
1243 bool found = false;
1244 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1245 if (found) {
1246 _dyno_locs->at_put(pos, loc);
1247 } else {
1248 _dyno_klasses->insert_before(pos, ik);
1249 _dyno_locs->insert_before(pos, loc);
1250 }
1251 }
1252
1253 // Associate the current location descriptor with the given class and record for later lookup.
1254 // If it turns out that there are multiple locations for the given class, that conflict should
1255 // be handled here. Currently we choose the first location found.
1256 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1257 if (!ik->is_hidden()) {
1258 return;
1259 }
1260 const char *loc0;
1261 if (!dyno_loc(ik, loc0)) {
1262 set_dyno_loc(ik);
1263 }
1264 }
1265
1266 // Look up the location descriptor for the given class and print it to the output stream.
1267 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1268 const char *loc;
1269 if (dyno_loc(ik, loc)) {
1270 out->print("%s", loc);
1271 return true;
1272 } else {
1273 return false;
1274 }
1275 }
1276
1277 // Look up the location descriptor for the given class and return it as a string.
1278 // Returns null if no location is found.
1279 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1280 if (ik->is_hidden()) {
1281 stringStream ss;
1282 if (print_dyno_loc(&ss, ik)) {
1283 ss.print(" ;"); // add terminator
1284 const char* call_site = ss.as_string();
1285 return call_site;
1286 }
1287 }
1288 return nullptr;
1289 }
1290
1291 // Look up the location descriptor for the given class and return it as a string.
1292 // Returns the class name as a fallback if no location is found.
1293 const char *ciEnv::replay_name(ciKlass* k) const {
1294 if (k->is_instance_klass()) {
1295 return replay_name(k->as_instance_klass()->get_instanceKlass());
1296 }
1297 return k->name()->as_quoted_ascii();
1298 }
1299
1300 // Look up the location descriptor for the given class and return it as a string.
1301 // Returns the class name as a fallback if no location is found.
1302 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1303 const char* name = dyno_name(ik);
1304 if (name != nullptr) {
1305 return name;
1306 }
1307 return ik->name()->as_quoted_ascii();
1308 }
1309
1310 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1311 void ciEnv::record_member(Thread* thread, oop member) {
1312 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1313 // Check MemberName.clazz field
1314 oop clazz = java_lang_invoke_MemberName::clazz(member);
1315 if (clazz->klass()->is_instance_klass()) {
1316 RecordLocation fp(this, "clazz");
1317 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1318 record_best_dyno_loc(ik);
1319 }
1320 // Check MemberName.method.vmtarget field
1321 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1322 if (vmtarget != nullptr) {
1323 RecordLocation fp2(this, "<vmtarget>");
1324 InstanceKlass* ik = vmtarget->method_holder();
1325 record_best_dyno_loc(ik);
1326 }
1327 }
1328
1329 // Read an object field. Lookup is done by name only.
1330 static inline oop obj_field(oop obj, const char* name) {
1331 return ciReplay::obj_field(obj, name);
1332 }
1333
1334 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1335 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1336 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1337
1338 {
1339 // Check LambdaForm.vmentry field
1340 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1341 RecordLocation fp0(this, "vmentry");
1342 record_member(thread, member);
1343 }
1344
1345 // Check LambdaForm.names array
1346 objArrayOop names = (objArrayOop)obj_field(form, "names");
1347 if (names != nullptr) {
1348 RecordLocation lp0(this, "names");
1349 int len = names->length();
1350 for (int i = 0; i < len; ++i) {
1351 oop name = names->obj_at(i);
1352 RecordLocation lp1(this, "%d", i);
1353 // Check LambdaForm.names[i].function field
1354 RecordLocation lp2(this, "function");
1355 oop function = obj_field(name, "function");
1356 if (function != nullptr) {
1357 // Check LambdaForm.names[i].function.member field
1358 oop member = obj_field(function, "member");
1359 if (member != nullptr) {
1360 RecordLocation lp3(this, "member");
1361 record_member(thread, member);
1362 }
1363 // Check LambdaForm.names[i].function.resolvedHandle field
1364 oop mh = obj_field(function, "resolvedHandle");
1365 if (mh != nullptr) {
1366 RecordLocation lp3(this, "resolvedHandle");
1367 record_mh(thread, mh);
1368 }
1369 // Check LambdaForm.names[i].function.invoker field
1370 oop invoker = obj_field(function, "invoker");
1371 if (invoker != nullptr) {
1372 RecordLocation lp3(this, "invoker");
1373 record_mh(thread, invoker);
1374 }
1375 }
1376 }
1377 }
1378 }
1379
1380 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1381 void ciEnv::record_mh(Thread* thread, oop mh) {
1382 {
1383 // Check MethodHandle.form field
1384 oop form = java_lang_invoke_MethodHandle::form(mh);
1385 RecordLocation fp(this, "form");
1386 record_lambdaform(thread, form);
1387 }
1388 // Check DirectMethodHandle.member field
1389 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1390 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1391 RecordLocation fp(this, "member");
1392 record_member(thread, member);
1393 } else {
1394 // Check <MethodHandle subclass>.argL<n> fields
1395 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1396 char arg_name[] = "argLXX";
1397 int max_arg = 99;
1398 for (int index = 0; index <= max_arg; ++index) {
1399 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1400 oop arg = obj_field(mh, arg_name);
1401 if (arg != nullptr) {
1402 RecordLocation fp(this, "%s", arg_name);
1403 if (arg->klass()->is_instance_klass()) {
1404 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1405 record_best_dyno_loc(ik2);
1406 record_call_site_obj(thread, arg);
1407 }
1408 } else {
1409 break;
1410 }
1411 }
1412 }
1413 }
1414
1415 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1416 // Types currently supported are MethodHandle and CallSite.
1417 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1418 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1419 {
1420 if (obj != nullptr) {
1421 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1422 record_mh(thread, obj);
1423 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1424 oop target = java_lang_invoke_CallSite::target(obj);
1425 if (target->klass()->is_instance_klass()) {
1426 RecordLocation fp(this, "target");
1427 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1428 record_best_dyno_loc(ik);
1429 }
1430 }
1431 }
1432 }
1433
1434 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1435 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1436 InstanceKlass* holder = adapter->method_holder();
1437 if (!holder->is_hidden()) {
1438 return;
1439 }
1440 RecordLocation fp(this, "<adapter>");
1441 record_best_dyno_loc(holder);
1442 }
1443
1444 // Process an invokedynamic call site and record any dynamic locations.
1445 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1446 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(indy_index);
1447 if (indy_info->method() != nullptr) {
1448 // process the adapter
1449 Method* adapter = indy_info->method();
1450 record_call_site_method(thread, adapter);
1451 // process the appendix
1452 oop appendix = cp->resolved_reference_from_indy(indy_index);
1453 {
1454 RecordLocation fp(this, "<appendix>");
1455 record_call_site_obj(thread, appendix);
1456 }
1457 // process the BSM
1458 int pool_index = indy_info->constant_pool_index();
1459 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1460 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1461 {
1462 RecordLocation fp(this, "<bsm>");
1463 record_call_site_obj(thread, bsm);
1464 }
1465 }
1466 }
1467
1468 // Process an invokehandle call site and record any dynamic locations.
1469 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1470 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1471 if (!cp->tag_at(holder_index).is_klass()) {
1472 return; // not resolved
1473 }
1474 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1475 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1476 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1477 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index);
1478 if (method_entry->is_resolved(Bytecodes::_invokehandle)) {
1479 // process the adapter
1480 Method* adapter = method_entry->method();
1481 oop appendix = cp->cache()->appendix_if_resolved(method_entry);
1482 record_call_site_method(thread, adapter);
1483 // process the appendix
1484 {
1485 RecordLocation fp(this, "<appendix>");
1486 record_call_site_obj(thread, appendix);
1487 }
1488 }
1489 }
1490 }
1491
1492 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1493 // constant pool entries and record for future lookup.
1494 void ciEnv::find_dynamic_call_sites() {
1495 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1496 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1497
1498 // Iterate over the class hierarchy
1499 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1500 Klass* sub = iter.klass();
1501 if (sub->is_instance_klass()) {
1502 InstanceKlass *isub = InstanceKlass::cast(sub);
1503 InstanceKlass* ik = isub;
1504 if (!ik->is_linked()) {
1505 continue;
1506 }
1507 if (ik->is_hidden()) {
1508 continue;
1509 }
1510 JavaThread* thread = JavaThread::current();
1511 const constantPoolHandle pool(thread, ik->constants());
1512
1513 // Look for invokedynamic/invokehandle call sites
1514 for (int i = 0; i < ik->methods()->length(); ++i) {
1515 Method* m = ik->methods()->at(i);
1516
1517 BytecodeStream bcs(methodHandle(thread, m));
1518 while (!bcs.is_last_bytecode()) {
1519 Bytecodes::Code opcode = bcs.next();
1520 opcode = bcs.raw_code();
1521 switch (opcode) {
1522 case Bytecodes::_invokedynamic:
1523 case Bytecodes::_invokehandle: {
1524 RecordLocation fp(this, "@bci %s %s %s %d",
1525 ik->name()->as_quoted_ascii(),
1526 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1527 bcs.bci());
1528 if (opcode == Bytecodes::_invokedynamic) {
1529 int index = bcs.get_index_u4();
1530 process_invokedynamic(pool, index, thread);
1531 } else {
1532 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1533 int cp_cache_index = bcs.get_index_u2();
1534 process_invokehandle(pool, cp_cache_index, thread);
1535 }
1536 break;
1537 }
1538 default:
1539 break;
1540 }
1541 }
1542 }
1543
1544 // Look for MethodHandle constant pool entries
1545 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1546 int len = pool->length();
1547 for (int i = 0; i < len; ++i) {
1548 if (pool->tag_at(i).is_method_handle()) {
1549 bool found_it;
1550 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1551 if (mh != nullptr) {
1552 RecordLocation fp(this, "%d", i);
1553 record_mh(thread, mh);
1554 }
1555 }
1556 }
1557 }
1558 }
1559 }
1560
1561 void ciEnv::dump_compile_data(outputStream* out) {
1562 CompileTask* task = this->task();
1563 if (task) {
1564 #ifdef COMPILER2
1565 if (ReplayReduce && compiler_data() != nullptr) {
1566 // Dump C2 "reduced" inlining data.
1567 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1568 }
1569 #endif
1570 Method* method = task->method();
1571 int entry_bci = task->osr_bci();
1572 int comp_level = task->comp_level();
1573 out->print("compile ");
1574 get_method(method)->dump_name_as_ascii(out);
1575 out->print(" %d %d", entry_bci, comp_level);
1576 if (compiler_data() != nullptr) {
1577 if (is_c2_compile(comp_level)) {
1578 #ifdef COMPILER2
1579 // Dump C2 inlining data.
1580 ((Compile*)compiler_data())->dump_inline_data(out);
1581 #endif
1582 } else if (is_c1_compile(comp_level)) {
1583 #ifdef COMPILER1
1584 // Dump C1 inlining data.
1585 ((Compilation*)compiler_data())->dump_inline_data(out);
1586 #endif
1587 }
1588 }
1589 out->cr();
1590 }
1591 }
1592
1593 // Called from VM error reporter, so be careful.
1594 // Don't safepoint or acquire any locks.
1595 //
1596 void ciEnv::dump_replay_data_helper(outputStream* out) {
1597 NoSafepointVerifier no_safepoint;
1598 ResourceMark rm;
1599
1600 assert(this->task() != nullptr, "task must not be null");
1601
1602 dump_replay_data_version(out);
1603 #if INCLUDE_JVMTI
1604 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1605 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1606 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1607 #endif // INCLUDE_JVMTI
1608
1609 find_dynamic_call_sites();
1610
1611 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1612 out->print_cr("# %d ciObject found", objects->length());
1613
1614 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1615 // protection domain to load subsequent classes during replay compilation.
1616 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1617
1618 for (int i = 0; i < objects->length(); i++) {
1619 objects->at(i)->dump_replay_data(out);
1620 }
1621
1622 dump_compile_data(out);
1623 out->flush();
1624 }
1625
1626 // Called from VM error reporter, so be careful.
1627 // Don't safepoint or acquire any locks.
1628 //
1629 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1630 GUARDED_VM_ENTRY(
1631 dump_replay_data_helper(out);
1632 )
1633 }
1634
1635 void ciEnv::dump_replay_data(outputStream* out) {
1636 GUARDED_VM_ENTRY(
1637 MutexLocker ml(Compile_lock);
1638 dump_replay_data_helper(out);
1639 )
1640 }
1641
1642 void ciEnv::dump_replay_data(int compile_id) {
1643 char buffer[64];
1644 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1645 if (ret > 0) {
1646 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1647 if (fd != -1) {
1648 FILE* replay_data_file = os::fdopen(fd, "w");
1649 if (replay_data_file != nullptr) {
1650 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1651 dump_replay_data(&replay_data_stream);
1652 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1653 } else {
1654 tty->print_cr("# Can't open file to dump replay data.");
1655 close(fd);
1656 }
1657 }
1658 }
1659 }
1660
1661 void ciEnv::dump_inline_data(int compile_id) {
1662 char buffer[64];
1663 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1664 if (ret > 0) {
1665 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1666 if (fd != -1) {
1667 FILE* inline_data_file = os::fdopen(fd, "w");
1668 if (inline_data_file != nullptr) {
1669 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1670 GUARDED_VM_ENTRY(
1671 MutexLocker ml(Compile_lock);
1672 dump_replay_data_version(&replay_data_stream);
1673 dump_compile_data(&replay_data_stream);
1674 )
1675 replay_data_stream.flush();
1676 tty->print("# Compiler inline data is saved as: ");
1677 tty->print_cr("%s", buffer);
1678 } else {
1679 tty->print_cr("# Can't open file to dump inline data.");
1680 close(fd);
1681 }
1682 }
1683 }
1684 }
1685
1686 void ciEnv::dump_replay_data_version(outputStream* out) {
1687 out->print_cr("version %d", REPLAY_VERSION);
1688 }