1 /*
2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciConstant.hpp"
27 #include "ci/ciEnv.hpp"
28 #include "ci/ciField.hpp"
29 #include "ci/ciInlineKlass.hpp"
30 #include "ci/ciInstance.hpp"
31 #include "ci/ciInstanceKlass.hpp"
32 #include "ci/ciMethod.hpp"
33 #include "ci/ciNullObject.hpp"
34 #include "ci/ciReplay.hpp"
35 #include "ci/ciSymbols.hpp"
36 #include "ci/ciUtilities.inline.hpp"
37 #include "classfile/javaClasses.hpp"
38 #include "classfile/javaClasses.inline.hpp"
39 #include "classfile/systemDictionary.hpp"
40 #include "classfile/vmClasses.hpp"
41 #include "classfile/vmSymbols.hpp"
42 #include "code/codeCache.hpp"
43 #include "code/scopeDesc.hpp"
44 #include "compiler/compilationLog.hpp"
45 #include "compiler/compilationPolicy.hpp"
46 #include "compiler/compileBroker.hpp"
47 #include "compiler/compilerEvent.hpp"
48 #include "compiler/compileLog.hpp"
49 #include "compiler/compileTask.hpp"
50 #include "compiler/disassembler.hpp"
51 #include "gc/shared/collectedHeap.inline.hpp"
52 #include "interpreter/bytecodeStream.hpp"
53 #include "interpreter/linkResolver.hpp"
54 #include "jfr/jfrEvents.hpp"
55 #include "jvm.h"
56 #include "logging/log.hpp"
57 #include "memory/allocation.inline.hpp"
58 #include "memory/oopFactory.hpp"
59 #include "memory/resourceArea.hpp"
60 #include "memory/universe.hpp"
61 #include "oops/constantPool.inline.hpp"
62 #include "oops/cpCache.inline.hpp"
63 #include "oops/method.inline.hpp"
64 #include "oops/methodData.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/resolvedIndyEntry.hpp"
69 #include "oops/symbolHandle.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/handles.inline.hpp"
74 #include "runtime/init.hpp"
75 #include "runtime/javaThread.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/safepointVerifiers.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/macros.hpp"
82 #ifdef COMPILER1
83 #include "c1/c1_Runtime1.hpp"
84 #endif
85 #ifdef COMPILER2
86 #include "opto/runtime.hpp"
87 #endif
88
89 // ciEnv
90 //
91 // This class is the top level broker for requests from the compiler
92 // to the VM.
93
94 ciObject* ciEnv::_null_object_instance;
95
96 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
97 VM_CLASSES_DO(VM_CLASS_DEFN)
98 #undef VM_CLASS_DEFN
99
100 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr;
101 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
102 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
103
104 #ifndef PRODUCT
105 static bool firstEnv = true;
106 #endif /* PRODUCT */
107
108 // ------------------------------------------------------------------
109 // ciEnv::ciEnv
110 ciEnv::ciEnv(CompileTask* task)
111 : _ciEnv_arena(mtCompiler) {
112 VM_ENTRY_MARK;
113
114 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
115 thread->set_env(this);
116 assert(ciEnv::current() == this, "sanity");
117
118 _oop_recorder = nullptr;
119 _debug_info = nullptr;
120 _dependencies = nullptr;
121 _inc_decompile_count_on_failure = true;
122 _compilable = MethodCompilable;
123 _break_at_compile = false;
124 _compiler_data = nullptr;
125 #ifndef PRODUCT
126 assert(!firstEnv, "not initialized properly");
127 #endif /* !PRODUCT */
128
129 _num_inlined_bytecodes = 0;
130 assert(task == nullptr || thread->task() == task, "sanity");
131 if (task != nullptr) {
132 task->mark_started(os::elapsed_counter());
133 }
134 _task = task;
135 _log = nullptr;
136
137 // Temporary buffer for creating symbols and such.
138 _name_buffer = nullptr;
139 _name_buffer_len = 0;
140
141 _arena = &_ciEnv_arena;
142 _factory = new (_arena) ciObjectFactory(_arena, 128);
143
144 // Preload commonly referenced system ciObjects.
145
146 // During VM initialization, these instances have not yet been created.
147 // Assertions ensure that these instances are not accessed before
148 // their initialization.
149
150 assert(Universe::is_fully_initialized(), "should be complete");
151
152 oop o = Universe::null_ptr_exception_instance();
153 assert(o != nullptr, "should have been initialized");
154 _NullPointerException_instance = get_object(o)->as_instance();
155 o = Universe::arithmetic_exception_instance();
156 assert(o != nullptr, "should have been initialized");
157 _ArithmeticException_instance = get_object(o)->as_instance();
158 o = Universe::array_index_out_of_bounds_exception_instance();
159 assert(o != nullptr, "should have been initialized");
160 _ArrayIndexOutOfBoundsException_instance = get_object(o)->as_instance();
161 o = Universe::array_store_exception_instance();
162 assert(o != nullptr, "should have been initialized");
163 _ArrayStoreException_instance = get_object(o)->as_instance();
164 o = Universe::class_cast_exception_instance();
165 assert(o != nullptr, "should have been initialized");
166 _ClassCastException_instance = get_object(o)->as_instance();
167
168 _the_null_string = nullptr;
169 _the_min_jint_string = nullptr;
170
171 _jvmti_redefinition_count = 0;
172 _jvmti_can_hotswap_or_post_breakpoint = false;
173 _jvmti_can_access_local_variables = false;
174 _jvmti_can_post_on_exceptions = false;
175 _jvmti_can_pop_frame = false;
176
177 _dyno_klasses = nullptr;
178 _dyno_locs = nullptr;
179 _dyno_name[0] = '\0';
180 }
181
182 // Record components of a location descriptor string. Components are appended by the constructor and
183 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
184 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
185 //
186 // Example use:
187 //
188 // {
189 // RecordLocation fp(this, "field1");
190 // // location: "field1"
191 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
192 // // location: "field1"
193 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
194 // // location: "field1"
195 // }
196 // // location: ""
197 //
198 // Examples of actual locations
199 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
200 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
201 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
202 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
203 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
204 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
205 class RecordLocation {
206 private:
207 char* end;
208
209 ATTRIBUTE_PRINTF(3, 4)
210 void push(ciEnv* ci, const char* fmt, ...) {
211 va_list args;
212 va_start(args, fmt);
213 push_va(ci, fmt, args);
214 va_end(args);
215 }
216
217 public:
218 ATTRIBUTE_PRINTF(3, 0)
219 void push_va(ciEnv* ci, const char* fmt, va_list args) {
220 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
221 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
222 os::vsnprintf(e, m - e, fmt, args);
223 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
224 }
225
226 // append a new component
227 ATTRIBUTE_PRINTF(3, 4)
228 RecordLocation(ciEnv* ci, const char* fmt, ...) {
229 end = ci->_dyno_name + strlen(ci->_dyno_name);
230 va_list args;
231 va_start(args, fmt);
232 push(ci, " ");
233 push_va(ci, fmt, args);
234 va_end(args);
235 }
236
237 // reset to previous state
238 ~RecordLocation() {
239 *end = '\0';
240 }
241 };
242
243 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
244 ASSERT_IN_VM;
245
246 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
247 CompilerThread* current_thread = CompilerThread::current();
248 assert(current_thread->env() == nullptr, "must be");
249 current_thread->set_env(this);
250 assert(ciEnv::current() == this, "sanity");
251
252 _oop_recorder = nullptr;
253 _debug_info = nullptr;
254 _dependencies = nullptr;
255 _inc_decompile_count_on_failure = true;
256 _compilable = MethodCompilable_never;
257 _break_at_compile = false;
258 _compiler_data = nullptr;
259 #ifndef PRODUCT
260 assert(firstEnv, "must be first");
261 firstEnv = false;
262 #endif /* !PRODUCT */
263
264 _num_inlined_bytecodes = 0;
265 _task = nullptr;
266 _log = nullptr;
267
268 // Temporary buffer for creating symbols and such.
269 _name_buffer = nullptr;
270 _name_buffer_len = 0;
271
272 _arena = arena;
273 _factory = new (_arena) ciObjectFactory(_arena, 128);
274
275 // Preload commonly referenced system ciObjects.
276
277 // During VM initialization, these instances have not yet been created.
278 // Assertions ensure that these instances are not accessed before
279 // their initialization.
280
281 assert(Universe::is_fully_initialized(), "must be");
282
283 _NullPointerException_instance = nullptr;
284 _ArithmeticException_instance = nullptr;
285 _ArrayIndexOutOfBoundsException_instance = nullptr;
286 _ArrayStoreException_instance = nullptr;
287 _ClassCastException_instance = nullptr;
288 _the_null_string = nullptr;
289 _the_min_jint_string = nullptr;
290
291 _jvmti_redefinition_count = 0;
292 _jvmti_can_hotswap_or_post_breakpoint = false;
293 _jvmti_can_access_local_variables = false;
294 _jvmti_can_post_on_exceptions = false;
295 _jvmti_can_pop_frame = false;
296
297 _dyno_klasses = nullptr;
298 _dyno_locs = nullptr;
299 }
300
301 ciEnv::~ciEnv() {
302 GUARDED_VM_ENTRY(
303 CompilerThread* current_thread = CompilerThread::current();
304 _factory->remove_symbols();
305 // Need safepoint to clear the env on the thread. RedefineClasses might
306 // be reading it.
307 current_thread->set_env(nullptr);
308 )
309 }
310
311 // ------------------------------------------------------------------
312 // Cache Jvmti state
313 bool ciEnv::cache_jvmti_state() {
314 VM_ENTRY_MARK;
315 // Get Jvmti capabilities under lock to get consistent values.
316 MutexLocker mu(JvmtiThreadState_lock);
317 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
318 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
319 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
320 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
321 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
322 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
323 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
324 return _task != nullptr && _task->method()->is_old();
325 }
326
327 bool ciEnv::jvmti_state_changed() const {
328 // Some classes were redefined
329 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
330 return true;
331 }
332
333 if (!_jvmti_can_access_local_variables &&
334 JvmtiExport::can_access_local_variables()) {
335 return true;
336 }
337 if (!_jvmti_can_hotswap_or_post_breakpoint &&
338 JvmtiExport::can_hotswap_or_post_breakpoint()) {
339 return true;
340 }
341 if (!_jvmti_can_post_on_exceptions &&
342 JvmtiExport::can_post_on_exceptions()) {
343 return true;
344 }
345 if (!_jvmti_can_pop_frame &&
346 JvmtiExport::can_pop_frame()) {
347 return true;
348 }
349 if (!_jvmti_can_get_owned_monitor_info &&
350 JvmtiExport::can_get_owned_monitor_info()) {
351 return true;
352 }
353 if (!_jvmti_can_walk_any_space &&
354 JvmtiExport::can_walk_any_space()) {
355 return true;
356 }
357
358 return false;
359 }
360
361 // ------------------------------------------------------------------
362 // Cache DTrace flags
363 void ciEnv::cache_dtrace_flags() {
364 // Need lock?
365 _dtrace_method_probes = DTraceMethodProbes;
366 _dtrace_alloc_probes = DTraceAllocProbes;
367 }
368
369 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
370 switch (type) {
371 case T_BOOLEAN: return Boolean_klass();
372 case T_BYTE : return Byte_klass();
373 case T_CHAR : return Character_klass();
374 case T_SHORT : return Short_klass();
375 case T_INT : return Integer_klass();
376 case T_LONG : return Long_klass();
377 case T_FLOAT : return Float_klass();
378 case T_DOUBLE : return Double_klass();
379
380 default:
381 assert(false, "not a primitive: %s", type2name(type));
382 return nullptr;
383 }
384 }
385
386 ciInstance* ciEnv::the_null_string() {
387 if (_the_null_string == nullptr) {
388 VM_ENTRY_MARK;
389 _the_null_string = get_object(Universe::the_null_string())->as_instance();
390 }
391 return _the_null_string;
392 }
393
394 ciInstance* ciEnv::the_min_jint_string() {
395 if (_the_min_jint_string == nullptr) {
396 VM_ENTRY_MARK;
397 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
398 }
399 return _the_min_jint_string;
400 }
401
402 // ------------------------------------------------------------------
403 // ciEnv::get_method_from_handle
404 ciMethod* ciEnv::get_method_from_handle(Method* method) {
405 VM_ENTRY_MARK;
406 return get_metadata(method)->as_method();
407 }
408
409 // ------------------------------------------------------------------
410 // ciEnv::check_klass_accessiblity
411 //
412 // Note: the logic of this method should mirror the logic of
413 // ConstantPool::verify_constant_pool_resolve.
414 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
415 Klass* resolved_klass) {
416 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
417 return true;
418 }
419 if (accessing_klass->is_obj_array_klass()) {
420 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
421 }
422 if (!accessing_klass->is_instance_klass()) {
423 return true;
424 }
425
426 if (resolved_klass->is_objArray_klass()) {
427 // Find the element klass, if this is an array.
428 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
429 }
430 if (resolved_klass->is_instance_klass()) {
431 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
432 InstanceKlass::cast(resolved_klass),
433 true) == Reflection::ACCESS_OK);
434 }
435 return true;
436 }
437
438 // ------------------------------------------------------------------
439 // ciEnv::get_klass_by_name_impl
440 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
441 const constantPoolHandle& cpool,
442 ciSymbol* name,
443 bool require_local) {
444 ASSERT_IN_VM;
445 Thread* current = Thread::current();
446
447 // Now we need to check the SystemDictionary
448 Symbol* sym = name->get_symbol();
449 if (Signature::has_envelope(sym)) {
450 // This is a name from a signature. Strip off the trimmings.
451 // Call recursive to keep scope of strippedsym.
452 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
453 ciSymbol* strippedname = get_symbol(strippedsym);
454 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
455 }
456
457 // Check for prior unloaded klass. The SystemDictionary's answers
458 // can vary over time but the compiler needs consistency.
459 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
460 if (unloaded_klass != nullptr) {
461 if (require_local) return nullptr;
462 return unloaded_klass;
463 }
464
465 Handle loader;
466 Handle domain;
467 if (accessing_klass != nullptr) {
468 loader = Handle(current, accessing_klass->loader());
469 domain = Handle(current, accessing_klass->protection_domain());
470 }
471
472 Klass* found_klass = require_local ?
473 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
474 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
475
476 // If we fail to find an array klass, look again for its element type.
477 // The element type may be available either locally or via constraints.
478 // In either case, if we can find the element type in the system dictionary,
479 // we must build an array type around it. The CI requires array klasses
480 // to be loaded if their element klasses are loaded, except when memory
481 // is exhausted.
482 if (Signature::is_array(sym) &&
483 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
484 sym->char_at(1) == JVM_SIGNATURE_CLASS )) {
485 // We have an unloaded array.
486 // Build it on the fly if the element class exists.
487 SignatureStream ss(sym, false);
488 ss.skip_array_prefix(1);
489 // Get element ciKlass recursively.
490 ciKlass* elem_klass =
491 get_klass_by_name_impl(accessing_klass,
492 cpool,
493 get_symbol(ss.as_symbol()),
494 require_local);
495 if (elem_klass != nullptr && elem_klass->is_loaded()) {
496 // Now make an array for it
497 return ciArrayKlass::make(elem_klass);
498 }
499 }
500
501 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
502 // Look inside the constant pool for pre-resolved class entries.
503 for (int i = cpool->length() - 1; i >= 1; i--) {
504 if (cpool->tag_at(i).is_klass()) {
505 Klass* kls = cpool->resolved_klass_at(i);
506 if (kls->name() == sym) {
507 found_klass = kls;
508 break;
509 }
510 }
511 }
512 }
513
514 if (found_klass != nullptr) {
515 // Found it. Build a CI handle.
516 return get_klass(found_klass);
517 }
518
519 if (require_local) return nullptr;
520
521 // Not yet loaded into the VM, or not governed by loader constraints.
522 // Make a CI representative for it.
523 int i = 0;
524 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
525 i++;
526 }
527 return get_unloaded_klass(accessing_klass, name);
528 }
529
530 // ------------------------------------------------------------------
531 // ciEnv::get_klass_by_name
532 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
533 ciSymbol* klass_name,
534 bool require_local) {
535 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
536 constantPoolHandle(),
537 klass_name,
538 require_local);)
539 }
540
541 // ------------------------------------------------------------------
542 // ciEnv::get_klass_by_index_impl
543 //
544 // Implementation of get_klass_by_index.
545 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
546 int index,
547 bool& is_accessible,
548 ciInstanceKlass* accessor) {
549 Klass* klass = nullptr;
550 Symbol* klass_name = nullptr;
551
552 if (cpool->tag_at(index).is_symbol()) {
553 klass_name = cpool->symbol_at(index);
554 } else {
555 // Check if it's resolved if it's not a symbol constant pool entry.
556 klass = ConstantPool::klass_at_if_loaded(cpool, index);
557 // Try to look it up by name.
558 if (klass == nullptr) {
559 klass_name = cpool->klass_name_at(index);
560 }
561 }
562
563 if (klass == nullptr) {
564 // Not found in constant pool. Use the name to do the lookup.
565 ciKlass* k = get_klass_by_name_impl(accessor,
566 cpool,
567 get_symbol(klass_name),
568 false);
569 // Calculate accessibility the hard way.
570 if (!k->is_loaded()) {
571 is_accessible = false;
572 } else if (k->loader() != accessor->loader() &&
573 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
574 // Loaded only remotely. Not linked yet.
575 is_accessible = false;
576 } else {
577 // Linked locally, and we must also check public/private, etc.
578 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
579 }
580 return k;
581 }
582
583 // Check for prior unloaded klass. The SystemDictionary's answers
584 // can vary over time but the compiler needs consistency.
585 ciSymbol* name = get_symbol(klass->name());
586 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
587 if (unloaded_klass != nullptr) {
588 is_accessible = false;
589 return unloaded_klass;
590 }
591
592 // It is known to be accessible, since it was found in the constant pool.
593 ciKlass* ciKlass = get_klass(klass);
594 is_accessible = true;
595 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
596 // Klass was unresolved at replay dump time and therefore not accessible.
597 is_accessible = false;
598 }
599 return ciKlass;
600 }
601
602 // ------------------------------------------------------------------
603 // ciEnv::get_klass_by_index
604 //
605 // Get a klass from the constant pool.
606 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
607 int index,
608 bool& is_accessible,
609 ciInstanceKlass* accessor) {
610 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
611 }
612
613 // ------------------------------------------------------------------
614 // ciEnv::unbox_primitive_value
615 //
616 // Unbox a primitive and return it as a ciConstant.
617 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
618 jvalue value;
619 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
620 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
621 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
622 return ciConstant();
623 }
624 switch (bt) {
625 case T_BOOLEAN: return ciConstant(bt, value.z);
626 case T_BYTE: return ciConstant(bt, value.b);
627 case T_SHORT: return ciConstant(bt, value.s);
628 case T_CHAR: return ciConstant(bt, value.c);
629 case T_INT: return ciConstant(bt, value.i);
630 case T_LONG: return ciConstant(value.j);
631 case T_FLOAT: return ciConstant(value.f);
632 case T_DOUBLE: return ciConstant(value.d);
633
634 default:
635 assert(false, "not a primitive type: %s", type2name(bt));
636 return ciConstant();
637 }
638 }
639
640 // ------------------------------------------------------------------
641 // ciEnv::get_resolved_constant
642 //
643 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
644 assert(obj_index >= 0, "");
645 oop obj = cpool->resolved_reference_at(obj_index);
646 if (obj == nullptr) {
647 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
648 // Null constant is represented as a sentinel (non-null) value.
649 return ciConstant();
650 } else if (obj == Universe::the_null_sentinel()) {
651 return ciConstant(T_OBJECT, get_object(nullptr));
652 } else {
653 ciObject* ciobj = get_object(obj);
654 if (ciobj->is_array()) {
655 return ciConstant(T_ARRAY, ciobj);
656 } else {
657 int cp_index = cpool->object_to_cp_index(obj_index);
658 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
659 if (is_java_primitive(bt)) {
660 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
661 return unbox_primitive_value(ciobj, bt);
662 } else {
663 assert(ciobj->is_instance(), "should be an instance");
664 return ciConstant(T_OBJECT, ciobj);
665 }
666 }
667 }
668 }
669
670 // ------------------------------------------------------------------
671 // ciEnv::get_constant_by_index_impl
672 //
673 // Implementation of get_constant_by_index().
674 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
675 int index, int obj_index,
676 ciInstanceKlass* accessor) {
677 if (obj_index >= 0) {
678 ciConstant con = get_resolved_constant(cpool, obj_index);
679 if (con.is_valid()) {
680 return con;
681 }
682 }
683 constantTag tag = cpool->tag_at(index);
684 if (tag.is_int()) {
685 return ciConstant(T_INT, (jint)cpool->int_at(index));
686 } else if (tag.is_long()) {
687 return ciConstant((jlong)cpool->long_at(index));
688 } else if (tag.is_float()) {
689 return ciConstant((jfloat)cpool->float_at(index));
690 } else if (tag.is_double()) {
691 return ciConstant((jdouble)cpool->double_at(index));
692 } else if (tag.is_string()) {
693 EXCEPTION_CONTEXT;
694 assert(obj_index >= 0, "should have an object index");
695 oop string = cpool->string_at(index, obj_index, THREAD);
696 if (HAS_PENDING_EXCEPTION) {
697 CLEAR_PENDING_EXCEPTION;
698 record_out_of_memory_failure();
699 return ciConstant();
700 }
701 ciInstance* constant = get_object(string)->as_instance();
702 return ciConstant(T_OBJECT, constant);
703 } else if (tag.is_unresolved_klass_in_error()) {
704 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
705 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
706 bool will_link;
707 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
708 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
709 return ciConstant(T_OBJECT, mirror);
710 } else if (tag.is_method_type() || tag.is_method_type_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 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
714 ciObject* ciobj = get_unloaded_method_type_constant(signature);
715 return ciConstant(T_OBJECT, ciobj);
716 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
717 // must execute Java code to link this CP entry into cache[i].f1
718 assert(obj_index >= 0, "should have an object index");
719 bool ignore_will_link;
720 int ref_kind = cpool->method_handle_ref_kind_at(index);
721 int callee_index = cpool->method_handle_klass_index_at(index);
722 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
723 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
724 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
725 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
726 return ciConstant(T_OBJECT, ciobj);
727 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
728 assert(obj_index >= 0, "should have an object index");
729 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
730 } else {
731 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
732 return ciConstant();
733 }
734 }
735
736 // ------------------------------------------------------------------
737 // ciEnv::get_constant_by_index
738 //
739 // Pull a constant out of the constant pool. How appropriate.
740 //
741 // Implementation note: this query is currently in no way cached.
742 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
743 int pool_index, int cache_index,
744 ciInstanceKlass* accessor) {
745 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
746 }
747
748 // ------------------------------------------------------------------
749 // ciEnv::get_field_by_index_impl
750 //
751 // Implementation of get_field_by_index.
752 //
753 // Implementation note: the results of field lookups are cached
754 // in the accessor klass.
755 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
756 int index, Bytecodes::Code bc) {
757 ciConstantPoolCache* cache = accessor->field_cache();
758 if (cache == nullptr) {
759 ciField* field = new (arena()) ciField(accessor, index, bc);
760 return field;
761 } else {
762 ciField* field = (ciField*)cache->get(index);
763 if (field == nullptr) {
764 field = new (arena()) ciField(accessor, index, bc);
765 cache->insert(index, field);
766 }
767 return field;
768 }
769 }
770
771 // ------------------------------------------------------------------
772 // ciEnv::get_field_by_index
773 //
774 // Get a field by index from a klass's constant pool.
775 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
776 int index, Bytecodes::Code bc) {
777 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
778 }
779
780 // ------------------------------------------------------------------
781 // ciEnv::lookup_method
782 //
783 // Perform an appropriate method lookup based on accessor, holder,
784 // name, signature, and bytecode.
785 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
786 ciKlass* holder,
787 Symbol* name,
788 Symbol* sig,
789 Bytecodes::Code bc,
790 constantTag tag) {
791 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
792 Klass* holder_klass = holder->get_Klass();
793
794 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
795 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
796
797 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
798 LinkInfo::AccessCheck::required,
799 LinkInfo::LoaderConstraintCheck::required,
800 tag);
801 switch (bc) {
802 case Bytecodes::_invokestatic:
803 return LinkResolver::resolve_static_call_or_null(link_info);
804 case Bytecodes::_invokespecial:
805 return LinkResolver::resolve_special_call_or_null(link_info);
806 case Bytecodes::_invokeinterface:
807 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
808 case Bytecodes::_invokevirtual:
809 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
810 default:
811 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
812 return nullptr; // silence compiler warnings
813 }
814 }
815
816
817 // ------------------------------------------------------------------
818 // ciEnv::get_method_by_index_impl
819 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
820 int index, Bytecodes::Code bc,
821 ciInstanceKlass* accessor) {
822 assert(cpool.not_null(), "need constant pool");
823 assert(accessor != nullptr, "need origin of access");
824 if (bc == Bytecodes::_invokedynamic) {
825 // FIXME: code generation could allow for null (unlinked) call site
826 // The call site could be made patchable as follows:
827 // Load the appendix argument from the constant pool.
828 // Test the appendix argument and jump to a known deopt routine if it is null.
829 // Jump through a patchable call site, which is initially a deopt routine.
830 // Patch the call site to the nmethod entry point of the static compiled lambda form.
831 // As with other two-component call sites, both values must be independently verified.
832 assert(index < cpool->cache()->resolved_indy_entries_length(), "impossible");
833 Method* adapter = cpool->resolved_indy_entry_at(index)->method();
834 // Resolved if the adapter is non null.
835 if (adapter != nullptr) {
836 return get_method(adapter);
837 }
838
839 // Fake a method that is equivalent to a declared method.
840 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
841 ciSymbol* name = ciSymbols::invokeBasic_name();
842 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
843 return get_unloaded_method(holder, name, signature, accessor);
844 } else {
845 const int holder_index = cpool->klass_ref_index_at(index, bc);
846 bool holder_is_accessible;
847 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
848
849 // Get the method's name and signature.
850 Symbol* name_sym = cpool->name_ref_at(index, bc);
851 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
852
853 if (cpool->has_preresolution()
854 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
855 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
856 // Short-circuit lookups for JSR 292-related call sites.
857 // That is, do not rely only on name-based lookups, because they may fail
858 // if the names are not resolvable in the boot class loader (7056328).
859 switch (bc) {
860 case Bytecodes::_invokevirtual:
861 case Bytecodes::_invokeinterface:
862 case Bytecodes::_invokespecial:
863 case Bytecodes::_invokestatic:
864 {
865 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
866 if (m != nullptr) {
867 return get_method(m);
868 }
869 }
870 break;
871 default:
872 break;
873 }
874 }
875
876 if (holder_is_accessible) { // Our declared holder is loaded.
877 constantTag tag = cpool->tag_ref_at(index, bc);
878 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
879 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
880 if (m != nullptr &&
881 (bc == Bytecodes::_invokestatic
882 ? m->method_holder()->is_not_initialized()
883 : !m->method_holder()->is_loaded())) {
884 m = nullptr;
885 }
886 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
887 m = nullptr;
888 }
889 if (m != nullptr) {
890 // We found the method.
891 return get_method(m);
892 }
893 }
894
895 // Either the declared holder was not loaded, or the method could
896 // not be found. Create a dummy ciMethod to represent the failed
897 // lookup.
898 ciSymbol* name = get_symbol(name_sym);
899 ciSymbol* signature = get_symbol(sig_sym);
900 return get_unloaded_method(holder, name, signature, accessor);
901 }
902 }
903
904
905 // ------------------------------------------------------------------
906 // ciEnv::get_instance_klass_for_declared_method_holder
907 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
908 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
909 // instead of a ciInstanceKlass. For that case simply pretend that the
910 // declared holder is Object.clone since that's where the call will bottom out.
911 // A more correct fix would trickle out through many interfaces in CI,
912 // requiring ciInstanceKlass* to become ciKlass* and many more places would
913 // require checks to make sure the expected type was found. Given that this
914 // only occurs for clone() the more extensive fix seems like overkill so
915 // instead we simply smear the array type into Object.
916 guarantee(method_holder != nullptr, "no method holder");
917 if (method_holder->is_instance_klass()) {
918 return method_holder->as_instance_klass();
919 } else if (method_holder->is_array_klass()) {
920 return current()->Object_klass();
921 } else {
922 ShouldNotReachHere();
923 }
924 return nullptr;
925 }
926
927
928 // ------------------------------------------------------------------
929 // ciEnv::get_method_by_index
930 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
931 int index, Bytecodes::Code bc,
932 ciInstanceKlass* accessor) {
933 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
934 }
935
936
937 // ------------------------------------------------------------------
938 // ciEnv::name_buffer
939 char *ciEnv::name_buffer(int req_len) {
940 if (_name_buffer_len < req_len) {
941 if (_name_buffer == nullptr) {
942 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
943 _name_buffer_len = req_len;
944 } else {
945 _name_buffer =
946 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
947 _name_buffer_len = req_len;
948 }
949 }
950 return _name_buffer;
951 }
952
953 // ------------------------------------------------------------------
954 // ciEnv::is_in_vm
955 bool ciEnv::is_in_vm() {
956 return JavaThread::current()->thread_state() == _thread_in_vm;
957 }
958
959 // ------------------------------------------------------------------
960 // ciEnv::validate_compile_task_dependencies
961 //
962 // Check for changes during compilation (e.g. class loads, evolution,
963 // breakpoints, call site invalidation).
964 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
965 if (failing()) return; // no need for further checks
966
967 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
968 if (result != Dependencies::end_marker) {
969 if (result == Dependencies::call_site_target_value) {
970 _inc_decompile_count_on_failure = false;
971 record_failure("call site target change");
972 } else if (Dependencies::is_klass_type(result)) {
973 record_failure("concurrent class loading");
974 } else {
975 record_failure("invalid non-klass dependency");
976 }
977 }
978 }
979
980 // ------------------------------------------------------------------
981 // ciEnv::register_method
982 void ciEnv::register_method(ciMethod* target,
983 int entry_bci,
984 CodeOffsets* offsets,
985 int orig_pc_offset,
986 CodeBuffer* code_buffer,
987 int frame_words,
988 OopMapSet* oop_map_set,
989 ExceptionHandlerTable* handler_table,
990 ImplicitExceptionTable* inc_table,
991 AbstractCompiler* compiler,
992 bool has_unsafe_access,
993 bool has_wide_vectors,
994 bool has_monitors,
995 bool has_scoped_access,
996 int immediate_oops_patched) {
997 VM_ENTRY_MARK;
998 nmethod* nm = nullptr;
999 {
1000 methodHandle method(THREAD, target->get_Method());
1001
1002 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1003 if (method->get_method_counters(THREAD) == nullptr) {
1004 record_failure("can't create method counters");
1005 // All buffers in the CodeBuffer are allocated in the CodeCache.
1006 // If the code buffer is created on each compile attempt
1007 // as in C2, then it must be freed.
1008 code_buffer->free_blob();
1009 return;
1010 }
1011
1012 // Check if memory should be freed before allocation
1013 CodeCache::gc_on_allocation();
1014
1015 // To prevent compile queue updates.
1016 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1017
1018 // Prevent InstanceKlass::add_to_hierarchy from running
1019 // and invalidating our dependencies until we install this method.
1020 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1021 MutexLocker ml(Compile_lock);
1022 NoSafepointVerifier nsv;
1023
1024 // Change in Jvmti state may invalidate compilation.
1025 if (!failing() && jvmti_state_changed()) {
1026 record_failure("Jvmti state change invalidated dependencies");
1027 }
1028
1029 // Change in DTrace flags may invalidate compilation.
1030 if (!failing() &&
1031 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1032 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1033 record_failure("DTrace flags change invalidated dependencies");
1034 }
1035
1036 if (!failing() && target->needs_clinit_barrier() &&
1037 target->holder()->is_in_error_state()) {
1038 record_failure("method holder is in error state");
1039 }
1040
1041 if (!failing()) {
1042 if (log() != nullptr) {
1043 // Log the dependencies which this compilation declares.
1044 dependencies()->log_all_dependencies();
1045 }
1046
1047 // Encode the dependencies now, so we can check them right away.
1048 dependencies()->encode_content_bytes();
1049
1050 // Check for {class loads, evolution, breakpoints, ...} during compilation
1051 validate_compile_task_dependencies(target);
1052 }
1053
1054 if (failing()) {
1055 // While not a true deoptimization, it is a preemptive decompile.
1056 MethodData* mdo = method()->method_data();
1057 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1058 mdo->inc_decompile_count();
1059 }
1060
1061 // All buffers in the CodeBuffer are allocated in the CodeCache.
1062 // If the code buffer is created on each compile attempt
1063 // as in C2, then it must be freed.
1064 code_buffer->free_blob();
1065 return;
1066 }
1067
1068 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1069 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1070
1071 nm = nmethod::new_nmethod(method,
1072 compile_id(),
1073 entry_bci,
1074 offsets,
1075 orig_pc_offset,
1076 debug_info(), dependencies(), code_buffer,
1077 frame_words, oop_map_set,
1078 handler_table, inc_table,
1079 compiler, CompLevel(task()->comp_level()));
1080
1081 // Free codeBlobs
1082 code_buffer->free_blob();
1083
1084 if (nm != nullptr) {
1085 nm->set_has_unsafe_access(has_unsafe_access);
1086 nm->set_has_wide_vectors(has_wide_vectors);
1087 nm->set_has_monitors(has_monitors);
1088 nm->set_has_scoped_access(has_scoped_access);
1089 assert(!method->is_synchronized() || nm->has_monitors(), "");
1090
1091 if (entry_bci == InvocationEntryBci) {
1092 if (TieredCompilation) {
1093 // If there is an old version we're done with it
1094 nmethod* old = method->code();
1095 if (TraceMethodReplacement && old != nullptr) {
1096 ResourceMark rm;
1097 char *method_name = method->name_and_sig_as_C_string();
1098 tty->print_cr("Replacing method %s", method_name);
1099 }
1100 if (old != nullptr) {
1101 old->make_not_used();
1102 }
1103 }
1104
1105 LogTarget(Info, nmethod, install) lt;
1106 if (lt.is_enabled()) {
1107 ResourceMark rm;
1108 char *method_name = method->name_and_sig_as_C_string();
1109 lt.print("Installing method (%d) %s ",
1110 task()->comp_level(), method_name);
1111 }
1112 // Allow the code to be executed
1113 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1114 if (nm->make_in_use()) {
1115 method->set_code(method, nm);
1116 }
1117 } else {
1118 LogTarget(Info, nmethod, install) lt;
1119 if (lt.is_enabled()) {
1120 ResourceMark rm;
1121 char *method_name = method->name_and_sig_as_C_string();
1122 lt.print("Installing osr method (%d) %s @ %d",
1123 task()->comp_level(), method_name, entry_bci);
1124 }
1125 MutexLocker ml(NMethodState_lock, Mutex::_no_safepoint_check_flag);
1126 if (nm->make_in_use()) {
1127 method->method_holder()->add_osr_nmethod(nm);
1128 }
1129 }
1130 }
1131 }
1132
1133 NoSafepointVerifier nsv;
1134 if (nm != nullptr) {
1135 // Compilation succeeded, post what we know about it
1136 nm->post_compiled_method(task());
1137 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1138 } else {
1139 // The CodeCache is full.
1140 record_failure("code cache is full");
1141 }
1142
1143 // safepoints are allowed again
1144 }
1145
1146 // ------------------------------------------------------------------
1147 // ciEnv::find_system_klass
1148 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1149 VM_ENTRY_MARK;
1150 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1151 }
1152
1153 // ------------------------------------------------------------------
1154 // ciEnv::comp_level
1155 int ciEnv::comp_level() {
1156 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1157 return task()->comp_level();
1158 }
1159
1160 // ------------------------------------------------------------------
1161 // ciEnv::compile_id
1162 int ciEnv::compile_id() {
1163 if (task() == nullptr) return 0;
1164 return task()->compile_id();
1165 }
1166
1167 // ------------------------------------------------------------------
1168 // ciEnv::notice_inlined_method()
1169 void ciEnv::notice_inlined_method(ciMethod* method) {
1170 _num_inlined_bytecodes += method->code_size_for_inlining();
1171 }
1172
1173 // ------------------------------------------------------------------
1174 // ciEnv::num_inlined_bytecodes()
1175 int ciEnv::num_inlined_bytecodes() const {
1176 return _num_inlined_bytecodes;
1177 }
1178
1179 // ------------------------------------------------------------------
1180 // ciEnv::record_failure()
1181 void ciEnv::record_failure(const char* reason) {
1182 if (_failure_reason.get() == nullptr) {
1183 // Record the first failure reason.
1184 _failure_reason.set(reason);
1185 }
1186 }
1187
1188 void ciEnv::report_failure(const char* reason) {
1189 EventCompilationFailure event;
1190 if (event.should_commit()) {
1191 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1192 }
1193 }
1194
1195 // ------------------------------------------------------------------
1196 // ciEnv::record_method_not_compilable()
1197 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1198 int new_compilable =
1199 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1200
1201 // Only note transitions to a worse state
1202 if (new_compilable > _compilable) {
1203 if (log() != nullptr) {
1204 if (all_tiers) {
1205 log()->elem("method_not_compilable");
1206 } else {
1207 log()->elem("method_not_compilable_at_tier level='%d'",
1208 current()->task()->comp_level());
1209 }
1210 }
1211 _compilable = new_compilable;
1212
1213 // Reset failure reason; this one is more important.
1214 _failure_reason.clear();
1215 record_failure(reason);
1216 }
1217 }
1218
1219 // ------------------------------------------------------------------
1220 // ciEnv::record_out_of_memory_failure()
1221 void ciEnv::record_out_of_memory_failure() {
1222 // If memory is low, we stop compiling methods.
1223 record_method_not_compilable("out of memory");
1224 }
1225
1226 ciInstance* ciEnv::unloaded_ciinstance() {
1227 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1228 }
1229
1230 // ------------------------------------------------------------------
1231 // Replay support
1232
1233
1234 // Lookup location descriptor for the class, if any.
1235 // Returns false if not found.
1236 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1237 bool found = false;
1238 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1239 if (!found) {
1240 return false;
1241 }
1242 loc = _dyno_locs->at(pos);
1243 return found;
1244 }
1245
1246 // Associate the current location descriptor with the given class and record for later lookup.
1247 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1248 const char *loc = os::strdup(_dyno_name);
1249 bool found = false;
1250 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1251 if (found) {
1252 _dyno_locs->at_put(pos, loc);
1253 } else {
1254 _dyno_klasses->insert_before(pos, ik);
1255 _dyno_locs->insert_before(pos, loc);
1256 }
1257 }
1258
1259 // Associate the current location descriptor with the given class and record for later lookup.
1260 // If it turns out that there are multiple locations for the given class, that conflict should
1261 // be handled here. Currently we choose the first location found.
1262 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1263 if (!ik->is_hidden()) {
1264 return;
1265 }
1266 const char *loc0;
1267 if (!dyno_loc(ik, loc0)) {
1268 set_dyno_loc(ik);
1269 }
1270 }
1271
1272 // Look up the location descriptor for the given class and print it to the output stream.
1273 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1274 const char *loc;
1275 if (dyno_loc(ik, loc)) {
1276 out->print("%s", loc);
1277 return true;
1278 } else {
1279 return false;
1280 }
1281 }
1282
1283 // Look up the location descriptor for the given class and return it as a string.
1284 // Returns null if no location is found.
1285 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1286 if (ik->is_hidden()) {
1287 stringStream ss;
1288 if (print_dyno_loc(&ss, ik)) {
1289 ss.print(" ;"); // add terminator
1290 const char* call_site = ss.as_string();
1291 return call_site;
1292 }
1293 }
1294 return nullptr;
1295 }
1296
1297 // Look up the location descriptor for the given class and return it as a string.
1298 // Returns the class name as a fallback if no location is found.
1299 const char *ciEnv::replay_name(ciKlass* k) const {
1300 if (k->is_instance_klass()) {
1301 return replay_name(k->as_instance_klass()->get_instanceKlass());
1302 }
1303 return k->name()->as_quoted_ascii();
1304 }
1305
1306 // Look up the location descriptor for the given class and return it as a string.
1307 // Returns the class name as a fallback if no location is found.
1308 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1309 const char* name = dyno_name(ik);
1310 if (name != nullptr) {
1311 return name;
1312 }
1313 return ik->name()->as_quoted_ascii();
1314 }
1315
1316 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1317 void ciEnv::record_member(Thread* thread, oop member) {
1318 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1319 // Check MemberName.clazz field
1320 oop clazz = java_lang_invoke_MemberName::clazz(member);
1321 if (clazz->klass()->is_instance_klass()) {
1322 RecordLocation fp(this, "clazz");
1323 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1324 record_best_dyno_loc(ik);
1325 }
1326 // Check MemberName.method.vmtarget field
1327 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1328 if (vmtarget != nullptr) {
1329 RecordLocation fp2(this, "<vmtarget>");
1330 InstanceKlass* ik = vmtarget->method_holder();
1331 record_best_dyno_loc(ik);
1332 }
1333 }
1334
1335 // Read an object field. Lookup is done by name only.
1336 static inline oop obj_field(oop obj, const char* name) {
1337 return ciReplay::obj_field(obj, name);
1338 }
1339
1340 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1341 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1342 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1343
1344 {
1345 // Check LambdaForm.vmentry field
1346 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1347 RecordLocation fp0(this, "vmentry");
1348 record_member(thread, member);
1349 }
1350
1351 // Check LambdaForm.names array
1352 objArrayOop names = (objArrayOop)obj_field(form, "names");
1353 if (names != nullptr) {
1354 RecordLocation lp0(this, "names");
1355 int len = names->length();
1356 for (int i = 0; i < len; ++i) {
1357 oop name = names->obj_at(i);
1358 RecordLocation lp1(this, "%d", i);
1359 // Check LambdaForm.names[i].function field
1360 RecordLocation lp2(this, "function");
1361 oop function = obj_field(name, "function");
1362 if (function != nullptr) {
1363 // Check LambdaForm.names[i].function.member field
1364 oop member = obj_field(function, "member");
1365 if (member != nullptr) {
1366 RecordLocation lp3(this, "member");
1367 record_member(thread, member);
1368 }
1369 // Check LambdaForm.names[i].function.resolvedHandle field
1370 oop mh = obj_field(function, "resolvedHandle");
1371 if (mh != nullptr) {
1372 RecordLocation lp3(this, "resolvedHandle");
1373 record_mh(thread, mh);
1374 }
1375 // Check LambdaForm.names[i].function.invoker field
1376 oop invoker = obj_field(function, "invoker");
1377 if (invoker != nullptr) {
1378 RecordLocation lp3(this, "invoker");
1379 record_mh(thread, invoker);
1380 }
1381 }
1382 }
1383 }
1384 }
1385
1386 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1387 void ciEnv::record_mh(Thread* thread, oop mh) {
1388 {
1389 // Check MethodHandle.form field
1390 oop form = java_lang_invoke_MethodHandle::form(mh);
1391 RecordLocation fp(this, "form");
1392 record_lambdaform(thread, form);
1393 }
1394 // Check DirectMethodHandle.member field
1395 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1396 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1397 RecordLocation fp(this, "member");
1398 record_member(thread, member);
1399 } else {
1400 // Check <MethodHandle subclass>.argL<n> fields
1401 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1402 char arg_name[] = "argLXX";
1403 int max_arg = 99;
1404 for (int index = 0; index <= max_arg; ++index) {
1405 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1406 oop arg = obj_field(mh, arg_name);
1407 if (arg != nullptr) {
1408 RecordLocation fp(this, "%s", arg_name);
1409 if (arg->klass()->is_instance_klass()) {
1410 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1411 record_best_dyno_loc(ik2);
1412 record_call_site_obj(thread, arg);
1413 }
1414 } else {
1415 break;
1416 }
1417 }
1418 }
1419 }
1420
1421 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1422 // Types currently supported are MethodHandle and CallSite.
1423 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1424 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1425 {
1426 if (obj != nullptr) {
1427 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1428 record_mh(thread, obj);
1429 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1430 oop target = java_lang_invoke_CallSite::target(obj);
1431 if (target->klass()->is_instance_klass()) {
1432 RecordLocation fp(this, "target");
1433 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1434 record_best_dyno_loc(ik);
1435 }
1436 }
1437 }
1438 }
1439
1440 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1441 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1442 InstanceKlass* holder = adapter->method_holder();
1443 if (!holder->is_hidden()) {
1444 return;
1445 }
1446 RecordLocation fp(this, "<adapter>");
1447 record_best_dyno_loc(holder);
1448 }
1449
1450 // Process an invokedynamic call site and record any dynamic locations.
1451 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1452 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(indy_index);
1453 if (indy_info->method() != nullptr) {
1454 // process the adapter
1455 Method* adapter = indy_info->method();
1456 record_call_site_method(thread, adapter);
1457 // process the appendix
1458 oop appendix = cp->resolved_reference_from_indy(indy_index);
1459 {
1460 RecordLocation fp(this, "<appendix>");
1461 record_call_site_obj(thread, appendix);
1462 }
1463 // process the BSM
1464 int pool_index = indy_info->constant_pool_index();
1465 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1466 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1467 {
1468 RecordLocation fp(this, "<bsm>");
1469 record_call_site_obj(thread, bsm);
1470 }
1471 }
1472 }
1473
1474 // Process an invokehandle call site and record any dynamic locations.
1475 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1476 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1477 if (!cp->tag_at(holder_index).is_klass()) {
1478 return; // not resolved
1479 }
1480 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1481 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1482 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1483 ResolvedMethodEntry* method_entry = cp->resolved_method_entry_at(index);
1484 if (method_entry->is_resolved(Bytecodes::_invokehandle)) {
1485 // process the adapter
1486 Method* adapter = method_entry->method();
1487 oop appendix = cp->cache()->appendix_if_resolved(method_entry);
1488 record_call_site_method(thread, adapter);
1489 // process the appendix
1490 {
1491 RecordLocation fp(this, "<appendix>");
1492 record_call_site_obj(thread, appendix);
1493 }
1494 }
1495 }
1496 }
1497
1498 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1499 // constant pool entries and record for future lookup.
1500 void ciEnv::find_dynamic_call_sites() {
1501 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1502 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1503
1504 // Iterate over the class hierarchy
1505 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1506 Klass* sub = iter.klass();
1507 if (sub->is_instance_klass()) {
1508 InstanceKlass *isub = InstanceKlass::cast(sub);
1509 InstanceKlass* ik = isub;
1510 if (!ik->is_linked()) {
1511 continue;
1512 }
1513 if (ik->is_hidden()) {
1514 continue;
1515 }
1516 JavaThread* thread = JavaThread::current();
1517 const constantPoolHandle pool(thread, ik->constants());
1518
1519 // Look for invokedynamic/invokehandle call sites
1520 for (int i = 0; i < ik->methods()->length(); ++i) {
1521 Method* m = ik->methods()->at(i);
1522
1523 BytecodeStream bcs(methodHandle(thread, m));
1524 while (!bcs.is_last_bytecode()) {
1525 Bytecodes::Code opcode = bcs.next();
1526 opcode = bcs.raw_code();
1527 switch (opcode) {
1528 case Bytecodes::_invokedynamic:
1529 case Bytecodes::_invokehandle: {
1530 RecordLocation fp(this, "@bci %s %s %s %d",
1531 ik->name()->as_quoted_ascii(),
1532 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1533 bcs.bci());
1534 if (opcode == Bytecodes::_invokedynamic) {
1535 int index = bcs.get_index_u4();
1536 process_invokedynamic(pool, index, thread);
1537 } else {
1538 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1539 int cp_cache_index = bcs.get_index_u2();
1540 process_invokehandle(pool, cp_cache_index, thread);
1541 }
1542 break;
1543 }
1544 default:
1545 break;
1546 }
1547 }
1548 }
1549
1550 // Look for MethodHandle constant pool entries
1551 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1552 int len = pool->length();
1553 for (int i = 0; i < len; ++i) {
1554 if (pool->tag_at(i).is_method_handle()) {
1555 bool found_it;
1556 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1557 if (mh != nullptr) {
1558 RecordLocation fp(this, "%d", i);
1559 record_mh(thread, mh);
1560 }
1561 }
1562 }
1563 }
1564 }
1565 }
1566
1567 void ciEnv::dump_compile_data(outputStream* out) {
1568 CompileTask* task = this->task();
1569 if (task) {
1570 #ifdef COMPILER2
1571 if (ReplayReduce && compiler_data() != nullptr) {
1572 // Dump C2 "reduced" inlining data.
1573 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1574 }
1575 #endif
1576 Method* method = task->method();
1577 int entry_bci = task->osr_bci();
1578 int comp_level = task->comp_level();
1579 out->print("compile ");
1580 get_method(method)->dump_name_as_ascii(out);
1581 out->print(" %d %d", entry_bci, comp_level);
1582 if (compiler_data() != nullptr) {
1583 if (is_c2_compile(comp_level)) {
1584 #ifdef COMPILER2
1585 // Dump C2 inlining data.
1586 ((Compile*)compiler_data())->dump_inline_data(out);
1587 #endif
1588 } else if (is_c1_compile(comp_level)) {
1589 #ifdef COMPILER1
1590 // Dump C1 inlining data.
1591 ((Compilation*)compiler_data())->dump_inline_data(out);
1592 #endif
1593 }
1594 }
1595 out->cr();
1596 }
1597 }
1598
1599 // Called from VM error reporter, so be careful.
1600 // Don't safepoint or acquire any locks.
1601 //
1602 void ciEnv::dump_replay_data_helper(outputStream* out) {
1603 NoSafepointVerifier no_safepoint;
1604 ResourceMark rm;
1605
1606 assert(this->task() != nullptr, "task must not be null");
1607
1608 dump_replay_data_version(out);
1609 #if INCLUDE_JVMTI
1610 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1611 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1612 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1613 #endif // INCLUDE_JVMTI
1614
1615 find_dynamic_call_sites();
1616
1617 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1618 out->print_cr("# %d ciObject found", objects->length());
1619
1620 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1621 // protection domain to load subsequent classes during replay compilation.
1622 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1623
1624 for (int i = 0; i < objects->length(); i++) {
1625 objects->at(i)->dump_replay_data(out);
1626 }
1627
1628 dump_compile_data(out);
1629 out->flush();
1630 }
1631
1632 // Called from VM error reporter, so be careful.
1633 // Don't safepoint or acquire any locks.
1634 //
1635 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1636 GUARDED_VM_ENTRY(
1637 dump_replay_data_helper(out);
1638 )
1639 }
1640
1641 void ciEnv::dump_replay_data(outputStream* out) {
1642 GUARDED_VM_ENTRY(
1643 MutexLocker ml(Compile_lock);
1644 dump_replay_data_helper(out);
1645 )
1646 }
1647
1648 void ciEnv::dump_replay_data(int compile_id) {
1649 char buffer[64];
1650 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1651 if (ret > 0) {
1652 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1653 if (fd != -1) {
1654 FILE* replay_data_file = os::fdopen(fd, "w");
1655 if (replay_data_file != nullptr) {
1656 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1657 dump_replay_data(&replay_data_stream);
1658 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1659 } else {
1660 tty->print_cr("# Can't open file to dump replay data.");
1661 close(fd);
1662 }
1663 }
1664 }
1665 }
1666
1667 void ciEnv::dump_inline_data(int compile_id) {
1668 char buffer[64];
1669 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1670 if (ret > 0) {
1671 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1672 if (fd != -1) {
1673 FILE* inline_data_file = os::fdopen(fd, "w");
1674 if (inline_data_file != nullptr) {
1675 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1676 GUARDED_VM_ENTRY(
1677 MutexLocker ml(Compile_lock);
1678 dump_replay_data_version(&replay_data_stream);
1679 dump_compile_data(&replay_data_stream);
1680 )
1681 replay_data_stream.flush();
1682 tty->print("# Compiler inline data is saved as: ");
1683 tty->print_cr("%s", buffer);
1684 } else {
1685 tty->print_cr("# Can't open file to dump inline data.");
1686 close(fd);
1687 }
1688 }
1689 }
1690 }
1691
1692 void ciEnv::dump_replay_data_version(outputStream* out) {
1693 out->print_cr("version %d", REPLAY_VERSION);
1694 }