1 /*
2 * Copyright (c) 1999, 2023, 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/symbolHandle.hpp"
69 #include "prims/jvmtiExport.hpp"
70 #include "prims/methodHandles.hpp"
71 #include "runtime/fieldDescriptor.inline.hpp"
72 #include "runtime/handles.inline.hpp"
73 #include "runtime/init.hpp"
74 #include "runtime/javaThread.hpp"
75 #include "runtime/jniHandles.inline.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/safepointVerifiers.hpp"
78 #include "runtime/sharedRuntime.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/macros.hpp"
81 #ifdef COMPILER1
82 #include "c1/c1_Runtime1.hpp"
83 #endif
84 #ifdef COMPILER2
85 #include "opto/runtime.hpp"
86 #endif
87
88 // ciEnv
89 //
90 // This class is the top level broker for requests from the compiler
91 // to the VM.
92
93 ciObject* ciEnv::_null_object_instance;
94
95 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
96 VM_CLASSES_DO(VM_CLASS_DEFN)
97 #undef VM_CLASS_DEFN
98
99 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr;
100 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
101 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
102
103 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = nullptr;
104 jobject ciEnv::_ArrayStoreException_handle = nullptr;
105 jobject ciEnv::_ClassCastException_handle = nullptr;
106
107 #ifndef PRODUCT
108 static bool firstEnv = true;
109 #endif /* PRODUCT */
110
111 // ------------------------------------------------------------------
112 // ciEnv::ciEnv
113 ciEnv::ciEnv(CompileTask* task)
114 : _ciEnv_arena(mtCompiler) {
115 VM_ENTRY_MARK;
116
117 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
118 thread->set_env(this);
119 assert(ciEnv::current() == this, "sanity");
120
121 _oop_recorder = nullptr;
122 _debug_info = nullptr;
123 _dependencies = nullptr;
124 _failure_reason = nullptr;
125 _inc_decompile_count_on_failure = true;
126 _compilable = MethodCompilable;
127 _break_at_compile = false;
128 _compiler_data = nullptr;
129 #ifndef PRODUCT
130 assert(!firstEnv, "not initialized properly");
131 #endif /* !PRODUCT */
132
133 _num_inlined_bytecodes = 0;
134 assert(task == nullptr || thread->task() == task, "sanity");
135 if (task != nullptr) {
136 task->mark_started(os::elapsed_counter());
137 }
138 _task = task;
139 _log = nullptr;
140
141 // Temporary buffer for creating symbols and such.
142 _name_buffer = nullptr;
143 _name_buffer_len = 0;
144
145 _arena = &_ciEnv_arena;
146 _factory = new (_arena) ciObjectFactory(_arena, 128);
147
148 // Preload commonly referenced system ciObjects.
149
150 // During VM initialization, these instances have not yet been created.
151 // Assertions ensure that these instances are not accessed before
152 // their initialization.
153
154 assert(Universe::is_fully_initialized(), "should be complete");
155
156 oop o = Universe::null_ptr_exception_instance();
157 assert(o != nullptr, "should have been initialized");
158 _NullPointerException_instance = get_object(o)->as_instance();
159 o = Universe::arithmetic_exception_instance();
160 assert(o != nullptr, "should have been initialized");
161 _ArithmeticException_instance = get_object(o)->as_instance();
162
163 _ArrayIndexOutOfBoundsException_instance = nullptr;
164 _ArrayStoreException_instance = nullptr;
165 _ClassCastException_instance = nullptr;
166 _the_null_string = nullptr;
167 _the_min_jint_string = nullptr;
168
169 _jvmti_redefinition_count = 0;
170 _jvmti_can_hotswap_or_post_breakpoint = false;
171 _jvmti_can_access_local_variables = false;
172 _jvmti_can_post_on_exceptions = false;
173 _jvmti_can_pop_frame = false;
174
175 _dyno_klasses = nullptr;
176 _dyno_locs = nullptr;
177 _dyno_name[0] = '\0';
178 }
179
180 // Record components of a location descriptor string. Components are appended by the constructor and
181 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
182 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
183 //
184 // Example use:
185 //
186 // {
187 // RecordLocation fp(this, "field1");
188 // // location: "field1"
189 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
190 // // location: "field1"
191 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
192 // // location: "field1"
193 // }
194 // // location: ""
195 //
196 // Examples of actual locations
197 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
198 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
199 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
200 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
201 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
202 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
203 class RecordLocation {
204 private:
205 char* end;
206
207 ATTRIBUTE_PRINTF(3, 4)
208 void push(ciEnv* ci, const char* fmt, ...) {
209 va_list args;
210 va_start(args, fmt);
211 push_va(ci, fmt, args);
212 va_end(args);
213 }
214
215 public:
216 ATTRIBUTE_PRINTF(3, 0)
217 void push_va(ciEnv* ci, const char* fmt, va_list args) {
218 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
219 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
220 os::vsnprintf(e, m - e, fmt, args);
221 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
222 }
223
224 // append a new component
225 ATTRIBUTE_PRINTF(3, 4)
226 RecordLocation(ciEnv* ci, const char* fmt, ...) {
227 end = ci->_dyno_name + strlen(ci->_dyno_name);
228 va_list args;
229 va_start(args, fmt);
230 push(ci, " ");
231 push_va(ci, fmt, args);
232 va_end(args);
233 }
234
235 // reset to previous state
236 ~RecordLocation() {
237 *end = '\0';
238 }
239 };
240
241 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
242 ASSERT_IN_VM;
243
244 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
245 CompilerThread* current_thread = CompilerThread::current();
246 assert(current_thread->env() == nullptr, "must be");
247 current_thread->set_env(this);
248 assert(ciEnv::current() == this, "sanity");
249
250 _oop_recorder = nullptr;
251 _debug_info = nullptr;
252 _dependencies = nullptr;
253 _failure_reason = 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 // ------------------------------------------------------------------
369 // helper for lazy exception creation
370 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
371 VM_ENTRY_MARK;
372 if (handle == nullptr) {
373 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
374 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
375 jobject objh = nullptr;
376 if (ik != nullptr) {
377 oop obj = ik->allocate_instance(THREAD);
378 if (!HAS_PENDING_EXCEPTION)
379 objh = JNIHandles::make_global(Handle(THREAD, obj));
380 }
381 if (HAS_PENDING_EXCEPTION) {
382 CLEAR_PENDING_EXCEPTION;
383 } else {
384 handle = objh;
385 }
386 }
387 oop obj = JNIHandles::resolve(handle);
388 return obj == nullptr? nullptr: get_object(obj)->as_instance();
389 }
390
391 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
392 switch (type) {
393 case T_BOOLEAN: return Boolean_klass();
394 case T_BYTE : return Byte_klass();
395 case T_CHAR : return Character_klass();
396 case T_SHORT : return Short_klass();
397 case T_INT : return Integer_klass();
398 case T_LONG : return Long_klass();
399 case T_FLOAT : return Float_klass();
400 case T_DOUBLE : return Double_klass();
401
402 default:
403 assert(false, "not a primitive: %s", type2name(type));
404 return nullptr;
405 }
406 }
407
408 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
409 if (_ArrayIndexOutOfBoundsException_instance == nullptr) {
410 _ArrayIndexOutOfBoundsException_instance
411 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
412 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
413 }
414 return _ArrayIndexOutOfBoundsException_instance;
415 }
416 ciInstance* ciEnv::ArrayStoreException_instance() {
417 if (_ArrayStoreException_instance == nullptr) {
418 _ArrayStoreException_instance
419 = get_or_create_exception(_ArrayStoreException_handle,
420 vmSymbols::java_lang_ArrayStoreException());
421 }
422 return _ArrayStoreException_instance;
423 }
424 ciInstance* ciEnv::ClassCastException_instance() {
425 if (_ClassCastException_instance == nullptr) {
426 _ClassCastException_instance
427 = get_or_create_exception(_ClassCastException_handle,
428 vmSymbols::java_lang_ClassCastException());
429 }
430 return _ClassCastException_instance;
431 }
432
433 ciInstance* ciEnv::the_null_string() {
434 if (_the_null_string == nullptr) {
435 VM_ENTRY_MARK;
436 _the_null_string = get_object(Universe::the_null_string())->as_instance();
437 }
438 return _the_null_string;
439 }
440
441 ciInstance* ciEnv::the_min_jint_string() {
442 if (_the_min_jint_string == nullptr) {
443 VM_ENTRY_MARK;
444 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
445 }
446 return _the_min_jint_string;
447 }
448
449 // ------------------------------------------------------------------
450 // ciEnv::get_method_from_handle
451 ciMethod* ciEnv::get_method_from_handle(Method* method) {
452 VM_ENTRY_MARK;
453 return get_metadata(method)->as_method();
454 }
455
456 // ------------------------------------------------------------------
457 // ciEnv::check_klass_accessiblity
458 //
459 // Note: the logic of this method should mirror the logic of
460 // ConstantPool::verify_constant_pool_resolve.
461 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
462 Klass* resolved_klass) {
463 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
464 return true;
465 }
466 if (accessing_klass->is_obj_array_klass()) {
467 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
468 }
469 if (!accessing_klass->is_instance_klass()) {
470 return true;
471 }
472
473 if (resolved_klass->is_objArray_klass()) {
474 // Find the element klass, if this is an array.
475 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
476 }
477 if (resolved_klass->is_instance_klass()) {
478 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
479 InstanceKlass::cast(resolved_klass),
480 true) == Reflection::ACCESS_OK);
481 }
482 return true;
483 }
484
485 // ------------------------------------------------------------------
486 // ciEnv::get_klass_by_name_impl
487 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
488 const constantPoolHandle& cpool,
489 ciSymbol* name,
490 bool require_local) {
491 ASSERT_IN_VM;
492 Thread* current = Thread::current();
493
494 // Now we need to check the SystemDictionary
495 Symbol* sym = name->get_symbol();
496 if (Signature::has_envelope(sym)) {
497 // This is a name from a signature. Strip off the trimmings.
498 // Call recursive to keep scope of strippedsym.
499 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
500 ciSymbol* strippedname = get_symbol(strippedsym);
501 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
502 }
503
504 // Check for prior unloaded klass. The SystemDictionary's answers
505 // can vary over time but the compiler needs consistency.
506 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
507 if (unloaded_klass != nullptr) {
508 if (require_local) return nullptr;
509 return unloaded_klass;
510 }
511
512 Handle loader;
513 Handle domain;
514 if (accessing_klass != nullptr) {
515 loader = Handle(current, accessing_klass->loader());
516 domain = Handle(current, accessing_klass->protection_domain());
517 }
518
519 Klass* found_klass = require_local ?
520 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
521 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
522
523 // If we fail to find an array klass, look again for its element type.
524 // The element type may be available either locally or via constraints.
525 // In either case, if we can find the element type in the system dictionary,
526 // we must build an array type around it. The CI requires array klasses
527 // to be loaded if their element klasses are loaded, except when memory
528 // is exhausted.
529 if (Signature::is_array(sym) &&
530 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
531 sym->char_at(1) == JVM_SIGNATURE_CLASS ||
532 sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT )) {
533 // We have an unloaded array.
534 // Build it on the fly if the element class exists.
535 SignatureStream ss(sym, false);
536 ss.skip_array_prefix(1);
537 // Get element ciKlass recursively.
538 ciKlass* elem_klass =
539 get_klass_by_name_impl(accessing_klass,
540 cpool,
541 get_symbol(ss.as_symbol()),
542 require_local);
543 if (elem_klass != nullptr && elem_klass->is_loaded()) {
544 // Now make an array for it
545 bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT;
546 return ciArrayKlass::make(elem_klass, null_free_array);
547 }
548 }
549
550 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
551 // Look inside the constant pool for pre-resolved class entries.
552 for (int i = cpool->length() - 1; i >= 1; i--) {
553 if (cpool->tag_at(i).is_klass()) {
554 Klass* kls = cpool->resolved_klass_at(i);
555 if (kls->name() == sym) {
556 found_klass = kls;
557 break;
558 }
559 }
560 }
561 }
562
563 if (found_klass != nullptr) {
564 // Found it. Build a CI handle.
565 return get_klass(found_klass);
566 }
567
568 if (require_local) return nullptr;
569
570 // Not yet loaded into the VM, or not governed by loader constraints.
571 // Make a CI representative for it.
572 int i = 0;
573 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
574 i++;
575 }
576 if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
577 // An unloaded array class of inline types is an ObjArrayKlass, an
578 // unloaded inline type class is an InstanceKlass. For consistency,
579 // make the signature of the unloaded array of inline type use L
580 // rather than Q.
581 char* new_name = name_buffer(sym->utf8_length()+1);
582 strncpy(new_name, (char*)sym->base(), sym->utf8_length());
583 new_name[i] = JVM_SIGNATURE_CLASS;
584 new_name[sym->utf8_length()] = '\0';
585 return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name));
586 }
587 return get_unloaded_klass(accessing_klass, name);
588 }
589
590 // ------------------------------------------------------------------
591 // ciEnv::get_klass_by_name
592 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
593 ciSymbol* klass_name,
594 bool require_local) {
595 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
596 constantPoolHandle(),
597 klass_name,
598 require_local);)
599 }
600
601 // ------------------------------------------------------------------
602 // ciEnv::get_klass_by_index_impl
603 //
604 // Implementation of get_klass_by_index.
605 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
606 int index,
607 bool& is_accessible,
608 ciInstanceKlass* accessor) {
609 Klass* klass = nullptr;
610 Symbol* klass_name = nullptr;
611
612 if (cpool->tag_at(index).is_symbol()) {
613 klass_name = cpool->symbol_at(index);
614 } else {
615 // Check if it's resolved if it's not a symbol constant pool entry.
616 klass = ConstantPool::klass_at_if_loaded(cpool, index);
617 // Try to look it up by name.
618 if (klass == nullptr) {
619 klass_name = cpool->klass_name_at(index);
620 }
621 }
622
623 if (klass == nullptr) {
624 // Not found in constant pool. Use the name to do the lookup.
625 ciKlass* k = get_klass_by_name_impl(accessor,
626 cpool,
627 get_symbol(klass_name),
628 false);
629 // Calculate accessibility the hard way.
630 if (!k->is_loaded()) {
631 is_accessible = false;
632 } else if (k->loader() != accessor->loader() &&
633 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
634 // Loaded only remotely. Not linked yet.
635 is_accessible = false;
636 } else {
637 // Linked locally, and we must also check public/private, etc.
638 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
639 }
640 return k;
641 }
642
643 // Check for prior unloaded klass. The SystemDictionary's answers
644 // can vary over time but the compiler needs consistency.
645 ciSymbol* name = get_symbol(klass->name());
646 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
647 if (unloaded_klass != nullptr) {
648 is_accessible = false;
649 return unloaded_klass;
650 }
651
652 // It is known to be accessible, since it was found in the constant pool.
653 ciKlass* ciKlass = get_klass(klass);
654 is_accessible = true;
655 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
656 // Klass was unresolved at replay dump time and therefore not accessible.
657 is_accessible = false;
658 }
659 return ciKlass;
660 }
661
662 // ------------------------------------------------------------------
663 // ciEnv::get_klass_by_index
664 //
665 // Get a klass from the constant pool.
666 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
667 int index,
668 bool& is_accessible,
669 ciInstanceKlass* accessor) {
670 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
671 }
672
673 // ------------------------------------------------------------------
674 // ciEnv::is_inline_klass
675 //
676 // Check if the klass is an inline klass.
677 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) {
678 GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();)
679 }
680
681 // ------------------------------------------------------------------
682 // ciEnv::unbox_primitive_value
683 //
684 // Unbox a primitive and return it as a ciConstant.
685 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
686 jvalue value;
687 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
688 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
689 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
690 return ciConstant();
691 }
692 switch (bt) {
693 case T_BOOLEAN: return ciConstant(bt, value.z);
694 case T_BYTE: return ciConstant(bt, value.b);
695 case T_SHORT: return ciConstant(bt, value.s);
696 case T_CHAR: return ciConstant(bt, value.c);
697 case T_INT: return ciConstant(bt, value.i);
698 case T_LONG: return ciConstant(value.j);
699 case T_FLOAT: return ciConstant(value.f);
700 case T_DOUBLE: return ciConstant(value.d);
701
702 default:
703 assert(false, "not a primitive type: %s", type2name(bt));
704 return ciConstant();
705 }
706 }
707
708 // ------------------------------------------------------------------
709 // ciEnv::get_resolved_constant
710 //
711 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
712 assert(obj_index >= 0, "");
713 oop obj = cpool->resolved_reference_at(obj_index);
714 if (obj == nullptr) {
715 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
716 // Null constant is represented as a sentinel (non-null) value.
717 return ciConstant();
718 } else if (obj == Universe::the_null_sentinel()) {
719 return ciConstant(T_OBJECT, get_object(nullptr));
720 } else {
721 ciObject* ciobj = get_object(obj);
722 if (ciobj->is_array()) {
723 return ciConstant(T_ARRAY, ciobj);
724 } else {
725 int cp_index = cpool->object_to_cp_index(obj_index);
726 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
727 if (is_java_primitive(bt)) {
728 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
729 return unbox_primitive_value(ciobj, bt);
730 } else {
731 assert(ciobj->is_instance(), "should be an instance");
732 return ciConstant(T_OBJECT, ciobj);
733 }
734 }
735 }
736 }
737
738 // ------------------------------------------------------------------
739 // ciEnv::get_constant_by_index_impl
740 //
741 // Implementation of get_constant_by_index().
742 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
743 int index, int obj_index,
744 ciInstanceKlass* accessor) {
745 if (obj_index >= 0) {
746 ciConstant con = get_resolved_constant(cpool, obj_index);
747 if (con.is_valid()) {
748 return con;
749 }
750 }
751 constantTag tag = cpool->tag_at(index);
752 if (tag.is_int()) {
753 return ciConstant(T_INT, (jint)cpool->int_at(index));
754 } else if (tag.is_long()) {
755 return ciConstant((jlong)cpool->long_at(index));
756 } else if (tag.is_float()) {
757 return ciConstant((jfloat)cpool->float_at(index));
758 } else if (tag.is_double()) {
759 return ciConstant((jdouble)cpool->double_at(index));
760 } else if (tag.is_string()) {
761 EXCEPTION_CONTEXT;
762 assert(obj_index >= 0, "should have an object index");
763 oop string = cpool->string_at(index, obj_index, THREAD);
764 if (HAS_PENDING_EXCEPTION) {
765 CLEAR_PENDING_EXCEPTION;
766 record_out_of_memory_failure();
767 return ciConstant();
768 }
769 ciInstance* constant = get_object(string)->as_instance();
770 return ciConstant(T_OBJECT, constant);
771 } else if (tag.is_unresolved_klass_in_error()) {
772 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
773 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
774 bool will_link;
775 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
776 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
777 if (klass->is_loaded() && tag.is_Qdescriptor_klass()) {
778 return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror());
779 } else {
780 return ciConstant(T_OBJECT, mirror);
781 }
782 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
783 // must execute Java code to link this CP entry into cache[i].f1
784 assert(obj_index >= 0, "should have an object index");
785 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
786 ciObject* ciobj = get_unloaded_method_type_constant(signature);
787 return ciConstant(T_OBJECT, ciobj);
788 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
789 // must execute Java code to link this CP entry into cache[i].f1
790 assert(obj_index >= 0, "should have an object index");
791 bool ignore_will_link;
792 int ref_kind = cpool->method_handle_ref_kind_at(index);
793 int callee_index = cpool->method_handle_klass_index_at(index);
794 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
795 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
796 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
797 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
798 return ciConstant(T_OBJECT, ciobj);
799 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
800 assert(obj_index >= 0, "should have an object index");
801 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
802 } else {
803 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
804 return ciConstant();
805 }
806 }
807
808 // ------------------------------------------------------------------
809 // ciEnv::get_constant_by_index
810 //
811 // Pull a constant out of the constant pool. How appropriate.
812 //
813 // Implementation note: this query is currently in no way cached.
814 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
815 int pool_index, int cache_index,
816 ciInstanceKlass* accessor) {
817 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
818 }
819
820 // ------------------------------------------------------------------
821 // ciEnv::get_field_by_index_impl
822 //
823 // Implementation of get_field_by_index.
824 //
825 // Implementation note: the results of field lookups are cached
826 // in the accessor klass.
827 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
828 int index) {
829 ciConstantPoolCache* cache = accessor->field_cache();
830 if (cache == nullptr) {
831 ciField* field = new (arena()) ciField(accessor, index);
832 return field;
833 } else {
834 ciField* field = (ciField*)cache->get(index);
835 if (field == nullptr) {
836 field = new (arena()) ciField(accessor, index);
837 cache->insert(index, field);
838 }
839 return field;
840 }
841 }
842
843 // ------------------------------------------------------------------
844 // ciEnv::get_field_by_index
845 //
846 // Get a field by index from a klass's constant pool.
847 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
848 int index) {
849 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
850 }
851
852 // ------------------------------------------------------------------
853 // ciEnv::lookup_method
854 //
855 // Perform an appropriate method lookup based on accessor, holder,
856 // name, signature, and bytecode.
857 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
858 ciKlass* holder,
859 Symbol* name,
860 Symbol* sig,
861 Bytecodes::Code bc,
862 constantTag tag) {
863 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
864 Klass* holder_klass = holder->get_Klass();
865
866 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
867 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
868
869 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
870 LinkInfo::AccessCheck::required,
871 LinkInfo::LoaderConstraintCheck::required,
872 tag);
873 switch (bc) {
874 case Bytecodes::_invokestatic:
875 return LinkResolver::resolve_static_call_or_null(link_info);
876 case Bytecodes::_invokespecial:
877 return LinkResolver::resolve_special_call_or_null(link_info);
878 case Bytecodes::_invokeinterface:
879 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
880 case Bytecodes::_invokevirtual:
881 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
882 default:
883 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
884 return nullptr; // silence compiler warnings
885 }
886 }
887
888
889 // ------------------------------------------------------------------
890 // ciEnv::get_method_by_index_impl
891 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
892 int index, Bytecodes::Code bc,
893 ciInstanceKlass* accessor) {
894 assert(cpool.not_null(), "need constant pool");
895 assert(accessor != nullptr, "need origin of access");
896 if (bc == Bytecodes::_invokedynamic) {
897 // FIXME: code generation could allow for null (unlinked) call site
898 // The call site could be made patchable as follows:
899 // Load the appendix argument from the constant pool.
900 // Test the appendix argument and jump to a known deopt routine if it is null.
901 // Jump through a patchable call site, which is initially a deopt routine.
902 // Patch the call site to the nmethod entry point of the static compiled lambda form.
903 // As with other two-component call sites, both values must be independently verified.
904 int indy_index = cpool->decode_invokedynamic_index(index);
905 assert (indy_index >= 0, "should be");
906 assert(indy_index < cpool->cache()->resolved_indy_entries_length(), "impossible");
907 Method* adapter = cpool->resolved_indy_entry_at(indy_index)->method();
908 // Resolved if the adapter is non null.
909 if (adapter != nullptr) {
910 return get_method(adapter);
911 }
912
913 // Fake a method that is equivalent to a declared method.
914 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
915 ciSymbol* name = ciSymbols::invokeBasic_name();
916 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index));
917 return get_unloaded_method(holder, name, signature, accessor);
918 } else {
919 const int holder_index = cpool->klass_ref_index_at(index);
920 bool holder_is_accessible;
921 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
922
923 // Get the method's name and signature.
924 Symbol* name_sym = cpool->name_ref_at(index);
925 Symbol* sig_sym = cpool->signature_ref_at(index);
926
927 if (cpool->has_preresolution()
928 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
929 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
930 // Short-circuit lookups for JSR 292-related call sites.
931 // That is, do not rely only on name-based lookups, because they may fail
932 // if the names are not resolvable in the boot class loader (7056328).
933 switch (bc) {
934 case Bytecodes::_invokevirtual:
935 case Bytecodes::_invokeinterface:
936 case Bytecodes::_invokespecial:
937 case Bytecodes::_invokestatic:
938 {
939 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
940 if (m != nullptr) {
941 return get_method(m);
942 }
943 }
944 break;
945 default:
946 break;
947 }
948 }
949
950 if (holder_is_accessible) { // Our declared holder is loaded.
951 constantTag tag = cpool->tag_ref_at(index);
952 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
953 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
954 if (m != nullptr &&
955 (bc == Bytecodes::_invokestatic
956 ? m->method_holder()->is_not_initialized()
957 : !m->method_holder()->is_loaded())) {
958 m = nullptr;
959 }
960 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
961 m = nullptr;
962 }
963 if (m != nullptr) {
964 // We found the method.
965 return get_method(m);
966 }
967 }
968
969 // Either the declared holder was not loaded, or the method could
970 // not be found. Create a dummy ciMethod to represent the failed
971 // lookup.
972 ciSymbol* name = get_symbol(name_sym);
973 ciSymbol* signature = get_symbol(sig_sym);
974 return get_unloaded_method(holder, name, signature, accessor);
975 }
976 }
977
978
979 // ------------------------------------------------------------------
980 // ciEnv::get_instance_klass_for_declared_method_holder
981 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
982 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
983 // instead of a ciInstanceKlass. For that case simply pretend that the
984 // declared holder is Object.clone since that's where the call will bottom out.
985 // A more correct fix would trickle out through many interfaces in CI,
986 // requiring ciInstanceKlass* to become ciKlass* and many more places would
987 // require checks to make sure the expected type was found. Given that this
988 // only occurs for clone() the more extensive fix seems like overkill so
989 // instead we simply smear the array type into Object.
990 guarantee(method_holder != nullptr, "no method holder");
991 if (method_holder->is_instance_klass()) {
992 return method_holder->as_instance_klass();
993 } else if (method_holder->is_array_klass()) {
994 return current()->Object_klass();
995 } else {
996 ShouldNotReachHere();
997 }
998 return nullptr;
999 }
1000
1001
1002 // ------------------------------------------------------------------
1003 // ciEnv::get_method_by_index
1004 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
1005 int index, Bytecodes::Code bc,
1006 ciInstanceKlass* accessor) {
1007 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
1008 }
1009
1010
1011 // ------------------------------------------------------------------
1012 // ciEnv::name_buffer
1013 char *ciEnv::name_buffer(int req_len) {
1014 if (_name_buffer_len < req_len) {
1015 if (_name_buffer == nullptr) {
1016 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
1017 _name_buffer_len = req_len;
1018 } else {
1019 _name_buffer =
1020 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
1021 _name_buffer_len = req_len;
1022 }
1023 }
1024 return _name_buffer;
1025 }
1026
1027 // ------------------------------------------------------------------
1028 // ciEnv::is_in_vm
1029 bool ciEnv::is_in_vm() {
1030 return JavaThread::current()->thread_state() == _thread_in_vm;
1031 }
1032
1033 // ------------------------------------------------------------------
1034 // ciEnv::validate_compile_task_dependencies
1035 //
1036 // Check for changes during compilation (e.g. class loads, evolution,
1037 // breakpoints, call site invalidation).
1038 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1039 if (failing()) return; // no need for further checks
1040
1041 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1042 if (result != Dependencies::end_marker) {
1043 if (result == Dependencies::call_site_target_value) {
1044 _inc_decompile_count_on_failure = false;
1045 record_failure("call site target change");
1046 } else if (Dependencies::is_klass_type(result)) {
1047 record_failure("concurrent class loading");
1048 } else {
1049 record_failure("invalid non-klass dependency");
1050 }
1051 }
1052 }
1053
1054 // ------------------------------------------------------------------
1055 // ciEnv::register_method
1056 void ciEnv::register_method(ciMethod* target,
1057 int entry_bci,
1058 CodeOffsets* offsets,
1059 int orig_pc_offset,
1060 CodeBuffer* code_buffer,
1061 int frame_words,
1062 OopMapSet* oop_map_set,
1063 ExceptionHandlerTable* handler_table,
1064 ImplicitExceptionTable* inc_table,
1065 AbstractCompiler* compiler,
1066 bool has_unsafe_access,
1067 bool has_wide_vectors,
1068 bool has_monitors,
1069 int immediate_oops_patched,
1070 RTMState rtm_state) {
1071 VM_ENTRY_MARK;
1072 nmethod* nm = nullptr;
1073 {
1074 methodHandle method(THREAD, target->get_Method());
1075
1076 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1077 if (method->get_method_counters(THREAD) == nullptr) {
1078 record_failure("can't create method counters");
1079 // All buffers in the CodeBuffer are allocated in the CodeCache.
1080 // If the code buffer is created on each compile attempt
1081 // as in C2, then it must be freed.
1082 code_buffer->free_blob();
1083 return;
1084 }
1085
1086 // Check if memory should be freed before allocation
1087 CodeCache::gc_on_allocation();
1088
1089 // To prevent compile queue updates.
1090 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1091
1092 // Prevent InstanceKlass::add_to_hierarchy from running
1093 // and invalidating our dependencies until we install this method.
1094 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1095 MutexLocker ml(Compile_lock);
1096 NoSafepointVerifier nsv;
1097
1098 // Change in Jvmti state may invalidate compilation.
1099 if (!failing() && jvmti_state_changed()) {
1100 record_failure("Jvmti state change invalidated dependencies");
1101 }
1102
1103 // Change in DTrace flags may invalidate compilation.
1104 if (!failing() &&
1105 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1106 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1107 record_failure("DTrace flags change invalidated dependencies");
1108 }
1109
1110 if (!failing() && target->needs_clinit_barrier() &&
1111 target->holder()->is_in_error_state()) {
1112 record_failure("method holder is in error state");
1113 }
1114
1115 if (!failing()) {
1116 if (log() != nullptr) {
1117 // Log the dependencies which this compilation declares.
1118 dependencies()->log_all_dependencies();
1119 }
1120
1121 // Encode the dependencies now, so we can check them right away.
1122 dependencies()->encode_content_bytes();
1123
1124 // Check for {class loads, evolution, breakpoints, ...} during compilation
1125 validate_compile_task_dependencies(target);
1126 }
1127 #if INCLUDE_RTM_OPT
1128 if (!failing() && (rtm_state != NoRTM) &&
1129 (method()->method_data() != nullptr) &&
1130 (method()->method_data()->rtm_state() != rtm_state)) {
1131 // Preemptive decompile if rtm state was changed.
1132 record_failure("RTM state change invalidated rtm code");
1133 }
1134 #endif
1135
1136 if (failing()) {
1137 // While not a true deoptimization, it is a preemptive decompile.
1138 MethodData* mdo = method()->method_data();
1139 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1140 mdo->inc_decompile_count();
1141 }
1142
1143 // All buffers in the CodeBuffer are allocated in the CodeCache.
1144 // If the code buffer is created on each compile attempt
1145 // as in C2, then it must be freed.
1146 code_buffer->free_blob();
1147 return;
1148 }
1149
1150 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1151 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1152
1153 nm = nmethod::new_nmethod(method,
1154 compile_id(),
1155 entry_bci,
1156 offsets,
1157 orig_pc_offset,
1158 debug_info(), dependencies(), code_buffer,
1159 frame_words, oop_map_set,
1160 handler_table, inc_table,
1161 compiler, CompLevel(task()->comp_level()));
1162
1163 // Free codeBlobs
1164 code_buffer->free_blob();
1165
1166 if (nm != nullptr) {
1167 nm->set_has_unsafe_access(has_unsafe_access);
1168 nm->set_has_wide_vectors(has_wide_vectors);
1169 nm->set_has_monitors(has_monitors);
1170 assert(!method->is_synchronized() || nm->has_monitors(), "");
1171 #if INCLUDE_RTM_OPT
1172 nm->set_rtm_state(rtm_state);
1173 #endif
1174
1175 if (entry_bci == InvocationEntryBci) {
1176 if (TieredCompilation) {
1177 // If there is an old version we're done with it
1178 CompiledMethod* old = method->code();
1179 if (TraceMethodReplacement && old != nullptr) {
1180 ResourceMark rm;
1181 char *method_name = method->name_and_sig_as_C_string();
1182 tty->print_cr("Replacing method %s", method_name);
1183 }
1184 if (old != nullptr) {
1185 old->make_not_used();
1186 }
1187 }
1188
1189 LogTarget(Info, nmethod, install) lt;
1190 if (lt.is_enabled()) {
1191 ResourceMark rm;
1192 char *method_name = method->name_and_sig_as_C_string();
1193 lt.print("Installing method (%d) %s ",
1194 task()->comp_level(), method_name);
1195 }
1196 // Allow the code to be executed
1197 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1198 if (nm->make_in_use()) {
1199 method->set_code(method, nm);
1200 }
1201 } else {
1202 LogTarget(Info, nmethod, install) lt;
1203 if (lt.is_enabled()) {
1204 ResourceMark rm;
1205 char *method_name = method->name_and_sig_as_C_string();
1206 lt.print("Installing osr method (%d) %s @ %d",
1207 task()->comp_level(), method_name, entry_bci);
1208 }
1209 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1210 if (nm->make_in_use()) {
1211 method->method_holder()->add_osr_nmethod(nm);
1212 }
1213 }
1214 }
1215 }
1216
1217 NoSafepointVerifier nsv;
1218 if (nm != nullptr) {
1219 // Compilation succeeded, post what we know about it
1220 nm->post_compiled_method(task());
1221 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1222 } else {
1223 // The CodeCache is full.
1224 record_failure("code cache is full");
1225 }
1226
1227 // safepoints are allowed again
1228 }
1229
1230 // ------------------------------------------------------------------
1231 // ciEnv::find_system_klass
1232 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1233 VM_ENTRY_MARK;
1234 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1235 }
1236
1237 // ------------------------------------------------------------------
1238 // ciEnv::comp_level
1239 int ciEnv::comp_level() {
1240 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1241 return task()->comp_level();
1242 }
1243
1244 // ------------------------------------------------------------------
1245 // ciEnv::compile_id
1246 int ciEnv::compile_id() {
1247 if (task() == nullptr) return 0;
1248 return task()->compile_id();
1249 }
1250
1251 // ------------------------------------------------------------------
1252 // ciEnv::notice_inlined_method()
1253 void ciEnv::notice_inlined_method(ciMethod* method) {
1254 _num_inlined_bytecodes += method->code_size_for_inlining();
1255 }
1256
1257 // ------------------------------------------------------------------
1258 // ciEnv::num_inlined_bytecodes()
1259 int ciEnv::num_inlined_bytecodes() const {
1260 return _num_inlined_bytecodes;
1261 }
1262
1263 // ------------------------------------------------------------------
1264 // ciEnv::record_failure()
1265 void ciEnv::record_failure(const char* reason) {
1266 if (_failure_reason == nullptr) {
1267 // Record the first failure reason.
1268 _failure_reason = reason;
1269 }
1270 }
1271
1272 void ciEnv::report_failure(const char* reason) {
1273 EventCompilationFailure event;
1274 if (event.should_commit()) {
1275 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1276 }
1277 }
1278
1279 // ------------------------------------------------------------------
1280 // ciEnv::record_method_not_compilable()
1281 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1282 int new_compilable =
1283 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1284
1285 // Only note transitions to a worse state
1286 if (new_compilable > _compilable) {
1287 if (log() != nullptr) {
1288 if (all_tiers) {
1289 log()->elem("method_not_compilable");
1290 } else {
1291 log()->elem("method_not_compilable_at_tier level='%d'",
1292 current()->task()->comp_level());
1293 }
1294 }
1295 _compilable = new_compilable;
1296
1297 // Reset failure reason; this one is more important.
1298 _failure_reason = nullptr;
1299 record_failure(reason);
1300 }
1301 }
1302
1303 // ------------------------------------------------------------------
1304 // ciEnv::record_out_of_memory_failure()
1305 void ciEnv::record_out_of_memory_failure() {
1306 // If memory is low, we stop compiling methods.
1307 record_method_not_compilable("out of memory");
1308 }
1309
1310 ciInstance* ciEnv::unloaded_ciinstance() {
1311 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1312 }
1313
1314 // ------------------------------------------------------------------
1315 // Replay support
1316
1317
1318 // Lookup location descriptor for the class, if any.
1319 // Returns false if not found.
1320 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1321 bool found = false;
1322 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1323 if (!found) {
1324 return false;
1325 }
1326 loc = _dyno_locs->at(pos);
1327 return found;
1328 }
1329
1330 // Associate the current location descriptor with the given class and record for later lookup.
1331 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1332 const char *loc = os::strdup(_dyno_name);
1333 bool found = false;
1334 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1335 if (found) {
1336 _dyno_locs->at_put(pos, loc);
1337 } else {
1338 _dyno_klasses->insert_before(pos, ik);
1339 _dyno_locs->insert_before(pos, loc);
1340 }
1341 }
1342
1343 // Associate the current location descriptor with the given class and record for later lookup.
1344 // If it turns out that there are multiple locations for the given class, that conflict should
1345 // be handled here. Currently we choose the first location found.
1346 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1347 if (!ik->is_hidden()) {
1348 return;
1349 }
1350 const char *loc0;
1351 if (dyno_loc(ik, loc0)) {
1352 // TODO: found multiple references, see if we can improve
1353 if (Verbose) {
1354 tty->print_cr("existing call site @ %s for %s",
1355 loc0, ik->external_name());
1356 }
1357 } else {
1358 set_dyno_loc(ik);
1359 }
1360 }
1361
1362 // Look up the location descriptor for the given class and print it to the output stream.
1363 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1364 const char *loc;
1365 if (dyno_loc(ik, loc)) {
1366 out->print("%s", loc);
1367 return true;
1368 } else {
1369 return false;
1370 }
1371 }
1372
1373 // Look up the location descriptor for the given class and return it as a string.
1374 // Returns null if no location is found.
1375 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1376 if (ik->is_hidden()) {
1377 stringStream ss;
1378 if (print_dyno_loc(&ss, ik)) {
1379 ss.print(" ;"); // add terminator
1380 const char* call_site = ss.as_string();
1381 return call_site;
1382 }
1383 }
1384 return nullptr;
1385 }
1386
1387 // Look up the location descriptor for the given class and return it as a string.
1388 // Returns the class name as a fallback if no location is found.
1389 const char *ciEnv::replay_name(ciKlass* k) const {
1390 if (k->is_instance_klass()) {
1391 return replay_name(k->as_instance_klass()->get_instanceKlass());
1392 }
1393 return k->name()->as_quoted_ascii();
1394 }
1395
1396 // Look up the location descriptor for the given class and return it as a string.
1397 // Returns the class name as a fallback if no location is found.
1398 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1399 const char* name = dyno_name(ik);
1400 if (name != nullptr) {
1401 return name;
1402 }
1403 return ik->name()->as_quoted_ascii();
1404 }
1405
1406 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1407 void ciEnv::record_member(Thread* thread, oop member) {
1408 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1409 // Check MemberName.clazz field
1410 oop clazz = java_lang_invoke_MemberName::clazz(member);
1411 if (clazz->klass()->is_instance_klass()) {
1412 RecordLocation fp(this, "clazz");
1413 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1414 record_best_dyno_loc(ik);
1415 }
1416 // Check MemberName.method.vmtarget field
1417 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1418 if (vmtarget != nullptr) {
1419 RecordLocation fp2(this, "<vmtarget>");
1420 InstanceKlass* ik = vmtarget->method_holder();
1421 record_best_dyno_loc(ik);
1422 }
1423 }
1424
1425 // Read an object field. Lookup is done by name only.
1426 static inline oop obj_field(oop obj, const char* name) {
1427 return ciReplay::obj_field(obj, name);
1428 }
1429
1430 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1431 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1432 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1433
1434 {
1435 // Check LambdaForm.vmentry field
1436 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1437 RecordLocation fp0(this, "vmentry");
1438 record_member(thread, member);
1439 }
1440
1441 // Check LambdaForm.names array
1442 objArrayOop names = (objArrayOop)obj_field(form, "names");
1443 if (names != nullptr) {
1444 RecordLocation lp0(this, "names");
1445 int len = names->length();
1446 for (int i = 0; i < len; ++i) {
1447 oop name = names->obj_at(i);
1448 RecordLocation lp1(this, "%d", i);
1449 // Check LambdaForm.names[i].function field
1450 RecordLocation lp2(this, "function");
1451 oop function = obj_field(name, "function");
1452 if (function != nullptr) {
1453 // Check LambdaForm.names[i].function.member field
1454 oop member = obj_field(function, "member");
1455 if (member != nullptr) {
1456 RecordLocation lp3(this, "member");
1457 record_member(thread, member);
1458 }
1459 // Check LambdaForm.names[i].function.resolvedHandle field
1460 oop mh = obj_field(function, "resolvedHandle");
1461 if (mh != nullptr) {
1462 RecordLocation lp3(this, "resolvedHandle");
1463 record_mh(thread, mh);
1464 }
1465 // Check LambdaForm.names[i].function.invoker field
1466 oop invoker = obj_field(function, "invoker");
1467 if (invoker != nullptr) {
1468 RecordLocation lp3(this, "invoker");
1469 record_mh(thread, invoker);
1470 }
1471 }
1472 }
1473 }
1474 }
1475
1476 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1477 void ciEnv::record_mh(Thread* thread, oop mh) {
1478 {
1479 // Check MethodHandle.form field
1480 oop form = java_lang_invoke_MethodHandle::form(mh);
1481 RecordLocation fp(this, "form");
1482 record_lambdaform(thread, form);
1483 }
1484 // Check DirectMethodHandle.member field
1485 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1486 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1487 RecordLocation fp(this, "member");
1488 record_member(thread, member);
1489 } else {
1490 // Check <MethodHandle subclass>.argL<n> fields
1491 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1492 char arg_name[] = "argLXX";
1493 int max_arg = 99;
1494 for (int index = 0; index <= max_arg; ++index) {
1495 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1496 oop arg = obj_field(mh, arg_name);
1497 if (arg != nullptr) {
1498 RecordLocation fp(this, "%s", arg_name);
1499 if (arg->klass()->is_instance_klass()) {
1500 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1501 record_best_dyno_loc(ik2);
1502 record_call_site_obj(thread, arg);
1503 }
1504 } else {
1505 break;
1506 }
1507 }
1508 }
1509 }
1510
1511 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1512 // Types currently supported are MethodHandle and CallSite.
1513 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1514 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1515 {
1516 if (obj != nullptr) {
1517 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1518 record_mh(thread, obj);
1519 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1520 oop target = java_lang_invoke_CallSite::target(obj);
1521 if (target->klass()->is_instance_klass()) {
1522 RecordLocation fp(this, "target");
1523 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1524 record_best_dyno_loc(ik);
1525 }
1526 }
1527 }
1528 }
1529
1530 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1531 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1532 InstanceKlass* holder = adapter->method_holder();
1533 if (!holder->is_hidden()) {
1534 return;
1535 }
1536 RecordLocation fp(this, "<adapter>");
1537 record_best_dyno_loc(holder);
1538 }
1539
1540 // Process an invokedynamic call site and record any dynamic locations.
1541 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1542 int index = cp->decode_invokedynamic_index(indy_index);
1543 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(index);
1544 if (indy_info->method() != nullptr) {
1545 // process the adapter
1546 Method* adapter = indy_info->method();
1547 record_call_site_method(thread, adapter);
1548 // process the appendix
1549 oop appendix = cp->resolved_reference_from_indy(index);
1550 {
1551 RecordLocation fp(this, "<appendix>");
1552 record_call_site_obj(thread, appendix);
1553 }
1554 // process the BSM
1555 int pool_index = indy_info->constant_pool_index();
1556 BootstrapInfo bootstrap_specifier(cp, pool_index, index);
1557 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1558 {
1559 RecordLocation fp(this, "<bsm>");
1560 record_call_site_obj(thread, bsm);
1561 }
1562 }
1563 }
1564
1565 // Process an invokehandle call site and record any dynamic locations.
1566 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1567 const int holder_index = cp->klass_ref_index_at(index);
1568 if (!cp->tag_at(holder_index).is_klass()) {
1569 return; // not resolved
1570 }
1571 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1572 Symbol* name = cp->name_ref_at(index);
1573 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1574 ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
1575 if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) {
1576 // process the adapter
1577 Method* adapter = cp_cache_entry->f1_as_method();
1578 oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1579 record_call_site_method(thread, adapter);
1580 // process the appendix
1581 {
1582 RecordLocation fp(this, "<appendix>");
1583 record_call_site_obj(thread, appendix);
1584 }
1585 }
1586 }
1587 }
1588
1589 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1590 // constant pool entries and record for future lookup.
1591 void ciEnv::find_dynamic_call_sites() {
1592 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1593 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1594
1595 // Iterate over the class hierarchy
1596 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1597 Klass* sub = iter.klass();
1598 if (sub->is_instance_klass()) {
1599 InstanceKlass *isub = InstanceKlass::cast(sub);
1600 InstanceKlass* ik = isub;
1601 if (!ik->is_linked()) {
1602 continue;
1603 }
1604 if (ik->is_hidden()) {
1605 continue;
1606 }
1607 JavaThread* thread = JavaThread::current();
1608 const constantPoolHandle pool(thread, ik->constants());
1609
1610 // Look for invokedynamic/invokehandle call sites
1611 for (int i = 0; i < ik->methods()->length(); ++i) {
1612 Method* m = ik->methods()->at(i);
1613
1614 BytecodeStream bcs(methodHandle(thread, m));
1615 while (!bcs.is_last_bytecode()) {
1616 Bytecodes::Code opcode = bcs.next();
1617 opcode = bcs.raw_code();
1618 switch (opcode) {
1619 case Bytecodes::_invokedynamic:
1620 case Bytecodes::_invokehandle: {
1621 RecordLocation fp(this, "@bci %s %s %s %d",
1622 ik->name()->as_quoted_ascii(),
1623 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1624 bcs.bci());
1625 if (opcode == Bytecodes::_invokedynamic) {
1626 int index = bcs.get_index_u4();
1627 process_invokedynamic(pool, index, thread);
1628 } else {
1629 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1630 int cp_cache_index = bcs.get_index_u2_cpcache();
1631 process_invokehandle(pool, cp_cache_index, thread);
1632 }
1633 break;
1634 }
1635 default:
1636 break;
1637 }
1638 }
1639 }
1640
1641 // Look for MethodHandle constant pool entries
1642 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1643 int len = pool->length();
1644 for (int i = 0; i < len; ++i) {
1645 if (pool->tag_at(i).is_method_handle()) {
1646 bool found_it;
1647 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1648 if (mh != nullptr) {
1649 RecordLocation fp(this, "%d", i);
1650 record_mh(thread, mh);
1651 }
1652 }
1653 }
1654 }
1655 }
1656 }
1657
1658 void ciEnv::dump_compile_data(outputStream* out) {
1659 CompileTask* task = this->task();
1660 if (task) {
1661 #ifdef COMPILER2
1662 if (ReplayReduce && compiler_data() != nullptr) {
1663 // Dump C2 "reduced" inlining data.
1664 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1665 }
1666 #endif
1667 Method* method = task->method();
1668 int entry_bci = task->osr_bci();
1669 int comp_level = task->comp_level();
1670 out->print("compile ");
1671 get_method(method)->dump_name_as_ascii(out);
1672 out->print(" %d %d", entry_bci, comp_level);
1673 if (compiler_data() != nullptr) {
1674 if (is_c2_compile(comp_level)) {
1675 #ifdef COMPILER2
1676 // Dump C2 inlining data.
1677 ((Compile*)compiler_data())->dump_inline_data(out);
1678 #endif
1679 } else if (is_c1_compile(comp_level)) {
1680 #ifdef COMPILER1
1681 // Dump C1 inlining data.
1682 ((Compilation*)compiler_data())->dump_inline_data(out);
1683 #endif
1684 }
1685 }
1686 out->cr();
1687 }
1688 }
1689
1690 // Called from VM error reporter, so be careful.
1691 // Don't safepoint or acquire any locks.
1692 //
1693 void ciEnv::dump_replay_data_helper(outputStream* out) {
1694 NoSafepointVerifier no_safepoint;
1695 ResourceMark rm;
1696
1697 out->print_cr("version %d", REPLAY_VERSION);
1698 #if INCLUDE_JVMTI
1699 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1700 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1701 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1702 #endif // INCLUDE_JVMTI
1703
1704 find_dynamic_call_sites();
1705
1706 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1707 out->print_cr("# %d ciObject found", objects->length());
1708
1709 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1710 // protection domain to load subsequent classes during replay compilation.
1711 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1712
1713 for (int i = 0; i < objects->length(); i++) {
1714 objects->at(i)->dump_replay_data(out);
1715 }
1716 dump_compile_data(out);
1717 out->flush();
1718 }
1719
1720 // Called from VM error reporter, so be careful.
1721 // Don't safepoint or acquire any locks.
1722 //
1723 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1724 GUARDED_VM_ENTRY(
1725 dump_replay_data_helper(out);
1726 )
1727 }
1728
1729 void ciEnv::dump_replay_data(outputStream* out) {
1730 GUARDED_VM_ENTRY(
1731 MutexLocker ml(Compile_lock);
1732 dump_replay_data_helper(out);
1733 )
1734 }
1735
1736 void ciEnv::dump_replay_data(int compile_id) {
1737 char buffer[64];
1738 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1739 if (ret > 0) {
1740 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1741 if (fd != -1) {
1742 FILE* replay_data_file = os::fdopen(fd, "w");
1743 if (replay_data_file != nullptr) {
1744 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1745 dump_replay_data(&replay_data_stream);
1746 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1747 } else {
1748 tty->print_cr("# Can't open file to dump replay data.");
1749 }
1750 }
1751 }
1752 }
1753
1754 void ciEnv::dump_inline_data(int compile_id) {
1755 char buffer[64];
1756 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1757 if (ret > 0) {
1758 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1759 if (fd != -1) {
1760 FILE* inline_data_file = os::fdopen(fd, "w");
1761 if (inline_data_file != nullptr) {
1762 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1763 GUARDED_VM_ENTRY(
1764 MutexLocker ml(Compile_lock);
1765 dump_compile_data(&replay_data_stream);
1766 )
1767 replay_data_stream.flush();
1768 tty->print("# Compiler inline data is saved as: ");
1769 tty->print_cr("%s", buffer);
1770 } else {
1771 tty->print_cr("# Can't open file to dump inline data.");
1772 }
1773 }
1774 }
1775 }