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/resolvedIndyEntry.hpp"
69 #include "oops/symbolHandle.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/methodHandles.hpp"
72 #include "runtime/fieldDescriptor.inline.hpp"
73 #include "runtime/handles.inline.hpp"
74 #include "runtime/init.hpp"
75 #include "runtime/javaThread.hpp"
76 #include "runtime/jniHandles.inline.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/safepointVerifiers.hpp"
79 #include "runtime/sharedRuntime.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/macros.hpp"
82 #ifdef COMPILER1
83 #include "c1/c1_Runtime1.hpp"
84 #endif
85 #ifdef COMPILER2
86 #include "opto/runtime.hpp"
87 #endif
88
89 // ciEnv
90 //
91 // This class is the top level broker for requests from the compiler
92 // to the VM.
93
94 ciObject* ciEnv::_null_object_instance;
95
96 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = nullptr;
97 VM_CLASSES_DO(VM_CLASS_DEFN)
98 #undef VM_CLASS_DEFN
99
100 ciSymbol* ciEnv::_unloaded_cisymbol = nullptr;
101 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = nullptr;
102 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = nullptr;
103
104 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = nullptr;
105 jobject ciEnv::_ArrayStoreException_handle = nullptr;
106 jobject ciEnv::_ClassCastException_handle = nullptr;
107
108 #ifndef PRODUCT
109 static bool firstEnv = true;
110 #endif /* PRODUCT */
111
112 // ------------------------------------------------------------------
113 // ciEnv::ciEnv
114 ciEnv::ciEnv(CompileTask* task)
115 : _ciEnv_arena(mtCompiler) {
116 VM_ENTRY_MARK;
117
118 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
119 thread->set_env(this);
120 assert(ciEnv::current() == this, "sanity");
121
122 _oop_recorder = nullptr;
123 _debug_info = nullptr;
124 _dependencies = nullptr;
125 _failure_reason = nullptr;
126 _inc_decompile_count_on_failure = true;
127 _compilable = MethodCompilable;
128 _break_at_compile = false;
129 _compiler_data = nullptr;
130 #ifndef PRODUCT
131 assert(!firstEnv, "not initialized properly");
132 #endif /* !PRODUCT */
133
134 _num_inlined_bytecodes = 0;
135 assert(task == nullptr || thread->task() == task, "sanity");
136 if (task != nullptr) {
137 task->mark_started(os::elapsed_counter());
138 }
139 _task = task;
140 _log = nullptr;
141
142 // Temporary buffer for creating symbols and such.
143 _name_buffer = nullptr;
144 _name_buffer_len = 0;
145
146 _arena = &_ciEnv_arena;
147 _factory = new (_arena) ciObjectFactory(_arena, 128);
148
149 // Preload commonly referenced system ciObjects.
150
151 // During VM initialization, these instances have not yet been created.
152 // Assertions ensure that these instances are not accessed before
153 // their initialization.
154
155 assert(Universe::is_fully_initialized(), "should be complete");
156
157 oop o = Universe::null_ptr_exception_instance();
158 assert(o != nullptr, "should have been initialized");
159 _NullPointerException_instance = get_object(o)->as_instance();
160 o = Universe::arithmetic_exception_instance();
161 assert(o != nullptr, "should have been initialized");
162 _ArithmeticException_instance = get_object(o)->as_instance();
163
164 _ArrayIndexOutOfBoundsException_instance = nullptr;
165 _ArrayStoreException_instance = nullptr;
166 _ClassCastException_instance = nullptr;
167 _the_null_string = nullptr;
168 _the_min_jint_string = nullptr;
169
170 _jvmti_redefinition_count = 0;
171 _jvmti_can_hotswap_or_post_breakpoint = false;
172 _jvmti_can_access_local_variables = false;
173 _jvmti_can_post_on_exceptions = false;
174 _jvmti_can_pop_frame = false;
175
176 _dyno_klasses = nullptr;
177 _dyno_locs = nullptr;
178 _dyno_name[0] = '\0';
179 }
180
181 // Record components of a location descriptor string. Components are appended by the constructor and
182 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
183 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
184 //
185 // Example use:
186 //
187 // {
188 // RecordLocation fp(this, "field1");
189 // // location: "field1"
190 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
191 // // location: "field1"
192 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
193 // // location: "field1"
194 // }
195 // // location: ""
196 //
197 // Examples of actual locations
198 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
199 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
200 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
201 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
202 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
203 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
204 class RecordLocation {
205 private:
206 char* end;
207
208 ATTRIBUTE_PRINTF(3, 4)
209 void push(ciEnv* ci, const char* fmt, ...) {
210 va_list args;
211 va_start(args, fmt);
212 push_va(ci, fmt, args);
213 va_end(args);
214 }
215
216 public:
217 ATTRIBUTE_PRINTF(3, 0)
218 void push_va(ciEnv* ci, const char* fmt, va_list args) {
219 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
220 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
221 os::vsnprintf(e, m - e, fmt, args);
222 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
223 }
224
225 // append a new component
226 ATTRIBUTE_PRINTF(3, 4)
227 RecordLocation(ciEnv* ci, const char* fmt, ...) {
228 end = ci->_dyno_name + strlen(ci->_dyno_name);
229 va_list args;
230 va_start(args, fmt);
231 push(ci, " ");
232 push_va(ci, fmt, args);
233 va_end(args);
234 }
235
236 // reset to previous state
237 ~RecordLocation() {
238 *end = '\0';
239 }
240 };
241
242 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
243 ASSERT_IN_VM;
244
245 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
246 CompilerThread* current_thread = CompilerThread::current();
247 assert(current_thread->env() == nullptr, "must be");
248 current_thread->set_env(this);
249 assert(ciEnv::current() == this, "sanity");
250
251 _oop_recorder = nullptr;
252 _debug_info = nullptr;
253 _dependencies = nullptr;
254 _failure_reason = 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 // ------------------------------------------------------------------
370 // helper for lazy exception creation
371 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
372 VM_ENTRY_MARK;
373 if (handle == nullptr) {
374 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
375 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
376 jobject objh = nullptr;
377 if (ik != nullptr) {
378 oop obj = ik->allocate_instance(THREAD);
379 if (!HAS_PENDING_EXCEPTION)
380 objh = JNIHandles::make_global(Handle(THREAD, obj));
381 }
382 if (HAS_PENDING_EXCEPTION) {
383 CLEAR_PENDING_EXCEPTION;
384 } else {
385 handle = objh;
386 }
387 }
388 oop obj = JNIHandles::resolve(handle);
389 return obj == nullptr? nullptr: get_object(obj)->as_instance();
390 }
391
392 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
393 switch (type) {
394 case T_BOOLEAN: return Boolean_klass();
395 case T_BYTE : return Byte_klass();
396 case T_CHAR : return Character_klass();
397 case T_SHORT : return Short_klass();
398 case T_INT : return Integer_klass();
399 case T_LONG : return Long_klass();
400 case T_FLOAT : return Float_klass();
401 case T_DOUBLE : return Double_klass();
402
403 default:
404 assert(false, "not a primitive: %s", type2name(type));
405 return nullptr;
406 }
407 }
408
409 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
410 if (_ArrayIndexOutOfBoundsException_instance == nullptr) {
411 _ArrayIndexOutOfBoundsException_instance
412 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
413 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
414 }
415 return _ArrayIndexOutOfBoundsException_instance;
416 }
417 ciInstance* ciEnv::ArrayStoreException_instance() {
418 if (_ArrayStoreException_instance == nullptr) {
419 _ArrayStoreException_instance
420 = get_or_create_exception(_ArrayStoreException_handle,
421 vmSymbols::java_lang_ArrayStoreException());
422 }
423 return _ArrayStoreException_instance;
424 }
425 ciInstance* ciEnv::ClassCastException_instance() {
426 if (_ClassCastException_instance == nullptr) {
427 _ClassCastException_instance
428 = get_or_create_exception(_ClassCastException_handle,
429 vmSymbols::java_lang_ClassCastException());
430 }
431 return _ClassCastException_instance;
432 }
433
434 ciInstance* ciEnv::the_null_string() {
435 if (_the_null_string == nullptr) {
436 VM_ENTRY_MARK;
437 _the_null_string = get_object(Universe::the_null_string())->as_instance();
438 }
439 return _the_null_string;
440 }
441
442 ciInstance* ciEnv::the_min_jint_string() {
443 if (_the_min_jint_string == nullptr) {
444 VM_ENTRY_MARK;
445 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
446 }
447 return _the_min_jint_string;
448 }
449
450 // ------------------------------------------------------------------
451 // ciEnv::get_method_from_handle
452 ciMethod* ciEnv::get_method_from_handle(Method* method) {
453 VM_ENTRY_MARK;
454 return get_metadata(method)->as_method();
455 }
456
457 // ------------------------------------------------------------------
458 // ciEnv::check_klass_accessiblity
459 //
460 // Note: the logic of this method should mirror the logic of
461 // ConstantPool::verify_constant_pool_resolve.
462 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
463 Klass* resolved_klass) {
464 if (accessing_klass == nullptr || !accessing_klass->is_loaded()) {
465 return true;
466 }
467 if (accessing_klass->is_obj_array_klass()) {
468 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
469 }
470 if (!accessing_klass->is_instance_klass()) {
471 return true;
472 }
473
474 if (resolved_klass->is_objArray_klass()) {
475 // Find the element klass, if this is an array.
476 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
477 }
478 if (resolved_klass->is_instance_klass()) {
479 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
480 InstanceKlass::cast(resolved_klass),
481 true) == Reflection::ACCESS_OK);
482 }
483 return true;
484 }
485
486 // ------------------------------------------------------------------
487 // ciEnv::get_klass_by_name_impl
488 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
489 const constantPoolHandle& cpool,
490 ciSymbol* name,
491 bool require_local) {
492 ASSERT_IN_VM;
493 Thread* current = Thread::current();
494
495 // Now we need to check the SystemDictionary
496 Symbol* sym = name->get_symbol();
497 if (Signature::has_envelope(sym)) {
498 // This is a name from a signature. Strip off the trimmings.
499 // Call recursive to keep scope of strippedsym.
500 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
501 ciSymbol* strippedname = get_symbol(strippedsym);
502 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
503 }
504
505 // Check for prior unloaded klass. The SystemDictionary's answers
506 // can vary over time but the compiler needs consistency.
507 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
508 if (unloaded_klass != nullptr) {
509 if (require_local) return nullptr;
510 return unloaded_klass;
511 }
512
513 Handle loader;
514 Handle domain;
515 if (accessing_klass != nullptr) {
516 loader = Handle(current, accessing_klass->loader());
517 domain = Handle(current, accessing_klass->protection_domain());
518 }
519
520 Klass* found_klass = require_local ?
521 SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain) :
522 SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
523
524 // If we fail to find an array klass, look again for its element type.
525 // The element type may be available either locally or via constraints.
526 // In either case, if we can find the element type in the system dictionary,
527 // we must build an array type around it. The CI requires array klasses
528 // to be loaded if their element klasses are loaded, except when memory
529 // is exhausted.
530 if (Signature::is_array(sym) &&
531 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
532 sym->char_at(1) == JVM_SIGNATURE_CLASS ||
533 sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT )) {
534 // We have an unloaded array.
535 // Build it on the fly if the element class exists.
536 SignatureStream ss(sym, false);
537 ss.skip_array_prefix(1);
538 // Get element ciKlass recursively.
539 ciKlass* elem_klass =
540 get_klass_by_name_impl(accessing_klass,
541 cpool,
542 get_symbol(ss.as_symbol()),
543 require_local);
544 if (elem_klass != nullptr && elem_klass->is_loaded()) {
545 // Now make an array for it
546 bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT;
547 return ciArrayKlass::make(elem_klass, null_free_array);
548 }
549 }
550
551 if (found_klass == nullptr && !cpool.is_null() && cpool->has_preresolution()) {
552 // Look inside the constant pool for pre-resolved class entries.
553 for (int i = cpool->length() - 1; i >= 1; i--) {
554 if (cpool->tag_at(i).is_klass()) {
555 Klass* kls = cpool->resolved_klass_at(i);
556 if (kls->name() == sym) {
557 found_klass = kls;
558 break;
559 }
560 }
561 }
562 }
563
564 if (found_klass != nullptr) {
565 // Found it. Build a CI handle.
566 return get_klass(found_klass);
567 }
568
569 if (require_local) return nullptr;
570
571 // Not yet loaded into the VM, or not governed by loader constraints.
572 // Make a CI representative for it.
573 int i = 0;
574 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
575 i++;
576 }
577 if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
578 // An unloaded array class of inline types is an ObjArrayKlass, an
579 // unloaded inline type class is an InstanceKlass. For consistency,
580 // make the signature of the unloaded array of inline type use L
581 // rather than Q.
582 char* new_name = name_buffer(sym->utf8_length()+1);
583 strncpy(new_name, (char*)sym->base(), sym->utf8_length());
584 new_name[i] = JVM_SIGNATURE_CLASS;
585 new_name[sym->utf8_length()] = '\0';
586 return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name));
587 }
588 return get_unloaded_klass(accessing_klass, name);
589 }
590
591 // ------------------------------------------------------------------
592 // ciEnv::get_klass_by_name
593 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
594 ciSymbol* klass_name,
595 bool require_local) {
596 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
597 constantPoolHandle(),
598 klass_name,
599 require_local);)
600 }
601
602 // ------------------------------------------------------------------
603 // ciEnv::get_klass_by_index_impl
604 //
605 // Implementation of get_klass_by_index.
606 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
607 int index,
608 bool& is_accessible,
609 ciInstanceKlass* accessor) {
610 Klass* klass = nullptr;
611 Symbol* klass_name = nullptr;
612
613 if (cpool->tag_at(index).is_symbol()) {
614 klass_name = cpool->symbol_at(index);
615 } else {
616 // Check if it's resolved if it's not a symbol constant pool entry.
617 klass = ConstantPool::klass_at_if_loaded(cpool, index);
618 // Try to look it up by name.
619 if (klass == nullptr) {
620 klass_name = cpool->klass_name_at(index);
621 }
622 }
623
624 if (klass == nullptr) {
625 // Not found in constant pool. Use the name to do the lookup.
626 ciKlass* k = get_klass_by_name_impl(accessor,
627 cpool,
628 get_symbol(klass_name),
629 false);
630 // Calculate accessibility the hard way.
631 if (!k->is_loaded()) {
632 is_accessible = false;
633 } else if (k->loader() != accessor->loader() &&
634 get_klass_by_name_impl(accessor, cpool, k->name(), true) == nullptr) {
635 // Loaded only remotely. Not linked yet.
636 is_accessible = false;
637 } else {
638 // Linked locally, and we must also check public/private, etc.
639 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
640 }
641 return k;
642 }
643
644 // Check for prior unloaded klass. The SystemDictionary's answers
645 // can vary over time but the compiler needs consistency.
646 ciSymbol* name = get_symbol(klass->name());
647 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
648 if (unloaded_klass != nullptr) {
649 is_accessible = false;
650 return unloaded_klass;
651 }
652
653 // It is known to be accessible, since it was found in the constant pool.
654 ciKlass* ciKlass = get_klass(klass);
655 is_accessible = true;
656 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
657 // Klass was unresolved at replay dump time and therefore not accessible.
658 is_accessible = false;
659 }
660 return ciKlass;
661 }
662
663 // ------------------------------------------------------------------
664 // ciEnv::get_klass_by_index
665 //
666 // Get a klass from the constant pool.
667 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
668 int index,
669 bool& is_accessible,
670 ciInstanceKlass* accessor) {
671 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
672 }
673
674 // ------------------------------------------------------------------
675 // ciEnv::is_inline_klass
676 //
677 // Check if the klass is an inline klass.
678 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) {
679 GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();)
680 }
681
682 // ------------------------------------------------------------------
683 // ciEnv::unbox_primitive_value
684 //
685 // Unbox a primitive and return it as a ciConstant.
686 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
687 jvalue value;
688 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
689 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
690 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
691 return ciConstant();
692 }
693 switch (bt) {
694 case T_BOOLEAN: return ciConstant(bt, value.z);
695 case T_BYTE: return ciConstant(bt, value.b);
696 case T_SHORT: return ciConstant(bt, value.s);
697 case T_CHAR: return ciConstant(bt, value.c);
698 case T_INT: return ciConstant(bt, value.i);
699 case T_LONG: return ciConstant(value.j);
700 case T_FLOAT: return ciConstant(value.f);
701 case T_DOUBLE: return ciConstant(value.d);
702
703 default:
704 assert(false, "not a primitive type: %s", type2name(bt));
705 return ciConstant();
706 }
707 }
708
709 // ------------------------------------------------------------------
710 // ciEnv::get_resolved_constant
711 //
712 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
713 assert(obj_index >= 0, "");
714 oop obj = cpool->resolved_reference_at(obj_index);
715 if (obj == nullptr) {
716 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
717 // Null constant is represented as a sentinel (non-null) value.
718 return ciConstant();
719 } else if (obj == Universe::the_null_sentinel()) {
720 return ciConstant(T_OBJECT, get_object(nullptr));
721 } else {
722 ciObject* ciobj = get_object(obj);
723 if (ciobj->is_array()) {
724 return ciConstant(T_ARRAY, ciobj);
725 } else {
726 int cp_index = cpool->object_to_cp_index(obj_index);
727 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
728 if (is_java_primitive(bt)) {
729 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
730 return unbox_primitive_value(ciobj, bt);
731 } else {
732 assert(ciobj->is_instance(), "should be an instance");
733 return ciConstant(T_OBJECT, ciobj);
734 }
735 }
736 }
737 }
738
739 // ------------------------------------------------------------------
740 // ciEnv::get_constant_by_index_impl
741 //
742 // Implementation of get_constant_by_index().
743 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
744 int index, int obj_index,
745 ciInstanceKlass* accessor) {
746 if (obj_index >= 0) {
747 ciConstant con = get_resolved_constant(cpool, obj_index);
748 if (con.is_valid()) {
749 return con;
750 }
751 }
752 constantTag tag = cpool->tag_at(index);
753 if (tag.is_int()) {
754 return ciConstant(T_INT, (jint)cpool->int_at(index));
755 } else if (tag.is_long()) {
756 return ciConstant((jlong)cpool->long_at(index));
757 } else if (tag.is_float()) {
758 return ciConstant((jfloat)cpool->float_at(index));
759 } else if (tag.is_double()) {
760 return ciConstant((jdouble)cpool->double_at(index));
761 } else if (tag.is_string()) {
762 EXCEPTION_CONTEXT;
763 assert(obj_index >= 0, "should have an object index");
764 oop string = cpool->string_at(index, obj_index, THREAD);
765 if (HAS_PENDING_EXCEPTION) {
766 CLEAR_PENDING_EXCEPTION;
767 record_out_of_memory_failure();
768 return ciConstant();
769 }
770 ciInstance* constant = get_object(string)->as_instance();
771 return ciConstant(T_OBJECT, constant);
772 } else if (tag.is_unresolved_klass_in_error()) {
773 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(nullptr));
774 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
775 bool will_link;
776 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
777 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
778 if (klass->is_loaded() && tag.is_Qdescriptor_klass()) {
779 return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror());
780 } else {
781 return ciConstant(T_OBJECT, mirror);
782 }
783 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
784 // must execute Java code to link this CP entry into cache[i].f1
785 assert(obj_index >= 0, "should have an object index");
786 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
787 ciObject* ciobj = get_unloaded_method_type_constant(signature);
788 return ciConstant(T_OBJECT, ciobj);
789 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
790 // must execute Java code to link this CP entry into cache[i].f1
791 assert(obj_index >= 0, "should have an object index");
792 bool ignore_will_link;
793 int ref_kind = cpool->method_handle_ref_kind_at(index);
794 int callee_index = cpool->method_handle_klass_index_at(index);
795 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
796 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
797 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
798 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
799 return ciConstant(T_OBJECT, ciobj);
800 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
801 assert(obj_index >= 0, "should have an object index");
802 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
803 } else {
804 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
805 return ciConstant();
806 }
807 }
808
809 // ------------------------------------------------------------------
810 // ciEnv::get_constant_by_index
811 //
812 // Pull a constant out of the constant pool. How appropriate.
813 //
814 // Implementation note: this query is currently in no way cached.
815 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
816 int pool_index, int cache_index,
817 ciInstanceKlass* accessor) {
818 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
819 }
820
821 // ------------------------------------------------------------------
822 // ciEnv::get_field_by_index_impl
823 //
824 // Implementation of get_field_by_index.
825 //
826 // Implementation note: the results of field lookups are cached
827 // in the accessor klass.
828 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
829 int index, Bytecodes::Code bc) {
830 ciConstantPoolCache* cache = accessor->field_cache();
831 if (cache == nullptr) {
832 ciField* field = new (arena()) ciField(accessor, index, bc);
833 return field;
834 } else {
835 ciField* field = (ciField*)cache->get(index);
836 if (field == nullptr) {
837 field = new (arena()) ciField(accessor, index, bc);
838 cache->insert(index, field);
839 }
840 return field;
841 }
842 }
843
844 // ------------------------------------------------------------------
845 // ciEnv::get_field_by_index
846 //
847 // Get a field by index from a klass's constant pool.
848 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
849 int index, Bytecodes::Code bc) {
850 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index, bc);)
851 }
852
853 // ------------------------------------------------------------------
854 // ciEnv::lookup_method
855 //
856 // Perform an appropriate method lookup based on accessor, holder,
857 // name, signature, and bytecode.
858 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
859 ciKlass* holder,
860 Symbol* name,
861 Symbol* sig,
862 Bytecodes::Code bc,
863 constantTag tag) {
864 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
865 Klass* holder_klass = holder->get_Klass();
866
867 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
868 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
869
870 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
871 LinkInfo::AccessCheck::required,
872 LinkInfo::LoaderConstraintCheck::required,
873 tag);
874 switch (bc) {
875 case Bytecodes::_invokestatic:
876 return LinkResolver::resolve_static_call_or_null(link_info);
877 case Bytecodes::_invokespecial:
878 return LinkResolver::resolve_special_call_or_null(link_info);
879 case Bytecodes::_invokeinterface:
880 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
881 case Bytecodes::_invokevirtual:
882 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
883 default:
884 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
885 return nullptr; // silence compiler warnings
886 }
887 }
888
889
890 // ------------------------------------------------------------------
891 // ciEnv::get_method_by_index_impl
892 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
893 int index, Bytecodes::Code bc,
894 ciInstanceKlass* accessor) {
895 assert(cpool.not_null(), "need constant pool");
896 assert(accessor != nullptr, "need origin of access");
897 if (bc == Bytecodes::_invokedynamic) {
898 // FIXME: code generation could allow for null (unlinked) call site
899 // The call site could be made patchable as follows:
900 // Load the appendix argument from the constant pool.
901 // Test the appendix argument and jump to a known deopt routine if it is null.
902 // Jump through a patchable call site, which is initially a deopt routine.
903 // Patch the call site to the nmethod entry point of the static compiled lambda form.
904 // As with other two-component call sites, both values must be independently verified.
905 int indy_index = cpool->decode_invokedynamic_index(index);
906 assert (indy_index >= 0, "should be");
907 assert(indy_index < cpool->cache()->resolved_indy_entries_length(), "impossible");
908 Method* adapter = cpool->resolved_indy_entry_at(indy_index)->method();
909 // Resolved if the adapter is non null.
910 if (adapter != nullptr) {
911 return get_method(adapter);
912 }
913
914 // Fake a method that is equivalent to a declared method.
915 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
916 ciSymbol* name = ciSymbols::invokeBasic_name();
917 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index, bc));
918 return get_unloaded_method(holder, name, signature, accessor);
919 } else {
920 const int holder_index = cpool->klass_ref_index_at(index, bc);
921 bool holder_is_accessible;
922 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
923
924 // Get the method's name and signature.
925 Symbol* name_sym = cpool->name_ref_at(index, bc);
926 Symbol* sig_sym = cpool->signature_ref_at(index, bc);
927
928 if (cpool->has_preresolution()
929 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
930 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
931 // Short-circuit lookups for JSR 292-related call sites.
932 // That is, do not rely only on name-based lookups, because they may fail
933 // if the names are not resolvable in the boot class loader (7056328).
934 switch (bc) {
935 case Bytecodes::_invokevirtual:
936 case Bytecodes::_invokeinterface:
937 case Bytecodes::_invokespecial:
938 case Bytecodes::_invokestatic:
939 {
940 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
941 if (m != nullptr) {
942 return get_method(m);
943 }
944 }
945 break;
946 default:
947 break;
948 }
949 }
950
951 if (holder_is_accessible) { // Our declared holder is loaded.
952 constantTag tag = cpool->tag_ref_at(index, bc);
953 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
954 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
955 if (m != nullptr &&
956 (bc == Bytecodes::_invokestatic
957 ? m->method_holder()->is_not_initialized()
958 : !m->method_holder()->is_loaded())) {
959 m = nullptr;
960 }
961 if (m != nullptr && ReplayCompiles && !ciReplay::is_loaded(m)) {
962 m = nullptr;
963 }
964 if (m != nullptr) {
965 // We found the method.
966 return get_method(m);
967 }
968 }
969
970 // Either the declared holder was not loaded, or the method could
971 // not be found. Create a dummy ciMethod to represent the failed
972 // lookup.
973 ciSymbol* name = get_symbol(name_sym);
974 ciSymbol* signature = get_symbol(sig_sym);
975 return get_unloaded_method(holder, name, signature, accessor);
976 }
977 }
978
979
980 // ------------------------------------------------------------------
981 // ciEnv::get_instance_klass_for_declared_method_holder
982 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
983 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
984 // instead of a ciInstanceKlass. For that case simply pretend that the
985 // declared holder is Object.clone since that's where the call will bottom out.
986 // A more correct fix would trickle out through many interfaces in CI,
987 // requiring ciInstanceKlass* to become ciKlass* and many more places would
988 // require checks to make sure the expected type was found. Given that this
989 // only occurs for clone() the more extensive fix seems like overkill so
990 // instead we simply smear the array type into Object.
991 guarantee(method_holder != nullptr, "no method holder");
992 if (method_holder->is_instance_klass()) {
993 return method_holder->as_instance_klass();
994 } else if (method_holder->is_array_klass()) {
995 return current()->Object_klass();
996 } else {
997 ShouldNotReachHere();
998 }
999 return nullptr;
1000 }
1001
1002
1003 // ------------------------------------------------------------------
1004 // ciEnv::get_method_by_index
1005 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
1006 int index, Bytecodes::Code bc,
1007 ciInstanceKlass* accessor) {
1008 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
1009 }
1010
1011
1012 // ------------------------------------------------------------------
1013 // ciEnv::name_buffer
1014 char *ciEnv::name_buffer(int req_len) {
1015 if (_name_buffer_len < req_len) {
1016 if (_name_buffer == nullptr) {
1017 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
1018 _name_buffer_len = req_len;
1019 } else {
1020 _name_buffer =
1021 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
1022 _name_buffer_len = req_len;
1023 }
1024 }
1025 return _name_buffer;
1026 }
1027
1028 // ------------------------------------------------------------------
1029 // ciEnv::is_in_vm
1030 bool ciEnv::is_in_vm() {
1031 return JavaThread::current()->thread_state() == _thread_in_vm;
1032 }
1033
1034 // ------------------------------------------------------------------
1035 // ciEnv::validate_compile_task_dependencies
1036 //
1037 // Check for changes during compilation (e.g. class loads, evolution,
1038 // breakpoints, call site invalidation).
1039 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1040 if (failing()) return; // no need for further checks
1041
1042 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1043 if (result != Dependencies::end_marker) {
1044 if (result == Dependencies::call_site_target_value) {
1045 _inc_decompile_count_on_failure = false;
1046 record_failure("call site target change");
1047 } else if (Dependencies::is_klass_type(result)) {
1048 record_failure("concurrent class loading");
1049 } else {
1050 record_failure("invalid non-klass dependency");
1051 }
1052 }
1053 }
1054
1055 // ------------------------------------------------------------------
1056 // ciEnv::register_method
1057 void ciEnv::register_method(ciMethod* target,
1058 int entry_bci,
1059 CodeOffsets* offsets,
1060 int orig_pc_offset,
1061 CodeBuffer* code_buffer,
1062 int frame_words,
1063 OopMapSet* oop_map_set,
1064 ExceptionHandlerTable* handler_table,
1065 ImplicitExceptionTable* inc_table,
1066 AbstractCompiler* compiler,
1067 bool has_unsafe_access,
1068 bool has_wide_vectors,
1069 bool has_monitors,
1070 int immediate_oops_patched,
1071 RTMState rtm_state) {
1072 VM_ENTRY_MARK;
1073 nmethod* nm = nullptr;
1074 {
1075 methodHandle method(THREAD, target->get_Method());
1076
1077 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1078 if (method->get_method_counters(THREAD) == nullptr) {
1079 record_failure("can't create method counters");
1080 // All buffers in the CodeBuffer are allocated in the CodeCache.
1081 // If the code buffer is created on each compile attempt
1082 // as in C2, then it must be freed.
1083 code_buffer->free_blob();
1084 return;
1085 }
1086
1087 // Check if memory should be freed before allocation
1088 CodeCache::gc_on_allocation();
1089
1090 // To prevent compile queue updates.
1091 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1092
1093 // Prevent InstanceKlass::add_to_hierarchy from running
1094 // and invalidating our dependencies until we install this method.
1095 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1096 MutexLocker ml(Compile_lock);
1097 NoSafepointVerifier nsv;
1098
1099 // Change in Jvmti state may invalidate compilation.
1100 if (!failing() && jvmti_state_changed()) {
1101 record_failure("Jvmti state change invalidated dependencies");
1102 }
1103
1104 // Change in DTrace flags may invalidate compilation.
1105 if (!failing() &&
1106 ( (!dtrace_method_probes() && DTraceMethodProbes) ||
1107 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1108 record_failure("DTrace flags change invalidated dependencies");
1109 }
1110
1111 if (!failing() && target->needs_clinit_barrier() &&
1112 target->holder()->is_in_error_state()) {
1113 record_failure("method holder is in error state");
1114 }
1115
1116 if (!failing()) {
1117 if (log() != nullptr) {
1118 // Log the dependencies which this compilation declares.
1119 dependencies()->log_all_dependencies();
1120 }
1121
1122 // Encode the dependencies now, so we can check them right away.
1123 dependencies()->encode_content_bytes();
1124
1125 // Check for {class loads, evolution, breakpoints, ...} during compilation
1126 validate_compile_task_dependencies(target);
1127 }
1128 #if INCLUDE_RTM_OPT
1129 if (!failing() && (rtm_state != NoRTM) &&
1130 (method()->method_data() != nullptr) &&
1131 (method()->method_data()->rtm_state() != rtm_state)) {
1132 // Preemptive decompile if rtm state was changed.
1133 record_failure("RTM state change invalidated rtm code");
1134 }
1135 #endif
1136
1137 if (failing()) {
1138 // While not a true deoptimization, it is a preemptive decompile.
1139 MethodData* mdo = method()->method_data();
1140 if (mdo != nullptr && _inc_decompile_count_on_failure) {
1141 mdo->inc_decompile_count();
1142 }
1143
1144 // All buffers in the CodeBuffer are allocated in the CodeCache.
1145 // If the code buffer is created on each compile attempt
1146 // as in C2, then it must be freed.
1147 code_buffer->free_blob();
1148 return;
1149 }
1150
1151 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1152 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1153
1154 nm = nmethod::new_nmethod(method,
1155 compile_id(),
1156 entry_bci,
1157 offsets,
1158 orig_pc_offset,
1159 debug_info(), dependencies(), code_buffer,
1160 frame_words, oop_map_set,
1161 handler_table, inc_table,
1162 compiler, CompLevel(task()->comp_level()));
1163
1164 // Free codeBlobs
1165 code_buffer->free_blob();
1166
1167 if (nm != nullptr) {
1168 nm->set_has_unsafe_access(has_unsafe_access);
1169 nm->set_has_wide_vectors(has_wide_vectors);
1170 nm->set_has_monitors(has_monitors);
1171 assert(!method->is_synchronized() || nm->has_monitors(), "");
1172 #if INCLUDE_RTM_OPT
1173 nm->set_rtm_state(rtm_state);
1174 #endif
1175
1176 if (entry_bci == InvocationEntryBci) {
1177 if (TieredCompilation) {
1178 // If there is an old version we're done with it
1179 CompiledMethod* old = method->code();
1180 if (TraceMethodReplacement && old != nullptr) {
1181 ResourceMark rm;
1182 char *method_name = method->name_and_sig_as_C_string();
1183 tty->print_cr("Replacing method %s", method_name);
1184 }
1185 if (old != nullptr) {
1186 old->make_not_used();
1187 }
1188 }
1189
1190 LogTarget(Info, nmethod, install) lt;
1191 if (lt.is_enabled()) {
1192 ResourceMark rm;
1193 char *method_name = method->name_and_sig_as_C_string();
1194 lt.print("Installing method (%d) %s ",
1195 task()->comp_level(), method_name);
1196 }
1197 // Allow the code to be executed
1198 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1199 if (nm->make_in_use()) {
1200 method->set_code(method, nm);
1201 }
1202 } else {
1203 LogTarget(Info, nmethod, install) lt;
1204 if (lt.is_enabled()) {
1205 ResourceMark rm;
1206 char *method_name = method->name_and_sig_as_C_string();
1207 lt.print("Installing osr method (%d) %s @ %d",
1208 task()->comp_level(), method_name, entry_bci);
1209 }
1210 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1211 if (nm->make_in_use()) {
1212 method->method_holder()->add_osr_nmethod(nm);
1213 }
1214 }
1215 }
1216 }
1217
1218 NoSafepointVerifier nsv;
1219 if (nm != nullptr) {
1220 // Compilation succeeded, post what we know about it
1221 nm->post_compiled_method(task());
1222 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1223 } else {
1224 // The CodeCache is full.
1225 record_failure("code cache is full");
1226 }
1227
1228 // safepoints are allowed again
1229 }
1230
1231 // ------------------------------------------------------------------
1232 // ciEnv::find_system_klass
1233 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1234 VM_ENTRY_MARK;
1235 return get_klass_by_name_impl(nullptr, constantPoolHandle(), klass_name, false);
1236 }
1237
1238 // ------------------------------------------------------------------
1239 // ciEnv::comp_level
1240 int ciEnv::comp_level() {
1241 if (task() == nullptr) return CompilationPolicy::highest_compile_level();
1242 return task()->comp_level();
1243 }
1244
1245 // ------------------------------------------------------------------
1246 // ciEnv::compile_id
1247 int ciEnv::compile_id() {
1248 if (task() == nullptr) return 0;
1249 return task()->compile_id();
1250 }
1251
1252 // ------------------------------------------------------------------
1253 // ciEnv::notice_inlined_method()
1254 void ciEnv::notice_inlined_method(ciMethod* method) {
1255 _num_inlined_bytecodes += method->code_size_for_inlining();
1256 }
1257
1258 // ------------------------------------------------------------------
1259 // ciEnv::num_inlined_bytecodes()
1260 int ciEnv::num_inlined_bytecodes() const {
1261 return _num_inlined_bytecodes;
1262 }
1263
1264 // ------------------------------------------------------------------
1265 // ciEnv::record_failure()
1266 void ciEnv::record_failure(const char* reason) {
1267 if (_failure_reason == nullptr) {
1268 // Record the first failure reason.
1269 _failure_reason = reason;
1270 }
1271 }
1272
1273 void ciEnv::report_failure(const char* reason) {
1274 EventCompilationFailure event;
1275 if (event.should_commit()) {
1276 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1277 }
1278 }
1279
1280 // ------------------------------------------------------------------
1281 // ciEnv::record_method_not_compilable()
1282 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1283 int new_compilable =
1284 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1285
1286 // Only note transitions to a worse state
1287 if (new_compilable > _compilable) {
1288 if (log() != nullptr) {
1289 if (all_tiers) {
1290 log()->elem("method_not_compilable");
1291 } else {
1292 log()->elem("method_not_compilable_at_tier level='%d'",
1293 current()->task()->comp_level());
1294 }
1295 }
1296 _compilable = new_compilable;
1297
1298 // Reset failure reason; this one is more important.
1299 _failure_reason = nullptr;
1300 record_failure(reason);
1301 }
1302 }
1303
1304 // ------------------------------------------------------------------
1305 // ciEnv::record_out_of_memory_failure()
1306 void ciEnv::record_out_of_memory_failure() {
1307 // If memory is low, we stop compiling methods.
1308 record_method_not_compilable("out of memory");
1309 }
1310
1311 ciInstance* ciEnv::unloaded_ciinstance() {
1312 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1313 }
1314
1315 // ------------------------------------------------------------------
1316 // Replay support
1317
1318
1319 // Lookup location descriptor for the class, if any.
1320 // Returns false if not found.
1321 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1322 bool found = false;
1323 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1324 if (!found) {
1325 return false;
1326 }
1327 loc = _dyno_locs->at(pos);
1328 return found;
1329 }
1330
1331 // Associate the current location descriptor with the given class and record for later lookup.
1332 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1333 const char *loc = os::strdup(_dyno_name);
1334 bool found = false;
1335 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1336 if (found) {
1337 _dyno_locs->at_put(pos, loc);
1338 } else {
1339 _dyno_klasses->insert_before(pos, ik);
1340 _dyno_locs->insert_before(pos, loc);
1341 }
1342 }
1343
1344 // Associate the current location descriptor with the given class and record for later lookup.
1345 // If it turns out that there are multiple locations for the given class, that conflict should
1346 // be handled here. Currently we choose the first location found.
1347 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1348 if (!ik->is_hidden()) {
1349 return;
1350 }
1351 const char *loc0;
1352 if (!dyno_loc(ik, loc0)) {
1353 set_dyno_loc(ik);
1354 }
1355 }
1356
1357 // Look up the location descriptor for the given class and print it to the output stream.
1358 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1359 const char *loc;
1360 if (dyno_loc(ik, loc)) {
1361 out->print("%s", loc);
1362 return true;
1363 } else {
1364 return false;
1365 }
1366 }
1367
1368 // Look up the location descriptor for the given class and return it as a string.
1369 // Returns null if no location is found.
1370 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1371 if (ik->is_hidden()) {
1372 stringStream ss;
1373 if (print_dyno_loc(&ss, ik)) {
1374 ss.print(" ;"); // add terminator
1375 const char* call_site = ss.as_string();
1376 return call_site;
1377 }
1378 }
1379 return nullptr;
1380 }
1381
1382 // Look up the location descriptor for the given class and return it as a string.
1383 // Returns the class name as a fallback if no location is found.
1384 const char *ciEnv::replay_name(ciKlass* k) const {
1385 if (k->is_instance_klass()) {
1386 return replay_name(k->as_instance_klass()->get_instanceKlass());
1387 }
1388 return k->name()->as_quoted_ascii();
1389 }
1390
1391 // Look up the location descriptor for the given class and return it as a string.
1392 // Returns the class name as a fallback if no location is found.
1393 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1394 const char* name = dyno_name(ik);
1395 if (name != nullptr) {
1396 return name;
1397 }
1398 return ik->name()->as_quoted_ascii();
1399 }
1400
1401 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1402 void ciEnv::record_member(Thread* thread, oop member) {
1403 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1404 // Check MemberName.clazz field
1405 oop clazz = java_lang_invoke_MemberName::clazz(member);
1406 if (clazz->klass()->is_instance_klass()) {
1407 RecordLocation fp(this, "clazz");
1408 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1409 record_best_dyno_loc(ik);
1410 }
1411 // Check MemberName.method.vmtarget field
1412 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1413 if (vmtarget != nullptr) {
1414 RecordLocation fp2(this, "<vmtarget>");
1415 InstanceKlass* ik = vmtarget->method_holder();
1416 record_best_dyno_loc(ik);
1417 }
1418 }
1419
1420 // Read an object field. Lookup is done by name only.
1421 static inline oop obj_field(oop obj, const char* name) {
1422 return ciReplay::obj_field(obj, name);
1423 }
1424
1425 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1426 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1427 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1428
1429 {
1430 // Check LambdaForm.vmentry field
1431 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1432 RecordLocation fp0(this, "vmentry");
1433 record_member(thread, member);
1434 }
1435
1436 // Check LambdaForm.names array
1437 objArrayOop names = (objArrayOop)obj_field(form, "names");
1438 if (names != nullptr) {
1439 RecordLocation lp0(this, "names");
1440 int len = names->length();
1441 for (int i = 0; i < len; ++i) {
1442 oop name = names->obj_at(i);
1443 RecordLocation lp1(this, "%d", i);
1444 // Check LambdaForm.names[i].function field
1445 RecordLocation lp2(this, "function");
1446 oop function = obj_field(name, "function");
1447 if (function != nullptr) {
1448 // Check LambdaForm.names[i].function.member field
1449 oop member = obj_field(function, "member");
1450 if (member != nullptr) {
1451 RecordLocation lp3(this, "member");
1452 record_member(thread, member);
1453 }
1454 // Check LambdaForm.names[i].function.resolvedHandle field
1455 oop mh = obj_field(function, "resolvedHandle");
1456 if (mh != nullptr) {
1457 RecordLocation lp3(this, "resolvedHandle");
1458 record_mh(thread, mh);
1459 }
1460 // Check LambdaForm.names[i].function.invoker field
1461 oop invoker = obj_field(function, "invoker");
1462 if (invoker != nullptr) {
1463 RecordLocation lp3(this, "invoker");
1464 record_mh(thread, invoker);
1465 }
1466 }
1467 }
1468 }
1469 }
1470
1471 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1472 void ciEnv::record_mh(Thread* thread, oop mh) {
1473 {
1474 // Check MethodHandle.form field
1475 oop form = java_lang_invoke_MethodHandle::form(mh);
1476 RecordLocation fp(this, "form");
1477 record_lambdaform(thread, form);
1478 }
1479 // Check DirectMethodHandle.member field
1480 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1481 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1482 RecordLocation fp(this, "member");
1483 record_member(thread, member);
1484 } else {
1485 // Check <MethodHandle subclass>.argL<n> fields
1486 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1487 char arg_name[] = "argLXX";
1488 int max_arg = 99;
1489 for (int index = 0; index <= max_arg; ++index) {
1490 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1491 oop arg = obj_field(mh, arg_name);
1492 if (arg != nullptr) {
1493 RecordLocation fp(this, "%s", arg_name);
1494 if (arg->klass()->is_instance_klass()) {
1495 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1496 record_best_dyno_loc(ik2);
1497 record_call_site_obj(thread, arg);
1498 }
1499 } else {
1500 break;
1501 }
1502 }
1503 }
1504 }
1505
1506 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1507 // Types currently supported are MethodHandle and CallSite.
1508 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1509 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1510 {
1511 if (obj != nullptr) {
1512 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1513 record_mh(thread, obj);
1514 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1515 oop target = java_lang_invoke_CallSite::target(obj);
1516 if (target->klass()->is_instance_klass()) {
1517 RecordLocation fp(this, "target");
1518 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1519 record_best_dyno_loc(ik);
1520 }
1521 }
1522 }
1523 }
1524
1525 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1526 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1527 InstanceKlass* holder = adapter->method_holder();
1528 if (!holder->is_hidden()) {
1529 return;
1530 }
1531 RecordLocation fp(this, "<adapter>");
1532 record_best_dyno_loc(holder);
1533 }
1534
1535 // Process an invokedynamic call site and record any dynamic locations.
1536 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1537 int index = cp->decode_invokedynamic_index(indy_index);
1538 ResolvedIndyEntry* indy_info = cp->resolved_indy_entry_at(index);
1539 if (indy_info->method() != nullptr) {
1540 // process the adapter
1541 Method* adapter = indy_info->method();
1542 record_call_site_method(thread, adapter);
1543 // process the appendix
1544 oop appendix = cp->resolved_reference_from_indy(index);
1545 {
1546 RecordLocation fp(this, "<appendix>");
1547 record_call_site_obj(thread, appendix);
1548 }
1549 // process the BSM
1550 int pool_index = indy_info->constant_pool_index();
1551 BootstrapInfo bootstrap_specifier(cp, pool_index, index);
1552 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1553 {
1554 RecordLocation fp(this, "<bsm>");
1555 record_call_site_obj(thread, bsm);
1556 }
1557 }
1558 }
1559
1560 // Process an invokehandle call site and record any dynamic locations.
1561 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1562 const int holder_index = cp->klass_ref_index_at(index, Bytecodes::_invokehandle);
1563 if (!cp->tag_at(holder_index).is_klass()) {
1564 return; // not resolved
1565 }
1566 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1567 Symbol* name = cp->name_ref_at(index, Bytecodes::_invokehandle);
1568 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1569 ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
1570 if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) {
1571 // process the adapter
1572 Method* adapter = cp_cache_entry->f1_as_method();
1573 oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1574 record_call_site_method(thread, adapter);
1575 // process the appendix
1576 {
1577 RecordLocation fp(this, "<appendix>");
1578 record_call_site_obj(thread, appendix);
1579 }
1580 }
1581 }
1582 }
1583
1584 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1585 // constant pool entries and record for future lookup.
1586 void ciEnv::find_dynamic_call_sites() {
1587 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, nullptr);
1588 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, nullptr);
1589
1590 // Iterate over the class hierarchy
1591 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1592 Klass* sub = iter.klass();
1593 if (sub->is_instance_klass()) {
1594 InstanceKlass *isub = InstanceKlass::cast(sub);
1595 InstanceKlass* ik = isub;
1596 if (!ik->is_linked()) {
1597 continue;
1598 }
1599 if (ik->is_hidden()) {
1600 continue;
1601 }
1602 JavaThread* thread = JavaThread::current();
1603 const constantPoolHandle pool(thread, ik->constants());
1604
1605 // Look for invokedynamic/invokehandle call sites
1606 for (int i = 0; i < ik->methods()->length(); ++i) {
1607 Method* m = ik->methods()->at(i);
1608
1609 BytecodeStream bcs(methodHandle(thread, m));
1610 while (!bcs.is_last_bytecode()) {
1611 Bytecodes::Code opcode = bcs.next();
1612 opcode = bcs.raw_code();
1613 switch (opcode) {
1614 case Bytecodes::_invokedynamic:
1615 case Bytecodes::_invokehandle: {
1616 RecordLocation fp(this, "@bci %s %s %s %d",
1617 ik->name()->as_quoted_ascii(),
1618 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1619 bcs.bci());
1620 if (opcode == Bytecodes::_invokedynamic) {
1621 int index = bcs.get_index_u4();
1622 process_invokedynamic(pool, index, thread);
1623 } else {
1624 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1625 int cp_cache_index = bcs.get_index_u2_cpcache();
1626 process_invokehandle(pool, cp_cache_index, thread);
1627 }
1628 break;
1629 }
1630 default:
1631 break;
1632 }
1633 }
1634 }
1635
1636 // Look for MethodHandle constant pool entries
1637 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1638 int len = pool->length();
1639 for (int i = 0; i < len; ++i) {
1640 if (pool->tag_at(i).is_method_handle()) {
1641 bool found_it;
1642 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1643 if (mh != nullptr) {
1644 RecordLocation fp(this, "%d", i);
1645 record_mh(thread, mh);
1646 }
1647 }
1648 }
1649 }
1650 }
1651 }
1652
1653 void ciEnv::dump_compile_data(outputStream* out) {
1654 CompileTask* task = this->task();
1655 if (task) {
1656 #ifdef COMPILER2
1657 if (ReplayReduce && compiler_data() != nullptr) {
1658 // Dump C2 "reduced" inlining data.
1659 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1660 }
1661 #endif
1662 Method* method = task->method();
1663 int entry_bci = task->osr_bci();
1664 int comp_level = task->comp_level();
1665 out->print("compile ");
1666 get_method(method)->dump_name_as_ascii(out);
1667 out->print(" %d %d", entry_bci, comp_level);
1668 if (compiler_data() != nullptr) {
1669 if (is_c2_compile(comp_level)) {
1670 #ifdef COMPILER2
1671 // Dump C2 inlining data.
1672 ((Compile*)compiler_data())->dump_inline_data(out);
1673 #endif
1674 } else if (is_c1_compile(comp_level)) {
1675 #ifdef COMPILER1
1676 // Dump C1 inlining data.
1677 ((Compilation*)compiler_data())->dump_inline_data(out);
1678 #endif
1679 }
1680 }
1681 out->cr();
1682 }
1683 }
1684
1685 // Called from VM error reporter, so be careful.
1686 // Don't safepoint or acquire any locks.
1687 //
1688 void ciEnv::dump_replay_data_helper(outputStream* out) {
1689 NoSafepointVerifier no_safepoint;
1690 ResourceMark rm;
1691
1692 dump_replay_data_version(out);
1693 #if INCLUDE_JVMTI
1694 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1695 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1696 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1697 #endif // INCLUDE_JVMTI
1698
1699 find_dynamic_call_sites();
1700
1701 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1702 out->print_cr("# %d ciObject found", objects->length());
1703
1704 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1705 // protection domain to load subsequent classes during replay compilation.
1706 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1707
1708 for (int i = 0; i < objects->length(); i++) {
1709 objects->at(i)->dump_replay_data(out);
1710 }
1711 dump_compile_data(out);
1712 out->flush();
1713 }
1714
1715 // Called from VM error reporter, so be careful.
1716 // Don't safepoint or acquire any locks.
1717 //
1718 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1719 GUARDED_VM_ENTRY(
1720 dump_replay_data_helper(out);
1721 )
1722 }
1723
1724 void ciEnv::dump_replay_data(outputStream* out) {
1725 GUARDED_VM_ENTRY(
1726 MutexLocker ml(Compile_lock);
1727 dump_replay_data_helper(out);
1728 )
1729 }
1730
1731 void ciEnv::dump_replay_data(int compile_id) {
1732 char buffer[64];
1733 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1734 if (ret > 0) {
1735 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1736 if (fd != -1) {
1737 FILE* replay_data_file = os::fdopen(fd, "w");
1738 if (replay_data_file != nullptr) {
1739 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1740 dump_replay_data(&replay_data_stream);
1741 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1742 } else {
1743 tty->print_cr("# Can't open file to dump replay data.");
1744 close(fd);
1745 }
1746 }
1747 }
1748 }
1749
1750 void ciEnv::dump_inline_data(int compile_id) {
1751 char buffer[64];
1752 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1753 if (ret > 0) {
1754 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1755 if (fd != -1) {
1756 FILE* inline_data_file = os::fdopen(fd, "w");
1757 if (inline_data_file != nullptr) {
1758 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1759 GUARDED_VM_ENTRY(
1760 MutexLocker ml(Compile_lock);
1761 dump_replay_data_version(&replay_data_stream);
1762 dump_compile_data(&replay_data_stream);
1763 )
1764 replay_data_stream.flush();
1765 tty->print("# Compiler inline data is saved as: ");
1766 tty->print_cr("%s", buffer);
1767 } else {
1768 tty->print_cr("# Can't open file to dump inline data.");
1769 close(fd);
1770 }
1771 }
1772 }
1773 }
1774
1775 void ciEnv::dump_replay_data_version(outputStream* out) {
1776 out->print_cr("version %d", REPLAY_VERSION);
1777 }