1 /*
2 * Copyright (c) 1999, 2022, 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 "jvm.h"
27 #include "ci/ciConstant.hpp"
28 #include "ci/ciEnv.hpp"
29 #include "ci/ciField.hpp"
30 #include "ci/ciInlineKlass.hpp"
31 #include "ci/ciInstance.hpp"
32 #include "ci/ciInstanceKlass.hpp"
33 #include "ci/ciMethod.hpp"
34 #include "ci/ciNullObject.hpp"
35 #include "ci/ciReplay.hpp"
36 #include "ci/ciSymbols.hpp"
37 #include "ci/ciUtilities.inline.hpp"
38 #include "classfile/javaClasses.hpp"
39 #include "classfile/javaClasses.inline.hpp"
40 #include "classfile/systemDictionary.hpp"
41 #include "classfile/vmClasses.hpp"
42 #include "classfile/vmSymbols.hpp"
43 #include "code/codeCache.hpp"
44 #include "code/scopeDesc.hpp"
45 #include "compiler/compilationLog.hpp"
46 #include "compiler/compilationPolicy.hpp"
47 #include "compiler/compileBroker.hpp"
48 #include "compiler/compilerEvent.hpp"
49 #include "compiler/compileLog.hpp"
50 #include "compiler/compileTask.hpp"
51 #include "compiler/disassembler.hpp"
52 #include "gc/shared/collectedHeap.inline.hpp"
53 #include "interpreter/bytecodeStream.hpp"
54 #include "interpreter/linkResolver.hpp"
55 #include "jfr/jfrEvents.hpp"
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 = NULL;
96 VM_CLASSES_DO(VM_CLASS_DEFN)
97 #undef VM_CLASS_DEFN
98
99 ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
100 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
101 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
102
103 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
104 jobject ciEnv::_ArrayStoreException_handle = NULL;
105 jobject ciEnv::_ClassCastException_handle = NULL;
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 = NULL;
122 _debug_info = NULL;
123 _dependencies = NULL;
124 _failure_reason = NULL;
125 _inc_decompile_count_on_failure = true;
126 _compilable = MethodCompilable;
127 _break_at_compile = false;
128 _compiler_data = NULL;
129 #ifndef PRODUCT
130 assert(!firstEnv, "not initialized properly");
131 #endif /* !PRODUCT */
132
133 _num_inlined_bytecodes = 0;
134 assert(task == NULL || thread->task() == task, "sanity");
135 if (task != NULL) {
136 task->mark_started(os::elapsed_counter());
137 }
138 _task = task;
139 _log = NULL;
140
141 // Temporary buffer for creating symbols and such.
142 _name_buffer = NULL;
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 != NULL, "should have been initialized");
158 _NullPointerException_instance = get_object(o)->as_instance();
159 o = Universe::arithmetic_exception_instance();
160 assert(o != NULL, "should have been initialized");
161 _ArithmeticException_instance = get_object(o)->as_instance();
162
163 _ArrayIndexOutOfBoundsException_instance = NULL;
164 _ArrayStoreException_instance = NULL;
165 _ClassCastException_instance = NULL;
166 _the_null_string = NULL;
167 _the_min_jint_string = NULL;
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 = NULL;
176 _dyno_locs = NULL;
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() == NULL, "must be");
247 current_thread->set_env(this);
248 assert(ciEnv::current() == this, "sanity");
249
250 _oop_recorder = NULL;
251 _debug_info = NULL;
252 _dependencies = NULL;
253 _failure_reason = NULL;
254 _inc_decompile_count_on_failure = true;
255 _compilable = MethodCompilable_never;
256 _break_at_compile = false;
257 _compiler_data = NULL;
258 #ifndef PRODUCT
259 assert(firstEnv, "must be first");
260 firstEnv = false;
261 #endif /* !PRODUCT */
262
263 _num_inlined_bytecodes = 0;
264 _task = NULL;
265 _log = NULL;
266
267 // Temporary buffer for creating symbols and such.
268 _name_buffer = NULL;
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 = NULL;
283 _ArithmeticException_instance = NULL;
284 _ArrayIndexOutOfBoundsException_instance = NULL;
285 _ArrayStoreException_instance = NULL;
286 _ClassCastException_instance = NULL;
287 _the_null_string = NULL;
288 _the_min_jint_string = NULL;
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 = NULL;
297 _dyno_locs = NULL;
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(NULL);
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 != NULL && _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_extended_probes = ExtendedDTraceProbes;
365 if (_dtrace_extended_probes) {
366 _dtrace_method_probes = true;
367 _dtrace_alloc_probes = true;
368 } else {
369 _dtrace_method_probes = DTraceMethodProbes;
370 _dtrace_alloc_probes = DTraceAllocProbes;
371 }
372 }
373
374 // ------------------------------------------------------------------
375 // helper for lazy exception creation
376 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
377 VM_ENTRY_MARK;
378 if (handle == NULL) {
379 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
380 InstanceKlass* ik = SystemDictionary::find_instance_klass(THREAD, name, Handle(), Handle());
381 jobject objh = NULL;
382 if (ik != NULL) {
383 oop obj = ik->allocate_instance(THREAD);
384 if (!HAS_PENDING_EXCEPTION)
385 objh = JNIHandles::make_global(Handle(THREAD, obj));
386 }
387 if (HAS_PENDING_EXCEPTION) {
388 CLEAR_PENDING_EXCEPTION;
389 } else {
390 handle = objh;
391 }
392 }
393 oop obj = JNIHandles::resolve(handle);
394 return obj == NULL? NULL: get_object(obj)->as_instance();
395 }
396
397 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
398 switch (type) {
399 case T_BOOLEAN: return Boolean_klass();
400 case T_BYTE : return Byte_klass();
401 case T_CHAR : return Character_klass();
402 case T_SHORT : return Short_klass();
403 case T_INT : return Integer_klass();
404 case T_LONG : return Long_klass();
405 case T_FLOAT : return Float_klass();
406 case T_DOUBLE : return Double_klass();
407
408 default:
409 assert(false, "not a primitive: %s", type2name(type));
410 return NULL;
411 }
412 }
413
414 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
415 if (_ArrayIndexOutOfBoundsException_instance == NULL) {
416 _ArrayIndexOutOfBoundsException_instance
417 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
418 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
419 }
420 return _ArrayIndexOutOfBoundsException_instance;
421 }
422 ciInstance* ciEnv::ArrayStoreException_instance() {
423 if (_ArrayStoreException_instance == NULL) {
424 _ArrayStoreException_instance
425 = get_or_create_exception(_ArrayStoreException_handle,
426 vmSymbols::java_lang_ArrayStoreException());
427 }
428 return _ArrayStoreException_instance;
429 }
430 ciInstance* ciEnv::ClassCastException_instance() {
431 if (_ClassCastException_instance == NULL) {
432 _ClassCastException_instance
433 = get_or_create_exception(_ClassCastException_handle,
434 vmSymbols::java_lang_ClassCastException());
435 }
436 return _ClassCastException_instance;
437 }
438
439 ciInstance* ciEnv::the_null_string() {
440 if (_the_null_string == NULL) {
441 VM_ENTRY_MARK;
442 _the_null_string = get_object(Universe::the_null_string())->as_instance();
443 }
444 return _the_null_string;
445 }
446
447 ciInstance* ciEnv::the_min_jint_string() {
448 if (_the_min_jint_string == NULL) {
449 VM_ENTRY_MARK;
450 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
451 }
452 return _the_min_jint_string;
453 }
454
455 // ------------------------------------------------------------------
456 // ciEnv::get_method_from_handle
457 ciMethod* ciEnv::get_method_from_handle(Method* method) {
458 VM_ENTRY_MARK;
459 return get_metadata(method)->as_method();
460 }
461
462 // ------------------------------------------------------------------
463 // ciEnv::check_klass_accessiblity
464 //
465 // Note: the logic of this method should mirror the logic of
466 // ConstantPool::verify_constant_pool_resolve.
467 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
468 Klass* resolved_klass) {
469 if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
470 return true;
471 }
472 if (accessing_klass->is_obj_array_klass()) {
473 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
474 }
475 if (!accessing_klass->is_instance_klass()) {
476 return true;
477 }
478
479 if (resolved_klass->is_objArray_klass()) {
480 // Find the element klass, if this is an array.
481 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
482 }
483 if (resolved_klass->is_instance_klass()) {
484 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
485 InstanceKlass::cast(resolved_klass),
486 true) == Reflection::ACCESS_OK);
487 }
488 return true;
489 }
490
491 // ------------------------------------------------------------------
492 // ciEnv::get_klass_by_name_impl
493 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
494 const constantPoolHandle& cpool,
495 ciSymbol* name,
496 bool require_local) {
497 ASSERT_IN_VM;
498 Thread* current = Thread::current();
499
500 // Now we need to check the SystemDictionary
501 Symbol* sym = name->get_symbol();
502 if (Signature::has_envelope(sym)) {
503 // This is a name from a signature. Strip off the trimmings.
504 // Call recursive to keep scope of strippedsym.
505 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
506 ciSymbol* strippedname = get_symbol(strippedsym);
507 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
508 }
509
510 // Check for prior unloaded klass. The SystemDictionary's answers
511 // can vary over time but the compiler needs consistency.
512 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
513 if (unloaded_klass != NULL) {
514 if (require_local) return NULL;
515 return unloaded_klass;
516 }
517
518 Handle loader;
519 Handle domain;
520 if (accessing_klass != NULL) {
521 loader = Handle(current, accessing_klass->loader());
522 domain = Handle(current, accessing_klass->protection_domain());
523 }
524
525 Klass* found_klass;
526 {
527 ttyUnlocker ttyul; // release tty lock to avoid ordering problems
528 MutexLocker ml(current, Compile_lock);
529 Klass* kls;
530 if (!require_local) {
531 kls = SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
532 } else {
533 kls = SystemDictionary::find_instance_or_array_klass(current, sym, loader, domain);
534 }
535 found_klass = kls;
536 }
537
538 // If we fail to find an array klass, look again for its element type.
539 // The element type may be available either locally or via constraints.
540 // In either case, if we can find the element type in the system dictionary,
541 // we must build an array type around it. The CI requires array klasses
542 // to be loaded if their element klasses are loaded, except when memory
543 // is exhausted.
544 if (Signature::is_array(sym) &&
545 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
546 sym->char_at(1) == JVM_SIGNATURE_CLASS ||
547 sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT )) {
548 // We have an unloaded array.
549 // Build it on the fly if the element class exists.
550 SignatureStream ss(sym, false);
551 ss.skip_array_prefix(1);
552 // Get element ciKlass recursively.
553 ciKlass* elem_klass =
554 get_klass_by_name_impl(accessing_klass,
555 cpool,
556 get_symbol(ss.as_symbol()),
557 require_local);
558 if (elem_klass != NULL && elem_klass->is_loaded()) {
559 // Now make an array for it
560 bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT;
561 return ciArrayKlass::make(elem_klass, null_free_array);
562 }
563 }
564
565 if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) {
566 // Look inside the constant pool for pre-resolved class entries.
567 for (int i = cpool->length() - 1; i >= 1; i--) {
568 if (cpool->tag_at(i).is_klass()) {
569 Klass* kls = cpool->resolved_klass_at(i);
570 if (kls->name() == sym) {
571 found_klass = kls;
572 break;
573 }
574 }
575 }
576 }
577
578 if (found_klass != NULL) {
579 // Found it. Build a CI handle.
580 return get_klass(found_klass);
581 }
582
583 if (require_local) return NULL;
584
585 // Not yet loaded into the VM, or not governed by loader constraints.
586 // Make a CI representative for it.
587 int i = 0;
588 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
589 i++;
590 }
591 if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
592 // An unloaded array class of inline types is an ObjArrayKlass, an
593 // unloaded inline type class is an InstanceKlass. For consistency,
594 // make the signature of the unloaded array of inline type use L
595 // rather than Q.
596 char* new_name = name_buffer(sym->utf8_length()+1);
597 strncpy(new_name, (char*)sym->base(), sym->utf8_length());
598 new_name[i] = JVM_SIGNATURE_CLASS;
599 new_name[sym->utf8_length()] = '\0';
600 return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name));
601 }
602 return get_unloaded_klass(accessing_klass, name);
603 }
604
605 // ------------------------------------------------------------------
606 // ciEnv::get_klass_by_name
607 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
608 ciSymbol* klass_name,
609 bool require_local) {
610 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
611 constantPoolHandle(),
612 klass_name,
613 require_local);)
614 }
615
616 // ------------------------------------------------------------------
617 // ciEnv::get_klass_by_index_impl
618 //
619 // Implementation of get_klass_by_index.
620 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
621 int index,
622 bool& is_accessible,
623 ciInstanceKlass* accessor) {
624 Klass* klass = NULL;
625 Symbol* klass_name = NULL;
626
627 if (cpool->tag_at(index).is_symbol()) {
628 klass_name = cpool->symbol_at(index);
629 } else {
630 // Check if it's resolved if it's not a symbol constant pool entry.
631 klass = ConstantPool::klass_at_if_loaded(cpool, index);
632 // Try to look it up by name.
633 if (klass == NULL) {
634 klass_name = cpool->klass_name_at(index);
635 }
636 }
637
638 if (klass == NULL) {
639 // Not found in constant pool. Use the name to do the lookup.
640 ciKlass* k = get_klass_by_name_impl(accessor,
641 cpool,
642 get_symbol(klass_name),
643 false);
644 // Calculate accessibility the hard way.
645 if (!k->is_loaded()) {
646 is_accessible = false;
647 } else if (k->loader() != accessor->loader() &&
648 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
649 // Loaded only remotely. Not linked yet.
650 is_accessible = false;
651 } else {
652 // Linked locally, and we must also check public/private, etc.
653 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
654 }
655 return k;
656 }
657
658 // Check for prior unloaded klass. The SystemDictionary's answers
659 // can vary over time but the compiler needs consistency.
660 ciSymbol* name = get_symbol(klass->name());
661 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
662 if (unloaded_klass != NULL) {
663 is_accessible = false;
664 return unloaded_klass;
665 }
666
667 // It is known to be accessible, since it was found in the constant pool.
668 ciKlass* ciKlass = get_klass(klass);
669 is_accessible = true;
670 if (ReplayCompiles && ciKlass == _unloaded_ciinstance_klass) {
671 // Klass was unresolved at replay dump time and therefore not accessible.
672 is_accessible = false;
673 }
674 return ciKlass;
675 }
676
677 // ------------------------------------------------------------------
678 // ciEnv::get_klass_by_index
679 //
680 // Get a klass from the constant pool.
681 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
682 int index,
683 bool& is_accessible,
684 ciInstanceKlass* accessor) {
685 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
686 }
687
688 // ------------------------------------------------------------------
689 // ciEnv::is_inline_klass
690 //
691 // Check if the klass is an inline klass.
692 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) {
693 GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();)
694 }
695
696 // ------------------------------------------------------------------
697 // ciEnv::unbox_primitive_value
698 //
699 // Unbox a primitive and return it as a ciConstant.
700 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
701 jvalue value;
702 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
703 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
704 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
705 return ciConstant();
706 }
707 switch (bt) {
708 case T_BOOLEAN: return ciConstant(bt, value.z);
709 case T_BYTE: return ciConstant(bt, value.b);
710 case T_SHORT: return ciConstant(bt, value.s);
711 case T_CHAR: return ciConstant(bt, value.c);
712 case T_INT: return ciConstant(bt, value.i);
713 case T_LONG: return ciConstant(value.j);
714 case T_FLOAT: return ciConstant(value.f);
715 case T_DOUBLE: return ciConstant(value.d);
716
717 default:
718 assert(false, "not a primitive type: %s", type2name(bt));
719 return ciConstant();
720 }
721 }
722
723 // ------------------------------------------------------------------
724 // ciEnv::get_resolved_constant
725 //
726 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
727 assert(obj_index >= 0, "");
728 oop obj = cpool->resolved_references()->obj_at(obj_index);
729 if (obj == NULL) {
730 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
731 // Null constant is represented as a sentinel (non-null) value.
732 return ciConstant();
733 } else if (obj == Universe::the_null_sentinel()) {
734 return ciConstant(T_OBJECT, get_object(NULL));
735 } else {
736 ciObject* ciobj = get_object(obj);
737 if (ciobj->is_array()) {
738 return ciConstant(T_ARRAY, ciobj);
739 } else {
740 int cp_index = cpool->object_to_cp_index(obj_index);
741 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
742 if (is_java_primitive(bt)) {
743 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
744 return unbox_primitive_value(ciobj, bt);
745 } else {
746 assert(ciobj->is_instance(), "should be an instance");
747 return ciConstant(T_OBJECT, ciobj);
748 }
749 }
750 }
751 }
752
753 // ------------------------------------------------------------------
754 // ciEnv::get_constant_by_index_impl
755 //
756 // Implementation of get_constant_by_index().
757 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
758 int index, int obj_index,
759 ciInstanceKlass* accessor) {
760 if (obj_index >= 0) {
761 ciConstant con = get_resolved_constant(cpool, obj_index);
762 if (con.is_valid()) {
763 return con;
764 }
765 }
766 constantTag tag = cpool->tag_at(index);
767 if (tag.is_int()) {
768 return ciConstant(T_INT, (jint)cpool->int_at(index));
769 } else if (tag.is_long()) {
770 return ciConstant((jlong)cpool->long_at(index));
771 } else if (tag.is_float()) {
772 return ciConstant((jfloat)cpool->float_at(index));
773 } else if (tag.is_double()) {
774 return ciConstant((jdouble)cpool->double_at(index));
775 } else if (tag.is_string()) {
776 EXCEPTION_CONTEXT;
777 assert(obj_index >= 0, "should have an object index");
778 oop string = cpool->string_at(index, obj_index, THREAD);
779 if (HAS_PENDING_EXCEPTION) {
780 CLEAR_PENDING_EXCEPTION;
781 record_out_of_memory_failure();
782 return ciConstant();
783 }
784 ciInstance* constant = get_object(string)->as_instance();
785 return ciConstant(T_OBJECT, constant);
786 } else if (tag.is_unresolved_klass_in_error()) {
787 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(NULL));
788 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
789 bool will_link;
790 ciKlass* klass = get_klass_by_index_impl(cpool, index, will_link, accessor);
791 ciInstance* mirror = (will_link ? klass->java_mirror() : get_unloaded_klass_mirror(klass));
792 if (klass->is_loaded() && tag.is_Qdescriptor_klass()) {
793 return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror());
794 } else {
795 return ciConstant(T_OBJECT, mirror);
796 }
797 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
798 // must execute Java code to link this CP entry into cache[i].f1
799 assert(obj_index >= 0, "should have an object index");
800 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
801 ciObject* ciobj = get_unloaded_method_type_constant(signature);
802 return ciConstant(T_OBJECT, ciobj);
803 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
804 // must execute Java code to link this CP entry into cache[i].f1
805 assert(obj_index >= 0, "should have an object index");
806 bool ignore_will_link;
807 int ref_kind = cpool->method_handle_ref_kind_at(index);
808 int callee_index = cpool->method_handle_klass_index_at(index);
809 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
810 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
811 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
812 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
813 return ciConstant(T_OBJECT, ciobj);
814 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
815 assert(obj_index >= 0, "should have an object index");
816 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
817 } else {
818 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
819 return ciConstant();
820 }
821 }
822
823 // ------------------------------------------------------------------
824 // ciEnv::get_constant_by_index
825 //
826 // Pull a constant out of the constant pool. How appropriate.
827 //
828 // Implementation note: this query is currently in no way cached.
829 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
830 int pool_index, int cache_index,
831 ciInstanceKlass* accessor) {
832 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
833 }
834
835 // ------------------------------------------------------------------
836 // ciEnv::get_field_by_index_impl
837 //
838 // Implementation of get_field_by_index.
839 //
840 // Implementation note: the results of field lookups are cached
841 // in the accessor klass.
842 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
843 int index) {
844 ciConstantPoolCache* cache = accessor->field_cache();
845 if (cache == NULL) {
846 ciField* field = new (arena()) ciField(accessor, index);
847 return field;
848 } else {
849 ciField* field = (ciField*)cache->get(index);
850 if (field == NULL) {
851 field = new (arena()) ciField(accessor, index);
852 cache->insert(index, field);
853 }
854 return field;
855 }
856 }
857
858 // ------------------------------------------------------------------
859 // ciEnv::get_field_by_index
860 //
861 // Get a field by index from a klass's constant pool.
862 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
863 int index) {
864 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
865 }
866
867 // ------------------------------------------------------------------
868 // ciEnv::lookup_method
869 //
870 // Perform an appropriate method lookup based on accessor, holder,
871 // name, signature, and bytecode.
872 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
873 ciKlass* holder,
874 Symbol* name,
875 Symbol* sig,
876 Bytecodes::Code bc,
877 constantTag tag) {
878 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
879 Klass* holder_klass = holder->get_Klass();
880
881 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
882 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
883
884 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
885 LinkInfo::AccessCheck::required,
886 LinkInfo::LoaderConstraintCheck::required,
887 tag);
888 switch (bc) {
889 case Bytecodes::_invokestatic:
890 return LinkResolver::resolve_static_call_or_null(link_info);
891 case Bytecodes::_invokespecial:
892 return LinkResolver::resolve_special_call_or_null(link_info);
893 case Bytecodes::_invokeinterface:
894 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
895 case Bytecodes::_invokevirtual:
896 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
897 default:
898 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
899 return NULL; // silence compiler warnings
900 }
901 }
902
903
904 // ------------------------------------------------------------------
905 // ciEnv::get_method_by_index_impl
906 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
907 int index, Bytecodes::Code bc,
908 ciInstanceKlass* accessor) {
909 assert(cpool.not_null(), "need constant pool");
910 assert(accessor != NULL, "need origin of access");
911 if (bc == Bytecodes::_invokedynamic) {
912 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
913 bool is_resolved = !cpce->is_f1_null();
914 // FIXME: code generation could allow for null (unlinked) call site
915 // The call site could be made patchable as follows:
916 // Load the appendix argument from the constant pool.
917 // Test the appendix argument and jump to a known deopt routine if it is null.
918 // Jump through a patchable call site, which is initially a deopt routine.
919 // Patch the call site to the nmethod entry point of the static compiled lambda form.
920 // As with other two-component call sites, both values must be independently verified.
921
922 if (is_resolved) {
923 // Get the invoker Method* from the constant pool.
924 // (The appendix argument, if any, will be noted in the method's signature.)
925 Method* adapter = cpce->f1_as_method();
926 return get_method(adapter);
927 }
928
929 // Fake a method that is equivalent to a declared method.
930 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
931 ciSymbol* name = ciSymbols::invokeBasic_name();
932 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index));
933 return get_unloaded_method(holder, name, signature, accessor);
934 } else {
935 const int holder_index = cpool->klass_ref_index_at(index);
936 bool holder_is_accessible;
937 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
938
939 // Get the method's name and signature.
940 Symbol* name_sym = cpool->name_ref_at(index);
941 Symbol* sig_sym = cpool->signature_ref_at(index);
942
943 if (cpool->has_preresolution()
944 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
945 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
946 // Short-circuit lookups for JSR 292-related call sites.
947 // That is, do not rely only on name-based lookups, because they may fail
948 // if the names are not resolvable in the boot class loader (7056328).
949 switch (bc) {
950 case Bytecodes::_invokevirtual:
951 case Bytecodes::_invokeinterface:
952 case Bytecodes::_invokespecial:
953 case Bytecodes::_invokestatic:
954 {
955 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
956 if (m != NULL) {
957 return get_method(m);
958 }
959 }
960 break;
961 default:
962 break;
963 }
964 }
965
966 if (holder_is_accessible) { // Our declared holder is loaded.
967 constantTag tag = cpool->tag_ref_at(index);
968 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
969 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
970 if (m != NULL &&
971 (bc == Bytecodes::_invokestatic
972 ? m->method_holder()->is_not_initialized()
973 : !m->method_holder()->is_loaded())) {
974 m = NULL;
975 }
976 if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
977 m = NULL;
978 }
979 if (m != NULL) {
980 // We found the method.
981 return get_method(m);
982 }
983 }
984
985 // Either the declared holder was not loaded, or the method could
986 // not be found. Create a dummy ciMethod to represent the failed
987 // lookup.
988 ciSymbol* name = get_symbol(name_sym);
989 ciSymbol* signature = get_symbol(sig_sym);
990 return get_unloaded_method(holder, name, signature, accessor);
991 }
992 }
993
994
995 // ------------------------------------------------------------------
996 // ciEnv::get_instance_klass_for_declared_method_holder
997 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
998 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
999 // instead of a ciInstanceKlass. For that case simply pretend that the
1000 // declared holder is Object.clone since that's where the call will bottom out.
1001 // A more correct fix would trickle out through many interfaces in CI,
1002 // requiring ciInstanceKlass* to become ciKlass* and many more places would
1003 // require checks to make sure the expected type was found. Given that this
1004 // only occurs for clone() the more extensive fix seems like overkill so
1005 // instead we simply smear the array type into Object.
1006 guarantee(method_holder != NULL, "no method holder");
1007 if (method_holder->is_instance_klass()) {
1008 return method_holder->as_instance_klass();
1009 } else if (method_holder->is_array_klass()) {
1010 return current()->Object_klass();
1011 } else {
1012 ShouldNotReachHere();
1013 }
1014 return NULL;
1015 }
1016
1017
1018 // ------------------------------------------------------------------
1019 // ciEnv::get_method_by_index
1020 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
1021 int index, Bytecodes::Code bc,
1022 ciInstanceKlass* accessor) {
1023 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
1024 }
1025
1026
1027 // ------------------------------------------------------------------
1028 // ciEnv::name_buffer
1029 char *ciEnv::name_buffer(int req_len) {
1030 if (_name_buffer_len < req_len) {
1031 if (_name_buffer == NULL) {
1032 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
1033 _name_buffer_len = req_len;
1034 } else {
1035 _name_buffer =
1036 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
1037 _name_buffer_len = req_len;
1038 }
1039 }
1040 return _name_buffer;
1041 }
1042
1043 // ------------------------------------------------------------------
1044 // ciEnv::is_in_vm
1045 bool ciEnv::is_in_vm() {
1046 return JavaThread::current()->thread_state() == _thread_in_vm;
1047 }
1048
1049 // ------------------------------------------------------------------
1050 // ciEnv::validate_compile_task_dependencies
1051 //
1052 // Check for changes during compilation (e.g. class loads, evolution,
1053 // breakpoints, call site invalidation).
1054 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1055 if (failing()) return; // no need for further checks
1056
1057 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1058 if (result != Dependencies::end_marker) {
1059 if (result == Dependencies::call_site_target_value) {
1060 _inc_decompile_count_on_failure = false;
1061 record_failure("call site target change");
1062 } else if (Dependencies::is_klass_type(result)) {
1063 record_failure("concurrent class loading");
1064 } else {
1065 record_failure("invalid non-klass dependency");
1066 }
1067 }
1068 }
1069
1070 // ------------------------------------------------------------------
1071 // ciEnv::register_method
1072 void ciEnv::register_method(ciMethod* target,
1073 int entry_bci,
1074 CodeOffsets* offsets,
1075 int orig_pc_offset,
1076 CodeBuffer* code_buffer,
1077 int frame_words,
1078 OopMapSet* oop_map_set,
1079 ExceptionHandlerTable* handler_table,
1080 ImplicitExceptionTable* inc_table,
1081 AbstractCompiler* compiler,
1082 bool has_unsafe_access,
1083 bool has_wide_vectors,
1084 bool has_monitors,
1085 int immediate_oops_patched,
1086 RTMState rtm_state) {
1087 VM_ENTRY_MARK;
1088 nmethod* nm = NULL;
1089 {
1090 methodHandle method(THREAD, target->get_Method());
1091
1092 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1093 if (method->get_method_counters(THREAD) == NULL) {
1094 record_failure("can't create method counters");
1095 // All buffers in the CodeBuffer are allocated in the CodeCache.
1096 // If the code buffer is created on each compile attempt
1097 // as in C2, then it must be freed.
1098 code_buffer->free_blob();
1099 return;
1100 }
1101
1102 // Check if memory should be freed before allocation
1103 CodeCache::gc_on_allocation();
1104
1105 // To prevent compile queue updates.
1106 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1107
1108 // Prevent SystemDictionary::add_to_hierarchy from running
1109 // and invalidating our dependencies until we install this method.
1110 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1111 MutexLocker ml(Compile_lock);
1112 NoSafepointVerifier nsv;
1113
1114 // Change in Jvmti state may invalidate compilation.
1115 if (!failing() && jvmti_state_changed()) {
1116 record_failure("Jvmti state change invalidated dependencies");
1117 }
1118
1119 // Change in DTrace flags may invalidate compilation.
1120 if (!failing() &&
1121 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
1122 (!dtrace_method_probes() && DTraceMethodProbes) ||
1123 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1124 record_failure("DTrace flags change invalidated dependencies");
1125 }
1126
1127 if (!failing() && target->needs_clinit_barrier() &&
1128 target->holder()->is_in_error_state()) {
1129 record_failure("method holder is in error state");
1130 }
1131
1132 if (!failing()) {
1133 if (log() != NULL) {
1134 // Log the dependencies which this compilation declares.
1135 dependencies()->log_all_dependencies();
1136 }
1137
1138 // Encode the dependencies now, so we can check them right away.
1139 dependencies()->encode_content_bytes();
1140
1141 // Check for {class loads, evolution, breakpoints, ...} during compilation
1142 validate_compile_task_dependencies(target);
1143 }
1144 #if INCLUDE_RTM_OPT
1145 if (!failing() && (rtm_state != NoRTM) &&
1146 (method()->method_data() != NULL) &&
1147 (method()->method_data()->rtm_state() != rtm_state)) {
1148 // Preemptive decompile if rtm state was changed.
1149 record_failure("RTM state change invalidated rtm code");
1150 }
1151 #endif
1152
1153 if (!failing()) {
1154 code_buffer->finalize_stubs();
1155 }
1156
1157 if (failing()) {
1158 // While not a true deoptimization, it is a preemptive decompile.
1159 MethodData* mdo = method()->method_data();
1160 if (mdo != NULL && _inc_decompile_count_on_failure) {
1161 mdo->inc_decompile_count();
1162 }
1163
1164 // All buffers in the CodeBuffer are allocated in the CodeCache.
1165 // If the code buffer is created on each compile attempt
1166 // as in C2, then it must be freed.
1167 code_buffer->free_blob();
1168 return;
1169 }
1170
1171 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1172 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1173
1174 nm = nmethod::new_nmethod(method,
1175 compile_id(),
1176 entry_bci,
1177 offsets,
1178 orig_pc_offset,
1179 debug_info(), dependencies(), code_buffer,
1180 frame_words, oop_map_set,
1181 handler_table, inc_table,
1182 compiler, CompLevel(task()->comp_level()));
1183
1184 // Free codeBlobs
1185 code_buffer->free_blob();
1186
1187 if (nm != NULL) {
1188 nm->set_has_unsafe_access(has_unsafe_access);
1189 nm->set_has_wide_vectors(has_wide_vectors);
1190 nm->set_has_monitors(has_monitors);
1191 assert(!method->is_synchronized() || nm->has_monitors(), "");
1192 #if INCLUDE_RTM_OPT
1193 nm->set_rtm_state(rtm_state);
1194 #endif
1195
1196 if (entry_bci == InvocationEntryBci) {
1197 if (TieredCompilation) {
1198 // If there is an old version we're done with it
1199 CompiledMethod* old = method->code();
1200 if (TraceMethodReplacement && old != NULL) {
1201 ResourceMark rm;
1202 char *method_name = method->name_and_sig_as_C_string();
1203 tty->print_cr("Replacing method %s", method_name);
1204 }
1205 if (old != NULL) {
1206 old->make_not_used();
1207 }
1208 }
1209
1210 LogTarget(Info, nmethod, install) lt;
1211 if (lt.is_enabled()) {
1212 ResourceMark rm;
1213 char *method_name = method->name_and_sig_as_C_string();
1214 lt.print("Installing method (%d) %s ",
1215 task()->comp_level(), method_name);
1216 }
1217 // Allow the code to be executed
1218 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1219 if (nm->make_in_use()) {
1220 method->set_code(method, nm);
1221 }
1222 } else {
1223 LogTarget(Info, nmethod, install) lt;
1224 if (lt.is_enabled()) {
1225 ResourceMark rm;
1226 char *method_name = method->name_and_sig_as_C_string();
1227 lt.print("Installing osr method (%d) %s @ %d",
1228 task()->comp_level(), method_name, entry_bci);
1229 }
1230 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1231 if (nm->make_in_use()) {
1232 method->method_holder()->add_osr_nmethod(nm);
1233 }
1234 }
1235 }
1236 }
1237
1238 NoSafepointVerifier nsv;
1239 if (nm != NULL) {
1240 // Compilation succeeded, post what we know about it
1241 nm->post_compiled_method(task());
1242 task()->set_num_inlined_bytecodes(num_inlined_bytecodes());
1243 } else {
1244 // The CodeCache is full.
1245 record_failure("code cache is full");
1246 }
1247
1248 // safepoints are allowed again
1249 }
1250
1251 // ------------------------------------------------------------------
1252 // ciEnv::find_system_klass
1253 ciKlass* ciEnv::find_system_klass(ciSymbol* klass_name) {
1254 VM_ENTRY_MARK;
1255 return get_klass_by_name_impl(NULL, constantPoolHandle(), klass_name, false);
1256 }
1257
1258 // ------------------------------------------------------------------
1259 // ciEnv::comp_level
1260 int ciEnv::comp_level() {
1261 if (task() == NULL) return CompilationPolicy::highest_compile_level();
1262 return task()->comp_level();
1263 }
1264
1265 // ------------------------------------------------------------------
1266 // ciEnv::compile_id
1267 uint ciEnv::compile_id() {
1268 if (task() == NULL) return 0;
1269 return task()->compile_id();
1270 }
1271
1272 // ------------------------------------------------------------------
1273 // ciEnv::notice_inlined_method()
1274 void ciEnv::notice_inlined_method(ciMethod* method) {
1275 _num_inlined_bytecodes += method->code_size_for_inlining();
1276 }
1277
1278 // ------------------------------------------------------------------
1279 // ciEnv::num_inlined_bytecodes()
1280 int ciEnv::num_inlined_bytecodes() const {
1281 return _num_inlined_bytecodes;
1282 }
1283
1284 // ------------------------------------------------------------------
1285 // ciEnv::record_failure()
1286 void ciEnv::record_failure(const char* reason) {
1287 if (_failure_reason == NULL) {
1288 // Record the first failure reason.
1289 _failure_reason = reason;
1290 }
1291 }
1292
1293 void ciEnv::report_failure(const char* reason) {
1294 EventCompilationFailure event;
1295 if (event.should_commit()) {
1296 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1297 }
1298 }
1299
1300 // ------------------------------------------------------------------
1301 // ciEnv::record_method_not_compilable()
1302 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1303 int new_compilable =
1304 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1305
1306 // Only note transitions to a worse state
1307 if (new_compilable > _compilable) {
1308 if (log() != NULL) {
1309 if (all_tiers) {
1310 log()->elem("method_not_compilable");
1311 } else {
1312 log()->elem("method_not_compilable_at_tier level='%d'",
1313 current()->task()->comp_level());
1314 }
1315 }
1316 _compilable = new_compilable;
1317
1318 // Reset failure reason; this one is more important.
1319 _failure_reason = NULL;
1320 record_failure(reason);
1321 }
1322 }
1323
1324 // ------------------------------------------------------------------
1325 // ciEnv::record_out_of_memory_failure()
1326 void ciEnv::record_out_of_memory_failure() {
1327 // If memory is low, we stop compiling methods.
1328 record_method_not_compilable("out of memory");
1329 }
1330
1331 ciInstance* ciEnv::unloaded_ciinstance() {
1332 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1333 }
1334
1335 // ------------------------------------------------------------------
1336 // Replay support
1337
1338
1339 // Lookup location descriptor for the class, if any.
1340 // Returns false if not found.
1341 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1342 bool found = false;
1343 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1344 if (!found) {
1345 return false;
1346 }
1347 loc = _dyno_locs->at(pos);
1348 return found;
1349 }
1350
1351 // Associate the current location descriptor with the given class and record for later lookup.
1352 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1353 const char *loc = os::strdup(_dyno_name);
1354 bool found = false;
1355 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1356 if (found) {
1357 _dyno_locs->at_put(pos, loc);
1358 } else {
1359 _dyno_klasses->insert_before(pos, ik);
1360 _dyno_locs->insert_before(pos, loc);
1361 }
1362 }
1363
1364 // Associate the current location descriptor with the given class and record for later lookup.
1365 // If it turns out that there are multiple locations for the given class, that conflict should
1366 // be handled here. Currently we choose the first location found.
1367 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1368 if (!ik->is_hidden()) {
1369 return;
1370 }
1371 const char *loc0;
1372 if (dyno_loc(ik, loc0)) {
1373 // TODO: found multiple references, see if we can improve
1374 if (Verbose) {
1375 tty->print_cr("existing call site @ %s for %s",
1376 loc0, ik->external_name());
1377 }
1378 } else {
1379 set_dyno_loc(ik);
1380 }
1381 }
1382
1383 // Look up the location descriptor for the given class and print it to the output stream.
1384 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1385 const char *loc;
1386 if (dyno_loc(ik, loc)) {
1387 out->print("%s", loc);
1388 return true;
1389 } else {
1390 return false;
1391 }
1392 }
1393
1394 // Look up the location descriptor for the given class and return it as a string.
1395 // Returns NULL if no location is found.
1396 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1397 if (ik->is_hidden()) {
1398 stringStream ss;
1399 if (print_dyno_loc(&ss, ik)) {
1400 ss.print(" ;"); // add terminator
1401 const char* call_site = ss.as_string();
1402 return call_site;
1403 }
1404 }
1405 return NULL;
1406 }
1407
1408 // Look up the location descriptor for the given class and return it as a string.
1409 // Returns the class name as a fallback if no location is found.
1410 const char *ciEnv::replay_name(ciKlass* k) const {
1411 if (k->is_instance_klass()) {
1412 return replay_name(k->as_instance_klass()->get_instanceKlass());
1413 }
1414 return k->name()->as_quoted_ascii();
1415 }
1416
1417 // Look up the location descriptor for the given class and return it as a string.
1418 // Returns the class name as a fallback if no location is found.
1419 const char *ciEnv::replay_name(const InstanceKlass* ik) const {
1420 const char* name = dyno_name(ik);
1421 if (name != NULL) {
1422 return name;
1423 }
1424 return ik->name()->as_quoted_ascii();
1425 }
1426
1427 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1428 void ciEnv::record_member(Thread* thread, oop member) {
1429 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1430 // Check MemberName.clazz field
1431 oop clazz = java_lang_invoke_MemberName::clazz(member);
1432 if (clazz->klass()->is_instance_klass()) {
1433 RecordLocation fp(this, "clazz");
1434 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1435 record_best_dyno_loc(ik);
1436 }
1437 // Check MemberName.method.vmtarget field
1438 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1439 if (vmtarget != NULL) {
1440 RecordLocation fp2(this, "<vmtarget>");
1441 InstanceKlass* ik = vmtarget->method_holder();
1442 record_best_dyno_loc(ik);
1443 }
1444 }
1445
1446 // Read an object field. Lookup is done by name only.
1447 static inline oop obj_field(oop obj, const char* name) {
1448 return ciReplay::obj_field(obj, name);
1449 }
1450
1451 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1452 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1453 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1454
1455 {
1456 // Check LambdaForm.vmentry field
1457 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1458 RecordLocation fp0(this, "vmentry");
1459 record_member(thread, member);
1460 }
1461
1462 // Check LambdaForm.names array
1463 objArrayOop names = (objArrayOop)obj_field(form, "names");
1464 if (names != NULL) {
1465 RecordLocation lp0(this, "names");
1466 int len = names->length();
1467 for (int i = 0; i < len; ++i) {
1468 oop name = names->obj_at(i);
1469 RecordLocation lp1(this, "%d", i);
1470 // Check LambdaForm.names[i].function field
1471 RecordLocation lp2(this, "function");
1472 oop function = obj_field(name, "function");
1473 if (function != NULL) {
1474 // Check LambdaForm.names[i].function.member field
1475 oop member = obj_field(function, "member");
1476 if (member != NULL) {
1477 RecordLocation lp3(this, "member");
1478 record_member(thread, member);
1479 }
1480 // Check LambdaForm.names[i].function.resolvedHandle field
1481 oop mh = obj_field(function, "resolvedHandle");
1482 if (mh != NULL) {
1483 RecordLocation lp3(this, "resolvedHandle");
1484 record_mh(thread, mh);
1485 }
1486 // Check LambdaForm.names[i].function.invoker field
1487 oop invoker = obj_field(function, "invoker");
1488 if (invoker != NULL) {
1489 RecordLocation lp3(this, "invoker");
1490 record_mh(thread, invoker);
1491 }
1492 }
1493 }
1494 }
1495 }
1496
1497 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1498 void ciEnv::record_mh(Thread* thread, oop mh) {
1499 {
1500 // Check MethodHandle.form field
1501 oop form = java_lang_invoke_MethodHandle::form(mh);
1502 RecordLocation fp(this, "form");
1503 record_lambdaform(thread, form);
1504 }
1505 // Check DirectMethodHandle.member field
1506 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1507 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1508 RecordLocation fp(this, "member");
1509 record_member(thread, member);
1510 } else {
1511 // Check <MethodHandle subclass>.argL<n> fields
1512 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1513 char arg_name[] = "argLXX";
1514 int max_arg = 99;
1515 for (int index = 0; index <= max_arg; ++index) {
1516 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1517 oop arg = obj_field(mh, arg_name);
1518 if (arg != NULL) {
1519 RecordLocation fp(this, "%s", arg_name);
1520 if (arg->klass()->is_instance_klass()) {
1521 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1522 record_best_dyno_loc(ik2);
1523 record_call_site_obj(thread, arg);
1524 }
1525 } else {
1526 break;
1527 }
1528 }
1529 }
1530 }
1531
1532 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1533 // Types currently supported are MethodHandle and CallSite.
1534 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1535 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1536 {
1537 if (obj != NULL) {
1538 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1539 record_mh(thread, obj);
1540 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1541 oop target = java_lang_invoke_CallSite::target(obj);
1542 if (target->klass()->is_instance_klass()) {
1543 RecordLocation fp(this, "target");
1544 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1545 record_best_dyno_loc(ik);
1546 }
1547 }
1548 }
1549 }
1550
1551 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1552 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1553 InstanceKlass* holder = adapter->method_holder();
1554 if (!holder->is_hidden()) {
1555 return;
1556 }
1557 RecordLocation fp(this, "<adapter>");
1558 record_best_dyno_loc(holder);
1559 }
1560
1561 // Process an invokedynamic call site and record any dynamic locations.
1562 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1563 ConstantPoolCacheEntry* cp_cache_entry = cp->invokedynamic_cp_cache_entry_at(indy_index);
1564 if (cp_cache_entry->is_resolved(Bytecodes::_invokedynamic)) {
1565 // process the adapter
1566 Method* adapter = cp_cache_entry->f1_as_method();
1567 record_call_site_method(thread, adapter);
1568 // process the appendix
1569 oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1570 {
1571 RecordLocation fp(this, "<appendix>");
1572 record_call_site_obj(thread, appendix);
1573 }
1574 // process the BSM
1575 int pool_index = cp_cache_entry->constant_pool_index();
1576 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1577 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1578 {
1579 RecordLocation fp(this, "<bsm>");
1580 record_call_site_obj(thread, bsm);
1581 }
1582 }
1583 }
1584
1585 // Process an invokehandle call site and record any dynamic locations.
1586 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1587 const int holder_index = cp->klass_ref_index_at(index);
1588 if (!cp->tag_at(holder_index).is_klass()) {
1589 return; // not resolved
1590 }
1591 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1592 Symbol* name = cp->name_ref_at(index);
1593 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1594 ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
1595 if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) {
1596 // process the adapter
1597 Method* adapter = cp_cache_entry->f1_as_method();
1598 oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1599 record_call_site_method(thread, adapter);
1600 // process the appendix
1601 {
1602 RecordLocation fp(this, "<appendix>");
1603 record_call_site_obj(thread, appendix);
1604 }
1605 }
1606 }
1607 }
1608
1609 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1610 // constant pool entries and record for future lookup.
1611 void ciEnv::find_dynamic_call_sites() {
1612 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, NULL);
1613 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, NULL);
1614
1615 // Iterate over the class hierarchy
1616 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1617 Klass* sub = iter.klass();
1618 if (sub->is_instance_klass()) {
1619 InstanceKlass *isub = InstanceKlass::cast(sub);
1620 InstanceKlass* ik = isub;
1621 if (!ik->is_linked()) {
1622 continue;
1623 }
1624 if (ik->is_hidden()) {
1625 continue;
1626 }
1627 JavaThread* thread = JavaThread::current();
1628 const constantPoolHandle pool(thread, ik->constants());
1629
1630 // Look for invokedynamic/invokehandle call sites
1631 for (int i = 0; i < ik->methods()->length(); ++i) {
1632 Method* m = ik->methods()->at(i);
1633
1634 BytecodeStream bcs(methodHandle(thread, m));
1635 while (!bcs.is_last_bytecode()) {
1636 Bytecodes::Code opcode = bcs.next();
1637 opcode = bcs.raw_code();
1638 switch (opcode) {
1639 case Bytecodes::_invokedynamic:
1640 case Bytecodes::_invokehandle: {
1641 RecordLocation fp(this, "@bci %s %s %s %d",
1642 ik->name()->as_quoted_ascii(),
1643 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1644 bcs.bci());
1645 if (opcode == Bytecodes::_invokedynamic) {
1646 int index = bcs.get_index_u4();
1647 process_invokedynamic(pool, index, thread);
1648 } else {
1649 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1650 int cp_cache_index = bcs.get_index_u2_cpcache();
1651 process_invokehandle(pool, cp_cache_index, thread);
1652 }
1653 break;
1654 }
1655 default:
1656 break;
1657 }
1658 }
1659 }
1660
1661 // Look for MethodHandle constant pool entries
1662 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1663 int len = pool->length();
1664 for (int i = 0; i < len; ++i) {
1665 if (pool->tag_at(i).is_method_handle()) {
1666 bool found_it;
1667 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1668 if (mh != NULL) {
1669 RecordLocation fp(this, "%d", i);
1670 record_mh(thread, mh);
1671 }
1672 }
1673 }
1674 }
1675 }
1676 }
1677
1678 void ciEnv::dump_compile_data(outputStream* out) {
1679 CompileTask* task = this->task();
1680 if (task) {
1681 #ifdef COMPILER2
1682 if (ReplayReduce && compiler_data() != NULL) {
1683 // Dump C2 "reduced" inlining data.
1684 ((Compile*)compiler_data())->dump_inline_data_reduced(out);
1685 }
1686 #endif
1687 Method* method = task->method();
1688 int entry_bci = task->osr_bci();
1689 int comp_level = task->comp_level();
1690 out->print("compile ");
1691 get_method(method)->dump_name_as_ascii(out);
1692 out->print(" %d %d", entry_bci, comp_level);
1693 if (compiler_data() != NULL) {
1694 if (is_c2_compile(comp_level)) {
1695 #ifdef COMPILER2
1696 // Dump C2 inlining data.
1697 ((Compile*)compiler_data())->dump_inline_data(out);
1698 #endif
1699 } else if (is_c1_compile(comp_level)) {
1700 #ifdef COMPILER1
1701 // Dump C1 inlining data.
1702 ((Compilation*)compiler_data())->dump_inline_data(out);
1703 #endif
1704 }
1705 }
1706 out->cr();
1707 }
1708 }
1709
1710 // Called from VM error reporter, so be careful.
1711 // Don't safepoint or acquire any locks.
1712 //
1713 void ciEnv::dump_replay_data_helper(outputStream* out) {
1714 NoSafepointVerifier no_safepoint;
1715 ResourceMark rm;
1716
1717 out->print_cr("version %d", REPLAY_VERSION);
1718 #if INCLUDE_JVMTI
1719 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1720 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1721 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1722 #endif // INCLUDE_JVMTI
1723
1724 find_dynamic_call_sites();
1725
1726 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1727 out->print_cr("# %d ciObject found", objects->length());
1728
1729 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1730 // protection domain to load subsequent classes during replay compilation.
1731 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1732
1733 for (int i = 0; i < objects->length(); i++) {
1734 objects->at(i)->dump_replay_data(out);
1735 }
1736 dump_compile_data(out);
1737 out->flush();
1738 }
1739
1740 // Called from VM error reporter, so be careful.
1741 // Don't safepoint or acquire any locks.
1742 //
1743 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1744 GUARDED_VM_ENTRY(
1745 dump_replay_data_helper(out);
1746 )
1747 }
1748
1749 void ciEnv::dump_replay_data(outputStream* out) {
1750 GUARDED_VM_ENTRY(
1751 MutexLocker ml(Compile_lock);
1752 dump_replay_data_helper(out);
1753 )
1754 }
1755
1756 void ciEnv::dump_replay_data(int compile_id) {
1757 char buffer[64];
1758 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1759 if (ret > 0) {
1760 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1761 if (fd != -1) {
1762 FILE* replay_data_file = os::fdopen(fd, "w");
1763 if (replay_data_file != NULL) {
1764 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1765 dump_replay_data(&replay_data_stream);
1766 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1767 } else {
1768 tty->print_cr("# Can't open file to dump replay data.");
1769 }
1770 }
1771 }
1772 }
1773
1774 void ciEnv::dump_inline_data(int compile_id) {
1775 char buffer[64];
1776 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1777 if (ret > 0) {
1778 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1779 if (fd != -1) {
1780 FILE* inline_data_file = os::fdopen(fd, "w");
1781 if (inline_data_file != NULL) {
1782 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1783 GUARDED_VM_ENTRY(
1784 MutexLocker ml(Compile_lock);
1785 dump_compile_data(&replay_data_stream);
1786 )
1787 replay_data_stream.flush();
1788 tty->print("# Compiler inline data is saved as: ");
1789 tty->print_cr("%s", buffer);
1790 } else {
1791 tty->print_cr("# Can't open file to dump inline data.");
1792 }
1793 }
1794 }
1795 }