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/symbolTable.hpp"
41 #include "classfile/systemDictionary.hpp"
42 #include "classfile/vmClasses.hpp"
43 #include "classfile/vmSymbols.hpp"
44 #include "code/codeCache.hpp"
45 #include "code/scopeDesc.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 "prims/jvmtiExport.hpp"
69 #include "prims/methodHandles.hpp"
70 #include "runtime/fieldDescriptor.inline.hpp"
71 #include "runtime/handles.inline.hpp"
72 #include "runtime/init.hpp"
73 #include "runtime/reflection.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/safepointVerifiers.hpp"
76 #include "runtime/sharedRuntime.hpp"
77 #include "runtime/thread.inline.hpp"
78 #include "utilities/dtrace.hpp"
79 #include "utilities/macros.hpp"
80 #ifdef COMPILER1
81 #include "c1/c1_Runtime1.hpp"
82 #endif
83 #ifdef COMPILER2
84 #include "opto/runtime.hpp"
85 #endif
86
87 // ciEnv
88 //
89 // This class is the top level broker for requests from the compiler
90 // to the VM.
91
92 ciObject* ciEnv::_null_object_instance;
93
94 #define VM_CLASS_DEFN(name, ignore_s) ciInstanceKlass* ciEnv::_##name = NULL;
95 VM_CLASSES_DO(VM_CLASS_DEFN)
96 #undef VM_CLASS_DEFN
97
98 ciSymbol* ciEnv::_unloaded_cisymbol = NULL;
99 ciInstanceKlass* ciEnv::_unloaded_ciinstance_klass = NULL;
100 ciObjArrayKlass* ciEnv::_unloaded_ciobjarrayklass = NULL;
101
102 jobject ciEnv::_ArrayIndexOutOfBoundsException_handle = NULL;
103 jobject ciEnv::_ArrayStoreException_handle = NULL;
104 jobject ciEnv::_ClassCastException_handle = NULL;
105
106 #ifndef PRODUCT
107 static bool firstEnv = true;
108 #endif /* PRODUCT */
109
110 // ------------------------------------------------------------------
111 // ciEnv::ciEnv
112 ciEnv::ciEnv(CompileTask* task)
113 : _ciEnv_arena(mtCompiler) {
114 VM_ENTRY_MARK;
115
116 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
117 thread->set_env(this);
118 assert(ciEnv::current() == this, "sanity");
119
120 _oop_recorder = NULL;
121 _debug_info = NULL;
122 _dependencies = NULL;
123 _failure_reason = NULL;
124 _inc_decompile_count_on_failure = true;
125 _compilable = MethodCompilable;
126 _break_at_compile = false;
127 _compiler_data = NULL;
128 #ifndef PRODUCT
129 assert(!firstEnv, "not initialized properly");
130 #endif /* !PRODUCT */
131
132 _num_inlined_bytecodes = 0;
133 assert(task == NULL || thread->task() == task, "sanity");
134 if (task != NULL) {
135 task->mark_started(os::elapsed_counter());
136 }
137 _task = task;
138 _log = NULL;
139
140 // Temporary buffer for creating symbols and such.
141 _name_buffer = NULL;
142 _name_buffer_len = 0;
143
144 _arena = &_ciEnv_arena;
145 _factory = new (_arena) ciObjectFactory(_arena, 128);
146
147 // Preload commonly referenced system ciObjects.
148
149 // During VM initialization, these instances have not yet been created.
150 // Assertions ensure that these instances are not accessed before
151 // their initialization.
152
153 assert(Universe::is_fully_initialized(), "should be complete");
154
155 oop o = Universe::null_ptr_exception_instance();
156 assert(o != NULL, "should have been initialized");
157 _NullPointerException_instance = get_object(o)->as_instance();
158 o = Universe::arithmetic_exception_instance();
159 assert(o != NULL, "should have been initialized");
160 _ArithmeticException_instance = get_object(o)->as_instance();
161
162 _ArrayIndexOutOfBoundsException_instance = NULL;
163 _ArrayStoreException_instance = NULL;
164 _ClassCastException_instance = NULL;
165 _the_null_string = NULL;
166 _the_min_jint_string = NULL;
167
168 _jvmti_redefinition_count = 0;
169 _jvmti_can_hotswap_or_post_breakpoint = false;
170 _jvmti_can_access_local_variables = false;
171 _jvmti_can_post_on_exceptions = false;
172 _jvmti_can_pop_frame = false;
173
174 _dyno_klasses = NULL;
175 _dyno_locs = NULL;
176 _dyno_name[0] = '\0';
177 }
178
179 // Record components of a location descriptor string. Components are appended by the constructor and
180 // removed by the destructor, like a stack, so scope matters. These location descriptors are used to
181 // locate dynamic classes, and terminate at a Method* or oop field associated with dynamic/hidden class.
182 //
183 // Example use:
184 //
185 // {
186 // RecordLocation fp(this, "field1");
187 // // location: "field1"
188 // { RecordLocation fp(this, " field2"); // location: "field1 field2" }
189 // // location: "field1"
190 // { RecordLocation fp(this, " field3"); // location: "field1 field3" }
191 // // location: "field1"
192 // }
193 // // location: ""
194 //
195 // Examples of actual locations
196 // @bci compiler/ciReplay/CiReplayBase$TestMain test (I)V 1 <appendix> argL0 ;
197 // // resolve invokedynamic at bci 1 of TestMain.test, then read field "argL0" from appendix
198 // @bci compiler/ciReplay/CiReplayBase$TestMain main ([Ljava/lang/String;)V 0 <appendix> form vmentry <vmtarget> ;
199 // // resolve invokedynamic at bci 0 of TestMain.main, then read field "form.vmentry.method.vmtarget" from appendix
200 // @cpi compiler/ciReplay/CiReplayBase$TestMain 56 form vmentry <vmtarget> ;
201 // // resolve MethodHandle at cpi 56 of TestMain, then read field "vmentry.method.vmtarget" from resolved MethodHandle
202 class RecordLocation {
203 private:
204 char* end;
205
206 ATTRIBUTE_PRINTF(3, 4)
207 void push(ciEnv* ci, const char* fmt, ...) {
208 va_list args;
209 va_start(args, fmt);
210 push_va(ci, fmt, args);
211 va_end(args);
212 }
213
214 public:
215 ATTRIBUTE_PRINTF(3, 0)
216 void push_va(ciEnv* ci, const char* fmt, va_list args) {
217 char *e = ci->_dyno_name + strlen(ci->_dyno_name);
218 char *m = ci->_dyno_name + ARRAY_SIZE(ci->_dyno_name) - 1;
219 os::vsnprintf(e, m - e, fmt, args);
220 assert(strlen(ci->_dyno_name) < (ARRAY_SIZE(ci->_dyno_name) - 1), "overflow");
221 }
222
223 // append a new component
224 ATTRIBUTE_PRINTF(3, 4)
225 RecordLocation(ciEnv* ci, const char* fmt, ...) {
226 end = ci->_dyno_name + strlen(ci->_dyno_name);
227 va_list args;
228 va_start(args, fmt);
229 push(ci, " ");
230 push_va(ci, fmt, args);
231 va_end(args);
232 }
233
234 // reset to previous state
235 ~RecordLocation() {
236 *end = '\0';
237 }
238 };
239
240 ciEnv::ciEnv(Arena* arena) : _ciEnv_arena(mtCompiler) {
241 ASSERT_IN_VM;
242
243 // Set up ciEnv::current immediately, for the sake of ciObjectFactory, etc.
244 CompilerThread* current_thread = CompilerThread::current();
245 assert(current_thread->env() == NULL, "must be");
246 current_thread->set_env(this);
247 assert(ciEnv::current() == this, "sanity");
248
249 _oop_recorder = NULL;
250 _debug_info = NULL;
251 _dependencies = NULL;
252 _failure_reason = NULL;
253 _inc_decompile_count_on_failure = true;
254 _compilable = MethodCompilable_never;
255 _break_at_compile = false;
256 _compiler_data = NULL;
257 #ifndef PRODUCT
258 assert(firstEnv, "must be first");
259 firstEnv = false;
260 #endif /* !PRODUCT */
261
262 _num_inlined_bytecodes = 0;
263 _task = NULL;
264 _log = NULL;
265
266 // Temporary buffer for creating symbols and such.
267 _name_buffer = NULL;
268 _name_buffer_len = 0;
269
270 _arena = arena;
271 _factory = new (_arena) ciObjectFactory(_arena, 128);
272
273 // Preload commonly referenced system ciObjects.
274
275 // During VM initialization, these instances have not yet been created.
276 // Assertions ensure that these instances are not accessed before
277 // their initialization.
278
279 assert(Universe::is_fully_initialized(), "must be");
280
281 _NullPointerException_instance = NULL;
282 _ArithmeticException_instance = NULL;
283 _ArrayIndexOutOfBoundsException_instance = NULL;
284 _ArrayStoreException_instance = NULL;
285 _ClassCastException_instance = NULL;
286 _the_null_string = NULL;
287 _the_min_jint_string = NULL;
288
289 _jvmti_redefinition_count = 0;
290 _jvmti_can_hotswap_or_post_breakpoint = false;
291 _jvmti_can_access_local_variables = false;
292 _jvmti_can_post_on_exceptions = false;
293 _jvmti_can_pop_frame = false;
294
295 _dyno_klasses = NULL;
296 _dyno_locs = NULL;
297 }
298
299 ciEnv::~ciEnv() {
300 GUARDED_VM_ENTRY(
301 CompilerThread* current_thread = CompilerThread::current();
302 _factory->remove_symbols();
303 // Need safepoint to clear the env on the thread. RedefineClasses might
304 // be reading it.
305 current_thread->set_env(NULL);
306 )
307 }
308
309 // ------------------------------------------------------------------
310 // Cache Jvmti state
311 bool ciEnv::cache_jvmti_state() {
312 VM_ENTRY_MARK;
313 // Get Jvmti capabilities under lock to get consistant values.
314 MutexLocker mu(JvmtiThreadState_lock);
315 _jvmti_redefinition_count = JvmtiExport::redefinition_count();
316 _jvmti_can_hotswap_or_post_breakpoint = JvmtiExport::can_hotswap_or_post_breakpoint();
317 _jvmti_can_access_local_variables = JvmtiExport::can_access_local_variables();
318 _jvmti_can_post_on_exceptions = JvmtiExport::can_post_on_exceptions();
319 _jvmti_can_pop_frame = JvmtiExport::can_pop_frame();
320 _jvmti_can_get_owned_monitor_info = JvmtiExport::can_get_owned_monitor_info();
321 _jvmti_can_walk_any_space = JvmtiExport::can_walk_any_space();
322 return _task != NULL && _task->method()->is_old();
323 }
324
325 bool ciEnv::jvmti_state_changed() const {
326 // Some classes were redefined
327 if (_jvmti_redefinition_count != JvmtiExport::redefinition_count()) {
328 return true;
329 }
330
331 if (!_jvmti_can_access_local_variables &&
332 JvmtiExport::can_access_local_variables()) {
333 return true;
334 }
335 if (!_jvmti_can_hotswap_or_post_breakpoint &&
336 JvmtiExport::can_hotswap_or_post_breakpoint()) {
337 return true;
338 }
339 if (!_jvmti_can_post_on_exceptions &&
340 JvmtiExport::can_post_on_exceptions()) {
341 return true;
342 }
343 if (!_jvmti_can_pop_frame &&
344 JvmtiExport::can_pop_frame()) {
345 return true;
346 }
347 if (!_jvmti_can_get_owned_monitor_info &&
348 JvmtiExport::can_get_owned_monitor_info()) {
349 return true;
350 }
351 if (!_jvmti_can_walk_any_space &&
352 JvmtiExport::can_walk_any_space()) {
353 return true;
354 }
355
356 return false;
357 }
358
359 // ------------------------------------------------------------------
360 // Cache DTrace flags
361 void ciEnv::cache_dtrace_flags() {
362 // Need lock?
363 _dtrace_extended_probes = ExtendedDTraceProbes;
364 if (_dtrace_extended_probes) {
365 _dtrace_method_probes = true;
366 _dtrace_alloc_probes = true;
367 } else {
368 _dtrace_method_probes = DTraceMethodProbes;
369 _dtrace_alloc_probes = DTraceAllocProbes;
370 }
371 }
372
373 // ------------------------------------------------------------------
374 // helper for lazy exception creation
375 ciInstance* ciEnv::get_or_create_exception(jobject& handle, Symbol* name) {
376 VM_ENTRY_MARK;
377 if (handle == NULL) {
378 // Cf. universe.cpp, creation of Universe::_null_ptr_exception_instance.
379 InstanceKlass* ik = SystemDictionary::find_instance_klass(name, Handle(), Handle());
380 jobject objh = NULL;
381 if (ik != NULL) {
382 oop obj = ik->allocate_instance(THREAD);
383 if (!HAS_PENDING_EXCEPTION)
384 objh = JNIHandles::make_global(Handle(THREAD, obj));
385 }
386 if (HAS_PENDING_EXCEPTION) {
387 CLEAR_PENDING_EXCEPTION;
388 } else {
389 handle = objh;
390 }
391 }
392 oop obj = JNIHandles::resolve(handle);
393 return obj == NULL? NULL: get_object(obj)->as_instance();
394 }
395
396 ciInstanceKlass* ciEnv::get_box_klass_for_primitive_type(BasicType type) {
397 switch (type) {
398 case T_BOOLEAN: return Boolean_klass();
399 case T_BYTE : return Byte_klass();
400 case T_CHAR : return Character_klass();
401 case T_SHORT : return Short_klass();
402 case T_INT : return Integer_klass();
403 case T_LONG : return Long_klass();
404 case T_FLOAT : return Float_klass();
405 case T_DOUBLE : return Double_klass();
406
407 default:
408 assert(false, "not a primitive: %s", type2name(type));
409 return NULL;
410 }
411 }
412
413 ciInstance* ciEnv::ArrayIndexOutOfBoundsException_instance() {
414 if (_ArrayIndexOutOfBoundsException_instance == NULL) {
415 _ArrayIndexOutOfBoundsException_instance
416 = get_or_create_exception(_ArrayIndexOutOfBoundsException_handle,
417 vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
418 }
419 return _ArrayIndexOutOfBoundsException_instance;
420 }
421 ciInstance* ciEnv::ArrayStoreException_instance() {
422 if (_ArrayStoreException_instance == NULL) {
423 _ArrayStoreException_instance
424 = get_or_create_exception(_ArrayStoreException_handle,
425 vmSymbols::java_lang_ArrayStoreException());
426 }
427 return _ArrayStoreException_instance;
428 }
429 ciInstance* ciEnv::ClassCastException_instance() {
430 if (_ClassCastException_instance == NULL) {
431 _ClassCastException_instance
432 = get_or_create_exception(_ClassCastException_handle,
433 vmSymbols::java_lang_ClassCastException());
434 }
435 return _ClassCastException_instance;
436 }
437
438 ciInstance* ciEnv::the_null_string() {
439 if (_the_null_string == NULL) {
440 VM_ENTRY_MARK;
441 _the_null_string = get_object(Universe::the_null_string())->as_instance();
442 }
443 return _the_null_string;
444 }
445
446 ciInstance* ciEnv::the_min_jint_string() {
447 if (_the_min_jint_string == NULL) {
448 VM_ENTRY_MARK;
449 _the_min_jint_string = get_object(Universe::the_min_jint_string())->as_instance();
450 }
451 return _the_min_jint_string;
452 }
453
454 // ------------------------------------------------------------------
455 // ciEnv::get_method_from_handle
456 ciMethod* ciEnv::get_method_from_handle(Method* method) {
457 VM_ENTRY_MARK;
458 return get_metadata(method)->as_method();
459 }
460
461 // ------------------------------------------------------------------
462 // ciEnv::check_klass_accessiblity
463 //
464 // Note: the logic of this method should mirror the logic of
465 // ConstantPool::verify_constant_pool_resolve.
466 bool ciEnv::check_klass_accessibility(ciKlass* accessing_klass,
467 Klass* resolved_klass) {
468 if (accessing_klass == NULL || !accessing_klass->is_loaded()) {
469 return true;
470 }
471 if (accessing_klass->is_obj_array_klass()) {
472 accessing_klass = accessing_klass->as_obj_array_klass()->base_element_klass();
473 }
474 if (!accessing_klass->is_instance_klass()) {
475 return true;
476 }
477
478 if (resolved_klass->is_objArray_klass()) {
479 // Find the element klass, if this is an array.
480 resolved_klass = ObjArrayKlass::cast(resolved_klass)->bottom_klass();
481 }
482 if (resolved_klass->is_instance_klass()) {
483 return (Reflection::verify_class_access(accessing_klass->get_Klass(),
484 InstanceKlass::cast(resolved_klass),
485 true) == Reflection::ACCESS_OK);
486 }
487 return true;
488 }
489
490 // ------------------------------------------------------------------
491 // ciEnv::get_klass_by_name_impl
492 ciKlass* ciEnv::get_klass_by_name_impl(ciKlass* accessing_klass,
493 const constantPoolHandle& cpool,
494 ciSymbol* name,
495 bool require_local) {
496 ASSERT_IN_VM;
497 Thread* current = Thread::current();
498
499 // Now we need to check the SystemDictionary
500 Symbol* sym = name->get_symbol();
501 if (Signature::has_envelope(sym)) {
502 // This is a name from a signature. Strip off the trimmings.
503 // Call recursive to keep scope of strippedsym.
504 TempNewSymbol strippedsym = Signature::strip_envelope(sym);
505 ciSymbol* strippedname = get_symbol(strippedsym);
506 return get_klass_by_name_impl(accessing_klass, cpool, strippedname, require_local);
507 }
508
509 // Check for prior unloaded klass. The SystemDictionary's answers
510 // can vary over time but the compiler needs consistency.
511 ciKlass* unloaded_klass = check_get_unloaded_klass(accessing_klass, name);
512 if (unloaded_klass != NULL) {
513 if (require_local) return NULL;
514 return unloaded_klass;
515 }
516
517 Handle loader;
518 Handle domain;
519 if (accessing_klass != NULL) {
520 loader = Handle(current, accessing_klass->loader());
521 domain = Handle(current, accessing_klass->protection_domain());
522 }
523
524 Klass* found_klass;
525 {
526 ttyUnlocker ttyul; // release tty lock to avoid ordering problems
527 MutexLocker ml(current, Compile_lock);
528 Klass* kls;
529 if (!require_local) {
530 kls = SystemDictionary::find_constrained_instance_or_array_klass(current, sym, loader);
531 } else {
532 kls = SystemDictionary::find_instance_or_array_klass(sym, loader, domain);
533 }
534 found_klass = kls;
535 }
536
537 // If we fail to find an array klass, look again for its element type.
538 // The element type may be available either locally or via constraints.
539 // In either case, if we can find the element type in the system dictionary,
540 // we must build an array type around it. The CI requires array klasses
541 // to be loaded if their element klasses are loaded, except when memory
542 // is exhausted.
543 if (Signature::is_array(sym) &&
544 (sym->char_at(1) == JVM_SIGNATURE_ARRAY ||
545 sym->char_at(1) == JVM_SIGNATURE_CLASS ||
546 sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT )) {
547 // We have an unloaded array.
548 // Build it on the fly if the element class exists.
549 SignatureStream ss(sym, false);
550 ss.skip_array_prefix(1);
551 // Get element ciKlass recursively.
552 ciKlass* elem_klass =
553 get_klass_by_name_impl(accessing_klass,
554 cpool,
555 get_symbol(ss.as_symbol()),
556 require_local);
557 if (elem_klass != NULL && elem_klass->is_loaded()) {
558 // Now make an array for it
559 bool null_free_array = sym->is_Q_array_signature() && sym->char_at(1) == JVM_SIGNATURE_PRIMITIVE_OBJECT;
560 return ciArrayKlass::make(elem_klass, null_free_array);
561 }
562 }
563
564 if (found_klass == NULL && !cpool.is_null() && cpool->has_preresolution()) {
565 // Look inside the constant pool for pre-resolved class entries.
566 for (int i = cpool->length() - 1; i >= 1; i--) {
567 if (cpool->tag_at(i).is_klass()) {
568 Klass* kls = cpool->resolved_klass_at(i);
569 if (kls->name() == sym) {
570 found_klass = kls;
571 break;
572 }
573 }
574 }
575 }
576
577 if (found_klass != NULL) {
578 // Found it. Build a CI handle.
579 return get_klass(found_klass);
580 }
581
582 if (require_local) return NULL;
583
584 // Not yet loaded into the VM, or not governed by loader constraints.
585 // Make a CI representative for it.
586 int i = 0;
587 while (sym->char_at(i) == JVM_SIGNATURE_ARRAY) {
588 i++;
589 }
590 if (i > 0 && sym->char_at(i) == JVM_SIGNATURE_PRIMITIVE_OBJECT) {
591 // An unloaded array class of inline types is an ObjArrayKlass, an
592 // unloaded inline type class is an InstanceKlass. For consistency,
593 // make the signature of the unloaded array of inline type use L
594 // rather than Q.
595 char* new_name = name_buffer(sym->utf8_length()+1);
596 strncpy(new_name, (char*)sym->base(), sym->utf8_length());
597 new_name[i] = JVM_SIGNATURE_CLASS;
598 new_name[sym->utf8_length()] = '\0';
599 return get_unloaded_klass(accessing_klass, ciSymbol::make(new_name));
600 }
601 return get_unloaded_klass(accessing_klass, name);
602 }
603
604 // ------------------------------------------------------------------
605 // ciEnv::get_klass_by_name
606 ciKlass* ciEnv::get_klass_by_name(ciKlass* accessing_klass,
607 ciSymbol* klass_name,
608 bool require_local) {
609 GUARDED_VM_ENTRY(return get_klass_by_name_impl(accessing_klass,
610 constantPoolHandle(),
611 klass_name,
612 require_local);)
613 }
614
615 // ------------------------------------------------------------------
616 // ciEnv::get_klass_by_index_impl
617 //
618 // Implementation of get_klass_by_index.
619 ciKlass* ciEnv::get_klass_by_index_impl(const constantPoolHandle& cpool,
620 int index,
621 bool& is_accessible,
622 ciInstanceKlass* accessor) {
623 Klass* klass = NULL;
624 Symbol* klass_name = NULL;
625
626 if (cpool->tag_at(index).is_symbol()) {
627 klass_name = cpool->symbol_at(index);
628 } else {
629 // Check if it's resolved if it's not a symbol constant pool entry.
630 klass = ConstantPool::klass_at_if_loaded(cpool, index);
631 // Try to look it up by name.
632 if (klass == NULL) {
633 klass_name = cpool->klass_name_at(index);
634 }
635 }
636
637 if (klass == NULL) {
638 // Not found in constant pool. Use the name to do the lookup.
639 ciKlass* k = get_klass_by_name_impl(accessor,
640 cpool,
641 get_symbol(klass_name),
642 false);
643 // Calculate accessibility the hard way.
644 if (!k->is_loaded()) {
645 is_accessible = false;
646 } else if (k->loader() != accessor->loader() &&
647 get_klass_by_name_impl(accessor, cpool, k->name(), true) == NULL) {
648 // Loaded only remotely. Not linked yet.
649 is_accessible = false;
650 } else {
651 // Linked locally, and we must also check public/private, etc.
652 is_accessible = check_klass_accessibility(accessor, k->get_Klass());
653 }
654 return k;
655 }
656
657 // Check for prior unloaded klass. The SystemDictionary's answers
658 // can vary over time but the compiler needs consistency.
659 ciSymbol* name = get_symbol(klass->name());
660 ciKlass* unloaded_klass = check_get_unloaded_klass(accessor, name);
661 if (unloaded_klass != NULL) {
662 is_accessible = false;
663 return unloaded_klass;
664 }
665
666 // It is known to be accessible, since it was found in the constant pool.
667 ciKlass* ciKlass = get_klass(klass);
668 is_accessible = true;
669 #ifndef PRODUCT
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 #endif
675 return ciKlass;
676 }
677
678 // ------------------------------------------------------------------
679 // ciEnv::get_klass_by_index
680 //
681 // Get a klass from the constant pool.
682 ciKlass* ciEnv::get_klass_by_index(const constantPoolHandle& cpool,
683 int index,
684 bool& is_accessible,
685 ciInstanceKlass* accessor) {
686 GUARDED_VM_ENTRY(return get_klass_by_index_impl(cpool, index, is_accessible, accessor);)
687 }
688
689 // ------------------------------------------------------------------
690 // ciEnv::is_inline_klass
691 //
692 // Check if the klass is an inline klass.
693 bool ciEnv::has_Q_signature(const constantPoolHandle& cpool, int index) {
694 GUARDED_VM_ENTRY(return cpool->klass_name_at(index)->is_Q_signature();)
695 }
696
697 // ------------------------------------------------------------------
698 // ciEnv::unbox_primitive_value
699 //
700 // Unbox a primitive and return it as a ciConstant.
701 ciConstant ciEnv::unbox_primitive_value(ciObject* cibox, BasicType expected_bt) {
702 jvalue value;
703 BasicType bt = java_lang_boxing_object::get_value(cibox->get_oop(), &value);
704 if (bt != expected_bt && expected_bt != T_ILLEGAL) {
705 assert(false, "type mismatch: %s vs %s", type2name(expected_bt), cibox->klass()->name()->as_klass_external_name());
706 return ciConstant();
707 }
708 switch (bt) {
709 case T_BOOLEAN: return ciConstant(bt, value.z);
710 case T_BYTE: return ciConstant(bt, value.b);
711 case T_SHORT: return ciConstant(bt, value.s);
712 case T_CHAR: return ciConstant(bt, value.c);
713 case T_INT: return ciConstant(bt, value.i);
714 case T_LONG: return ciConstant(value.j);
715 case T_FLOAT: return ciConstant(value.f);
716 case T_DOUBLE: return ciConstant(value.d);
717
718 default:
719 assert(false, "not a primitive type: %s", type2name(bt));
720 return ciConstant();
721 }
722 }
723
724 // ------------------------------------------------------------------
725 // ciEnv::get_resolved_constant
726 //
727 ciConstant ciEnv::get_resolved_constant(const constantPoolHandle& cpool, int obj_index) {
728 assert(obj_index >= 0, "");
729 oop obj = cpool->resolved_references()->obj_at(obj_index);
730 if (obj == NULL) {
731 // Unresolved constant. It is resolved when the corresponding slot contains a non-null reference.
732 // Null constant is represented as a sentinel (non-null) value.
733 return ciConstant();
734 } else if (obj == Universe::the_null_sentinel()) {
735 return ciConstant(T_OBJECT, get_object(NULL));
736 } else {
737 ciObject* ciobj = get_object(obj);
738 if (ciobj->is_array()) {
739 return ciConstant(T_ARRAY, ciobj);
740 } else {
741 int cp_index = cpool->object_to_cp_index(obj_index);
742 BasicType bt = cpool->basic_type_for_constant_at(cp_index);
743 if (is_java_primitive(bt)) {
744 assert(cpool->tag_at(cp_index).is_dynamic_constant(), "sanity");
745 return unbox_primitive_value(ciobj, bt);
746 } else {
747 assert(ciobj->is_instance(), "should be an instance");
748 return ciConstant(T_OBJECT, ciobj);
749 }
750 }
751 }
752 }
753
754 // ------------------------------------------------------------------
755 // ciEnv::get_constant_by_index_impl
756 //
757 // Implementation of get_constant_by_index().
758 ciConstant ciEnv::get_constant_by_index_impl(const constantPoolHandle& cpool,
759 int index, int obj_index,
760 ciInstanceKlass* accessor) {
761 bool ignore_will_link;
762 if (obj_index >= 0) {
763 ciConstant con = get_resolved_constant(cpool, obj_index);
764 if (con.is_valid()) {
765 return con;
766 }
767 }
768 constantTag tag = cpool->tag_at(index);
769 if (tag.is_int()) {
770 return ciConstant(T_INT, (jint)cpool->int_at(index));
771 } else if (tag.is_long()) {
772 return ciConstant((jlong)cpool->long_at(index));
773 } else if (tag.is_float()) {
774 return ciConstant((jfloat)cpool->float_at(index));
775 } else if (tag.is_double()) {
776 return ciConstant((jdouble)cpool->double_at(index));
777 } else if (tag.is_string()) {
778 EXCEPTION_CONTEXT;
779 assert(obj_index >= 0, "should have an object index");
780 oop string = cpool->string_at(index, obj_index, THREAD);
781 if (HAS_PENDING_EXCEPTION) {
782 CLEAR_PENDING_EXCEPTION;
783 record_out_of_memory_failure();
784 return ciConstant();
785 }
786 ciInstance* constant = get_object(string)->as_instance();
787 return ciConstant(T_OBJECT, constant);
788 } else if (tag.is_unresolved_klass_in_error()) {
789 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(NULL));
790 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
791 ciKlass* klass = get_klass_by_index_impl(cpool, index, ignore_will_link, accessor);
792 if (!klass->is_loaded()) {
793 return ciConstant(T_OBJECT, get_unloaded_klass_mirror(klass));
794 } else {
795 if (tag.is_Qdescriptor_klass()) {
796 return ciConstant(T_OBJECT, klass->as_inline_klass()->val_mirror());
797 } else {
798 return ciConstant(T_OBJECT, klass->java_mirror());
799 }
800 }
801 } else if (tag.is_method_type() || tag.is_method_type_in_error()) {
802 // must execute Java code to link this CP entry into cache[i].f1
803 assert(obj_index >= 0, "should have an object index");
804 ciSymbol* signature = get_symbol(cpool->method_type_signature_at(index));
805 ciObject* ciobj = get_unloaded_method_type_constant(signature);
806 return ciConstant(T_OBJECT, ciobj);
807 } else if (tag.is_method_handle() || tag.is_method_handle_in_error()) {
808 // must execute Java code to link this CP entry into cache[i].f1
809 assert(obj_index >= 0, "should have an object index");
810 int ref_kind = cpool->method_handle_ref_kind_at(index);
811 int callee_index = cpool->method_handle_klass_index_at(index);
812 ciKlass* callee = get_klass_by_index_impl(cpool, callee_index, ignore_will_link, accessor);
813 ciSymbol* name = get_symbol(cpool->method_handle_name_ref_at(index));
814 ciSymbol* signature = get_symbol(cpool->method_handle_signature_ref_at(index));
815 ciObject* ciobj = get_unloaded_method_handle_constant(callee, name, signature, ref_kind);
816 return ciConstant(T_OBJECT, ciobj);
817 } else if (tag.is_dynamic_constant() || tag.is_dynamic_constant_in_error()) {
818 assert(obj_index >= 0, "should have an object index");
819 return ciConstant(T_OBJECT, unloaded_ciinstance()); // unresolved dynamic constant
820 } else {
821 assert(false, "unknown tag: %d (%s)", tag.value(), tag.internal_name());
822 return ciConstant();
823 }
824 }
825
826 // ------------------------------------------------------------------
827 // ciEnv::get_constant_by_index
828 //
829 // Pull a constant out of the constant pool. How appropriate.
830 //
831 // Implementation note: this query is currently in no way cached.
832 ciConstant ciEnv::get_constant_by_index(const constantPoolHandle& cpool,
833 int pool_index, int cache_index,
834 ciInstanceKlass* accessor) {
835 GUARDED_VM_ENTRY(return get_constant_by_index_impl(cpool, pool_index, cache_index, accessor);)
836 }
837
838 // ------------------------------------------------------------------
839 // ciEnv::get_field_by_index_impl
840 //
841 // Implementation of get_field_by_index.
842 //
843 // Implementation note: the results of field lookups are cached
844 // in the accessor klass.
845 ciField* ciEnv::get_field_by_index_impl(ciInstanceKlass* accessor,
846 int index) {
847 ciConstantPoolCache* cache = accessor->field_cache();
848 if (cache == NULL) {
849 ciField* field = new (arena()) ciField(accessor, index);
850 return field;
851 } else {
852 ciField* field = (ciField*)cache->get(index);
853 if (field == NULL) {
854 field = new (arena()) ciField(accessor, index);
855 cache->insert(index, field);
856 }
857 return field;
858 }
859 }
860
861 // ------------------------------------------------------------------
862 // ciEnv::get_field_by_index
863 //
864 // Get a field by index from a klass's constant pool.
865 ciField* ciEnv::get_field_by_index(ciInstanceKlass* accessor,
866 int index) {
867 GUARDED_VM_ENTRY(return get_field_by_index_impl(accessor, index);)
868 }
869
870 // ------------------------------------------------------------------
871 // ciEnv::lookup_method
872 //
873 // Perform an appropriate method lookup based on accessor, holder,
874 // name, signature, and bytecode.
875 Method* ciEnv::lookup_method(ciInstanceKlass* accessor,
876 ciKlass* holder,
877 Symbol* name,
878 Symbol* sig,
879 Bytecodes::Code bc,
880 constantTag tag) {
881 InstanceKlass* accessor_klass = accessor->get_instanceKlass();
882 Klass* holder_klass = holder->get_Klass();
883
884 // Accessibility checks are performed in ciEnv::get_method_by_index_impl.
885 assert(check_klass_accessibility(accessor, holder_klass), "holder not accessible");
886
887 LinkInfo link_info(holder_klass, name, sig, accessor_klass,
888 LinkInfo::AccessCheck::required,
889 LinkInfo::LoaderConstraintCheck::required,
890 tag);
891 switch (bc) {
892 case Bytecodes::_invokestatic:
893 return LinkResolver::resolve_static_call_or_null(link_info);
894 case Bytecodes::_invokespecial:
895 return LinkResolver::resolve_special_call_or_null(link_info);
896 case Bytecodes::_invokeinterface:
897 return LinkResolver::linktime_resolve_interface_method_or_null(link_info);
898 case Bytecodes::_invokevirtual:
899 return LinkResolver::linktime_resolve_virtual_method_or_null(link_info);
900 default:
901 fatal("Unhandled bytecode: %s", Bytecodes::name(bc));
902 return NULL; // silence compiler warnings
903 }
904 }
905
906
907 // ------------------------------------------------------------------
908 // ciEnv::get_method_by_index_impl
909 ciMethod* ciEnv::get_method_by_index_impl(const constantPoolHandle& cpool,
910 int index, Bytecodes::Code bc,
911 ciInstanceKlass* accessor) {
912 assert(cpool.not_null(), "need constant pool");
913 assert(accessor != NULL, "need origin of access");
914 if (bc == Bytecodes::_invokedynamic) {
915 ConstantPoolCacheEntry* cpce = cpool->invokedynamic_cp_cache_entry_at(index);
916 bool is_resolved = !cpce->is_f1_null();
917 // FIXME: code generation could allow for null (unlinked) call site
918 // The call site could be made patchable as follows:
919 // Load the appendix argument from the constant pool.
920 // Test the appendix argument and jump to a known deopt routine if it is null.
921 // Jump through a patchable call site, which is initially a deopt routine.
922 // Patch the call site to the nmethod entry point of the static compiled lambda form.
923 // As with other two-component call sites, both values must be independently verified.
924
925 if (is_resolved) {
926 // Get the invoker Method* from the constant pool.
927 // (The appendix argument, if any, will be noted in the method's signature.)
928 Method* adapter = cpce->f1_as_method();
929 return get_method(adapter);
930 }
931
932 // Fake a method that is equivalent to a declared method.
933 ciInstanceKlass* holder = get_instance_klass(vmClasses::MethodHandle_klass());
934 ciSymbol* name = ciSymbols::invokeBasic_name();
935 ciSymbol* signature = get_symbol(cpool->signature_ref_at(index));
936 return get_unloaded_method(holder, name, signature, accessor);
937 } else {
938 const int holder_index = cpool->klass_ref_index_at(index);
939 bool holder_is_accessible;
940 ciKlass* holder = get_klass_by_index_impl(cpool, holder_index, holder_is_accessible, accessor);
941
942 // Get the method's name and signature.
943 Symbol* name_sym = cpool->name_ref_at(index);
944 Symbol* sig_sym = cpool->signature_ref_at(index);
945
946 if (cpool->has_preresolution()
947 || ((holder == ciEnv::MethodHandle_klass() || holder == ciEnv::VarHandle_klass()) &&
948 MethodHandles::is_signature_polymorphic_name(holder->get_Klass(), name_sym))) {
949 // Short-circuit lookups for JSR 292-related call sites.
950 // That is, do not rely only on name-based lookups, because they may fail
951 // if the names are not resolvable in the boot class loader (7056328).
952 switch (bc) {
953 case Bytecodes::_invokevirtual:
954 case Bytecodes::_invokeinterface:
955 case Bytecodes::_invokespecial:
956 case Bytecodes::_invokestatic:
957 {
958 Method* m = ConstantPool::method_at_if_loaded(cpool, index);
959 if (m != NULL) {
960 return get_method(m);
961 }
962 }
963 break;
964 default:
965 break;
966 }
967 }
968
969 if (holder_is_accessible) { // Our declared holder is loaded.
970 constantTag tag = cpool->tag_ref_at(index);
971 assert(accessor->get_instanceKlass() == cpool->pool_holder(), "not the pool holder?");
972 Method* m = lookup_method(accessor, holder, name_sym, sig_sym, bc, tag);
973 if (m != NULL &&
974 (bc == Bytecodes::_invokestatic
975 ? m->method_holder()->is_not_initialized()
976 : !m->method_holder()->is_loaded())) {
977 m = NULL;
978 }
979 #ifdef ASSERT
980 if (m != NULL && ReplayCompiles && !ciReplay::is_loaded(m)) {
981 m = NULL;
982 }
983 #endif
984 if (m != NULL) {
985 // We found the method.
986 return get_method(m);
987 }
988 }
989
990 // Either the declared holder was not loaded, or the method could
991 // not be found. Create a dummy ciMethod to represent the failed
992 // lookup.
993 ciSymbol* name = get_symbol(name_sym);
994 ciSymbol* signature = get_symbol(sig_sym);
995 return get_unloaded_method(holder, name, signature, accessor);
996 }
997 }
998
999
1000 // ------------------------------------------------------------------
1001 // ciEnv::get_instance_klass_for_declared_method_holder
1002 ciInstanceKlass* ciEnv::get_instance_klass_for_declared_method_holder(ciKlass* method_holder) {
1003 // For the case of <array>.clone(), the method holder can be a ciArrayKlass
1004 // instead of a ciInstanceKlass. For that case simply pretend that the
1005 // declared holder is Object.clone since that's where the call will bottom out.
1006 // A more correct fix would trickle out through many interfaces in CI,
1007 // requiring ciInstanceKlass* to become ciKlass* and many more places would
1008 // require checks to make sure the expected type was found. Given that this
1009 // only occurs for clone() the more extensive fix seems like overkill so
1010 // instead we simply smear the array type into Object.
1011 guarantee(method_holder != NULL, "no method holder");
1012 if (method_holder->is_instance_klass()) {
1013 return method_holder->as_instance_klass();
1014 } else if (method_holder->is_array_klass()) {
1015 return current()->Object_klass();
1016 } else {
1017 ShouldNotReachHere();
1018 }
1019 return NULL;
1020 }
1021
1022
1023 // ------------------------------------------------------------------
1024 // ciEnv::get_method_by_index
1025 ciMethod* ciEnv::get_method_by_index(const constantPoolHandle& cpool,
1026 int index, Bytecodes::Code bc,
1027 ciInstanceKlass* accessor) {
1028 GUARDED_VM_ENTRY(return get_method_by_index_impl(cpool, index, bc, accessor);)
1029 }
1030
1031
1032 // ------------------------------------------------------------------
1033 // ciEnv::name_buffer
1034 char *ciEnv::name_buffer(int req_len) {
1035 if (_name_buffer_len < req_len) {
1036 if (_name_buffer == NULL) {
1037 _name_buffer = (char*)arena()->Amalloc(sizeof(char)*req_len);
1038 _name_buffer_len = req_len;
1039 } else {
1040 _name_buffer =
1041 (char*)arena()->Arealloc(_name_buffer, _name_buffer_len, req_len);
1042 _name_buffer_len = req_len;
1043 }
1044 }
1045 return _name_buffer;
1046 }
1047
1048 // ------------------------------------------------------------------
1049 // ciEnv::is_in_vm
1050 bool ciEnv::is_in_vm() {
1051 return JavaThread::current()->thread_state() == _thread_in_vm;
1052 }
1053
1054 // ------------------------------------------------------------------
1055 // ciEnv::validate_compile_task_dependencies
1056 //
1057 // Check for changes during compilation (e.g. class loads, evolution,
1058 // breakpoints, call site invalidation).
1059 void ciEnv::validate_compile_task_dependencies(ciMethod* target) {
1060 if (failing()) return; // no need for further checks
1061
1062 Dependencies::DepType result = dependencies()->validate_dependencies(_task);
1063 if (result != Dependencies::end_marker) {
1064 if (result == Dependencies::call_site_target_value) {
1065 _inc_decompile_count_on_failure = false;
1066 record_failure("call site target change");
1067 } else if (Dependencies::is_klass_type(result)) {
1068 record_failure("concurrent class loading");
1069 } else {
1070 record_failure("invalid non-klass dependency");
1071 }
1072 }
1073 }
1074
1075 // ------------------------------------------------------------------
1076 // ciEnv::register_method
1077 void ciEnv::register_method(ciMethod* target,
1078 int entry_bci,
1079 CodeOffsets* offsets,
1080 int orig_pc_offset,
1081 CodeBuffer* code_buffer,
1082 int frame_words,
1083 OopMapSet* oop_map_set,
1084 ExceptionHandlerTable* handler_table,
1085 ImplicitExceptionTable* inc_table,
1086 AbstractCompiler* compiler,
1087 bool has_unsafe_access,
1088 bool has_wide_vectors,
1089 RTMState rtm_state,
1090 const GrowableArrayView<RuntimeStub*>& native_invokers) {
1091 VM_ENTRY_MARK;
1092 nmethod* nm = NULL;
1093 {
1094 methodHandle method(THREAD, target->get_Method());
1095
1096 // We require method counters to store some method state (max compilation levels) required by the compilation policy.
1097 if (method->get_method_counters(THREAD) == NULL) {
1098 record_failure("can't create method counters");
1099 // All buffers in the CodeBuffer are allocated in the CodeCache.
1100 // If the code buffer is created on each compile attempt
1101 // as in C2, then it must be freed.
1102 code_buffer->free_blob();
1103 return;
1104 }
1105
1106 // To prevent compile queue updates.
1107 MutexLocker locker(THREAD, MethodCompileQueue_lock);
1108
1109 // Prevent SystemDictionary::add_to_hierarchy from running
1110 // and invalidating our dependencies until we install this method.
1111 // No safepoints are allowed. Otherwise, class redefinition can occur in between.
1112 MutexLocker ml(Compile_lock);
1113 NoSafepointVerifier nsv;
1114
1115 // Change in Jvmti state may invalidate compilation.
1116 if (!failing() && jvmti_state_changed()) {
1117 record_failure("Jvmti state change invalidated dependencies");
1118 }
1119
1120 // Change in DTrace flags may invalidate compilation.
1121 if (!failing() &&
1122 ( (!dtrace_extended_probes() && ExtendedDTraceProbes) ||
1123 (!dtrace_method_probes() && DTraceMethodProbes) ||
1124 (!dtrace_alloc_probes() && DTraceAllocProbes) )) {
1125 record_failure("DTrace flags change invalidated dependencies");
1126 }
1127
1128 if (!failing() && target->needs_clinit_barrier() &&
1129 target->holder()->is_in_error_state()) {
1130 record_failure("method holder is in error state");
1131 }
1132
1133 if (!failing()) {
1134 if (log() != NULL) {
1135 // Log the dependencies which this compilation declares.
1136 dependencies()->log_all_dependencies();
1137 }
1138
1139 // Encode the dependencies now, so we can check them right away.
1140 dependencies()->encode_content_bytes();
1141
1142 // Check for {class loads, evolution, breakpoints, ...} during compilation
1143 validate_compile_task_dependencies(target);
1144 }
1145 #if INCLUDE_RTM_OPT
1146 if (!failing() && (rtm_state != NoRTM) &&
1147 (method()->method_data() != NULL) &&
1148 (method()->method_data()->rtm_state() != rtm_state)) {
1149 // Preemptive decompile if rtm state was changed.
1150 record_failure("RTM state change invalidated rtm code");
1151 }
1152 #endif
1153
1154 if (failing()) {
1155 // While not a true deoptimization, it is a preemptive decompile.
1156 MethodData* mdo = method()->method_data();
1157 if (mdo != NULL && _inc_decompile_count_on_failure) {
1158 mdo->inc_decompile_count();
1159 }
1160
1161 // All buffers in the CodeBuffer are allocated in the CodeCache.
1162 // If the code buffer is created on each compile attempt
1163 // as in C2, then it must be freed.
1164 code_buffer->free_blob();
1165 return;
1166 }
1167
1168 assert(offsets->value(CodeOffsets::Deopt) != -1, "must have deopt entry");
1169 assert(offsets->value(CodeOffsets::Exceptions) != -1, "must have exception entry");
1170
1171 nm = nmethod::new_nmethod(method,
1172 compile_id(),
1173 entry_bci,
1174 offsets,
1175 orig_pc_offset,
1176 debug_info(), dependencies(), code_buffer,
1177 frame_words, oop_map_set,
1178 handler_table, inc_table,
1179 compiler, task()->comp_level(),
1180 native_invokers);
1181
1182 // Free codeBlobs
1183 code_buffer->free_blob();
1184
1185 if (nm != NULL) {
1186 nm->set_has_unsafe_access(has_unsafe_access);
1187 nm->set_has_wide_vectors(has_wide_vectors);
1188 #if INCLUDE_RTM_OPT
1189 nm->set_rtm_state(rtm_state);
1190 #endif
1191
1192 // Record successful registration.
1193 // (Put nm into the task handle *before* publishing to the Java heap.)
1194 if (task() != NULL) {
1195 task()->set_code(nm);
1196 }
1197
1198 if (entry_bci == InvocationEntryBci) {
1199 if (TieredCompilation) {
1200 // If there is an old version we're done with it
1201 CompiledMethod* old = method->code();
1202 if (TraceMethodReplacement && old != NULL) {
1203 ResourceMark rm;
1204 char *method_name = method->name_and_sig_as_C_string();
1205 tty->print_cr("Replacing method %s", method_name);
1206 }
1207 if (old != NULL) {
1208 old->make_not_used();
1209 }
1210 }
1211
1212 LogTarget(Info, nmethod, install) lt;
1213 if (lt.is_enabled()) {
1214 ResourceMark rm;
1215 char *method_name = method->name_and_sig_as_C_string();
1216 lt.print("Installing method (%d) %s ",
1217 task()->comp_level(), method_name);
1218 }
1219 // Allow the code to be executed
1220 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1221 if (nm->make_in_use()) {
1222 method->set_code(method, nm);
1223 }
1224 } else {
1225 LogTarget(Info, nmethod, install) lt;
1226 if (lt.is_enabled()) {
1227 ResourceMark rm;
1228 char *method_name = method->name_and_sig_as_C_string();
1229 lt.print("Installing osr method (%d) %s @ %d",
1230 task()->comp_level(), method_name, entry_bci);
1231 }
1232 MutexLocker ml(CompiledMethod_lock, Mutex::_no_safepoint_check_flag);
1233 if (nm->make_in_use()) {
1234 method->method_holder()->add_osr_nmethod(nm);
1235 }
1236 }
1237 }
1238 } // safepoints are allowed again
1239
1240 if (nm != NULL) {
1241 // JVMTI -- compiled method notification (must be done outside lock)
1242 nm->post_compiled_method_load_event();
1243 } else {
1244 // The CodeCache is full.
1245 record_failure("code cache is full");
1246 }
1247 }
1248
1249 // ------------------------------------------------------------------
1250 // ciEnv::comp_level
1251 int ciEnv::comp_level() {
1252 if (task() == NULL) return CompilationPolicy::highest_compile_level();
1253 return task()->comp_level();
1254 }
1255
1256 // ------------------------------------------------------------------
1257 // ciEnv::compile_id
1258 uint ciEnv::compile_id() {
1259 if (task() == NULL) return 0;
1260 return task()->compile_id();
1261 }
1262
1263 // ------------------------------------------------------------------
1264 // ciEnv::notice_inlined_method()
1265 void ciEnv::notice_inlined_method(ciMethod* method) {
1266 _num_inlined_bytecodes += method->code_size_for_inlining();
1267 }
1268
1269 // ------------------------------------------------------------------
1270 // ciEnv::num_inlined_bytecodes()
1271 int ciEnv::num_inlined_bytecodes() const {
1272 return _num_inlined_bytecodes;
1273 }
1274
1275 // ------------------------------------------------------------------
1276 // ciEnv::record_failure()
1277 void ciEnv::record_failure(const char* reason) {
1278 if (_failure_reason == NULL) {
1279 // Record the first failure reason.
1280 _failure_reason = reason;
1281 }
1282 }
1283
1284 void ciEnv::report_failure(const char* reason) {
1285 EventCompilationFailure event;
1286 if (event.should_commit()) {
1287 CompilerEvent::CompilationFailureEvent::post(event, compile_id(), reason);
1288 }
1289 }
1290
1291 // ------------------------------------------------------------------
1292 // ciEnv::record_method_not_compilable()
1293 void ciEnv::record_method_not_compilable(const char* reason, bool all_tiers) {
1294 int new_compilable =
1295 all_tiers ? MethodCompilable_never : MethodCompilable_not_at_tier ;
1296
1297 // Only note transitions to a worse state
1298 if (new_compilable > _compilable) {
1299 if (log() != NULL) {
1300 if (all_tiers) {
1301 log()->elem("method_not_compilable");
1302 } else {
1303 log()->elem("method_not_compilable_at_tier level='%d'",
1304 current()->task()->comp_level());
1305 }
1306 }
1307 _compilable = new_compilable;
1308
1309 // Reset failure reason; this one is more important.
1310 _failure_reason = NULL;
1311 record_failure(reason);
1312 }
1313 }
1314
1315 // ------------------------------------------------------------------
1316 // ciEnv::record_out_of_memory_failure()
1317 void ciEnv::record_out_of_memory_failure() {
1318 // If memory is low, we stop compiling methods.
1319 record_method_not_compilable("out of memory");
1320 }
1321
1322 ciInstance* ciEnv::unloaded_ciinstance() {
1323 GUARDED_VM_ENTRY(return _factory->get_unloaded_object_constant();)
1324 }
1325
1326 // ------------------------------------------------------------------
1327 // Replay support
1328
1329
1330 // Lookup location descriptor for the class, if any.
1331 // Returns false if not found.
1332 bool ciEnv::dyno_loc(const InstanceKlass* ik, const char *&loc) const {
1333 bool found = false;
1334 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1335 if (!found) {
1336 return false;
1337 }
1338 loc = _dyno_locs->at(pos);
1339 return found;
1340 }
1341
1342 // Associate the current location descriptor with the given class and record for later lookup.
1343 void ciEnv::set_dyno_loc(const InstanceKlass* ik) {
1344 const char *loc = os::strdup(_dyno_name);
1345 bool found = false;
1346 int pos = _dyno_klasses->find_sorted<const InstanceKlass*, klass_compare>(ik, found);
1347 if (found) {
1348 _dyno_locs->at_put(pos, loc);
1349 } else {
1350 _dyno_klasses->insert_before(pos, ik);
1351 _dyno_locs->insert_before(pos, loc);
1352 }
1353 }
1354
1355 // Associate the current location descriptor with the given class and record for later lookup.
1356 // If it turns out that there are multiple locations for the given class, that conflict should
1357 // be handled here. Currently we choose the first location found.
1358 void ciEnv::record_best_dyno_loc(const InstanceKlass* ik) {
1359 if (!ik->is_hidden()) {
1360 return;
1361 }
1362 const char *loc0;
1363 if (dyno_loc(ik, loc0)) {
1364 // TODO: found multiple references, see if we can improve
1365 if (Verbose) {
1366 tty->print_cr("existing call site @ %s for %s",
1367 loc0, ik->external_name());
1368 }
1369 } else {
1370 set_dyno_loc(ik);
1371 }
1372 }
1373
1374 // Look up the location descriptor for the given class and print it to the output stream.
1375 bool ciEnv::print_dyno_loc(outputStream* out, const InstanceKlass* ik) const {
1376 const char *loc;
1377 if (dyno_loc(ik, loc)) {
1378 out->print("%s", loc);
1379 return true;
1380 } else {
1381 return false;
1382 }
1383 }
1384
1385 // Look up the location descriptor for the given class and return it as a string.
1386 // Returns NULL if no location is found.
1387 const char *ciEnv::dyno_name(const InstanceKlass* ik) const {
1388 if (ik->is_hidden()) {
1389 stringStream ss;
1390 if (print_dyno_loc(&ss, ik)) {
1391 ss.print(" ;"); // add terminator
1392 const char* call_site = ss.as_string();
1393 return call_site;
1394 }
1395 }
1396 return NULL;
1397 }
1398
1399 // Look up the location descriptor for the given class and return it as a string.
1400 // Returns the class name as a fallback if no location is found.
1401 const char *ciEnv::replay_name(ciKlass* k) const {
1402 if (k->is_instance_klass()) {
1403 return replay_name(k->as_instance_klass()->get_instanceKlass());
1404 }
1405 return k->name()->as_quoted_ascii();
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(const InstanceKlass* ik) const {
1411 const char* name = dyno_name(ik);
1412 if (name != NULL) {
1413 return name;
1414 }
1415 return ik->name()->as_quoted_ascii();
1416 }
1417
1418 // Process a java.lang.invoke.MemberName object and record any dynamic locations.
1419 void ciEnv::record_member(Thread* thread, oop member) {
1420 assert(java_lang_invoke_MemberName::is_instance(member), "!");
1421 // Check MemberName.clazz field
1422 oop clazz = java_lang_invoke_MemberName::clazz(member);
1423 if (clazz->klass()->is_instance_klass()) {
1424 RecordLocation fp(this, "clazz");
1425 InstanceKlass* ik = InstanceKlass::cast(clazz->klass());
1426 record_best_dyno_loc(ik);
1427 }
1428 // Check MemberName.method.vmtarget field
1429 Method* vmtarget = java_lang_invoke_MemberName::vmtarget(member);
1430 if (vmtarget != NULL) {
1431 RecordLocation fp2(this, "<vmtarget>");
1432 InstanceKlass* ik = vmtarget->method_holder();
1433 record_best_dyno_loc(ik);
1434 }
1435 }
1436
1437 // Read an object field. Lookup is done by name only.
1438 static inline oop obj_field(oop obj, const char* name) {
1439 return ciReplay::obj_field(obj, name);
1440 }
1441
1442 // Process a java.lang.invoke.LambdaForm object and record any dynamic locations.
1443 void ciEnv::record_lambdaform(Thread* thread, oop form) {
1444 assert(java_lang_invoke_LambdaForm::is_instance(form), "!");
1445
1446 {
1447 // Check LambdaForm.vmentry field
1448 oop member = java_lang_invoke_LambdaForm::vmentry(form);
1449 RecordLocation fp0(this, "vmentry");
1450 record_member(thread, member);
1451 }
1452
1453 // Check LambdaForm.names array
1454 objArrayOop names = (objArrayOop)obj_field(form, "names");
1455 if (names != NULL) {
1456 RecordLocation lp0(this, "names");
1457 int len = names->length();
1458 for (int i = 0; i < len; ++i) {
1459 oop name = names->obj_at(i);
1460 RecordLocation lp1(this, "%d", i);
1461 // Check LambdaForm.names[i].function field
1462 RecordLocation lp2(this, "function");
1463 oop function = obj_field(name, "function");
1464 if (function != NULL) {
1465 // Check LambdaForm.names[i].function.member field
1466 oop member = obj_field(function, "member");
1467 if (member != NULL) {
1468 RecordLocation lp3(this, "member");
1469 record_member(thread, member);
1470 }
1471 // Check LambdaForm.names[i].function.resolvedHandle field
1472 oop mh = obj_field(function, "resolvedHandle");
1473 if (mh != NULL) {
1474 RecordLocation lp3(this, "resolvedHandle");
1475 record_mh(thread, mh);
1476 }
1477 // Check LambdaForm.names[i].function.invoker field
1478 oop invoker = obj_field(function, "invoker");
1479 if (invoker != NULL) {
1480 RecordLocation lp3(this, "invoker");
1481 record_mh(thread, invoker);
1482 }
1483 }
1484 }
1485 }
1486 }
1487
1488 // Process a java.lang.invoke.MethodHandle object and record any dynamic locations.
1489 void ciEnv::record_mh(Thread* thread, oop mh) {
1490 {
1491 // Check MethodHandle.form field
1492 oop form = java_lang_invoke_MethodHandle::form(mh);
1493 RecordLocation fp(this, "form");
1494 record_lambdaform(thread, form);
1495 }
1496 // Check DirectMethodHandle.member field
1497 if (java_lang_invoke_DirectMethodHandle::is_instance(mh)) {
1498 oop member = java_lang_invoke_DirectMethodHandle::member(mh);
1499 RecordLocation fp(this, "member");
1500 record_member(thread, member);
1501 } else {
1502 // Check <MethodHandle subclass>.argL<n> fields
1503 // Probably BoundMethodHandle.Species_L*, but we only care if the field exists
1504 char arg_name[] = "argLXX";
1505 int max_arg = 99;
1506 for (int index = 0; index <= max_arg; ++index) {
1507 jio_snprintf(arg_name, sizeof (arg_name), "argL%d", index);
1508 oop arg = obj_field(mh, arg_name);
1509 if (arg != NULL) {
1510 RecordLocation fp(this, "%s", arg_name);
1511 if (arg->klass()->is_instance_klass()) {
1512 InstanceKlass* ik2 = InstanceKlass::cast(arg->klass());
1513 record_best_dyno_loc(ik2);
1514 record_call_site_obj(thread, arg);
1515 }
1516 } else {
1517 break;
1518 }
1519 }
1520 }
1521 }
1522
1523 // Process an object found at an invokedynamic/invokehandle call site and record any dynamic locations.
1524 // Types currently supported are MethodHandle and CallSite.
1525 // The object is typically the "appendix" object, or Bootstrap Method (BSM) object.
1526 void ciEnv::record_call_site_obj(Thread* thread, oop obj)
1527 {
1528 if (obj != NULL) {
1529 if (java_lang_invoke_MethodHandle::is_instance(obj)) {
1530 record_mh(thread, obj);
1531 } else if (java_lang_invoke_ConstantCallSite::is_instance(obj)) {
1532 oop target = java_lang_invoke_CallSite::target(obj);
1533 if (target->klass()->is_instance_klass()) {
1534 RecordLocation fp(this, "target");
1535 InstanceKlass* ik = InstanceKlass::cast(target->klass());
1536 record_best_dyno_loc(ik);
1537 }
1538 }
1539 }
1540 }
1541
1542 // Process an adapter Method* found at an invokedynamic/invokehandle call site and record any dynamic locations.
1543 void ciEnv::record_call_site_method(Thread* thread, Method* adapter) {
1544 InstanceKlass* holder = adapter->method_holder();
1545 if (!holder->is_hidden()) {
1546 return;
1547 }
1548 RecordLocation fp(this, "<adapter>");
1549 record_best_dyno_loc(holder);
1550 }
1551
1552 // Process an invokedynamic call site and record any dynamic locations.
1553 void ciEnv::process_invokedynamic(const constantPoolHandle &cp, int indy_index, JavaThread* thread) {
1554 ConstantPoolCacheEntry* cp_cache_entry = cp->invokedynamic_cp_cache_entry_at(indy_index);
1555 if (cp_cache_entry->is_resolved(Bytecodes::_invokedynamic)) {
1556 // process the adapter
1557 Method* adapter = cp_cache_entry->f1_as_method();
1558 record_call_site_method(thread, adapter);
1559 // process the appendix
1560 oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1561 {
1562 RecordLocation fp(this, "<appendix>");
1563 record_call_site_obj(thread, appendix);
1564 }
1565 // process the BSM
1566 int pool_index = cp_cache_entry->constant_pool_index();
1567 BootstrapInfo bootstrap_specifier(cp, pool_index, indy_index);
1568 oop bsm = cp->resolve_possibly_cached_constant_at(bootstrap_specifier.bsm_index(), thread);
1569 {
1570 RecordLocation fp(this, "<bsm>");
1571 record_call_site_obj(thread, bsm);
1572 }
1573 }
1574 }
1575
1576 // Process an invokehandle call site and record any dynamic locations.
1577 void ciEnv::process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread) {
1578 const int holder_index = cp->klass_ref_index_at(index);
1579 if (!cp->tag_at(holder_index).is_klass()) {
1580 return; // not resolved
1581 }
1582 Klass* holder = ConstantPool::klass_at_if_loaded(cp, holder_index);
1583 Symbol* name = cp->name_ref_at(index);
1584 if (MethodHandles::is_signature_polymorphic_name(holder, name)) {
1585 ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index));
1586 if (cp_cache_entry->is_resolved(Bytecodes::_invokehandle)) {
1587 // process the adapter
1588 Method* adapter = cp_cache_entry->f1_as_method();
1589 oop appendix = cp_cache_entry->appendix_if_resolved(cp);
1590 record_call_site_method(thread, adapter);
1591 // process the appendix
1592 {
1593 RecordLocation fp(this, "<appendix>");
1594 record_call_site_obj(thread, appendix);
1595 }
1596 }
1597 }
1598 }
1599
1600 // Search the class hierarchy for dynamic classes reachable through dynamic call sites or
1601 // constant pool entries and record for future lookup.
1602 void ciEnv::find_dynamic_call_sites() {
1603 _dyno_klasses = new (arena()) GrowableArray<const InstanceKlass*>(arena(), 100, 0, NULL);
1604 _dyno_locs = new (arena()) GrowableArray<const char *>(arena(), 100, 0, NULL);
1605
1606 // Iterate over the class hierarchy
1607 for (ClassHierarchyIterator iter(vmClasses::Object_klass()); !iter.done(); iter.next()) {
1608 Klass* sub = iter.klass();
1609 if (sub->is_instance_klass()) {
1610 InstanceKlass *isub = InstanceKlass::cast(sub);
1611 InstanceKlass* ik = isub;
1612 if (!ik->is_linked()) {
1613 continue;
1614 }
1615 if (ik->is_hidden()) {
1616 continue;
1617 }
1618 JavaThread* thread = JavaThread::current();
1619 const constantPoolHandle pool(thread, ik->constants());
1620
1621 // Look for invokedynamic/invokehandle call sites
1622 for (int i = 0; i < ik->methods()->length(); ++i) {
1623 Method* m = ik->methods()->at(i);
1624
1625 BytecodeStream bcs(methodHandle(thread, m));
1626 while (!bcs.is_last_bytecode()) {
1627 Bytecodes::Code opcode = bcs.next();
1628 opcode = bcs.raw_code();
1629 switch (opcode) {
1630 case Bytecodes::_invokedynamic:
1631 case Bytecodes::_invokehandle: {
1632 RecordLocation fp(this, "@bci %s %s %s %d",
1633 ik->name()->as_quoted_ascii(),
1634 m->name()->as_quoted_ascii(), m->signature()->as_quoted_ascii(),
1635 bcs.bci());
1636 if (opcode == Bytecodes::_invokedynamic) {
1637 int index = bcs.get_index_u4();
1638 process_invokedynamic(pool, index, thread);
1639 } else {
1640 assert(opcode == Bytecodes::_invokehandle, "new switch label added?");
1641 int cp_cache_index = bcs.get_index_u2_cpcache();
1642 process_invokehandle(pool, cp_cache_index, thread);
1643 }
1644 break;
1645 }
1646 default:
1647 break;
1648 }
1649 }
1650 }
1651
1652 // Look for MethodHandle contant pool entries
1653 RecordLocation fp(this, "@cpi %s", ik->name()->as_quoted_ascii());
1654 int len = pool->length();
1655 for (int i = 0; i < len; ++i) {
1656 if (pool->tag_at(i).is_method_handle()) {
1657 bool found_it;
1658 oop mh = pool->find_cached_constant_at(i, found_it, thread);
1659 if (mh != NULL) {
1660 RecordLocation fp(this, "%d", i);
1661 record_mh(thread, mh);
1662 }
1663 }
1664 }
1665 }
1666 }
1667 }
1668
1669 void ciEnv::dump_compile_data(outputStream* out) {
1670 CompileTask* task = this->task();
1671 if (task) {
1672 Method* method = task->method();
1673 int entry_bci = task->osr_bci();
1674 int comp_level = task->comp_level();
1675 out->print("compile ");
1676 get_method(method)->dump_name_as_ascii(out);
1677 out->print(" %d %d", entry_bci, comp_level);
1678 if (compiler_data() != NULL) {
1679 if (is_c2_compile(comp_level)) {
1680 #ifdef COMPILER2
1681 // Dump C2 inlining data.
1682 ((Compile*)compiler_data())->dump_inline_data(out);
1683 #endif
1684 } else if (is_c1_compile(comp_level)) {
1685 #ifdef COMPILER1
1686 // Dump C1 inlining data.
1687 ((Compilation*)compiler_data())->dump_inline_data(out);
1688 #endif
1689 }
1690 }
1691 out->cr();
1692 }
1693 }
1694
1695 // Called from VM error reporter, so be careful.
1696 // Don't safepoint or acquire any locks.
1697 //
1698 void ciEnv::dump_replay_data_helper(outputStream* out) {
1699 NoSafepointVerifier no_safepoint;
1700 ResourceMark rm;
1701
1702 out->print_cr("version %d", REPLAY_VERSION);
1703 #if INCLUDE_JVMTI
1704 out->print_cr("JvmtiExport can_access_local_variables %d", _jvmti_can_access_local_variables);
1705 out->print_cr("JvmtiExport can_hotswap_or_post_breakpoint %d", _jvmti_can_hotswap_or_post_breakpoint);
1706 out->print_cr("JvmtiExport can_post_on_exceptions %d", _jvmti_can_post_on_exceptions);
1707 #endif // INCLUDE_JVMTI
1708
1709 find_dynamic_call_sites();
1710
1711 GrowableArray<ciMetadata*>* objects = _factory->get_ci_metadata();
1712 out->print_cr("# %d ciObject found", objects->length());
1713
1714 // The very first entry is the InstanceKlass of the root method of the current compilation in order to get the right
1715 // protection domain to load subsequent classes during replay compilation.
1716 ciInstanceKlass::dump_replay_instanceKlass(out, task()->method()->method_holder());
1717
1718 for (int i = 0; i < objects->length(); i++) {
1719 objects->at(i)->dump_replay_data(out);
1720 }
1721 dump_compile_data(out);
1722 out->flush();
1723 }
1724
1725 // Called from VM error reporter, so be careful.
1726 // Don't safepoint or acquire any locks.
1727 //
1728 void ciEnv::dump_replay_data_unsafe(outputStream* out) {
1729 GUARDED_VM_ENTRY(
1730 dump_replay_data_helper(out);
1731 )
1732 }
1733
1734 void ciEnv::dump_replay_data(outputStream* out) {
1735 GUARDED_VM_ENTRY(
1736 MutexLocker ml(Compile_lock);
1737 dump_replay_data_helper(out);
1738 )
1739 }
1740
1741 void ciEnv::dump_replay_data(int compile_id) {
1742 char buffer[64];
1743 int ret = jio_snprintf(buffer, sizeof(buffer), "replay_pid%d_compid%d.log", os::current_process_id(), compile_id);
1744 if (ret > 0) {
1745 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1746 if (fd != -1) {
1747 FILE* replay_data_file = os::fdopen(fd, "w");
1748 if (replay_data_file != NULL) {
1749 fileStream replay_data_stream(replay_data_file, /*need_close=*/true);
1750 dump_replay_data(&replay_data_stream);
1751 tty->print_cr("# Compiler replay data is saved as: %s", buffer);
1752 } else {
1753 tty->print_cr("# Can't open file to dump replay data.");
1754 }
1755 }
1756 }
1757 }
1758
1759 void ciEnv::dump_inline_data(int compile_id) {
1760 char buffer[64];
1761 int ret = jio_snprintf(buffer, sizeof(buffer), "inline_pid%d_compid%d.log", os::current_process_id(), compile_id);
1762 if (ret > 0) {
1763 int fd = os::open(buffer, O_RDWR | O_CREAT | O_TRUNC, 0666);
1764 if (fd != -1) {
1765 FILE* inline_data_file = os::fdopen(fd, "w");
1766 if (inline_data_file != NULL) {
1767 fileStream replay_data_stream(inline_data_file, /*need_close=*/true);
1768 GUARDED_VM_ENTRY(
1769 MutexLocker ml(Compile_lock);
1770 dump_compile_data(&replay_data_stream);
1771 )
1772 replay_data_stream.flush();
1773 tty->print("# Compiler inline data is saved as: ");
1774 tty->print_cr("%s", buffer);
1775 } else {
1776 tty->print_cr("# Can't open file to dump inline data.");
1777 }
1778 }
1779 }
1780 }