1 /*
2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
24
25 #ifndef SHARE_CI_CIENV_HPP
26 #define SHARE_CI_CIENV_HPP
27
28 #include "ci/ciClassList.hpp"
29 #include "ci/ciObjectFactory.hpp"
30 #include "classfile/vmClassMacros.hpp"
31 #include "code/debugInfoRec.hpp"
32 #include "code/dependencies.hpp"
33 #include "code/exceptionHandlerTable.hpp"
34 #include "compiler/compiler_globals.hpp"
35 #include "compiler/compilerThread.hpp"
36 #include "compiler/cHeapStringHolder.hpp"
37 #include "oops/methodData.hpp"
38 #include "runtime/javaThread.hpp"
39
40 class CompileTask;
41 class OopMapSet;
42
43 // ciEnv
44 //
45 // This class is the top level broker for requests from the compiler
46 // to the VM.
47 class ciEnv : StackObj {
48 CI_PACKAGE_ACCESS_TO
49 friend class CompileBroker;
50 friend class Dependencies; // for get_object, during logging
51 friend class RecordLocation;
52 friend class PrepareExtraDataClosure;
53
54 private:
55 Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects()
56 Arena _ciEnv_arena;
57 ciObjectFactory* _factory;
58 OopRecorder* _oop_recorder;
59 DebugInformationRecorder* _debug_info;
60 Dependencies* _dependencies;
61 CHeapStringHolder _failure_reason;
62 bool _inc_decompile_count_on_failure;
63 int _compilable;
64 bool _break_at_compile;
65 int _num_inlined_bytecodes;
66 CompileTask* _task; // faster access to CompilerThread::task
67 CompileLog* _log; // faster access to CompilerThread::log
68 void* _compiler_data; // compiler-specific stuff, if any
69
70 char* _name_buffer;
71 int _name_buffer_len;
72
73 // Cache Jvmti state
74 uint64_t _jvmti_redefinition_count;
75 bool _jvmti_can_hotswap_or_post_breakpoint;
76 bool _jvmti_can_access_local_variables;
77 bool _jvmti_can_post_on_exceptions;
78 bool _jvmti_can_pop_frame;
79 bool _jvmti_can_get_owned_monitor_info; // includes can_get_owned_monitor_stack_depth_info
80 bool _jvmti_can_walk_any_space;
81
82 // Cache DTrace flags
83 bool _dtrace_method_probes;
84 bool _dtrace_alloc_probes;
85
86 // Distinguished instances of certain ciObjects..
87 static ciObject* _null_object_instance;
88
89 #define VM_CLASS_DECL(name, ignore_s) static ciInstanceKlass* _##name;
90 VM_CLASSES_DO(VM_CLASS_DECL)
91 #undef VM_CLASS_DECL
92
93 static ciSymbol* _unloaded_cisymbol;
94 static ciInstanceKlass* _unloaded_ciinstance_klass;
95 static ciObjArrayKlass* _unloaded_ciobjarrayklass;
96
97 ciInstance* _NullPointerException_instance;
98 ciInstance* _ArithmeticException_instance;
99 ciInstance* _ArrayIndexOutOfBoundsException_instance;
100 ciInstance* _ArrayStoreException_instance;
101 ciInstance* _ClassCastException_instance;
102
103 ciInstance* _the_null_string; // The Java string "null"
104 ciInstance* _the_min_jint_string; // The Java string "-2147483648"
105
106 // Look up a klass by name from a particular class loader (the accessor's).
107 // If require_local, result must be defined in that class loader, or null.
108 // If !require_local, a result from remote class loader may be reported,
109 // if sufficient class loader constraints exist such that initiating
110 // a class loading request from the given loader is bound to return
111 // the class defined in the remote loader (or throw an error).
112 //
113 // Return an unloaded klass if !require_local and no class at all is found.
114 //
115 // The CI treats a klass as loaded if it is consistently defined in
116 // another loader, even if it hasn't yet been loaded in all loaders
117 // that could potentially see it via delegation.
118 ciKlass* get_klass_by_name(ciKlass* accessing_klass,
119 ciSymbol* klass_name,
120 bool require_local);
121
122 // Constant pool access.
123 ciKlass* get_klass_by_index(const constantPoolHandle& cpool,
124 int klass_index,
125 bool& is_accessible,
126 ciInstanceKlass* loading_klass);
127 ciConstant get_constant_by_index(const constantPoolHandle& cpool,
128 int pool_index, int cache_index,
129 ciInstanceKlass* accessor);
130 ciField* get_field_by_index(ciInstanceKlass* loading_klass,
131 int field_index, Bytecodes::Code bc);
132 ciMethod* get_method_by_index(const constantPoolHandle& cpool,
133 int method_index, Bytecodes::Code bc,
134 ciInstanceKlass* loading_klass);
135
136 // Implementation methods for loading and constant pool access.
137 ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass,
138 const constantPoolHandle& cpool,
139 ciSymbol* klass_name,
140 bool require_local);
141 ciKlass* get_klass_by_index_impl(const constantPoolHandle& cpool,
142 int klass_index,
143 bool& is_accessible,
144 ciInstanceKlass* loading_klass);
145 ciConstant get_constant_by_index_impl(const constantPoolHandle& cpool,
146 int pool_index, int cache_index,
147 ciInstanceKlass* loading_klass);
148 ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass,
149 int field_index, Bytecodes::Code bc);
150 ciMethod* get_method_by_index_impl(const constantPoolHandle& cpool,
151 int method_index, Bytecodes::Code bc,
152 ciInstanceKlass* loading_klass);
153
154 // Helper methods
155 bool check_klass_accessibility(ciKlass* accessing_klass,
156 Klass* resolved_klass);
157 Method* lookup_method(ciInstanceKlass* accessor,
158 ciKlass* holder,
159 Symbol* name,
160 Symbol* sig,
161 Bytecodes::Code bc,
162 constantTag tag);
163
164 ciConstant unbox_primitive_value(ciObject* cibox, BasicType expected_bt = T_ILLEGAL);
165 ciConstant get_resolved_constant(const constantPoolHandle& cpool, int obj_index);
166
167 // Get a ciObject from the object factory. Ensures uniqueness
168 // of ciObjects.
169 ciObject* get_object(oop o) {
170 if (o == nullptr) {
171 return _null_object_instance;
172 } else {
173 return _factory->get(o);
174 }
175 }
176
177 ciSymbol* get_symbol(Symbol* o) {
178 if (o == nullptr) {
179 ShouldNotReachHere();
180 return nullptr;
181 } else {
182 return _factory->get_symbol(o);
183 }
184 }
185
186 ciMetadata* get_metadata(Metadata* o) {
187 if (o == nullptr) {
188 return nullptr;
189 } else {
190 return _factory->get_metadata(o);
191 }
192 }
193
194 ciMetadata* cached_metadata(Metadata* o) {
195 return _factory->cached_metadata(o);
196 }
197
198 ciInstance* get_instance(oop o) {
199 if (o == nullptr) return nullptr;
200 return get_object(o)->as_instance();
201 }
202 ciObjArrayKlass* get_obj_array_klass(Klass* o) {
203 if (o == nullptr) return nullptr;
204 return get_metadata(o)->as_obj_array_klass();
205 }
206 ciTypeArrayKlass* get_type_array_klass(Klass* o) {
207 if (o == nullptr) return nullptr;
208 return get_metadata(o)->as_type_array_klass();
209 }
210 ciKlass* get_klass(Klass* o) {
211 if (o == nullptr) return nullptr;
212 return get_metadata(o)->as_klass();
213 }
214 ciInstanceKlass* get_instance_klass(Klass* o) {
215 if (o == nullptr) return nullptr;
216 return get_metadata(o)->as_instance_klass();
217 }
218 ciMethod* get_method(Method* o) {
219 if (o == nullptr) return nullptr;
220 return get_metadata(o)->as_method();
221 }
222 ciMethodData* get_method_data(MethodData* o) {
223 if (o == nullptr) return nullptr;
224 return get_metadata(o)->as_method_data();
225 }
226
227 ciMethod* get_method_from_handle(Method* method);
228
229 // Get a ciMethod representing either an unfound method or
230 // a method with an unloaded holder. Ensures uniqueness of
231 // the result.
232 ciMethod* get_unloaded_method(ciKlass* holder,
233 ciSymbol* name,
234 ciSymbol* signature,
235 ciInstanceKlass* accessor) {
236 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder);
237 return _factory->get_unloaded_method(declared_holder, name, signature, accessor);
238 }
239
240 // Get a ciKlass representing an unloaded klass.
241 // Ensures uniqueness of the result.
242 ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
243 ciSymbol* name) {
244 return _factory->get_unloaded_klass(accessing_klass, name, true);
245 }
246
247 // Get a ciKlass representing an unloaded klass mirror.
248 // Result is not necessarily unique, but will be unloaded.
249 ciInstance* get_unloaded_klass_mirror(ciKlass* type) {
250 return _factory->get_unloaded_klass_mirror(type);
251 }
252
253 // Get a ciInstance representing an unresolved method handle constant.
254 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder,
255 ciSymbol* name,
256 ciSymbol* signature,
257 int ref_kind) {
258 return _factory->get_unloaded_method_handle_constant(holder, name, signature, ref_kind);
259 }
260
261 // Get a ciInstance representing an unresolved method type constant.
262 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature) {
263 return _factory->get_unloaded_method_type_constant(signature);
264 }
265
266 // See if we already have an unloaded klass for the given name
267 // or return null if not.
268 ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) {
269 return _factory->get_unloaded_klass(accessing_klass, name, false);
270 }
271
272 // Get a ciReturnAddress corresponding to the given bci.
273 // Ensures uniqueness of the result.
274 ciReturnAddress* get_return_address(int bci) {
275 return _factory->get_return_address(bci);
276 }
277
278 // Get a ciMethodData representing the methodData for a method
279 // with none.
280 ciMethodData* get_empty_methodData() {
281 return _factory->get_empty_methodData();
282 }
283
284 // General utility : get a buffer of some required length.
285 // Used in symbol creation.
286 char* name_buffer(int req_len);
287
288 // Is this thread currently in the VM state?
289 static bool is_in_vm();
290
291 // Helper routine for determining the validity of a compilation with
292 // respect to method dependencies (e.g. concurrent class loading).
293 void validate_compile_task_dependencies(ciMethod* target);
294 public:
295 enum {
296 MethodCompilable,
297 MethodCompilable_not_at_tier,
298 MethodCompilable_never
299 };
300
301 ciEnv(CompileTask* task);
302 // Used only during initialization of the ci
303 ciEnv(Arena* arena);
304 ~ciEnv();
305
306 OopRecorder* oop_recorder() { return _oop_recorder; }
307 void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; }
308
309 DebugInformationRecorder* debug_info() { return _debug_info; }
310 void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; }
311
312 Dependencies* dependencies() { return _dependencies; }
313 void set_dependencies(Dependencies* d) { _dependencies = d; }
314
315 // This is true if the compilation is not going to produce code.
316 // (It is reasonable to retry failed compilations.)
317 bool failing() const { return _failure_reason.get() != nullptr; }
318
319 // Reason this compilation is failing, such as "too many basic blocks".
320 const char* failure_reason() const { return _failure_reason.get(); }
321
322 // Return state of appropriate compatibility
323 int compilable() { return _compilable; }
324
325 const char* retry_message() const {
326 switch (_compilable) {
327 case ciEnv::MethodCompilable_not_at_tier:
328 return "retry at different tier";
329 case ciEnv::MethodCompilable_never:
330 return "not retryable";
331 case ciEnv::MethodCompilable:
332 return nullptr;
333 default:
334 ShouldNotReachHere();
335 return nullptr;
336 }
337 }
338
339 bool break_at_compile() { return _break_at_compile; }
340 void set_break_at_compile(bool z) { _break_at_compile = z; }
341
342 // Cache Jvmti state
343 bool cache_jvmti_state();
344 bool jvmti_state_changed() const;
345 bool should_retain_local_variables() const {
346 return _jvmti_can_access_local_variables || _jvmti_can_pop_frame;
347 }
348 bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; }
349 bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions; }
350 bool jvmti_can_get_owned_monitor_info() const { return _jvmti_can_get_owned_monitor_info; }
351 bool jvmti_can_walk_any_space() const { return _jvmti_can_walk_any_space; }
352
353 // Cache DTrace flags
354 void cache_dtrace_flags();
355 bool dtrace_method_probes() const { return _dtrace_method_probes; }
356 bool dtrace_alloc_probes() const { return _dtrace_alloc_probes; }
357
358 // The compiler task which has created this env.
359 // May be useful to find out compile_id, comp_level, etc.
360 CompileTask* task() const { return _task; }
361
362 // Handy forwards to the task:
363 int comp_level(); // task()->comp_level()
364 int compile_id(); // task()->compile_id()
365
366 // Register the result of a compilation.
367 void register_method(ciMethod* target,
368 int entry_bci,
369 CodeOffsets* offsets,
370 int orig_pc_offset,
371 CodeBuffer* code_buffer,
372 int frame_words,
373 OopMapSet* oop_map_set,
374 ExceptionHandlerTable* handler_table,
375 ImplicitExceptionTable* inc_table,
376 AbstractCompiler* compiler,
377 bool has_unsafe_access,
378 bool has_wide_vectors,
379 bool has_monitors,
380 bool has_scoped_access,
381 int immediate_oops_patched);
382
383 // Access to certain well known ciObjects.
384 #define VM_CLASS_FUNC(name, ignore_s) \
385 ciInstanceKlass* name() { \
386 return _##name;\
387 }
388 VM_CLASSES_DO(VM_CLASS_FUNC)
389 #undef VM_CLASS_FUNC
390
391 ciInstance* NullPointerException_instance() {
392 assert(_NullPointerException_instance != nullptr, "initialization problem");
393 return _NullPointerException_instance;
394 }
395 ciInstance* ArithmeticException_instance() {
396 assert(_ArithmeticException_instance != nullptr, "initialization problem");
397 return _ArithmeticException_instance;
398 }
399 ciInstance* ArrayIndexOutOfBoundsException_instance() {
400 assert(_ArrayIndexOutOfBoundsException_instance != nullptr, "initialization problem");
401 return _ArrayIndexOutOfBoundsException_instance;
402 }
403 ciInstance* ArrayStoreException_instance() {
404 assert(_ArrayStoreException_instance != nullptr, "initialization problem");
405 return _ArrayStoreException_instance;
406 }
407 ciInstance* ClassCastException_instance() {
408 assert(_ClassCastException_instance != nullptr, "initialization problem");
409 return _ClassCastException_instance;
410 }
411
412 ciInstance* the_null_string();
413 ciInstance* the_min_jint_string();
414
415 static ciSymbol* unloaded_cisymbol() {
416 return _unloaded_cisymbol;
417 }
418 static ciObjArrayKlass* unloaded_ciobjarrayklass() {
419 return _unloaded_ciobjarrayklass;
420 }
421 static ciInstanceKlass* unloaded_ciinstance_klass() {
422 return _unloaded_ciinstance_klass;
423 }
424 ciInstance* unloaded_ciinstance();
425
426 ciInstanceKlass* get_box_klass_for_primitive_type(BasicType type);
427
428 ciKlass* find_system_klass(ciSymbol* klass_name);
429
430 // Note: To find a class from its name string, use ciSymbol::make,
431 // but consider adding to vmSymbols.hpp instead.
432
433 // converts the ciKlass* representing the holder of a method into a
434 // ciInstanceKlass*. This is needed since the holder of a method in
435 // the bytecodes could be an array type. Basically this converts
436 // array types into java/lang/Object and other types stay as they are.
437 static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass);
438
439 // Access to the compile-lifetime allocation arena.
440 Arena* arena() { return _arena; }
441
442 // What is the current compilation environment?
443 static ciEnv* current() { return CompilerThread::current()->env(); }
444
445 // Overload with current thread argument
446 static ciEnv* current(CompilerThread *thread) { return thread->env(); }
447
448 // Per-compiler data. (Used by C2 to publish the Compile* pointer.)
449 void* compiler_data() const { return _compiler_data; }
450 void set_compiler_data(void* x) { _compiler_data = x; }
451
452 // Notice that a method has been inlined in the current compile;
453 // used only for statistics.
454 void notice_inlined_method(ciMethod* method);
455
456 // Total number of bytecodes in inlined methods in this compile
457 int num_inlined_bytecodes() const;
458
459 // Output stream for logging compilation info.
460 CompileLog* log() { return _log; }
461 void set_log(CompileLog* log) { _log = log; }
462
463 void record_failure(const char* reason); // Record failure and report later
464 void report_failure(const char* reason); // Report failure immediately
465 void record_method_not_compilable(const char* reason, bool all_tiers = false);
466 void record_out_of_memory_failure();
467
468 // RedefineClasses support
469 void metadata_do(MetadataClosure* f) { _factory->metadata_do(f); }
470
471 // Replay support
472 private:
473 static int klass_compare(const InstanceKlass* const &ik1, const InstanceKlass* const &ik2) {
474 if (ik1 > ik2) {
475 return 1;
476 } else if (ik1 < ik2) {
477 return -1;
478 } else {
479 return 0;
480 }
481 }
482 bool dyno_loc(const InstanceKlass* ik, const char *&loc) const;
483 void set_dyno_loc(const InstanceKlass* ik);
484 void record_best_dyno_loc(const InstanceKlass* ik);
485 bool print_dyno_loc(outputStream* out, const InstanceKlass* ik) const;
486
487 GrowableArray<const InstanceKlass*>* _dyno_klasses;
488 GrowableArray<const char *>* _dyno_locs;
489
490 #define MAX_DYNO_NAME_LENGTH 1024
491 char _dyno_name[MAX_DYNO_NAME_LENGTH+1];
492
493 public:
494 // Dump the compilation replay data for the ciEnv to the stream.
495 void dump_replay_data(int compile_id);
496 void dump_inline_data(int compile_id);
497 void dump_replay_data(outputStream* out);
498 void dump_replay_data_unsafe(outputStream* out);
499 void dump_replay_data_helper(outputStream* out);
500 void dump_compile_data(outputStream* out);
501 void dump_replay_data_version(outputStream* out);
502
503 const char *dyno_name(const InstanceKlass* ik) const;
504 const char *replay_name(const InstanceKlass* ik) const;
505 const char *replay_name(ciKlass* i) const;
506
507 void record_lambdaform(Thread* thread, oop obj);
508 void record_member(Thread* thread, oop obj);
509 void record_mh(Thread* thread, oop obj);
510 void record_call_site_obj(Thread* thread, oop obj);
511 void record_call_site_method(Thread* thread, Method* adapter);
512 void process_invokedynamic(const constantPoolHandle &cp, int index, JavaThread* thread);
513 void process_invokehandle(const constantPoolHandle &cp, int index, JavaThread* thread);
514 void find_dynamic_call_sites();
515 };
516
517 #endif // SHARE_CI_CIENV_HPP