1 /* 2 * Copyright (c) 1999, 2016, 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 #ifndef SHARE_VM_CI_CIENV_HPP 26 #define SHARE_VM_CI_CIENV_HPP 27 28 #include "ci/ciClassList.hpp" 29 #include "ci/ciObjectFactory.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "code/debugInfoRec.hpp" 32 #include "code/dependencies.hpp" 33 #include "code/exceptionHandlerTable.hpp" 34 #include "compiler/oopMap.hpp" 35 #include "runtime/thread.hpp" 36 37 class CompileTask; 38 39 // ciEnv 40 // 41 // This class is the top level broker for requests from the compiler 42 // to the VM. 43 class ciEnv : StackObj { 44 CI_PACKAGE_ACCESS_TO 45 46 friend class CompileBroker; 47 friend class Dependencies; // for get_object, during logging 48 49 private: 50 Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects() 51 Arena _ciEnv_arena; 52 int _system_dictionary_modification_counter; 53 ciObjectFactory* _factory; 54 OopRecorder* _oop_recorder; 55 DebugInformationRecorder* _debug_info; 56 Dependencies* _dependencies; 57 const char* _failure_reason; 58 bool _inc_decompile_count_on_failure; 59 int _compilable; 60 bool _break_at_compile; 61 int _num_inlined_bytecodes; 62 CompileTask* _task; // faster access to CompilerThread::task 63 CompileLog* _log; // faster access to CompilerThread::log 64 void* _compiler_data; // compiler-specific stuff, if any 65 66 char* _name_buffer; 67 int _name_buffer_len; 68 69 // Cache Jvmti state 70 bool _jvmti_can_hotswap_or_post_breakpoint; 71 bool _jvmti_can_access_local_variables; 72 bool _jvmti_can_post_on_exceptions; 73 bool _jvmti_can_pop_frame; 74 75 // Cache DTrace flags 76 bool _dtrace_extended_probes; 77 bool _dtrace_monitor_probes; 78 bool _dtrace_method_probes; 79 bool _dtrace_alloc_probes; 80 81 // Distinguished instances of certain ciObjects.. 82 static ciObject* _null_object_instance; 83 84 #define WK_KLASS_DECL(name, ignore_s, ignore_o) static ciInstanceKlass* _##name; 85 WK_KLASSES_DO(WK_KLASS_DECL) 86 #undef WK_KLASS_DECL 87 88 static ciSymbol* _unloaded_cisymbol; 89 static ciInstanceKlass* _unloaded_ciinstance_klass; 90 static ciObjArrayKlass* _unloaded_ciobjarrayklass; 91 92 static jobject _ArrayIndexOutOfBoundsException_handle; 93 static jobject _ArrayStoreException_handle; 94 static jobject _ClassCastException_handle; 95 96 ciInstance* _NullPointerException_instance; 97 ciInstance* _ArithmeticException_instance; 98 ciInstance* _ArrayIndexOutOfBoundsException_instance; 99 ciInstance* _ArrayStoreException_instance; 100 ciInstance* _ClassCastException_instance; 101 102 ciInstance* _the_null_string; // The Java string "null" 103 ciInstance* _the_min_jint_string; // The Java string "-2147483648" 104 105 // Look up a klass by name from a particular class loader (the accessor's). 106 // If require_local, result must be defined in that class loader, or NULL. 107 // If !require_local, a result from remote class loader may be reported, 108 // if sufficient class loader constraints exist such that initiating 109 // a class loading request from the given loader is bound to return 110 // the class defined in the remote loader (or throw an error). 111 // 112 // Return an unloaded klass if !require_local and no class at all is found. 113 // 114 // The CI treats a klass as loaded if it is consistently defined in 115 // another loader, even if it hasn't yet been loaded in all loaders 116 // that could potentially see it via delegation. 117 ciKlass* get_klass_by_name(ciKlass* accessing_klass, 118 ciSymbol* klass_name, 119 bool require_local); 120 121 // Constant pool access. 122 ciKlass* get_klass_by_index(const constantPoolHandle& cpool, 123 int klass_index, 124 bool& is_accessible, 125 ciInstanceKlass* loading_klass); 126 ciConstant get_constant_by_index(const constantPoolHandle& cpool, 127 int pool_index, int cache_index, 128 ciInstanceKlass* accessor); 129 ciField* get_field_by_index(ciInstanceKlass* loading_klass, 130 int field_index); 131 ciMethod* get_method_by_index(const constantPoolHandle& cpool, 132 int method_index, Bytecodes::Code bc, 133 ciInstanceKlass* loading_klass); 134 135 // Implementation methods for loading and constant pool access. 136 ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass, 137 const constantPoolHandle& cpool, 138 ciSymbol* klass_name, 139 bool require_local); 140 ciKlass* get_klass_by_index_impl(const constantPoolHandle& cpool, 141 int klass_index, 142 bool& is_accessible, 143 ciInstanceKlass* loading_klass); 144 ciConstant get_constant_by_index_impl(const constantPoolHandle& cpool, 145 int pool_index, int cache_index, 146 ciInstanceKlass* loading_klass); 147 ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass, 148 int field_index); 149 ciMethod* get_method_by_index_impl(const constantPoolHandle& cpool, 150 int method_index, Bytecodes::Code bc, 151 ciInstanceKlass* loading_klass); 152 153 // Helper methods 154 bool check_klass_accessibility(ciKlass* accessing_klass, 155 Klass* resolved_klass); 156 Method* lookup_method(ciInstanceKlass* accessor, 157 ciKlass* holder, 158 Symbol* name, 159 Symbol* sig, 160 Bytecodes::Code bc, 161 constantTag tag); 162 163 // Get a ciObject from the object factory. Ensures uniqueness 164 // of ciObjects. 165 ciObject* get_object(oop o) { 166 if (o == NULL) { 167 return _null_object_instance; 168 } else { 169 return _factory->get(o); 170 } 171 } 172 173 ciSymbol* get_symbol(Symbol* o) { 174 if (o == NULL) { 175 ShouldNotReachHere(); 176 return NULL; 177 } else { 178 return _factory->get_symbol(o); 179 } 180 } 181 182 ciMetadata* get_metadata(Metadata* o) { 183 if (o == NULL) { 184 return NULL; 185 } else { 186 return _factory->get_metadata(o); 187 } 188 } 189 190 void ensure_metadata_alive(ciMetadata* m) { 191 _factory->ensure_metadata_alive(m); 192 } 193 194 ciInstance* get_instance(oop o) { 195 if (o == NULL) return NULL; 196 return get_object(o)->as_instance(); 197 } 198 ciObjArrayKlass* get_obj_array_klass(Klass* o) { 199 if (o == NULL) return NULL; 200 return get_metadata(o)->as_obj_array_klass(); 201 } 202 ciTypeArrayKlass* get_type_array_klass(Klass* o) { 203 if (o == NULL) return NULL; 204 return get_metadata(o)->as_type_array_klass(); 205 } 206 ciKlass* get_klass(Klass* o) { 207 if (o == NULL) return NULL; 208 return get_metadata(o)->as_klass(); 209 } 210 ciInstanceKlass* get_instance_klass(Klass* o) { 211 if (o == NULL) return NULL; 212 return get_metadata(o)->as_instance_klass(); 213 } 214 ciMethod* get_method(Method* o) { 215 if (o == NULL) return NULL; 216 return get_metadata(o)->as_method(); 217 } 218 ciMethodData* get_method_data(MethodData* o) { 219 if (o == NULL) return NULL; 220 return get_metadata(o)->as_method_data(); 221 } 222 223 ciMethod* get_method_from_handle(Method* method); 224 225 ciInstance* get_or_create_exception(jobject& handle, Symbol* name); 226 227 // Get a ciMethod representing either an unfound method or 228 // a method with an unloaded holder. Ensures uniqueness of 229 // the result. 230 ciMethod* get_unloaded_method(ciKlass* holder, 231 ciSymbol* name, 232 ciSymbol* signature, 233 ciInstanceKlass* accessor) { 234 ciInstanceKlass* declared_holder = get_instance_klass_for_declared_method_holder(holder); 235 return _factory->get_unloaded_method(declared_holder, name, signature, accessor); 236 } 237 238 // Get a ciKlass representing an unloaded klass. 239 // Ensures uniqueness of the result. 240 ciKlass* get_unloaded_klass(ciKlass* accessing_klass, 241 ciSymbol* name) { 242 return _factory->get_unloaded_klass(accessing_klass, name, true); 243 } 244 245 // Get a ciKlass representing an unloaded klass mirror. 246 // Result is not necessarily unique, but will be unloaded. 247 ciInstance* get_unloaded_klass_mirror(ciKlass* type) { 248 return _factory->get_unloaded_klass_mirror(type); 249 } 250 251 // Get a ciInstance representing an unresolved method handle constant. 252 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, 253 ciSymbol* name, 254 ciSymbol* signature, 255 int ref_kind) { 256 return _factory->get_unloaded_method_handle_constant(holder, name, signature, ref_kind); 257 } 258 259 // Get a ciInstance representing an unresolved method type constant. 260 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature) { 261 return _factory->get_unloaded_method_type_constant(signature); 262 } 263 264 // See if we already have an unloaded klass for the given name 265 // or return NULL if not. 266 ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) { 267 return _factory->get_unloaded_klass(accessing_klass, name, false); 268 } 269 270 // Get a ciReturnAddress corresponding to the given bci. 271 // Ensures uniqueness of the result. 272 ciReturnAddress* get_return_address(int bci) { 273 return _factory->get_return_address(bci); 274 } 275 276 // Get a ciMethodData representing the methodData for a method 277 // with none. 278 ciMethodData* get_empty_methodData() { 279 return _factory->get_empty_methodData(); 280 } 281 282 // General utility : get a buffer of some required length. 283 // Used in symbol creation. 284 char* name_buffer(int req_len); 285 286 // Is this thread currently in the VM state? 287 static bool is_in_vm(); 288 289 // Helper routine for determining the validity of a compilation with 290 // respect to method dependencies (e.g. concurrent class loading). 291 void validate_compile_task_dependencies(ciMethod* target); 292 293 public: 294 enum { 295 MethodCompilable, 296 MethodCompilable_not_at_tier, 297 MethodCompilable_never 298 }; 299 300 ciEnv(CompileTask* task, int system_dictionary_modification_counter); 301 // Used only during initialization of the ci 302 ciEnv(Arena* arena); 303 ~ciEnv(); 304 305 OopRecorder* oop_recorder() { return _oop_recorder; } 306 void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; } 307 308 DebugInformationRecorder* debug_info() { return _debug_info; } 309 void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; } 310 311 Dependencies* dependencies() { return _dependencies; } 312 void set_dependencies(Dependencies* d) { _dependencies = d; } 313 314 // This is true if the compilation is not going to produce code. 315 // (It is reasonable to retry failed compilations.) 316 bool failing() { return _failure_reason != NULL; } 317 318 // Reason this compilation is failing, such as "too many basic blocks". 319 const char* failure_reason() { return _failure_reason; } 320 321 // Return state of appropriate compilability 322 int compilable() { return _compilable; } 323 324 const char* retry_message() const { 325 switch (_compilable) { 326 case ciEnv::MethodCompilable_not_at_tier: 327 return "retry at different tier"; 328 case ciEnv::MethodCompilable_never: 329 return "not retryable"; 330 case ciEnv::MethodCompilable: 331 return NULL; 332 default: 333 ShouldNotReachHere(); 334 return NULL; 335 } 336 } 337 338 bool break_at_compile() { return _break_at_compile; } 339 void set_break_at_compile(bool z) { _break_at_compile = z; } 340 341 // Cache Jvmti state 342 void cache_jvmti_state(); 343 bool jvmti_state_changed() const; 344 bool should_retain_local_variables() const; 345 bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; } 346 bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions; } 347 348 // Cache DTrace flags 349 void cache_dtrace_flags(); 350 bool dtrace_extended_probes() const { return _dtrace_extended_probes; } 351 bool dtrace_monitor_probes() const { return _dtrace_monitor_probes; } 352 bool dtrace_method_probes() const { return _dtrace_method_probes; } 353 bool dtrace_alloc_probes() const { return _dtrace_alloc_probes; } 354 355 // The compiler task which has created this env. 356 // May be useful to find out compile_id, comp_level, etc. 357 CompileTask* task() { return _task; } 358 359 // Handy forwards to the task: 360 int comp_level(); // task()->comp_level() 361 uint compile_id(); // task()->compile_id() 362 363 // Register the result of a compilation. 364 void register_method(ciMethod* target, 365 int entry_bci, 366 CodeOffsets* offsets, 367 int orig_pc_offset, 368 CodeBuffer* code_buffer, 369 int frame_words, 370 OopMapSet* oop_map_set, 371 ExceptionHandlerTable* handler_table, 372 ImplicitExceptionTable* inc_table, 373 AbstractCompiler* compiler, 374 bool has_unsafe_access, 375 bool has_wide_vectors, 376 RTMState rtm_state = NoRTM); 377 378 379 // Access to certain well known ciObjects. 380 #define WK_KLASS_FUNC(name, ignore_s, ignore_o) \ 381 ciInstanceKlass* name() { \ 382 return _##name;\ 383 } 384 WK_KLASSES_DO(WK_KLASS_FUNC) 385 #undef WK_KLASS_FUNC 386 387 ciInstance* NullPointerException_instance() { 388 assert(_NullPointerException_instance != NULL, "initialization problem"); 389 return _NullPointerException_instance; 390 } 391 ciInstance* ArithmeticException_instance() { 392 assert(_ArithmeticException_instance != NULL, "initialization problem"); 393 return _ArithmeticException_instance; 394 } 395 396 // Lazy constructors: 397 ciInstance* ArrayIndexOutOfBoundsException_instance(); 398 ciInstance* ArrayStoreException_instance(); 399 ciInstance* ClassCastException_instance(); 400 401 ciInstance* the_null_string(); 402 ciInstance* the_min_jint_string(); 403 404 static ciSymbol* unloaded_cisymbol() { 405 return _unloaded_cisymbol; 406 } 407 static ciObjArrayKlass* unloaded_ciobjarrayklass() { 408 return _unloaded_ciobjarrayklass; 409 } 410 static ciInstanceKlass* unloaded_ciinstance_klass() { 411 return _unloaded_ciinstance_klass; 412 } 413 ciInstance* unloaded_ciinstance(); 414 415 ciKlass* find_system_klass(ciSymbol* klass_name); 416 // Note: To find a class from its name string, use ciSymbol::make, 417 // but consider adding to vmSymbols.hpp instead. 418 419 // converts the ciKlass* representing the holder of a method into a 420 // ciInstanceKlass*. This is needed since the holder of a method in 421 // the bytecodes could be an array type. Basically this converts 422 // array types into java/lang/Object and other types stay as they are. 423 static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass); 424 425 // Return the machine-level offset of o, which must be an element of a. 426 // This may be used to form constant-loading expressions in lieu of simpler encodings. 427 int array_element_offset_in_bytes(ciArray* a, ciObject* o); 428 429 // Access to the compile-lifetime allocation arena. 430 Arena* arena() { return _arena; } 431 432 // What is the current compilation environment? 433 static ciEnv* current() { return CompilerThread::current()->env(); } 434 435 // Overload with current thread argument 436 static ciEnv* current(CompilerThread *thread) { return thread->env(); } 437 438 // Per-compiler data. (Used by C2 to publish the Compile* pointer.) 439 void* compiler_data() { return _compiler_data; } 440 void set_compiler_data(void* x) { _compiler_data = x; } 441 442 // Notice that a method has been inlined in the current compile; 443 // used only for statistics. 444 void notice_inlined_method(ciMethod* method); 445 446 // Total number of bytecodes in inlined methods in this compile 447 int num_inlined_bytecodes() const; 448 449 // Output stream for logging compilation info. 450 CompileLog* log() { return _log; } 451 void set_log(CompileLog* log) { _log = log; } 452 453 // Check for changes to the system dictionary during compilation 454 bool system_dictionary_modification_counter_changed(); 455 456 void record_failure(const char* reason); // Record failure and report later 457 void report_failure(const char* reason); // Report failure immediately 458 void record_method_not_compilable(const char* reason, bool all_tiers = true); 459 void record_out_of_memory_failure(); 460 461 // RedefineClasses support 462 void metadata_do(void f(Metadata*)) { _factory->metadata_do(f); } 463 464 // Dump the compilation replay data for the ciEnv to the stream. 465 void dump_replay_data(int compile_id); 466 void dump_inline_data(int compile_id); 467 void dump_replay_data(outputStream* out); 468 void dump_replay_data_unsafe(outputStream* out); 469 void dump_compile_data(outputStream* out); 470 }; 471 472 #endif // SHARE_VM_CI_CIENV_HPP