Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciEnv.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | d25d4ca69222 1d1603768966 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 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 | |
| 0 | 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 int _compilable; | |
| 59 bool _break_at_compile; | |
| 60 int _num_inlined_bytecodes; | |
| 61 CompileTask* _task; // faster access to CompilerThread::task | |
| 62 CompileLog* _log; // faster access to CompilerThread::log | |
| 63 void* _compiler_data; // compiler-specific stuff, if any | |
| 64 | |
| 65 char* _name_buffer; | |
| 66 int _name_buffer_len; | |
| 67 | |
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68 // Cache Jvmti state |
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69 bool _jvmti_can_hotswap_or_post_breakpoint; |
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70 bool _jvmti_can_access_local_variables; |
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71 bool _jvmti_can_post_on_exceptions; |
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72 |
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73 // Cache DTrace flags |
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74 bool _dtrace_extended_probes; |
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75 bool _dtrace_monitor_probes; |
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76 bool _dtrace_method_probes; |
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77 bool _dtrace_alloc_probes; |
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78 |
| 0 | 79 // Distinguished instances of certain ciObjects.. |
| 80 static ciObject* _null_object_instance; | |
| 81 static ciMethodKlass* _method_klass_instance; | |
| 82 static ciKlassKlass* _klass_klass_instance; | |
| 83 static ciInstanceKlassKlass* _instance_klass_klass_instance; | |
| 84 static ciTypeArrayKlassKlass* _type_array_klass_klass_instance; | |
| 85 static ciObjArrayKlassKlass* _obj_array_klass_klass_instance; | |
| 86 | |
| 1142 | 87 #define WK_KLASS_DECL(name, ignore_s, ignore_o) static ciInstanceKlass* _##name; |
| 88 WK_KLASSES_DO(WK_KLASS_DECL) | |
| 89 #undef WK_KLASS_DECL | |
| 0 | 90 |
| 91 static ciSymbol* _unloaded_cisymbol; | |
| 92 static ciInstanceKlass* _unloaded_ciinstance_klass; | |
| 93 static ciObjArrayKlass* _unloaded_ciobjarrayklass; | |
| 94 | |
| 95 static jobject _ArrayIndexOutOfBoundsException_handle; | |
| 96 static jobject _ArrayStoreException_handle; | |
| 97 static jobject _ClassCastException_handle; | |
| 98 | |
| 99 ciInstance* _NullPointerException_instance; | |
| 100 ciInstance* _ArithmeticException_instance; | |
| 101 ciInstance* _ArrayIndexOutOfBoundsException_instance; | |
| 102 ciInstance* _ArrayStoreException_instance; | |
| 103 ciInstance* _ClassCastException_instance; | |
| 104 | |
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105 ciInstance* _the_null_string; // The Java string "null" |
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106 ciInstance* _the_min_jint_string; // The Java string "-2147483648" |
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107 |
| 0 | 108 // Look up a klass by name from a particular class loader (the accessor's). |
| 109 // If require_local, result must be defined in that class loader, or NULL. | |
| 110 // If !require_local, a result from remote class loader may be reported, | |
| 111 // if sufficient class loader constraints exist such that initiating | |
| 112 // a class loading request from the given loader is bound to return | |
| 113 // the class defined in the remote loader (or throw an error). | |
| 114 // | |
| 115 // Return an unloaded klass if !require_local and no class at all is found. | |
| 116 // | |
| 117 // The CI treats a klass as loaded if it is consistently defined in | |
| 118 // another loader, even if it hasn't yet been loaded in all loaders | |
| 119 // that could potentially see it via delegation. | |
| 120 ciKlass* get_klass_by_name(ciKlass* accessing_klass, | |
| 121 ciSymbol* klass_name, | |
| 122 bool require_local); | |
| 123 | |
| 124 // Constant pool access. | |
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125 ciKlass* get_klass_by_index(constantPoolHandle cpool, |
| 0 | 126 int klass_index, |
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127 bool& is_accessible, |
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128 ciInstanceKlass* loading_klass); |
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129 ciConstant get_constant_by_index(constantPoolHandle cpool, |
| 1602 | 130 int pool_index, int cache_index, |
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131 ciInstanceKlass* accessor); |
| 0 | 132 ciField* get_field_by_index(ciInstanceKlass* loading_klass, |
| 133 int field_index); | |
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134 ciMethod* get_method_by_index(constantPoolHandle cpool, |
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135 int method_index, Bytecodes::Code bc, |
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136 ciInstanceKlass* loading_klass); |
| 0 | 137 |
| 138 // Implementation methods for loading and constant pool access. | |
| 139 ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass, | |
| 140 ciSymbol* klass_name, | |
| 141 bool require_local); | |
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142 ciKlass* get_klass_by_index_impl(constantPoolHandle cpool, |
| 0 | 143 int klass_index, |
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144 bool& is_accessible, |
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145 ciInstanceKlass* loading_klass); |
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146 ciConstant get_constant_by_index_impl(constantPoolHandle cpool, |
| 1602 | 147 int pool_index, int cache_index, |
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148 ciInstanceKlass* loading_klass); |
| 0 | 149 ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass, |
| 150 int field_index); | |
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151 ciMethod* get_method_by_index_impl(constantPoolHandle cpool, |
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152 int method_index, Bytecodes::Code bc, |
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153 ciInstanceKlass* loading_klass); |
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154 ciMethod* get_fake_invokedynamic_method_impl(constantPoolHandle cpool, |
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155 int index, Bytecodes::Code bc); |
| 0 | 156 |
| 157 // Helper methods | |
| 158 bool check_klass_accessibility(ciKlass* accessing_klass, | |
| 159 klassOop resolved_klassOop); | |
| 160 methodOop lookup_method(instanceKlass* accessor, | |
| 161 instanceKlass* holder, | |
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162 Symbol* name, |
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163 Symbol* sig, |
| 0 | 164 Bytecodes::Code bc); |
| 165 | |
| 166 // Get a ciObject from the object factory. Ensures uniqueness | |
| 167 // of ciObjects. | |
| 168 ciObject* get_object(oop o) { | |
| 169 if (o == NULL) { | |
| 170 return _null_object_instance; | |
| 171 } else { | |
| 172 return _factory->get(o); | |
| 173 } | |
| 174 } | |
| 175 | |
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176 ciSymbol* get_symbol(Symbol* o) { |
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177 if (o == NULL) { |
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178 ShouldNotReachHere(); |
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179 return NULL; |
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180 } else { |
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181 return _factory->get_symbol(o); |
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182 } |
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183 } |
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184 |
| 0 | 185 ciMethod* get_method_from_handle(jobject method); |
| 186 | |
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187 ciInstance* get_or_create_exception(jobject& handle, Symbol* name); |
| 0 | 188 |
| 189 // Get a ciMethod representing either an unfound method or | |
| 190 // a method with an unloaded holder. Ensures uniqueness of | |
| 191 // the result. | |
| 192 ciMethod* get_unloaded_method(ciInstanceKlass* holder, | |
| 193 ciSymbol* name, | |
| 194 ciSymbol* signature) { | |
| 195 return _factory->get_unloaded_method(holder, name, signature); | |
| 196 } | |
| 197 | |
| 198 // Get a ciKlass representing an unloaded klass. | |
| 199 // Ensures uniqueness of the result. | |
| 200 ciKlass* get_unloaded_klass(ciKlass* accessing_klass, | |
| 201 ciSymbol* name) { | |
| 202 return _factory->get_unloaded_klass(accessing_klass, name, true); | |
| 203 } | |
| 204 | |
| 1602 | 205 // Get a ciKlass representing an unloaded klass mirror. |
| 206 // Result is not necessarily unique, but will be unloaded. | |
| 207 ciInstance* get_unloaded_klass_mirror(ciKlass* type) { | |
| 208 return _factory->get_unloaded_klass_mirror(type); | |
| 209 } | |
| 210 | |
| 211 // Get a ciInstance representing an unresolved method handle constant. | |
| 212 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, | |
| 213 ciSymbol* name, | |
| 214 ciSymbol* signature, | |
| 215 int ref_kind) { | |
| 216 return _factory->get_unloaded_method_handle_constant(holder, name, signature, ref_kind); | |
| 217 } | |
| 218 | |
| 219 // Get a ciInstance representing an unresolved method type constant. | |
| 220 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature) { | |
| 221 return _factory->get_unloaded_method_type_constant(signature); | |
| 222 } | |
| 223 | |
| 0 | 224 // See if we already have an unloaded klass for the given name |
| 225 // or return NULL if not. | |
| 226 ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) { | |
| 227 return _factory->get_unloaded_klass(accessing_klass, name, false); | |
| 228 } | |
| 229 | |
| 230 // Get a ciReturnAddress corresponding to the given bci. | |
| 231 // Ensures uniqueness of the result. | |
| 232 ciReturnAddress* get_return_address(int bci) { | |
| 233 return _factory->get_return_address(bci); | |
| 234 } | |
| 235 | |
| 236 // Get a ciMethodData representing the methodData for a method | |
| 237 // with none. | |
| 238 ciMethodData* get_empty_methodData() { | |
| 239 return _factory->get_empty_methodData(); | |
| 240 } | |
| 241 | |
| 242 // General utility : get a buffer of some required length. | |
| 243 // Used in symbol creation. | |
| 244 char* name_buffer(int req_len); | |
| 245 | |
| 246 // Is this thread currently in the VM state? | |
| 247 static bool is_in_vm(); | |
| 248 | |
| 249 // Helper routine for determining the validity of a compilation | |
| 250 // with respect to concurrent class loading. | |
| 251 void check_for_system_dictionary_modification(ciMethod* target); | |
| 252 | |
| 253 public: | |
| 254 enum { | |
| 255 MethodCompilable, | |
| 256 MethodCompilable_not_at_tier, | |
| 257 MethodCompilable_never | |
| 258 }; | |
| 259 | |
| 260 ciEnv(CompileTask* task, int system_dictionary_modification_counter); | |
| 261 // Used only during initialization of the ci | |
| 262 ciEnv(Arena* arena); | |
| 263 ~ciEnv(); | |
| 264 | |
| 265 OopRecorder* oop_recorder() { return _oop_recorder; } | |
| 266 void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; } | |
| 267 | |
| 268 DebugInformationRecorder* debug_info() { return _debug_info; } | |
| 269 void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; } | |
| 270 | |
| 271 Dependencies* dependencies() { return _dependencies; } | |
| 272 void set_dependencies(Dependencies* d) { _dependencies = d; } | |
| 273 | |
| 274 // This is true if the compilation is not going to produce code. | |
| 275 // (It is reasonable to retry failed compilations.) | |
| 276 bool failing() { return _failure_reason != NULL; } | |
| 277 | |
| 278 // Reason this compilation is failing, such as "too many basic blocks". | |
| 279 const char* failure_reason() { return _failure_reason; } | |
| 280 | |
| 281 // Return state of appropriate compilability | |
| 282 int compilable() { return _compilable; } | |
| 283 | |
| 284 bool break_at_compile() { return _break_at_compile; } | |
| 285 void set_break_at_compile(bool z) { _break_at_compile = z; } | |
| 286 | |
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287 // Cache Jvmti state |
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288 void cache_jvmti_state(); |
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289 bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; } |
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290 bool jvmti_can_access_local_variables() const { return _jvmti_can_access_local_variables; } |
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291 bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions; } |
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292 |
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293 // Cache DTrace flags |
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294 void cache_dtrace_flags(); |
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295 bool dtrace_extended_probes() const { return _dtrace_extended_probes; } |
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296 bool dtrace_monitor_probes() const { return _dtrace_monitor_probes; } |
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297 bool dtrace_method_probes() const { return _dtrace_method_probes; } |
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298 bool dtrace_alloc_probes() const { return _dtrace_alloc_probes; } |
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299 |
| 0 | 300 // The compiler task which has created this env. |
| 301 // May be useful to find out compile_id, comp_level, etc. | |
| 302 CompileTask* task() { return _task; } | |
| 303 // Handy forwards to the task: | |
| 304 int comp_level(); // task()->comp_level() | |
| 305 uint compile_id(); // task()->compile_id() | |
| 306 | |
| 307 // Register the result of a compilation. | |
| 308 void register_method(ciMethod* target, | |
| 309 int entry_bci, | |
| 310 CodeOffsets* offsets, | |
| 311 int orig_pc_offset, | |
| 312 CodeBuffer* code_buffer, | |
| 313 int frame_words, | |
| 314 OopMapSet* oop_map_set, | |
| 315 ExceptionHandlerTable* handler_table, | |
| 316 ImplicitExceptionTable* inc_table, | |
| 317 AbstractCompiler* compiler, | |
| 318 int comp_level, | |
| 319 bool has_debug_info = true, | |
| 320 bool has_unsafe_access = false); | |
| 321 | |
| 322 | |
| 323 // Access to certain well known ciObjects. | |
| 1142 | 324 #define WK_KLASS_FUNC(name, ignore_s, ignore_o) \ |
| 325 ciInstanceKlass* name() { \ | |
| 326 return _##name;\ | |
| 0 | 327 } |
| 1142 | 328 WK_KLASSES_DO(WK_KLASS_FUNC) |
| 329 #undef WK_KLASS_FUNC | |
| 330 | |
| 0 | 331 ciInstance* NullPointerException_instance() { |
| 332 assert(_NullPointerException_instance != NULL, "initialization problem"); | |
| 333 return _NullPointerException_instance; | |
| 334 } | |
| 335 ciInstance* ArithmeticException_instance() { | |
| 336 assert(_ArithmeticException_instance != NULL, "initialization problem"); | |
| 337 return _ArithmeticException_instance; | |
| 338 } | |
| 339 | |
| 340 // Lazy constructors: | |
| 341 ciInstance* ArrayIndexOutOfBoundsException_instance(); | |
| 342 ciInstance* ArrayStoreException_instance(); | |
| 343 ciInstance* ClassCastException_instance(); | |
| 344 | |
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345 ciInstance* the_null_string(); |
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346 ciInstance* the_min_jint_string(); |
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347 |
| 0 | 348 static ciSymbol* unloaded_cisymbol() { |
| 349 return _unloaded_cisymbol; | |
| 350 } | |
| 351 static ciObjArrayKlass* unloaded_ciobjarrayklass() { | |
| 352 return _unloaded_ciobjarrayklass; | |
| 353 } | |
| 354 static ciInstanceKlass* unloaded_ciinstance_klass() { | |
| 355 return _unloaded_ciinstance_klass; | |
| 356 } | |
| 357 | |
| 358 ciKlass* find_system_klass(ciSymbol* klass_name); | |
| 359 // Note: To find a class from its name string, use ciSymbol::make, | |
| 360 // but consider adding to vmSymbols.hpp instead. | |
| 361 | |
| 362 // Use this to make a holder for non-perm compile time constants. | |
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363 // The resulting array is guaranteed to satisfy "can_be_constant". |
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364 ciArray* make_system_array(GrowableArray<ciObject*>* objects); |
| 0 | 365 |
| 366 // converts the ciKlass* representing the holder of a method into a | |
| 367 // ciInstanceKlass*. This is needed since the holder of a method in | |
| 368 // the bytecodes could be an array type. Basically this converts | |
| 369 // array types into java/lang/Object and other types stay as they are. | |
| 370 static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass); | |
| 371 | |
| 372 // Return the machine-level offset of o, which must be an element of a. | |
| 373 // This may be used to form constant-loading expressions in lieu of simpler encodings. | |
| 374 int array_element_offset_in_bytes(ciArray* a, ciObject* o); | |
| 375 | |
| 376 // Access to the compile-lifetime allocation arena. | |
| 377 Arena* arena() { return _arena; } | |
| 378 | |
| 379 // What is the current compilation environment? | |
| 380 static ciEnv* current() { return CompilerThread::current()->env(); } | |
| 381 | |
| 382 // Overload with current thread argument | |
| 383 static ciEnv* current(CompilerThread *thread) { return thread->env(); } | |
| 384 | |
| 385 // Per-compiler data. (Used by C2 to publish the Compile* pointer.) | |
| 386 void* compiler_data() { return _compiler_data; } | |
| 387 void set_compiler_data(void* x) { _compiler_data = x; } | |
| 388 | |
| 389 // Notice that a method has been inlined in the current compile; | |
| 390 // used only for statistics. | |
| 391 void notice_inlined_method(ciMethod* method); | |
| 392 | |
| 393 // Total number of bytecodes in inlined methods in this compile | |
| 394 int num_inlined_bytecodes() const; | |
| 395 | |
| 396 // Output stream for logging compilation info. | |
| 397 CompileLog* log() { return _log; } | |
| 398 void set_log(CompileLog* log) { _log = log; } | |
| 399 | |
| 400 // Check for changes to the system dictionary during compilation | |
| 401 bool system_dictionary_modification_counter_changed(); | |
| 402 | |
| 403 void record_failure(const char* reason); | |
| 404 void record_method_not_compilable(const char* reason, bool all_tiers = true); | |
| 405 void record_out_of_memory_failure(); | |
| 406 }; | |
| 1972 | 407 |
| 408 #endif // SHARE_VM_CI_CIENV_HPP |