Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "abstract_method.h" |
| 18 | |
| 19 | #include "abstract_method-inl.h" |
| 20 | #include "class-inl.h" |
| 21 | #include "base/stringpiece.h" |
| 22 | #include "gc/card_table-inl.h" |
| 23 | #include "interpreter/interpreter.h" |
| 24 | #include "jni_internal.h" |
| 25 | #include "object-inl.h" |
| 26 | #include "object_array.h" |
| 27 | #include "object_array-inl.h" |
| 28 | #include "string.h" |
| 29 | #include "object_utils.h" |
| 30 | |
| 31 | namespace art { |
| 32 | namespace mirror { |
| 33 | |
| 34 | // TODO: get global references for these |
| 35 | Class* AbstractMethod::java_lang_reflect_Constructor_ = NULL; |
| 36 | Class* AbstractMethod::java_lang_reflect_Method_ = NULL; |
| 37 | |
| 38 | InvokeType AbstractMethod::GetInvokeType() const { |
| 39 | // TODO: kSuper? |
| 40 | if (GetDeclaringClass()->IsInterface()) { |
| 41 | return kInterface; |
| 42 | } else if (IsStatic()) { |
| 43 | return kStatic; |
| 44 | } else if (IsDirect()) { |
| 45 | return kDirect; |
| 46 | } else { |
| 47 | return kVirtual; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | void AbstractMethod::SetClasses(Class* java_lang_reflect_Constructor, Class* java_lang_reflect_Method) { |
| 52 | CHECK(java_lang_reflect_Constructor_ == NULL); |
| 53 | CHECK(java_lang_reflect_Constructor != NULL); |
| 54 | java_lang_reflect_Constructor_ = java_lang_reflect_Constructor; |
| 55 | |
| 56 | CHECK(java_lang_reflect_Method_ == NULL); |
| 57 | CHECK(java_lang_reflect_Method != NULL); |
| 58 | java_lang_reflect_Method_ = java_lang_reflect_Method; |
| 59 | } |
| 60 | |
| 61 | void AbstractMethod::ResetClasses() { |
| 62 | CHECK(java_lang_reflect_Constructor_ != NULL); |
| 63 | java_lang_reflect_Constructor_ = NULL; |
| 64 | |
| 65 | CHECK(java_lang_reflect_Method_ != NULL); |
| 66 | java_lang_reflect_Method_ = NULL; |
| 67 | } |
| 68 | |
| 69 | ObjectArray<String>* AbstractMethod::GetDexCacheStrings() const { |
| 70 | return GetFieldObject<ObjectArray<String>*>( |
| 71 | OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_strings_), false); |
| 72 | } |
| 73 | |
| 74 | void AbstractMethod::SetDexCacheStrings(ObjectArray<String>* new_dex_cache_strings) { |
| 75 | SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_strings_), |
| 76 | new_dex_cache_strings, false); |
| 77 | } |
| 78 | |
| 79 | ObjectArray<AbstractMethod>* AbstractMethod::GetDexCacheResolvedMethods() const { |
| 80 | return GetFieldObject<ObjectArray<AbstractMethod>*>( |
| 81 | OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_resolved_methods_), false); |
| 82 | } |
| 83 | |
| 84 | void AbstractMethod::SetDexCacheResolvedMethods(ObjectArray<AbstractMethod>* new_dex_cache_methods) { |
| 85 | SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_resolved_methods_), |
| 86 | new_dex_cache_methods, false); |
| 87 | } |
| 88 | |
| 89 | ObjectArray<Class>* AbstractMethod::GetDexCacheResolvedTypes() const { |
| 90 | return GetFieldObject<ObjectArray<Class>*>( |
| 91 | OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_resolved_types_), false); |
| 92 | } |
| 93 | |
| 94 | void AbstractMethod::SetDexCacheResolvedTypes(ObjectArray<Class>* new_dex_cache_classes) { |
| 95 | SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_resolved_types_), |
| 96 | new_dex_cache_classes, false); |
| 97 | } |
| 98 | |
| 99 | ObjectArray<StaticStorageBase>* AbstractMethod::GetDexCacheInitializedStaticStorage() const { |
| 100 | return GetFieldObject<ObjectArray<StaticStorageBase>*>( |
| 101 | OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_initialized_static_storage_), |
| 102 | false); |
| 103 | } |
| 104 | |
| 105 | void AbstractMethod::SetDexCacheInitializedStaticStorage(ObjectArray<StaticStorageBase>* new_value) { |
| 106 | SetFieldObject(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, dex_cache_initialized_static_storage_), |
| 107 | new_value, false); |
| 108 | } |
| 109 | |
| 110 | size_t AbstractMethod::NumArgRegisters(const StringPiece& shorty) { |
| 111 | CHECK_LE(1, shorty.length()); |
| 112 | uint32_t num_registers = 0; |
| 113 | for (int i = 1; i < shorty.length(); ++i) { |
| 114 | char ch = shorty[i]; |
| 115 | if (ch == 'D' || ch == 'J') { |
| 116 | num_registers += 2; |
| 117 | } else { |
| 118 | num_registers += 1; |
| 119 | } |
| 120 | } |
| 121 | return num_registers; |
| 122 | } |
| 123 | |
| 124 | bool AbstractMethod::IsProxyMethod() const { |
| 125 | return GetDeclaringClass()->IsProxyClass(); |
| 126 | } |
| 127 | |
| 128 | AbstractMethod* AbstractMethod::FindOverriddenMethod() const { |
| 129 | if (IsStatic()) { |
| 130 | return NULL; |
| 131 | } |
| 132 | Class* declaring_class = GetDeclaringClass(); |
| 133 | Class* super_class = declaring_class->GetSuperClass(); |
| 134 | uint16_t method_index = GetMethodIndex(); |
| 135 | ObjectArray<AbstractMethod>* super_class_vtable = super_class->GetVTable(); |
| 136 | AbstractMethod* result = NULL; |
| 137 | // Did this method override a super class method? If so load the result from the super class' |
| 138 | // vtable |
| 139 | if (super_class_vtable != NULL && method_index < super_class_vtable->GetLength()) { |
| 140 | result = super_class_vtable->Get(method_index); |
| 141 | } else { |
| 142 | // Method didn't override superclass method so search interfaces |
| 143 | if (IsProxyMethod()) { |
| 144 | result = GetDexCacheResolvedMethods()->Get(GetDexMethodIndex()); |
| 145 | CHECK_EQ(result, |
| 146 | Runtime::Current()->GetClassLinker()->FindMethodForProxy(GetDeclaringClass(), this)); |
| 147 | } else { |
| 148 | MethodHelper mh(this); |
| 149 | MethodHelper interface_mh; |
| 150 | IfTable* iftable = GetDeclaringClass()->GetIfTable(); |
| 151 | for (size_t i = 0; i < iftable->Count() && result == NULL; i++) { |
| 152 | Class* interface = iftable->GetInterface(i); |
| 153 | for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { |
| 154 | AbstractMethod* interface_method = interface->GetVirtualMethod(j); |
| 155 | interface_mh.ChangeMethod(interface_method); |
| 156 | if (mh.HasSameNameAndSignature(&interface_mh)) { |
| 157 | result = interface_method; |
| 158 | break; |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | #ifndef NDEBUG |
| 165 | MethodHelper result_mh(result); |
| 166 | DCHECK(result == NULL || MethodHelper(this).HasSameNameAndSignature(&result_mh)); |
| 167 | #endif |
| 168 | return result; |
| 169 | } |
| 170 | |
| 171 | static const void* GetOatCode(const AbstractMethod* m) |
| 172 | SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| 173 | Runtime* runtime = Runtime::Current(); |
| 174 | const void* code = m->GetCode(); |
| 175 | // Peel off any method tracing trampoline. |
| 176 | if (runtime->IsMethodTracingActive() && runtime->GetInstrumentation()->GetSavedCodeFromMap(m) != NULL) { |
| 177 | code = runtime->GetInstrumentation()->GetSavedCodeFromMap(m); |
| 178 | } |
| 179 | // Peel off any resolution stub. |
| 180 | if (code == runtime->GetResolutionStubArray(Runtime::kStaticMethod)->GetData()) { |
| 181 | code = runtime->GetClassLinker()->GetOatCodeFor(m); |
| 182 | } |
| 183 | return code; |
| 184 | } |
| 185 | |
| 186 | uintptr_t AbstractMethod::NativePcOffset(const uintptr_t pc) const { |
| 187 | return pc - reinterpret_cast<uintptr_t>(GetOatCode(this)); |
| 188 | } |
| 189 | |
| 190 | // Find the lowest-address native safepoint pc for a given dex pc |
| 191 | uintptr_t AbstractMethod::ToFirstNativeSafepointPc(const uint32_t dex_pc) const { |
Ian Rogers | c928de9 | 2013-02-27 14:30:44 -0800 | [diff] [blame^] | 192 | #if !defined(ART_USE_PORTABLE_COMPILER) |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 193 | const uint32_t* mapping_table = GetPcToDexMappingTable(); |
| 194 | if (mapping_table == NULL) { |
| 195 | DCHECK(IsNative() || IsCalleeSaveMethod() || IsProxyMethod()) << PrettyMethod(this); |
| 196 | return DexFile::kDexNoIndex; // Special no mapping case |
| 197 | } |
| 198 | size_t mapping_table_length = GetPcToDexMappingTableLength(); |
| 199 | for (size_t i = 0; i < mapping_table_length; i += 2) { |
| 200 | if (mapping_table[i + 1] == dex_pc) { |
| 201 | return mapping_table[i] + reinterpret_cast<uintptr_t>(GetOatCode(this)); |
| 202 | } |
| 203 | } |
| 204 | LOG(FATAL) << "Failed to find native offset for dex pc 0x" << std::hex << dex_pc |
| 205 | << " in " << PrettyMethod(this); |
| 206 | return 0; |
| 207 | #else |
| 208 | // Compiler LLVM doesn't use the machine pc, we just use dex pc instead. |
| 209 | return static_cast<uint32_t>(dex_pc); |
| 210 | #endif |
| 211 | } |
| 212 | |
| 213 | uint32_t AbstractMethod::ToDexPc(const uintptr_t pc) const { |
Ian Rogers | c928de9 | 2013-02-27 14:30:44 -0800 | [diff] [blame^] | 214 | #if !defined(ART_USE_PORTABLE_COMPILER) |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 215 | const uint32_t* mapping_table = GetPcToDexMappingTable(); |
| 216 | if (mapping_table == NULL) { |
| 217 | DCHECK(IsNative() || IsCalleeSaveMethod() || IsProxyMethod()) << PrettyMethod(this); |
| 218 | return DexFile::kDexNoIndex; // Special no mapping case |
| 219 | } |
| 220 | size_t mapping_table_length = GetPcToDexMappingTableLength(); |
| 221 | uint32_t sought_offset = pc - reinterpret_cast<uintptr_t>(GetOatCode(this)); |
| 222 | for (size_t i = 0; i < mapping_table_length; i += 2) { |
| 223 | if (mapping_table[i] == sought_offset) { |
| 224 | return mapping_table[i + 1]; |
| 225 | } |
| 226 | } |
| 227 | LOG(ERROR) << "Failed to find Dex offset for PC offset " << reinterpret_cast<void*>(sought_offset) |
| 228 | << "(PC " << reinterpret_cast<void*>(pc) << ") in " << PrettyMethod(this); |
| 229 | return DexFile::kDexNoIndex; |
| 230 | #else |
| 231 | // Compiler LLVM doesn't use the machine pc, we just use dex pc instead. |
| 232 | return static_cast<uint32_t>(pc); |
| 233 | #endif |
| 234 | } |
| 235 | |
| 236 | uintptr_t AbstractMethod::ToNativePc(const uint32_t dex_pc) const { |
| 237 | const uint32_t* mapping_table = GetDexToPcMappingTable(); |
| 238 | if (mapping_table == NULL) { |
| 239 | DCHECK_EQ(dex_pc, 0U); |
| 240 | return 0; // Special no mapping/pc == 0 case |
| 241 | } |
| 242 | size_t mapping_table_length = GetDexToPcMappingTableLength(); |
| 243 | for (size_t i = 0; i < mapping_table_length; i += 2) { |
| 244 | uint32_t map_offset = mapping_table[i]; |
| 245 | uint32_t map_dex_offset = mapping_table[i + 1]; |
| 246 | if (map_dex_offset == dex_pc) { |
| 247 | return reinterpret_cast<uintptr_t>(GetOatCode(this)) + map_offset; |
| 248 | } |
| 249 | } |
| 250 | LOG(FATAL) << "Looking up Dex PC not contained in method, 0x" << std::hex << dex_pc |
| 251 | << " in " << PrettyMethod(this); |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | uint32_t AbstractMethod::FindCatchBlock(Class* exception_type, uint32_t dex_pc) const { |
| 256 | MethodHelper mh(this); |
| 257 | const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| 258 | // Iterate over the catch handlers associated with dex_pc |
| 259 | for (CatchHandlerIterator it(*code_item, dex_pc); it.HasNext(); it.Next()) { |
| 260 | uint16_t iter_type_idx = it.GetHandlerTypeIndex(); |
| 261 | // Catch all case |
| 262 | if (iter_type_idx == DexFile::kDexNoIndex16) { |
| 263 | return it.GetHandlerAddress(); |
| 264 | } |
| 265 | // Does this catch exception type apply? |
| 266 | Class* iter_exception_type = mh.GetDexCacheResolvedType(iter_type_idx); |
| 267 | if (iter_exception_type == NULL) { |
| 268 | // The verifier should take care of resolving all exception classes early |
| 269 | LOG(WARNING) << "Unresolved exception class when finding catch block: " |
| 270 | << mh.GetTypeDescriptorFromTypeIdx(iter_type_idx); |
| 271 | } else if (iter_exception_type->IsAssignableFrom(exception_type)) { |
| 272 | return it.GetHandlerAddress(); |
| 273 | } |
| 274 | } |
| 275 | // Handler not found |
| 276 | return DexFile::kDexNoIndex; |
| 277 | } |
| 278 | |
| 279 | void AbstractMethod::Invoke(Thread* self, Object* receiver, JValue* args, JValue* result) { |
| 280 | if (kIsDebugBuild) { |
| 281 | self->AssertThreadSuspensionIsAllowable(); |
| 282 | CHECK_EQ(kRunnable, self->GetState()); |
| 283 | } |
| 284 | |
| 285 | // Push a transition back into managed code onto the linked list in thread. |
| 286 | ManagedStack fragment; |
| 287 | self->PushManagedStackFragment(&fragment); |
| 288 | |
| 289 | // Call the invoke stub associated with the method. |
| 290 | // Pass everything as arguments. |
| 291 | AbstractMethod::InvokeStub* stub = GetInvokeStub(); |
| 292 | |
| 293 | if (UNLIKELY(!Runtime::Current()->IsStarted())){ |
| 294 | LOG(INFO) << "Not invoking " << PrettyMethod(this) << " for a runtime that isn't started"; |
| 295 | if (result != NULL) { |
| 296 | result->SetJ(0); |
| 297 | } |
| 298 | } else { |
| 299 | bool interpret = self->ReadFlag(kEnterInterpreter) && !IsNative() && !IsProxyMethod(); |
| 300 | const bool kLogInvocationStartAndReturn = false; |
| 301 | if (!interpret && GetCode() != NULL && stub != NULL) { |
| 302 | if (kLogInvocationStartAndReturn) { |
| 303 | LOG(INFO) << StringPrintf("Invoking '%s' code=%p stub=%p", |
| 304 | PrettyMethod(this).c_str(), GetCode(), stub); |
| 305 | } |
| 306 | (*stub)(this, receiver, self, args, result); |
Jeff Hao | 11ffc2d | 2013-02-01 11:52:17 -0800 | [diff] [blame] | 307 | if (UNLIKELY(reinterpret_cast<int32_t>(self->GetException()) == -1)) { |
| 308 | // Unusual case where we were running LLVM generated code and an |
| 309 | // exception was thrown to force the activations to be removed from the |
| 310 | // stack. Continue execution in the interpreter. |
| 311 | JValue value; |
| 312 | self->ClearException(); |
| 313 | ShadowFrame* shadow_frame = self->GetAndClearDeoptimizationShadowFrame(&value); |
| 314 | self->SetTopOfShadowStack(shadow_frame); |
| 315 | interpreter::EnterInterpreterFromLLVM(self, shadow_frame, result); |
| 316 | } |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 317 | if (kLogInvocationStartAndReturn) { |
| 318 | LOG(INFO) << StringPrintf("Returned '%s' code=%p stub=%p", |
| 319 | PrettyMethod(this).c_str(), GetCode(), stub); |
| 320 | } |
| 321 | } else { |
| 322 | const bool kInterpretMethodsWithNoCode = false; |
| 323 | if (interpret || kInterpretMethodsWithNoCode) { |
| 324 | if (kLogInvocationStartAndReturn) { |
| 325 | LOG(INFO) << "Interpreting " << PrettyMethod(this) << "'"; |
| 326 | } |
| 327 | art::interpreter::EnterInterpreterFromInvoke(self, this, receiver, args, result); |
| 328 | if (kLogInvocationStartAndReturn) { |
| 329 | LOG(INFO) << "Returned '" << PrettyMethod(this) << "'"; |
| 330 | } |
| 331 | } else { |
| 332 | LOG(INFO) << "Not invoking '" << PrettyMethod(this) |
| 333 | << "' code=" << reinterpret_cast<const void*>(GetCode()) |
| 334 | << " stub=" << reinterpret_cast<void*>(stub); |
| 335 | if (result != NULL) { |
| 336 | result->SetJ(0); |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | // Pop transition. |
| 343 | self->PopManagedStackFragment(fragment); |
| 344 | } |
| 345 | |
| 346 | bool AbstractMethod::IsRegistered() const { |
| 347 | void* native_method = GetFieldPtr<void*>(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, native_method_), false); |
| 348 | CHECK(native_method != NULL); |
| 349 | void* jni_stub = Runtime::Current()->GetJniDlsymLookupStub()->GetData(); |
| 350 | return native_method != jni_stub; |
| 351 | } |
| 352 | |
| 353 | void AbstractMethod::RegisterNative(Thread* self, const void* native_method) { |
| 354 | DCHECK(Thread::Current() == self); |
| 355 | CHECK(IsNative()) << PrettyMethod(this); |
| 356 | CHECK(native_method != NULL) << PrettyMethod(this); |
| 357 | if (!self->GetJniEnv()->vm->work_around_app_jni_bugs) { |
| 358 | SetNativeMethod(native_method); |
| 359 | } else { |
| 360 | // We've been asked to associate this method with the given native method but are working |
| 361 | // around JNI bugs, that include not giving Object** SIRT references to native methods. Direct |
| 362 | // the native method to runtime support and store the target somewhere runtime support will |
| 363 | // find it. |
Ian Rogers | c928de9 | 2013-02-27 14:30:44 -0800 | [diff] [blame^] | 364 | #if defined(__arm__) && !defined(ART_USE_PORTABLE_COMPILER) |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 365 | SetNativeMethod(native_method); |
| 366 | #else |
| 367 | UNIMPLEMENTED(FATAL); |
| 368 | #endif |
| 369 | SetFieldPtr<const uint8_t*>(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, native_gc_map_), |
| 370 | reinterpret_cast<const uint8_t*>(native_method), false); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | void AbstractMethod::UnregisterNative(Thread* self) { |
| 375 | CHECK(IsNative()) << PrettyMethod(this); |
| 376 | // restore stub to lookup native pointer via dlsym |
| 377 | RegisterNative(self, Runtime::Current()->GetJniDlsymLookupStub()->GetData()); |
| 378 | } |
| 379 | |
| 380 | void AbstractMethod::SetNativeMethod(const void* native_method) { |
| 381 | SetFieldPtr<const void*>(OFFSET_OF_OBJECT_MEMBER(AbstractMethod, native_method_), |
| 382 | native_method, false); |
| 383 | } |
| 384 | |
| 385 | } // namespace mirror |
| 386 | } // namespace art |