| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "interpreter_common.h" |
| #include "mirror/array-inl.h" |
| |
| namespace art { |
| namespace interpreter { |
| |
| static void UnstartedRuntimeInvoke(Thread* self, MethodHelper& mh, |
| const DexFile::CodeItem* code_item, ShadowFrame* shadow_frame, |
| JValue* result, size_t arg_offset) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); |
| |
| // Assign register 'src_reg' from shadow_frame to register 'dest_reg' into new_shadow_frame. |
| static inline void AssignRegister(ShadowFrame* new_shadow_frame, const ShadowFrame& shadow_frame, |
| size_t dest_reg, size_t src_reg) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // If both register locations contains the same value, the register probably holds a reference. |
| // Uint required, so that sign extension does not make this wrong on 64b systems |
| uint32_t src_value = shadow_frame.GetVReg(src_reg); |
| mirror::Object* o = shadow_frame.GetVRegReference<kVerifyNone>(src_reg); |
| if (src_value == reinterpret_cast<uintptr_t>(o)) { |
| new_shadow_frame->SetVRegReference(dest_reg, o); |
| } else { |
| new_shadow_frame->SetVReg(dest_reg, src_value); |
| } |
| } |
| |
| void AbortTransaction(Thread* self, const char* fmt, ...) { |
| CHECK(Runtime::Current()->IsActiveTransaction()); |
| // Throw an exception so we can abort the transaction and undo every change. |
| va_list args; |
| va_start(args, fmt); |
| self->ThrowNewExceptionV(self->GetCurrentLocationForThrow(), "Ljava/lang/InternalError;", fmt, |
| args); |
| va_end(args); |
| } |
| |
| template<bool is_range, bool do_assignability_check> |
| bool DoCall(ArtMethod* method, Thread* self, ShadowFrame& shadow_frame, |
| const Instruction* inst, uint16_t inst_data, JValue* result) { |
| // Compute method information. |
| MethodHelper mh(method); |
| const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| const uint16_t num_ins = (is_range) ? inst->VRegA_3rc(inst_data) : inst->VRegA_35c(inst_data); |
| uint16_t num_regs; |
| if (LIKELY(code_item != NULL)) { |
| num_regs = code_item->registers_size_; |
| DCHECK_EQ(num_ins, code_item->ins_size_); |
| } else { |
| DCHECK(method->IsNative() || method->IsProxyMethod()); |
| num_regs = num_ins; |
| } |
| |
| // Allocate shadow frame on the stack. |
| const char* old_cause = self->StartAssertNoThreadSuspension("DoCall"); |
| void* memory = alloca(ShadowFrame::ComputeSize(num_regs)); |
| ShadowFrame* new_shadow_frame(ShadowFrame::Create(num_regs, &shadow_frame, method, 0, memory)); |
| |
| // Initialize new shadow frame. |
| const size_t first_dest_reg = num_regs - num_ins; |
| if (do_assignability_check) { |
| // Slow path: we need to do runtime check on reference assignment. We need to load the shorty |
| // to get the exact type of each reference argument. |
| const DexFile::TypeList* params = mh.GetParameterTypeList(); |
| const char* shorty = mh.GetShorty(); |
| |
| // TODO: find a cleaner way to separate non-range and range information without duplicating code. |
| uint32_t arg[5]; // only used in invoke-XXX. |
| uint32_t vregC; // only used in invoke-XXX-range. |
| if (is_range) { |
| vregC = inst->VRegC_3rc(); |
| } else { |
| inst->GetArgs(arg, inst_data); |
| } |
| |
| // Handle receiver apart since it's not part of the shorty. |
| size_t dest_reg = first_dest_reg; |
| size_t arg_offset = 0; |
| if (!method->IsStatic()) { |
| size_t receiver_reg = (is_range) ? vregC : arg[0]; |
| new_shadow_frame->SetVRegReference(dest_reg, shadow_frame.GetVRegReference(receiver_reg)); |
| ++dest_reg; |
| ++arg_offset; |
| } |
| for (uint32_t shorty_pos = 0; dest_reg < num_regs; ++shorty_pos, ++dest_reg, ++arg_offset) { |
| DCHECK_LT(shorty_pos + 1, mh.GetShortyLength()); |
| const size_t src_reg = (is_range) ? vregC + arg_offset : arg[arg_offset]; |
| switch (shorty[shorty_pos + 1]) { |
| case 'L': { |
| Object* o = shadow_frame.GetVRegReference(src_reg); |
| if (do_assignability_check && o != NULL) { |
| Class* arg_type = mh.GetClassFromTypeIdx(params->GetTypeItem(shorty_pos).type_idx_); |
| if (arg_type == NULL) { |
| CHECK(self->IsExceptionPending()); |
| self->EndAssertNoThreadSuspension(old_cause); |
| return false; |
| } |
| if (!o->VerifierInstanceOf(arg_type)) { |
| self->EndAssertNoThreadSuspension(old_cause); |
| // This should never happen. |
| self->ThrowNewExceptionF(self->GetCurrentLocationForThrow(), |
| "Ljava/lang/VirtualMachineError;", |
| "Invoking %s with bad arg %d, type '%s' not instance of '%s'", |
| mh.GetName(), shorty_pos, |
| ClassHelper(o->GetClass()).GetDescriptor(), |
| ClassHelper(arg_type).GetDescriptor()); |
| return false; |
| } |
| } |
| new_shadow_frame->SetVRegReference(dest_reg, o); |
| break; |
| } |
| case 'J': case 'D': { |
| uint64_t wide_value = (static_cast<uint64_t>(shadow_frame.GetVReg(src_reg + 1)) << 32) | |
| static_cast<uint32_t>(shadow_frame.GetVReg(src_reg)); |
| new_shadow_frame->SetVRegLong(dest_reg, wide_value); |
| ++dest_reg; |
| ++arg_offset; |
| break; |
| } |
| default: |
| new_shadow_frame->SetVReg(dest_reg, shadow_frame.GetVReg(src_reg)); |
| break; |
| } |
| } |
| } else { |
| // Fast path: no extra checks. |
| if (is_range) { |
| const uint16_t first_src_reg = inst->VRegC_3rc(); |
| for (size_t src_reg = first_src_reg, dest_reg = first_dest_reg; dest_reg < num_regs; |
| ++dest_reg, ++src_reg) { |
| AssignRegister(new_shadow_frame, shadow_frame, dest_reg, src_reg); |
| } |
| } else { |
| DCHECK_LE(num_ins, 5U); |
| uint16_t regList = inst->Fetch16(2); |
| uint16_t count = num_ins; |
| if (count == 5) { |
| AssignRegister(new_shadow_frame, shadow_frame, first_dest_reg + 4U, (inst_data >> 8) & 0x0f); |
| --count; |
| } |
| for (size_t arg_index = 0; arg_index < count; ++arg_index, regList >>= 4) { |
| AssignRegister(new_shadow_frame, shadow_frame, first_dest_reg + arg_index, regList & 0x0f); |
| } |
| } |
| } |
| self->EndAssertNoThreadSuspension(old_cause); |
| |
| // Do the call now. |
| if (LIKELY(Runtime::Current()->IsStarted())) { |
| if (kIsDebugBuild && method->GetEntryPointFromInterpreter() == nullptr) { |
| LOG(FATAL) << "Attempt to invoke non-executable method: " << PrettyMethod(method); |
| } |
| if (kIsDebugBuild && Runtime::Current()->GetInstrumentation()->IsForcedInterpretOnly() && |
| !method->IsNative() && !method->IsProxyMethod() && |
| method->GetEntryPointFromInterpreter() == artInterpreterToCompiledCodeBridge) { |
| LOG(FATAL) << "Attempt to call compiled code when -Xint: " << PrettyMethod(method); |
| } |
| (method->GetEntryPointFromInterpreter())(self, mh, code_item, new_shadow_frame, result); |
| } else { |
| UnstartedRuntimeInvoke(self, mh, code_item, new_shadow_frame, result, first_dest_reg); |
| } |
| return !self->IsExceptionPending(); |
| } |
| |
| template <bool is_range, bool do_access_check, bool transaction_active> |
| bool DoFilledNewArray(const Instruction* inst, const ShadowFrame& shadow_frame, |
| Thread* self, JValue* result) { |
| DCHECK(inst->Opcode() == Instruction::FILLED_NEW_ARRAY || |
| inst->Opcode() == Instruction::FILLED_NEW_ARRAY_RANGE); |
| const int32_t length = is_range ? inst->VRegA_3rc() : inst->VRegA_35c(); |
| if (!is_range) { |
| // Checks FILLED_NEW_ARRAY's length does not exceed 5 arguments. |
| CHECK_LE(length, 5); |
| } |
| if (UNLIKELY(length < 0)) { |
| ThrowNegativeArraySizeException(length); |
| return false; |
| } |
| uint16_t type_idx = is_range ? inst->VRegB_3rc() : inst->VRegB_35c(); |
| Class* arrayClass = ResolveVerifyAndClinit(type_idx, shadow_frame.GetMethod(), |
| self, false, do_access_check); |
| if (UNLIKELY(arrayClass == NULL)) { |
| DCHECK(self->IsExceptionPending()); |
| return false; |
| } |
| CHECK(arrayClass->IsArrayClass()); |
| Class* componentClass = arrayClass->GetComponentType(); |
| if (UNLIKELY(componentClass->IsPrimitive() && !componentClass->IsPrimitiveInt())) { |
| if (componentClass->IsPrimitiveLong() || componentClass->IsPrimitiveDouble()) { |
| ThrowRuntimeException("Bad filled array request for type %s", |
| PrettyDescriptor(componentClass).c_str()); |
| } else { |
| self->ThrowNewExceptionF(shadow_frame.GetCurrentLocationForThrow(), |
| "Ljava/lang/InternalError;", |
| "Found type %s; filled-new-array not implemented for anything but 'int'", |
| PrettyDescriptor(componentClass).c_str()); |
| } |
| return false; |
| } |
| Object* newArray = Array::Alloc<true>(self, arrayClass, length, arrayClass->GetComponentSize(), |
| Runtime::Current()->GetHeap()->GetCurrentAllocator()); |
| if (UNLIKELY(newArray == NULL)) { |
| DCHECK(self->IsExceptionPending()); |
| return false; |
| } |
| uint32_t arg[5]; // only used in filled-new-array. |
| uint32_t vregC; // only used in filled-new-array-range. |
| if (is_range) { |
| vregC = inst->VRegC_3rc(); |
| } else { |
| inst->GetArgs(arg); |
| } |
| const bool is_primitive_int_component = componentClass->IsPrimitiveInt(); |
| for (int32_t i = 0; i < length; ++i) { |
| size_t src_reg = is_range ? vregC + i : arg[i]; |
| if (is_primitive_int_component) { |
| newArray->AsIntArray()->SetWithoutChecks<transaction_active>(i, shadow_frame.GetVReg(src_reg)); |
| } else { |
| newArray->AsObjectArray<Object>()->SetWithoutChecks<transaction_active>(i, shadow_frame.GetVRegReference(src_reg)); |
| } |
| } |
| |
| result->SetL(newArray); |
| return true; |
| } |
| |
| // TODO fix thread analysis: should be SHARED_LOCKS_REQUIRED(Locks::mutator_lock_). |
| template<typename T> |
| static void RecordArrayElementsInTransactionImpl(mirror::PrimitiveArray<T>* array, int32_t count) |
| NO_THREAD_SAFETY_ANALYSIS { |
| Runtime* runtime = Runtime::Current(); |
| for (int32_t i = 0; i < count; ++i) { |
| runtime->RecordWriteArray(array, i, array->GetWithoutChecks(i)); |
| } |
| } |
| |
| void RecordArrayElementsInTransaction(mirror::Array* array, int32_t count) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| DCHECK(Runtime::Current()->IsActiveTransaction()); |
| DCHECK(array != nullptr); |
| DCHECK_LE(count, array->GetLength()); |
| Primitive::Type primitive_component_type = array->GetClass()->GetComponentType()->GetPrimitiveType(); |
| switch (primitive_component_type) { |
| case Primitive::kPrimBoolean: |
| RecordArrayElementsInTransactionImpl(array->AsBooleanArray(), count); |
| break; |
| case Primitive::kPrimByte: |
| RecordArrayElementsInTransactionImpl(array->AsByteArray(), count); |
| break; |
| case Primitive::kPrimChar: |
| RecordArrayElementsInTransactionImpl(array->AsCharArray(), count); |
| break; |
| case Primitive::kPrimShort: |
| RecordArrayElementsInTransactionImpl(array->AsShortArray(), count); |
| break; |
| case Primitive::kPrimInt: |
| case Primitive::kPrimFloat: |
| RecordArrayElementsInTransactionImpl(array->AsIntArray(), count); |
| break; |
| case Primitive::kPrimLong: |
| case Primitive::kPrimDouble: |
| RecordArrayElementsInTransactionImpl(array->AsLongArray(), count); |
| break; |
| default: |
| LOG(FATAL) << "Unsupported primitive type " << primitive_component_type |
| << " in fill-array-data"; |
| break; |
| } |
| } |
| |
| static void UnstartedRuntimeInvoke(Thread* self, MethodHelper& mh, |
| const DexFile::CodeItem* code_item, ShadowFrame* shadow_frame, |
| JValue* result, size_t arg_offset) { |
| // In a runtime that's not started we intercept certain methods to avoid complicated dependency |
| // problems in core libraries. |
| std::string name(PrettyMethod(shadow_frame->GetMethod())); |
| if (name == "java.lang.Class java.lang.Class.forName(java.lang.String)" |
| || name == "java.lang.Class java.lang.VMClassLoader.loadClass(java.lang.String, boolean)") { |
| // TODO Class#forName should actually call Class::EnsureInitialized always. Support for the |
| // other variants that take more arguments should also be added. |
| std::string descriptor(DotToDescriptor(shadow_frame->GetVRegReference(arg_offset)->AsString()->ToModifiedUtf8().c_str())); |
| |
| SirtRef<ClassLoader> class_loader(self, nullptr); // shadow_frame.GetMethod()->GetDeclaringClass()->GetClassLoader(); |
| Class* found = Runtime::Current()->GetClassLinker()->FindClass(self, descriptor.c_str(), |
| class_loader); |
| CHECK(found != NULL) << "Class.forName failed in un-started runtime for class: " |
| << PrettyDescriptor(descriptor); |
| result->SetL(found); |
| } else if (name == "java.lang.Class java.lang.VMClassLoader.findLoadedClass(java.lang.ClassLoader, java.lang.String)") { |
| SirtRef<ClassLoader> class_loader(self, down_cast<mirror::ClassLoader*>(shadow_frame->GetVRegReference(arg_offset))); |
| std::string descriptor(DotToDescriptor(shadow_frame->GetVRegReference(arg_offset + 1)->AsString()->ToModifiedUtf8().c_str())); |
| |
| Class* found = Runtime::Current()->GetClassLinker()->FindClass(self, descriptor.c_str(), |
| class_loader); |
| result->SetL(found); |
| } else if (name == "java.lang.Object java.lang.Class.newInstance()") { |
| Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass(); |
| ArtMethod* c = klass->FindDeclaredDirectMethod("<init>", "()V"); |
| CHECK(c != NULL); |
| SirtRef<Object> obj(self, klass->AllocObject(self)); |
| CHECK(obj.get() != NULL); |
| EnterInterpreterFromInvoke(self, c, obj.get(), NULL, NULL); |
| result->SetL(obj.get()); |
| } else if (name == "java.lang.reflect.Field java.lang.Class.getDeclaredField(java.lang.String)") { |
| // Special managed code cut-out to allow field lookup in a un-started runtime that'd fail |
| // going the reflective Dex way. |
| Class* klass = shadow_frame->GetVRegReference(arg_offset)->AsClass(); |
| String* name = shadow_frame->GetVRegReference(arg_offset + 1)->AsString(); |
| ArtField* found = NULL; |
| FieldHelper fh; |
| ObjectArray<ArtField>* fields = klass->GetIFields(); |
| for (int32_t i = 0; i < fields->GetLength() && found == NULL; ++i) { |
| ArtField* f = fields->Get(i); |
| fh.ChangeField(f); |
| if (name->Equals(fh.GetName())) { |
| found = f; |
| } |
| } |
| if (found == NULL) { |
| fields = klass->GetSFields(); |
| for (int32_t i = 0; i < fields->GetLength() && found == NULL; ++i) { |
| ArtField* f = fields->Get(i); |
| fh.ChangeField(f); |
| if (name->Equals(fh.GetName())) { |
| found = f; |
| } |
| } |
| } |
| CHECK(found != NULL) |
| << "Failed to find field in Class.getDeclaredField in un-started runtime. name=" |
| << name->ToModifiedUtf8() << " class=" << PrettyDescriptor(klass); |
| // TODO: getDeclaredField calls GetType once the field is found to ensure a |
| // NoClassDefFoundError is thrown if the field's type cannot be resolved. |
| Class* jlr_Field = self->DecodeJObject(WellKnownClasses::java_lang_reflect_Field)->AsClass(); |
| SirtRef<Object> field(self, jlr_Field->AllocNonMovableObject(self)); |
| CHECK(field.get() != NULL); |
| ArtMethod* c = jlr_Field->FindDeclaredDirectMethod("<init>", "(Ljava/lang/reflect/ArtField;)V"); |
| uint32_t args[1]; |
| args[0] = StackReference<mirror::Object>::FromMirrorPtr(found).AsVRegValue(); |
| EnterInterpreterFromInvoke(self, c, field.get(), args, NULL); |
| result->SetL(field.get()); |
| } else if (name == "void java.lang.System.arraycopy(java.lang.Object, int, java.lang.Object, int, int)" || |
| name == "void java.lang.System.arraycopy(char[], int, char[], int, int)") { |
| // Special case array copying without initializing System. |
| Class* ctype = shadow_frame->GetVRegReference(arg_offset)->GetClass()->GetComponentType(); |
| jint srcPos = shadow_frame->GetVReg(arg_offset + 1); |
| jint dstPos = shadow_frame->GetVReg(arg_offset + 3); |
| jint length = shadow_frame->GetVReg(arg_offset + 4); |
| if (!ctype->IsPrimitive()) { |
| ObjectArray<Object>* src = shadow_frame->GetVRegReference(arg_offset)->AsObjectArray<Object>(); |
| ObjectArray<Object>* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsObjectArray<Object>(); |
| for (jint i = 0; i < length; ++i) { |
| dst->Set(dstPos + i, src->Get(srcPos + i)); |
| } |
| } else if (ctype->IsPrimitiveChar()) { |
| CharArray* src = shadow_frame->GetVRegReference(arg_offset)->AsCharArray(); |
| CharArray* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsCharArray(); |
| for (jint i = 0; i < length; ++i) { |
| dst->Set(dstPos + i, src->Get(srcPos + i)); |
| } |
| } else if (ctype->IsPrimitiveInt()) { |
| IntArray* src = shadow_frame->GetVRegReference(arg_offset)->AsIntArray(); |
| IntArray* dst = shadow_frame->GetVRegReference(arg_offset + 2)->AsIntArray(); |
| for (jint i = 0; i < length; ++i) { |
| dst->Set(dstPos + i, src->Get(srcPos + i)); |
| } |
| } else { |
| UNIMPLEMENTED(FATAL) << "System.arraycopy of unexpected type: " << PrettyDescriptor(ctype); |
| } |
| } else { |
| // Not special, continue with regular interpreter execution. |
| artInterpreterToInterpreterBridge(self, mh, code_item, shadow_frame, result); |
| } |
| } |
| |
| // Explicit DoCall template function declarations. |
| #define EXPLICIT_DO_CALL_TEMPLATE_DECL(_is_range, _do_assignability_check) \ |
| template SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) \ |
| bool DoCall<_is_range, _do_assignability_check>(ArtMethod* method, Thread* self, \ |
| ShadowFrame& shadow_frame, \ |
| const Instruction* inst, uint16_t inst_data, \ |
| JValue* result) |
| EXPLICIT_DO_CALL_TEMPLATE_DECL(false, false); |
| EXPLICIT_DO_CALL_TEMPLATE_DECL(false, true); |
| EXPLICIT_DO_CALL_TEMPLATE_DECL(true, false); |
| EXPLICIT_DO_CALL_TEMPLATE_DECL(true, true); |
| #undef EXPLICIT_DO_CALL_TEMPLATE_DECL |
| |
| // Explicit DoFilledNewArray template function declarations. |
| #define EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(_is_range_, _check, _transaction_active) \ |
| template SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) \ |
| bool DoFilledNewArray<_is_range_, _check, _transaction_active>(const Instruction* inst, \ |
| const ShadowFrame& shadow_frame, \ |
| Thread* self, JValue* result) |
| #define EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL(_transaction_active) \ |
| EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(false, false, _transaction_active); \ |
| EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(false, true, _transaction_active); \ |
| EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(true, false, _transaction_active); \ |
| EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL(true, true, _transaction_active) |
| EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL(false); |
| EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL(true); |
| #undef EXPLICIT_DO_FILLED_NEW_ARRAY_ALL_TEMPLATE_DECL |
| #undef EXPLICIT_DO_FILLED_NEW_ARRAY_TEMPLATE_DECL |
| |
| } // namespace interpreter |
| } // namespace art |