| /* |
| * 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. |
| */ |
| |
| #ifndef ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_ |
| #define ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_ |
| |
| #include "entrypoint_utils.h" |
| |
| #include "art_method.h" |
| #include "class_linker-inl.h" |
| #include "common_throws.h" |
| #include "dex_file.h" |
| #include "entrypoints/quick/callee_save_frame.h" |
| #include "handle_scope-inl.h" |
| #include "indirect_reference_table.h" |
| #include "invoke_type.h" |
| #include "jni_internal.h" |
| #include "mirror/array.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/throwable.h" |
| #include "nth_caller_visitor.h" |
| #include "runtime.h" |
| #include "stack_map.h" |
| #include "thread.h" |
| |
| namespace art { |
| |
| inline ArtMethod* GetResolvedMethod(ArtMethod* outer_method, |
| const InlineInfo& inline_info, |
| uint8_t inlining_depth) |
| SHARED_REQUIRES(Locks::mutator_lock_) { |
| uint32_t method_index = inline_info.GetMethodIndexAtDepth(inlining_depth); |
| InvokeType invoke_type = static_cast<InvokeType>( |
| inline_info.GetInvokeTypeAtDepth(inlining_depth)); |
| ArtMethod* caller = outer_method->GetDexCacheResolvedMethod(method_index, sizeof(void*)); |
| if (!caller->IsRuntimeMethod()) { |
| return caller; |
| } |
| |
| // The method in the dex cache can be the runtime method responsible for invoking |
| // the stub that will then update the dex cache. Therefore, we need to do the |
| // resolution ourselves. |
| |
| // We first find the class loader of our caller. If it is the outer method, we can directly |
| // use its class loader. Otherwise, we also need to resolve our caller. |
| StackHandleScope<2> hs(Thread::Current()); |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| MutableHandle<mirror::ClassLoader> class_loader(hs.NewHandle<mirror::Class>(nullptr)); |
| Handle<mirror::DexCache> dex_cache(hs.NewHandle(outer_method->GetDexCache())); |
| if (inlining_depth == 0) { |
| class_loader.Assign(outer_method->GetClassLoader()); |
| } else { |
| caller = GetResolvedMethod(outer_method, inline_info, inlining_depth - 1); |
| class_loader.Assign(caller->GetClassLoader()); |
| } |
| |
| return class_linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>( |
| *outer_method->GetDexFile(), method_index, dex_cache, class_loader, nullptr, invoke_type); |
| } |
| |
| inline ArtMethod* GetCalleeSaveMethodCaller(Thread* self, Runtime::CalleeSaveType type) |
| SHARED_REQUIRES(Locks::mutator_lock_) { |
| return GetCalleeSaveMethodCaller( |
| self->GetManagedStack()->GetTopQuickFrame(), type, true /* do_caller_check */); |
| } |
| |
| template <const bool kAccessCheck> |
| ALWAYS_INLINE |
| inline mirror::Class* CheckObjectAlloc(uint32_t type_idx, |
| ArtMethod* method, |
| Thread* self, bool* slow_path) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| size_t pointer_size = class_linker->GetImagePointerSize(); |
| mirror::Class* klass = method->GetDexCacheResolvedType<false>(type_idx, pointer_size); |
| if (UNLIKELY(klass == nullptr)) { |
| klass = class_linker->ResolveType(type_idx, method); |
| *slow_path = true; |
| if (klass == nullptr) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; // Failure |
| } else { |
| DCHECK(!self->IsExceptionPending()); |
| } |
| } |
| if (kAccessCheck) { |
| if (UNLIKELY(!klass->IsInstantiable())) { |
| self->ThrowNewException("Ljava/lang/InstantiationError;", PrettyDescriptor(klass).c_str()); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| mirror::Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer, klass); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| } |
| if (UNLIKELY(!klass->IsInitialized())) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_klass(hs.NewHandle(klass)); |
| // EnsureInitialized (the class initializer) might cause a GC. |
| // may cause us to suspend meaning that another thread may try to |
| // change the allocator while we are stuck in the entrypoints of |
| // an old allocator. Also, the class initialization may fail. To |
| // handle these cases we mark the slow path boolean as true so |
| // that the caller knows to check the allocator type to see if it |
| // has changed and to null-check the return value in case the |
| // initialization fails. |
| *slow_path = true; |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_klass, true, true)) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; // Failure |
| } else { |
| DCHECK(!self->IsExceptionPending()); |
| } |
| return h_klass.Get(); |
| } |
| return klass; |
| } |
| |
| ALWAYS_INLINE |
| inline mirror::Class* CheckClassInitializedForObjectAlloc(mirror::Class* klass, |
| Thread* self, |
| bool* slow_path) { |
| if (UNLIKELY(!klass->IsInitialized())) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(klass)); |
| // EnsureInitialized (the class initializer) might cause a GC. |
| // may cause us to suspend meaning that another thread may try to |
| // change the allocator while we are stuck in the entrypoints of |
| // an old allocator. Also, the class initialization may fail. To |
| // handle these cases we mark the slow path boolean as true so |
| // that the caller knows to check the allocator type to see if it |
| // has changed and to null-check the return value in case the |
| // initialization fails. |
| *slow_path = true; |
| if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(self, h_class, true, true)) { |
| DCHECK(self->IsExceptionPending()); |
| return nullptr; // Failure |
| } |
| return h_class.Get(); |
| } |
| return klass; |
| } |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to a Class. If it |
| // cannot be resolved, throw an error. If it can, use it to create an instance. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| template <bool kAccessCheck, bool kInstrumented> |
| ALWAYS_INLINE |
| inline mirror::Object* AllocObjectFromCode(uint32_t type_idx, |
| ArtMethod* method, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| bool slow_path = false; |
| mirror::Class* klass = CheckObjectAlloc<kAccessCheck>(type_idx, method, self, &slow_path); |
| if (UNLIKELY(slow_path)) { |
| if (klass == nullptr) { |
| return nullptr; |
| } |
| return klass->Alloc<kInstrumented>(self, Runtime::Current()->GetHeap()->GetCurrentAllocator()); |
| } |
| DCHECK(klass != nullptr); |
| return klass->Alloc<kInstrumented>(self, allocator_type); |
| } |
| |
| // Given the context of a calling Method and a resolved class, create an instance. |
| template <bool kInstrumented> |
| ALWAYS_INLINE |
| inline mirror::Object* AllocObjectFromCodeResolved(mirror::Class* klass, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| DCHECK(klass != nullptr); |
| bool slow_path = false; |
| klass = CheckClassInitializedForObjectAlloc(klass, self, &slow_path); |
| if (UNLIKELY(slow_path)) { |
| if (klass == nullptr) { |
| return nullptr; |
| } |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| // Pass in false since the object cannot be finalizable. |
| return klass->Alloc<kInstrumented, false>(self, heap->GetCurrentAllocator()); |
| } |
| // Pass in false since the object cannot be finalizable. |
| return klass->Alloc<kInstrumented, false>(self, allocator_type); |
| } |
| |
| // Given the context of a calling Method and an initialized class, create an instance. |
| template <bool kInstrumented> |
| ALWAYS_INLINE |
| inline mirror::Object* AllocObjectFromCodeInitialized(mirror::Class* klass, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| DCHECK(klass != nullptr); |
| // Pass in false since the object cannot be finalizable. |
| return klass->Alloc<kInstrumented, false>(self, allocator_type); |
| } |
| |
| |
| template <bool kAccessCheck> |
| ALWAYS_INLINE |
| inline mirror::Class* CheckArrayAlloc(uint32_t type_idx, |
| int32_t component_count, |
| ArtMethod* method, |
| bool* slow_path) { |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| size_t pointer_size = class_linker->GetImagePointerSize(); |
| mirror::Class* klass = method->GetDexCacheResolvedType<false>(type_idx, pointer_size); |
| if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve |
| klass = class_linker->ResolveType(type_idx, method); |
| *slow_path = true; |
| if (klass == nullptr) { // Error |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return nullptr; // Failure |
| } |
| CHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| } |
| if (kAccessCheck) { |
| mirror::Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer, klass); |
| *slow_path = true; |
| return nullptr; // Failure |
| } |
| } |
| return klass; |
| } |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If |
| // it cannot be resolved, throw an error. If it can, use it to create an array. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| template <bool kAccessCheck, bool kInstrumented> |
| ALWAYS_INLINE |
| inline mirror::Array* AllocArrayFromCode(uint32_t type_idx, |
| int32_t component_count, |
| ArtMethod* method, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| bool slow_path = false; |
| mirror::Class* klass = CheckArrayAlloc<kAccessCheck>(type_idx, component_count, method, |
| &slow_path); |
| if (UNLIKELY(slow_path)) { |
| if (klass == nullptr) { |
| return nullptr; |
| } |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| return mirror::Array::Alloc<kInstrumented>(self, klass, component_count, |
| klass->GetComponentSizeShift(), |
| heap->GetCurrentAllocator()); |
| } |
| return mirror::Array::Alloc<kInstrumented>(self, klass, component_count, |
| klass->GetComponentSizeShift(), allocator_type); |
| } |
| |
| template <bool kAccessCheck, bool kInstrumented> |
| ALWAYS_INLINE |
| inline mirror::Array* AllocArrayFromCodeResolved(mirror::Class* klass, |
| int32_t component_count, |
| ArtMethod* method, |
| Thread* self, |
| gc::AllocatorType allocator_type) { |
| DCHECK(klass != nullptr); |
| if (UNLIKELY(component_count < 0)) { |
| ThrowNegativeArraySizeException(component_count); |
| return nullptr; // Failure |
| } |
| if (kAccessCheck) { |
| mirror::Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referrer, klass); |
| return nullptr; // Failure |
| } |
| } |
| // No need to retry a slow-path allocation as the above code won't cause a GC or thread |
| // suspension. |
| return mirror::Array::Alloc<kInstrumented>(self, klass, component_count, |
| klass->GetComponentSizeShift(), allocator_type); |
| } |
| |
| template<FindFieldType type, bool access_check> |
| inline ArtField* FindFieldFromCode(uint32_t field_idx, |
| ArtMethod* referrer, |
| Thread* self, |
| size_t expected_size) REQUIRES(!Roles::uninterruptible_) { |
| bool is_primitive; |
| bool is_set; |
| bool is_static; |
| switch (type) { |
| case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break; |
| case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break; |
| case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break; |
| case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break; |
| case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break; |
| case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break; |
| case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break; |
| case StaticPrimitiveWrite: // Keep GCC happy by having a default handler, fall-through. |
| default: is_primitive = true; is_set = true; is_static = true; break; |
| } |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| |
| ArtField* resolved_field; |
| if (access_check) { |
| // Slow path: According to JLS 13.4.8, a linkage error may occur if a compile-time |
| // qualifying type of a field and the resolved run-time qualifying type of a field differed |
| // in their static-ness. |
| // |
| // In particular, don't assume the dex instruction already correctly knows if the |
| // real field is static or not. The resolution must not be aware of this. |
| ArtMethod* method = referrer->GetInterfaceMethodIfProxy(sizeof(void*)); |
| |
| StackHandleScope<2> hs(self); |
| Handle<mirror::DexCache> h_dex_cache(hs.NewHandle(method->GetDexCache())); |
| Handle<mirror::ClassLoader> h_class_loader(hs.NewHandle(method->GetClassLoader())); |
| |
| resolved_field = class_linker->ResolveFieldJLS(*method->GetDexFile(), |
| field_idx, |
| h_dex_cache, |
| h_class_loader); |
| } else { |
| // Fast path: Verifier already would've called ResolveFieldJLS and we wouldn't |
| // be executing here if there was a static/non-static mismatch. |
| resolved_field = class_linker->ResolveField(field_idx, referrer, is_static); |
| } |
| |
| if (UNLIKELY(resolved_field == nullptr)) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind. |
| return nullptr; // Failure. |
| } |
| mirror::Class* fields_class = resolved_field->GetDeclaringClass(); |
| if (access_check) { |
| if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| ThrowIncompatibleClassChangeErrorField(resolved_field, is_static, referrer); |
| return nullptr; |
| } |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CheckResolvedFieldAccess(fields_class, resolved_field, |
| field_idx))) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind. |
| return nullptr; // Failure. |
| } |
| if (UNLIKELY(is_set && resolved_field->IsFinal() && (fields_class != referring_class))) { |
| ThrowIllegalAccessErrorFinalField(referrer, resolved_field); |
| return nullptr; // Failure. |
| } else { |
| if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive || |
| resolved_field->FieldSize() != expected_size)) { |
| self->ThrowNewExceptionF("Ljava/lang/NoSuchFieldError;", |
| "Attempted read of %zd-bit %s on field '%s'", |
| expected_size * (32 / sizeof(int32_t)), |
| is_primitive ? "primitive" : "non-primitive", |
| PrettyField(resolved_field, true).c_str()); |
| return nullptr; // Failure. |
| } |
| } |
| } |
| if (!is_static) { |
| // instance fields must be being accessed on an initialized class |
| return resolved_field; |
| } else { |
| // If the class is initialized we're done. |
| if (LIKELY(fields_class->IsInitialized())) { |
| return resolved_field; |
| } else { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(fields_class)); |
| if (LIKELY(class_linker->EnsureInitialized(self, h_class, true, true))) { |
| // Otherwise let's ensure the class is initialized before resolving the field. |
| return resolved_field; |
| } |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind |
| return nullptr; // Failure. |
| } |
| } |
| } |
| |
| // Explicit template declarations of FindFieldFromCode for all field access types. |
| #define EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \ |
| template SHARED_REQUIRES(Locks::mutator_lock_) ALWAYS_INLINE \ |
| ArtField* FindFieldFromCode<_type, _access_check>(uint32_t field_idx, \ |
| ArtMethod* referrer, \ |
| Thread* self, size_t expected_size) \ |
| |
| #define EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \ |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, false); \ |
| EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, true) |
| |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectWrite); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveWrite); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectWrite); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveRead); |
| EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveWrite); |
| |
| #undef EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL |
| #undef EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL |
| |
| template<InvokeType type, bool access_check> |
| inline ArtMethod* FindMethodFromCode(uint32_t method_idx, mirror::Object** this_object, |
| ArtMethod* referrer, Thread* self) { |
| ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); |
| ArtMethod* resolved_method = class_linker->GetResolvedMethod(method_idx, referrer); |
| if (resolved_method == nullptr) { |
| StackHandleScope<1> hs(self); |
| mirror::Object* null_this = nullptr; |
| HandleWrapper<mirror::Object> h_this( |
| hs.NewHandleWrapper(type == kStatic ? &null_this : this_object)); |
| constexpr ClassLinker::ResolveMode resolve_mode = |
| access_check ? ClassLinker::kForceICCECheck |
| : ClassLinker::kNoICCECheckForCache; |
| resolved_method = class_linker->ResolveMethod<resolve_mode>(self, method_idx, referrer, type); |
| } |
| if (UNLIKELY(resolved_method == nullptr)) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind. |
| return nullptr; // Failure. |
| } else if (UNLIKELY(*this_object == nullptr && type != kStatic)) { |
| if (UNLIKELY(resolved_method->GetDeclaringClass()->IsStringClass() && |
| resolved_method->IsConstructor())) { |
| // Hack for String init: |
| // |
| // We assume that the input of String.<init> in verified code is always |
| // an unitialized reference. If it is a null constant, it must have been |
| // optimized out by the compiler. Do not throw NullPointerException. |
| } else { |
| // Maintain interpreter-like semantics where NullPointerException is thrown |
| // after potential NoSuchMethodError from class linker. |
| ThrowNullPointerExceptionForMethodAccess(method_idx, type); |
| return nullptr; // Failure. |
| } |
| } else if (access_check) { |
| mirror::Class* methods_class = resolved_method->GetDeclaringClass(); |
| bool can_access_resolved_method = |
| referrer->GetDeclaringClass()->CheckResolvedMethodAccess<type>(methods_class, |
| resolved_method, |
| method_idx); |
| if (UNLIKELY(!can_access_resolved_method)) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind. |
| return nullptr; // Failure. |
| } |
| // Incompatible class change should have been handled in resolve method. |
| if (UNLIKELY(resolved_method->CheckIncompatibleClassChange(type))) { |
| ThrowIncompatibleClassChangeError(type, resolved_method->GetInvokeType(), resolved_method, |
| referrer); |
| return nullptr; // Failure. |
| } |
| } |
| switch (type) { |
| case kStatic: |
| case kDirect: |
| return resolved_method; |
| case kVirtual: { |
| mirror::Class* klass = (*this_object)->GetClass(); |
| uint16_t vtable_index = resolved_method->GetMethodIndex(); |
| if (access_check && |
| (!klass->HasVTable() || |
| vtable_index >= static_cast<uint32_t>(klass->GetVTableLength()))) { |
| // Behavior to agree with that of the verifier. |
| ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), |
| resolved_method->GetName(), resolved_method->GetSignature()); |
| return nullptr; // Failure. |
| } |
| DCHECK(klass->HasVTable()) << PrettyClass(klass); |
| return klass->GetVTableEntry(vtable_index, class_linker->GetImagePointerSize()); |
| } |
| case kSuper: { |
| // TODO This lookup is quite slow. |
| // NB This is actually quite tricky to do any other way. We cannot use GetDeclaringClass since |
| // that will actually not be what we want in some cases where there are miranda methods or |
| // defaults. What we actually need is a GetContainingClass that says which classes virtuals |
| // this method is coming from. |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| uint16_t method_type_idx = referring_class->GetDexFile().GetMethodId(method_idx).class_idx_; |
| mirror::Class* method_reference_class = class_linker->ResolveType(method_type_idx, referrer); |
| if (UNLIKELY(method_reference_class == nullptr)) { |
| // Bad type idx. |
| CHECK(self->IsExceptionPending()); |
| return nullptr; |
| } else if (!method_reference_class->IsInterface()) { |
| // It is not an interface. |
| mirror::Class* super_class = referring_class->GetSuperClass(); |
| uint16_t vtable_index = resolved_method->GetMethodIndex(); |
| if (access_check) { |
| // Check existence of super class. |
| if (super_class == nullptr || !super_class->HasVTable() || |
| vtable_index >= static_cast<uint32_t>(super_class->GetVTableLength())) { |
| // Behavior to agree with that of the verifier. |
| ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), |
| resolved_method->GetName(), resolved_method->GetSignature()); |
| return nullptr; // Failure. |
| } |
| } |
| DCHECK(super_class != nullptr); |
| DCHECK(super_class->HasVTable()); |
| return super_class->GetVTableEntry(vtable_index, class_linker->GetImagePointerSize()); |
| } else { |
| // It is an interface. |
| if (access_check) { |
| if (!method_reference_class->IsAssignableFrom((*this_object)->GetClass())) { |
| ThrowIncompatibleClassChangeErrorClassForInterfaceSuper(resolved_method, |
| method_reference_class, |
| *this_object, |
| referrer); |
| return nullptr; // Failure. |
| } |
| } |
| // TODO We can do better than this for a (compiled) fastpath. |
| ArtMethod* result = method_reference_class->FindVirtualMethodForInterfaceSuper( |
| resolved_method, class_linker->GetImagePointerSize()); |
| // Throw an NSME if nullptr; |
| if (result == nullptr) { |
| ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), |
| resolved_method->GetName(), resolved_method->GetSignature()); |
| } |
| return result; |
| } |
| } |
| case kInterface: { |
| uint32_t imt_index = resolved_method->GetDexMethodIndex() % mirror::Class::kImtSize; |
| ArtMethod* imt_method = (*this_object)->GetClass()->GetEmbeddedImTableEntry( |
| imt_index, class_linker->GetImagePointerSize()); |
| if (!imt_method->IsImtConflictMethod() && !imt_method->IsImtUnimplementedMethod()) { |
| if (kIsDebugBuild) { |
| mirror::Class* klass = (*this_object)->GetClass(); |
| ArtMethod* method = klass->FindVirtualMethodForInterface( |
| resolved_method, class_linker->GetImagePointerSize()); |
| CHECK_EQ(imt_method, method) << PrettyMethod(resolved_method) << " / " << |
| PrettyMethod(imt_method) << " / " << PrettyMethod(method) << " / " << |
| PrettyClass(klass); |
| } |
| return imt_method; |
| } else { |
| ArtMethod* interface_method = (*this_object)->GetClass()->FindVirtualMethodForInterface( |
| resolved_method, class_linker->GetImagePointerSize()); |
| if (UNLIKELY(interface_method == nullptr)) { |
| ThrowIncompatibleClassChangeErrorClassForInterfaceDispatch(resolved_method, |
| *this_object, referrer); |
| return nullptr; // Failure. |
| } |
| return interface_method; |
| } |
| } |
| default: |
| LOG(FATAL) << "Unknown invoke type " << type; |
| return nullptr; // Failure. |
| } |
| } |
| |
| // Explicit template declarations of FindMethodFromCode for all invoke types. |
| #define EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \ |
| template SHARED_REQUIRES(Locks::mutator_lock_) ALWAYS_INLINE \ |
| ArtMethod* FindMethodFromCode<_type, _access_check>(uint32_t method_idx, \ |
| mirror::Object** this_object, \ |
| ArtMethod* referrer, \ |
| Thread* self) |
| #define EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \ |
| EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, false); \ |
| EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL(_type, true) |
| |
| EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kStatic); |
| EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kDirect); |
| EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kVirtual); |
| EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kSuper); |
| EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL(kInterface); |
| |
| #undef EXPLICIT_FIND_METHOD_FROM_CODE_TYPED_TEMPLATE_DECL |
| #undef EXPLICIT_FIND_METHOD_FROM_CODE_TEMPLATE_DECL |
| |
| // Fast path field resolution that can't initialize classes or throw exceptions. |
| inline ArtField* FindFieldFast(uint32_t field_idx, ArtMethod* referrer, FindFieldType type, |
| size_t expected_size) { |
| ArtField* resolved_field = |
| referrer->GetDeclaringClass()->GetDexCache()->GetResolvedField(field_idx, sizeof(void*)); |
| if (UNLIKELY(resolved_field == nullptr)) { |
| return nullptr; |
| } |
| // Check for incompatible class change. |
| bool is_primitive; |
| bool is_set; |
| bool is_static; |
| switch (type) { |
| case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break; |
| case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break; |
| case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break; |
| case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break; |
| case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break; |
| case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break; |
| case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break; |
| case StaticPrimitiveWrite: is_primitive = true; is_set = true; is_static = true; break; |
| default: |
| LOG(FATAL) << "UNREACHABLE"; |
| UNREACHABLE(); |
| } |
| if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| // Incompatible class change. |
| return nullptr; |
| } |
| mirror::Class* fields_class = resolved_field->GetDeclaringClass(); |
| if (is_static) { |
| // Check class is initialized else fail so that we can contend to initialize the class with |
| // other threads that may be racing to do this. |
| if (UNLIKELY(!fields_class->IsInitialized())) { |
| return nullptr; |
| } |
| } |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class) || |
| !referring_class->CanAccessMember(fields_class, resolved_field->GetAccessFlags()) || |
| (is_set && resolved_field->IsFinal() && (fields_class != referring_class)))) { |
| // Illegal access. |
| return nullptr; |
| } |
| if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive || |
| resolved_field->FieldSize() != expected_size)) { |
| return nullptr; |
| } |
| return resolved_field; |
| } |
| |
| // Fast path method resolution that can't throw exceptions. |
| inline ArtMethod* FindMethodFast(uint32_t method_idx, mirror::Object* this_object, |
| ArtMethod* referrer, bool access_check, InvokeType type) { |
| if (UNLIKELY(this_object == nullptr && type != kStatic)) { |
| return nullptr; |
| } |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| ArtMethod* resolved_method = |
| referring_class->GetDexCache()->GetResolvedMethod(method_idx, sizeof(void*)); |
| if (UNLIKELY(resolved_method == nullptr)) { |
| return nullptr; |
| } |
| if (access_check) { |
| // Check for incompatible class change errors and access. |
| bool icce = resolved_method->CheckIncompatibleClassChange(type); |
| if (UNLIKELY(icce)) { |
| return nullptr; |
| } |
| mirror::Class* methods_class = resolved_method->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(methods_class) || |
| !referring_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags()))) { |
| // Potential illegal access, may need to refine the method's class. |
| return nullptr; |
| } |
| } |
| if (type == kInterface) { // Most common form of slow path dispatch. |
| return this_object->GetClass()->FindVirtualMethodForInterface(resolved_method, sizeof(void*)); |
| } else if (type == kStatic || type == kDirect) { |
| return resolved_method; |
| } else if (type == kSuper) { |
| // TODO This lookup is rather slow. |
| uint16_t method_type_idx = referring_class->GetDexFile().GetMethodId(method_idx).class_idx_; |
| mirror::Class* method_reference_class = |
| referring_class->GetDexCache()->GetResolvedType(method_type_idx); |
| if (method_reference_class == nullptr) { |
| // Need to do full type resolution... |
| return nullptr; |
| } else if (!method_reference_class->IsInterface()) { |
| // It is not an interface. |
| mirror::Class* super_class = referrer->GetDeclaringClass()->GetSuperClass(); |
| if (resolved_method->GetMethodIndex() >= super_class->GetVTableLength()) { |
| // The super class does not have the method. |
| return nullptr; |
| } |
| return super_class->GetVTableEntry(resolved_method->GetMethodIndex(), sizeof(void*)); |
| } else { |
| return method_reference_class->FindVirtualMethodForInterfaceSuper( |
| resolved_method, sizeof(void*)); |
| } |
| } else { |
| DCHECK(type == kVirtual); |
| return this_object->GetClass()->GetVTableEntry( |
| resolved_method->GetMethodIndex(), sizeof(void*)); |
| } |
| } |
| |
| inline mirror::Class* ResolveVerifyAndClinit(uint32_t type_idx, ArtMethod* referrer, Thread* self, |
| bool can_run_clinit, bool verify_access) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| mirror::Class* klass = class_linker->ResolveType(type_idx, referrer); |
| if (UNLIKELY(klass == nullptr)) { |
| CHECK(self->IsExceptionPending()); |
| return nullptr; // Failure - Indicate to caller to deliver exception |
| } |
| // Perform access check if necessary. |
| mirror::Class* referring_class = referrer->GetDeclaringClass(); |
| if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) { |
| ThrowIllegalAccessErrorClass(referring_class, klass); |
| return nullptr; // Failure - Indicate to caller to deliver exception |
| } |
| // If we're just implementing const-class, we shouldn't call <clinit>. |
| if (!can_run_clinit) { |
| return klass; |
| } |
| // If we are the <clinit> of this class, just return our storage. |
| // |
| // Do not set the DexCache InitializedStaticStorage, since that implies <clinit> has finished |
| // running. |
| if (klass == referring_class && referrer->IsConstructor() && referrer->IsStatic()) { |
| return klass; |
| } |
| StackHandleScope<1> hs(self); |
| Handle<mirror::Class> h_class(hs.NewHandle(klass)); |
| if (!class_linker->EnsureInitialized(self, h_class, true, true)) { |
| CHECK(self->IsExceptionPending()); |
| return nullptr; // Failure - Indicate to caller to deliver exception |
| } |
| return h_class.Get(); |
| } |
| |
| inline mirror::String* ResolveStringFromCode(ArtMethod* referrer, uint32_t string_idx) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| return class_linker->ResolveString(string_idx, referrer); |
| } |
| |
| inline void UnlockJniSynchronizedMethod(jobject locked, Thread* self) { |
| // Save any pending exception over monitor exit call. |
| mirror::Throwable* saved_exception = nullptr; |
| if (UNLIKELY(self->IsExceptionPending())) { |
| saved_exception = self->GetException(); |
| self->ClearException(); |
| } |
| // Decode locked object and unlock, before popping local references. |
| self->DecodeJObject(locked)->MonitorExit(self); |
| if (UNLIKELY(self->IsExceptionPending())) { |
| LOG(FATAL) << "Synchronized JNI code returning with an exception:\n" |
| << saved_exception->Dump() |
| << "\nEncountered second exception during implicit MonitorExit:\n" |
| << self->GetException()->Dump(); |
| } |
| // Restore pending exception. |
| if (saved_exception != nullptr) { |
| self->SetException(saved_exception); |
| } |
| } |
| |
| template <typename INT_TYPE, typename FLOAT_TYPE> |
| inline INT_TYPE art_float_to_integral(FLOAT_TYPE f) { |
| const INT_TYPE kMaxInt = static_cast<INT_TYPE>(std::numeric_limits<INT_TYPE>::max()); |
| const INT_TYPE kMinInt = static_cast<INT_TYPE>(std::numeric_limits<INT_TYPE>::min()); |
| const FLOAT_TYPE kMaxIntAsFloat = static_cast<FLOAT_TYPE>(kMaxInt); |
| const FLOAT_TYPE kMinIntAsFloat = static_cast<FLOAT_TYPE>(kMinInt); |
| if (LIKELY(f > kMinIntAsFloat)) { |
| if (LIKELY(f < kMaxIntAsFloat)) { |
| return static_cast<INT_TYPE>(f); |
| } else { |
| return kMaxInt; |
| } |
| } else { |
| return (f != f) ? 0 : kMinInt; // f != f implies NaN |
| } |
| } |
| |
| } // namespace art |
| |
| #endif // ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_ |
