diff options
Diffstat (limited to 'runtime/entrypoints/entrypoint_utils-inl.h')
| -rw-r--r-- | runtime/entrypoints/entrypoint_utils-inl.h | 696 |
1 files changed, 696 insertions, 0 deletions
diff --git a/runtime/entrypoints/entrypoint_utils-inl.h b/runtime/entrypoints/entrypoint_utils-inl.h new file mode 100644 index 0000000000..482ad47d5d --- /dev/null +++ b/runtime/entrypoints/entrypoint_utils-inl.h @@ -0,0 +1,696 @@ +/* + * 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 "class_linker-inl.h" +#include "common_throws.h" +#include "dex_file.h" +#include "indirect_reference_table.h" +#include "invoke_type.h" +#include "jni_internal.h" +#include "mirror/art_method.h" +#include "mirror/array.h" +#include "mirror/class-inl.h" +#include "mirror/object-inl.h" +#include "mirror/throwable.h" +#include "object_utils.h" +#include "handle_scope-inl.h" +#include "thread.h" + +namespace art { + +// TODO: Fix no thread safety analysis when GCC can handle template specialization. +template <const bool kAccessCheck> +ALWAYS_INLINE static inline mirror::Class* CheckObjectAlloc(uint32_t type_idx, + mirror::ArtMethod* method, + Thread* self, bool* slow_path) + NO_THREAD_SAFETY_ANALYSIS { + mirror::Class* klass = method->GetDexCacheResolvedTypes()->GetWithoutChecks(type_idx); + if (UNLIKELY(klass == NULL)) { + klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method); + *slow_path = true; + if (klass == NULL) { + DCHECK(self->IsExceptionPending()); + return nullptr; // Failure + } + } + if (kAccessCheck) { + if (UNLIKELY(!klass->IsInstantiable())) { + ThrowLocation throw_location = self->GetCurrentLocationForThrow(); + self->ThrowNewException(throw_location, "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(h_klass, true, true)) { + DCHECK(self->IsExceptionPending()); + return nullptr; // Failure + } + return h_klass.Get(); + } + return klass; +} + +// TODO: Fix no thread safety analysis when annotalysis is smarter. +ALWAYS_INLINE static inline mirror::Class* CheckClassInitializedForObjectAlloc(mirror::Class* klass, + Thread* self, bool* slow_path) + NO_THREAD_SAFETY_ANALYSIS { + 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(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. +// TODO: Fix NO_THREAD_SAFETY_ANALYSIS when GCC is smarter. +template <bool kAccessCheck, bool kInstrumented> +ALWAYS_INLINE static inline mirror::Object* AllocObjectFromCode(uint32_t type_idx, + mirror::ArtMethod* method, + Thread* self, + gc::AllocatorType allocator_type) + NO_THREAD_SAFETY_ANALYSIS { + 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. +// TODO: Fix NO_THREAD_SAFETY_ANALYSIS when GCC is smarter. +template <bool kInstrumented> +ALWAYS_INLINE static inline mirror::Object* AllocObjectFromCodeResolved(mirror::Class* klass, + mirror::ArtMethod* method, + Thread* self, + gc::AllocatorType allocator_type) + NO_THREAD_SAFETY_ANALYSIS { + 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 can not be finalizable. + return klass->Alloc<kInstrumented, false>(self, heap->GetCurrentAllocator()); + } + // Pass in false since the object can not be finalizable. + return klass->Alloc<kInstrumented, false>(self, allocator_type); +} + +// Given the context of a calling Method and an initialized class, create an instance. +// TODO: Fix NO_THREAD_SAFETY_ANALYSIS when GCC is smarter. +template <bool kInstrumented> +ALWAYS_INLINE static inline mirror::Object* AllocObjectFromCodeInitialized(mirror::Class* klass, + mirror::ArtMethod* method, + Thread* self, + gc::AllocatorType allocator_type) + NO_THREAD_SAFETY_ANALYSIS { + DCHECK(klass != nullptr); + // Pass in false since the object can not be finalizable. + return klass->Alloc<kInstrumented, false>(self, allocator_type); +} + + +// TODO: Fix no thread safety analysis when GCC can handle template specialization. +template <bool kAccessCheck> +ALWAYS_INLINE static inline mirror::Class* CheckArrayAlloc(uint32_t type_idx, + mirror::ArtMethod* method, + int32_t component_count, + bool* slow_path) + NO_THREAD_SAFETY_ANALYSIS { + if (UNLIKELY(component_count < 0)) { + ThrowNegativeArraySizeException(component_count); + *slow_path = true; + return nullptr; // Failure + } + mirror::Class* klass = method->GetDexCacheResolvedTypes()->GetWithoutChecks(type_idx); + if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve + klass = Runtime::Current()->GetClassLinker()->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. +// TODO: Fix no thread safety analysis when GCC can handle template specialization. +template <bool kAccessCheck, bool kInstrumented> +ALWAYS_INLINE static inline mirror::Array* AllocArrayFromCode(uint32_t type_idx, + mirror::ArtMethod* method, + int32_t component_count, + Thread* self, + gc::AllocatorType allocator_type) + NO_THREAD_SAFETY_ANALYSIS { + bool slow_path = false; + mirror::Class* klass = CheckArrayAlloc<kAccessCheck>(type_idx, method, component_count, + &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->GetComponentSize(), + heap->GetCurrentAllocator()); + } + return mirror::Array::Alloc<kInstrumented>(self, klass, component_count, + klass->GetComponentSize(), allocator_type); +} + +template <bool kAccessCheck, bool kInstrumented> +ALWAYS_INLINE static inline mirror::Array* AllocArrayFromCodeResolved(mirror::Class* klass, + mirror::ArtMethod* method, + int32_t component_count, + Thread* self, + gc::AllocatorType allocator_type) + NO_THREAD_SAFETY_ANALYSIS { + 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->GetComponentSize(), allocator_type); +} + +template<FindFieldType type, bool access_check> +static inline mirror::ArtField* FindFieldFromCode(uint32_t field_idx, mirror::ArtMethod* referrer, + Thread* self, size_t expected_size) { + 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(); + mirror::ArtField* 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)) { + ThrowLocation throw_location = self->GetCurrentLocationForThrow(); + DCHECK(throw_location.GetMethod() == referrer); + self->ThrowNewExceptionF(throw_location, "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(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_LOCKS_REQUIRED(Locks::mutator_lock_) ALWAYS_INLINE \ +mirror::ArtField* FindFieldFromCode<_type, _access_check>(uint32_t field_idx, \ + mirror::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> +static inline mirror::ArtMethod* FindMethodFromCode(uint32_t method_idx, + mirror::Object** this_object, + mirror::ArtMethod** referrer, Thread* self) { + ClassLinker* const class_linker = Runtime::Current()->GetClassLinker(); + mirror::ArtMethod* resolved_method = class_linker->GetResolvedMethod(method_idx, *referrer, type); + 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)); + resolved_method = class_linker->ResolveMethod(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)) { + // Maintain interpreter-like semantics where NullPointerException is thrown + // after potential NoSuchMethodError from class linker. + ThrowLocation throw_location = self->GetCurrentLocationForThrow(); + DCHECK_EQ(*referrer, throw_location.GetMethod()); + ThrowNullPointerExceptionForMethodAccess(throw_location, method_idx, type); + return nullptr; // Failure. + } else if (access_check) { + // 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. + } + mirror::Class* methods_class = resolved_method->GetDeclaringClass(); + mirror::Class* referring_class = (*referrer)->GetDeclaringClass(); + bool can_access_resolved_method = + referring_class->CheckResolvedMethodAccess<type>(methods_class, resolved_method, + method_idx); + if (UNLIKELY(!can_access_resolved_method)) { + DCHECK(self->IsExceptionPending()); // Throw exception and unwind. + return nullptr; // Failure. + } + } + switch (type) { + case kStatic: + case kDirect: + return resolved_method; + case kVirtual: { + mirror::ObjectArray<mirror::ArtMethod>* vtable = (*this_object)->GetClass()->GetVTable(); + uint16_t vtable_index = resolved_method->GetMethodIndex(); + if (access_check && + (vtable == nullptr || vtable_index >= static_cast<uint32_t>(vtable->GetLength()))) { + // Behavior to agree with that of the verifier. + ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), + resolved_method->GetName(), resolved_method->GetSignature()); + return nullptr; // Failure. + } + DCHECK(vtable != nullptr); + return vtable->GetWithoutChecks(vtable_index); + } + case kSuper: { + mirror::Class* super_class = (*referrer)->GetDeclaringClass()->GetSuperClass(); + uint16_t vtable_index = resolved_method->GetMethodIndex(); + mirror::ObjectArray<mirror::ArtMethod>* vtable; + if (access_check) { + // Check existence of super class. + vtable = (super_class != nullptr) ? super_class->GetVTable() : nullptr; + if (vtable == nullptr || vtable_index >= static_cast<uint32_t>(vtable->GetLength())) { + // Behavior to agree with that of the verifier. + ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), + resolved_method->GetName(), resolved_method->GetSignature()); + return nullptr; // Failure. + } + } else { + // Super class must exist. + DCHECK(super_class != nullptr); + vtable = super_class->GetVTable(); + } + DCHECK(vtable != nullptr); + return vtable->GetWithoutChecks(vtable_index); + } + case kInterface: { + uint32_t imt_index = resolved_method->GetDexMethodIndex() % mirror::Class::kImtSize; + mirror::ArtMethod* imt_method = (*this_object)->GetClass()->GetEmbeddedImTableEntry(imt_index); + if (!imt_method->IsImtConflictMethod()) { + return imt_method; + } else { + mirror::ArtMethod* interface_method = + (*this_object)->GetClass()->FindVirtualMethodForInterface(resolved_method); + 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_LOCKS_REQUIRED(Locks::mutator_lock_) ALWAYS_INLINE \ + mirror::ArtMethod* FindMethodFromCode<_type, _access_check>(uint32_t method_idx, \ + mirror::Object** this_object, \ + mirror::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. +static inline mirror::ArtField* FindFieldFast(uint32_t field_idx, + mirror::ArtMethod* referrer, + FindFieldType type, size_t expected_size) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::ArtField* resolved_field = + referrer->GetDeclaringClass()->GetDexCache()->GetResolvedField(field_idx); + 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"; // Assignment below to avoid GCC warnings. + is_primitive = true; + is_set = true; + is_static = true; + break; + } + 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. +static inline mirror::ArtMethod* FindMethodFast(uint32_t method_idx, + mirror::Object* this_object, + mirror::ArtMethod* referrer, + bool access_check, InvokeType type) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + bool is_direct = type == kStatic || type == kDirect; + if (UNLIKELY(this_object == NULL && !is_direct)) { + return NULL; + } + mirror::ArtMethod* resolved_method = + referrer->GetDeclaringClass()->GetDexCache()->GetResolvedMethod(method_idx); + if (UNLIKELY(resolved_method == NULL)) { + return NULL; + } + if (access_check) { + // Check for incompatible class change errors and access. + bool icce = resolved_method->CheckIncompatibleClassChange(type); + if (UNLIKELY(icce)) { + return NULL; + } + mirror::Class* methods_class = resolved_method->GetDeclaringClass(); + mirror::Class* referring_class = referrer->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 NULL; + } + } + if (type == kInterface) { // Most common form of slow path dispatch. + return this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); + } else if (is_direct) { + return resolved_method; + } else if (type == kSuper) { + return referrer->GetDeclaringClass()->GetSuperClass()->GetVTable()-> + Get(resolved_method->GetMethodIndex()); + } else { + DCHECK(type == kVirtual); + return this_object->GetClass()->GetVTable()->Get(resolved_method->GetMethodIndex()); + } +} + +static inline mirror::Class* ResolveVerifyAndClinit(uint32_t type_idx, + mirror::ArtMethod* referrer, + Thread* self, bool can_run_clinit, + bool verify_access) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + 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(h_class, true, true)) { + CHECK(self->IsExceptionPending()); + return nullptr; // Failure - Indicate to caller to deliver exception + } + return h_class.Get(); +} + +static inline mirror::String* ResolveStringFromCode(mirror::ArtMethod* referrer, + uint32_t string_idx) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); + return class_linker->ResolveString(string_idx, referrer); +} + +static inline void UnlockJniSynchronizedMethod(jobject locked, Thread* self) + NO_THREAD_SAFETY_ANALYSIS /* SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) */ { + // Save any pending exception over monitor exit call. + mirror::Throwable* saved_exception = NULL; + ThrowLocation saved_throw_location; + bool is_exception_reported = self->IsExceptionReportedToInstrumentation(); + if (UNLIKELY(self->IsExceptionPending())) { + saved_exception = self->GetException(&saved_throw_location); + 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(NULL)->Dump(); + } + // Restore pending exception. + if (saved_exception != NULL) { + self->SetException(saved_throw_location, saved_exception); + self->SetExceptionReportedToInstrumentation(is_exception_reported); + } +} + +static inline void CheckReferenceResult(mirror::Object* o, Thread* self) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (o == NULL) { + return; + } + mirror::ArtMethod* m = self->GetCurrentMethod(NULL); + if (o == kInvalidIndirectRefObject) { + JniAbortF(NULL, "invalid reference returned from %s", PrettyMethod(m).c_str()); + } + // Make sure that the result is an instance of the type this method was expected to return. + StackHandleScope<1> hs(self); + Handle<mirror::ArtMethod> h_m(hs.NewHandle(m)); + mirror::Class* return_type = MethodHelper(h_m).GetReturnType(); + + if (!o->InstanceOf(return_type)) { + JniAbortF(NULL, "attempt to return an instance of %s from %s", PrettyTypeOf(o).c_str(), + PrettyMethod(h_m.Get()).c_str()); + } +} + +static inline void CheckSuspend(Thread* thread) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + for (;;) { + if (thread->ReadFlag(kCheckpointRequest)) { + thread->RunCheckpointFunction(); + } else if (thread->ReadFlag(kSuspendRequest)) { + thread->FullSuspendCheck(); + } else { + break; + } + } +} + +template <typename INT_TYPE, typename FLOAT_TYPE> +static 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_ |