673 lines
30 KiB
C++
673 lines
30 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
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#define ART_RUNTIME_ENTRYPOINTS_ENTRYPOINT_UTILS_INL_H_
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#include "entrypoint_utils.h"
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#include "class_linker-inl.h"
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#include "common_throws.h"
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#include "dex_file.h"
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#include "indirect_reference_table.h"
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#include "invoke_type.h"
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#include "jni_internal.h"
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#include "mirror/art_method.h"
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#include "mirror/array.h"
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#include "mirror/class-inl.h"
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#include "mirror/object-inl.h"
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#include "mirror/throwable.h"
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#include "handle_scope-inl.h"
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#include "thread.h"
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namespace art {
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// TODO: Fix no thread safety analysis when GCC can handle template specialization.
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template <const bool kAccessCheck>
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static inline mirror::Class* CheckObjectAlloc(uint32_t type_idx,
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mirror::ArtMethod* method,
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Thread* self, bool* slow_path) {
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mirror::Class* klass = method->GetDexCacheResolvedType<false>(type_idx);
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if (UNLIKELY(klass == NULL)) {
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klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method);
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*slow_path = true;
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if (klass == NULL) {
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DCHECK(self->IsExceptionPending());
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return nullptr; // Failure
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} else {
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DCHECK(!self->IsExceptionPending());
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}
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}
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if (kAccessCheck) {
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if (UNLIKELY(!klass->IsInstantiable())) {
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ThrowLocation throw_location = self->GetCurrentLocationForThrow();
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self->ThrowNewException(throw_location, "Ljava/lang/InstantiationError;",
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PrettyDescriptor(klass).c_str());
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*slow_path = true;
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return nullptr; // Failure
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}
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mirror::Class* referrer = method->GetDeclaringClass();
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if (UNLIKELY(!referrer->CanAccess(klass))) {
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ThrowIllegalAccessErrorClass(referrer, klass);
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*slow_path = true;
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return nullptr; // Failure
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}
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}
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if (UNLIKELY(!klass->IsInitialized())) {
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_klass(hs.NewHandle(klass));
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// EnsureInitialized (the class initializer) might cause a GC.
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// may cause us to suspend meaning that another thread may try to
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// change the allocator while we are stuck in the entrypoints of
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// an old allocator. Also, the class initialization may fail. To
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// handle these cases we mark the slow path boolean as true so
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// that the caller knows to check the allocator type to see if it
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// has changed and to null-check the return value in case the
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// initialization fails.
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*slow_path = true;
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if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(h_klass, true, true)) {
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DCHECK(self->IsExceptionPending());
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return nullptr; // Failure
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} else {
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DCHECK(!self->IsExceptionPending());
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}
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return h_klass.Get();
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}
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return klass;
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}
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// TODO: Fix no thread safety analysis when annotalysis is smarter.
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static inline mirror::Class* CheckClassInitializedForObjectAlloc(mirror::Class* klass,
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Thread* self,
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bool* slow_path) {
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if (UNLIKELY(!klass->IsInitialized())) {
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_class(hs.NewHandle(klass));
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// EnsureInitialized (the class initializer) might cause a GC.
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// may cause us to suspend meaning that another thread may try to
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// change the allocator while we are stuck in the entrypoints of
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// an old allocator. Also, the class initialization may fail. To
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// handle these cases we mark the slow path boolean as true so
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// that the caller knows to check the allocator type to see if it
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// has changed and to null-check the return value in case the
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// initialization fails.
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*slow_path = true;
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if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(h_class, true, true)) {
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DCHECK(self->IsExceptionPending());
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return nullptr; // Failure
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}
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return h_class.Get();
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}
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return klass;
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}
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// Given the context of a calling Method, use its DexCache to resolve a type to a Class. If it
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// cannot be resolved, throw an error. If it can, use it to create an instance.
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// When verification/compiler hasn't been able to verify access, optionally perform an access
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// check.
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// TODO: Fix NO_THREAD_SAFETY_ANALYSIS when GCC is smarter.
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template <bool kAccessCheck, bool kInstrumented>
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static inline mirror::Object* AllocObjectFromCode(uint32_t type_idx,
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mirror::ArtMethod* method,
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Thread* self,
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gc::AllocatorType allocator_type) {
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bool slow_path = false;
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mirror::Class* klass = CheckObjectAlloc<kAccessCheck>(type_idx, method, self, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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return klass->Alloc<kInstrumented>(self, Runtime::Current()->GetHeap()->GetCurrentAllocator());
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}
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DCHECK(klass != nullptr);
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return klass->Alloc<kInstrumented>(self, allocator_type);
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}
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// Given the context of a calling Method and a resolved class, create an instance.
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// TODO: Fix NO_THREAD_SAFETY_ANALYSIS when GCC is smarter.
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template <bool kInstrumented>
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static inline mirror::Object* AllocObjectFromCodeResolved(mirror::Class* klass,
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mirror::ArtMethod* method,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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bool slow_path = false;
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klass = CheckClassInitializedForObjectAlloc(klass, self, &slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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gc::Heap* heap = Runtime::Current()->GetHeap();
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// Pass in false since the object can not be finalizable.
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return klass->Alloc<kInstrumented, false>(self, heap->GetCurrentAllocator());
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}
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// Pass in false since the object can not be finalizable.
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return klass->Alloc<kInstrumented, false>(self, allocator_type);
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}
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// Given the context of a calling Method and an initialized class, create an instance.
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// TODO: Fix NO_THREAD_SAFETY_ANALYSIS when GCC is smarter.
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template <bool kInstrumented>
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static inline mirror::Object* AllocObjectFromCodeInitialized(mirror::Class* klass,
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mirror::ArtMethod* method,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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// Pass in false since the object can not be finalizable.
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return klass->Alloc<kInstrumented, false>(self, allocator_type);
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}
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// TODO: Fix no thread safety analysis when GCC can handle template specialization.
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template <bool kAccessCheck>
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static inline mirror::Class* CheckArrayAlloc(uint32_t type_idx,
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mirror::ArtMethod* method,
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int32_t component_count,
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bool* slow_path) {
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if (UNLIKELY(component_count < 0)) {
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ThrowNegativeArraySizeException(component_count);
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*slow_path = true;
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return nullptr; // Failure
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}
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mirror::Class* klass = method->GetDexCacheResolvedType<false>(type_idx);
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if (UNLIKELY(klass == nullptr)) { // Not in dex cache so try to resolve
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klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method);
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*slow_path = true;
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if (klass == nullptr) { // Error
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DCHECK(Thread::Current()->IsExceptionPending());
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return nullptr; // Failure
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}
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CHECK(klass->IsArrayClass()) << PrettyClass(klass);
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}
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if (kAccessCheck) {
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mirror::Class* referrer = method->GetDeclaringClass();
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if (UNLIKELY(!referrer->CanAccess(klass))) {
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ThrowIllegalAccessErrorClass(referrer, klass);
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*slow_path = true;
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return nullptr; // Failure
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}
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}
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return klass;
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}
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// Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If
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// it cannot be resolved, throw an error. If it can, use it to create an array.
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// When verification/compiler hasn't been able to verify access, optionally perform an access
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// check.
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// TODO: Fix no thread safety analysis when GCC can handle template specialization.
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template <bool kAccessCheck, bool kInstrumented>
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static inline mirror::Array* AllocArrayFromCode(uint32_t type_idx,
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mirror::ArtMethod* method,
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int32_t component_count,
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Thread* self,
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gc::AllocatorType allocator_type) {
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bool slow_path = false;
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mirror::Class* klass = CheckArrayAlloc<kAccessCheck>(type_idx, method, component_count,
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&slow_path);
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if (UNLIKELY(slow_path)) {
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if (klass == nullptr) {
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return nullptr;
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}
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gc::Heap* heap = Runtime::Current()->GetHeap();
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return mirror::Array::Alloc<kInstrumented>(self, klass, component_count,
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klass->GetComponentSize(),
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heap->GetCurrentAllocator());
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}
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return mirror::Array::Alloc<kInstrumented>(self, klass, component_count,
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klass->GetComponentSize(), allocator_type);
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}
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template <bool kAccessCheck, bool kInstrumented>
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static inline mirror::Array* AllocArrayFromCodeResolved(mirror::Class* klass,
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mirror::ArtMethod* method,
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int32_t component_count,
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Thread* self,
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gc::AllocatorType allocator_type) {
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DCHECK(klass != nullptr);
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if (UNLIKELY(component_count < 0)) {
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ThrowNegativeArraySizeException(component_count);
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return nullptr; // Failure
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}
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if (kAccessCheck) {
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mirror::Class* referrer = method->GetDeclaringClass();
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if (UNLIKELY(!referrer->CanAccess(klass))) {
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ThrowIllegalAccessErrorClass(referrer, klass);
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return nullptr; // Failure
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}
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}
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// No need to retry a slow-path allocation as the above code won't cause a GC or thread
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// suspension.
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return mirror::Array::Alloc<kInstrumented>(self, klass, component_count,
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klass->GetComponentSize(), allocator_type);
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}
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template<FindFieldType type, bool access_check>
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static inline mirror::ArtField* FindFieldFromCode(uint32_t field_idx, mirror::ArtMethod* referrer,
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Thread* self, size_t expected_size) {
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bool is_primitive;
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bool is_set;
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bool is_static;
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switch (type) {
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case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break;
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case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break;
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case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break;
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case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break;
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case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break;
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case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break;
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case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break;
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case StaticPrimitiveWrite: // Keep GCC happy by having a default handler, fall-through.
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default: is_primitive = true; is_set = true; is_static = true; break;
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}
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ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
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mirror::ArtField* resolved_field = class_linker->ResolveField(field_idx, referrer, is_static);
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if (UNLIKELY(resolved_field == nullptr)) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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mirror::Class* fields_class = resolved_field->GetDeclaringClass();
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if (access_check) {
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if (UNLIKELY(resolved_field->IsStatic() != is_static)) {
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ThrowIncompatibleClassChangeErrorField(resolved_field, is_static, referrer);
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return nullptr;
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}
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mirror::Class* referring_class = referrer->GetDeclaringClass();
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if (UNLIKELY(!referring_class->CheckResolvedFieldAccess(fields_class, resolved_field,
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field_idx))) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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if (UNLIKELY(is_set && resolved_field->IsFinal() && (fields_class != referring_class))) {
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ThrowIllegalAccessErrorFinalField(referrer, resolved_field);
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return nullptr; // Failure.
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} else {
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if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive ||
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resolved_field->FieldSize() != expected_size)) {
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ThrowLocation throw_location = self->GetCurrentLocationForThrow();
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DCHECK(throw_location.GetMethod() == referrer);
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self->ThrowNewExceptionF(throw_location, "Ljava/lang/NoSuchFieldError;",
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"Attempted read of %zd-bit %s on field '%s'",
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expected_size * (32 / sizeof(int32_t)),
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is_primitive ? "primitive" : "non-primitive",
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PrettyField(resolved_field, true).c_str());
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return nullptr; // Failure.
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}
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}
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}
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if (!is_static) {
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// instance fields must be being accessed on an initialized class
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return resolved_field;
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} else {
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// If the class is initialized we're done.
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if (LIKELY(fields_class->IsInitialized())) {
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return resolved_field;
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} else {
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StackHandleScope<1> hs(self);
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Handle<mirror::Class> h_class(hs.NewHandle(fields_class));
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if (LIKELY(class_linker->EnsureInitialized(h_class, true, true))) {
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// Otherwise let's ensure the class is initialized before resolving the field.
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return resolved_field;
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}
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind
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return nullptr; // Failure.
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}
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}
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}
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// Explicit template declarations of FindFieldFromCode for all field access types.
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#define EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, _access_check) \
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template SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) ALWAYS_INLINE \
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mirror::ArtField* FindFieldFromCode<_type, _access_check>(uint32_t field_idx, \
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mirror::ArtMethod* referrer, \
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Thread* self, size_t expected_size) \
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#define EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(_type) \
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EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, false); \
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EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL(_type, true)
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstanceObjectWrite);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(InstancePrimitiveWrite);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticObjectWrite);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveRead);
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EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL(StaticPrimitiveWrite);
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#undef EXPLICIT_FIND_FIELD_FROM_CODE_TYPED_TEMPLATE_DECL
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#undef EXPLICIT_FIND_FIELD_FROM_CODE_TEMPLATE_DECL
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template<InvokeType type, bool access_check>
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static inline mirror::ArtMethod* FindMethodFromCode(uint32_t method_idx,
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mirror::Object** this_object,
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mirror::ArtMethod** referrer, Thread* self) {
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ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
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mirror::ArtMethod* resolved_method = class_linker->GetResolvedMethod(method_idx, *referrer, type);
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if (resolved_method == nullptr) {
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StackHandleScope<1> hs(self);
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mirror::Object* null_this = nullptr;
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HandleWrapper<mirror::Object> h_this(
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hs.NewHandleWrapper(type == kStatic ? &null_this : this_object));
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resolved_method = class_linker->ResolveMethod(self, method_idx, referrer, type);
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}
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if (UNLIKELY(resolved_method == nullptr)) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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} else if (UNLIKELY(*this_object == nullptr && type != kStatic)) {
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// Maintain interpreter-like semantics where NullPointerException is thrown
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// after potential NoSuchMethodError from class linker.
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ThrowLocation throw_location = self->GetCurrentLocationForThrow();
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DCHECK_EQ(*referrer, throw_location.GetMethod());
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ThrowNullPointerExceptionForMethodAccess(throw_location, method_idx, type);
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return nullptr; // Failure.
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} else if (access_check) {
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// Incompatible class change should have been handled in resolve method.
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if (UNLIKELY(resolved_method->CheckIncompatibleClassChange(type))) {
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ThrowIncompatibleClassChangeError(type, resolved_method->GetInvokeType(), resolved_method,
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*referrer);
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return nullptr; // Failure.
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}
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mirror::Class* methods_class = resolved_method->GetDeclaringClass();
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mirror::Class* referring_class = (*referrer)->GetDeclaringClass();
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bool can_access_resolved_method =
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referring_class->CheckResolvedMethodAccess<type>(methods_class, resolved_method,
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method_idx);
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if (UNLIKELY(!can_access_resolved_method)) {
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DCHECK(self->IsExceptionPending()); // Throw exception and unwind.
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return nullptr; // Failure.
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}
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}
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switch (type) {
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case kStatic:
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case kDirect:
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return resolved_method;
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case kVirtual: {
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mirror::Class* klass = (*this_object)->GetClass();
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uint16_t vtable_index = resolved_method->GetMethodIndex();
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if (access_check &&
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(!klass->HasVTable() ||
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vtable_index >= static_cast<uint32_t>(klass->GetVTableLength()))) {
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// Behavior to agree with that of the verifier.
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ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(),
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resolved_method->GetName(), resolved_method->GetSignature());
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return nullptr; // Failure.
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}
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DCHECK(klass->HasVTable()) << PrettyClass(klass);
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return klass->GetVTableEntry(vtable_index);
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}
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case kSuper: {
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mirror::Class* super_class = (*referrer)->GetDeclaringClass()->GetSuperClass();
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uint16_t vtable_index = resolved_method->GetMethodIndex();
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if (access_check) {
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// Check existence of super class.
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if (super_class == nullptr || !super_class->HasVTable() ||
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vtable_index >= static_cast<uint32_t>(super_class->GetVTableLength())) {
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// Behavior to agree with that of the verifier.
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ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(),
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resolved_method->GetName(), resolved_method->GetSignature());
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return nullptr; // Failure.
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}
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} else {
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// Super class must exist.
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DCHECK(super_class != nullptr);
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}
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DCHECK(super_class->HasVTable());
|
|
return super_class->GetVTableEntry(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() && !imt_method->IsImtUnimplementedMethod()) {
|
|
if (kIsDebugBuild) {
|
|
mirror::Class* klass = (*this_object)->GetClass();
|
|
mirror::ArtMethod* method = klass->FindVirtualMethodForInterface(resolved_method);
|
|
CHECK_EQ(imt_method, method) << PrettyMethod(resolved_method) << " / " <<
|
|
PrettyMethod(imt_method) << " / " << PrettyMethod(method) << " / " <<
|
|
PrettyClass(klass);
|
|
}
|
|
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) {
|
|
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) {
|
|
if (UNLIKELY(this_object == NULL && type != kStatic)) {
|
|
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 (type == kStatic || type == kDirect) {
|
|
return resolved_method;
|
|
} else if (type == kSuper) {
|
|
return referrer->GetDeclaringClass()->GetSuperClass()
|
|
->GetVTableEntry(resolved_method->GetMethodIndex());
|
|
} else {
|
|
DCHECK(type == kVirtual);
|
|
return this_object->GetClass()->GetVTableEntry(resolved_method->GetMethodIndex());
|
|
}
|
|
}
|
|
|
|
static inline mirror::Class* ResolveVerifyAndClinit(uint32_t type_idx,
|
|
mirror::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(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) {
|
|
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
|
|
return class_linker->ResolveString(string_idx, referrer);
|
|
}
|
|
|
|
static inline void UnlockJniSynchronizedMethod(jobject locked, Thread* self) {
|
|
// 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 CheckSuspend(Thread* thread) {
|
|
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_
|