466 lines
24 KiB
C++
466 lines
24 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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#include <stdint.h>
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#include "art_field-inl.h"
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#include "art_method-inl.h"
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#include "base/callee_save_type.h"
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#include "callee_save_frame.h"
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#include "dex/dex_file-inl.h"
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#include "entrypoints/entrypoint_utils-inl.h"
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#include "gc_root-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/object_reference.h"
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namespace art {
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// Fast path field resolution that can't initialize classes or throw exceptions.
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inline ArtField* FindFieldFast(uint32_t field_idx,
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ArtMethod* referrer,
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FindFieldType type,
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size_t expected_size)
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REQUIRES(!Roles::uninterruptible_)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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ScopedAssertNoThreadSuspension ants(__FUNCTION__);
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ArtField* resolved_field = referrer->GetDexCache()->GetResolvedField(field_idx);
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if (UNLIKELY(resolved_field == nullptr)) {
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return nullptr;
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}
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// Check for incompatible class change.
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const bool is_primitive = (type & FindFieldFlags::PrimitiveBit) != 0;
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const bool is_set = (type & FindFieldFlags::WriteBit) != 0;
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const bool is_static = (type & FindFieldFlags::StaticBit) != 0;
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if (UNLIKELY(resolved_field->IsStatic() != is_static)) {
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// Incompatible class change.
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return nullptr;
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}
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ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass();
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if (is_static) {
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// Check class is initialized else fail so that we can contend to initialize the class with
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// other threads that may be racing to do this.
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if (UNLIKELY(!fields_class->IsVisiblyInitialized())) {
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return nullptr;
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}
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}
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ObjPtr<mirror::Class> referring_class = referrer->GetDeclaringClass();
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if (UNLIKELY(!referring_class->CanAccess(fields_class) ||
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!referring_class->CanAccessMember(fields_class, resolved_field->GetAccessFlags()) ||
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(is_set && !resolved_field->CanBeChangedBy(referrer)))) {
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// Illegal access.
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return nullptr;
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}
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if (UNLIKELY(resolved_field->IsPrimitiveType() != is_primitive ||
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resolved_field->FieldSize() != expected_size)) {
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return nullptr;
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}
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return resolved_field;
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}
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// Helper function to do a null check after trying to resolve the field. Not for statics since obj
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// does not exist there. There is a suspend check, object is a double pointer to update the value
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// in the caller in case it moves.
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template<FindFieldType type, bool kAccessCheck>
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ALWAYS_INLINE static inline ArtField* FindInstanceField(uint32_t field_idx,
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ArtMethod* referrer,
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Thread* self,
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size_t size,
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mirror::Object** obj)
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REQUIRES(!Roles::uninterruptible_)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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StackHandleScope<1> hs(self);
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HandleWrapper<mirror::Object> h(hs.NewHandleWrapper(obj));
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ArtField* field = FindFieldFromCode<type, kAccessCheck>(field_idx, referrer, self, size);
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if (LIKELY(field != nullptr) && UNLIKELY(h == nullptr)) {
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ThrowNullPointerExceptionForFieldAccess(field, referrer, (type & FindFieldFlags::ReadBit) != 0);
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return nullptr;
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}
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return field;
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}
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static ArtMethod* GetReferrer(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_) {
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if (kIsDebugBuild) {
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// stub_test doesn't call this code with a proper frame, so get the outer, and if
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// it does not have compiled code return it.
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ArtMethod* outer = GetCalleeSaveOuterMethod(self, CalleeSaveType::kSaveRefsOnly);
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if (outer->GetEntryPointFromQuickCompiledCode() == nullptr) {
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return outer;
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}
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}
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return GetCalleeSaveMethodCallerAndOuterMethod(self, CalleeSaveType::kSaveRefsOnly).caller;
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}
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// Macro used to define this set of functions:
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//
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// art{Get,Set}<Kind>{Static,Instance}FromCode
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// art{Get,Set}<Kind>{Static,Instance}FromCompiledCode
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//
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#define ART_GET_FIELD_FROM_CODE(Kind, PrimitiveType, RetType, SetType, \
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PrimitiveOrObject, IsObject, Ptr) \
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extern "C" RetType artGet ## Kind ## StaticFromCode(uint32_t field_idx, \
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ArtMethod* referrer, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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ScopedQuickEntrypointChecks sqec(self); \
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ArtField* field = FindFieldFast( \
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field_idx, referrer, Static ## PrimitiveOrObject ## Read, \
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sizeof(PrimitiveType)); \
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if (LIKELY(field != nullptr)) { \
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return field->Get ## Kind (field->GetDeclaringClass())Ptr; /* NOLINT */ \
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} \
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field = FindFieldFromCode<Static ## PrimitiveOrObject ## Read, true>( \
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field_idx, referrer, self, sizeof(PrimitiveType)); \
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if (LIKELY(field != nullptr)) { \
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return field->Get ## Kind (field->GetDeclaringClass())Ptr; /* NOLINT */ \
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} \
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/* Will throw exception by checking with Thread::Current. */ \
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return 0; \
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} \
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\
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extern "C" RetType artGet ## Kind ## InstanceFromCode(uint32_t field_idx, \
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mirror::Object* obj, \
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ArtMethod* referrer, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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ScopedQuickEntrypointChecks sqec(self); \
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ArtField* field = FindFieldFast( \
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field_idx, referrer, Instance ## PrimitiveOrObject ## Read, \
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sizeof(PrimitiveType)); \
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if (LIKELY(field != nullptr) && obj != nullptr) { \
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return field->Get ## Kind (obj)Ptr; /* NOLINT */ \
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} \
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field = FindInstanceField<Instance ## PrimitiveOrObject ## Read, true>( \
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field_idx, referrer, self, sizeof(PrimitiveType), &obj); \
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if (LIKELY(field != nullptr)) { \
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return field->Get ## Kind (obj)Ptr; /* NOLINT */ \
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} \
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/* Will throw exception by checking with Thread::Current. */ \
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return 0; \
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} \
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\
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extern "C" int artSet ## Kind ## StaticFromCode(uint32_t field_idx, \
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SetType new_value, \
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ArtMethod* referrer, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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ScopedQuickEntrypointChecks sqec(self); \
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ArtField* field = FindFieldFast( \
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field_idx, referrer, Static ## PrimitiveOrObject ## Write, \
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sizeof(PrimitiveType)); \
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if (UNLIKELY(field == nullptr)) { \
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if (IsObject) { \
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StackHandleScope<1> hs(self); \
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HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper( \
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reinterpret_cast<mirror::Object**>(&new_value))); \
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field = FindFieldFromCode<Static ## PrimitiveOrObject ## Write, true>( \
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field_idx, referrer, self, sizeof(PrimitiveType)); \
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} else { \
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field = FindFieldFromCode<Static ## PrimitiveOrObject ## Write, true>( \
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field_idx, referrer, self, sizeof(PrimitiveType)); \
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} \
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if (UNLIKELY(field == nullptr)) { \
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return -1; \
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} \
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} \
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if (!referrer->SkipAccessChecks() && IsObject && new_value != 0) { \
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StackArtFieldHandleScope<1> rhs(self); \
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ReflectiveHandle<ArtField> field_handle(rhs.NewHandle(field)); \
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if (field->ResolveType().IsNull()) { \
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self->AssertPendingException(); \
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return -1; \
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} \
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field = field_handle.Get(); \
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} \
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field->Set ## Kind <false>(field->GetDeclaringClass(), new_value); \
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return 0; \
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} \
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\
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extern "C" int artSet ## Kind ## InstanceFromCode(uint32_t field_idx, \
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mirror::Object* obj, \
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SetType new_value, \
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ArtMethod* referrer, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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ScopedQuickEntrypointChecks sqec(self); \
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ArtField* field = FindFieldFast( \
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field_idx, referrer, Instance ## PrimitiveOrObject ## Write, \
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sizeof(PrimitiveType)); \
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if (UNLIKELY(field == nullptr || obj == nullptr)) { \
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if (IsObject) { \
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StackHandleScope<1> hs(self); \
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HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper( \
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reinterpret_cast<mirror::Object**>(&new_value))); \
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field = \
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FindInstanceField<Instance ## PrimitiveOrObject ## Write, true>( \
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field_idx, \
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referrer, \
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self, \
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sizeof(PrimitiveType), \
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&obj); \
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} else { \
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field = \
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FindInstanceField<Instance ## PrimitiveOrObject ## Write, true>( \
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field_idx, \
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referrer, \
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self, \
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sizeof(PrimitiveType), \
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&obj); \
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} \
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if (UNLIKELY(field == nullptr)) { \
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return -1; \
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} \
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} \
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if (!referrer->SkipAccessChecks() && IsObject && new_value != 0) { \
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StackArtFieldHandleScope<1> rhs(self); \
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ReflectiveHandle<ArtField> field_handle(rhs.NewHandle(field)); \
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if (field->ResolveType().IsNull()) { \
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self->AssertPendingException(); \
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return -1; \
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} \
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field = field_handle.Get(); \
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} \
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field->Set ## Kind<false>(obj, new_value); \
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return 0; \
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} \
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\
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extern "C" RetType artGet ## Kind ## StaticFromCompiledCode( \
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uint32_t field_idx, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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return artGet ## Kind ## StaticFromCode( \
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field_idx, GetReferrer(self), self); \
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} \
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\
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extern "C" RetType artGet ## Kind ## InstanceFromCompiledCode( \
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uint32_t field_idx, \
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mirror::Object* obj, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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return artGet ## Kind ## InstanceFromCode( \
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field_idx, obj, GetReferrer(self), self); \
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} \
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\
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extern "C" int artSet ## Kind ## StaticFromCompiledCode( \
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uint32_t field_idx, \
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SetType new_value, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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return artSet ## Kind ## StaticFromCode( \
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field_idx, new_value, GetReferrer(self), self); \
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} \
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\
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extern "C" int artSet ## Kind ## InstanceFromCompiledCode( \
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uint32_t field_idx, \
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mirror::Object* obj, \
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SetType new_value, \
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Thread* self) \
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REQUIRES_SHARED(Locks::mutator_lock_) { \
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return artSet ## Kind ## InstanceFromCode( \
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field_idx, obj, new_value, GetReferrer(self), self); \
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}
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// Define these functions:
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//
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// artGetByteStaticFromCode
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// artGetByteInstanceFromCode
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// artSetByteStaticFromCode
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// artSetByteInstanceFromCode
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// artGetByteStaticFromCompiledCode
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// artGetByteInstanceFromCompiledCode
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// artSetByteStaticFromCompiledCode
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// artSetByteInstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(Byte, int8_t, ssize_t, uint32_t, Primitive, false, )
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// Define these functions:
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//
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// artGetBooleanStaticFromCode
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// artGetBooleanInstanceFromCode
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// artSetBooleanStaticFromCode
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// artSetBooleanInstanceFromCode
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// artGetBooleanStaticFromCompiledCode
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// artGetBooleanInstanceFromCompiledCode
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// artSetBooleanStaticFromCompiledCode
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// artSetBooleanInstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(Boolean, int8_t, size_t, uint32_t, Primitive, false, )
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// Define these functions:
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//
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// artGetShortStaticFromCode
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// artGetShortInstanceFromCode
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// artSetShortStaticFromCode
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// artSetShortInstanceFromCode
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// artGetShortStaticFromCompiledCode
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// artGetShortInstanceFromCompiledCode
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// artSetShortStaticFromCompiledCode
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// artSetShortInstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(Short, int16_t, ssize_t, uint16_t, Primitive, false, )
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// Define these functions:
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//
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// artGetCharStaticFromCode
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// artGetCharInstanceFromCode
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// artSetCharStaticFromCode
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// artSetCharInstanceFromCode
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// artGetCharStaticFromCompiledCode
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// artGetCharInstanceFromCompiledCode
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// artSetCharStaticFromCompiledCode
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// artSetCharInstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(Char, int16_t, size_t, uint16_t, Primitive, false, )
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// Define these functions:
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//
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// artGet32StaticFromCode
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// artGet32InstanceFromCode
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// artSet32StaticFromCode
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// artSet32InstanceFromCode
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// artGet32StaticFromCompiledCode
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// artGet32InstanceFromCompiledCode
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// artSet32StaticFromCompiledCode
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// artSet32InstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(32, int32_t, size_t, uint32_t, Primitive, false, )
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// Define these functions:
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//
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// artGet64StaticFromCode
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// artGet64InstanceFromCode
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// artSet64StaticFromCode
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// artSet64InstanceFromCode
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// artGet64StaticFromCompiledCode
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// artGet64InstanceFromCompiledCode
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// artSet64StaticFromCompiledCode
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// artSet64InstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(64, int64_t, uint64_t, uint64_t, Primitive, false, )
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// Define these functions:
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//
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// artGetObjStaticFromCode
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// artGetObjInstanceFromCode
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// artSetObjStaticFromCode
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// artSetObjInstanceFromCode
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// artGetObjStaticFromCompiledCode
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// artGetObjInstanceFromCompiledCode
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// artSetObjStaticFromCompiledCode
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// artSetObjInstanceFromCompiledCode
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//
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ART_GET_FIELD_FROM_CODE(Obj, mirror::HeapReference<mirror::Object>, mirror::Object*,
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mirror::Object*, Object, true, .Ptr())
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#undef ART_GET_FIELD_FROM_CODE
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// To cut on the number of entrypoints, we have shared entries for
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// byte/boolean and char/short for setting an instance or static field. We just
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// forward those to the unsigned variant.
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extern "C" int artSet8StaticFromCompiledCode(uint32_t field_idx,
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uint32_t new_value,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetBooleanStaticFromCode(field_idx, new_value, GetReferrer(self), self);
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}
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extern "C" int artSet16StaticFromCompiledCode(uint32_t field_idx,
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uint16_t new_value,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetCharStaticFromCode(field_idx, new_value, GetReferrer(self), self);
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}
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extern "C" int artSet8InstanceFromCompiledCode(uint32_t field_idx,
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mirror::Object* obj,
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uint8_t new_value,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetBooleanInstanceFromCode(field_idx, obj, new_value, GetReferrer(self), self);
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}
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extern "C" int artSet16InstanceFromCompiledCode(uint32_t field_idx,
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mirror::Object* obj,
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uint16_t new_value,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetCharInstanceFromCode(field_idx, obj, new_value, GetReferrer(self), self);
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}
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extern "C" int artSet8StaticFromCode(uint32_t field_idx,
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uint32_t new_value,
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ArtMethod* referrer,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetBooleanStaticFromCode(field_idx, new_value, referrer, self);
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}
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extern "C" int artSet16StaticFromCode(uint32_t field_idx,
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uint16_t new_value,
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ArtMethod* referrer,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetCharStaticFromCode(field_idx, new_value, referrer, self);
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}
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extern "C" int artSet8InstanceFromCode(uint32_t field_idx,
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mirror::Object* obj,
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uint8_t new_value,
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ArtMethod* referrer,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetBooleanInstanceFromCode(field_idx, obj, new_value, referrer, self);
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}
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extern "C" int artSet16InstanceFromCode(uint32_t field_idx,
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mirror::Object* obj,
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uint16_t new_value,
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ArtMethod* referrer,
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Thread* self)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return artSetCharInstanceFromCode(field_idx, obj, new_value, referrer, self);
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}
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extern "C" mirror::Object* artReadBarrierMark(mirror::Object* obj) {
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DCHECK(kEmitCompilerReadBarrier);
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return ReadBarrier::Mark(obj);
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}
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extern "C" mirror::Object* artReadBarrierSlow(mirror::Object* ref ATTRIBUTE_UNUSED,
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mirror::Object* obj,
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uint32_t offset) {
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// Used only in connection with non-volatile loads.
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DCHECK(kEmitCompilerReadBarrier);
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uint8_t* raw_addr = reinterpret_cast<uint8_t*>(obj) + offset;
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mirror::HeapReference<mirror::Object>* ref_addr =
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reinterpret_cast<mirror::HeapReference<mirror::Object>*>(raw_addr);
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constexpr ReadBarrierOption kReadBarrierOption =
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kUseReadBarrier ? kWithReadBarrier : kWithoutReadBarrier;
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mirror::Object* result =
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ReadBarrier::Barrier<mirror::Object, /* kIsVolatile= */ false, kReadBarrierOption>(
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obj,
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MemberOffset(offset),
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ref_addr);
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return result;
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}
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extern "C" mirror::Object* artReadBarrierForRootSlow(GcRoot<mirror::Object>* root) {
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DCHECK(kEmitCompilerReadBarrier);
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return root->Read();
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}
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} // namespace art
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