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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdint.h>
#include "art_field-inl.h"
#include "art_method-inl.h"
#include "base/callee_save_type.h"
#include "callee_save_frame.h"
#include "dex/dex_file-inl.h"
#include "entrypoints/entrypoint_utils-inl.h"
#include "gc_root-inl.h"
#include "mirror/class-inl.h"
#include "mirror/object_reference.h"
namespace art {
// Helper function to do a null check after trying to resolve the field. Not for statics since obj
// does not exist there. There is a suspend check, object is a double pointer to update the value
// in the caller in case it moves.
template<FindFieldType type, bool kAccessCheck>
ALWAYS_INLINE static inline ArtField* FindInstanceField(uint32_t field_idx,
ArtMethod* referrer,
Thread* self,
size_t size,
mirror::Object** obj)
REQUIRES(!Roles::uninterruptible_)
REQUIRES_SHARED(Locks::mutator_lock_) {
StackHandleScope<1> hs(self);
HandleWrapper<mirror::Object> h(hs.NewHandleWrapper(obj));
ArtField* field = FindFieldFromCode<type, kAccessCheck>(field_idx, referrer, self, size);
if (LIKELY(field != nullptr) && UNLIKELY(h == nullptr)) {
ThrowNullPointerExceptionForFieldAccess(field, (type & FindFieldFlags::ReadBit) != 0);
return nullptr;
}
return field;
}
static ArtMethod* GetReferrer(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_) {
if (kIsDebugBuild) {
// stub_test doesn't call this code with a proper frame, so get the outer, and if
// it does not have compiled code return it.
ArtMethod* outer = GetCalleeSaveOuterMethod(self, CalleeSaveType::kSaveRefsOnly);
if (outer->GetEntryPointFromQuickCompiledCode() == nullptr) {
return outer;
}
}
return GetCalleeSaveMethodCallerAndOuterMethod(self, CalleeSaveType::kSaveRefsOnly).caller;
}
// Macro used to define this set of functions:
//
// art{Get,Set}<Kind>{Static,Instance}FromCode
// art{Get,Set}<Kind>{Static,Instance}FromCompiledCode
//
#define ART_GET_FIELD_FROM_CODE(Kind, PrimitiveType, RetType, SetType, \
PrimitiveOrObject, IsObject, Ptr) \
extern "C" RetType artGet ## Kind ## StaticFromCode(uint32_t field_idx, \
ArtMethod* referrer, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
ScopedQuickEntrypointChecks sqec(self); \
ArtField* field = FindFieldFast( \
field_idx, referrer, Static ## PrimitiveOrObject ## Read, \
sizeof(PrimitiveType)); \
if (LIKELY(field != nullptr)) { \
return field->Get ## Kind (field->GetDeclaringClass())Ptr; /* NOLINT */ \
} \
field = FindFieldFromCode<Static ## PrimitiveOrObject ## Read, true>( \
field_idx, referrer, self, sizeof(PrimitiveType)); \
if (LIKELY(field != nullptr)) { \
return field->Get ## Kind (field->GetDeclaringClass())Ptr; /* NOLINT */ \
} \
/* Will throw exception by checking with Thread::Current. */ \
return 0; \
} \
\
extern "C" RetType artGet ## Kind ## InstanceFromCode(uint32_t field_idx, \
mirror::Object* obj, \
ArtMethod* referrer, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
ScopedQuickEntrypointChecks sqec(self); \
ArtField* field = FindFieldFast( \
field_idx, referrer, Instance ## PrimitiveOrObject ## Read, \
sizeof(PrimitiveType)); \
if (LIKELY(field != nullptr) && obj != nullptr) { \
return field->Get ## Kind (obj)Ptr; /* NOLINT */ \
} \
field = FindInstanceField<Instance ## PrimitiveOrObject ## Read, true>( \
field_idx, referrer, self, sizeof(PrimitiveType), &obj); \
if (LIKELY(field != nullptr)) { \
return field->Get ## Kind (obj)Ptr; /* NOLINT */ \
} \
/* Will throw exception by checking with Thread::Current. */ \
return 0; \
} \
\
extern "C" int artSet ## Kind ## StaticFromCode(uint32_t field_idx, \
SetType new_value, \
ArtMethod* referrer, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
ScopedQuickEntrypointChecks sqec(self); \
ArtField* field = FindFieldFast( \
field_idx, referrer, Static ## PrimitiveOrObject ## Write, \
sizeof(PrimitiveType)); \
if (UNLIKELY(field == nullptr)) { \
if (IsObject) { \
StackHandleScope<1> hs(self); \
HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper( \
reinterpret_cast<mirror::Object**>(&new_value))); \
field = FindFieldFromCode<Static ## PrimitiveOrObject ## Write, true>( \
field_idx, referrer, self, sizeof(PrimitiveType)); \
} else { \
field = FindFieldFromCode<Static ## PrimitiveOrObject ## Write, true>( \
field_idx, referrer, self, sizeof(PrimitiveType)); \
} \
if (UNLIKELY(field == nullptr)) { \
return -1; \
} \
} \
if (!referrer->SkipAccessChecks() && IsObject && new_value != 0) { \
StackArtFieldHandleScope<1> rhs(self); \
ReflectiveHandle<ArtField> field_handle(rhs.NewHandle(field)); \
if (field->ResolveType().IsNull()) { \
self->AssertPendingException(); \
return -1; \
} \
field = field_handle.Get(); \
} \
field->Set ## Kind <false>(field->GetDeclaringClass(), new_value); \
return 0; \
} \
\
extern "C" int artSet ## Kind ## InstanceFromCode(uint32_t field_idx, \
mirror::Object* obj, \
SetType new_value, \
ArtMethod* referrer, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
ScopedQuickEntrypointChecks sqec(self); \
ArtField* field = FindFieldFast( \
field_idx, referrer, Instance ## PrimitiveOrObject ## Write, \
sizeof(PrimitiveType)); \
if (UNLIKELY(field == nullptr || obj == nullptr)) { \
if (IsObject) { \
StackHandleScope<1> hs(self); \
HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper( \
reinterpret_cast<mirror::Object**>(&new_value))); \
field = \
FindInstanceField<Instance ## PrimitiveOrObject ## Write, true>( \
field_idx, \
referrer, \
self, \
sizeof(PrimitiveType), \
&obj); \
} else { \
field = \
FindInstanceField<Instance ## PrimitiveOrObject ## Write, true>( \
field_idx, \
referrer, \
self, \
sizeof(PrimitiveType), \
&obj); \
} \
if (UNLIKELY(field == nullptr)) { \
return -1; \
} \
} \
if (!referrer->SkipAccessChecks() && IsObject && new_value != 0) { \
StackArtFieldHandleScope<1> rhs(self); \
ReflectiveHandle<ArtField> field_handle(rhs.NewHandle(field)); \
if (field->ResolveType().IsNull()) { \
self->AssertPendingException(); \
return -1; \
} \
field = field_handle.Get(); \
} \
field->Set ## Kind<false>(obj, new_value); \
return 0; \
} \
\
extern "C" RetType artGet ## Kind ## StaticFromCompiledCode( \
uint32_t field_idx, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
return artGet ## Kind ## StaticFromCode( \
field_idx, GetReferrer(self), self); \
} \
\
extern "C" RetType artGet ## Kind ## InstanceFromCompiledCode( \
uint32_t field_idx, \
mirror::Object* obj, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
return artGet ## Kind ## InstanceFromCode( \
field_idx, obj, GetReferrer(self), self); \
} \
\
extern "C" int artSet ## Kind ## StaticFromCompiledCode( \
uint32_t field_idx, \
SetType new_value, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
return artSet ## Kind ## StaticFromCode( \
field_idx, new_value, GetReferrer(self), self); \
} \
\
extern "C" int artSet ## Kind ## InstanceFromCompiledCode( \
uint32_t field_idx, \
mirror::Object* obj, \
SetType new_value, \
Thread* self) \
REQUIRES_SHARED(Locks::mutator_lock_) { \
return artSet ## Kind ## InstanceFromCode( \
field_idx, obj, new_value, GetReferrer(self), self); \
}
// Define these functions:
//
// artGetByteStaticFromCode
// artGetByteInstanceFromCode
// artSetByteStaticFromCode
// artSetByteInstanceFromCode
// artGetByteStaticFromCompiledCode
// artGetByteInstanceFromCompiledCode
// artSetByteStaticFromCompiledCode
// artSetByteInstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(Byte, int8_t, ssize_t, uint32_t, Primitive, false, )
// Define these functions:
//
// artGetBooleanStaticFromCode
// artGetBooleanInstanceFromCode
// artSetBooleanStaticFromCode
// artSetBooleanInstanceFromCode
// artGetBooleanStaticFromCompiledCode
// artGetBooleanInstanceFromCompiledCode
// artSetBooleanStaticFromCompiledCode
// artSetBooleanInstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(Boolean, int8_t, size_t, uint32_t, Primitive, false, )
// Define these functions:
//
// artGetShortStaticFromCode
// artGetShortInstanceFromCode
// artSetShortStaticFromCode
// artSetShortInstanceFromCode
// artGetShortStaticFromCompiledCode
// artGetShortInstanceFromCompiledCode
// artSetShortStaticFromCompiledCode
// artSetShortInstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(Short, int16_t, ssize_t, uint16_t, Primitive, false, )
// Define these functions:
//
// artGetCharStaticFromCode
// artGetCharInstanceFromCode
// artSetCharStaticFromCode
// artSetCharInstanceFromCode
// artGetCharStaticFromCompiledCode
// artGetCharInstanceFromCompiledCode
// artSetCharStaticFromCompiledCode
// artSetCharInstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(Char, int16_t, size_t, uint16_t, Primitive, false, )
// Define these functions:
//
// artGet32StaticFromCode
// artGet32InstanceFromCode
// artSet32StaticFromCode
// artSet32InstanceFromCode
// artGet32StaticFromCompiledCode
// artGet32InstanceFromCompiledCode
// artSet32StaticFromCompiledCode
// artSet32InstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(32, int32_t, size_t, uint32_t, Primitive, false, )
// Define these functions:
//
// artGet64StaticFromCode
// artGet64InstanceFromCode
// artSet64StaticFromCode
// artSet64InstanceFromCode
// artGet64StaticFromCompiledCode
// artGet64InstanceFromCompiledCode
// artSet64StaticFromCompiledCode
// artSet64InstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(64, int64_t, uint64_t, uint64_t, Primitive, false, )
// Define these functions:
//
// artGetObjStaticFromCode
// artGetObjInstanceFromCode
// artSetObjStaticFromCode
// artSetObjInstanceFromCode
// artGetObjStaticFromCompiledCode
// artGetObjInstanceFromCompiledCode
// artSetObjStaticFromCompiledCode
// artSetObjInstanceFromCompiledCode
//
ART_GET_FIELD_FROM_CODE(Obj, mirror::HeapReference<mirror::Object>, mirror::Object*,
mirror::Object*, Object, true, .Ptr())
#undef ART_GET_FIELD_FROM_CODE
// To cut on the number of entrypoints, we have shared entries for
// byte/boolean and char/short for setting an instance or static field. We just
// forward those to the unsigned variant.
extern "C" int artSet8StaticFromCompiledCode(uint32_t field_idx,
uint32_t new_value,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetBooleanStaticFromCode(field_idx, new_value, GetReferrer(self), self);
}
extern "C" int artSet16StaticFromCompiledCode(uint32_t field_idx,
uint16_t new_value,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetCharStaticFromCode(field_idx, new_value, GetReferrer(self), self);
}
extern "C" int artSet8InstanceFromCompiledCode(uint32_t field_idx,
mirror::Object* obj,
uint8_t new_value,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetBooleanInstanceFromCode(field_idx, obj, new_value, GetReferrer(self), self);
}
extern "C" int artSet16InstanceFromCompiledCode(uint32_t field_idx,
mirror::Object* obj,
uint16_t new_value,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetCharInstanceFromCode(field_idx, obj, new_value, GetReferrer(self), self);
}
extern "C" int artSet8StaticFromCode(uint32_t field_idx,
uint32_t new_value,
ArtMethod* referrer,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetBooleanStaticFromCode(field_idx, new_value, referrer, self);
}
extern "C" int artSet16StaticFromCode(uint32_t field_idx,
uint16_t new_value,
ArtMethod* referrer,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetCharStaticFromCode(field_idx, new_value, referrer, self);
}
extern "C" int artSet8InstanceFromCode(uint32_t field_idx,
mirror::Object* obj,
uint8_t new_value,
ArtMethod* referrer,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetBooleanInstanceFromCode(field_idx, obj, new_value, referrer, self);
}
extern "C" int artSet16InstanceFromCode(uint32_t field_idx,
mirror::Object* obj,
uint16_t new_value,
ArtMethod* referrer,
Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
return artSetCharInstanceFromCode(field_idx, obj, new_value, referrer, self);
}
extern "C" mirror::Object* artReadBarrierMark(mirror::Object* obj) {
DCHECK(kEmitCompilerReadBarrier);
return ReadBarrier::Mark(obj);
}
extern "C" mirror::Object* artReadBarrierSlow(mirror::Object* ref ATTRIBUTE_UNUSED,
mirror::Object* obj,
uint32_t offset) {
// Used only in connection with non-volatile loads.
DCHECK(kEmitCompilerReadBarrier);
uint8_t* raw_addr = reinterpret_cast<uint8_t*>(obj) + offset;
mirror::HeapReference<mirror::Object>* ref_addr =
reinterpret_cast<mirror::HeapReference<mirror::Object>*>(raw_addr);
constexpr ReadBarrierOption kReadBarrierOption =
kUseReadBarrier ? kWithReadBarrier : kWithoutReadBarrier;
mirror::Object* result =
ReadBarrier::Barrier<mirror::Object, /* kIsVolatile= */ false, kReadBarrierOption>(
obj,
MemberOffset(offset),
ref_addr);
return result;
}
extern "C" mirror::Object* artReadBarrierForRootSlow(GcRoot<mirror::Object>* root) {
DCHECK(kEmitCompilerReadBarrier);
return root->Read();
}
} // namespace art