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/*
* Copyright (C) 2018 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 "intrinsic_objects.h"
#include "art_field-inl.h"
#include "base/casts.h"
#include "base/logging.h"
#include "intrinsics.h"
#include "oat/image.h"
#include "obj_ptr-inl.h"
#include "well_known_classes.h"
namespace art HIDDEN {
static constexpr size_t kIntrinsicObjectsOffset =
enum_cast<size_t>(ImageHeader::kIntrinsicObjectsStart);
template <typename T>
static int32_t FillIntrinsicsObjects(
ArtField* cache_field,
ObjPtr<mirror::ObjectArray<mirror::Object>> live_objects,
int32_t expected_low,
int32_t expected_high,
T&& type_check,
int32_t index)
REQUIRES_SHARED(Locks::mutator_lock_) {
ObjPtr<mirror::ObjectArray<mirror::Object>> cache =
ObjPtr<mirror::ObjectArray<mirror::Object>>::DownCast(
cache_field->GetObject(cache_field->GetDeclaringClass()));
int32_t length = expected_high - expected_low + 1;
DCHECK_EQ(length, cache->GetLength());
for (int32_t i = 0; i != length; ++i) {
ObjPtr<mirror::Object> value = cache->GetWithoutChecks(i);
live_objects->Set(index + i, value);
type_check(value, expected_low + i);
}
return index + length;
}
void IntrinsicObjects::FillIntrinsicObjects(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects, size_t start_index) {
DCHECK_EQ(start_index, ImageHeader::kIntrinsicObjectsStart);
int32_t index = dchecked_integral_cast<int32_t>(start_index);
#define FILL_OBJECTS(name, low, high, type, offset) \
index = FillIntrinsicsObjects( \
WellKnownClasses::java_lang_ ##name ##_ ##name ##Cache_cache, \
boot_image_live_objects, \
low, \
high, \
[](ObjPtr<mirror::Object> obj, int32_t expected) REQUIRES_SHARED(Locks::mutator_lock_) { \
CHECK_EQ(expected, WellKnownClasses::java_lang_ ##name ##_value->Get ##name(obj)); \
}, \
index);
BOXED_TYPES(FILL_OBJECTS)
#undef FILL_OBJECTS
DCHECK_EQ(dchecked_integral_cast<size_t>(index), start_index + GetNumberOfIntrinsicObjects());
}
static bool HasIntrinsicObjects(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(boot_image_live_objects != nullptr);
uint32_t length = static_cast<uint32_t>(boot_image_live_objects->GetLength());
DCHECK_GE(length, kIntrinsicObjectsOffset);
return length != kIntrinsicObjectsOffset;
}
ObjPtr<mirror::Object> IntrinsicObjects::GetValueOfObject(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects,
size_t start_index,
uint32_t index) {
DCHECK(HasIntrinsicObjects(boot_image_live_objects));
// No need for read barrier for boot image object or for verifying the value that was just stored.
ObjPtr<mirror::Object> result =
boot_image_live_objects->GetWithoutChecks<kVerifyNone, kWithoutReadBarrier>(
kIntrinsicObjectsOffset + start_index + index);
DCHECK(result != nullptr);
return result;
}
MemberOffset IntrinsicObjects::GetValueOfArrayDataOffset(
ObjPtr<mirror::ObjectArray<mirror::Object>> boot_image_live_objects,
size_t start_index) {
DCHECK(HasIntrinsicObjects(boot_image_live_objects));
MemberOffset result =
mirror::ObjectArray<mirror::Object>::OffsetOfElement(kIntrinsicObjectsOffset + start_index);
DCHECK_EQ(GetValueOfObject(boot_image_live_objects, start_index, 0u),
(boot_image_live_objects
->GetFieldObject<mirror::Object, kVerifyNone, kWithoutReadBarrier>(result)));
return result;
}
} // namespace art
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