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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 "art_method-inl.h"
#include "base/callee_save_type.h"
#include "callee_save_frame.h"
#include "entrypoints/entrypoint_utils-inl.h"
#include "class_linker-inl.h"
#include "class_table-inl.h"
#include "dex_file-inl.h"
#include "dex_file_types.h"
#include "gc/heap.h"
#include "mirror/class-inl.h"
#include "mirror/class_loader.h"
#include "mirror/object_array-inl.h"
#include "mirror/object-inl.h"
#include "oat_file.h"
#include "runtime.h"
namespace art {
static inline void BssWriteBarrier(ArtMethod* outer_method) REQUIRES_SHARED(Locks::mutator_lock_) {
// For AOT code, we need a write barrier for the class loader that holds the
// GC roots in the .bss.
const DexFile* dex_file = outer_method->GetDexFile();
if (dex_file != nullptr &&
dex_file->GetOatDexFile() != nullptr &&
!dex_file->GetOatDexFile()->GetOatFile()->GetBssGcRoots().empty()) {
ObjPtr<mirror::ClassLoader> class_loader = outer_method->GetClassLoader();
if (kIsDebugBuild) {
ClassTable* class_table =
Runtime::Current()->GetClassLinker()->ClassTableForClassLoader(class_loader);
CHECK(class_table != nullptr &&
!class_table->InsertOatFile(dex_file->GetOatDexFile()->GetOatFile()))
<< "Oat file with .bss GC roots was not registered in class table: "
<< dex_file->GetOatDexFile()->GetOatFile()->GetLocation();
}
if (class_loader != nullptr) {
// Note that we emit the barrier before the compiled code stores the String or Class
// as a GC root. This is OK as there is no suspend point point in between.
Runtime::Current()->GetHeap()->WriteBarrierEveryFieldOf(class_loader);
} else {
Runtime::Current()->GetClassLinker()->WriteBarrierForBootOatFileBssRoots(
dex_file->GetOatDexFile()->GetOatFile());
}
}
}
extern "C" mirror::Class* artInitializeStaticStorageFromCode(uint32_t type_idx, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
// Called to ensure static storage base is initialized for direct static field reads and writes.
// A class may be accessing another class' fields when it doesn't have access, as access has been
// given by inheritance.
ScopedQuickEntrypointChecks sqec(self);
auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
CalleeSaveType::kSaveEverything);
ArtMethod* caller = caller_and_outer.caller;
mirror::Class* result =
ResolveVerifyAndClinit(dex::TypeIndex(type_idx), caller, self, true, false);
if (LIKELY(result != nullptr)) {
BssWriteBarrier(caller_and_outer.outer_method);
}
return result;
}
extern "C" mirror::Class* artInitializeTypeFromCode(uint32_t type_idx, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
// Called when method->dex_cache_resolved_types_[] misses.
ScopedQuickEntrypointChecks sqec(self);
auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
CalleeSaveType::kSaveEverything);
ArtMethod* caller = caller_and_outer.caller;
mirror::Class* result =
ResolveVerifyAndClinit(dex::TypeIndex(type_idx), caller, self, false, false);
if (LIKELY(result != nullptr)) {
BssWriteBarrier(caller_and_outer.outer_method);
}
return result;
}
extern "C" mirror::Class* artInitializeTypeAndVerifyAccessFromCode(uint32_t type_idx, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
// Called when caller isn't guaranteed to have access to a type and the dex cache may be
// unpopulated.
ScopedQuickEntrypointChecks sqec(self);
auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
CalleeSaveType::kSaveEverything);
ArtMethod* caller = caller_and_outer.caller;
mirror::Class* result =
ResolveVerifyAndClinit(dex::TypeIndex(type_idx), caller, self, false, true);
if (LIKELY(result != nullptr)) {
BssWriteBarrier(caller_and_outer.outer_method);
}
return result;
}
extern "C" mirror::String* artResolveStringFromCode(int32_t string_idx, Thread* self)
REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedQuickEntrypointChecks sqec(self);
auto caller_and_outer = GetCalleeSaveMethodCallerAndOuterMethod(self,
CalleeSaveType::kSaveEverything);
ArtMethod* caller = caller_and_outer.caller;
mirror::String* result = ResolveStringFromCode(caller, dex::StringIndex(string_idx));
if (LIKELY(result != nullptr)) {
BssWriteBarrier(caller_and_outer.outer_method);
}
return result;
}
} // namespace art
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