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/*
* Copyright (C) 2016 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.
*/
#ifndef ART_RUNTIME_COMMON_DEX_OPERATIONS_H_
#define ART_RUNTIME_COMMON_DEX_OPERATIONS_H_
#include "android-base/logging.h"
#include "art_field.h"
#include "art_method.h"
#include "base/locks.h"
#include "base/macros.h"
#include "class_linker.h"
#include "dex/code_item_accessors.h"
#include "dex/dex_file_structs.h"
#include "dex/primitive.h"
#include "entrypoints/entrypoint_utils.h"
#include "handle_scope-inl.h"
#include "instrumentation.h"
#include "interpreter/interpreter.h"
#include "interpreter/shadow_frame.h"
#include "interpreter/unstarted_runtime.h"
#include "jvalue-inl.h"
#include "mirror/class.h"
#include "mirror/object.h"
#include "obj_ptr-inl.h"
#include "reflective_handle.h"
#include "reflective_handle_scope.h"
#include "runtime.h"
#include "stack.h"
#include "thread.h"
namespace art {
namespace interpreter {
void ArtInterpreterToInterpreterBridge(Thread* self,
const dex::CodeItem* code_item,
ShadowFrame* shadow_frame,
JValue* result)
REQUIRES_SHARED(Locks::mutator_lock_);
void ArtInterpreterToCompiledCodeBridge(Thread* self,
ArtMethod* caller,
ShadowFrame* shadow_frame,
uint16_t arg_offset,
JValue* result);
} // namespace interpreter
inline bool EnsureInitialized(Thread* self, ShadowFrame* shadow_frame)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (!NeedsClinitCheckBeforeCall(shadow_frame->GetMethod())) {
return true;
}
ObjPtr<mirror::Class> declaring_class = shadow_frame->GetMethod()->GetDeclaringClass();
if (LIKELY(declaring_class->IsVisiblyInitialized())) {
return true;
}
// Save the shadow frame.
ScopedStackedShadowFramePusher pusher(self, shadow_frame);
StackHandleScope<1> hs(self);
Handle<mirror::Class> h_class(hs.NewHandle(declaring_class));
if (UNLIKELY(!Runtime::Current()->GetClassLinker()->EnsureInitialized(
self, h_class, /*can_init_fields=*/ true, /*can_init_parents=*/ true))) {
DCHECK(self->IsExceptionPending());
return false;
}
DCHECK(h_class->IsInitializing());
return true;
}
inline void PerformCall(Thread* self,
const CodeItemDataAccessor& accessor,
ArtMethod* caller_method,
const size_t first_dest_reg,
ShadowFrame* callee_frame,
JValue* result,
bool use_interpreter_entrypoint)
REQUIRES_SHARED(Locks::mutator_lock_) {
if (UNLIKELY(!Runtime::Current()->IsStarted())) {
interpreter::UnstartedRuntime::Invoke(self, accessor, callee_frame, result, first_dest_reg);
return;
}
if (!EnsureInitialized(self, callee_frame)) {
return;
}
if (use_interpreter_entrypoint) {
interpreter::ArtInterpreterToInterpreterBridge(self, accessor, callee_frame, result);
} else {
interpreter::ArtInterpreterToCompiledCodeBridge(
self, caller_method, callee_frame, first_dest_reg, result);
}
}
template <typename T>
inline void DCheckStaticState(Thread* self, T* entity) REQUIRES_SHARED(Locks::mutator_lock_) {
if (kIsDebugBuild) {
ObjPtr<mirror::Class> klass = entity->GetDeclaringClass();
if (entity->IsStatic()) {
klass->AssertInitializedOrInitializingInThread(self);
} else {
CHECK(klass->IsInitializing() || klass->IsErroneousResolved());
}
}
}
template<Primitive::Type field_type>
static ALWAYS_INLINE bool DoFieldGetCommon(Thread* self,
const ShadowFrame& shadow_frame,
ObjPtr<mirror::Object> obj,
ArtField* field,
JValue* result)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCheckStaticState(self, field);
// Report this field access to instrumentation if needed.
instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
if (UNLIKELY(instrumentation->HasFieldReadListeners())) {
StackHandleScope<1> hs(self);
StackArtFieldHandleScope<1> rhs(self);
// Wrap in handle wrapper in case the listener does thread suspension.
HandleWrapperObjPtr<mirror::Object> h(hs.NewHandleWrapper(&obj));
ReflectiveHandleWrapper<ArtField> fh(rhs.NewReflectiveHandleWrapper(&field));
ObjPtr<mirror::Object> this_object;
if (!field->IsStatic()) {
this_object = obj;
}
instrumentation->FieldReadEvent(self,
this_object,
shadow_frame.GetMethod(),
shadow_frame.GetDexPC(),
field);
if (UNLIKELY(self->IsExceptionPending())) {
return false;
}
}
switch (field_type) {
case Primitive::kPrimBoolean:
result->SetZ(field->GetBoolean(obj));
break;
case Primitive::kPrimByte:
result->SetB(field->GetByte(obj));
break;
case Primitive::kPrimChar:
result->SetC(field->GetChar(obj));
break;
case Primitive::kPrimShort:
result->SetS(field->GetShort(obj));
break;
case Primitive::kPrimInt:
result->SetI(field->GetInt(obj));
break;
case Primitive::kPrimLong:
result->SetJ(field->GetLong(obj));
break;
case Primitive::kPrimNot:
result->SetL(field->GetObject(obj));
break;
case Primitive::kPrimVoid:
LOG(FATAL) << "Unreachable " << field_type;
break;
}
return true;
}
template<Primitive::Type field_type, bool do_assignability_check, bool transaction_active>
ALWAYS_INLINE bool DoFieldPutCommon(Thread* self,
const ShadowFrame& shadow_frame,
ObjPtr<mirror::Object> obj,
ArtField* field,
JValue& value)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCheckStaticState(self, field);
// Report this field access to instrumentation if needed. Since we only have the offset of
// the field from the base of the object, we need to look for it first.
instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
if (UNLIKELY(instrumentation->HasFieldWriteListeners())) {
StackHandleScope<2> hs(self);
StackArtFieldHandleScope<1> rhs(self);
// Save this and return value (if needed) in case the instrumentation causes a suspend.
HandleWrapperObjPtr<mirror::Object> h(hs.NewHandleWrapper(&obj));
ReflectiveHandleWrapper<ArtField> fh(rhs.NewReflectiveHandleWrapper(&field));
ObjPtr<mirror::Object> this_object = field->IsStatic() ? nullptr : obj;
mirror::Object* fake_root = nullptr;
HandleWrapper<mirror::Object> ret(hs.NewHandleWrapper<mirror::Object>(
field_type == Primitive::kPrimNot ? value.GetGCRoot() : &fake_root));
instrumentation->FieldWriteEvent(self,
this_object,
shadow_frame.GetMethod(),
shadow_frame.GetDexPC(),
field,
value);
if (UNLIKELY(self->IsExceptionPending())) {
return false;
}
if (shadow_frame.GetForcePopFrame()) {
// We need to check this here since we expect that the FieldWriteEvent happens before the
// actual field write. If one pops the stack we should not modify the field. The next
// instruction will force a pop. Return true.
DCHECK(Runtime::Current()->AreNonStandardExitsEnabled());
return true;
}
}
switch (field_type) {
case Primitive::kPrimBoolean:
field->SetBoolean<transaction_active>(obj, value.GetZ());
break;
case Primitive::kPrimByte:
field->SetByte<transaction_active>(obj, value.GetB());
break;
case Primitive::kPrimChar:
field->SetChar<transaction_active>(obj, value.GetC());
break;
case Primitive::kPrimShort:
field->SetShort<transaction_active>(obj, value.GetS());
break;
case Primitive::kPrimInt:
field->SetInt<transaction_active>(obj, value.GetI());
break;
case Primitive::kPrimLong:
field->SetLong<transaction_active>(obj, value.GetJ());
break;
case Primitive::kPrimNot: {
ObjPtr<mirror::Object> reg = value.GetL();
if (do_assignability_check && reg != nullptr) {
// FieldHelper::GetType can resolve classes, use a handle wrapper which will restore the
// object in the destructor.
ObjPtr<mirror::Class> field_class;
{
StackHandleScope<2> hs(self);
StackArtFieldHandleScope<1> rhs(self);
HandleWrapperObjPtr<mirror::Object> h_reg(hs.NewHandleWrapper(&reg));
HandleWrapperObjPtr<mirror::Object> h_obj(hs.NewHandleWrapper(&obj));
ReflectiveHandleWrapper<ArtField> fh(rhs.NewReflectiveHandleWrapper(&field));
field_class = field->ResolveType();
}
// ArtField::ResolveType() may fail as evidenced with a dexing bug (b/78788577).
if (UNLIKELY(field_class.IsNull())) {
Thread::Current()->AssertPendingException();
return false;
}
if (UNLIKELY(!reg->VerifierInstanceOf(field_class))) {
// This should never happen.
std::string temp1, temp2, temp3;
self->ThrowNewExceptionF("Ljava/lang/InternalError;",
"Put '%s' that is not instance of field '%s' in '%s'",
reg->GetClass()->GetDescriptor(&temp1),
field_class->GetDescriptor(&temp2),
field->GetDeclaringClass()->GetDescriptor(&temp3));
return false;
}
}
field->SetObj<transaction_active>(obj, reg);
break;
}
case Primitive::kPrimVoid: {
LOG(FATAL) << "Unreachable " << field_type;
break;
}
}
if (transaction_active) {
if (UNLIKELY(self->IsExceptionPending())) {
return false;
}
}
return true;
}
} // namespace art
#endif // ART_RUNTIME_COMMON_DEX_OPERATIONS_H_