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/*
* Copyright (C) 2011 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_ART_METHOD_INL_H_
#define ART_RUNTIME_ART_METHOD_INL_H_
#include "art_method.h"
#include "art_field.h"
#include "base/logging.h"
#include "class_linker-inl.h"
#include "common_throws.h"
#include "dex_file.h"
#include "dex_file-inl.h"
#include "gc_root-inl.h"
#include "jit/profiling_info.h"
#include "mirror/class-inl.h"
#include "mirror/dex_cache-inl.h"
#include "mirror/object-inl.h"
#include "mirror/object_array.h"
#include "oat.h"
#include "quick/quick_method_frame_info.h"
#include "read_barrier-inl.h"
#include "runtime-inl.h"
#include "scoped_thread_state_change.h"
#include "thread-inl.h"
#include "utils.h"
namespace art {
template <ReadBarrierOption kReadBarrierOption>
inline mirror::Class* ArtMethod::GetDeclaringClassUnchecked() {
GcRootSource gc_root_source(this);
return declaring_class_.Read<kReadBarrierOption>(&gc_root_source);
}
template <ReadBarrierOption kReadBarrierOption>
inline mirror::Class* ArtMethod::GetDeclaringClass() {
mirror::Class* result = GetDeclaringClassUnchecked<kReadBarrierOption>();
if (kIsDebugBuild) {
if (!IsRuntimeMethod()) {
CHECK(result != nullptr) << this;
CHECK(result->IsIdxLoaded() || result->IsErroneous())
<< result->GetStatus() << " " << PrettyClass(result);
} else {
CHECK(result == nullptr) << this;
}
}
return result;
}
inline void ArtMethod::SetDeclaringClass(mirror::Class* new_declaring_class) {
declaring_class_ = GcRoot<mirror::Class>(new_declaring_class);
}
inline bool ArtMethod::CASDeclaringClass(mirror::Class* expected_class,
mirror::Class* desired_class) {
GcRoot<mirror::Class> expected_root(expected_class);
GcRoot<mirror::Class> desired_root(desired_class);
return reinterpret_cast<Atomic<GcRoot<mirror::Class>>*>(&declaring_class_)->
CompareExchangeStrongSequentiallyConsistent(
expected_root, desired_root);
}
// AssertSharedHeld doesn't work in GetAccessFlags, so use a NO_THREAD_SAFETY_ANALYSIS helper.
// TODO: Figure out why ASSERT_SHARED_CAPABILITY doesn't work.
template <ReadBarrierOption kReadBarrierOption>
ALWAYS_INLINE static inline void DoGetAccessFlagsHelper(ArtMethod* method)
NO_THREAD_SAFETY_ANALYSIS {
CHECK(method->IsRuntimeMethod() ||
method->GetDeclaringClass<kReadBarrierOption>()->IsIdxLoaded() ||
method->GetDeclaringClass<kReadBarrierOption>()->IsErroneous());
}
template <ReadBarrierOption kReadBarrierOption>
inline uint32_t ArtMethod::GetAccessFlags() {
if (kIsDebugBuild) {
Thread* self = Thread::Current();
if (!Locks::mutator_lock_->IsSharedHeld(self)) {
ScopedObjectAccess soa(self);
CHECK(IsRuntimeMethod() ||
GetDeclaringClass<kReadBarrierOption>()->IsIdxLoaded() ||
GetDeclaringClass<kReadBarrierOption>()->IsErroneous());
} else {
// We cannot use SOA in this case. We might be holding the lock, but may not be in the
// runnable state (e.g., during GC).
Locks::mutator_lock_->AssertSharedHeld(self);
DoGetAccessFlagsHelper<kReadBarrierOption>(this);
}
}
return access_flags_;
}
inline uint16_t ArtMethod::GetMethodIndex() {
DCHECK(IsRuntimeMethod() || GetDeclaringClass()->IsResolved() ||
GetDeclaringClass()->IsErroneous());
return method_index_;
}
inline uint16_t ArtMethod::GetMethodIndexDuringLinking() {
return method_index_;
}
inline uint32_t ArtMethod::GetDexMethodIndex() {
DCHECK(IsRuntimeMethod() || GetDeclaringClass()->IsIdxLoaded() ||
GetDeclaringClass()->IsErroneous());
return dex_method_index_;
}
inline ArtMethod** ArtMethod::GetDexCacheResolvedMethods(size_t pointer_size) {
return GetNativePointer<ArtMethod**>(DexCacheResolvedMethodsOffset(pointer_size),
pointer_size);
}
inline ArtMethod* ArtMethod::GetDexCacheResolvedMethod(uint16_t method_index, size_t ptr_size) {
// NOTE: Unchecked, i.e. not throwing AIOOB. We don't even know the length here
// without accessing the DexCache and we don't want to do that in release build.
DCHECK_LT(method_index,
GetInterfaceMethodIfProxy(ptr_size)->GetDeclaringClass()
->GetDexCache()->NumResolvedMethods());
ArtMethod* method = mirror::DexCache::GetElementPtrSize(GetDexCacheResolvedMethods(ptr_size),
method_index,
ptr_size);
if (LIKELY(method != nullptr)) {
auto* declaring_class = method->GetDeclaringClass();
if (LIKELY(declaring_class == nullptr || !declaring_class->IsErroneous())) {
return method;
}
}
return nullptr;
}
inline void ArtMethod::SetDexCacheResolvedMethod(uint16_t method_index, ArtMethod* new_method,
size_t ptr_size) {
// NOTE: Unchecked, i.e. not throwing AIOOB. We don't even know the length here
// without accessing the DexCache and we don't want to do that in release build.
DCHECK_LT(method_index,
GetInterfaceMethodIfProxy(ptr_size)->GetDeclaringClass()
->GetDexCache()->NumResolvedMethods());
DCHECK(new_method == nullptr || new_method->GetDeclaringClass() != nullptr);
mirror::DexCache::SetElementPtrSize(GetDexCacheResolvedMethods(ptr_size),
method_index,
new_method,
ptr_size);
}
inline bool ArtMethod::HasDexCacheResolvedMethods(size_t pointer_size) {
return GetDexCacheResolvedMethods(pointer_size) != nullptr;
}
inline bool ArtMethod::HasSameDexCacheResolvedMethods(ArtMethod** other_cache,
size_t pointer_size) {
return GetDexCacheResolvedMethods(pointer_size) == other_cache;
}
inline bool ArtMethod::HasSameDexCacheResolvedMethods(ArtMethod* other, size_t pointer_size) {
return GetDexCacheResolvedMethods(pointer_size) ==
other->GetDexCacheResolvedMethods(pointer_size);
}
inline GcRoot<mirror::Class>* ArtMethod::GetDexCacheResolvedTypes(size_t pointer_size) {
return GetNativePointer<GcRoot<mirror::Class>*>(DexCacheResolvedTypesOffset(pointer_size),
pointer_size);
}
template <bool kWithCheck>
inline mirror::Class* ArtMethod::GetDexCacheResolvedType(uint32_t type_index, size_t ptr_size) {
if (kWithCheck) {
mirror::DexCache* dex_cache =
GetInterfaceMethodIfProxy(ptr_size)->GetDeclaringClass()->GetDexCache();
if (UNLIKELY(type_index >= dex_cache->NumResolvedTypes())) {
ThrowArrayIndexOutOfBoundsException(type_index, dex_cache->NumResolvedTypes());
return nullptr;
}
}
mirror::Class* klass = GetDexCacheResolvedTypes(ptr_size)[type_index].Read();
return (klass != nullptr && !klass->IsErroneous()) ? klass : nullptr;
}
inline bool ArtMethod::HasDexCacheResolvedTypes(size_t pointer_size) {
return GetDexCacheResolvedTypes(pointer_size) != nullptr;
}
inline bool ArtMethod::HasSameDexCacheResolvedTypes(GcRoot<mirror::Class>* other_cache,
size_t pointer_size) {
return GetDexCacheResolvedTypes(pointer_size) == other_cache;
}
inline bool ArtMethod::HasSameDexCacheResolvedTypes(ArtMethod* other, size_t pointer_size) {
return GetDexCacheResolvedTypes(pointer_size) == other->GetDexCacheResolvedTypes(pointer_size);
}
inline mirror::Class* ArtMethod::GetClassFromTypeIndex(uint16_t type_idx,
bool resolve,
size_t ptr_size) {
mirror::Class* type = GetDexCacheResolvedType(type_idx, ptr_size);
if (type == nullptr && resolve) {
type = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, this);
CHECK(type != nullptr || Thread::Current()->IsExceptionPending());
}
return type;
}
inline bool ArtMethod::CheckIncompatibleClassChange(InvokeType type) {
switch (type) {
case kStatic:
return !IsStatic();
case kDirect:
return !IsDirect() || IsStatic();
case kVirtual: {
// We have an error if we are direct or a non-default, non-miranda interface method.
mirror::Class* methods_class = GetDeclaringClass();
return IsDirect() || (methods_class->IsInterface() && !IsDefault() && !IsMiranda());
}
case kSuper:
// Constructors and static methods are called with invoke-direct.
return IsConstructor() || IsStatic();
case kInterface: {
mirror::Class* methods_class = GetDeclaringClass();
return IsDirect() || !(methods_class->IsInterface() || methods_class->IsObjectClass());
}
default:
LOG(FATAL) << "Unreachable - invocation type: " << type;
UNREACHABLE();
}
}
inline bool ArtMethod::IsRuntimeMethod() {
return dex_method_index_ == DexFile::kDexNoIndex;
}
inline bool ArtMethod::IsCalleeSaveMethod() {
if (!IsRuntimeMethod()) {
return false;
}
Runtime* runtime = Runtime::Current();
bool result = false;
for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
if (this == runtime->GetCalleeSaveMethod(Runtime::CalleeSaveType(i))) {
result = true;
break;
}
}
return result;
}
inline bool ArtMethod::IsResolutionMethod() {
bool result = this == Runtime::Current()->GetResolutionMethod();
// Check that if we do think it is phony it looks like the resolution method.
DCHECK(!result || IsRuntimeMethod());
return result;
}
inline bool ArtMethod::IsImtUnimplementedMethod() {
bool result = this == Runtime::Current()->GetImtUnimplementedMethod();
// Check that if we do think it is phony it looks like the imt unimplemented method.
DCHECK(!result || IsRuntimeMethod());
return result;
}
inline const DexFile* ArtMethod::GetDexFile() {
return GetDexCache()->GetDexFile();
}
inline const char* ArtMethod::GetDeclaringClassDescriptor() {
uint32_t dex_method_idx = GetDexMethodIndex();
if (UNLIKELY(dex_method_idx == DexFile::kDexNoIndex)) {
return "<runtime method>";
}
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
return dex_file->GetMethodDeclaringClassDescriptor(dex_file->GetMethodId(dex_method_idx));
}
inline const char* ArtMethod::GetShorty(uint32_t* out_length) {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
return dex_file->GetMethodShorty(dex_file->GetMethodId(GetDexMethodIndex()), out_length);
}
inline const Signature ArtMethod::GetSignature() {
uint32_t dex_method_idx = GetDexMethodIndex();
if (dex_method_idx != DexFile::kDexNoIndex) {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
return dex_file->GetMethodSignature(dex_file->GetMethodId(dex_method_idx));
}
return Signature::NoSignature();
}
inline const char* ArtMethod::GetName() {
uint32_t dex_method_idx = GetDexMethodIndex();
if (LIKELY(dex_method_idx != DexFile::kDexNoIndex)) {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
return dex_file->GetMethodName(dex_file->GetMethodId(dex_method_idx));
}
Runtime* const runtime = Runtime::Current();
if (this == runtime->GetResolutionMethod()) {
return "<runtime internal resolution method>";
} else if (this == runtime->GetImtConflictMethod()) {
return "<runtime internal imt conflict method>";
} else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveAll)) {
return "<runtime internal callee-save all registers method>";
} else if (this == runtime->GetCalleeSaveMethod(Runtime::kRefsOnly)) {
return "<runtime internal callee-save reference registers method>";
} else if (this == runtime->GetCalleeSaveMethod(Runtime::kRefsAndArgs)) {
return "<runtime internal callee-save reference and argument registers method>";
} else {
return "<unknown runtime internal method>";
}
}
inline const DexFile::CodeItem* ArtMethod::GetCodeItem() {
return GetDeclaringClass()->GetDexFile().GetCodeItem(GetCodeItemOffset());
}
inline bool ArtMethod::IsResolvedTypeIdx(uint16_t type_idx, size_t ptr_size) {
DCHECK(!IsProxyMethod());
return GetDexCacheResolvedType(type_idx, ptr_size) != nullptr;
}
inline int32_t ArtMethod::GetLineNumFromDexPC(uint32_t dex_pc) {
DCHECK(!IsProxyMethod());
if (dex_pc == DexFile::kDexNoIndex) {
return IsNative() ? -2 : -1;
}
return GetDexFile()->GetLineNumFromPC(this, dex_pc);
}
inline const DexFile::ProtoId& ArtMethod::GetPrototype() {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
return dex_file->GetMethodPrototype(dex_file->GetMethodId(GetDexMethodIndex()));
}
inline const DexFile::TypeList* ArtMethod::GetParameterTypeList() {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
const DexFile::ProtoId& proto = dex_file->GetMethodPrototype(
dex_file->GetMethodId(GetDexMethodIndex()));
return dex_file->GetProtoParameters(proto);
}
inline const char* ArtMethod::GetDeclaringClassSourceFile() {
DCHECK(!IsProxyMethod());
return GetDeclaringClass()->GetSourceFile();
}
inline uint16_t ArtMethod::GetClassDefIndex() {
DCHECK(!IsProxyMethod());
return GetDeclaringClass()->GetDexClassDefIndex();
}
inline const DexFile::ClassDef& ArtMethod::GetClassDef() {
DCHECK(!IsProxyMethod());
return GetDexFile()->GetClassDef(GetClassDefIndex());
}
inline const char* ArtMethod::GetReturnTypeDescriptor() {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
uint16_t return_type_idx = proto_id.return_type_idx_;
return dex_file->GetTypeDescriptor(dex_file->GetTypeId(return_type_idx));
}
inline const char* ArtMethod::GetTypeDescriptorFromTypeIdx(uint16_t type_idx) {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
return dex_file->GetTypeDescriptor(dex_file->GetTypeId(type_idx));
}
inline mirror::ClassLoader* ArtMethod::GetClassLoader() {
DCHECK(!IsProxyMethod());
return GetDeclaringClass()->GetClassLoader();
}
inline mirror::DexCache* ArtMethod::GetDexCache() {
DCHECK(!IsProxyMethod());
return GetDeclaringClass()->GetDexCache();
}
template<ReadBarrierOption kReadBarrierOption>
inline bool ArtMethod::IsProxyMethod() {
return GetDeclaringClass<kReadBarrierOption>()->IsProxyClass();
}
inline ArtMethod* ArtMethod::GetInterfaceMethodIfProxy(size_t pointer_size) {
if (LIKELY(!IsProxyMethod())) {
return this;
}
mirror::Class* klass = GetDeclaringClass();
ArtMethod* interface_method = mirror::DexCache::GetElementPtrSize(
GetDexCacheResolvedMethods(pointer_size),
GetDexMethodIndex(),
pointer_size);
DCHECK(interface_method != nullptr);
DCHECK_EQ(interface_method,
Runtime::Current()->GetClassLinker()->FindMethodForProxy(klass, this));
return interface_method;
}
inline void ArtMethod::SetDexCacheResolvedMethods(ArtMethod** new_dex_cache_methods,
size_t ptr_size) {
SetNativePointer(DexCacheResolvedMethodsOffset(ptr_size), new_dex_cache_methods, ptr_size);
}
inline void ArtMethod::SetDexCacheResolvedTypes(GcRoot<mirror::Class>* new_dex_cache_types,
size_t ptr_size) {
SetNativePointer(DexCacheResolvedTypesOffset(ptr_size), new_dex_cache_types, ptr_size);
}
inline mirror::Class* ArtMethod::GetReturnType(bool resolve, size_t ptr_size) {
DCHECK(!IsProxyMethod());
const DexFile* dex_file = GetDexFile();
const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
uint16_t return_type_idx = proto_id.return_type_idx_;
mirror::Class* type = GetDexCacheResolvedType(return_type_idx, ptr_size);
if (type == nullptr && resolve) {
type = Runtime::Current()->GetClassLinker()->ResolveType(return_type_idx, this);
CHECK(type != nullptr || Thread::Current()->IsExceptionPending());
}
return type;
}
template<ReadBarrierOption kReadBarrierOption, typename RootVisitorType>
void ArtMethod::VisitRoots(RootVisitorType& visitor, size_t pointer_size) {
if (LIKELY(!declaring_class_.IsNull())) {
visitor.VisitRoot(declaring_class_.AddressWithoutBarrier());
mirror::Class* klass = declaring_class_.Read<kReadBarrierOption>();
if (UNLIKELY(klass->IsProxyClass())) {
// For normal methods, dex cache shortcuts will be visited through the declaring class.
// However, for proxies we need to keep the interface method alive, so we visit its roots.
ArtMethod* interface_method = mirror::DexCache::GetElementPtrSize(
GetDexCacheResolvedMethods(pointer_size),
GetDexMethodIndex(),
pointer_size);
DCHECK(interface_method != nullptr);
DCHECK_EQ(interface_method,
Runtime::Current()->GetClassLinker()->FindMethodForProxy<kReadBarrierOption>(
klass, this));
interface_method->VisitRoots(visitor, pointer_size);
}
// We know we don't have profiling information if the class hasn't been verified. Note
// that this check also ensures the IsNative call can be made, as IsNative expects a fully
// created class (and not a retired one).
if (klass->IsVerified()) {
// Runtime methods and native methods use the same field as the profiling info for
// storing their own data (jni entrypoint for native methods, and ImtConflictTable for
// some runtime methods).
if (!IsNative<kReadBarrierOption>() && !IsRuntimeMethod()) {
ProfilingInfo* profiling_info = GetProfilingInfo(pointer_size);
if (profiling_info != nullptr) {
profiling_info->VisitRoots(visitor);
}
}
}
}
}
template <typename Visitor>
inline void ArtMethod::UpdateObjectsForImageRelocation(const Visitor& visitor,
size_t pointer_size) {
mirror::Class* old_class = GetDeclaringClassUnchecked<kWithoutReadBarrier>();
mirror::Class* new_class = visitor(old_class);
if (old_class != new_class) {
SetDeclaringClass(new_class);
}
ArtMethod** old_methods = GetDexCacheResolvedMethods(pointer_size);
ArtMethod** new_methods = visitor(old_methods);
if (old_methods != new_methods) {
SetDexCacheResolvedMethods(new_methods, pointer_size);
}
GcRoot<mirror::Class>* old_types = GetDexCacheResolvedTypes(pointer_size);
GcRoot<mirror::Class>* new_types = visitor(old_types);
if (old_types != new_types) {
SetDexCacheResolvedTypes(new_types, pointer_size);
}
}
template <ReadBarrierOption kReadBarrierOption, typename Visitor>
inline void ArtMethod::UpdateEntrypoints(const Visitor& visitor, size_t pointer_size) {
if (IsNative<kReadBarrierOption>()) {
const void* old_native_code = GetEntryPointFromJniPtrSize(pointer_size);
const void* new_native_code = visitor(old_native_code);
if (old_native_code != new_native_code) {
SetEntryPointFromJniPtrSize(new_native_code, pointer_size);
}
} else {
DCHECK(GetEntryPointFromJniPtrSize(pointer_size) == nullptr);
}
const void* old_code = GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
const void* new_code = visitor(old_code);
if (old_code != new_code) {
SetEntryPointFromQuickCompiledCodePtrSize(new_code, pointer_size);
}
}
} // namespace art
#endif // ART_RUNTIME_ART_METHOD_INL_H_