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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.
*/
#ifndef ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_
#define ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_
#include "compiler_driver.h"
#include "art_field-inl.h"
#include "art_method-inl.h"
#include "base/enums.h"
#include "class_linker-inl.h"
#include "dex_compilation_unit.h"
#include "mirror/class_loader.h"
#include "mirror/dex_cache-inl.h"
#include "scoped_thread_state_change-inl.h"
#include "handle_scope-inl.h"
namespace art {
inline mirror::ClassLoader* CompilerDriver::GetClassLoader(const ScopedObjectAccess& soa,
const DexCompilationUnit* mUnit) {
return soa.Decode<mirror::ClassLoader>(mUnit->GetClassLoader()).Ptr();
}
inline mirror::Class* CompilerDriver::ResolveClass(
const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, uint16_t cls_index,
const DexCompilationUnit* mUnit) {
DCHECK_EQ(dex_cache->GetDexFile(), mUnit->GetDexFile());
DCHECK_EQ(class_loader.Get(), GetClassLoader(soa, mUnit));
mirror::Class* cls = mUnit->GetClassLinker()->ResolveType(
*mUnit->GetDexFile(), cls_index, dex_cache, class_loader);
DCHECK_EQ(cls == nullptr, soa.Self()->IsExceptionPending());
if (UNLIKELY(cls == nullptr)) {
// Clean up any exception left by type resolution.
soa.Self()->ClearException();
}
return cls;
}
inline mirror::Class* CompilerDriver::ResolveCompilingMethodsClass(
const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit) {
DCHECK_EQ(dex_cache->GetDexFile(), mUnit->GetDexFile());
DCHECK_EQ(class_loader.Get(), GetClassLoader(soa, mUnit));
const DexFile::MethodId& referrer_method_id =
mUnit->GetDexFile()->GetMethodId(mUnit->GetDexMethodIndex());
return ResolveClass(soa, dex_cache, class_loader, referrer_method_id.class_idx_, mUnit);
}
inline ArtField* CompilerDriver::ResolveFieldWithDexFile(
const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, const DexFile* dex_file,
uint32_t field_idx, bool is_static) {
DCHECK_EQ(dex_cache->GetDexFile(), dex_file);
ArtField* resolved_field = Runtime::Current()->GetClassLinker()->ResolveField(
*dex_file, field_idx, dex_cache, class_loader, is_static);
DCHECK_EQ(resolved_field == nullptr, soa.Self()->IsExceptionPending());
if (UNLIKELY(resolved_field == nullptr)) {
// Clean up any exception left by type resolution.
soa.Self()->ClearException();
return nullptr;
}
if (UNLIKELY(resolved_field->IsStatic() != is_static)) {
// ClassLinker can return a field of the wrong kind directly from the DexCache.
// Silently return null on such incompatible class change.
return nullptr;
}
return resolved_field;
}
inline ArtField* CompilerDriver::ResolveField(
const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit,
uint32_t field_idx, bool is_static) {
DCHECK_EQ(class_loader.Get(), GetClassLoader(soa, mUnit));
return ResolveFieldWithDexFile(soa, dex_cache, class_loader, mUnit->GetDexFile(), field_idx,
is_static);
}
inline std::pair<bool, bool> CompilerDriver::IsFastInstanceField(
mirror::DexCache* dex_cache, mirror::Class* referrer_class,
ArtField* resolved_field, uint16_t field_idx) {
DCHECK(!resolved_field->IsStatic());
ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass();
bool fast_get = referrer_class != nullptr &&
referrer_class->CanAccessResolvedField(fields_class.Ptr(),
resolved_field,
dex_cache,
field_idx);
bool fast_put = fast_get && (!resolved_field->IsFinal() || fields_class == referrer_class);
return std::make_pair(fast_get, fast_put);
}
template <typename ArtMember>
inline bool CompilerDriver::CanAccessResolvedMember(mirror::Class* referrer_class ATTRIBUTE_UNUSED,
mirror::Class* access_to ATTRIBUTE_UNUSED,
ArtMember* member ATTRIBUTE_UNUSED,
mirror::DexCache* dex_cache ATTRIBUTE_UNUSED,
uint32_t field_idx ATTRIBUTE_UNUSED) {
// Not defined for ArtMember values other than ArtField or ArtMethod.
UNREACHABLE();
}
template <>
inline bool CompilerDriver::CanAccessResolvedMember<ArtField>(mirror::Class* referrer_class,
mirror::Class* access_to,
ArtField* field,
mirror::DexCache* dex_cache,
uint32_t field_idx) {
return referrer_class->CanAccessResolvedField(access_to, field, dex_cache, field_idx);
}
template <>
inline bool CompilerDriver::CanAccessResolvedMember<ArtMethod>(
mirror::Class* referrer_class,
mirror::Class* access_to,
ArtMethod* method,
mirror::DexCache* dex_cache,
uint32_t field_idx) {
return referrer_class->CanAccessResolvedMethod(access_to, method, dex_cache, field_idx);
}
template <typename ArtMember>
inline std::pair<bool, bool> CompilerDriver::IsClassOfStaticMemberAvailableToReferrer(
mirror::DexCache* dex_cache,
mirror::Class* referrer_class,
ArtMember* resolved_member,
uint16_t member_idx,
uint32_t* storage_index) {
DCHECK(resolved_member->IsStatic());
if (LIKELY(referrer_class != nullptr)) {
ObjPtr<mirror::Class> members_class = resolved_member->GetDeclaringClass();
if (members_class == referrer_class) {
*storage_index = members_class->GetDexTypeIndex();
return std::make_pair(true, true);
}
if (CanAccessResolvedMember<ArtMember>(
referrer_class, members_class.Ptr(), resolved_member, dex_cache, member_idx)) {
// We have the resolved member, we must make it into a index for the referrer
// in its static storage (which may fail if it doesn't have a slot for it)
// TODO: for images we can elide the static storage base null check
// if we know there's a non-null entry in the image
const DexFile* dex_file = dex_cache->GetDexFile();
uint32_t storage_idx = DexFile::kDexNoIndex;
if (LIKELY(members_class->GetDexCache() == dex_cache)) {
// common case where the dex cache of both the referrer and the member are the same,
// no need to search the dex file
storage_idx = members_class->GetDexTypeIndex();
} else {
// Search dex file for localized ssb index, may fail if member's class is a parent
// of the class mentioned in the dex file and there is no dex cache entry.
storage_idx = resolved_member->GetDeclaringClass()->FindTypeIndexInOtherDexFile(*dex_file);
}
if (storage_idx != DexFile::kDexNoIndex) {
*storage_index = storage_idx;
return std::make_pair(true, !resolved_member->IsFinal());
}
}
}
// Conservative defaults.
*storage_index = DexFile::kDexNoIndex;
return std::make_pair(false, false);
}
inline std::pair<bool, bool> CompilerDriver::IsFastStaticField(
mirror::DexCache* dex_cache, mirror::Class* referrer_class,
ArtField* resolved_field, uint16_t field_idx, uint32_t* storage_index) {
return IsClassOfStaticMemberAvailableToReferrer(
dex_cache, referrer_class, resolved_field, field_idx, storage_index);
}
inline bool CompilerDriver::IsClassOfStaticMethodAvailableToReferrer(
mirror::DexCache* dex_cache, mirror::Class* referrer_class,
ArtMethod* resolved_method, uint16_t method_idx, uint32_t* storage_index) {
std::pair<bool, bool> result = IsClassOfStaticMemberAvailableToReferrer(
dex_cache, referrer_class, resolved_method, method_idx, storage_index);
// Only the first member of `result` is meaningful, as there is no
// "write access" to a method.
return result.first;
}
inline ArtMethod* CompilerDriver::ResolveMethod(
ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache,
Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit,
uint32_t method_idx, InvokeType invoke_type, bool check_incompatible_class_change) {
DCHECK_EQ(class_loader.Get(), GetClassLoader(soa, mUnit));
ArtMethod* resolved_method =
check_incompatible_class_change
? mUnit->GetClassLinker()->ResolveMethod<ClassLinker::kForceICCECheck>(
*dex_cache->GetDexFile(), method_idx, dex_cache, class_loader, nullptr, invoke_type)
: mUnit->GetClassLinker()->ResolveMethod<ClassLinker::kNoICCECheckForCache>(
*dex_cache->GetDexFile(), method_idx, dex_cache, class_loader, nullptr, invoke_type);
if (UNLIKELY(resolved_method == nullptr)) {
DCHECK(soa.Self()->IsExceptionPending());
// Clean up any exception left by type resolution.
soa.Self()->ClearException();
}
return resolved_method;
}
} // namespace art
#endif // ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_
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