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/*
* Copyright (C) 2017 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 "aot_class_linker.h"
#include "class_status.h"
#include "compiler_callbacks.h"
#include "dex/class_reference.h"
#include "handle_scope-inl.h"
#include "mirror/class-inl.h"
#include "runtime.h"
#include "verifier/verifier_enums.h"
namespace art {
AotClassLinker::AotClassLinker(InternTable *intern_table) : ClassLinker(intern_table) {}
AotClassLinker::~AotClassLinker() {}
// Wrap the original InitializeClass with creation of transaction when in strict mode.
bool AotClassLinker::InitializeClass(Thread* self, Handle<mirror::Class> klass,
bool can_init_statics, bool can_init_parents) {
Runtime* const runtime = Runtime::Current();
bool strict_mode_ = runtime->IsActiveStrictTransactionMode();
DCHECK(klass != nullptr);
if (klass->IsInitialized() || klass->IsInitializing()) {
return ClassLinker::InitializeClass(self, klass, can_init_statics, can_init_parents);
}
// Don't initialize klass if it's superclass is not initialized, because superclass might abort
// the transaction and rolled back after klass's change is commited.
if (strict_mode_ && !klass->IsInterface() && klass->HasSuperClass()) {
if (klass->GetSuperClass()->GetStatus() == ClassStatus::kInitializing) {
runtime->AbortTransactionAndThrowAbortError(self, "Can't resolve "
+ klass->PrettyTypeOf() + " because it's superclass is not initialized.");
return false;
}
}
if (strict_mode_) {
runtime->EnterTransactionMode(true, klass.Get()->AsClass());
}
bool success = ClassLinker::InitializeClass(self, klass, can_init_statics, can_init_parents);
if (strict_mode_) {
if (success) {
// Exit Transaction if success.
runtime->ExitTransactionMode();
} else {
// If not successfully initialized, the last transaction must abort. Don't rollback
// immediately, leave the cleanup to compiler driver which needs abort message and exception.
DCHECK(runtime->IsTransactionAborted());
DCHECK(self->IsExceptionPending());
}
}
return success;
}
verifier::FailureKind AotClassLinker::PerformClassVerification(Thread* self,
Handle<mirror::Class> klass,
verifier::HardFailLogMode log_level,
std::string* error_msg) {
Runtime* const runtime = Runtime::Current();
CompilerCallbacks* callbacks = runtime->GetCompilerCallbacks();
ClassStatus old_status = callbacks->GetPreviousClassState(
ClassReference(&klass->GetDexFile(), klass->GetDexClassDefIndex()));
// Was it verified? Report no failure.
if (old_status >= ClassStatus::kVerified) {
return verifier::FailureKind::kNoFailure;
}
// Does it need to be verified at runtime? Report soft failure.
if (old_status >= ClassStatus::kRetryVerificationAtRuntime) {
// Error messages from here are only reported through -verbose:class. It is not worth it to
// create a message.
return verifier::FailureKind::kSoftFailure;
}
// Do the actual work.
return ClassLinker::PerformClassVerification(self, klass, log_level, error_msg);
}
} // namespace art
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