/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "aot_class_linker.h"
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#include "class_status.h"
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#include "compiler_callbacks.h"
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#include "dex/class_reference.h"
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#include "handle_scope-inl.h"
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#include "mirror/class-inl.h"
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#include "runtime.h"
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#include "verifier/verifier_enums.h"
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namespace art {
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AotClassLinker::AotClassLinker(InternTable* intern_table)
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: ClassLinker(intern_table, /*fast_class_not_found_exceptions=*/ false) {}
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AotClassLinker::~AotClassLinker() {}
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// Wrap the original InitializeClass with creation of transaction when in strict mode.
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bool AotClassLinker::InitializeClass(Thread* self,
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Handle<mirror::Class> klass,
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bool can_init_statics,
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bool can_init_parents) {
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Runtime* const runtime = Runtime::Current();
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bool strict_mode_ = runtime->IsActiveStrictTransactionMode();
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DCHECK(klass != nullptr);
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if (klass->IsInitialized() || klass->IsInitializing()) {
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return ClassLinker::InitializeClass(self, klass, can_init_statics, can_init_parents);
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}
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// Don't initialize klass if it's superclass is not initialized, because superclass might abort
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// the transaction and rolled back after klass's change is commited.
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if (strict_mode_ && !klass->IsInterface() && klass->HasSuperClass()) {
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if (klass->GetSuperClass()->GetStatus() == ClassStatus::kInitializing) {
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runtime->AbortTransactionAndThrowAbortError(self, "Can't resolve "
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+ klass->PrettyTypeOf() + " because it's superclass is not initialized.");
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return false;
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}
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}
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if (strict_mode_) {
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runtime->EnterTransactionMode(true, klass.Get()->AsClass().Ptr());
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}
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bool success = ClassLinker::InitializeClass(self, klass, can_init_statics, can_init_parents);
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if (strict_mode_) {
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if (success) {
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// Exit Transaction if success.
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runtime->ExitTransactionMode();
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} else {
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// If not successfully initialized, the last transaction must abort. Don't rollback
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// immediately, leave the cleanup to compiler driver which needs abort message and exception.
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DCHECK(runtime->IsTransactionAborted());
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DCHECK(self->IsExceptionPending());
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}
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}
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return success;
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}
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verifier::FailureKind AotClassLinker::PerformClassVerification(Thread* self,
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Handle<mirror::Class> klass,
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verifier::HardFailLogMode log_level,
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std::string* error_msg) {
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Runtime* const runtime = Runtime::Current();
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CompilerCallbacks* callbacks = runtime->GetCompilerCallbacks();
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ClassStatus old_status = callbacks->GetPreviousClassState(
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ClassReference(&klass->GetDexFile(), klass->GetDexClassDefIndex()));
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// Was it verified? Report no failure.
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if (old_status >= ClassStatus::kVerified) {
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return verifier::FailureKind::kNoFailure;
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}
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// Does it need to be verified at runtime? Report soft failure.
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if (old_status >= ClassStatus::kRetryVerificationAtRuntime) {
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// Error messages from here are only reported through -verbose:class. It is not worth it to
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// create a message.
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return verifier::FailureKind::kSoftFailure;
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}
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// Do the actual work.
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return ClassLinker::PerformClassVerification(self, klass, log_level, error_msg);
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}
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} // namespace art
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