| /* |
| * 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, /*fast_class_not_found_exceptions=*/ false) {} |
| |
| AotClassLinker::~AotClassLinker() {} |
| |
| bool AotClassLinker::CanAllocClass() { |
| // AllocClass doesn't work under transaction, so we abort. |
| if (Runtime::Current()->IsActiveTransaction()) { |
| Runtime::Current()->AbortTransactionAndThrowAbortError( |
| Thread::Current(), "Can't resolve type within transaction."); |
| return false; |
| } |
| return ClassLinker::CanAllocClass(); |
| } |
| |
| // 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); |
| } |
| |
| // When compiling a boot image extension, do not initialize a class defined |
| // in a dex file belonging to the boot image we're compiling against. |
| // However, we must allow the initialization of TransactionAbortError, |
| // VerifyError, etc. outside of a transaction. |
| if (!strict_mode && runtime->GetHeap()->ObjectIsInBootImageSpace(klass->GetDexCache())) { |
| if (runtime->IsActiveTransaction()) { |
| runtime->AbortTransactionAndThrowAbortError(self, "Can't initialize " + klass->PrettyTypeOf() |
| + " because it is defined in a boot image dex file."); |
| return false; |
| } |
| CHECK(klass->IsThrowableClass()) << klass->PrettyDescriptor(); |
| } |
| |
| // When in strict_mode, don't initialize a class if it belongs to boot but not initialized. |
| if (strict_mode && klass->IsBootStrapClassLoaded()) { |
| runtime->AbortTransactionAndThrowAbortError(self, "Can't resolve " |
| + klass->PrettyTypeOf() + " because it is an uninitialized boot class."); |
| return false; |
| } |
| |
| // 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(/*strict=*/ true, klass.Get()); |
| } |
| 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, don't rollback immediately, leave the cleanup to compiler |
| // driver which needs abort message and exception. |
| 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 |