1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "verification_results.h" 18 19 #include "base/stl_util.h" 20 #include "base/mutex.h" 21 #include "base/mutex-inl.h" 22 #include "driver/compiler_driver.h" 23 #include "driver/compiler_options.h" 24 #include "thread.h" 25 #include "thread-inl.h" 26 #include "verified_method.h" 27 #include "verifier/method_verifier.h" 28 #include "verifier/method_verifier-inl.h" 29 30 namespace art { 31 32 VerificationResults::VerificationResults(const CompilerOptions* compiler_options) 33 : compiler_options_(compiler_options), 34 verified_methods_lock_("compiler verified methods lock"), 35 verified_methods_(), 36 rejected_classes_lock_("compiler rejected classes lock"), 37 rejected_classes_() { 38 UNUSED(compiler_options); 39 } 40 41 VerificationResults::~VerificationResults() { 42 Thread* self = Thread::Current(); 43 { 44 WriterMutexLock mu(self, verified_methods_lock_); 45 STLDeleteValues(&verified_methods_); 46 } 47 } 48 49 bool VerificationResults::ProcessVerifiedMethod(verifier::MethodVerifier* method_verifier) { 50 DCHECK(method_verifier != NULL); 51 MethodReference ref = method_verifier->GetMethodReference(); 52 bool compile = IsCandidateForCompilation(ref, method_verifier->GetAccessFlags()); 53 // TODO: Check also for virtual/interface invokes when DEX-to-DEX supports devirtualization. 54 if (!compile && !method_verifier->HasCheckCasts()) { 55 return true; 56 } 57 58 const VerifiedMethod* verified_method = VerifiedMethod::Create(method_verifier, compile); 59 if (verified_method == nullptr) { 60 // Do not report an error to the verifier. We'll just punt this later. 61 return true; 62 } 63 64 WriterMutexLock mu(Thread::Current(), verified_methods_lock_); 65 auto it = verified_methods_.find(ref); 66 if (it != verified_methods_.end()) { 67 // TODO: Investigate why are we doing the work again for this method and try to avoid it. 68 LOG(WARNING) << "Method processed more than once: " 69 << PrettyMethod(ref.dex_method_index, *ref.dex_file); 70 DCHECK_EQ(it->second->GetDevirtMap().size(), verified_method->GetDevirtMap().size()); 71 DCHECK_EQ(it->second->GetSafeCastSet().size(), verified_method->GetSafeCastSet().size()); 72 DCHECK_EQ(it->second->GetDexGcMap().size(), verified_method->GetDexGcMap().size()); 73 delete it->second; 74 verified_methods_.erase(it); 75 } 76 verified_methods_.Put(ref, verified_method); 77 DCHECK(verified_methods_.find(ref) != verified_methods_.end()); 78 return true; 79 } 80 81 const VerifiedMethod* VerificationResults::GetVerifiedMethod(MethodReference ref) { 82 ReaderMutexLock mu(Thread::Current(), verified_methods_lock_); 83 auto it = verified_methods_.find(ref); 84 return (it != verified_methods_.end()) ? it->second : nullptr; 85 } 86 87 void VerificationResults::RemoveVerifiedMethod(MethodReference ref) { 88 WriterMutexLock mu(Thread::Current(), verified_methods_lock_); 89 auto it = verified_methods_.find(ref); 90 if (it != verified_methods_.end()) { 91 delete it->second; 92 verified_methods_.erase(it); 93 } 94 } 95 96 void VerificationResults::AddRejectedClass(ClassReference ref) { 97 { 98 WriterMutexLock mu(Thread::Current(), rejected_classes_lock_); 99 rejected_classes_.insert(ref); 100 } 101 DCHECK(IsClassRejected(ref)); 102 } 103 104 bool VerificationResults::IsClassRejected(ClassReference ref) { 105 ReaderMutexLock mu(Thread::Current(), rejected_classes_lock_); 106 return (rejected_classes_.find(ref) != rejected_classes_.end()); 107 } 108 109 bool VerificationResults::IsCandidateForCompilation(MethodReference& method_ref, 110 const uint32_t access_flags) { 111 #ifdef ART_SEA_IR_MODE 112 bool use_sea = compiler_options_->GetSeaIrMode(); 113 use_sea = use_sea && (std::string::npos != PrettyMethod( 114 method_ref.dex_method_index, *(method_ref.dex_file)).find("fibonacci")); 115 if (use_sea) { 116 return true; 117 } 118 #endif 119 if (!compiler_options_->IsCompilationEnabled()) { 120 return false; 121 } 122 // Don't compile class initializers, ever. 123 if (((access_flags & kAccConstructor) != 0) && ((access_flags & kAccStatic) != 0)) { 124 return false; 125 } 126 return true; 127 } 128 129 } // namespace art 130