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/logging.h"
20 #include "base/stl_util.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-inl.h"
28
29 namespace art {
30
VerificationResults(const CompilerOptions * compiler_options)31 VerificationResults::VerificationResults(const CompilerOptions* compiler_options)
32 : compiler_options_(compiler_options),
33 verified_methods_lock_("compiler verified methods lock"),
34 verified_methods_(),
35 rejected_classes_lock_("compiler rejected classes lock"),
36 rejected_classes_() {
37 UNUSED(compiler_options);
38 }
39
~VerificationResults()40 VerificationResults::~VerificationResults() {
41 Thread* self = Thread::Current();
42 {
43 WriterMutexLock mu(self, verified_methods_lock_);
44 STLDeleteValues(&verified_methods_);
45 }
46 }
47
ProcessVerifiedMethod(verifier::MethodVerifier * method_verifier)48 bool VerificationResults::ProcessVerifiedMethod(verifier::MethodVerifier* method_verifier) {
49 DCHECK(method_verifier != nullptr);
50 MethodReference ref = method_verifier->GetMethodReference();
51 bool compile = IsCandidateForCompilation(ref, method_verifier->GetAccessFlags());
52 const VerifiedMethod* verified_method = VerifiedMethod::Create(method_verifier, compile);
53 if (verified_method == nullptr) {
54 // Do not report an error to the verifier. We'll just punt this later.
55 return true;
56 }
57
58 WriterMutexLock mu(Thread::Current(), verified_methods_lock_);
59 auto it = verified_methods_.find(ref);
60 if (it != verified_methods_.end()) {
61 // TODO: Investigate why are we doing the work again for this method and try to avoid it.
62 LOG(WARNING) << "Method processed more than once: "
63 << PrettyMethod(ref.dex_method_index, *ref.dex_file);
64 if (!Runtime::Current()->UseJit()) {
65 DCHECK_EQ(it->second->GetDevirtMap().size(), verified_method->GetDevirtMap().size());
66 DCHECK_EQ(it->second->GetSafeCastSet().size(), verified_method->GetSafeCastSet().size());
67 }
68 DCHECK_EQ(it->second->GetDexGcMap().size(), verified_method->GetDexGcMap().size());
69 // Delete the new verified method since there was already an existing one registered. It
70 // is unsafe to replace the existing one since the JIT may be using it to generate a
71 // native GC map.
72 delete verified_method;
73 return true;
74 }
75 verified_methods_.Put(ref, verified_method);
76 DCHECK(verified_methods_.find(ref) != verified_methods_.end());
77 return true;
78 }
79
GetVerifiedMethod(MethodReference ref)80 const VerifiedMethod* VerificationResults::GetVerifiedMethod(MethodReference ref) {
81 ReaderMutexLock mu(Thread::Current(), verified_methods_lock_);
82 auto it = verified_methods_.find(ref);
83 return (it != verified_methods_.end()) ? it->second : nullptr;
84 }
85
RemoveVerifiedMethod(MethodReference ref)86 void VerificationResults::RemoveVerifiedMethod(MethodReference ref) {
87 WriterMutexLock mu(Thread::Current(), verified_methods_lock_);
88 auto it = verified_methods_.find(ref);
89 if (it != verified_methods_.end()) {
90 delete it->second;
91 verified_methods_.erase(it);
92 }
93 }
94
AddRejectedClass(ClassReference ref)95 void VerificationResults::AddRejectedClass(ClassReference ref) {
96 {
97 WriterMutexLock mu(Thread::Current(), rejected_classes_lock_);
98 rejected_classes_.insert(ref);
99 }
100 DCHECK(IsClassRejected(ref));
101 }
102
IsClassRejected(ClassReference ref)103 bool VerificationResults::IsClassRejected(ClassReference ref) {
104 ReaderMutexLock mu(Thread::Current(), rejected_classes_lock_);
105 return (rejected_classes_.find(ref) != rejected_classes_.end());
106 }
107
IsCandidateForCompilation(MethodReference &,const uint32_t access_flags)108 bool VerificationResults::IsCandidateForCompilation(MethodReference&,
109 const uint32_t access_flags) {
110 if (!compiler_options_->IsCompilationEnabled()) {
111 return false;
112 }
113 // Don't compile class initializers unless kEverything.
114 if ((compiler_options_->GetCompilerFilter() != CompilerOptions::kEverything) &&
115 ((access_flags & kAccConstructor) != 0) && ((access_flags & kAccStatic) != 0)) {
116 return false;
117 }
118 return true;
119 }
120
121 } // namespace art
122