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
VerificationResults(const CompilerOptions * compiler_options)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
~VerificationResults()41 VerificationResults::~VerificationResults() {
42 Thread* self = Thread::Current();
43 {
44 WriterMutexLock mu(self, verified_methods_lock_);
45 STLDeleteValues(&verified_methods_);
46 }
47 }
48
ProcessVerifiedMethod(verifier::MethodVerifier * method_verifier)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
GetVerifiedMethod(MethodReference ref)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
RemoveVerifiedMethod(MethodReference ref)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
AddRejectedClass(ClassReference ref)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
IsClassRejected(ClassReference ref)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
IsCandidateForCompilation(MethodReference & method_ref,const uint32_t access_flags)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