1 /*
2  * Copyright (C) 2017 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 #ifndef ART_RUNTIME_AOT_CLASS_LINKER_H_
18 #define ART_RUNTIME_AOT_CLASS_LINKER_H_
19 
20 #include "sdk_checker.h"
21 #include "class_linker.h"
22 
23 namespace art {
24 
25 namespace gc {
26 class Heap;
27 }  // namespace gc
28 
29 // AotClassLinker is only used for AOT compiler, which includes some logic for class initialization
30 // which will only be used in pre-compilation.
31 class AotClassLinker : public ClassLinker {
32  public:
33   explicit AotClassLinker(InternTable *intern_table);
34   ~AotClassLinker();
35 
36 static bool CanReferenceInBootImageExtension(ObjPtr<mirror::Class> klass, gc::Heap* heap)
37       REQUIRES_SHARED(Locks::mutator_lock_);
38 
39   bool SetUpdatableBootClassPackages(const std::vector<std::string>& packages);
40 
41   void SetSdkChecker(std::unique_ptr<SdkChecker>&& sdk_checker_);
42   const SdkChecker* GetSdkChecker() const;
43 
44   bool DenyAccessBasedOnPublicSdk(ArtMethod* art_method ATTRIBUTE_UNUSED) const override
45       REQUIRES_SHARED(Locks::mutator_lock_);
46   bool DenyAccessBasedOnPublicSdk(ArtField* art_field ATTRIBUTE_UNUSED) const override
47       REQUIRES_SHARED(Locks::mutator_lock_);
48   bool DenyAccessBasedOnPublicSdk(const char* type_descriptor ATTRIBUTE_UNUSED) const override;
49   void SetEnablePublicSdkChecks(bool enabled) override;
50 
51  protected:
52   // Overridden version of PerformClassVerification allows skipping verification if the class was
53   // previously verified but unloaded.
54   verifier::FailureKind PerformClassVerification(Thread* self,
55                                                  verifier::VerifierDeps* verifier_deps,
56                                                  Handle<mirror::Class> klass,
57                                                  verifier::HardFailLogMode log_level,
58                                                  std::string* error_msg)
59       override
60       REQUIRES_SHARED(Locks::mutator_lock_);
61 
62   // Override AllocClass because aot compiler will need to perform a transaction check to determine
63   // can we allocate class from heap.
64   bool CanAllocClass()
65       override
66       REQUIRES_SHARED(Locks::mutator_lock_)
67       REQUIRES(!Roles::uninterruptible_);
68 
69   bool InitializeClass(Thread *self,
70                        Handle<mirror::Class> klass,
71                        bool can_run_clinit,
72                        bool can_init_parents)
73       override
74       REQUIRES_SHARED(Locks::mutator_lock_)
75       REQUIRES(!Locks::dex_lock_);
76 
77   bool IsUpdatableBootClassPathDescriptor(const char* descriptor) override;
78 
79  private:
80   std::vector<std::string> updatable_boot_class_path_descriptor_prefixes_;
81 
82   std::unique_ptr<SdkChecker> sdk_checker_;
83 };
84 
85 }  // namespace art
86 
87 #endif  // ART_RUNTIME_AOT_CLASS_LINKER_H_
88