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      1 /*
      2  * Copyright (C) 2015 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 "method.h"
     18 
     19 #include "art_method.h"
     20 #include "gc_root-inl.h"
     21 #include "mirror/class-inl.h"
     22 #include "mirror/object-inl.h"
     23 
     24 namespace art {
     25 namespace mirror {
     26 
     27 GcRoot<Class> Method::static_class_;
     28 GcRoot<Class> Method::array_class_;
     29 GcRoot<Class> Constructor::static_class_;
     30 GcRoot<Class> Constructor::array_class_;
     31 
     32 void Method::SetClass(Class* klass) {
     33   CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
     34   CHECK(klass != nullptr);
     35   static_class_ = GcRoot<Class>(klass);
     36 }
     37 
     38 void Method::ResetClass() {
     39   CHECK(!static_class_.IsNull());
     40   static_class_ = GcRoot<Class>(nullptr);
     41 }
     42 
     43 void Method::SetArrayClass(Class* klass) {
     44   CHECK(array_class_.IsNull()) << array_class_.Read() << " " << klass;
     45   CHECK(klass != nullptr);
     46   array_class_ = GcRoot<Class>(klass);
     47 }
     48 
     49 void Method::ResetArrayClass() {
     50   CHECK(!array_class_.IsNull());
     51   array_class_ = GcRoot<Class>(nullptr);
     52 }
     53 
     54 template <PointerSize kPointerSize, bool kTransactionActive>
     55 Method* Method::CreateFromArtMethod(Thread* self, ArtMethod* method) {
     56   DCHECK(!method->IsConstructor()) << method->PrettyMethod();
     57   ObjPtr<Method> ret = ObjPtr<Method>::DownCast(StaticClass()->AllocObject(self));
     58   if (LIKELY(ret != nullptr)) {
     59     ObjPtr<Executable>(ret)->
     60         CreateFromArtMethod<kPointerSize, kTransactionActive>(method);
     61   }
     62   return ret.Ptr();
     63 }
     64 
     65 template Method* Method::CreateFromArtMethod<PointerSize::k32, false>(Thread* self,
     66                                                                       ArtMethod* method);
     67 template Method* Method::CreateFromArtMethod<PointerSize::k32, true>(Thread* self,
     68                                                                      ArtMethod* method);
     69 template Method* Method::CreateFromArtMethod<PointerSize::k64, false>(Thread* self,
     70                                                                       ArtMethod* method);
     71 template Method* Method::CreateFromArtMethod<PointerSize::k64, true>(Thread* self,
     72                                                                      ArtMethod* method);
     73 
     74 void Method::VisitRoots(RootVisitor* visitor) {
     75   static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
     76   array_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
     77 }
     78 
     79 void Constructor::SetClass(Class* klass) {
     80   CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
     81   CHECK(klass != nullptr);
     82   static_class_ = GcRoot<Class>(klass);
     83 }
     84 
     85 void Constructor::ResetClass() {
     86   CHECK(!static_class_.IsNull());
     87   static_class_ = GcRoot<Class>(nullptr);
     88 }
     89 
     90 void Constructor::SetArrayClass(Class* klass) {
     91   CHECK(array_class_.IsNull()) << array_class_.Read() << " " << klass;
     92   CHECK(klass != nullptr);
     93   array_class_ = GcRoot<Class>(klass);
     94 }
     95 
     96 void Constructor::ResetArrayClass() {
     97   CHECK(!array_class_.IsNull());
     98   array_class_ = GcRoot<Class>(nullptr);
     99 }
    100 
    101 void Constructor::VisitRoots(RootVisitor* visitor) {
    102   static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
    103   array_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
    104 }
    105 
    106 template <PointerSize kPointerSize, bool kTransactionActive>
    107 Constructor* Constructor::CreateFromArtMethod(Thread* self, ArtMethod* method) {
    108   DCHECK(method->IsConstructor()) << method->PrettyMethod();
    109   ObjPtr<Constructor> ret = ObjPtr<Constructor>::DownCast(StaticClass()->AllocObject(self));
    110   if (LIKELY(ret != nullptr)) {
    111     ObjPtr<Executable>(ret)->
    112         CreateFromArtMethod<kPointerSize, kTransactionActive>(method);
    113   }
    114   return ret.Ptr();
    115 }
    116 
    117 template Constructor* Constructor::CreateFromArtMethod<PointerSize::k32, false>(
    118     Thread* self, ArtMethod* method);
    119 template Constructor* Constructor::CreateFromArtMethod<PointerSize::k32, true>(
    120     Thread* self, ArtMethod* method);
    121 template Constructor* Constructor::CreateFromArtMethod<PointerSize::k64, false>(
    122     Thread* self, ArtMethod* method);
    123 template Constructor* Constructor::CreateFromArtMethod<PointerSize::k64, true>(
    124     Thread* self, ArtMethod* method);
    125 
    126 }  // namespace mirror
    127 }  // namespace art
    128