1 /*
2  * Copyright (C) 2011 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 "dex_cache.h"
18 
19 #include "art_method-inl.h"
20 #include "base/logging.h"
21 #include "class_linker.h"
22 #include "gc/accounting/card_table-inl.h"
23 #include "gc/heap.h"
24 #include "globals.h"
25 #include "object.h"
26 #include "object-inl.h"
27 #include "object_array-inl.h"
28 #include "runtime.h"
29 #include "string.h"
30 
31 namespace art {
32 namespace mirror {
33 
Init(const DexFile * dex_file,String * location,ObjectArray<String> * strings,ObjectArray<Class> * resolved_types,PointerArray * resolved_methods,PointerArray * resolved_fields,size_t pointer_size)34 void DexCache::Init(const DexFile* dex_file, String* location, ObjectArray<String>* strings,
35                     ObjectArray<Class>* resolved_types, PointerArray* resolved_methods,
36                     PointerArray* resolved_fields, size_t pointer_size) {
37   CHECK(dex_file != nullptr);
38   CHECK(location != nullptr);
39   CHECK(strings != nullptr);
40   CHECK(resolved_types != nullptr);
41   CHECK(resolved_methods != nullptr);
42   CHECK(resolved_fields != nullptr);
43 
44   SetDexFile(dex_file);
45   SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(DexCache, location_), location);
46   SetFieldObject<false>(StringsOffset(), strings);
47   SetFieldObject<false>(ResolvedFieldsOffset(), resolved_fields);
48   SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(DexCache, resolved_types_), resolved_types);
49   SetFieldObject<false>(ResolvedMethodsOffset(), resolved_methods);
50 
51   Runtime* const runtime = Runtime::Current();
52   if (runtime->HasResolutionMethod()) {
53     // Initialize the resolve methods array to contain trampolines for resolution.
54     Fixup(runtime->GetResolutionMethod(), pointer_size);
55   }
56 }
57 
Fixup(ArtMethod * trampoline,size_t pointer_size)58 void DexCache::Fixup(ArtMethod* trampoline, size_t pointer_size) {
59   // Fixup the resolve methods array to contain trampoline for resolution.
60   CHECK(trampoline != nullptr);
61   CHECK(trampoline->IsRuntimeMethod());
62   auto* resolved_methods = GetResolvedMethods();
63   for (size_t i = 0, length = resolved_methods->GetLength(); i < length; i++) {
64     if (resolved_methods->GetElementPtrSize<ArtMethod*>(i, pointer_size) == nullptr) {
65       resolved_methods->SetElementPtrSize(i, trampoline, pointer_size);
66     }
67   }
68 }
69 
70 }  // namespace mirror
71 }  // namespace art
72