1 /*
2 * Copyright (C) 2012 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 "callee_save_frame.h"
18 #include "entrypoints/entrypoint_utils.h"
19 #include "mirror/class-inl.h"
20 #include "mirror/object-inl.h"
21 #include "mirror/object_array-inl.h"
22
23 namespace art {
24
25 // Assignable test for code, won't throw. Null and equality tests already performed
artIsAssignableFromCode(const mirror::Class * klass,const mirror::Class * ref_class)26 extern "C" uint32_t artIsAssignableFromCode(const mirror::Class* klass,
27 const mirror::Class* ref_class)
28 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
29 DCHECK(klass != NULL);
30 DCHECK(ref_class != NULL);
31 return klass->IsAssignableFrom(ref_class) ? 1 : 0;
32 }
33
34 // Check whether it is safe to cast one class to the other, throw exception and return -1 on failure
artCheckCastFromCode(mirror::Class * src_type,mirror::Class * dest_type,Thread * self,mirror::ArtMethod ** sp)35 extern "C" int artCheckCastFromCode(mirror::Class* src_type, mirror::Class* dest_type,
36 Thread* self, mirror::ArtMethod** sp)
37 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
38 DCHECK(src_type->IsClass()) << PrettyClass(src_type);
39 DCHECK(dest_type->IsClass()) << PrettyClass(dest_type);
40 if (LIKELY(dest_type->IsAssignableFrom(src_type))) {
41 return 0; // Success
42 } else {
43 FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly);
44 ThrowClassCastException(dest_type, src_type);
45 return -1; // Failure
46 }
47 }
48
49 // Tests whether 'element' can be assigned into an array of type 'array_class'.
50 // Returns 0 on success and -1 if an exception is pending.
artCanPutArrayElementFromCode(const mirror::Object * element,const mirror::Class * array_class,Thread * self,mirror::ArtMethod ** sp)51 extern "C" int artCanPutArrayElementFromCode(const mirror::Object* element,
52 const mirror::Class* array_class,
53 Thread* self, mirror::ArtMethod** sp)
54 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
55 DCHECK(array_class != NULL);
56 // element can't be NULL as we catch this is screened in runtime_support
57 mirror::Class* element_class = element->GetClass();
58 mirror::Class* component_type = array_class->GetComponentType();
59 if (LIKELY(component_type->IsAssignableFrom(element_class))) {
60 return 0; // Success
61 } else {
62 FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly);
63 ThrowArrayStoreException(element_class, array_class);
64 return -1; // Failure
65 }
66 }
67
68 } // namespace art
69